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<h1>texture.c</h1><a href="texture_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* This code is (C) AllegroGL contributors, and double licensed under</span>
<a name="l00002"></a>00002 <span class="comment"> * the GPL and zlib licenses. See gpl.txt or zlib.txt for details.</span>
<a name="l00003"></a>00003 <span class="comment"> */</span>
<a name="l00008"></a>00008 <span class="preprocessor">#include <string.h></span>
<a name="l00009"></a>00009
<a name="l00010"></a>00010 <span class="preprocessor">#include "<a class="code" href="alleggl_8h.html" title="Main header file for AllegroGL.">alleggl.h</a>"</span>
<a name="l00011"></a>00011 <span class="preprocessor">#include "allglint.h"</span>
<a name="l00012"></a>00012
<a name="l00013"></a>00013 <span class="preprocessor">#include <allegro/internal/aintern.h></span>
<a name="l00014"></a>00014
<a name="l00015"></a>00015 <span class="preprocessor">#ifdef ALLEGRO_MACOSX</span>
<a name="l00016"></a>00016 <span class="preprocessor"></span><span class="preprocessor">#include <OpenGL/glu.h></span>
<a name="l00017"></a>00017 <span class="preprocessor">#else</span>
<a name="l00018"></a>00018 <span class="preprocessor"></span><span class="preprocessor">#include <GL/glu.h></span>
<a name="l00019"></a>00019 <span class="preprocessor">#endif</span>
<a name="l00020"></a>00020 <span class="preprocessor"></span>
<a name="l00021"></a><a class="code" href="texture_8c.html#e804102a3d2bd8183b3b73c2b21dec1a">00021</a> <span class="keyword">static</span> GLint <a class="code" href="texture_8c.html#e804102a3d2bd8183b3b73c2b21dec1a">allegro_gl_opengl_internal_texture_format</a> = -1;
<a name="l00022"></a><a class="code" href="texture_8c.html#009ebd92a478864b1fdd5eeeb3df5f38">00022</a> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="texture_8c.html#009ebd92a478864b1fdd5eeeb3df5f38">allegro_gl_use_mipmapping_for_textures</a> = 0;
<a name="l00023"></a><a class="code" href="texture_8c.html#4a21cbf7c33064409941c606e8ccda0a">00023</a> <span class="keywordtype">int</span> <a class="code" href="texture_8c.html#4a21cbf7c33064409941c606e8ccda0a">__allegro_gl_use_alpha</a> = FALSE;
<a name="l00024"></a><a class="code" href="texture_8c.html#7e34e2c7cae7e9bb9ad7ddc130db47fb">00024</a> <span class="keywordtype">int</span> <a class="code" href="texture_8c.html#7e34e2c7cae7e9bb9ad7ddc130db47fb">__allegro_gl_flip_texture</a> = TRUE;
<a name="l00025"></a><a class="code" href="texture_8c.html#8416d9ed6c835ba6572ab1e29fe729f2">00025</a> GLint <a class="code" href="texture_8c.html#8416d9ed6c835ba6572ab1e29fe729f2">__allegro_gl_texture_read_format</a>[5];
<a name="l00026"></a><a class="code" href="texture_8c.html#7e74a22ac957103e91218377585b1b76">00026</a> GLint <a class="code" href="texture_8c.html#7e74a22ac957103e91218377585b1b76">__allegro_gl_texture_components</a>[5];
<a name="l00027"></a>00027
<a name="l00028"></a><a class="code" href="texture_8c.html#09462782acac95f9a6da67adf659ed6e">00028</a> <span class="preprocessor">#define PREFIX_I "agl-tex INFO: "</span>
<a name="l00029"></a><a class="code" href="texture_8c.html#d8bfd440530d371de892a20efd3bbc2a">00029</a> <span class="preprocessor"></span><span class="preprocessor">#define PREFIX_W "agl-tex WARNING: "</span>
<a name="l00030"></a><a class="code" href="texture_8c.html#8c04b6ea901068c5cc4020e9a18c0cbe">00030</a> <span class="preprocessor"></span><span class="preprocessor">#define PREFIX_E "agl-tex ERROR: "</span>
<a name="l00031"></a>00031 <span class="preprocessor"></span>
<a name="l00032"></a>00032
<a name="l00038"></a><a class="code" href="texture_8c.html#3492c8521c2bbd3daa2506a232bdce22">00038</a> <span class="keywordtype">char</span> <span class="keyword">const</span> *<a class="code" href="texture_8c.html#3492c8521c2bbd3daa2506a232bdce22">__allegro_gl_get_format_description</a>(GLint format)
<a name="l00039"></a>00039 {
<a name="l00040"></a>00040 <span class="keyword">static</span> <span class="keywordtype">char</span> str[256];
<a name="l00041"></a>00041 <span class="preprocessor">#define F(s) case s: return #s</span>
<a name="l00042"></a>00042 <span class="preprocessor"></span> <span class="keywordflow">switch</span> (format) {
<a name="l00043"></a>00043 F(GL_ALPHA);
<a name="l00044"></a>00044 F(GL_ALPHA4);
<a name="l00045"></a>00045 F(GL_ALPHA8);
<a name="l00046"></a>00046 F(GL_ALPHA12);
<a name="l00047"></a>00047 F(GL_ALPHA16);
<a name="l00048"></a>00048 F(GL_ALPHA16F_ARB);
<a name="l00049"></a>00049 F(GL_ALPHA32F_ARB);
<a name="l00050"></a>00050 F(GL_INTENSITY);
<a name="l00051"></a>00051 F(GL_INTENSITY4);
<a name="l00052"></a>00052 F(GL_INTENSITY8);
<a name="l00053"></a>00053 F(GL_INTENSITY12);
<a name="l00054"></a>00054 F(GL_INTENSITY16);
<a name="l00055"></a>00055 F(GL_INTENSITY16F_ARB);
<a name="l00056"></a>00056 F(GL_INTENSITY32F_ARB);
<a name="l00057"></a>00057 F(GL_LUMINANCE);
<a name="l00058"></a>00058 F(GL_LUMINANCE4);
<a name="l00059"></a>00059 F(GL_LUMINANCE8);
<a name="l00060"></a>00060 F(GL_LUMINANCE12);
<a name="l00061"></a>00061 F(GL_LUMINANCE16);
<a name="l00062"></a>00062 F(GL_LUMINANCE16F_ARB);
<a name="l00063"></a>00063 F(GL_LUMINANCE32F_ARB);
<a name="l00064"></a>00064 F(GL_LUMINANCE_ALPHA);
<a name="l00065"></a>00065 F(GL_LUMINANCE4_ALPHA4);
<a name="l00066"></a>00066 F(GL_LUMINANCE12_ALPHA4);
<a name="l00067"></a>00067 F(GL_LUMINANCE8_ALPHA8);
<a name="l00068"></a>00068 F(GL_LUMINANCE6_ALPHA2);
<a name="l00069"></a>00069 F(GL_LUMINANCE12_ALPHA12);
<a name="l00070"></a>00070 F(GL_LUMINANCE16_ALPHA16);
<a name="l00071"></a>00071 F(GL_LUMINANCE_ALPHA16F_ARB);
<a name="l00072"></a>00072 F(GL_LUMINANCE_ALPHA32F_ARB);
<a name="l00073"></a>00073 F(GL_RGB);
<a name="l00074"></a>00074 F(GL_R3_G3_B2);
<a name="l00075"></a>00075 F(GL_RGB4);
<a name="l00076"></a>00076 F(GL_RGB5);
<a name="l00077"></a>00077 F(GL_RGB8);
<a name="l00078"></a>00078 F(GL_RGB10);
<a name="l00079"></a>00079 F(GL_RGB12);
<a name="l00080"></a>00080 F(GL_RGB16);
<a name="l00081"></a>00081 F(GL_RGB16F_ARB);
<a name="l00082"></a>00082 F(GL_RGB32F_ARB);
<a name="l00083"></a>00083 F(GL_RGBA);
<a name="l00084"></a>00084 F(GL_RGBA2);
<a name="l00085"></a>00085 F(GL_RGBA4);
<a name="l00086"></a>00086 F(GL_RGB5_A1);
<a name="l00087"></a>00087 F(GL_RGBA8);
<a name="l00088"></a>00088 F(GL_RGB10_A2);
<a name="l00089"></a>00089 F(GL_RGBA12);
<a name="l00090"></a>00090 F(GL_RGBA16);
<a name="l00091"></a>00091 F(GL_RGBA16F_ARB);
<a name="l00092"></a>00092 F(GL_RGBA32F_ARB);
<a name="l00093"></a>00093 }
<a name="l00094"></a>00094 uszprintf(str, <span class="keyword">sizeof</span> str, <span class="stringliteral">"%x"</span>, format);
<a name="l00095"></a>00095 <span class="keywordflow">return</span> str;
<a name="l00096"></a>00096 <span class="preprocessor">#undef F</span>
<a name="l00097"></a>00097 <span class="preprocessor"></span>}
<a name="l00098"></a>00098
<a name="l00099"></a>00099
<a name="l00100"></a>00100
<a name="l00101"></a>00101 <span class="comment">/* int __allegro_gl_get_num_channels(GLenum format) */</span>
<a name="l00111"></a><a class="code" href="texture_8c.html#bc0d98647d4bbaa0a0148c0ca76abfc3">00111</a> <span class="keywordtype">int</span> <a class="code" href="texture_8c.html#bc0d98647d4bbaa0a0148c0ca76abfc3">__allegro_gl_get_num_channels</a>(GLenum format) {
<a name="l00112"></a>00112
<a name="l00113"></a>00113 <span class="keywordflow">switch</span> (format) {
<a name="l00114"></a>00114 <span class="keywordflow">case</span> 1:
<a name="l00115"></a>00115 <span class="keywordflow">case</span> GL_ALPHA:
<a name="l00116"></a>00116 <span class="keywordflow">case</span> GL_ALPHA4:
<a name="l00117"></a>00117 <span class="keywordflow">case</span> GL_ALPHA8:
<a name="l00118"></a>00118 <span class="keywordflow">case</span> GL_ALPHA12:
<a name="l00119"></a>00119 <span class="keywordflow">case</span> GL_ALPHA16:
<a name="l00120"></a>00120 <span class="keywordflow">case</span> GL_ALPHA16F_ARB:
<a name="l00121"></a>00121 <span class="keywordflow">case</span> GL_ALPHA32F_ARB:
<a name="l00122"></a>00122 <span class="keywordflow">case</span> GL_INTENSITY:
<a name="l00123"></a>00123 <span class="keywordflow">case</span> GL_INTENSITY4:
<a name="l00124"></a>00124 <span class="keywordflow">case</span> GL_INTENSITY8:
<a name="l00125"></a>00125 <span class="keywordflow">case</span> GL_INTENSITY12:
<a name="l00126"></a>00126 <span class="keywordflow">case</span> GL_INTENSITY16:
<a name="l00127"></a>00127 <span class="keywordflow">case</span> GL_INTENSITY16F_ARB:
<a name="l00128"></a>00128 <span class="keywordflow">case</span> GL_INTENSITY32F_ARB:
<a name="l00129"></a>00129 <span class="keywordflow">case</span> GL_LUMINANCE:
<a name="l00130"></a>00130 <span class="keywordflow">case</span> GL_LUMINANCE4:
<a name="l00131"></a>00131 <span class="keywordflow">case</span> GL_LUMINANCE8:
<a name="l00132"></a>00132 <span class="keywordflow">case</span> GL_LUMINANCE12:
<a name="l00133"></a>00133 <span class="keywordflow">case</span> GL_LUMINANCE16:
<a name="l00134"></a>00134 <span class="keywordflow">case</span> GL_LUMINANCE16F_ARB:
<a name="l00135"></a>00135 <span class="keywordflow">case</span> GL_LUMINANCE32F_ARB:
<a name="l00136"></a>00136 <span class="keywordflow">return</span> 1;
<a name="l00137"></a>00137 <span class="keywordflow">case</span> 2:
<a name="l00138"></a>00138 <span class="keywordflow">case</span> GL_LUMINANCE_ALPHA:
<a name="l00139"></a>00139 <span class="keywordflow">case</span> GL_LUMINANCE4_ALPHA4:
<a name="l00140"></a>00140 <span class="keywordflow">case</span> GL_LUMINANCE12_ALPHA4:
<a name="l00141"></a>00141 <span class="keywordflow">case</span> GL_LUMINANCE8_ALPHA8:
<a name="l00142"></a>00142 <span class="keywordflow">case</span> GL_LUMINANCE6_ALPHA2:
<a name="l00143"></a>00143 <span class="keywordflow">case</span> GL_LUMINANCE12_ALPHA12:
<a name="l00144"></a>00144 <span class="keywordflow">case</span> GL_LUMINANCE16_ALPHA16:
<a name="l00145"></a>00145 <span class="keywordflow">case</span> GL_LUMINANCE_ALPHA16F_ARB:
<a name="l00146"></a>00146 <span class="keywordflow">case</span> GL_LUMINANCE_ALPHA32F_ARB:
<a name="l00147"></a>00147 <span class="keywordflow">return</span> 2;
<a name="l00148"></a>00148 <span class="keywordflow">case</span> 3:
<a name="l00149"></a>00149 <span class="keywordflow">case</span> GL_RGB:
<a name="l00150"></a>00150 <span class="keywordflow">case</span> GL_R3_G3_B2:
<a name="l00151"></a>00151 <span class="keywordflow">case</span> GL_RGB4:
<a name="l00152"></a>00152 <span class="keywordflow">case</span> GL_RGB5:
<a name="l00153"></a>00153 <span class="keywordflow">case</span> GL_RGB8:
<a name="l00154"></a>00154 <span class="keywordflow">case</span> GL_RGB10:
<a name="l00155"></a>00155 <span class="keywordflow">case</span> GL_RGB12:
<a name="l00156"></a>00156 <span class="keywordflow">case</span> GL_RGB16:
<a name="l00157"></a>00157 <span class="keywordflow">case</span> GL_RGB16F_ARB:
<a name="l00158"></a>00158 <span class="keywordflow">case</span> GL_RGB32F_ARB:
<a name="l00159"></a>00159 <span class="keywordflow">return</span> 3;
<a name="l00160"></a>00160 <span class="keywordflow">case</span> 4:
<a name="l00161"></a>00161 <span class="keywordflow">case</span> GL_RGBA:
<a name="l00162"></a>00162 <span class="keywordflow">case</span> GL_RGBA2:
<a name="l00163"></a>00163 <span class="keywordflow">case</span> GL_RGBA4:
<a name="l00164"></a>00164 <span class="keywordflow">case</span> GL_RGB5_A1:
<a name="l00165"></a>00165 <span class="keywordflow">case</span> GL_RGBA8:
<a name="l00166"></a>00166 <span class="keywordflow">case</span> GL_RGB10_A2:
<a name="l00167"></a>00167 <span class="keywordflow">case</span> GL_RGBA12:
<a name="l00168"></a>00168 <span class="keywordflow">case</span> GL_RGBA16:
<a name="l00169"></a>00169 <span class="keywordflow">case</span> GL_RGBA16F_ARB:
<a name="l00170"></a>00170 <span class="keywordflow">case</span> GL_RGBA32F_ARB:
<a name="l00171"></a>00171 <span class="keywordflow">return</span> 4;
<a name="l00172"></a>00172 <span class="keywordflow">default</span>:
<a name="l00173"></a>00173 <span class="keywordflow">return</span> 0;
<a name="l00174"></a>00174 }
<a name="l00175"></a>00175 }
<a name="l00176"></a>00176
<a name="l00177"></a>00177
<a name="l00178"></a>00178
<a name="l00179"></a>00179 <span class="comment">/* GLint __allegro_gl_get_texture_format_ex(BITMAP *bmp, int flags) */</span>
<a name="l00190"></a><a class="code" href="texture_8c.html#3669207f7e280178429393bd61f1172b">00190</a> GLint <a class="code" href="texture_8c.html#3669207f7e280178429393bd61f1172b">__allegro_gl_get_texture_format_ex</a>(BITMAP *bmp, <span class="keywordtype">int</span> flags) {
<a name="l00191"></a>00191
<a name="l00192"></a>00192 <span class="keywordflow">if</span> (!bmp) {
<a name="l00193"></a>00193 <span class="keywordflow">return</span> -1;
<a name="l00194"></a>00194 }
<a name="l00195"></a>00195
<a name="l00196"></a>00196 <span class="keywordflow">switch</span> (bitmap_color_depth(bmp)) {
<a name="l00197"></a>00197 <span class="keywordflow">case</span> 32:
<a name="l00198"></a>00198 <span class="keywordflow">if</span> (flags
<a name="l00199"></a>00199 & (<a class="code" href="group__texture.html#g8cc859eadf1610b424cd9188e716f432" title="Tell AllegroGL that the bitmap had an alpha channel, so it should be preserved when...">AGL_TEXTURE_HAS_ALPHA</a> | AGL_TEXTURE_FORCE_ALPHA_INTERNAL)) {
<a name="l00200"></a>00200 <span class="keywordflow">return</span> GL_RGBA8;
<a name="l00201"></a>00201 }
<a name="l00202"></a>00202 <span class="keywordflow">else</span> {
<a name="l00203"></a>00203 <span class="keywordflow">return</span> GL_RGB8;
<a name="l00204"></a>00204 }
<a name="l00205"></a>00205 <span class="keywordflow">case</span> 8:
<a name="l00206"></a>00206 <span class="keywordflow">return</span> GL_INTENSITY8;
<a name="l00207"></a>00207 <span class="keywordflow">case</span> 15:
<a name="l00208"></a>00208 <span class="keywordflow">if</span> (flags & AGL_TEXTURE_FORCE_ALPHA_INTERNAL) {
<a name="l00209"></a>00209 <span class="keywordflow">return</span> GL_RGB5_A1;
<a name="l00210"></a>00210 }
<a name="l00211"></a>00211 <span class="keywordflow">else</span> {
<a name="l00212"></a>00212 <span class="keywordflow">return</span> GL_RGB5;
<a name="l00213"></a>00213 }
<a name="l00214"></a>00214 <span class="keywordflow">case</span> 16:
<a name="l00215"></a>00215 <span class="keywordflow">case</span> 24:
<a name="l00216"></a>00216 <span class="keywordflow">if</span> (flags & AGL_TEXTURE_FORCE_ALPHA_INTERNAL) {
<a name="l00217"></a>00217 <span class="keywordflow">return</span> GL_RGBA8;
<a name="l00218"></a>00218 }
<a name="l00219"></a>00219 <span class="keywordflow">else</span> {
<a name="l00220"></a>00220 <span class="keywordflow">return</span> GL_RGB8;
<a name="l00221"></a>00221 }
<a name="l00222"></a>00222 <span class="keywordflow">default</span>:
<a name="l00223"></a>00223 <span class="keywordflow">return</span> -1;
<a name="l00224"></a>00224 }
<a name="l00225"></a>00225
<a name="l00226"></a>00226 <span class="keywordflow">return</span> -1;
<a name="l00227"></a>00227 }
<a name="l00228"></a>00228
<a name="l00229"></a>00229
<a name="l00230"></a>00230
<a name="l00231"></a>00231 <span class="comment">/* GLint allegro_gl_get_texture_format(BITMAP *bmp) */</span>
<a name="l00248"></a><a class="code" href="group__texture.html#g2392fe7a8dd6db65532160821804aa68">00248</a> GLint <a class="code" href="group__texture.html#g2392fe7a8dd6db65532160821804aa68" title="Returns the OpenGL internal texture format for this bitmap.">allegro_gl_get_texture_format</a>(BITMAP *bmp) {
<a name="l00249"></a>00249
<a name="l00250"></a>00250 <span class="keywordflow">if</span> (bmp && <a class="code" href="texture_8c.html#e804102a3d2bd8183b3b73c2b21dec1a">allegro_gl_opengl_internal_texture_format</a> == -1) {
<a name="l00251"></a>00251 <span class="keywordflow">return</span> <a class="code" href="texture_8c.html#3669207f7e280178429393bd61f1172b">__allegro_gl_get_texture_format_ex</a>(bmp,
<a name="l00252"></a>00252 <a class="code" href="texture_8c.html#4a21cbf7c33064409941c606e8ccda0a">__allegro_gl_use_alpha</a> ? AGL_TEXTURE_FORCE_ALPHA_INTERNAL : 0);
<a name="l00253"></a>00253 }
<a name="l00254"></a>00254
<a name="l00255"></a>00255 <span class="keywordflow">return</span> <a class="code" href="texture_8c.html#e804102a3d2bd8183b3b73c2b21dec1a">allegro_gl_opengl_internal_texture_format</a>;
<a name="l00256"></a>00256 }
<a name="l00257"></a>00257
<a name="l00258"></a>00258
<a name="l00259"></a>00259
<a name="l00260"></a>00260 <span class="comment">/* GLint allegro_gl_set_texture_format(GLint format) */</span>
<a name="l00282"></a><a class="code" href="group__texture.html#g5d535e8af776dd449cc4755b9e3585b1">00282</a> GLint <a class="code" href="group__texture.html#g5d535e8af776dd449cc4755b9e3585b1" title="Sets the color format you'd like OpenGL to use for its textures.">allegro_gl_set_texture_format</a>(GLint format) {
<a name="l00283"></a>00283
<a name="l00284"></a>00284 GLint old = <a class="code" href="texture_8c.html#e804102a3d2bd8183b3b73c2b21dec1a">allegro_gl_opengl_internal_texture_format</a>;
<a name="l00285"></a>00285 <a class="code" href="texture_8c.html#e804102a3d2bd8183b3b73c2b21dec1a">allegro_gl_opengl_internal_texture_format</a> = format;
<a name="l00286"></a>00286 <span class="keywordflow">return</span> old;
<a name="l00287"></a>00287 }
<a name="l00288"></a>00288
<a name="l00289"></a>00289
<a name="l00290"></a>00290
<a name="l00291"></a>00291 <span class="comment">/* GLenum __allegro_gl_get_bitmap_type(BITMAP *bmp, int flags) */</span>
<a name="l00311"></a><a class="code" href="texture_8c.html#2cef4a2942e811ed2029ac496f298b9b">00311</a> GLenum <a class="code" href="texture_8c.html#2cef4a2942e811ed2029ac496f298b9b">__allegro_gl_get_bitmap_type</a>(BITMAP *bmp, <span class="keywordtype">int</span> flags) {
<a name="l00312"></a>00312
<a name="l00313"></a>00313 <span class="keywordtype">int</span> c = bitmap_color_depth(bmp);
<a name="l00314"></a>00314
<a name="l00315"></a>00315 <span class="keywordflow">switch</span> (c) {
<a name="l00316"></a>00316
<a name="l00317"></a>00317 <span class="keywordflow">case</span> 8:
<a name="l00318"></a>00318 <span class="keywordflow">return</span> <a class="code" href="texture_8c.html#8416d9ed6c835ba6572ab1e29fe729f2">__allegro_gl_texture_read_format</a>[0];
<a name="l00319"></a>00319
<a name="l00320"></a>00320 <span class="keywordflow">case</span> 15:
<a name="l00321"></a>00321 <span class="keywordflow">return</span> <a class="code" href="texture_8c.html#8416d9ed6c835ba6572ab1e29fe729f2">__allegro_gl_texture_read_format</a>[1];
<a name="l00322"></a>00322
<a name="l00323"></a>00323 <span class="keywordflow">case</span> 16:
<a name="l00324"></a>00324 <span class="keywordflow">return</span> <a class="code" href="texture_8c.html#8416d9ed6c835ba6572ab1e29fe729f2">__allegro_gl_texture_read_format</a>[2];
<a name="l00325"></a>00325
<a name="l00326"></a>00326 <span class="keywordflow">case</span> 24:
<a name="l00327"></a>00327 <span class="keywordflow">return</span> <a class="code" href="texture_8c.html#8416d9ed6c835ba6572ab1e29fe729f2">__allegro_gl_texture_read_format</a>[3];
<a name="l00328"></a>00328
<a name="l00329"></a>00329 <span class="keywordflow">case</span> 32:
<a name="l00330"></a>00330 <span class="keywordflow">return</span> <a class="code" href="texture_8c.html#8416d9ed6c835ba6572ab1e29fe729f2">__allegro_gl_texture_read_format</a>[4];
<a name="l00331"></a>00331
<a name="l00332"></a>00332 <span class="keywordflow">default</span>:
<a name="l00333"></a>00333 TRACE(<a class="code" href="aglf_8c.html#8c04b6ea901068c5cc4020e9a18c0cbe">PREFIX_E</a> <span class="stringliteral">"get_bitmap_type: unhandled bitmap depth: %d\n"</span>,
<a name="l00334"></a>00334 c);
<a name="l00335"></a>00335 <span class="keywordflow">return</span> -1;
<a name="l00336"></a>00336 }
<a name="l00337"></a>00337 }
<a name="l00338"></a>00338
<a name="l00339"></a>00339
<a name="l00340"></a>00340
<a name="l00341"></a>00341 <span class="comment">/* GLenum __allegro_gl_get_bitmap_color_format(BITMAP *bmp, int flags) */</span>
<a name="l00355"></a><a class="code" href="texture_8c.html#e7375e040634b674f80f4bda0fcf83a4">00355</a> GLenum <a class="code" href="texture_8c.html#e7375e040634b674f80f4bda0fcf83a4">__allegro_gl_get_bitmap_color_format</a>(BITMAP *bmp, <span class="keywordtype">int</span> flags) {
<a name="l00356"></a>00356
<a name="l00357"></a>00357 <span class="keywordtype">int</span> c = bitmap_color_depth(bmp);
<a name="l00358"></a>00358
<a name="l00359"></a>00359 <span class="keywordflow">switch</span> (c) {
<a name="l00360"></a>00360
<a name="l00361"></a>00361 <span class="keywordflow">case</span> 8:
<a name="l00362"></a>00362 <span class="keywordflow">if</span> (flags & <a class="code" href="group__texture.html#gd67cfdfd21ef2cae75b03cb871e57f4a" title="Tell AllegroGL that the specified BITMAP is an 8-bpp alpha-only BITMAP.">AGL_TEXTURE_ALPHA_ONLY</a>) {
<a name="l00363"></a>00363 <span class="keywordflow">return</span> GL_ALPHA;
<a name="l00364"></a>00364 }
<a name="l00365"></a>00365 <span class="keywordflow">else</span> {
<a name="l00366"></a>00366 <span class="keywordflow">return</span> <a class="code" href="texture_8c.html#7e74a22ac957103e91218377585b1b76">__allegro_gl_texture_components</a>[0];
<a name="l00367"></a>00367 }
<a name="l00368"></a>00368
<a name="l00369"></a>00369 <span class="keywordflow">case</span> 15:
<a name="l00370"></a>00370 <span class="keywordflow">if</span> (flags & AGL_TEXTURE_FORCE_ALPHA_INTERNAL) {
<a name="l00371"></a>00371 <span class="keywordflow">return</span> GL_RGBA;
<a name="l00372"></a>00372 }
<a name="l00373"></a>00373 <span class="keywordflow">else</span> {
<a name="l00374"></a>00374 <span class="keywordflow">return</span> <a class="code" href="texture_8c.html#7e74a22ac957103e91218377585b1b76">__allegro_gl_texture_components</a>[1];
<a name="l00375"></a>00375 }
<a name="l00376"></a>00376
<a name="l00377"></a>00377 <span class="keywordflow">case</span> 16:
<a name="l00378"></a>00378 <span class="keywordflow">return</span> <a class="code" href="texture_8c.html#7e74a22ac957103e91218377585b1b76">__allegro_gl_texture_components</a>[2];
<a name="l00379"></a>00379
<a name="l00380"></a>00380 <span class="keywordflow">case</span> 24:
<a name="l00381"></a>00381 <span class="keywordflow">return</span> <a class="code" href="texture_8c.html#7e74a22ac957103e91218377585b1b76">__allegro_gl_texture_components</a>[3];
<a name="l00382"></a>00382
<a name="l00383"></a>00383 <span class="keywordflow">case</span> 32:
<a name="l00384"></a>00384 <span class="keywordflow">if</span> (flags & (<a class="code" href="group__texture.html#g8cc859eadf1610b424cd9188e716f432" title="Tell AllegroGL that the bitmap had an alpha channel, so it should be preserved when...">AGL_TEXTURE_HAS_ALPHA</a>
<a name="l00385"></a>00385 | AGL_TEXTURE_FORCE_ALPHA_INTERNAL)) {
<a name="l00386"></a>00386 <span class="keywordflow">return</span> GL_RGBA;
<a name="l00387"></a>00387 }
<a name="l00388"></a>00388 <span class="keywordflow">else</span> {
<a name="l00389"></a>00389 <span class="keywordflow">return</span> <a class="code" href="texture_8c.html#7e74a22ac957103e91218377585b1b76">__allegro_gl_texture_components</a>[4];
<a name="l00390"></a>00390 }
<a name="l00391"></a>00391
<a name="l00392"></a>00392 <span class="keywordflow">default</span>:
<a name="l00393"></a>00393 TRACE(<a class="code" href="aglf_8c.html#8c04b6ea901068c5cc4020e9a18c0cbe">PREFIX_E</a> <span class="stringliteral">"get_bitmap_color_format: unhandled bitmap "</span>
<a name="l00394"></a>00394 <span class="stringliteral">"depth: %d\n"</span>, c);
<a name="l00395"></a>00395 <span class="keywordflow">return</span> -1;
<a name="l00396"></a>00396 }
<a name="l00397"></a>00397 }
<a name="l00398"></a>00398
<a name="l00399"></a>00399
<a name="l00400"></a>00400
<a name="l00401"></a>00401 <span class="comment">/* int allegro_gl_use_mipmapping(int enable) */</span>
