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comparison src/video/SDL_renderer_gl.c @ 3457:06e948183b59

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Found a way to implement mask semantics in OpenGL
author Sam Lantinga <slouken@libsdl.org>
date Thu, 19 Nov 2009 05:33:41 +0000
parents 5a7b5760c875
children 0aed0755d1f1
comparison
equal deleted inserted replaced
3456:6b182cbe38ac 3457:06e948183b59
1053 SDL_AddDirtyRect(&data->dirty, &rects[i]); 1053 SDL_AddDirtyRect(&data->dirty, &rects[i]);
1054 } 1054 }
1055 } 1055 }
1056 1056
1057 static void 1057 static void
1058 GL_SetBlendMode(GL_RenderData * data, int blendMode, int isprimitive) 1058 GL_SetBlendMode(GL_RenderData * data, int blendMode)
1059 { 1059 {
1060 if (blendMode != data->blendMode) { 1060 if (blendMode != data->blendMode) {
1061 switch (blendMode) { 1061 switch (blendMode) {
1062 case SDL_BLENDMODE_NONE: 1062 case SDL_BLENDMODE_NONE:
1063 data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); 1063 data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1064 data->glDisable(GL_BLEND); 1064 data->glDisable(GL_BLEND);
1065 break; 1065 break;
1066 case SDL_BLENDMODE_MASK: 1066 case SDL_BLENDMODE_MASK:
1067 if (isprimitive) { 1067 data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1068 data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); 1068 data->glEnable(GL_BLEND);
1069 data->glDisable(GL_BLEND); 1069 data->glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1070 /* The same as SDL_BLENDMODE_NONE */ 1070 break;
1071 blendMode = SDL_BLENDMODE_NONE;
1072 break;
1073 }
1074 /* fall through */
1075 case SDL_BLENDMODE_BLEND: 1071 case SDL_BLENDMODE_BLEND:
1076 data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); 1072 data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
1077 data->glEnable(GL_BLEND); 1073 data->glEnable(GL_BLEND);
1078 data->glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); 1074 data->glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1079 break; 1075 break;
1095 static int 1091 static int
1096 GL_RenderPoint(SDL_Renderer * renderer, int x, int y) 1092 GL_RenderPoint(SDL_Renderer * renderer, int x, int y)
1097 { 1093 {
1098 GL_RenderData *data = (GL_RenderData *) renderer->driverdata; 1094 GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
1099 1095
1100 GL_SetBlendMode(data, renderer->blendMode, 1); 1096 GL_SetBlendMode(data, renderer->blendMode);
1101 1097
1102 data->glColor4f((GLfloat) renderer->r * inv255f, 1098 data->glColor4f((GLfloat) renderer->r * inv255f,
1103 (GLfloat) renderer->g * inv255f, 1099 (GLfloat) renderer->g * inv255f,
1104 (GLfloat) renderer->b * inv255f, 1100 (GLfloat) renderer->b * inv255f,
1105 (GLfloat) renderer->a * inv255f); 1101 (GLfloat) renderer->a * inv255f);
1114 static int 1110 static int
1115 GL_RenderLine(SDL_Renderer * renderer, int x1, int y1, int x2, int y2) 1111 GL_RenderLine(SDL_Renderer * renderer, int x1, int y1, int x2, int y2)
1116 { 1112 {
1117 GL_RenderData *data = (GL_RenderData *) renderer->driverdata; 1113 GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
1118 1114
1119 GL_SetBlendMode(data, renderer->blendMode, 1); 1115 GL_SetBlendMode(data, renderer->blendMode);
1120 1116
1121 data->glColor4f((GLfloat) renderer->r * inv255f, 1117 data->glColor4f((GLfloat) renderer->r * inv255f,
1122 (GLfloat) renderer->g * inv255f, 1118 (GLfloat) renderer->g * inv255f,
1123 (GLfloat) renderer->b * inv255f, 1119 (GLfloat) renderer->b * inv255f,
1124 (GLfloat) renderer->a * inv255f); 1120 (GLfloat) renderer->a * inv255f);
1139 static int 1135 static int
1140 GL_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect) 1136 GL_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect)
1141 { 1137 {
1142 GL_RenderData *data = (GL_RenderData *) renderer->driverdata; 1138 GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
1143 1139
1144 GL_SetBlendMode(data, renderer->blendMode, 1); 1140 GL_SetBlendMode(data, renderer->blendMode);
1145 1141
1146 data->glColor4f((GLfloat) renderer->r * inv255f, 1142 data->glColor4f((GLfloat) renderer->r * inv255f,
1147 (GLfloat) renderer->g * inv255f, 1143 (GLfloat) renderer->g * inv255f,
1148 (GLfloat) renderer->b * inv255f, 1144 (GLfloat) renderer->b * inv255f,
1149 (GLfloat) renderer->a * inv255f); 1145 (GLfloat) renderer->a * inv255f);
1208 (GLfloat) texture->a * inv255f); 1204 (GLfloat) texture->a * inv255f);
1209 } else { 1205 } else {
1210 data->glColor4f(1.0f, 1.0f, 1.0f, 1.0f); 1206 data->glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
1211 } 1207 }
1212 1208
1213 GL_SetBlendMode(data, texture->blendMode, 0); 1209 GL_SetBlendMode(data, texture->blendMode);
1214 1210
1215 if (texture->scaleMode != data->scaleMode) { 1211 if (texture->scaleMode != data->scaleMode) {
1216 switch (texture->scaleMode) { 1212 switch (texture->scaleMode) {
1217 case SDL_TEXTURESCALEMODE_NONE: 1213 case SDL_TEXTURESCALEMODE_NONE:
1218 case SDL_TEXTURESCALEMODE_FAST: 1214 case SDL_TEXTURESCALEMODE_FAST: