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<div class="title">sdlimage.cpp</div> </div>
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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/***************************************************************************</span>
<a name="l00002"></a>00002 <span class="comment"> * Copyright (C) 2005-2008 by the FIFE team *</span>
<a name="l00003"></a>00003 <span class="comment"> * http://www.fifengine.de *</span>
<a name="l00004"></a>00004 <span class="comment"> * This file is part of FIFE. *</span>
<a name="l00005"></a>00005 <span class="comment"> * *</span>
<a name="l00006"></a>00006 <span class="comment"> * FIFE is free software; you can redistribute it and/or *</span>
<a name="l00007"></a>00007 <span class="comment"> * modify it under the terms of the GNU Lesser General Public *</span>
<a name="l00008"></a>00008 <span class="comment"> * License as published by the Free Software Foundation; either *</span>
<a name="l00009"></a>00009 <span class="comment"> * version 2.1 of the License, or (at your option) any later version. *</span>
<a name="l00010"></a>00010 <span class="comment"> * *</span>
<a name="l00011"></a>00011 <span class="comment"> * This library is distributed in the hope that it will be useful, *</span>
<a name="l00012"></a>00012 <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of *</span>
<a name="l00013"></a>00013 <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *</span>
<a name="l00014"></a>00014 <span class="comment"> * Lesser General Public License for more details. *</span>
<a name="l00015"></a>00015 <span class="comment"> * *</span>
<a name="l00016"></a>00016 <span class="comment"> * You should have received a copy of the GNU Lesser General Public *</span>
<a name="l00017"></a>00017 <span class="comment"> * License along with this library; if not, write to the *</span>
<a name="l00018"></a>00018 <span class="comment"> * Free Software Foundation, Inc., *</span>
<a name="l00019"></a>00019 <span class="comment"> * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *</span>
<a name="l00020"></a>00020 <span class="comment"> ***************************************************************************/</span>
<a name="l00021"></a>00021
<a name="l00022"></a>00022 <span class="comment">// Standard C++ library includes</span>
<a name="l00023"></a>00023 <span class="preprocessor">#include <cassert></span>
<a name="l00024"></a>00024 <span class="preprocessor">#include <iostream></span>
<a name="l00025"></a>00025
<a name="l00026"></a>00026 <span class="comment">// 3rd party library includes</span>
<a name="l00027"></a>00027
<a name="l00028"></a>00028 <span class="comment">// FIFE includes</span>
<a name="l00029"></a>00029 <span class="comment">// These includes are split up in two parts, separated by one empty line</span>
<a name="l00030"></a>00030 <span class="comment">// First block: files included from the FIFE root src directory</span>
<a name="l00031"></a>00031 <span class="comment">// Second block: files included from the same folder</span>
<a name="l00032"></a>00032 <span class="preprocessor">#include "util/log/logger.h"</span>
<a name="l00033"></a>00033 <span class="preprocessor">#include "util/structures/rect.h"</span>
<a name="l00034"></a>00034 <span class="preprocessor">#include "video/renderbackend.h"</span>
<a name="l00035"></a>00035
<a name="l00036"></a>00036 <span class="preprocessor">#include "renderbackendsdl.h"</span>
<a name="l00037"></a>00037 <span class="preprocessor">#include "sdlblendingfunctions.h"</span>
<a name="l00038"></a>00038 <span class="preprocessor">#include "sdlimage.h"</span>
<a name="l00039"></a>00039
<a name="l00040"></a>00040 <span class="keyword">namespace </span>FIFE {
<a name="l00041"></a>00041 <span class="keyword">static</span> Logger _log(LM_VIDEO);
<a name="l00042"></a>00042
<a name="l00043"></a>00043 SDLImage::SDLImage(SDL_Surface* surface):
<a name="l00044"></a>00044 Image(surface) {
<a name="l00045"></a>00045 resetSdlimage();
<a name="l00046"></a>00046 }
<a name="l00047"></a>00047
<a name="l00048"></a>00048 SDLImage::SDLImage(<span class="keyword">const</span> uint8_t* data, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> width, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> height):
<a name="l00049"></a>00049 Image(data, width, height) {
<a name="l00050"></a>00050 resetSdlimage();
<a name="l00051"></a>00051 }
<a name="l00052"></a>00052
<a name="l00053"></a>00053 <span class="keywordtype">void</span> SDLImage::resetSdlimage() {
<a name="l00054"></a>00054 m_last_alpha = 255;
<a name="l00055"></a>00055 m_finalized = <span class="keyword">false</span>;
<a name="l00056"></a>00056 m_isalphaoptimized = <span class="keyword">false</span>;
<a name="l00057"></a>00057 m_colorkey = RenderBackend::instance()->getColorKey();
<a name="l00058"></a>00058 m_scale_x = 1.0;
<a name="l00059"></a>00059 m_scale_y = 1.0;
<a name="l00060"></a>00060 m_zoom_surface = NULL;
<a name="l00061"></a>00061 }
<a name="l00062"></a>00062
<a name="l00063"></a>00063 SDLImage::~SDLImage() {
<a name="l00064"></a>00064 <span class="keywordflow">if</span> (m_zoom_surface) {
<a name="l00065"></a>00065 SDL_FreeSurface(m_zoom_surface);
<a name="l00066"></a>00066 }
<a name="l00067"></a>00067 }
<a name="l00068"></a>00068
<a name="l00069"></a>00069 <span class="keywordtype">void</span> SDL_BlitSurfaceWithAlpha( <span class="keyword">const</span> SDL_Surface* src, <span class="keyword">const</span> SDL_Rect* srcRect,
<a name="l00070"></a>00070 SDL_Surface* dst, SDL_Rect* dstRect, <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> alpha ) {
<a name="l00071"></a>00071 <span class="keywordflow">if</span>( 0 == alpha ) {
<a name="l00072"></a>00072 <span class="keywordflow">return</span>;
<a name="l00073"></a>00073 }
<a name="l00074"></a>00074
<a name="l00075"></a>00075 <span class="keywordtype">int</span> screenX, screenY;
<a name="l00076"></a>00076 <span class="keywordflow">if</span>( dstRect ) {
<a name="l00077"></a>00077 screenX = dstRect->x;
<a name="l00078"></a>00078 screenY = dstRect->y;
<a name="l00079"></a>00079 } <span class="keywordflow">else</span> {
<a name="l00080"></a>00080 screenX = dst->clip_rect.x;
<a name="l00081"></a>00081 screenY = dst->clip_rect.y;
<a name="l00082"></a>00082 }
<a name="l00083"></a>00083
<a name="l00084"></a>00084 <span class="keywordtype">int</span> width, height, tX, tY;
<a name="l00085"></a>00085 <span class="keywordflow">if</span>( srcRect ) {
<a name="l00086"></a>00086 tX = srcRect->x;
<a name="l00087"></a>00087 tY = srcRect->y;
<a name="l00088"></a>00088 width = srcRect->w;
<a name="l00089"></a>00089 height = srcRect->h;
<a name="l00090"></a>00090 } <span class="keywordflow">else</span> {
<a name="l00091"></a>00091 tX = src->clip_rect.x;
<a name="l00092"></a>00092 tY = src->clip_rect.y;
<a name="l00093"></a>00093 width = src->clip_rect.w;
<a name="l00094"></a>00094 height = src->clip_rect.h;
<a name="l00095"></a>00095 }
<a name="l00096"></a>00096
<a name="l00097"></a>00097 <span class="comment">// Clipping.</span>
<a name="l00098"></a>00098 <span class="keywordflow">if</span>( ( screenX >= ( dst->clip_rect.x + dst->clip_rect.w ) ) ||
<a name="l00099"></a>00099 ( screenY >= ( dst->clip_rect.y + dst->clip_rect.h ) ) ||
<a name="l00100"></a>00100 ( ( screenX + width ) <= dst->clip_rect.x ) ||
<a name="l00101"></a>00101 ( ( screenY + height ) <= dst->clip_rect.y ) ) {
