Fix crash in opengl render caused by gfx being blacklisted for

non-power-of-2 texture support.  Note that all I did was pass
the correct width/height into glReadPixels; the result may not
be the same as if non2 textures were enabled.

3 files changed, 12 insertions, 4 deletions

diff --git a/source/blender/editors/render/render_opengl.c b/source/blender/editors/render/render_opengl.c
index c718dfa9229..1654382e7fc 100644
--- a/source/blender/editors/render/render_opengl.c
+++ b/source/blender/editors/render/render_opengl.c
@@ -324,7 +324,7 @@ static void screen_opengl_render_doit(OGLRender *oglrender, RenderResult *rr)
 			G.f &= ~G_RENDER_OGL;
 
 			gp_rect = MEM_mallocN(sizex * sizey * sizeof(unsigned char) * 4, "offscreen rect");
-			GPU_offscreen_read_pixels(oglrender->ofs, GL_UNSIGNED_BYTE, gp_rect);
+			GPU_offscreen_read_pixels_wh(oglrender->ofs, sizex, sizey, GL_UNSIGNED_BYTE, gp_rect);
 
 			BLI_assert(rectf != NULL);
 
@@ -380,7 +380,7 @@ static void screen_opengl_render_doit(OGLRender *oglrender, RenderResult *rr)
 			        scene, v3d, ar, sizex, sizey, NULL, winmat,
 			        draw_bgpic, draw_sky, is_persp,
 			        oglrender->ofs, oglrender->fx, &fx_settings, viewname);
-			GPU_offscreen_read_pixels(oglrender->ofs, GL_UNSIGNED_BYTE, rect);
+			GPU_offscreen_read_pixels_wh(oglrender->ofs, sizex, sizey, GL_UNSIGNED_BYTE, rect);
 		}
 		else {
 			/* simple accumulation, less hassle then FSAA FBO's */
@@ -396,7 +396,7 @@ static void screen_opengl_render_doit(OGLRender *oglrender, RenderResult *rr)
 			        scene, v3d, ar, sizex, sizey, NULL, winmat,
 			        draw_bgpic, draw_sky, is_persp,
 			        oglrender->ofs, oglrender->fx, &fx_settings, viewname);
-			GPU_offscreen_read_pixels(oglrender->ofs, GL_UNSIGNED_BYTE, rect);
+			GPU_offscreen_read_pixels_wh(oglrender->ofs, sizex, sizey, GL_UNSIGNED_BYTE, rect);
 
 			for (i = 0; i < sizex * sizey * 4; i++)
 				accum_buffer[i] = rect[i];
@@ -412,7 +412,7 @@ static void screen_opengl_render_doit(OGLRender *oglrender, RenderResult *rr)
 				        scene, v3d, ar, sizex, sizey, NULL, winmat_jitter,
 				        draw_bgpic, draw_sky, is_persp,
 				        oglrender->ofs, oglrender->fx, &fx_settings, viewname);
-				GPU_offscreen_read_pixels(oglrender->ofs, GL_UNSIGNED_BYTE, rect);
+				GPU_offscreen_read_pixels_wh(oglrender->ofs, sizex, sizey, GL_UNSIGNED_BYTE, rect);
 
 				for (i = 0; i < sizex * sizey * 4; i++)
 					accum_buffer[i] += rect[i];
diff --git a/source/blender/gpu/GPU_extensions.h b/source/blender/gpu/GPU_extensions.h
index f3927ba960b..3a668c3a4fb 100644
--- a/source/blender/gpu/GPU_extensions.h
+++ b/source/blender/gpu/GPU_extensions.h
@@ -184,6 +184,8 @@ void GPU_offscreen_free(GPUOffScreen *ofs);
 void GPU_offscreen_bind(GPUOffScreen *ofs, bool save);
 void GPU_offscreen_unbind(GPUOffScreen *ofs, bool restore);
 void GPU_offscreen_read_pixels(GPUOffScreen *ofs, int type, void *pixels);
+void GPU_offscreen_read_pixels_wh(GPUOffScreen *ofs, int width, int height, int type, void *pixels);
+
 int GPU_offscreen_width(const GPUOffScreen *ofs);
 int GPU_offscreen_height(const GPUOffScreen *ofs);
 
diff --git a/source/blender/gpu/intern/gpu_extensions.c b/source/blender/gpu/intern/gpu_extensions.c
index a6a34296ca2..e69c74bbef8 100644
--- a/source/blender/gpu/intern/gpu_extensions.c
+++ b/source/blender/gpu/intern/gpu_extensions.c
@@ -1473,6 +1473,12 @@ void GPU_offscreen_read_pixels(GPUOffScreen *ofs, int type, void *pixels)
 	glReadPixels(0, 0, ofs->color->w, ofs->color->h, GL_RGBA, type, pixels);
 }
 
+//if non power of two textures are not supported, than ofs->w/h may not be same size as allocated *pixels
+void GPU_offscreen_read_pixels_wh(GPUOffScreen *ofs, int width, int height, int type, void *pixels)
+{
+	glReadPixels(0, 0, width, height, GL_RGBA, type, pixels);
+}
+
 int GPU_offscreen_width(const GPUOffScreen *ofs)
 {
 	return ofs->color->w;