<a name="l00415"></a><a class="code" href="group__texture.html#gb5393ecc10a2a31da7eb80c889af89ac">00415</a> <span class="keywordtype">int</span> <a class="code" href="group__texture.html#gb5393ecc10a2a31da7eb80c889af89ac" title="Tell AllegroGL to use Mipmapping or not when generating textures via its functions...">allegro_gl_use_mipmapping</a>(<span class="keywordtype">int</span> enable) {
<a name="l00416"></a>00416
<a name="l00417"></a>00417 <span class="keywordtype">int</span> old = <a class="code" href="texture_8c.html#009ebd92a478864b1fdd5eeeb3df5f38">allegro_gl_use_mipmapping_for_textures</a>;
<a name="l00418"></a>00418 <a class="code" href="texture_8c.html#009ebd92a478864b1fdd5eeeb3df5f38">allegro_gl_use_mipmapping_for_textures</a> = enable;
<a name="l00419"></a>00419 <span class="keywordflow">return</span> old;
<a name="l00420"></a>00420 }
<a name="l00421"></a>00421
<a name="l00422"></a>00422
<a name="l00423"></a>00423
<a name="l00424"></a>00424 <span class="comment">/* int allegro_gl_use_alpha_channel(int enable) */</span>
<a name="l00439"></a><a class="code" href="group__texture.html#g1d88f4ebc7ed1ecd65640b72ea46a71e">00439</a> <span class="keywordtype">int</span> <a class="code" href="group__texture.html#g1d88f4ebc7ed1ecd65640b72ea46a71e" title="Tell AllegroGL to use Alpha channel or not when generating textures via its functions...">allegro_gl_use_alpha_channel</a>(<span class="keywordtype">int</span> enable) {
<a name="l00440"></a>00440
<a name="l00441"></a>00441 <span class="keywordtype">int</span> old = <a class="code" href="texture_8c.html#4a21cbf7c33064409941c606e8ccda0a">__allegro_gl_use_alpha</a>;
<a name="l00442"></a>00442 <a class="code" href="texture_8c.html#4a21cbf7c33064409941c606e8ccda0a">__allegro_gl_use_alpha</a> = enable;
<a name="l00443"></a>00443 <span class="keywordflow">return</span> old;
<a name="l00444"></a>00444 }
<a name="l00445"></a>00445
<a name="l00446"></a>00446
<a name="l00447"></a>00447
<a name="l00448"></a>00448 <span class="comment">/* int allegro_gl_flip_texture(int enable) */</span>
<a name="l00464"></a><a class="code" href="group__texture.html#g3ec0a1c4c6656f13c8398bab7a1293f2">00464</a> <span class="keywordtype">int</span> <a class="code" href="group__texture.html#g3ec0a1c4c6656f13c8398bab7a1293f2" title="Tell AllegroGL to flip the texture vertically or not when generating textures via...">allegro_gl_flip_texture</a>(<span class="keywordtype">int</span> enable) {
<a name="l00465"></a>00465
<a name="l00466"></a>00466 <span class="keywordtype">int</span> old = <a class="code" href="texture_8c.html#7e34e2c7cae7e9bb9ad7ddc130db47fb">__allegro_gl_flip_texture</a>;
<a name="l00467"></a>00467 <a class="code" href="texture_8c.html#7e34e2c7cae7e9bb9ad7ddc130db47fb">__allegro_gl_flip_texture</a> = enable;
<a name="l00468"></a>00468 <span class="keywordflow">return</span> old;
<a name="l00469"></a>00469 }
<a name="l00470"></a>00470
<a name="l00471"></a>00471
<a name="l00472"></a>00472
<a name="l00473"></a>00473 <span class="comment">/* int allegro_gl_check_texture_ex(int flags, BITMAP *bmp, GLuint internal_format) */</span>
<a name="l00495"></a><a class="code" href="group__texture.html#gb0cf4dc0ddcb45f5b067d08aed1c88e6">00495</a> <span class="keywordtype">int</span> <a class="code" href="group__texture.html#gb0cf4dc0ddcb45f5b067d08aed1c88e6" title="Checks whether the specified bitmap is of the proper size for texturing.">allegro_gl_check_texture_ex</a>(<span class="keywordtype">int</span> flags, BITMAP *bmp,
<a name="l00496"></a>00496 GLint internal_format) {
<a name="l00497"></a>00497
<a name="l00498"></a>00498 <span class="keywordflow">return</span> (<a class="code" href="group__texture.html#gf3a48c555068e7051171255c1011150a" title="Uploads an Allegro BITMAP to the GL driver as a texture.">allegro_gl_make_texture_ex</a>(flags | AGL_TEXTURE_CHECK_VALID_INTERNAL,
<a name="l00499"></a>00499 bmp, internal_format) ? TRUE : FALSE);
<a name="l00500"></a>00500 }
<a name="l00501"></a>00501
<a name="l00502"></a>00502
<a name="l00503"></a>00503
<a name="l00504"></a>00504 <span class="comment">/* Convert flags from pre-0.2.0 to 0.2.0+ */</span>
<a name="l00505"></a><a class="code" href="texture_8c.html#7a823b9566f7171bb186ed9e55943fbc">00505</a> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="texture_8c.html#7a823b9566f7171bb186ed9e55943fbc">__allegro_gl_convert_flags</a>(<span class="keywordtype">int</span> flags) {
<a name="l00506"></a>00506
<a name="l00507"></a>00507 flags |= <a class="code" href="group__texture.html#ga8b7246edc7ec019ec3b434eb0cacdf2" title="Tell AllegroGL to allow rescaling of the bitmap.">AGL_TEXTURE_RESCALE</a>;
<a name="l00508"></a>00508
<a name="l00509"></a>00509 <span class="keywordflow">if</span> (<a class="code" href="texture_8c.html#009ebd92a478864b1fdd5eeeb3df5f38">allegro_gl_use_mipmapping_for_textures</a>) {
<a name="l00510"></a>00510 flags |= <a class="code" href="group__texture.html#gbaf179e577a9328a751e92e3603f0746" title="AllegroGL will generate mipmaps for this texture.">AGL_TEXTURE_MIPMAP</a>;
<a name="l00511"></a>00511 }
<a name="l00512"></a>00512 <span class="keywordflow">if</span> (<a class="code" href="texture_8c.html#4a21cbf7c33064409941c606e8ccda0a">__allegro_gl_use_alpha</a>) {
<a name="l00513"></a>00513 flags |= <a class="code" href="group__texture.html#g8cc859eadf1610b424cd9188e716f432" title="Tell AllegroGL that the bitmap had an alpha channel, so it should be preserved when...">AGL_TEXTURE_HAS_ALPHA</a>;
<a name="l00514"></a>00514 }
<a name="l00515"></a>00515 <span class="keywordflow">if</span> (<a class="code" href="texture_8c.html#7e34e2c7cae7e9bb9ad7ddc130db47fb">__allegro_gl_flip_texture</a>) {
<a name="l00516"></a>00516 flags |= <a class="code" href="group__texture.html#gdeffe4feb290278035beacedb284a010" title="Flip the texture on the x-axis.">AGL_TEXTURE_FLIP</a>;
<a name="l00517"></a>00517 }
<a name="l00518"></a>00518
<a name="l00519"></a>00519 <span class="keywordflow">if</span> (<a class="code" href="texture_8c.html#e804102a3d2bd8183b3b73c2b21dec1a">allegro_gl_opengl_internal_texture_format</a> == GL_ALPHA4
<a name="l00520"></a>00520 || <a class="code" href="texture_8c.html#e804102a3d2bd8183b3b73c2b21dec1a">allegro_gl_opengl_internal_texture_format</a> == GL_ALPHA8
<a name="l00521"></a>00521 || <a class="code" href="texture_8c.html#e804102a3d2bd8183b3b73c2b21dec1a">allegro_gl_opengl_internal_texture_format</a> == GL_ALPHA12
<a name="l00522"></a>00522 || <a class="code" href="texture_8c.html#e804102a3d2bd8183b3b73c2b21dec1a">allegro_gl_opengl_internal_texture_format</a> == GL_ALPHA16
<a name="l00523"></a>00523 || <a class="code" href="texture_8c.html#e804102a3d2bd8183b3b73c2b21dec1a">allegro_gl_opengl_internal_texture_format</a> == GL_ALPHA
<a name="l00524"></a>00524 || <a class="code" href="texture_8c.html#e804102a3d2bd8183b3b73c2b21dec1a">allegro_gl_opengl_internal_texture_format</a> == GL_INTENSITY4
<a name="l00525"></a>00525 || <a class="code" href="texture_8c.html#e804102a3d2bd8183b3b73c2b21dec1a">allegro_gl_opengl_internal_texture_format</a> == GL_INTENSITY8
<a name="l00526"></a>00526 || <a class="code" href="texture_8c.html#e804102a3d2bd8183b3b73c2b21dec1a">allegro_gl_opengl_internal_texture_format</a> == GL_INTENSITY12
<a name="l00527"></a>00527 || <a class="code" href="texture_8c.html#e804102a3d2bd8183b3b73c2b21dec1a">allegro_gl_opengl_internal_texture_format</a> == GL_INTENSITY16
<a name="l00528"></a>00528 || <a class="code" href="texture_8c.html#e804102a3d2bd8183b3b73c2b21dec1a">allegro_gl_opengl_internal_texture_format</a> == GL_INTENSITY
<a name="l00529"></a>00529 || <a class="code" href="texture_8c.html#e804102a3d2bd8183b3b73c2b21dec1a">allegro_gl_opengl_internal_texture_format</a> == 1) {
<a name="l00530"></a>00530 flags |= <a class="code" href="group__texture.html#gd67cfdfd21ef2cae75b03cb871e57f4a" title="Tell AllegroGL that the specified BITMAP is an 8-bpp alpha-only BITMAP.">AGL_TEXTURE_ALPHA_ONLY</a>;
<a name="l00531"></a>00531 }
<a name="l00532"></a>00532
<a name="l00533"></a>00533 <span class="keywordflow">return</span> flags;
<a name="l00534"></a>00534 }
<a name="l00535"></a>00535
<a name="l00536"></a>00536
<a name="l00537"></a>00537
<a name="l00538"></a>00538 <span class="comment">/* int allegro_gl_check_texture(BITMAP *bmp) */</span>
<a name="l00557"></a><a class="code" href="group__texture.html#g6996c14538e18b1614f91d34b2d4d691">00557</a> <span class="keywordtype">int</span> <a class="code" href="group__texture.html#g6996c14538e18b1614f91d34b2d4d691" title="Checks whether the specified bitmap is of the proper size for texturing.">allegro_gl_check_texture</a>(BITMAP *bmp) {
<a name="l00558"></a>00558
<a name="l00559"></a>00559 <span class="keywordtype">int</span> flags = <a class="code" href="texture_8c.html#7a823b9566f7171bb186ed9e55943fbc">__allegro_gl_convert_flags</a>(0);
<a name="l00560"></a>00560
<a name="l00561"></a>00561 <span class="keywordflow">return</span> <a class="code" href="group__texture.html#gb0cf4dc0ddcb45f5b067d08aed1c88e6" title="Checks whether the specified bitmap is of the proper size for texturing.">allegro_gl_check_texture_ex</a>(flags, bmp,
<a name="l00562"></a>00562 <a class="code" href="texture_8c.html#e804102a3d2bd8183b3b73c2b21dec1a">allegro_gl_opengl_internal_texture_format</a>);
<a name="l00563"></a>00563 }
<a name="l00564"></a>00564
<a name="l00565"></a>00565
<a name="l00566"></a>00566
<a name="l00567"></a>00567 <span class="comment">/* Integer log2 function. Not optimized for speed. */</span>
<a name="l00568"></a><a class="code" href="texture_8c.html#df4037de25874c6c39f5edf9790feb8b">00568</a> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="texture_8c.html#df4037de25874c6c39f5edf9790feb8b">log2i</a>(<span class="keywordtype">int</span> n) {
<a name="l00569"></a>00569
<a name="l00570"></a>00570 <span class="keywordtype">int</span> k;
<a name="l00571"></a>00571
<a name="l00572"></a>00572 <span class="keywordflow">if</span> (n < 1) {
<a name="l00573"></a>00573 <span class="keywordflow">return</span> -1;
<a name="l00574"></a>00574 }
<a name="l00575"></a>00575
<a name="l00576"></a>00576 k = 0;
<a name="l00577"></a>00577 <span class="keywordflow">while</span> (n >>= 1) {
<a name="l00578"></a>00578 k++;
<a name="l00579"></a>00579 }
<a name="l00580"></a>00580
<a name="l00581"></a>00581 <span class="keywordflow">return</span> k;
<a name="l00582"></a>00582 }
<a name="l00583"></a>00583
<a name="l00584"></a>00584
<a name="l00585"></a>00585
<a name="l00586"></a>00586 <span class="comment">/* BITMAP *__allegro_gl_munge_bitmap(int flags, BITMAP *bmp, GLint *type, GLint *format) */</span>
<a name="l00596"></a><a class="code" href="texture_8c.html#1820c681297583935ca97ea9e1d032e6">00596</a> BITMAP *<a class="code" href="texture_8c.html#1820c681297583935ca97ea9e1d032e6">__allegro_gl_munge_bitmap</a>(<span class="keywordtype">int</span> flags, BITMAP *bmp, <span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y,
<a name="l00597"></a>00597 <span class="keywordtype">int</span> w, <span class="keywordtype">int</span> h, GLint *type, GLint *format) {
<a name="l00598"></a>00598
<a name="l00599"></a>00599 BITMAP *ret = 0, *temp = 0;
<a name="l00600"></a>00600
<a name="l00601"></a>00601 <span class="keywordtype">int</span> need_rescale = 0;
<a name="l00602"></a>00602 <span class="keywordtype">int</span> need_alpha = 0;
<a name="l00603"></a>00603 <span class="keywordtype">int</span> need_flip = 0;
<a name="l00604"></a>00604 <span class="keywordtype">int</span> depth = bitmap_color_depth(bmp);
<a name="l00605"></a>00605 <span class="keywordtype">int</span> force_copy = 0;
<a name="l00606"></a>00606
<a name="l00607"></a>00607 <span class="keyword">const</span> <span class="keywordtype">int</span> old_w = w, old_h = h;
<a name="l00608"></a>00608
<a name="l00609"></a>00609 <span class="keywordflow">if</span> (flags & <a class="code" href="group__texture.html#ga8b7246edc7ec019ec3b434eb0cacdf2" title="Tell AllegroGL to allow rescaling of the bitmap.">AGL_TEXTURE_RESCALE</a>) {
<a name="l00610"></a>00610
<a name="l00611"></a>00611 <span class="comment">/* Check if rescaling is needed */</span>
<a name="l00612"></a>00612
<a name="l00613"></a>00613 <span class="comment">/* NP2 is not supported, and the texture isn't a power-of-two.</span>
<a name="l00614"></a>00614 <span class="comment"> * Resize the next power of 2</span>
<a name="l00615"></a>00615 <span class="comment"> */</span>
<a name="l00616"></a>00616 <span class="keywordflow">if</span> (!<a class="code" href="group__extensions.html#g7492f6f6acc608789210560ee63e5436" title="List of OpenGL extensions supported by AllegroGL.">allegro_gl_extensions_GL</a>.ARB_texture_non_power_of_two
<a name="l00617"></a>00617 && ((w & (w - 1)) || (h & (h - 1)))) {
<a name="l00618"></a>00618 w = <a class="code" href="group__glvtable.html#gf2dd739125f0ca84ac9c68263b4266f2">__allegro_gl_make_power_of_2</a>(w);
<a name="l00619"></a>00619 h = <a class="code" href="group__glvtable.html#gf2dd739125f0ca84ac9c68263b4266f2">__allegro_gl_make_power_of_2</a>(h);
<a name="l00620"></a>00620 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"munge_bitmap: Rescaling bitmap from "</span>
<a name="l00621"></a>00621 <span class="stringliteral">"%ix%i to %ix%i due to non-power-of-2 source size.\n"</span>,
<a name="l00622"></a>00622 old_w, old_h, w, h);
<a name="l00623"></a>00623 need_rescale = 1;
<a name="l00624"></a>00624 }
<a name="l00625"></a>00625
<a name="l00626"></a>00626 <span class="comment">/* Don't go over the max texture size */</span>
<a name="l00627"></a>00627 <span class="keywordflow">if</span> (w > <a class="code" href="structallegro__gl__info.html">allegro_gl_info</a>.max_texture_size) {
<a name="l00628"></a>00628 w = <a class="code" href="structallegro__gl__info.html">allegro_gl_info</a>.max_texture_size;
<a name="l00629"></a>00629 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"munge_bitmap: Rescaling bitmap from "</span>
<a name="l00630"></a>00630 <span class="stringliteral">"%ix%i to %ix%i due to max supported size exceed.\n"</span>,
<a name="l00631"></a>00631 old_w, old_h, w, h);
<a name="l00632"></a>00632 need_rescale = 1;
<a name="l00633"></a>00633 }
<a name="l00634"></a>00634
<a name="l00635"></a>00635 <span class="keywordflow">if</span> (h > <a class="code" href="structallegro__gl__info.html">allegro_gl_info</a>.max_texture_size) {
<a name="l00636"></a>00636 h = <a class="code" href="structallegro__gl__info.html">allegro_gl_info</a>.max_texture_size;
<a name="l00637"></a>00637 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"munge_bitmap: Rescaling bitmap from "</span>
<a name="l00638"></a>00638 <span class="stringliteral">"%ix%i to %ix%i due to max supported size exceed.\n"</span>,
<a name="l00639"></a>00639 old_w, old_h, w, h);
<a name="l00640"></a>00640 need_rescale = 1;
<a name="l00641"></a>00641 }
<a name="l00642"></a>00642
<a name="l00643"></a>00643 <span class="comment">/* Voodoos don't support mipmaps for textures greater than 32x32.</span>
<a name="l00644"></a>00644 <span class="comment"> * If we're allowed to rescale, rescale the bitmap to 32x32.</span>
<a name="l00645"></a>00645 <span class="comment"> * XXX <rohannessian> Apparently, this is a bug in one version</span>
<a name="l00646"></a>00646 <span class="comment"> * of the Voodoo GL driver. Need to figure out a workaround</span>
<a name="l00647"></a>00647 <span class="comment"> * for that.</span>
<a name="l00648"></a>00648 <span class="comment"> */</span>
<a name="l00649"></a>00649 <span class="keywordflow">if</span> (<a class="code" href="structallegro__gl__info.html">allegro_gl_info</a>.is_voodoo && (flags & <a class="code" href="group__texture.html#gbaf179e577a9328a751e92e3603f0746" title="AllegroGL will generate mipmaps for this texture.">AGL_TEXTURE_MIPMAP</a>)
<a name="l00650"></a>00650 && (w > 32 || h > 32)) {
<a name="l00651"></a>00651
<a name="l00652"></a>00652 w = MIN(32, w);
<a name="l00653"></a>00653 h = MIN(32, h);
<a name="l00654"></a>00654
<a name="l00655"></a>00655 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"munge_bitmap: Rescaling bitmap from "</span>
<a name="l00656"></a>00656 <span class="stringliteral">"%ix%i to %ix%i due to Voodoo driver bug.\n"</span>,
<a name="l00657"></a>00657 old_w, old_h, w, h);
<a name="l00658"></a>00658 need_rescale = 1;
<a name="l00659"></a>00659 }
<a name="l00660"></a>00660 }
<a name="l00661"></a>00661
<a name="l00662"></a>00662 <span class="comment">/* Matrox G200 cards have a bug where rectangular textures can't have</span>
<a name="l00663"></a>00663 <span class="comment"> * more than 4 levels of mipmaps (max_mip == 3). This doesn't seem</span>
<a name="l00664"></a>00664 <span class="comment"> * to affect square textures.</span>
<a name="l00665"></a>00665 <span class="comment"> *</span>
<a name="l00666"></a>00666 <span class="comment"> * Note: Using GLU to build the mipmaps seems to work. Maybe AGL is</span>
<a name="l00667"></a>00667 <span class="comment"> * doing something wrong?</span>
<a name="l00668"></a>00668 <span class="comment"> *</span>
<a name="l00669"></a>00669 <span class="comment"> * Workaround: Use GLU to build the mipmaps, and force depth to 24 or</span>
<a name="l00670"></a>00670 <span class="comment"> * 32.</span>
<a name="l00671"></a>00671 <span class="comment"> */</span>
<a name="l00672"></a>00672 <span class="keywordflow">if</span> ( <a class="code" href="structallegro__gl__info.html">allegro_gl_info</a>.is_matrox_g200 && (flags & <a class="code" href="group__texture.html#gbaf179e577a9328a751e92e3603f0746" title="AllegroGL will generate mipmaps for this texture.">AGL_TEXTURE_MIPMAP</a>)) {
<a name="l00673"></a>00673 <span class="keywordtype">int</span> wl = <a class="code" href="texture_8c.html#df4037de25874c6c39f5edf9790feb8b">log2i</a>(w);
<a name="l00674"></a>00674 <span class="keywordtype">int</span> hl = <a class="code" href="texture_8c.html#df4037de25874c6c39f5edf9790feb8b">log2i</a>(h);
<a name="l00675"></a>00675
<a name="l00676"></a>00676 <span class="keywordflow">if</span> (w != h && MAX(wl, hl) > 3 && depth < 24
<a name="l00677"></a>00677 && !(flags & <a class="code" href="group__texture.html#gd67cfdfd21ef2cae75b03cb871e57f4a" title="Tell AllegroGL that the specified BITMAP is an 8-bpp alpha-only BITMAP.">AGL_TEXTURE_ALPHA_ONLY</a>)) {
<a name="l00678"></a>00678 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"munge_bitmap: G200 path in use.\n"</span>);
<a name="l00679"></a>00679 depth = 24;
<a name="l00680"></a>00680 }
<a name="l00681"></a>00681 }
<a name="l00682"></a>00682
<a name="l00683"></a>00683 <span class="comment">/* Do we need to flip the texture on the t axis? */</span>
<a name="l00684"></a>00684 <span class="keywordflow">if</span> (flags & <a class="code" href="group__texture.html#gdeffe4feb290278035beacedb284a010" title="Flip the texture on the x-axis.">AGL_TEXTURE_FLIP</a>) {
<a name="l00685"></a>00685 need_flip = 1;
<a name="l00686"></a>00686 }
<a name="l00687"></a>00687
<a name="l00688"></a>00688
<a name="l00689"></a>00689 <span class="comment">/* If not supported, blit to a 24 bpp bitmap and try again</span>
<a name="l00690"></a>00690 <span class="comment"> */</span>
<a name="l00691"></a>00691 <span class="keywordflow">if</span> (*type == -1) {
<a name="l00692"></a>00692 TRACE(<a class="code" href="fontconv_8c.html#d8bfd440530d371de892a20efd3bbc2a">PREFIX_W</a> <span class="stringliteral">"munge_bitmap: using temporary 24bpp bitmap\n"</span>);
<a name="l00693"></a>00693 depth = 24;
<a name="l00694"></a>00694 }
<a name="l00695"></a>00695
<a name="l00696"></a>00696 <span class="comment">/* We need a texture that can be used for masked blits.</span>
<a name="l00697"></a>00697 <span class="comment"> * Insert an alpha channel if one is not there.</span>
<a name="l00698"></a>00698 <span class="comment"> * If it's already there, replace it by 0/1 as needed.</span>
<a name="l00699"></a>00699 <span class="comment"> */</span>
<a name="l00700"></a>00700 <span class="keywordflow">if</span> ((flags & <a class="code" href="group__texture.html#gba184d573c65f33b35d1d57936607d08" title="Generate an alpha channel for this texture, based on the Allegro mask color.">AGL_TEXTURE_MASKED</a>) && !(flags & <a class="code" href="group__texture.html#gd67cfdfd21ef2cae75b03cb871e57f4a" title="Tell AllegroGL that the specified BITMAP is an 8-bpp alpha-only BITMAP.">AGL_TEXTURE_ALPHA_ONLY</a>)) {
<a name="l00701"></a>00701 need_alpha = 1;
<a name="l00702"></a>00702
<a name="l00703"></a>00703 <span class="keywordflow">switch</span> (depth) {
<a name="l00704"></a>00704 <span class="keywordflow">case</span> 15:
<a name="l00705"></a>00705 <span class="keywordflow">if</span> (!<a class="code" href="group__extensions.html#g7492f6f6acc608789210560ee63e5436" title="List of OpenGL extensions supported by AllegroGL.">allegro_gl_extensions_GL</a>.EXT_packed_pixels) {
<a name="l00706"></a>00706 depth = 32;
<a name="l00707"></a>00707 }
<a name="l00708"></a>00708 <span class="keywordflow">break</span>;
<a name="l00709"></a>00709 <span class="keywordflow">case</span> 8:
<a name="l00710"></a>00710 <span class="keywordflow">case</span> 16:
<a name="l00711"></a>00711 <span class="keywordflow">case</span> 24:
<a name="l00712"></a>00712 <span class="keywordflow">case</span> 32:
<a name="l00713"></a>00713 depth = 32;
<a name="l00714"></a>00714 <span class="keywordflow">break</span>;
<a name="l00715"></a>00715 }
<a name="l00716"></a>00716 force_copy = 1;
<a name="l00717"></a>00717 }
<a name="l00718"></a>00718
<a name="l00719"></a>00719 <span class="comment">/* Allegro fills in 0 for the alpha channel. Matrox G200 seems to ignore</span>
<a name="l00720"></a>00720 <span class="comment"> * the internal format; so we need to drop down to 24-bpp if no alpha</span>
<a name="l00721"></a>00721 <span class="comment"> * will be needed.</span>
<a name="l00722"></a>00722 <span class="comment"> */</span>
<a name="l00723"></a>00723 <span class="keywordflow">if</span> (<a class="code" href="structallegro__gl__info.html">allegro_gl_info</a>.is_matrox_g200 && !(flags & AGL_TEXTURE_MASKED)
<a name="l00724"></a>00724 && !(flags & <a class="code" href="group__texture.html#g8cc859eadf1610b424cd9188e716f432" title="Tell AllegroGL that the bitmap had an alpha channel, so it should be preserved when...">AGL_TEXTURE_HAS_ALPHA</a>) && depth == 32) {
<a name="l00725"></a>00725 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"munge_bitmap: G200 path in use.\n"</span>);
<a name="l00726"></a>00726 depth = 24;
<a name="l00727"></a>00727 force_copy = 1;
<a name="l00728"></a>00728 }
<a name="l00729"></a>00729
<a name="l00730"></a>00730
<a name="l00731"></a>00731 <span class="comment">/* Do we need to do a color depth conversion or bitmap copy? */</span>
<a name="l00732"></a>00732 <span class="keywordflow">if</span> (depth != bitmap_color_depth(bmp) || force_copy) {
<a name="l00733"></a>00733
<a name="l00734"></a>00734 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"munge_bitmap: Need to perform depth conversion from %i "</span>
<a name="l00735"></a>00735 <span class="stringliteral">"to %i bpp.\n"</span>, bitmap_color_depth(bmp), depth);
<a name="l00736"></a>00736
<a name="l00737"></a>00737 temp = create_bitmap_ex(depth, bmp->w, bmp->h);
<a name="l00738"></a>00738
<a name="l00739"></a>00739 <span class="keywordflow">if</span> (!temp) {
<a name="l00740"></a>00740 TRACE(<a class="code" href="aglf_8c.html#8c04b6ea901068c5cc4020e9a18c0cbe">PREFIX_E</a> <span class="stringliteral">"munge_bitmap: Unable to create temporary bitmap "</span>
<a name="l00741"></a>00741 <span class="stringliteral">"%ix%ix%i\n"</span>, bmp->w, bmp->h, depth);
<a name="l00742"></a>00742 <span class="keywordflow">return</span> NULL;
<a name="l00743"></a>00743 }
<a name="l00744"></a>00744
<a name="l00745"></a>00745 <span class="comment">/* XXX <rohannessian> Use palette conversion?</span>
<a name="l00746"></a>00746 <span class="comment"> */</span>