<a name="l00102"></a>00102 <span class="keywordflow">return</span>;
<a name="l00103"></a>00103 }
<a name="l00104"></a>00104
<a name="l00105"></a>00105 <span class="keywordflow">if</span>( screenX < dst->clip_rect.x ) {
<a name="l00106"></a>00106 <span class="keywordtype">int</span> dX = dst->clip_rect.x - screenX;
<a name="l00107"></a>00107 screenX += dX;
<a name="l00108"></a>00108 width -= dX;
<a name="l00109"></a>00109 tX += dX;
<a name="l00110"></a>00110 }
<a name="l00111"></a>00111
<a name="l00112"></a>00112 <span class="keywordflow">if</span>( ( screenX + width ) > ( dst->clip_rect.x + dst->clip_rect.w ) ) {
<a name="l00113"></a>00113 <span class="keywordtype">int</span> dX = ( screenX + width ) - ( dst->clip_rect.x + dst->clip_rect.w );
<a name="l00114"></a>00114 width -= dX;
<a name="l00115"></a>00115 }
<a name="l00116"></a>00116
<a name="l00117"></a>00117 <span class="keywordflow">if</span>( screenY < dst->clip_rect.y ) {
<a name="l00118"></a>00118 <span class="keywordtype">int</span> dY = dst->clip_rect.y - screenY;
<a name="l00119"></a>00119 screenY += dY;
<a name="l00120"></a>00120 height -= dY;
<a name="l00121"></a>00121 tY += dY;
<a name="l00122"></a>00122 }
<a name="l00123"></a>00123
<a name="l00124"></a>00124 <span class="keywordflow">if</span>( ( screenY + height ) > ( dst->clip_rect.y + dst->clip_rect.h ) ) {
<a name="l00125"></a>00125 <span class="keywordtype">int</span> dY = ( screenY + height ) - ( dst->clip_rect.y + dst->clip_rect.h );
<a name="l00126"></a>00126 height -= dY;
<a name="l00127"></a>00127 }
<a name="l00128"></a>00128
<a name="l00129"></a>00129 <span class="keywordflow">if</span>( ( 0 >= height ) || ( 0 >= width ) ) {
<a name="l00130"></a>00130 <span class="keywordflow">return</span>;
<a name="l00131"></a>00131 }
<a name="l00132"></a>00132
<a name="l00133"></a>00133 SDL_LockSurface( dst );
<a name="l00134"></a>00134
<a name="l00135"></a>00135 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>* srcData = <span class="keyword">reinterpret_cast<</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>* <span class="keyword">></span> ( src->pixels );
<a name="l00136"></a>00136 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>* dstData = <span class="keyword">reinterpret_cast<</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>* <span class="keyword">></span> ( dst->pixels );
<a name="l00137"></a>00137
<a name="l00138"></a>00138 <span class="comment">// move data pointers to the start of the pixels we're copying</span>
<a name="l00139"></a>00139 srcData += tY * src->pitch + tX * src->format->BytesPerPixel;
<a name="l00140"></a>00140 dstData += screenY * dst->pitch + screenX * dst->format->BytesPerPixel;
<a name="l00141"></a>00141
<a name="l00142"></a>00142 <span class="keywordflow">switch</span>( src->format->BitsPerPixel ) {
<a name="l00143"></a>00143 <span class="keywordflow">case</span> 32: {
<a name="l00144"></a>00144 <span class="keywordflow">switch</span>( dst->format->BitsPerPixel ) {
<a name="l00145"></a>00145 <span class="keywordflow">case</span> 16: {
<a name="l00146"></a>00146 <span class="keywordflow">if</span>( 0xFFFF == ( dst->format->Rmask | dst->format->Gmask | dst->format->Bmask ) ) {
<a name="l00147"></a>00147 <span class="keywordflow">for</span>( <span class="keywordtype">int</span> y = height; y > 0; --y ) {
<a name="l00148"></a>00148 <a class="code" href="namespace_f_i_f_e.html#a2579a9c749d02396470a7119cb8d6b8c">SDL_BlendRow_RGBA8_to_RGB565</a>( srcData, dstData, alpha, width );
<a name="l00149"></a>00149 srcData += src->pitch;
<a name="l00150"></a>00150 dstData += dst->pitch;
<a name="l00151"></a>00151 }
<a name="l00152"></a>00152 }
<a name="l00153"></a>00153 }
<a name="l00154"></a>00154 <span class="keywordflow">break</span>;
<a name="l00155"></a>00155
<a name="l00156"></a>00156 <span class="keywordflow">case</span> 24: {
<a name="l00157"></a>00157 <span class="keywordflow">for</span>( <span class="keywordtype">int</span> y = height; y > 0; --y ) {
<a name="l00158"></a>00158 <a class="code" href="namespace_f_i_f_e.html#a3c507d7326dc83a40e23d19ed77b5bc2">SDL_BlendRow_RGBA8_to_RGB8</a>( srcData, dstData, alpha, width );
<a name="l00159"></a>00159 srcData += src->pitch;
<a name="l00160"></a>00160 dstData += dst->pitch;
<a name="l00161"></a>00161 }
<a name="l00162"></a>00162 }
<a name="l00163"></a>00163 <span class="keywordflow">break</span>;
<a name="l00164"></a>00164
<a name="l00165"></a>00165 <span class="keywordflow">case</span> 32: {
<a name="l00166"></a>00166 <span class="keywordflow">for</span>( <span class="keywordtype">int</span> y = height; y > 0; --y ) {
<a name="l00167"></a>00167 <a class="code" href="namespace_f_i_f_e.html#aa908327fc69912ecd09e830b24e2aadf">SDL_BlendRow_RGBA8_to_RGBA8</a>( srcData, dstData, alpha, width );
<a name="l00168"></a>00168 srcData += src->pitch;
<a name="l00169"></a>00169 dstData += dst->pitch;
<a name="l00170"></a>00170 }
<a name="l00171"></a>00171 }
<a name="l00172"></a>00172 <span class="keywordflow">break</span>;
<a name="l00173"></a>00173
<a name="l00174"></a>00174 <span class="keywordflow">default</span>:
<a name="l00175"></a>00175 <span class="keywordflow">break</span>;
<a name="l00176"></a>00176 }
<a name="l00177"></a>00177 }
<a name="l00178"></a>00178 <span class="keywordflow">break</span>;
<a name="l00179"></a>00179
<a name="l00180"></a>00180 <span class="keywordflow">case</span> 16: {
<a name="l00181"></a>00181 <span class="keywordflow">if</span>( 0x000F == src->format->Amask ) {
<a name="l00182"></a>00182 <span class="keywordflow">if</span>( ( 16 == dst->format->BitsPerPixel ) &&
<a name="l00183"></a>00183 ( 0xFFFF == ( dst->format->Rmask | dst->format->Gmask | dst->format->Bmask ) ) ) {
<a name="l00184"></a>00184 <span class="keywordflow">for</span>( <span class="keywordtype">int</span> y = height; y > 0; --y ) {
<a name="l00185"></a>00185 <a class="code" href="namespace_f_i_f_e.html#aca0c153dd3fac6b19d24e693f7781f53">SDL_BlendRow_RGBA4_to_RGB565</a>( srcData, dstData, alpha, width );
<a name="l00186"></a>00186 srcData += src->pitch;
<a name="l00187"></a>00187 dstData += dst->pitch;
<a name="l00188"></a>00188 }
<a name="l00189"></a>00189 }
<a name="l00190"></a>00190 }
<a name="l00191"></a>00191 }
<a name="l00192"></a>00192 <span class="keywordflow">break</span>;
<a name="l00193"></a>00193
<a name="l00194"></a>00194 <span class="keywordflow">default</span>:
<a name="l00195"></a>00195 <span class="keywordflow">break</span>;
<a name="l00196"></a>00196 }
<a name="l00197"></a>00197
<a name="l00198"></a>00198 SDL_UnlockSurface( dst );
<a name="l00199"></a>00199 }
<a name="l00200"></a>00200
<a name="l00201"></a>00201 <span class="keywordtype">void</span> zoomSurface(SDL_Surface* src, SDL_Surface* dst) {
<a name="l00202"></a>00202 SDL_Color* src_pointer = (SDL_Color*)src->pixels;
<a name="l00203"></a>00203 SDL_Color* src_help_pointer = src_pointer;
<a name="l00204"></a>00204 SDL_Color* dst_pointer = (SDL_Color*)dst->pixels;
<a name="l00205"></a>00205
<a name="l00206"></a>00206 <span class="keywordtype">int</span> x, y, *sx_ca, *sy_ca;
<a name="l00207"></a>00207 <span class="keywordtype">int</span> dst_gap = dst->pitch - dst->w * dst->format->BytesPerPixel;
<a name="l00208"></a>00208 <span class="keywordtype">int</span> sx = <span class="keyword">static_cast<</span><span class="keywordtype">int</span><span class="keyword">></span>(0xffff * src->w / dst->w);
