Fixed bug 3355 - false "Invalid renderer" after creating an "opengles2" renderer.

Call SDL_GL_GetDrawableSize() directly because we may be in the initialization path and SDL_GetRendererOutputSize() will fail because the renderer magic isn't set up yet.

src/render/opengl/SDL_render_gl.c

@@ -592,7 +592,6 @@ static int
 GL_GetOutputSize(SDL_Renderer * renderer, int *w, int *h)
 {
     SDL_GL_GetDrawableSize(renderer->window, w, h);
-
     return 0;
 }
 
@@ -1020,7 +1019,7 @@ GL_UpdateViewport(SDL_Renderer * renderer)
     } else {
         int w, h;
 
-        SDL_GetRendererOutputSize(renderer, &w, &h);
+        SDL_GL_GetDrawableSize(renderer, &w, &h);
         data->glViewport(renderer->viewport.x, (h - renderer->viewport.y - renderer->viewport.h),
                          renderer->viewport.w, renderer->viewport.h);
     }
@@ -1058,7 +1057,7 @@ GL_UpdateClipRect(SDL_Renderer * renderer)
         } else {
             int w, h;
 
-            SDL_GetRendererOutputSize(renderer, &w, &h);
+            SDL_GL_GetDrawableSize(renderer, &w, &h);
             data->glScissor(renderer->viewport.x + rect->x, h - renderer->viewport.y - rect->y - rect->h, rect->w, rect->h);
         }
     } else {

src/render/opengles/SDL_render_gles.c

@@ -672,7 +672,7 @@ GLES_UpdateViewport(SDL_Renderer * renderer)
     } else {
         int w, h;
 
-        SDL_GetRendererOutputSize(renderer, &w, &h);
+        SDL_GL_GetDrawableSize(renderer, &w, &h);
         data->glViewport(renderer->viewport.x, (h - renderer->viewport.y - renderer->viewport.h),
                          renderer->viewport.w, renderer->viewport.h);
     }
@@ -715,7 +715,7 @@ GLES_UpdateClipRect(SDL_Renderer * renderer)
         } else {
             int w, h;
 
-            SDL_GetRendererOutputSize(renderer, &w, &h);
+            SDL_GL_GetDrawableSize(renderer, &w, &h);
             data->glScissor(renderer->viewport.x + rect->x, h - renderer->viewport.y - rect->y - rect->h, rect->w, rect->h);
         }
     } else {

src/render/opengles2/SDL_render_gles2.c

@@ -388,7 +388,7 @@ GLES2_UpdateViewport(SDL_Renderer * renderer)
     } else {
         int w, h;
 
-        SDL_GetRendererOutputSize(renderer, &w, &h);
+        SDL_GL_GetDrawableSize(renderer->window, &w, &h);
         data->glViewport(renderer->viewport.x, (h - renderer->viewport.y - renderer->viewport.h),
                          renderer->viewport.w, renderer->viewport.h);
     }
@@ -417,7 +417,7 @@ GLES2_UpdateClipRect(SDL_Renderer * renderer)
         } else {
             int w, h;
 
-            SDL_GetRendererOutputSize(renderer, &w, &h);
+            SDL_GL_GetDrawableSize(renderer->window, &w, &h);
             data->glScissor(renderer->viewport.x + rect->x, h - renderer->viewport.y - rect->y - rect->h, rect->w, rect->h);
         }
     } else {