From ee12cc8585dd3147376c734fd5c6b736f5c85dfe Mon Sep 17 00:00:00 2001 From: Sam Lantinga Date: Fri, 12 Jul 2013 00:55:04 -0700 Subject: [PATCH] Fixed bug 1810 - xxx_RenderReadPixels - incorrect behaviour in certain conditions PoopiSan GLES2_RenderReadPixels, GLES_RenderReadPixels, GL_RenderReadPixels and possibly other backends is incorrectly implemented. If the current target viewport is different than window size the function is reading garbage and according to the function documentation should work with any rendering target "Read pixels from the current rendering target.". this seems to be caused by this line: ... SDL_GetWindowSize(window, &w, &h); --- src/render/opengl/SDL_render_gl.c | 3 +-- src/render/opengles/SDL_render_gles.c | 3 +-- src/render/opengles2/SDL_render_gles2.c | 3 +-- 3 files changed, 3 insertions(+), 6 deletions(-) diff --git a/src/render/opengl/SDL_render_gl.c b/src/render/opengl/SDL_render_gl.c index 77248e421..279652f12 100644 --- a/src/render/opengl/SDL_render_gl.c +++ b/src/render/opengl/SDL_render_gl.c @@ -1233,7 +1233,6 @@ GL_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect, Uint32 pixel_format, void * pixels, int pitch) { GL_RenderData *data = (GL_RenderData *) renderer->driverdata; - SDL_Window *window = renderer->window; Uint32 temp_format = SDL_PIXELFORMAT_ARGB8888; void *temp_pixels; int temp_pitch; @@ -1253,7 +1252,7 @@ GL_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect, convert_format(data, temp_format, &internalFormat, &format, &type); - SDL_GetWindowSize(window, &w, &h); + SDL_GetRendererOutputSize(renderer, &w, &h); data->glPixelStorei(GL_PACK_ALIGNMENT, 1); data->glPixelStorei(GL_PACK_ROW_LENGTH, diff --git a/src/render/opengles/SDL_render_gles.c b/src/render/opengles/SDL_render_gles.c index 920b35fb0..0ec21da07 100644 --- a/src/render/opengles/SDL_render_gles.c +++ b/src/render/opengles/SDL_render_gles.c @@ -1006,7 +1006,6 @@ GLES_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect, Uint32 pixel_format, void * pixels, int pitch) { GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata; - SDL_Window *window = renderer->window; Uint32 temp_format = SDL_PIXELFORMAT_ABGR8888; void *temp_pixels; int temp_pitch; @@ -1022,7 +1021,7 @@ GLES_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect, return SDL_OutOfMemory(); } - SDL_GetWindowSize(window, &w, &h); + SDL_GetRendererOutputSize(renderer, &w, &h); data->glPixelStorei(GL_PACK_ALIGNMENT, 1); diff --git a/src/render/opengles2/SDL_render_gles2.c b/src/render/opengles2/SDL_render_gles2.c index f52afc15a..fafc9da59 100644 --- a/src/render/opengles2/SDL_render_gles2.c +++ b/src/render/opengles2/SDL_render_gles2.c @@ -1508,7 +1508,6 @@ GLES2_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect, Uint32 pixel_format, void * pixels, int pitch) { GLES2_DriverContext *rdata = (GLES2_DriverContext *)renderer->driverdata; - SDL_Window *window = renderer->window; Uint32 temp_format = SDL_PIXELFORMAT_ABGR8888; void *temp_pixels; int temp_pitch; @@ -1524,7 +1523,7 @@ GLES2_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect, return SDL_OutOfMemory(); } - SDL_GetWindowSize(window, &w, &h); + SDL_GetRendererOutputSize(renderer, &w, &h); rdata->glPixelStorei(GL_PACK_ALIGNMENT, 1);