<a name="l00209"></a>00209 <span class="keywordtype">int</span> sy = <span class="keyword">static_cast<</span><span class="keywordtype">int</span><span class="keyword">></span>(0xffff * src->h / dst->h);
<a name="l00210"></a>00210 <span class="keywordtype">int</span> sx_c = 0;
<a name="l00211"></a>00211 <span class="keywordtype">int</span> sy_c = 0;
<a name="l00212"></a>00212
<a name="l00213"></a>00213 <span class="comment">// Allocates memory and calculates row wide&height</span>
<a name="l00214"></a>00214 <span class="keywordtype">int</span>* sx_a = (<span class="keywordtype">int</span>*)malloc((dst->w + 1) * <span class="keyword">sizeof</span>(Uint32));
<a name="l00215"></a>00215 <span class="keywordflow">if</span> (sx_a == NULL) {
<a name="l00216"></a>00216 <span class="keywordflow">return</span>;
<a name="l00217"></a>00217 } <span class="keywordflow">else</span> {
<a name="l00218"></a>00218 sx_ca = sx_a;
<a name="l00219"></a>00219 <span class="keywordflow">for</span> (x = 0; x <= dst->w; x++) {
<a name="l00220"></a>00220 *sx_ca = sx_c;
<a name="l00221"></a>00221 sx_ca++;
<a name="l00222"></a>00222 sx_c &= 0xffff;
<a name="l00223"></a>00223 sx_c += sx;
<a name="l00224"></a>00224 }
<a name="l00225"></a>00225 }
<a name="l00226"></a>00226 <span class="keywordtype">int</span>* sy_a = (<span class="keywordtype">int</span>*)malloc((dst->h + 1) * <span class="keyword">sizeof</span>(Uint32));
<a name="l00227"></a>00227 <span class="keywordflow">if</span> (sy_a == NULL) {
<a name="l00228"></a>00228 free(sx_a);
<a name="l00229"></a>00229 <span class="keywordflow">return</span>;
<a name="l00230"></a>00230 } <span class="keywordflow">else</span> {
<a name="l00231"></a>00231 sy_ca = sy_a;
<a name="l00232"></a>00232 <span class="keywordflow">for</span> (y = 0; y <= dst->h; y++) {
<a name="l00233"></a>00233 *sy_ca = sy_c;
<a name="l00234"></a>00234 sy_ca++;
<a name="l00235"></a>00235 sy_c &= 0xffff;
<a name="l00236"></a>00236 sy_c += sy;
<a name="l00237"></a>00237 }
<a name="l00238"></a>00238 sy_ca = sy_a;
<a name="l00239"></a>00239 }
<a name="l00240"></a>00240
<a name="l00241"></a>00241 <span class="comment">// Transfers the image data</span>
<a name="l00242"></a>00242
<a name="l00243"></a>00243 <span class="keywordflow">if</span>(SDL_MUSTLOCK(src))
<a name="l00244"></a>00244 SDL_LockSurface(src);
<a name="l00245"></a>00245 <span class="keywordflow">if</span>(SDL_MUSTLOCK(dst))
<a name="l00246"></a>00246 SDL_LockSurface(dst);
<a name="l00247"></a>00247
<a name="l00248"></a>00248 <span class="keywordflow">for</span> (y = 0; y < dst->h; y++) {
<a name="l00249"></a>00249 src_pointer = src_help_pointer;
<a name="l00250"></a>00250 sx_ca = sx_a;
<a name="l00251"></a>00251 <span class="keywordflow">for</span> (x = 0; x < dst->w; x++) {
<a name="l00252"></a>00252 *dst_pointer = *src_pointer;
<a name="l00253"></a>00253 sx_ca++;
<a name="l00254"></a>00254 src_pointer += (*sx_ca >> 16);
<a name="l00255"></a>00255 dst_pointer++;
<a name="l00256"></a>00256 }
<a name="l00257"></a>00257 sy_ca++;
<a name="l00258"></a>00258 src_help_pointer = (SDL_Color*)((Uint8*)src_help_pointer + (*sy_ca >> 16) * src->pitch);
<a name="l00259"></a>00259 dst_pointer = (SDL_Color*)((Uint8*)dst_pointer + dst_gap);
<a name="l00260"></a>00260 }
<a name="l00261"></a>00261
<a name="l00262"></a>00262 <span class="keywordflow">if</span>(SDL_MUSTLOCK(dst))
<a name="l00263"></a>00263 SDL_UnlockSurface(dst);
<a name="l00264"></a>00264 <span class="keywordflow">if</span>(SDL_MUSTLOCK(src))
<a name="l00265"></a>00265 SDL_UnlockSurface(src);
<a name="l00266"></a>00266
<a name="l00267"></a>00267 <span class="comment">// Free memory</span>
<a name="l00268"></a>00268 free(sx_a);
<a name="l00269"></a>00269 free(sy_a);
<a name="l00270"></a>00270 }
<a name="l00271"></a>00271
<a name="l00272"></a>00272 SDL_Surface* getZoomedSurface(SDL_Surface * src, <span class="keywordtype">double</span> zoomx, <span class="keywordtype">double</span> zoomy) {
<a name="l00273"></a>00273 <span class="keywordflow">if</span> (src == NULL)
<a name="l00274"></a>00274 <span class="keywordflow">return</span> NULL;
<a name="l00275"></a>00275
<a name="l00276"></a>00276 SDL_Surface *zoom_src;
<a name="l00277"></a>00277 SDL_Surface *zoom_dst;
<a name="l00278"></a>00278 <span class="keywordtype">int</span> dst_w = <span class="keyword">static_cast<</span><span class="keywordtype">int</span><span class="keyword">></span>(round(src->w * zoomx));
<a name="l00279"></a>00279 <span class="keywordtype">int</span> dst_h = <span class="keyword">static_cast<</span><span class="keywordtype">int</span><span class="keyword">></span>(round(src->h * zoomy));
<a name="l00280"></a>00280 <span class="keywordflow">if</span> (dst_w < 1)
<a name="l00281"></a>00281 dst_w = 1;
<a name="l00282"></a>00282 <span class="keywordflow">if</span> (dst_h < 1)
<a name="l00283"></a>00283 dst_h = 1;
<a name="l00284"></a>00284
<a name="l00285"></a>00285 <span class="comment">// If source surface has no alpha channel then convert it</span>
<a name="l00286"></a>00286 <span class="keywordflow">if</span> (src->format->Amask == 0) {
<a name="l00287"></a>00287 zoom_src = SDL_CreateRGBSurface(SDL_SWSURFACE, src->w, src->h, 32,
<a name="l00288"></a>00288 RMASK, GMASK,
<a name="l00289"></a>00289 BMASK, AMASK);
<a name="l00290"></a>00290 SDL_BlitSurface(src, NULL, zoom_src, NULL);
<a name="l00291"></a>00291 } <span class="keywordflow">else</span> {
<a name="l00292"></a>00292 zoom_src = src;
<a name="l00293"></a>00293 }
<a name="l00294"></a>00294 <span class="comment">// Create destination surface</span>
<a name="l00295"></a>00295 zoom_dst = SDL_CreateRGBSurface(SDL_SWSURFACE, dst_w, dst_h, 32,
<a name="l00296"></a>00296 zoom_src->format->Rmask, zoom_src->format->Gmask,
<a name="l00297"></a>00297 zoom_src->format->Bmask, zoom_src->format->Amask);
<a name="l00298"></a>00298
<a name="l00299"></a>00299 <span class="comment">// Zoom surface</span>
<a name="l00300"></a>00300 zoomSurface(zoom_src, zoom_dst);
<a name="l00301"></a>00301
<a name="l00302"></a>00302 <span class="keywordflow">return</span> zoom_dst;
<a name="l00303"></a>00303 }
<a name="l00304"></a>00304
<a name="l00305"></a>00305 <span class="keywordtype">bool</span> nearlyEqual(<span class="keywordtype">float</span> a, <span class="keywordtype">float</span> b) {
<a name="l00306"></a>00306 <span class="keywordflow">return</span> ABS(a - b) <= 0.00001;
<a name="l00307"></a>00307 }
<a name="l00308"></a>00308
<a name="l00309"></a><a class="code" href="class_f_i_f_e_1_1_s_d_l_image.html#aa3b1386205ff83c70a3f25c5ec2ade4f">00309</a> <span class="keywordtype">void</span> SDLImage::render(<span class="keyword">const</span> <a class="code" href="class_f_i_f_e_1_1_rect_type.html">Rect</a>& rect, SDL_Surface* screen, <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> alpha) {
<a name="l00310"></a>00310 <span class="keywordflow">if</span> (alpha == 0) {
<a name="l00311"></a>00311 <span class="keywordflow">return</span>;
<a name="l00312"></a>00312 }
<a name="l00313"></a>00313
<a name="l00314"></a>00314 <span class="keywordflow">if</span> (rect.<a class="code" href="class_f_i_f_e_1_1_rect_type.html#a00bc81e72fe8b80839b70c7e0c6b6e0d">right</a>() < 0 || rect.<a class="code" href="class_f_i_f_e_1_1_rect_type.html#a1462240577c7175bef3c488844530556">x</a> > <span class="keyword">static_cast<</span><span class="keywordtype">int</span><span class="keyword">></span>(screen->w) || rect.<a class="code" href="class_f_i_f_e_1_1_rect_type.html#a1b243eaaa7423949ad5fcf1721d5bd52">bottom</a>() < 0 || rect.<a class="code" href="class_f_i_f_e_1_1_rect_type.html#a135a0cfb36dec8f6866a21d64834aae9">y</a> > <span class="keyword">static_cast<</span><span class="keywordtype">int</span><span class="keyword">></span>(screen->h)) {