<a name="l00747"></a>00747 <span class="keywordflow">if</span> (bitmap_color_depth(bmp) == 8 && depth > 8) {
<a name="l00748"></a>00748 <span class="keywordtype">int</span> i, j;
<a name="l00749"></a>00749 <span class="keywordflow">for</span> (j = 0; j < bmp->h; j++) {
<a name="l00750"></a>00750 <span class="keywordflow">for</span> (i = 0; i < bmp->w; i++) {
<a name="l00751"></a>00751 <span class="keywordtype">int</span> c = _getpixel(bmp, i, j);
<a name="l00752"></a>00752 putpixel(temp, i, j, makecol_depth(depth, c, c, c));
<a name="l00753"></a>00753 }
<a name="l00754"></a>00754 }
<a name="l00755"></a>00755 }
<a name="l00756"></a>00756 <span class="keywordflow">else</span> {
<a name="l00757"></a>00757 blit(bmp, temp, 0, 0, 0, 0, bmp->w, bmp->h);
<a name="l00758"></a>00758 }
<a name="l00759"></a>00759 bmp = temp;
<a name="l00760"></a>00760
<a name="l00761"></a>00761 *format = <a class="code" href="texture_8c.html#e7375e040634b674f80f4bda0fcf83a4">__allegro_gl_get_bitmap_color_format</a>(bmp, flags);
<a name="l00762"></a>00762 *type = <a class="code" href="texture_8c.html#2cef4a2942e811ed2029ac496f298b9b">__allegro_gl_get_bitmap_type</a>(bmp, flags);
<a name="l00763"></a>00763 }
<a name="l00764"></a>00764
<a name="l00765"></a>00765
<a name="l00766"></a>00766
<a name="l00767"></a>00767 <span class="comment">/* Nothing to do? */</span>
<a name="l00768"></a>00768 <span class="keywordflow">if</span> (!need_rescale && !need_alpha && !need_flip) {
<a name="l00769"></a>00769
<a name="l00770"></a>00770 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"munge_bitmap: No need for munging - returning %p\n"</span>,
<a name="l00771"></a>00771 temp);
<a name="l00772"></a>00772
<a name="l00773"></a>00773 <span class="comment">/* Return depth-converte bitmap, if present */</span>
<a name="l00774"></a>00774 <span class="keywordflow">if</span> (temp) {
<a name="l00775"></a>00775 <span class="keywordflow">return</span> temp;
<a name="l00776"></a>00776 }
<a name="l00777"></a>00777 <span class="keywordflow">return</span> NULL;
<a name="l00778"></a>00778 }
<a name="l00779"></a>00779
<a name="l00780"></a>00780 ret = create_bitmap_ex(depth, w, h);
<a name="l00781"></a>00781
<a name="l00782"></a>00782 <span class="keywordflow">if</span> (!ret) {
<a name="l00783"></a>00783 TRACE(<a class="code" href="aglf_8c.html#8c04b6ea901068c5cc4020e9a18c0cbe">PREFIX_E</a> <span class="stringliteral">"munge_bitmap: Unable to create result bitmap "</span>
<a name="l00784"></a>00784 <span class="stringliteral">"%ix%ix%i\n"</span>, w, h, depth);
<a name="l00785"></a>00785 <span class="keywordflow">goto</span> error;
<a name="l00786"></a>00786 }
<a name="l00787"></a>00787
<a name="l00788"></a>00788
<a name="l00789"></a>00789 <span class="comment">/* No need to fill in bitmap if we're just making a query */</span>
<a name="l00790"></a>00790 <span class="keywordflow">if</span> (flags & AGL_TEXTURE_CHECK_VALID_INTERNAL) {
<a name="l00791"></a>00791 <span class="keywordflow">if</span> (temp) {
<a name="l00792"></a>00792 destroy_bitmap(temp);
<a name="l00793"></a>00793 }
<a name="l00794"></a>00794 <span class="keywordflow">return</span> ret;
<a name="l00795"></a>00795 }
<a name="l00796"></a>00796
<a name="l00797"></a>00797
<a name="l00798"></a>00798 <span class="comment">/* Perform flip</span>
<a name="l00799"></a>00799 <span class="comment"> * I don't want to have to deal with *yet another* temporary bitmap</span>
<a name="l00800"></a>00800 <span class="comment"> * so instead, I fugde the line pointers around.</span>
<a name="l00801"></a>00801 <span class="comment"> * This will work because we require Allegro memory bitmaps anyway.</span>
<a name="l00802"></a>00802 <span class="comment"> */</span>
<a name="l00803"></a>00803 <span class="keywordflow">if</span> (need_flip) {
<a name="l00804"></a>00804 <span class="keywordtype">int</span> i;
<a name="l00805"></a>00805 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"munge_bitmap: Flipping bitmap.\n"</span>);
<a name="l00806"></a>00806 <span class="keywordflow">for</span> (i = 0; i < bmp->h/2; i++) {
<a name="l00807"></a>00807 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *l = bmp->line[i];
<a name="l00808"></a>00808 bmp->line[i] = bmp->line[bmp->h - i - 1];
<a name="l00809"></a>00809 bmp->line[bmp->h - i - 1] = l;
<a name="l00810"></a>00810 }
<a name="l00811"></a>00811 }
<a name="l00812"></a>00812
<a name="l00813"></a>00813 <span class="comment">/* Rescale bitmap */</span>
<a name="l00814"></a>00814 <span class="keywordflow">if</span> (need_rescale) {
<a name="l00815"></a>00815 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"munge_bitmap: Rescaling bitmap.\n"</span>);
<a name="l00816"></a>00816 stretch_blit(bmp, ret, x, y, old_w, old_h, 0, 0, ret->w, ret->h);
<a name="l00817"></a>00817 }
<a name="l00818"></a>00818 <span class="keywordflow">else</span> {
<a name="l00819"></a>00819 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"munge_bitmap: Copying bitmap.\n"</span>);
<a name="l00820"></a>00820 blit(bmp, ret, x, y, 0, 0, w, h);
<a name="l00821"></a>00821 }
<a name="l00822"></a>00822
<a name="l00823"></a>00823 <span class="comment">/* Restore the original bitmap, if needed */</span>
<a name="l00824"></a>00824 <span class="keywordflow">if</span> (need_flip && !temp) {
<a name="l00825"></a>00825 <span class="keywordtype">int</span> i;
<a name="l00826"></a>00826 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"munge_bitmap: Unflipping bitmap.\n"</span>);
<a name="l00827"></a>00827 <span class="keywordflow">for</span> (i = 0; i < bmp->h/2; i++) {
<a name="l00828"></a>00828 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *l = bmp->line[i];
<a name="l00829"></a>00829 bmp->line[i] = bmp->line[bmp->h - i - 1];
<a name="l00830"></a>00830 bmp->line[bmp->h - i - 1] = l;
<a name="l00831"></a>00831 }
<a name="l00832"></a>00832 }
<a name="l00833"></a>00833
<a name="l00834"></a>00834 <span class="comment">/* Insert alpha channel */</span>
<a name="l00835"></a>00835 <span class="keywordflow">if</span> (need_alpha) {
<a name="l00836"></a>00836 <span class="keywordtype">int</span> i, j;
<a name="l00837"></a>00837 <span class="keywordtype">int</span> mask = bitmap_mask_color(ret);
<a name="l00838"></a>00838
<a name="l00839"></a>00839 <span class="comment">/* alpha mask for 5.5.5.1 pixels */</span>
<a name="l00840"></a>00840 <span class="keywordtype">int</span> alpha = (-1) ^ makecol_depth(depth, 255, 255, 255);
<a name="l00841"></a>00841
<a name="l00842"></a>00842 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"munge_bitmap: Inserting alpha channel.\n"</span>);
<a name="l00843"></a>00843
<a name="l00844"></a>00844 <span class="keywordflow">for</span> (j = 0; j < h; j++) {
<a name="l00845"></a>00845 <span class="keywordflow">for</span> (i = 0; i < w; i++) {
<a name="l00846"></a>00846 <span class="keywordtype">int</span> pix;
<a name="l00847"></a>00847
<a name="l00848"></a>00848 <span class="keywordflow">switch</span> (depth) {
<a name="l00849"></a>00849 <span class="keywordflow">case</span> 32:
<a name="l00850"></a>00850 pix = _getpixel32(ret, i, j);
<a name="l00851"></a>00851
<a name="l00852"></a>00852 <span class="keywordflow">if</span> (pix == mask) {
<a name="l00853"></a>00853 pix = 0;
<a name="l00854"></a>00854 }
<a name="l00855"></a>00855 <span class="keywordflow">else</span> <span class="keywordflow">if</span> ((flags & AGL_TEXTURE_HAS_ALPHA) == 0) {
<a name="l00856"></a>00856 <span class="keywordtype">int</span> r, g, b;
<a name="l00857"></a>00857 r = getr32(pix);
<a name="l00858"></a>00858 g = getg32(pix);
<a name="l00859"></a>00859 b = getb32(pix);
<a name="l00860"></a>00860 pix = makeacol32(r, g, b, 255);
<a name="l00861"></a>00861 }
<a name="l00862"></a>00862 _putpixel32(ret, i, j, pix);
<a name="l00863"></a>00863 <span class="keywordflow">break</span>;
<a name="l00864"></a>00864 <span class="keywordflow">case</span> 15:
<a name="l00865"></a>00865 pix = _getpixel16(ret, i, j);
<a name="l00866"></a>00866
<a name="l00867"></a>00867 <span class="keywordflow">if</span> (pix == mask) {
<a name="l00868"></a>00868 pix = 0;
<a name="l00869"></a>00869 }
<a name="l00870"></a>00870 <span class="keywordflow">else</span> {
<a name="l00871"></a>00871 pix |= alpha;
<a name="l00872"></a>00872 }
<a name="l00873"></a>00873
<a name="l00874"></a>00874 _putpixel16(temp, i, j, pix);
<a name="l00875"></a>00875 <span class="keywordflow">break</span>;
<a name="l00876"></a>00876 <span class="keywordflow">default</span>:
<a name="l00877"></a>00877 <span class="comment">/* Shouldn't actually come here */</span>
<a name="l00878"></a>00878 ASSERT(0);
<a name="l00879"></a>00879 }
<a name="l00880"></a>00880 }
<a name="l00881"></a>00881 }
<a name="l00882"></a>00882 }
<a name="l00883"></a>00883
<a name="l00884"></a>00884
<a name="l00885"></a>00885 error:
<a name="l00886"></a>00886 <span class="keywordflow">if</span> (temp) {
<a name="l00887"></a>00887 destroy_bitmap(temp);
<a name="l00888"></a>00888 }
<a name="l00889"></a>00889
<a name="l00890"></a>00890 <span class="keywordflow">return</span> ret;
<a name="l00891"></a>00891 }
<a name="l00892"></a>00892
<a name="l00893"></a>00893
<a name="l00894"></a>00894
<a name="l00895"></a>00895 <span class="comment">/* Perform the actual texture upload. Helper for agl_make_texture_ex().</span>
<a name="l00896"></a>00896 <span class="comment"> */</span>
<a name="l00897"></a><a class="code" href="texture_8c.html#9f80a65f18eb72fcfb893de6b125e57c">00897</a> <span class="keyword">static</span> GLuint <a class="code" href="texture_8c.html#9f80a65f18eb72fcfb893de6b125e57c">do_texture_upload</a>(BITMAP *bmp, GLuint tex, GLint internal_format,
<a name="l00898"></a>00898 GLint format, GLint type, <span class="keywordtype">int</span> flags) {
<a name="l00899"></a>00899
<a name="l00900"></a>00900 <span class="keywordtype">int</span> bytes_per_pixel = BYTES_PER_PIXEL(bitmap_color_depth(bmp));
<a name="l00901"></a>00901 GLint saved_row_length;
<a name="l00902"></a>00902 GLint saved_alignment;
<a name="l00903"></a>00903 GLenum <a class="code" href="scorer_8c.html#8f51691db4d64b4da9a295eca922ffba">target</a> = GL_TEXTURE_2D;
<a name="l00904"></a>00904
<a name="l00905"></a>00905 glBindTexture(target, tex);
<a name="l00906"></a>00906
<a name="l00907"></a>00907
<a name="l00908"></a>00908 <span class="comment">/* Handle proxy texture checks */</span>
<a name="l00909"></a>00909 <span class="keywordflow">if</span> (flags & AGL_TEXTURE_CHECK_VALID_INTERNAL) {
<a name="l00910"></a>00910 <span class="comment">/* <bcoconni> allegro_gl_check_texture is broken with GL drivers based</span>
<a name="l00911"></a>00911 <span class="comment"> * on Mesa. It seems this is a Mesa bug...</span>
<a name="l00912"></a>00912 <span class="comment"> */</span>
<a name="l00913"></a>00913 <span class="keywordflow">if</span> (<a class="code" href="structallegro__gl__info.html">allegro_gl_info</a>.is_mesa_driver) {
<a name="l00914"></a>00914 AGL_LOG(1, <span class="stringliteral">"* Note * check_texture: Mesa driver detected: "</span>
<a name="l00915"></a>00915 <span class="stringliteral">"PROXY_TEXTURE_2D tests are skipped\n"</span>);
<a name="l00916"></a>00916 <span class="keywordflow">return</span> tex;
<a name="l00917"></a>00917 }
<a name="l00918"></a>00918 <span class="keywordflow">else</span> {
<a name="l00919"></a>00919 glTexImage2D(GL_PROXY_TEXTURE_2D, 0, internal_format,
<a name="l00920"></a>00920 bmp->w, bmp->h, 0, format, type, NULL);
<a name="l00921"></a>00921
<a name="l00922"></a>00922 glGetTexLevelParameteriv(GL_PROXY_TEXTURE_2D, 0,
<a name="l00923"></a>00923 GL_TEXTURE_COMPONENTS, &internal_format);
<a name="l00924"></a>00924
<a name="l00925"></a>00925 <span class="keywordflow">return</span> (internal_format ? tex : 0);
<a name="l00926"></a>00926 }
<a name="l00927"></a>00927 }
<a name="l00928"></a>00928
<a name="l00929"></a>00929
<a name="l00930"></a>00930 <span class="comment">/* Set up pixel transfer mode */</span>
