Switch OpenGL contexts when switching render contexts.

Query the maximum texture size and show the current render parameters.
libsdl-org · Jul 22, 2006 · 5cec0a9 · 5cec0a9
1 parent 2378445
commit 5cec0a9
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Showing 4 changed files with 31 additions and 9 deletions.
diff --git a/src/video/SDL_renderer_gl.c b/src/video/SDL_renderer_gl.c
@@ -33,6 +33,7 @@
 /* OpenGL renderer implementation */
 
 static SDL_Renderer *GL_CreateRenderer(SDL_Window * window, Uint32 flags);
+static int GL_ActivateRenderer(SDL_Renderer * renderer);
 static int GL_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture);
 static int GL_SetTexturePalette(SDL_Renderer * renderer,
                                 SDL_Texture * texture,
@@ -147,6 +148,7 @@ GL_CreateRenderer(SDL_Window * window, Uint32 flags)
         return NULL;
     }
 
+    renderer->ActivateRenderer = GL_ActivateRenderer;
     renderer->CreateTexture = GL_CreateTexture;
     renderer->SetTexturePalette = GL_SetTexturePalette;
     renderer->GetTexturePalette = GL_GetTexturePalette;
@@ -185,9 +187,8 @@ GL_CreateRenderer(SDL_Window * window, Uint32 flags)
         renderer->info.flags |= SDL_Renderer_PresentVSync;
     }
 
-    /* FIXME: Add a function to make the rendering context current when selecting the renderer */
-
-    /* FIXME: Query maximum texture size */
+    glGetIntegerv(GL_MAX_TEXTURE_SIZE, &renderer->info.max_texture_width);
+    glGetIntegerv(GL_MAX_TEXTURE_SIZE, &renderer->info.max_texture_height);
 
     /* FIXME: Check for GL_ARB_texture_rectangle and GL_EXT_texture_rectangle */
 
@@ -209,6 +210,15 @@ GL_CreateRenderer(SDL_Window * window, Uint32 flags)
     return renderer;
 }
 
+static int
+GL_ActivateRenderer(SDL_Renderer * renderer)
+{
+    GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
+    SDL_Window *window = SDL_GetWindowFromID(renderer->window);
+
+    return SDL_GL_MakeCurrent(window->id, data->context);
+}
+
 static __inline__ int
 power_of_2(int input)
 {

diff --git a/src/video/SDL_sysvideo.h b/src/video/SDL_sysvideo.h
@@ -55,6 +55,7 @@ struct SDL_Texture
 /* Define the SDL renderer structure */
 struct SDL_Renderer
 {
+    int (*ActivateRenderer) (SDL_Renderer * renderer);
     int (*CreateTexture) (SDL_Renderer * renderer, SDL_Texture * texture);
     int (*QueryTexturePixels) (SDL_Renderer * renderer, SDL_Texture * texture,
                                void **pixels, int *pitch);

diff --git a/src/video/SDL_video.c b/src/video/SDL_video.c
@@ -1366,10 +1366,7 @@ SDL_CreateRenderer(SDL_WindowID windowID, int index, Uint32 flags)
     window->renderer =
         SDL_CurrentDisplay.render_drivers[index].CreateRenderer(window,
                                                                 flags);
-    if (!window->renderer) {
-        return -1;
-    }
-    SDL_CurrentDisplay.current_renderer = window->renderer;
+    SDL_SelectRenderer(window->id);
 
     return 0;
 }
@@ -1378,11 +1375,18 @@ int
 SDL_SelectRenderer(SDL_WindowID windowID)
 {
     SDL_Window *window = SDL_GetWindowFromID(windowID);
+    SDL_Renderer *renderer;
 
     if (!window || !window->renderer) {
         return -1;
     }
-    SDL_CurrentDisplay.current_renderer = window->renderer;
+    renderer = window->renderer;
+    if (renderer && renderer->ActivateRenderer) {
+        if (renderer->ActivateRenderer(renderer) < 0) {
+            return -1;
+        }
+    }
+    SDL_CurrentDisplay.current_renderer = renderer;
     return 0;
 }
 

diff --git a/test/common.c b/test/common.c
@@ -610,7 +610,7 @@ CommonInit(CommonState * state)
             if (n == 0) {
                 fprintf(stderr, "No built-in render drivers\n");
             } else {
-                fprintf(stderr, "Built-in render video drivers:\n");
+                fprintf(stderr, "Built-in render drivers:\n");
                 for (i = 0; i < n; ++i) {
                     SDL_GetRendererInfo(i, &info);
                     PrintRenderer(&info);
@@ -690,6 +690,13 @@ CommonInit(CommonState * state)
                             SDL_GetError());
                     return SDL_FALSE;
                 }
+                if (state->verbose & VERBOSE_RENDER) {
+                    SDL_RendererInfo info;
+
+                    fprintf(stderr, "Current renderer:\n");
+                    SDL_GetRendererInfo(-1, &info);
+                    PrintRenderer(&info);
+                }
             }
         }
         SDL_SelectRenderer(state->windows[0]);