<a name="l00315"></a>00315 <span class="keywordflow">return</span>;
<a name="l00316"></a>00316 }
<a name="l00317"></a>00317 finalize();
<a name="l00318"></a>00318
<a name="l00319"></a>00319 SDL_Surface* surface = screen;
<a name="l00320"></a>00320 SDL_Rect r;
<a name="l00321"></a>00321 r.x = rect.<a class="code" href="class_f_i_f_e_1_1_rect_type.html#a1462240577c7175bef3c488844530556">x</a>;
<a name="l00322"></a>00322 r.y = rect.<a class="code" href="class_f_i_f_e_1_1_rect_type.html#a135a0cfb36dec8f6866a21d64834aae9">y</a>;
<a name="l00323"></a>00323 r.w = rect.<a class="code" href="class_f_i_f_e_1_1_rect_type.html#a223da08d1aea81bcaddfe5d21ddbed78">w</a>;
<a name="l00324"></a>00324 r.h = rect.<a class="code" href="class_f_i_f_e_1_1_rect_type.html#ab730362297bd05feec94a6fdfdaa2aab">h</a>;
<a name="l00325"></a>00325
<a name="l00326"></a>00326 <span class="keywordtype">float</span> scale_x = <span class="keyword">static_cast<</span><span class="keywordtype">float</span><span class="keyword">></span>(rect.<a class="code" href="class_f_i_f_e_1_1_rect_type.html#a223da08d1aea81bcaddfe5d21ddbed78">w</a>) / static_cast<float>(m_surface->w);
<a name="l00327"></a>00327 <span class="keywordtype">float</span> scale_y = <span class="keyword">static_cast<</span><span class="keywordtype">float</span><span class="keyword">></span>(rect.<a class="code" href="class_f_i_f_e_1_1_rect_type.html#ab730362297bd05feec94a6fdfdaa2aab">h</a>) / static_cast<float>(m_surface->h);
<a name="l00328"></a>00328 <span class="keywordtype">bool</span> zoomed = <span class="keyword">false</span>;
<a name="l00329"></a>00329 <span class="keywordtype">bool</span> equal = <span class="keyword">false</span>;
<a name="l00330"></a>00330
<a name="l00331"></a>00331 <span class="keywordflow">if</span> (!nearlyEqual(scale_x, 1.0) && !nearlyEqual(scale_y, 1.0)) {
<a name="l00332"></a>00332 zoomed = <span class="keyword">true</span>;
<a name="l00333"></a>00333 <span class="keywordflow">if</span>(nearlyEqual(m_scale_x, scale_x) && nearlyEqual(m_scale_y, scale_y)) {
<a name="l00334"></a>00334 equal = <span class="keyword">true</span>;
<a name="l00335"></a>00335 } <span class="keywordflow">else</span> {
<a name="l00336"></a>00336 m_scale_x = scale_x;
<a name="l00337"></a>00337 m_scale_y = scale_y;
<a name="l00338"></a>00338 }
<a name="l00339"></a>00339 }
<a name="l00340"></a>00340
<a name="l00341"></a>00341 <span class="keywordflow">if</span> (m_surface->format->Amask == 0) {
<a name="l00342"></a>00342 <span class="comment">// Image has no alpha channel. This allows us to use the per-surface alpha.</span>
<a name="l00343"></a>00343 <span class="keywordflow">if</span> (m_last_alpha != alpha) {
<a name="l00344"></a>00344 m_last_alpha = alpha;
<a name="l00345"></a>00345 SDL_SetAlpha(m_surface, SDL_SRCALPHA | SDL_RLEACCEL, alpha);
<a name="l00346"></a>00346 }
<a name="l00347"></a>00347 <span class="keywordflow">if</span> (!zoomed) {
<a name="l00348"></a>00348 SDL_BlitSurface(m_surface, 0, surface, &r);
<a name="l00349"></a>00349 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (equal && m_zoom_surface) {
<a name="l00350"></a>00350 SDL_BlitSurface(m_zoom_surface, 0, surface, &r);
<a name="l00351"></a>00351 } <span class="keywordflow">else</span> {
<a name="l00352"></a>00352 SDL_FreeSurface(m_zoom_surface);
<a name="l00353"></a>00353 m_zoom_surface = getZoomedSurface(m_surface, m_scale_x, m_scale_y);
<a name="l00354"></a>00354 SDL_BlitSurface(m_zoom_surface, 0, surface, &r);
<a name="l00355"></a>00355 }
<a name="l00356"></a>00356 } <span class="keywordflow">else</span> {
<a name="l00357"></a>00357 <span class="keywordflow">if</span>( 255 != alpha ) {
<a name="l00358"></a>00358 <span class="comment">// Special blitting routine with alpha blending:</span>
<a name="l00359"></a>00359 <span class="comment">// dst.rgb = ( src.rgb * src.a * alpha ) + ( dst.rgb * (255 - ( src.a * alpha ) ) );</span>
<a name="l00360"></a>00360 <span class="keywordflow">if</span> (!zoomed) {
<a name="l00361"></a>00361 SDL_BlitSurfaceWithAlpha( m_surface, 0, surface, &r, alpha );
<a name="l00362"></a>00362 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (equal && m_zoom_surface) {
<a name="l00363"></a>00363 SDL_BlitSurfaceWithAlpha(m_zoom_surface, 0, surface, &r, alpha );
<a name="l00364"></a>00364 } <span class="keywordflow">else</span> {
<a name="l00365"></a>00365 SDL_FreeSurface(m_zoom_surface);
<a name="l00366"></a>00366 m_zoom_surface = getZoomedSurface(m_surface, m_scale_x, m_scale_y);
<a name="l00367"></a>00367 SDL_BlitSurfaceWithAlpha(m_zoom_surface, 0, surface, &r, alpha );
<a name="l00368"></a>00368 }
<a name="l00369"></a>00369 } <span class="keywordflow">else</span> {
<a name="l00370"></a>00370 <span class="keywordflow">if</span> (!zoomed) {
<a name="l00371"></a>00371 SDL_BlitSurface(m_surface, 0, surface, &r);
<a name="l00372"></a>00372 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (equal && m_zoom_surface) {
<a name="l00373"></a>00373 SDL_BlitSurface(m_zoom_surface, 0, surface, &r);
<a name="l00374"></a>00374 } <span class="keywordflow">else</span> {
<a name="l00375"></a>00375 SDL_FreeSurface(m_zoom_surface);
<a name="l00376"></a>00376 m_zoom_surface = getZoomedSurface(m_surface, m_scale_x, m_scale_y);
<a name="l00377"></a>00377 SDL_BlitSurface(m_zoom_surface, 0, surface, &r);
<a name="l00378"></a>00378 }
<a name="l00379"></a>00379 }
<a name="l00380"></a>00380 }
<a name="l00381"></a>00381 }
<a name="l00382"></a>00382
<a name="l00383"></a>00383 <span class="keywordtype">void</span> SDLImage::finalize() {
<a name="l00384"></a>00384 <span class="keywordflow">if</span>( m_finalized ) {
<a name="l00385"></a>00385 <span class="keywordflow">return</span>;
<a name="l00386"></a>00386 }
<a name="l00387"></a>00387 m_finalized = <span class="keyword">true</span>;
<a name="l00388"></a>00388 SDL_Surface *old_surface = m_surface;
<a name="l00389"></a>00389 Uint32 key = SDL_MapRGB(m_surface->format, m_colorkey.r, m_colorkey.g, m_colorkey.b);
<a name="l00390"></a>00390
<a name="l00391"></a>00391 <span class="keywordflow">if</span> (m_surface->format->Amask == 0) {
<a name="l00392"></a>00392 <span class="comment">// only use color key if feature is enabled</span>
<a name="l00393"></a>00393 <span class="keywordflow">if</span> (RenderBackend::instance()->isColorKeyEnabled()) {
<a name="l00394"></a>00394 SDL_SetColorKey(m_surface, SDL_SRCCOLORKEY, key);
<a name="l00395"></a>00395 }
<a name="l00396"></a>00396
<a name="l00397"></a>00397 m_surface = SDL_DisplayFormat(m_surface);
<a name="l00398"></a>00398 } <span class="keywordflow">else</span> {
<a name="l00399"></a>00399 RenderBackendSDL* be = <span class="keyword">static_cast<</span>RenderBackendSDL*<span class="keyword">></span>(RenderBackend::instance());
<a name="l00400"></a>00400 m_isalphaoptimized = be->isAlphaOptimizerEnabled();
<a name="l00401"></a>00401 <span class="keywordflow">if</span>( m_isalphaoptimized ) {
<a name="l00402"></a>00402 m_surface = optimize(m_surface);
<a name="l00403"></a>00403 } <span class="keywordflow">else</span> {
<a name="l00404"></a>00404 SDL_SetAlpha(m_surface, SDL_SRCALPHA, 255);
<a name="l00405"></a>00405