<a name="l00931"></a>00931 glGetIntegerv(GL_UNPACK_ROW_LENGTH, &saved_row_length);
<a name="l00932"></a>00932 glGetIntegerv(GL_UNPACK_ALIGNMENT, &saved_alignment);
<a name="l00933"></a>00933 glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
<a name="l00934"></a>00934
<a name="l00935"></a>00935 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"do_texture_upload: Making texture: bpp: %i\n"</span>,
<a name="l00936"></a>00936 bitmap_color_depth(bmp));
<a name="l00937"></a>00937
<a name="l00938"></a>00938 <span class="comment">/* Generate mipmaps, if needed */</span>
<a name="l00939"></a>00939 <span class="keywordflow">if</span> (flags & <a class="code" href="group__texture.html#gbaf179e577a9328a751e92e3603f0746" title="AllegroGL will generate mipmaps for this texture.">AGL_TEXTURE_MIPMAP</a>) {
<a name="l00940"></a>00940
<a name="l00941"></a>00941 <span class="keywordflow">if</span> (<a class="code" href="group__extensions.html#g7492f6f6acc608789210560ee63e5436" title="List of OpenGL extensions supported by AllegroGL.">allegro_gl_extensions_GL</a>.SGIS_generate_mipmap) {
<a name="l00942"></a>00942 <span class="comment">/* Easy way out - let the driver do it ;) </span>
<a name="l00943"></a>00943 <span class="comment"> * We do need to set high-qual mipmap generation though.</span>
<a name="l00944"></a>00944 <span class="comment"> */</span>
<a name="l00945"></a>00945 glHint(GL_GENERATE_MIPMAP_HINT, GL_NICEST);
<a name="l00946"></a>00946 glTexParameteri(target, GL_GENERATE_MIPMAP, GL_TRUE);
<a name="l00947"></a>00947 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"do_texture_upload: Using SGIS_generate_mipmap for "</span>
<a name="l00948"></a>00948 <span class="stringliteral">"mipmap generation.\n"</span>);
<a name="l00949"></a>00949 }
<a name="l00950"></a>00950 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<a class="code" href="structallegro__gl__info.html">allegro_gl_info</a>.is_matrox_g200
<a name="l00951"></a>00951 && (flags & AGL_TEXTURE_MIPMAP) && (bitmap_color_depth(bmp) >= 24
<a name="l00952"></a>00952 || bitmap_color_depth(bmp) == 8)
<a name="l00953"></a>00953 && (bmp->w != bmp->h)) {
<a name="l00954"></a>00954
<a name="l00955"></a>00955 <span class="comment">/* Matrox G200 has issues with our mipmapping code. Use GLU if we</span>
<a name="l00956"></a>00956 <span class="comment"> * can.</span>
<a name="l00957"></a>00957 <span class="comment"> */</span>
<a name="l00958"></a>00958 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"do_texture_upload: Using GLU for mipmaps.\n"</span>);
<a name="l00959"></a>00959 glPixelStorei(GL_UNPACK_ROW_LENGTH, bmp->h > 1
<a name="l00960"></a>00960 ? (bmp->line[1] - bmp->line[0]) / bytes_per_pixel
<a name="l00961"></a>00961 : bmp->w);
<a name="l00962"></a>00962 glPixelStorei(GL_UNPACK_ROW_LENGTH,
<a name="l00963"></a>00963 (bmp->line[1] - bmp->line[0]) / bytes_per_pixel);
<a name="l00964"></a>00964 gluBuild2DMipmaps(GL_TEXTURE_2D, internal_format, bmp->w, bmp->h,
<a name="l00965"></a>00965 format, type, bmp->line[0]);
<a name="l00966"></a>00966 }
<a name="l00967"></a>00967 <span class="keywordflow">else</span> {
<a name="l00968"></a>00968 <span class="keywordtype">int</span> w = bmp->w;
<a name="l00969"></a>00969 <span class="keywordtype">int</span> h = bmp->h;
<a name="l00970"></a>00970 <span class="keywordtype">int</span> depth = bitmap_color_depth(bmp);
<a name="l00971"></a>00971
<a name="l00972"></a>00972 <span class="comment">/* The driver can't generate mipmaps for us. We can't rely on GLU</span>
<a name="l00973"></a>00973 <span class="comment"> * since the Win32 version doesn't support any of the new pixel</span>
<a name="l00974"></a>00974 <span class="comment"> * formats. Instead, we'll use our own downsampler (which only</span>
<a name="l00975"></a>00975 <span class="comment"> * has to work on Allegro BITMAPs)</span>
<a name="l00976"></a>00976 <span class="comment"> */</span>
<a name="l00977"></a>00977 BITMAP *temp = create_bitmap_ex(depth, w / 2, h / 2);
<a name="l00978"></a>00978
<a name="l00979"></a>00979 <span class="comment">/* We need to generate mipmaps up to 1x1 - compute the number</span>
<a name="l00980"></a>00980 <span class="comment"> * of levels we need.</span>
<a name="l00981"></a>00981 <span class="comment"> */</span>
<a name="l00982"></a>00982 <span class="keywordtype">int</span> num_levels = <a class="code" href="texture_8c.html#df4037de25874c6c39f5edf9790feb8b">log2i</a>(MAX(bmp->w, bmp->h));
<a name="l00983"></a>00983
<a name="l00984"></a>00984 <span class="keywordtype">int</span> i, x, y;
<a name="l00985"></a>00985
<a name="l00986"></a>00986 BITMAP *src, *dest;
<a name="l00987"></a>00987
<a name="l00988"></a>00988 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"do_texture_upload: Using Allegro for "</span>
<a name="l00989"></a>00989 <span class="stringliteral">"mipmap generation.\n"</span>);
<a name="l00990"></a>00990
<a name="l00991"></a>00991 <span class="keywordflow">if</span> (!temp) {
<a name="l00992"></a>00992 TRACE(<a class="code" href="aglf_8c.html#8c04b6ea901068c5cc4020e9a18c0cbe">PREFIX_E</a> <span class="stringliteral">"do_texture_upload: Unable to create "</span>
<a name="l00993"></a>00993 <span class="stringliteral">"temporary bitmap sized %ix%ix%i for mipmap generation!"</span>,
<a name="l00994"></a>00994 w / 2, h / 2, depth);
<a name="l00995"></a>00995 tex = 0;
<a name="l00996"></a>00996 <span class="keywordflow">goto</span> end;
<a name="l00997"></a>00997 }
<a name="l00998"></a>00998
<a name="l00999"></a>00999 src = bmp;
<a name="l01000"></a>01000 dest = temp;
<a name="l01001"></a>01001
<a name="l01002"></a>01002 <span class="keywordflow">for</span> (i = 1; i <= num_levels; i++) {
<a name="l01003"></a>01003
<a name="l01004"></a>01004 <span class="keywordflow">for</span> (y = 0; y < h; y += 2) {
<a name="l01005"></a>01005 <span class="keywordflow">for</span> (x = 0; x < w; x += 2) {
<a name="l01006"></a>01006
<a name="l01007"></a>01007 <span class="keywordtype">int</span> r, g, b, a;
<a name="l01008"></a>01008 <span class="keywordtype">int</span> pix[4];
<a name="l01009"></a>01009 <span class="keywordtype">int</span> avg;
<a name="l01010"></a>01010
<a name="l01011"></a>01011 pix[0] = getpixel(src, x, y);
<a name="l01012"></a>01012 pix[1] = getpixel(src, x + 1, y);
<a name="l01013"></a>01013 pix[2] = getpixel(src, x, y + 1);
<a name="l01014"></a>01014 pix[3] = getpixel(src, x + 1, y + 1);
<a name="l01015"></a>01015
<a name="l01016"></a>01016 <span class="keywordflow">if</span> (w == 1) {
<a name="l01017"></a>01017 pix[1] = pix[0];
<a name="l01018"></a>01018 pix[3] = pix[2];
<a name="l01019"></a>01019 }
<a name="l01020"></a>01020 <span class="keywordflow">if</span> (h == 1) {
<a name="l01021"></a>01021 pix[2] = pix[0];
<a name="l01022"></a>01022 pix[3] = pix[1];
<a name="l01023"></a>01023 }
<a name="l01024"></a>01024
<a name="l01025"></a>01025 <span class="keywordflow">if</span> (flags & <a class="code" href="group__texture.html#gd67cfdfd21ef2cae75b03cb871e57f4a" title="Tell AllegroGL that the specified BITMAP is an 8-bpp alpha-only BITMAP.">AGL_TEXTURE_ALPHA_ONLY</a>) {
<a name="l01026"></a>01026 avg = (pix[0] + pix[1] + pix[2] + pix[3] + 2) / 4;
<a name="l01027"></a>01027 }
<a name="l01028"></a>01028 <span class="keywordflow">else</span> {
<a name="l01029"></a>01029 r = (getr_depth(depth, pix[0])
<a name="l01030"></a>01030 + getr_depth(depth, pix[1])
<a name="l01031"></a>01031 + getr_depth(depth, pix[2])
<a name="l01032"></a>01032 + getr_depth(depth, pix[3]) + 2) / 4;
<a name="l01033"></a>01033 g = (getg_depth(depth, pix[0])
<a name="l01034"></a>01034 + getg_depth(depth, pix[1])
<a name="l01035"></a>01035 + getg_depth(depth, pix[2])
<a name="l01036"></a>01036 + getg_depth(depth, pix[3]) + 2) / 4;
<a name="l01037"></a>01037 b = (getb_depth(depth, pix[0])
<a name="l01038"></a>01038 + getb_depth(depth, pix[1])
<a name="l01039"></a>01039 + getb_depth(depth, pix[2])
<a name="l01040"></a>01040 + getb_depth(depth, pix[3]) + 2) / 4;
<a name="l01041"></a>01041 a = (geta_depth(depth, pix[0])
<a name="l01042"></a>01042 + geta_depth(depth, pix[1])
<a name="l01043"></a>01043 + geta_depth(depth, pix[2])
<a name="l01044"></a>01044 + geta_depth(depth, pix[3]) + 2) / 4;
<a name="l01045"></a>01045
<a name="l01046"></a>01046 avg = makeacol_depth(depth, r, g, b, a);
<a name="l01047"></a>01047 }
<a name="l01048"></a>01048
<a name="l01049"></a>01049 putpixel(dest, x / 2, y / 2, avg);
<a name="l01050"></a>01050 }
<a name="l01051"></a>01051 }
<a name="l01052"></a>01052 src = temp;
<a name="l01053"></a>01053
<a name="l01054"></a>01054 <span class="comment">/* Note - we round down; we're still compatible with</span>
<a name="l01055"></a>01055 <span class="comment"> * ARB_texture_non_power_of_two.</span>
<a name="l01056"></a>01056 <span class="comment"> */</span>
<a name="l01057"></a>01057 w = MAX(w / 2, 1);
<a name="l01058"></a>01058 h = MAX(h / 2, 1);
<a name="l01059"></a>01059
<a name="l01060"></a>01060 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"do_texture_upload: Unpack row length: %li.\n"</span>,
<a name="l01061"></a>01061 (temp->h > 1)
<a name="l01062"></a>01062 ? (<span class="keywordtype">long</span> <span class="keywordtype">int</span>)((temp->line[1] - temp->line[0]) / bytes_per_pixel)
<a name="l01063"></a>01063 : temp->w);
<a name="l01064"></a>01064
<a name="l01065"></a>01065 glPixelStorei(GL_UNPACK_ROW_LENGTH, temp->h > 1
<a name="l01066"></a>01066 ? (temp->line[1] - temp->line[0]) / bytes_per_pixel
<a name="l01067"></a>01067 : temp->w);
<a name="l01068"></a>01068
<a name="l01069"></a>01069 glTexImage2D(GL_TEXTURE_2D, i, internal_format,
<a name="l01070"></a>01070 w, h, 0, format, type, temp->line[0]);
<a name="l01071"></a>01071
<a name="l01072"></a>01072 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"do_texture_upload: Mipmap level: %i, "</span>
<a name="l01073"></a>01073 <span class="stringliteral">"size: %i x %i\n"</span>, i, w, h);
<a name="l01074"></a>01074
<a name="l01075"></a>01075 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"do_texture_upload: Uploaded texture: level %i, "</span>
<a name="l01076"></a>01076 <span class="stringliteral">"internalformat: %s, %ix%i, format: 0x%x, type: 0x%x."</span>
<a name="l01077"></a>01077 <span class="stringliteral">"\n"</span>, i, <a class="code" href="texture_8c.html#3492c8521c2bbd3daa2506a232bdce22">__allegro_gl_get_format_description</a>(internal_format),
<a name="l01078"></a>01078 bmp->w, bmp->h, format, type);
<a name="l01079"></a>01079 }
<a name="l01080"></a>01080
<a name="l01081"></a>01081 destroy_bitmap(temp);
<a name="l01082"></a>01082 }
<a name="l01083"></a>01083 }
<a name="l01084"></a>01084
<a name="l01085"></a>01085 glPixelStorei(GL_UNPACK_ROW_LENGTH, (bmp->h > 1)
<a name="l01086"></a>01086 ? (bmp->line[1] - bmp->line[0]) / bytes_per_pixel
<a name="l01087"></a>01087 : bmp->w);
<a name="l01088"></a>01088
<a name="l01089"></a>01089 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"do_texture_upload: Unpack row length: %li.\n"</span>,
<a name="l01090"></a>01090 (bmp->h > 1) ? (<span class="keywordtype">long</span> <span class="keywordtype">int</span>)((bmp->line[1] - bmp->line[0]) / bytes_per_pixel)
<a name="l01091"></a>01091 : bmp->w);
<a name="l01092"></a>01092
<a name="l01093"></a>01093 <span class="comment">/* Upload the base texture */</span>
<a name="l01094"></a>01094 glGetError();
<a name="l01095"></a>01095 glTexImage2D(GL_TEXTURE_2D, 0, internal_format,
<a name="l01096"></a>01096 bmp->w, bmp->h, 0, format, type, bmp->line[0]);
<a name="l01097"></a>01097
<a name="l01098"></a>01098 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"do_texture_upload: Uploaded texture: level 0, "</span>
<a name="l01099"></a>01099 <span class="stringliteral">"internalformat: %s, %ix%i, format: 0x%x, type: 0x%x.\n"</span>,
<a name="l01100"></a>01100 <a class="code" href="texture_8c.html#3492c8521c2bbd3daa2506a232bdce22">__allegro_gl_get_format_description</a>(internal_format),
<a name="l01101"></a>01101 bmp->w, bmp->h, format, type);
