From 22a972a440a33fe7b4bfecf277dbf75b381e0126 Mon Sep 17 00:00:00 2001 From: Sam Lantinga Date: Mon, 30 Sep 2013 22:16:14 -0700 Subject: [PATCH] Fixed bug 2122 - SDL_CreateTexture allows illegal texture sizes Lloyd Bryant SDL_CreateTexture() is succeeding (i.e. returning a valid pointer) when the requested horizontal or vertical size of the texture exceeds the maximum allowed by the render. This results in hard-to-understand errors showing up when later attempting to use that texture (such as with SDL_SetRenderTarget()). --- src/render/SDL_render.c | 5 +++++ src/render/opengles2/SDL_render_gles2.c | 8 ++++++++ 2 files changed, 13 insertions(+) diff --git a/src/render/SDL_render.c b/src/render/SDL_render.c index 8420d2f74..5546d4a61 100644 --- a/src/render/SDL_render.c +++ b/src/render/SDL_render.c @@ -410,6 +410,11 @@ SDL_CreateTexture(SDL_Renderer * renderer, Uint32 format, int access, int w, int SDL_SetError("Texture dimensions can't be 0"); return NULL; } + if ((renderer->info.max_texture_width && w > renderer->info.max_texture_width) || + (renderer->info.max_texture_height && h > renderer->info.max_texture_height)) { + SDL_SetError("Texture dimensions are limited to %dx%d", renderer->info.max_texture_width, renderer->info.max_texture_height); + return NULL; + } texture = (SDL_Texture *) SDL_calloc(1, sizeof(*texture)); if (!texture) { SDL_OutOfMemory(); diff --git a/src/render/opengles2/SDL_render_gles2.c b/src/render/opengles2/SDL_render_gles2.c index 484186e33..10cb42d8f 100644 --- a/src/render/opengles2/SDL_render_gles2.c +++ b/src/render/opengles2/SDL_render_gles2.c @@ -1627,6 +1627,7 @@ GLES2_CreateRenderer(SDL_Window *window, Uint32 flags) #endif Uint32 windowFlags; GLint window_framebuffer; + GLint value; SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES); SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2); @@ -1685,6 +1686,13 @@ GLES2_CreateRenderer(SDL_Window *window, Uint32 flags) renderer->info.flags |= SDL_RENDERER_PRESENTVSYNC; } + value = 0; + rdata->glGetIntegerv(GL_MAX_TEXTURE_SIZE, &value); + renderer->info.max_texture_width = value; + value = 0; + rdata->glGetIntegerv(GL_MAX_TEXTURE_SIZE, &value); + renderer->info.max_texture_height = value; + /* Determine supported shader formats */ /* HACK: glGetInteger is broken on the Zune HD's compositor, so we just hardcode this */ rdata->glGetError();