<a name="l00406"></a>00406 <span class="comment">// only use color key if feature is enabled</span>
<a name="l00407"></a>00407 <span class="keywordflow">if</span> (RenderBackend::instance()->isColorKeyEnabled()) {
<a name="l00408"></a>00408 SDL_SetColorKey(m_surface, SDL_SRCCOLORKEY, key);
<a name="l00409"></a>00409 }
<a name="l00410"></a>00410
<a name="l00411"></a>00411 m_surface = SDL_DisplayFormatAlpha(m_surface);
<a name="l00412"></a>00412 }
<a name="l00413"></a>00413 }
<a name="l00414"></a>00414 SDL_FreeSurface(old_surface);
<a name="l00415"></a>00415 }
<a name="l00416"></a>00416
<a name="l00417"></a>00417 SDL_Surface* SDLImage::optimize(SDL_Surface* src) {
<a name="l00418"></a>00418 <span class="comment">// The algorithm is originally by "Tim Goya" <tuxdev103@gmail.com></span>
<a name="l00419"></a>00419 <span class="comment">// Few modifications and adaptions by the FIFE team.</span>
<a name="l00420"></a>00420 <span class="comment">//</span>
<a name="l00421"></a>00421 <span class="comment">// It tries to determine whether an image with a alpha channel</span>
<a name="l00422"></a>00422 <span class="comment">// actually uses that. Often PNGs contains an alpha channels</span>
<a name="l00423"></a>00423 <span class="comment">// as they don't provide a colorkey feature(?) - so to speed</span>
<a name="l00424"></a>00424 <span class="comment">// up SDL rendering we try to remove the alpha channel.</span>
<a name="l00425"></a>00425
<a name="l00426"></a>00426 <span class="comment">// As a reminder: src->format->Amask != 0 here</span>
<a name="l00427"></a>00427
<a name="l00428"></a>00428 <span class="keywordtype">int</span> transparent = 0;
<a name="l00429"></a>00429 <span class="keywordtype">int</span> opaque = 0;
<a name="l00430"></a>00430 <span class="keywordtype">int</span> semitransparent = 0;
<a name="l00431"></a>00431 <span class="keywordtype">int</span> alphasum = 0;
<a name="l00432"></a>00432 <span class="keywordtype">int</span> alphasquaresum = 0;
<a name="l00433"></a>00433 <span class="keywordtype">bool</span> colors[(1 << 12)];
<a name="l00434"></a>00434 memset(colors, 0, (1 << 12) * <span class="keyword">sizeof</span>(<span class="keywordtype">bool</span>));
<a name="l00435"></a>00435
<a name="l00436"></a>00436 <span class="keywordtype">int</span> bpp = src->format->BytesPerPixel;
<a name="l00437"></a>00437 <span class="keywordflow">if</span>(SDL_MUSTLOCK(src)) {
<a name="l00438"></a>00438 SDL_LockSurface(src);
<a name="l00439"></a>00439 }
<a name="l00440"></a>00440 <span class="comment">/* In the first pass through we calculate avg(alpha), avg(alpha^2)</span>
<a name="l00441"></a>00441 <span class="comment"> and the number of semitransparent pixels.</span>
<a name="l00442"></a>00442 <span class="comment"> We also try to find a useable color.</span>
<a name="l00443"></a>00443 <span class="comment"> */</span>
<a name="l00444"></a>00444 <span class="keywordflow">for</span>(<span class="keywordtype">int</span> y = 0;y < src->h;y++) {
<a name="l00445"></a>00445 <span class="keywordflow">for</span>(<span class="keywordtype">int</span> x = 0;x < src->w;x++) {
<a name="l00446"></a>00446 Uint8 *pixel = (Uint8 *) src->pixels + y * src->pitch + x * bpp;
<a name="l00447"></a>00447 Uint32 mapped = 0;
<a name="l00448"></a>00448 <span class="keywordflow">switch</span>(bpp) {
<a name="l00449"></a>00449 <span class="keywordflow">case</span> 1:
<a name="l00450"></a>00450 mapped = *pixel;
<a name="l00451"></a>00451 <span class="keywordflow">break</span>;
<a name="l00452"></a>00452 <span class="keywordflow">case</span> 2:
<a name="l00453"></a>00453 mapped = *(Uint16 *)pixel;
<a name="l00454"></a>00454 <span class="keywordflow">break</span>;
<a name="l00455"></a>00455 <span class="keywordflow">case</span> 3:
<a name="l00456"></a>00456 <span class="preprocessor">#if SDL_BYTEORDER == SDL_BIG_ENDIAN</span>
<a name="l00457"></a>00457 <span class="preprocessor"></span> mapped |= pixel[0] << 16;
<a name="l00458"></a>00458 mapped |= pixel[1] << 8;
<a name="l00459"></a>00459 mapped |= pixel[2] << 0;
<a name="l00460"></a>00460 <span class="preprocessor">#else</span>
<a name="l00461"></a>00461 <span class="preprocessor"></span> mapped |= pixel[0] << 0;
<a name="l00462"></a>00462 mapped |= pixel[1] << 8;
<a name="l00463"></a>00463 mapped |= pixel[2] << 16;
<a name="l00464"></a>00464 <span class="preprocessor">#endif</span>
<a name="l00465"></a>00465 <span class="preprocessor"></span> <span class="keywordflow">break</span>;
<a name="l00466"></a>00466 <span class="keywordflow">case</span> 4:
<a name="l00467"></a>00467 mapped = *(Uint32 *)pixel;
<a name="l00468"></a>00468 <span class="keywordflow">break</span>;
<a name="l00469"></a>00469 }
<a name="l00470"></a>00470 Uint8 red, green, blue, alpha;
<a name="l00471"></a>00471 SDL_GetRGBA(mapped, src->format, &red, &green, &blue, &alpha);
<a name="l00472"></a>00472 <span class="keywordflow">if</span>(alpha < 16) {
<a name="l00473"></a>00473 transparent++;
<a name="l00474"></a>00474 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (alpha > 240) {
<a name="l00475"></a>00475 opaque++;
<a name="l00476"></a>00476 alphasum += alpha;
<a name="l00477"></a>00477 alphasquaresum += alpha*alpha;
<a name="l00478"></a>00478 } <span class="keywordflow">else</span> {
<a name="l00479"></a>00479 semitransparent++;
<a name="l00480"></a>00480 alphasum += alpha;
<a name="l00481"></a>00481 alphasquaresum += alpha*alpha;
<a name="l00482"></a>00482 }
<a name="l00483"></a>00483 <span class="comment">// mark the color as used.</span>
<a name="l00484"></a>00484 <span class="keywordflow">if</span>( alpha != 0 ) {
<a name="l00485"></a>00485 colors[((red & 0xf0) << 4) | (green & 0xf0) | ((blue & 0xf0) >> 4)] = <span class="keyword">true</span>;
<a name="l00486"></a>00486 }
<a name="l00487"></a>00487 }
<a name="l00488"></a>00488 }
<a name="l00489"></a>00489 <span class="keywordtype">int</span> avgalpha = (opaque + semitransparent) ? alphasum / (opaque + semitransparent) : 0;
<a name="l00490"></a>00490 <span class="keywordtype">int</span> alphavariance = 0;
<a name="l00491"></a>00491
<a name="l00492"></a>00492 <span class="keywordflow">if</span>(SDL_MUSTLOCK(src)) {
<a name="l00493"></a>00493 SDL_UnlockSurface(src);
<a name="l00494"></a>00494 }
<a name="l00495"></a>00495 alphasquaresum /= (opaque + semitransparent) ? (opaque + semitransparent) : 1;
<a name="l00496"></a>00496 alphavariance = alphasquaresum - avgalpha*avgalpha;
<a name="l00497"></a>00497 <span class="keywordflow">if</span>(semitransparent > ((transparent + opaque + semitransparent) / 8)
<a name="l00498"></a>00498 && alphavariance > 16) {
<a name="l00499"></a>00499 FL_DBG(_log, LMsg(<span class="stringliteral">"sdlimage"</span>)
<a name="l00500"></a>00500 << <span class="stringliteral">"Trying to alpha-optimize image. FAILED: real alpha usage. "</span>
<a name="l00501"></a>00501 << <span class="stringliteral">" alphavariance="</span> << alphavariance
<a name="l00502"></a>00502 << <span class="stringliteral">" total="</span> << (transparent + opaque + semitransparent)
<a name="l00503"></a>00503 << <span class="stringliteral">" semitransparent="</span> << semitransparent
<a name="l00504"></a>00504 << <span class="stringliteral">"("</span> << (<span class="keywordtype">float</span>(semitransparent)/(transparent + opaque + semitransparent))
<a name="l00505"></a>00505 << <span class="stringliteral">")"</span>);