<a name="l01102"></a>01102
<a name="l01103"></a>01103 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"do_texture_upload: GL Error code: 0x%x\n"</span>, glGetError());
<a name="l01104"></a>01104
<a name="l01105"></a>01105 <span class="keywordflow">if</span> (!(flags & AGL_TEXTURE_MIPMAP)) {
<a name="l01106"></a>01106 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
<a name="l01107"></a>01107 }
<a name="l01108"></a>01108
<a name="l01109"></a>01109 end:
<a name="l01110"></a>01110 <span class="comment">/* Restore state */</span>
<a name="l01111"></a>01111 glPixelStorei(GL_UNPACK_ROW_LENGTH, saved_row_length);
<a name="l01112"></a>01112 glPixelStorei(GL_UNPACK_ALIGNMENT, saved_alignment);
<a name="l01113"></a>01113
<a name="l01114"></a>01114 <span class="keywordflow">return</span> tex;
<a name="l01115"></a>01115 }
<a name="l01116"></a>01116
<a name="l01117"></a>01117
<a name="l01118"></a>01118
<a name="l01119"></a>01119 <span class="comment">/* GLuint allegro_gl_make_texture_ex(int flag, BITMAP *bmp, GLint internal_format) */</span>
<a name="l01165"></a><a class="code" href="group__texture.html#gf3a48c555068e7051171255c1011150a">01165</a> GLuint <a class="code" href="group__texture.html#gf3a48c555068e7051171255c1011150a" title="Uploads an Allegro BITMAP to the GL driver as a texture.">allegro_gl_make_texture_ex</a>(<span class="keywordtype">int</span> flags, BITMAP *bmp, GLint internal_format)
<a name="l01166"></a>01166 {
<a name="l01167"></a>01167 GLuint tex = 0, ret = 0;
<a name="l01168"></a>01168 BITMAP *temp = NULL;
<a name="l01169"></a>01169 GLint type;
<a name="l01170"></a>01170 GLint format;
<a name="l01171"></a>01171 GLint old_tex;
<a name="l01172"></a>01172
<a name="l01173"></a>01173 <span class="comment">/* Print the parameters */</span>
<a name="l01174"></a>01174 <span class="preprocessor">#ifdef DEBUGMODE</span>
<a name="l01175"></a>01175 <span class="preprocessor"></span> <span class="keywordtype">char</span> buf[1024] = <span class="stringliteral">""</span>;
<a name="l01176"></a>01176 <span class="preprocessor"># define PFLAG(name) if (flags & name) strcat(buf, #name "|");</span>
<a name="l01177"></a>01177 <span class="preprocessor"></span> PFLAG(<a class="code" href="group__texture.html#gbaf179e577a9328a751e92e3603f0746" title="AllegroGL will generate mipmaps for this texture.">AGL_TEXTURE_MIPMAP</a>);
<a name="l01178"></a>01178 PFLAG(<a class="code" href="group__texture.html#g8cc859eadf1610b424cd9188e716f432" title="Tell AllegroGL that the bitmap had an alpha channel, so it should be preserved when...">AGL_TEXTURE_HAS_ALPHA</a>);
<a name="l01179"></a>01179 PFLAG(<a class="code" href="group__texture.html#gdeffe4feb290278035beacedb284a010" title="Flip the texture on the x-axis.">AGL_TEXTURE_FLIP</a>);
<a name="l01180"></a>01180 PFLAG(<a class="code" href="group__texture.html#gba184d573c65f33b35d1d57936607d08" title="Generate an alpha channel for this texture, based on the Allegro mask color.">AGL_TEXTURE_MASKED</a>);
<a name="l01181"></a>01181 PFLAG(<a class="code" href="group__texture.html#ga8b7246edc7ec019ec3b434eb0cacdf2" title="Tell AllegroGL to allow rescaling of the bitmap.">AGL_TEXTURE_RESCALE</a>);
<a name="l01182"></a>01182 PFLAG(<a class="code" href="group__texture.html#gd67cfdfd21ef2cae75b03cb871e57f4a" title="Tell AllegroGL that the specified BITMAP is an 8-bpp alpha-only BITMAP.">AGL_TEXTURE_ALPHA_ONLY</a>);
<a name="l01183"></a>01183 <span class="preprocessor"># undef PFLAG</span>
<a name="l01184"></a>01184 <span class="preprocessor"></span>
<a name="l01185"></a>01185 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"make_texture_ex: flags: %s, bitmap %ix%i, %i bpp.\n"</span>, buf,
<a name="l01186"></a>01186 bmp ? bmp->w : 0, bmp ? bmp->h : 0,
<a name="l01187"></a>01187 bmp ? bitmap_color_depth(bmp) : 0);
<a name="l01188"></a>01188 <span class="keywordflow">if</span> (internal_format == -1) {
<a name="l01189"></a>01189 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"internalformat: AUTO\n"</span>);
<a name="l01190"></a>01190 }
<a name="l01191"></a>01191 <span class="keywordflow">else</span> {
<a name="l01192"></a>01192 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"internalformat: %s\n"</span>,
<a name="l01193"></a>01193 <a class="code" href="texture_8c.html#3492c8521c2bbd3daa2506a232bdce22">__allegro_gl_get_format_description</a>(internal_format));
<a name="l01194"></a>01194 }
<a name="l01195"></a>01195 <span class="preprocessor">#endif </span>
<a name="l01196"></a>01196 <span class="preprocessor"></span>
<a name="l01197"></a>01197 <span class="comment">/* Basic parameter checks */</span>
<a name="l01198"></a>01198 <span class="keywordflow">if</span> (!<a class="code" href="alleggl_8c.html#1cf577416af8a45cce479746114d7acb">__allegro_gl_valid_context</a>)
<a name="l01199"></a>01199 <span class="keywordflow">return</span> 0;
<a name="l01200"></a>01200
<a name="l01201"></a>01201 <span class="keywordflow">if</span> (!bmp) {
<a name="l01202"></a>01202 <span class="keywordflow">return</span> 0;
<a name="l01203"></a>01203 }
<a name="l01204"></a>01204
<a name="l01205"></a>01205 glGetIntegerv(GL_TEXTURE_2D_BINDING, &old_tex);
<a name="l01206"></a>01206
<a name="l01207"></a>01207 <span class="comment">/* Voodoo cards don't seem to support mipmaps for textures over 32x32...</span>
<a name="l01208"></a>01208 <span class="comment"> */</span>
<a name="l01209"></a>01209 <span class="keywordflow">if</span> ((bmp->w > 32 || bmp->h > 32) && (<a class="code" href="structallegro__gl__info.html">allegro_gl_info</a>.is_voodoo)) {
<a name="l01210"></a>01210 <span class="comment">/* Disable mipmapping if the user didn't allow us to rescale */</span>
<a name="l01211"></a>01211 <span class="keywordflow">if</span> (!(flags & <a class="code" href="group__texture.html#ga8b7246edc7ec019ec3b434eb0cacdf2" title="Tell AllegroGL to allow rescaling of the bitmap.">AGL_TEXTURE_RESCALE</a>)) {
<a name="l01212"></a>01212 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"make_texture_ex: Voodoo card detected && texture "</span>
<a name="l01213"></a>01213 <span class="stringliteral">"size > 32 texels && no rescaling. Disabling mipmaps.\n"</span>);
<a name="l01214"></a>01214 flags &= ~<a class="code" href="group__texture.html#gbaf179e577a9328a751e92e3603f0746" title="AllegroGL will generate mipmaps for this texture.">AGL_TEXTURE_MIPMAP</a>;
<a name="l01215"></a>01215 }
<a name="l01216"></a>01216 }
<a name="l01217"></a>01217
<a name="l01218"></a>01218 <span class="comment">/* Check the maximum texture size */</span>
<a name="l01219"></a>01219 <span class="keywordflow">if</span> (bmp->w > <a class="code" href="structallegro__gl__info.html">allegro_gl_info</a>.max_texture_size
<a name="l01220"></a>01220 || bmp->h > <a class="code" href="structallegro__gl__info.html">allegro_gl_info</a>.max_texture_size) {
<a name="l01221"></a>01221 <span class="keywordflow">if</span> ((flags & <a class="code" href="group__texture.html#ga8b7246edc7ec019ec3b434eb0cacdf2" title="Tell AllegroGL to allow rescaling of the bitmap.">AGL_TEXTURE_RESCALE</a>) == 0) {
<a name="l01222"></a>01222 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"make_texture_ex: Max texture size exceeded but no "</span>
<a name="l01223"></a>01223 <span class="stringliteral">"rescaling allowed. Returning 0 (unsupported).\n"</span>);
<a name="l01224"></a>01224 <span class="keywordflow">return</span> 0;
<a name="l01225"></a>01225 }
<a name="l01226"></a>01226 }
<a name="l01227"></a>01227
<a name="l01228"></a>01228 <span class="comment">/* Check power-of-2 */</span>
<a name="l01229"></a>01229 <span class="keywordflow">if</span> (((bmp->w & (bmp->w - 1)) || (bmp->h & (bmp->h - 1)))
<a name="l01230"></a>01230 && !(flags & <a class="code" href="group__texture.html#ga8b7246edc7ec019ec3b434eb0cacdf2" title="Tell AllegroGL to allow rescaling of the bitmap.">AGL_TEXTURE_RESCALE</a>)
<a name="l01231"></a>01231 && !<a class="code" href="group__extensions.html#g7492f6f6acc608789210560ee63e5436" title="List of OpenGL extensions supported by AllegroGL.">allegro_gl_extensions_GL</a>.ARB_texture_non_power_of_two) {
<a name="l01232"></a>01232 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"make_texture_ex: Non-power-of-2 sized bitmap provided, "</span>
<a name="l01233"></a>01233 <span class="stringliteral">"no rescaling allowed, and ARB_texture_non_power_of_two "</span>
<a name="l01234"></a>01234 <span class="stringliteral">"unsupported. Returning 0 (unsupported).\n"</span>);
<a name="l01235"></a>01235 <span class="keywordflow">return</span> 0;
<a name="l01236"></a>01236 }
<a name="l01237"></a>01237
<a name="l01238"></a>01238
<a name="l01239"></a>01239 <span class="comment">/* Get OpenGL format and type for this pixel data */</span>
<a name="l01240"></a>01240 format = <a class="code" href="texture_8c.html#e7375e040634b674f80f4bda0fcf83a4">__allegro_gl_get_bitmap_color_format</a>(bmp, flags);
<a name="l01241"></a>01241 type = <a class="code" href="texture_8c.html#2cef4a2942e811ed2029ac496f298b9b">__allegro_gl_get_bitmap_type</a>(bmp, flags);
<a name="l01242"></a>01242
<a name="l01243"></a>01243 <span class="keywordflow">if</span> (flags & <a class="code" href="group__texture.html#gd67cfdfd21ef2cae75b03cb871e57f4a" title="Tell AllegroGL that the specified BITMAP is an 8-bpp alpha-only BITMAP.">AGL_TEXTURE_ALPHA_ONLY</a>) {
<a name="l01244"></a>01244 type = GL_UNSIGNED_BYTE;
<a name="l01245"></a>01245 <span class="keywordflow">if</span> (internal_format == GL_ALPHA || internal_format == GL_ALPHA4
<a name="l01246"></a>01246 || internal_format == GL_ALPHA8) {
<a name="l01247"></a>01247 format = GL_ALPHA;
<a name="l01248"></a>01248 }
<a name="l01249"></a>01249 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (internal_format == GL_INTENSITY
<a name="l01250"></a>01250 || internal_format == GL_INTENSITY4
<a name="l01251"></a>01251 || internal_format == GL_INTENSITY8) {
<a name="l01252"></a>01252 format = GL_RED;
<a name="l01253"></a>01253 }
<a name="l01254"></a>01254 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (internal_format == GL_LUMINANCE
<a name="l01255"></a>01255 || internal_format == GL_LUMINANCE4
<a name="l01256"></a>01256 || internal_format == GL_LUMINANCE8) {
<a name="l01257"></a>01257 format = GL_LUMINANCE;
<a name="l01258"></a>01258 }
<a name="l01259"></a>01259
<a name="l01260"></a>01260 <span class="comment">/* Alpha bitmaps must be 8-bpp */</span>
<a name="l01261"></a>01261 <span class="keywordflow">if</span> (bitmap_color_depth(bmp) != 8) {
<a name="l01262"></a>01262 <span class="keywordflow">return</span> 0;
<a name="l01263"></a>01263 }
<a name="l01264"></a>01264 }
<a name="l01265"></a>01265
<a name="l01266"></a>01266 <span class="keywordflow">if</span> (flags & <a class="code" href="group__texture.html#gba184d573c65f33b35d1d57936607d08" title="Generate an alpha channel for this texture, based on the Allegro mask color.">AGL_TEXTURE_MASKED</a>) {
<a name="l01267"></a>01267 flags |= AGL_TEXTURE_FORCE_ALPHA_INTERNAL;
<a name="l01268"></a>01268 }
<a name="l01269"></a>01269
<a name="l01270"></a>01270 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"make_texture_ex: Preselected texture format: %s, "</span>
<a name="l01271"></a>01271 <span class="stringliteral">"type: 0x%x\n"</span>, <a class="code" href="texture_8c.html#3492c8521c2bbd3daa2506a232bdce22">__allegro_gl_get_format_description</a>(format), type);
<a name="l01272"></a>01272
<a name="l01273"></a>01273 <span class="comment">/* Munge the bitmap if needed (rescaling, alpha channel, etc) */</span>
<a name="l01274"></a>01274 temp = <a class="code" href="texture_8c.html#1820c681297583935ca97ea9e1d032e6">__allegro_gl_munge_bitmap</a>(flags, bmp, 0, 0, bmp->w, bmp->h,
<a name="l01275"></a>01275 &type, &format);
<a name="l01276"></a>01276 <span class="keywordflow">if</span> (temp) {
<a name="l01277"></a>01277 bmp = temp;
<a name="l01278"></a>01278 }
<a name="l01279"></a>01279