<a name="l00506"></a>00506 <span class="keywordflow">return</span> SDL_DisplayFormatAlpha(src);
<a name="l00507"></a>00507 }
<a name="l00508"></a>00508
<a name="l00509"></a>00509 <span class="comment">// check availability of a suitable color as colorkey</span>
<a name="l00510"></a>00510 <span class="keywordtype">int</span> keycolor = -1;
<a name="l00511"></a>00511 <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i = 0;i < (1 << 12);i++) {
<a name="l00512"></a>00512 <span class="keywordflow">if</span>(!colors[i]) {
<a name="l00513"></a>00513 keycolor = i;
<a name="l00514"></a>00514 <span class="keywordflow">break</span>;
<a name="l00515"></a>00515 }
<a name="l00516"></a>00516 }
<a name="l00517"></a>00517 <span class="keywordflow">if</span>(keycolor == -1) {
<a name="l00518"></a>00518 FL_DBG(_log, LMsg(<span class="stringliteral">"sdlimage"</span>) << <span class="stringliteral">"Trying to alpha-optimize image. FAILED: no free color"</span>);
<a name="l00519"></a>00519 <span class="keywordflow">return</span> SDL_DisplayFormatAlpha(src);
<a name="l00520"></a>00520 }
<a name="l00521"></a>00521
<a name="l00522"></a>00522 SDL_Surface *dst = SDL_CreateRGBSurface(src->flags & ~(SDL_SRCALPHA) | SDL_SWSURFACE,
<a name="l00523"></a>00523 src->w, src->h,
<a name="l00524"></a>00524 src->format->BitsPerPixel,
<a name="l00525"></a>00525 src->format->Rmask, src->format->Gmask,
<a name="l00526"></a>00526 src->format->Bmask, 0);
<a name="l00527"></a>00527 bpp = dst->format->BytesPerPixel;
<a name="l00528"></a>00528
<a name="l00529"></a>00529 Uint32 key = SDL_MapRGB(dst->format, m_colorkey.r, m_colorkey.g, m_colorkey.b);
<a name="l00530"></a>00530
<a name="l00531"></a>00531 <span class="comment">// if the global color key feature is disabled, then use the manually found color key</span>
<a name="l00532"></a>00532 <span class="keywordflow">if</span> (!RenderBackend::instance()->isColorKeyEnabled()) {
<a name="l00533"></a>00533 key = SDL_MapRGB(dst->format,
<a name="l00534"></a>00534 (((keycolor & 0xf00) >> 4) | 0xf),
<a name="l00535"></a>00535 ((keycolor & 0xf0) | 0xf),
<a name="l00536"></a>00536 (((keycolor & 0xf) << 4) | 0xf));
<a name="l00537"></a>00537 }
<a name="l00538"></a>00538
<a name="l00539"></a>00539 <span class="keywordflow">if</span>(SDL_MUSTLOCK(src)) {
<a name="l00540"></a>00540 SDL_LockSurface(src);
<a name="l00541"></a>00541 }
<a name="l00542"></a>00542 <span class="keywordflow">if</span>(SDL_MUSTLOCK(dst)) {
<a name="l00543"></a>00543 SDL_LockSurface(dst);
<a name="l00544"></a>00544 }
<a name="l00545"></a>00545 <span class="keywordflow">for</span>(<span class="keywordtype">int</span> y = 0;y < dst->h;y++) {
<a name="l00546"></a>00546 <span class="keywordflow">for</span>(<span class="keywordtype">int</span> x = 0;x < dst->w;x++) {
<a name="l00547"></a>00547 Uint8 *srcpixel = (Uint8 *) src->pixels + y * src->pitch + x * bpp;
<a name="l00548"></a>00548 Uint8 *dstpixel = (Uint8 *) dst->pixels + y * dst->pitch + x * bpp;
<a name="l00549"></a>00549 Uint32 mapped = 0;
<a name="l00550"></a>00550 <span class="keywordflow">switch</span>(bpp) {
<a name="l00551"></a>00551 <span class="keywordflow">case</span> 1:
<a name="l00552"></a>00552 mapped = *srcpixel;
<a name="l00553"></a>00553 <span class="keywordflow">break</span>;
<a name="l00554"></a>00554 <span class="keywordflow">case</span> 2:
<a name="l00555"></a>00555 mapped = *(Uint16 *)srcpixel;
<a name="l00556"></a>00556 <span class="keywordflow">break</span>;
<a name="l00557"></a>00557 <span class="keywordflow">case</span> 3:
<a name="l00558"></a>00558 <span class="preprocessor">#if SDL_BYTEORDER == SDL_BIG_ENDIAN</span>
<a name="l00559"></a>00559 <span class="preprocessor"></span> mapped |= srcpixel[0] << 16;
<a name="l00560"></a>00560 mapped |= srcpixel[1] << 8;
<a name="l00561"></a>00561 mapped |= srcpixel[2] << 0;
<a name="l00562"></a>00562 <span class="preprocessor">#else</span>
<a name="l00563"></a>00563 <span class="preprocessor"></span> mapped |= srcpixel[0] << 0;
<a name="l00564"></a>00564 mapped |= srcpixel[1] << 8;
<a name="l00565"></a>00565 mapped |= srcpixel[2] << 16;
<a name="l00566"></a>00566 <span class="preprocessor">#endif</span>
<a name="l00567"></a>00567 <span class="preprocessor"></span> <span class="keywordflow">break</span>;
<a name="l00568"></a>00568 <span class="keywordflow">case</span> 4:
<a name="l00569"></a>00569 mapped = *(Uint32 *)srcpixel;
<a name="l00570"></a>00570 <span class="keywordflow">break</span>;
<a name="l00571"></a>00571 }
<a name="l00572"></a>00572 Uint8 red, green, blue, alpha;
<a name="l00573"></a>00573 SDL_GetRGBA(mapped, src->format, &red, &green, &blue, &alpha);
<a name="l00574"></a>00574 <span class="keywordflow">if</span>(alpha < (avgalpha / 4)) {
<a name="l00575"></a>00575 mapped = key;
<a name="l00576"></a>00576 } <span class="keywordflow">else</span> {
<a name="l00577"></a>00577 mapped = SDL_MapRGB(dst->format, red, green, blue);
<a name="l00578"></a>00578 }
<a name="l00579"></a>00579 <span class="keywordflow">switch</span>(bpp) {
<a name="l00580"></a>00580 <span class="keywordflow">case</span> 1:
<a name="l00581"></a>00581 *dstpixel = mapped;
<a name="l00582"></a>00582 <span class="keywordflow">break</span>;
<a name="l00583"></a>00583 <span class="keywordflow">case</span> 2:
<a name="l00584"></a>00584 *(Uint16 *)dstpixel = mapped;
<a name="l00585"></a>00585 <span class="keywordflow">break</span>;
<a name="l00586"></a>00586 <span class="keywordflow">case</span> 3:
<a name="l00587"></a>00587 <span class="preprocessor">#if SDL_BYTEORDER == SDL_BIG_ENDIAN</span>
<a name="l00588"></a>00588 <span class="preprocessor"></span> dstpixel[0] = (mapped >> 16) & 0xff;
<a name="l00589"></a>00589 dstpixel[1] = (mapped >> 8) & 0xff;
<a name="l00590"></a>00590 dstpixel[2] = (mapped >> 0) & 0xff;
<a name="l00591"></a>00591 <span class="preprocessor">#else</span>
<a name="l00592"></a>00592 <span class="preprocessor"></span> dstpixel[0] = (mapped >> 0) & 0xff;
<a name="l00593"></a>00593 dstpixel[1] = (mapped >> 8) & 0xff;
<a name="l00594"></a>00594 dstpixel[2] = (mapped >> 16) & 0xff;
<a name="l00595"></a>00595 <span class="preprocessor">#endif</span>
<a name="l00596"></a>00596 <span class="preprocessor"></span> <span class="keywordflow">break</span>;
<a name="l00597"></a>00597 <span class="keywordflow">case</span> 4:
<a name="l00598"></a>00598 *(Uint32 *)dstpixel = mapped;
<a name="l00599"></a>00599 <span class="keywordflow">break</span>;
<a name="l00600"></a>00600 }
<a name="l00601"></a>00601 }
<a name="l00602"></a>00602 }
<a name="l00603"></a>00603 <span class="keywordflow">if</span>(SDL_MUSTLOCK(dst)) {
<a name="l00604"></a>00604 SDL_UnlockSurface(dst);
<a name="l00605"></a>00605 }
<a name="l00606"></a>00606 <span class="keywordflow">if</span>(SDL_MUSTLOCK(src)) {
<a name="l00607"></a>00607 SDL_UnlockSurface(src);
<a name="l00608"></a>00608 }
<a name="l00609"></a>00609 <span class="comment">// Using the per surface alpha value does not</span>
<a name="l00610"></a>00610 <span class="comment">// work out for mostly transparent pixels.</span>
<a name="l00611"></a>00611 <span class="comment">// Thus disabling the part here - this needs a</span>
<a name="l00612"></a>00612 <span class="comment">// more complex refactoring.</span>
<a name="l00613"></a>00613 <span class="comment">// if(avgalpha < 240) {</span>
<a name="l00614"></a>00614 <span class="comment">// SDL_SetAlpha(dst, SDL_SRCALPHA | SDL_RLEACCEL, avgalpha);</span>