<a name="l01280"></a>01280 <span class="keywordflow">if</span> (internal_format == -1) {
<a name="l01281"></a>01281 internal_format = <a class="code" href="texture_8c.html#3669207f7e280178429393bd61f1172b">__allegro_gl_get_texture_format_ex</a>(bmp, flags);
<a name="l01282"></a>01282 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"make_texture_ex: Picked internalformat: %s\n"</span>,
<a name="l01283"></a>01283 <a class="code" href="texture_8c.html#3492c8521c2bbd3daa2506a232bdce22">__allegro_gl_get_format_description</a>(internal_format));
<a name="l01284"></a>01284 }
<a name="l01285"></a>01285
<a name="l01286"></a>01286 <span class="keywordflow">if</span> (internal_format == -1) {
<a name="l01287"></a>01287 TRACE(<a class="code" href="aglf_8c.html#8c04b6ea901068c5cc4020e9a18c0cbe">PREFIX_E</a> <span class="stringliteral">"make_texture_ex: Invalid internal format!: "</span>
<a name="l01288"></a>01288 <span class="stringliteral">"%s\n"</span>, <a class="code" href="texture_8c.html#3492c8521c2bbd3daa2506a232bdce22">__allegro_gl_get_format_description</a>(internal_format));
<a name="l01289"></a>01289 <span class="keywordflow">goto</span> end;
<a name="l01290"></a>01290 }
<a name="l01291"></a>01291
<a name="l01292"></a>01292 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"make_texture_ex: dest format=%s, source format=%s, "</span>
<a name="l01293"></a>01293 <span class="stringliteral">"type=0x%x\n"</span>, <a class="code" href="texture_8c.html#3492c8521c2bbd3daa2506a232bdce22">__allegro_gl_get_format_description</a>(internal_format),
<a name="l01294"></a>01294 <a class="code" href="texture_8c.html#3492c8521c2bbd3daa2506a232bdce22">__allegro_gl_get_format_description</a>(format), (<span class="keywordtype">int</span>)type);
<a name="l01295"></a>01295
<a name="l01296"></a>01296
<a name="l01297"></a>01297 <span class="comment">/* ATI Radeon 7000 inverts R and B components when generating mipmaps and</span>
<a name="l01298"></a>01298 <span class="comment"> * the internal format is GL_RGB8, but only on mipmaps. Instead, we'll use</span>
<a name="l01299"></a>01299 <span class="comment"> * GL_RGBA8. This works for bitmaps of depth <= 24. For 32-bpp bitmaps,</span>
<a name="l01300"></a>01300 <span class="comment"> * some additional tricks are needed: We must fill in alpha with 255.</span>
<a name="l01301"></a>01301 <span class="comment"> */</span>
<a name="l01302"></a>01302 <span class="keywordflow">if</span> (<a class="code" href="structallegro__gl__info.html">allegro_gl_info</a>.is_ati_radeon_7000 && (flags & <a class="code" href="group__texture.html#gbaf179e577a9328a751e92e3603f0746" title="AllegroGL will generate mipmaps for this texture.">AGL_TEXTURE_MIPMAP</a>)
<a name="l01303"></a>01303 && internal_format == GL_RGB8
<a name="l01304"></a>01304 && <a class="code" href="group__extensions.html#g7492f6f6acc608789210560ee63e5436" title="List of OpenGL extensions supported by AllegroGL.">allegro_gl_extensions_GL</a>.SGIS_generate_mipmap) {
<a name="l01305"></a>01305
<a name="l01306"></a>01306 <span class="keywordtype">int</span> i, j;
<a name="l01307"></a>01307 <span class="keywordtype">int</span> depth = bitmap_color_depth(bmp);
<a name="l01308"></a>01308
<a name="l01309"></a>01309 TRACE(<a class="code" href="alleggl_8c.html#09462782acac95f9a6da67adf659ed6e">PREFIX_I</a> <span class="stringliteral">"make_texture_ex: ATI Radeon 7000 detected, mipmapping "</span>
<a name="l01310"></a>01310 <span class="stringliteral">"used, SGIS_generate_mipmap available and selected "</span>
<a name="l01311"></a>01311 <span class="stringliteral">"internalformat is GL_RGB8 but format is GL_RGBA. Working around "</span>
<a name="l01312"></a>01312 <span class="stringliteral">"ATI driver bug by upgrading bitmap to 32-bpp and using GL_RGBA8 "</span>
<a name="l01313"></a>01313 <span class="stringliteral">"instead.\n"</span>);
<a name="l01314"></a>01314
<a name="l01315"></a>01315 <span class="keywordflow">if</span> (depth == 32) {
<a name="l01316"></a>01316
<a name="l01317"></a>01317 <span class="comment">/* Create temp bitmap if not already there */</span>
<a name="l01318"></a>01318 <span class="keywordflow">if</span> (!temp) {
<a name="l01319"></a>01319 temp = create_bitmap_ex(depth, bmp->w, bmp->h);
<a name="l01320"></a>01320 <span class="keywordflow">if</span> (!temp) {
<a name="l01321"></a>01321 TRACE(<a class="code" href="aglf_8c.html#8c04b6ea901068c5cc4020e9a18c0cbe">PREFIX_E</a> <span class="stringliteral">"make_texture_ex: Unable to allocate "</span>
<a name="l01322"></a>01322 <span class="stringliteral">"memory for temporary bitmap (Radeon 7000 path)!\n"</span>);
<a name="l01323"></a>01323 <span class="keywordflow">goto</span> end;
<a name="l01324"></a>01324 }
<a name="l01325"></a>01325 blit(bmp, temp, 0, 0, 0, 0, bmp->w, bmp->h);
<a name="l01326"></a>01326 bmp = temp;
<a name="l01327"></a>01327 }
<a name="l01328"></a>01328
<a name="l01329"></a>01329 <span class="comment">/* Slow path, until ATI finally gets around to fixing their</span>
<a name="l01330"></a>01330 <span class="comment"> * drivers.</span>
<a name="l01331"></a>01331 <span class="comment"> *</span>
<a name="l01332"></a>01332 <span class="comment"> * Note: If destination internal format was GL_RGBx, then no masking</span>
<a name="l01333"></a>01333 <span class="comment"> * code is needed.</span>
<a name="l01334"></a>01334 <span class="comment"> */</span>
<a name="l01335"></a>01335 <span class="keywordflow">for</span> (j = 0; j < bmp->h; j++) {
<a name="l01336"></a>01336 <span class="keywordflow">for</span> (i = 0; i < bmp->w; i++) {
<a name="l01337"></a>01337 <span class="keywordtype">int</span> pix = _getpixel32(bmp, i, j);
<a name="l01338"></a>01338 _putpixel32(bmp, i, j,
<a name="l01339"></a>01339 makeacol32(getr32(pix), getg32(pix), getb32(pix), 255));
<a name="l01340"></a>01340 }
<a name="l01341"></a>01341 }
<a name="l01342"></a>01342 }
<a name="l01343"></a>01343 internal_format = GL_RGBA8;
<a name="l01344"></a>01344 }
<a name="l01345"></a>01345
<a name="l01346"></a>01346
<a name="l01347"></a>01347 <span class="comment">/* Generate the texture */</span>
<a name="l01348"></a>01348 glGenTextures(1, &tex);
<a name="l01349"></a>01349 <span class="keywordflow">if</span> (!tex) {
<a name="l01350"></a>01350 TRACE(<a class="code" href="aglf_8c.html#8c04b6ea901068c5cc4020e9a18c0cbe">PREFIX_E</a> <span class="stringliteral">"make_texture_ex: Unable to create GL texture!\n"</span>);
<a name="l01351"></a>01351 <span class="keywordflow">goto</span> end;
<a name="l01352"></a>01352 }
<a name="l01353"></a>01353
<a name="l01354"></a>01354 ret = <a class="code" href="texture_8c.html#9f80a65f18eb72fcfb893de6b125e57c">do_texture_upload</a>(bmp, tex, internal_format, format, type, flags);
<a name="l01355"></a>01355
<a name="l01356"></a>01356 end:
<a name="l01357"></a>01357 <span class="keywordflow">if</span> (temp) {
<a name="l01358"></a>01358 destroy_bitmap(temp);
<a name="l01359"></a>01359 }
<a name="l01360"></a>01360
<a name="l01361"></a>01361 <span class="keywordflow">if</span> (!ret && tex) {
<a name="l01362"></a>01362 glDeleteTextures(1, &tex);
<a name="l01363"></a>01363 }
<a name="l01364"></a>01364
<a name="l01365"></a>01365 glBindTexture(GL_TEXTURE_2D, old_tex);
<a name="l01366"></a>01366
<a name="l01367"></a>01367 <span class="keywordflow">return</span> tex;
<a name="l01368"></a>01368 }
<a name="l01369"></a>01369
<a name="l01370"></a>01370
<a name="l01371"></a>01371
<a name="l01372"></a>01372
<a name="l01373"></a>01373
<a name="l01374"></a>01374 <span class="comment">/* GLuint allegro_gl_make_texture(BITMAP *bmp) */</span>
<a name="l01383"></a><a class="code" href="group__texture.html#ge071354f76bc28e1bafbd90bdecbc0c9">01383</a> GLuint <a class="code" href="group__texture.html#ge071354f76bc28e1bafbd90bdecbc0c9" title="Uploads an Allegro BITMAP to the GL driver as a texture.">allegro_gl_make_texture</a>(BITMAP *bmp) {
<a name="l01384"></a>01384
<a name="l01385"></a>01385 <span class="keywordtype">int</span> flags = <a class="code" href="texture_8c.html#7a823b9566f7171bb186ed9e55943fbc">__allegro_gl_convert_flags</a>(0);
<a name="l01386"></a>01386
<a name="l01387"></a>01387 <span class="keywordflow">return</span> <a class="code" href="group__texture.html#gf3a48c555068e7051171255c1011150a" title="Uploads an Allegro BITMAP to the GL driver as a texture.">allegro_gl_make_texture_ex</a>(flags, bmp,
<a name="l01388"></a>01388 <a class="code" href="texture_8c.html#e804102a3d2bd8183b3b73c2b21dec1a">allegro_gl_opengl_internal_texture_format</a>);
<a name="l01389"></a>01389 }
<a name="l01390"></a>01390
<a name="l01391"></a>01391
<a name="l01392"></a>01392
<a name="l01393"></a>01393 <span class="comment">/* GLuint allegro_gl_make_masked_texture(BITMAP *bmp) */</span>
<a name="l01402"></a><a class="code" href="group__texture.html#geb33dfbbc1725f5132c10ac32ef6800d">01402</a> GLuint <a class="code" href="group__texture.html#geb33dfbbc1725f5132c10ac32ef6800d" title="Uploads an Allegro BITMAP to the GL driver as a texture.">allegro_gl_make_masked_texture</a>(BITMAP *bmp) {
<a name="l01403"></a>01403
<a name="l01404"></a>01404 <span class="keywordtype">int</span> flags = <a class="code" href="texture_8c.html#7a823b9566f7171bb186ed9e55943fbc">__allegro_gl_convert_flags</a>(<a class="code" href="group__texture.html#gba184d573c65f33b35d1d57936607d08" title="Generate an alpha channel for this texture, based on the Allegro mask color.">AGL_TEXTURE_MASKED</a>);
<a name="l01405"></a>01405
<a name="l01406"></a>01406 <span class="keywordflow">return</span> <a class="code" href="group__texture.html#gf3a48c555068e7051171255c1011150a" title="Uploads an Allegro BITMAP to the GL driver as a texture.">allegro_gl_make_texture_ex</a>(flags, bmp,
<a name="l01407"></a>01407 <a class="code" href="texture_8c.html#e804102a3d2bd8183b3b73c2b21dec1a">allegro_gl_opengl_internal_texture_format</a>);
<a name="l01408"></a>01408 }
<a name="l01409"></a>01409
<a name="l01410"></a>01410
<a name="l01411"></a>01411
<a name="l01412"></a>01412 <span class="comment">/* GLenum allegro_gl_get_bitmap_type(BITMAP *bmp) */</span>
<a name="l01433"></a><a class="code" href="group__texture.html#g59f7129dd541d2e5a291d36bf90b7289">01433</a> GLenum <a class="code" href="group__texture.html#g59f7129dd541d2e5a291d36bf90b7289" title="AllegroGL will generate mipmaps for this texture.">allegro_gl_get_bitmap_type</a>(BITMAP *bmp) {
<a name="l01434"></a>01434
<a name="l01435"></a>01435 <span class="keywordtype">int</span> flags = <a class="code" href="texture_8c.html#7a823b9566f7171bb186ed9e55943fbc">__allegro_gl_convert_flags</a>(0);
<a name="l01436"></a>01436 <span class="keywordflow">return</span> <a class="code" href="texture_8c.html#2cef4a2942e811ed2029ac496f298b9b">__allegro_gl_get_bitmap_type</a>(bmp, flags);
<a name="l01437"></a>01437 }
<a name="l01438"></a>01438
<a name="l01439"></a>01439
<a name="l01440"></a>01440
<a name="l01441"></a>01441 <span class="comment">/* GLenum allegro_gl_get_bitmap_color_format(BITMAP *bmp) */</span>
<a name="l01456"></a><a class="code" href="group__texture.html#g83b2b13cb35dd4b4e9e874173a246581">01456</a> GLenum <a class="code" href="group__texture.html#g83b2b13cb35dd4b4e9e874173a246581" title="AllegroGL will generate mipmaps for this texture.">allegro_gl_get_bitmap_color_format</a>(BITMAP *bmp) {
<a name="l01457"></a>01457
<a name="l01458"></a>01458 <span class="keywordtype">int</span> flags = <a class="code" href="texture_8c.html#7a823b9566f7171bb186ed9e55943fbc">__allegro_gl_convert_flags</a>(0);
<a name="l01459"></a>01459 <span class="keywordflow">return</span> <a class="code" href="texture_8c.html#e7375e040634b674f80f4bda0fcf83a4">__allegro_gl_get_bitmap_color_format</a>(bmp, flags);
<a name="l01460"></a>01460 }
<a name="l01461"></a>01461
</pre></div><hr size="1"><address style="text-align: right;"><small>Generated on Mon Nov 12 11:05:31 2007 for AllegroGL by
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.2 </small></address>
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