<a name="l00615"></a>00615 <span class="comment">//}</span>
<a name="l00616"></a>00616 SDL_SetColorKey(dst, SDL_SRCCOLORKEY | SDL_RLEACCEL, key);
<a name="l00617"></a>00617 SDL_Surface *convert = SDL_DisplayFormat(dst);
<a name="l00618"></a>00618 SDL_FreeSurface(dst);
<a name="l00619"></a>00619 FL_DBG(_log, LMsg(<span class="stringliteral">"sdlimage "</span>)
<a name="l00620"></a>00620 << <span class="stringliteral">"Trying to alpha-optimize image. SUCCESS: colorkey is "</span> << key);
<a name="l00621"></a>00621 <span class="keywordflow">return</span> convert;
<a name="l00622"></a>00622 } <span class="comment">// end optimize</span>
<a name="l00623"></a>00623
<a name="l00624"></a>00624 <span class="keywordtype">bool</span> SDLImage::putPixel(<span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y, <span class="keywordtype">int</span> r, <span class="keywordtype">int</span> g, <span class="keywordtype">int</span> b, <span class="keywordtype">int</span> a) {
<a name="l00625"></a>00625 <span class="keywordflow">if</span> ((x < 0) || (x >= m_surface->w) || (y < 0) || (y >= m_surface->h)) {
<a name="l00626"></a>00626 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00627"></a>00627 }
<a name="l00628"></a>00628
<a name="l00629"></a>00629 <span class="keywordtype">int</span> bpp = m_surface->format->BytesPerPixel;
<a name="l00630"></a>00630 SDL_LockSurface(m_surface);
<a name="l00631"></a>00631 Uint8* p = (Uint8*)m_surface->pixels + y * m_surface->pitch + x * bpp;
<a name="l00632"></a>00632 Uint32 pixel = SDL_MapRGB(m_surface->format, r, g, b);
<a name="l00633"></a>00633 <span class="keywordflow">switch</span>(bpp)
<a name="l00634"></a>00634 {
<a name="l00635"></a>00635 <span class="keywordflow">case</span> 1:
<a name="l00636"></a>00636 *p = pixel;
<a name="l00637"></a>00637 <span class="keywordflow">break</span>;
<a name="l00638"></a>00638
<a name="l00639"></a>00639 <span class="keywordflow">case</span> 2:
<a name="l00640"></a>00640 *(Uint16 *)p = pixel;
<a name="l00641"></a>00641 <span class="keywordflow">break</span>;
<a name="l00642"></a>00642
<a name="l00643"></a>00643 <span class="keywordflow">case</span> 3:
<a name="l00644"></a>00644 <span class="keywordflow">if</span>(SDL_BYTEORDER == SDL_BIG_ENDIAN) {
<a name="l00645"></a>00645 p[0] = (pixel >> 16) & 0xff;
<a name="l00646"></a>00646 p[1] = (pixel >> 8) & 0xff;
<a name="l00647"></a>00647 p[2] = pixel & 0xff;
<a name="l00648"></a>00648 }
<a name="l00649"></a>00649 <span class="keywordflow">else</span> {
<a name="l00650"></a>00650 p[0] = pixel & 0xff;
<a name="l00651"></a>00651 p[1] = (pixel >> 8) & 0xff;
<a name="l00652"></a>00652 p[2] = (pixel >> 16) & 0xff;
<a name="l00653"></a>00653 }
<a name="l00654"></a>00654 <span class="keywordflow">break</span>;
<a name="l00655"></a>00655
<a name="l00656"></a>00656 <span class="keywordflow">case</span> 4:
<a name="l00657"></a>00657 *(Uint32 *)p = pixel;
<a name="l00658"></a>00658 <span class="keywordflow">break</span>;
<a name="l00659"></a>00659 }
<a name="l00660"></a>00660 SDL_UnlockSurface(m_surface);
<a name="l00661"></a>00661 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00662"></a>00662 }
<a name="l00663"></a>00663
<a name="l00664"></a>00664 <span class="keywordtype">void</span> SDLImage::drawLine(<span class="keyword">const</span> Point& p1, <span class="keyword">const</span> Point& p2, <span class="keywordtype">int</span> r, <span class="keywordtype">int</span> g, <span class="keywordtype">int</span> b, <span class="keywordtype">int</span> a) {
<a name="l00665"></a>00665 <span class="comment">// Draw a line with Bresenham, imitated from guichan</span>
<a name="l00666"></a>00666 <span class="keywordtype">int</span> x1 = p1.x;
<a name="l00667"></a>00667 <span class="keywordtype">int</span> x2 = p2.x;
<a name="l00668"></a>00668 <span class="keywordtype">int</span> y1 = p1.y;
<a name="l00669"></a>00669 <span class="keywordtype">int</span> y2 = p2.y;
<a name="l00670"></a>00670 <span class="keywordtype">int</span> dx = ABS(x2 - x1);
<a name="l00671"></a>00671 <span class="keywordtype">int</span> dy = ABS(y2 - y1);
<a name="l00672"></a>00672
<a name="l00673"></a>00673 <span class="keywordflow">if</span> (dx > dy) {
<a name="l00674"></a>00674 <span class="keywordflow">if</span> (x1 > x2) {
<a name="l00675"></a>00675 <span class="comment">// swap x1, x2</span>
<a name="l00676"></a>00676 x1 ^= x2;
<a name="l00677"></a>00677 x2 ^= x1;
<a name="l00678"></a>00678 x1 ^= x2;
<a name="l00679"></a>00679
<a name="l00680"></a>00680 <span class="comment">// swap y1, y2</span>
<a name="l00681"></a>00681 y1 ^= y2;
<a name="l00682"></a>00682 y2 ^= y1;
<a name="l00683"></a>00683 y1 ^= y2;
<a name="l00684"></a>00684 }
<a name="l00685"></a>00685
<a name="l00686"></a>00686 <span class="keywordflow">if</span> (y1 < y2) {
<a name="l00687"></a>00687 <span class="keywordtype">int</span> y = y1;
<a name="l00688"></a>00688 <span class="keywordtype">int</span> p = 0;
<a name="l00689"></a>00689
<a name="l00690"></a>00690 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> x = x1; x <= x2; x++) {
<a name="l00691"></a>00691 putPixel(x, y, r, g, b, a);
<a name="l00692"></a>00692 p += dy;
<a name="l00693"></a>00693 <span class="keywordflow">if</span> (p * 2 >= dx) {
<a name="l00694"></a>00694 y++;
<a name="l00695"></a>00695 p -= dx;
<a name="l00696"></a>00696 }
<a name="l00697"></a>00697 }
<a name="l00698"></a>00698 }
<a name="l00699"></a>00699 <span class="keywordflow">else</span> {
<a name="l00700"></a>00700 <span class="keywordtype">int</span> y = y1;
<a name="l00701"></a>00701 <span class="keywordtype">int</span> p = 0;
<a name="l00702"></a>00702
<a name="l00703"></a>00703 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> x = x1; x <= x2; x++) {
<a name="l00704"></a>00704 putPixel(x, y, r, g, b, a);
<a name="l00705"></a>00705
<a name="l00706"></a>00706 p += dy;
<a name="l00707"></a>00707 <span class="keywordflow">if</span> (p * 2 >= dx) {
<a name="l00708"></a>00708 y--;
<a name="l00709"></a>00709 p -= dx;
<a name="l00710"></a>00710 }
<a name="l00711"></a>00711 }
<a name="l00712"></a>00712 }
<a name="l00713"></a>00713 }
<a name="l00714"></a>00714 <span class="keywordflow">else</span> {
<a name="l00715"></a>00715 <span class="keywordflow">if</span> (y1 > y2) {
<a name="l00716"></a>00716 <span class="comment">// swap y1, y2</span>
<a name="l00717"></a>00717 y1 ^= y2;
<a name="l00718"></a>00718 y2 ^= y1;
<a name="l00719"></a>00719 y1 ^= y2;
<a name="l00720"></a>00720
<a name="l00721"></a>00721 <span class="comment">// swap x1, x2</span>
<a name="l00722"></a>00722 x1 ^= x2;
<a name="l00723"></a>00723 x2 ^= x1;
<a name="l00724"></a>00724 x1 ^= x2;
<a name="l00725"></a>00725 }
<a name="l00726"></a>00726
<a name="l00727"></a>00727 <span class="keywordflow">if</span> (x1 < x2) {
<a name="l00728"></a>00728 <span class="keywordtype">int</span> x = x1;
<a name="l00729"></a>00729 <span class="keywordtype">int</span> p = 0;
<a name="l00730"></a>00730
<a name="l00731"></a>00731 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> y = y1; y <= y2; y++) {
<a name="l00732"></a>00732 putPixel(x, y, r, g, b, a);
<a name="l00733"></a>00733 p += dx;
<a name="l00734"></a>00734 <span class="keywordflow">if</span> (p * 2 >= dy) {
<a name="l00735"></a>00735 x++;
<a name="l00736"></a>00736 p -= dy;
<a name="l00737"></a>00737 }
<a name="l00738"></a>00738 }
<a name="l00739"></a>00739 }
<a name="l00740"></a>00740 <span class="keywordflow">else</span> {
<a name="l00741"></a>00741 <span class="keywordtype">int</span> x = x1;
<a name="l00742"></a>00742 <span class="keywordtype">int</span> p = 0;
<a name="l00743"></a>00743
<a name="l00744"></a>00744 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> y = y1; y <= y2; y++) {
<a name="l00745"></a>00745 putPixel(x, y, r, g, b, a);
<a name="l00746"></a>00746 p += dx;
<a name="l00747"></a>00747 <span class="keywordflow">if</span> (p * 2 >= dy) {
<a name="l00748"></a>00748 x--;
<a name="l00749"></a>00749 p -= dy;
<a name="l00750"></a>00750 }
<a name="l00751"></a>00751 }
<a name="l00752"></a>00752 }
<a name="l00753"></a>00753 }
<a name="l00754"></a>00754 }
<a name="l00755"></a>00755
<a name="l00756"></a>00756 <span class="keywordtype">void</span> SDLImage::drawTriangle(<span class="keyword">const</span> Point& p1, <span class="keyword">const</span> Point& p2, <span class="keyword">const</span> Point& p3, <span class="keywordtype">int</span> r, <span class="keywordtype">int</span> g, <span class="keywordtype">int</span> b, <span class="keywordtype">int</span> a) {
<a name="l00757"></a>00757 drawLine(p1, p2, r, g, b, a);
<a name="l00758"></a>00758 drawLine(p2, p3, r, g, b, a);
<a name="l00759"></a>00759 drawLine(p3, p1, r, g, b, a);
<a name="l00760"></a>00760 }
<a name="l00761"></a>00761
<a name="l00762"></a>00762 <span class="keywordtype">void</span> SDLImage::drawRectangle(<span class="keyword">const</span> Point& p, uint16_t w, uint16_t h, uint8_t r, uint8_t g, uint8_t b, uint8_t a) {
<a name="l00763"></a>00763 Point p1, p2, p3, p4;
<a name="l00764"></a>00764
<a name="l00765"></a>00765 p1.x = p.x;
<a name="l00766"></a>00766 p1.y = p.y;
<a name="l00767"></a>00767 p2.x = p.x+w;
<a name="l00768"></a>00768 p2.y = p.y;
<a name="l00769"></a>00769 p3.x = p.x+w;
<a name="l00770"></a>00770 p3.y = p.y+h;
<a name="l00771"></a>00771 p4.x = p.x;
<a name="l00772"></a>00772 p4.y = p.y+h;
<a name="l00773"></a>00773
<a name="l00774"></a>00774 drawLine(p1, p2, r, g, b, a);
<a name="l00775"></a>00775 drawLine(p2, p3, r, g, b, a);
<a name="l00776"></a>00776 drawLine(p3, p4, r, g, b, a);
<a name="l00777"></a>00777 drawLine(p4, p1, r, g, b, a);
<a name="l00778"></a>00778 }
<a name="l00779"></a>00779
<a name="l00780"></a>00780 <span class="keywordtype">void</span> SDLImage::fillRectangle(<span class="keyword">const</span> Point& p, uint16_t w, uint16_t h, uint8_t r, uint8_t g, uint8_t b, uint8_t a) {
<a name="l00781"></a>00781 SDL_Rect rect;
<a name="l00782"></a>00782 rect.x = p.x;
<a name="l00783"></a>00783 rect.y = p.y;
<a name="l00784"></a>00784 rect.w = w;
<a name="l00785"></a>00785 rect.h = h;
<a name="l00786"></a>00786
<a name="l00787"></a>00787 Uint32 color = SDL_MapRGBA(m_surface->format, r, g, b, a);
<a name="l00788"></a>00788 SDL_FillRect(m_surface, &rect, color);
<a name="l00789"></a>00789 }
<a name="l00790"></a>00790
<a name="l00791"></a>00791 <span class="keywordtype">void</span> SDLImage::drawQuad(<span class="keyword">const</span> Point& p1, <span class="keyword">const</span> Point& p2, <span class="keyword">const</span> Point& p3, <span class="keyword">const</span> Point& p4, <span class="keywordtype">int</span> r, <span class="keywordtype">int</span> g, <span class="keywordtype">int</span> b, <span class="keywordtype">int</span> a) {
<a name="l00792"></a>00792 drawLine(p1, p2, r, g, b, a);
<a name="l00793"></a>00793 drawLine(p2, p3, r, g, b, a);
<a name="l00794"></a>00794 drawLine(p3, p4, r, g, b, a);
<a name="l00795"></a>00795 drawLine(p4, p1, r, g, b, a);
<a name="l00796"></a>00796 }
<a name="l00797"></a>00797
<a name="l00798"></a>00798 <span class="keywordtype">void</span> SDLImage::drawVertex(<span class="keyword">const</span> Point& p, <span class="keyword">const</span> uint8_t size, <span class="keywordtype">int</span> r, <span class="keywordtype">int</span> g, <span class="keywordtype">int</span> b, <span class="keywordtype">int</span> a){
<a name="l00799"></a>00799 Point p1 = Point(p.x-size, p.y+size);
<a name="l00800"></a>00800 Point p2 = Point(p.x+size, p.y+size);
<a name="l00801"></a>00801 Point p3 = Point(p.x+size, p.y-size);
<a name="l00802"></a>00802 Point p4 = Point(p.x-size, p.y-size);
<a name="l00803"></a>00803
<a name="l00804"></a>00804 drawLine(p1, p2, r, g, b, a);
<a name="l00805"></a>00805 drawLine(p2, p3, r, g, b, a);
<a name="l00806"></a>00806 drawLine(p3, p4, r, g, b, a);
<a name="l00807"></a>00807 drawLine(p4, p1, r, g, b, a);
<a name="l00808"></a>00808 }
<a name="l00809"></a>00809
<a name="l00810"></a>00810 <span class="keywordtype">void</span> SDLImage::drawLightPrimitive(<span class="keyword">const</span> Point& p, uint8_t intensity, <span class="keywordtype">float</span> radius, <span class="keywordtype">int</span> subdivisions, <span class="keywordtype">float</span> xstretch, <span class="keywordtype">float</span> ystretch, uint8_t red, uint8_t green, uint8_t blue) {
<a name="l00811"></a>00811 }
<a name="l00812"></a>00812
<a name="l00813"></a>00813 <span class="keywordtype">void</span> SDLImage::saveImage(<span class="keyword">const</span> std::string& filename) {
<a name="l00814"></a>00814 <span class="keywordflow">if</span>(m_surface) {
<a name="l00815"></a>00815 <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> swidth = getWidth();
<a name="l00816"></a>00816 <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> sheight = getHeight();
<a name="l00817"></a>00817 SDL_Surface *surface = NULL;
<a name="l00818"></a>00818
<a name="l00819"></a>00819 surface = SDL_CreateRGBSurface(SDL_SWSURFACE, swidth,
<a name="l00820"></a>00820 sheight, 24,
<a name="l00821"></a>00821 RMASK, GMASK, BMASK, 0);
<a name="l00822"></a>00822
<a name="l00823"></a>00823 <span class="keywordflow">if</span>(surface == NULL) {
<a name="l00824"></a>00824 <span class="keywordflow">return</span>;
<a name="l00825"></a>00825 }
<a name="l00826"></a>00826
<a name="l00827"></a>00827 SDL_BlitSurface(m_surface, NULL, surface, NULL);
<a name="l00828"></a>00828
<a name="l00829"></a>00829 saveAsPng(filename, *surface);
<a name="l00830"></a>00830 SDL_FreeSurface(surface);
<a name="l00831"></a>00831 }
<a name="l00832"></a>00832 }
<a name="l00833"></a>00833
<a name="l00834"></a><a class="code" href="class_f_i_f_e_1_1_s_d_l_image.html#ac568aa1b14e098292a494f722de31874">00834</a> <span class="keywordtype">void</span> SDLImage::setClipArea(<span class="keyword">const</span> <a class="code" href="class_f_i_f_e_1_1_rect_type.html">Rect</a>& cliparea, <span class="keywordtype">bool</span> clear) {
<a name="l00835"></a>00835 SDL_Rect rect;
<a name="l00836"></a>00836 rect.x = cliparea.<a class="code" href="class_f_i_f_e_1_1_rect_type.html#a1462240577c7175bef3c488844530556">x</a>;
<a name="l00837"></a>00837 rect.y = cliparea.<a class="code" href="class_f_i_f_e_1_1_rect_type.html#a135a0cfb36dec8f6866a21d64834aae9">y</a>;
<a name="l00838"></a>00838 rect.w = cliparea.<a class="code" href="class_f_i_f_e_1_1_rect_type.html#a223da08d1aea81bcaddfe5d21ddbed78">w</a>;
<a name="l00839"></a>00839 rect.h = cliparea.<a class="code" href="class_f_i_f_e_1_1_rect_type.html#ab730362297bd05feec94a6fdfdaa2aab">h</a>;
<a name="l00840"></a>00840 SDL_SetClipRect(m_surface, &rect);
<a name="l00841"></a>00841 <span class="keywordflow">if</span> (clear) {
<a name="l00842"></a>00842 SDL_FillRect(m_surface, &rect, 0x00);
<a name="l00843"></a>00843 }
<a name="l00844"></a>00844 }
<a name="l00845"></a>00845 }
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