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intel: Fix use of freed buffer if glBitmap is called after a swap.

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Regions looked up from the framebuffer are invalid after
intel_prepare_render().

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=30266
Tested-by: Thomas Jones <thomas.jones@utoronto.ca>
(cherry picked from commit 066bee64e1)
This commit is contained in:
Eric Anholt 2011-07-06 11:31:00 -07:00
parent 98af042079
commit d3bfa9bb4a
1 changed files with 4 additions and 3 deletions
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7
src/mesa/drivers/dri/intel/intel_pixel_bitmap.c
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@ -175,7 +175,7 @@ do_blit_bitmap( struct gl_context *ctx,
const GLubyte *bitmap )
{
struct intel_context *intel = intel_context(ctx);
struct intel_region *dst = intel_drawbuf_region(intel);
struct intel_region *dst;
struct gl_framebuffer *fb = ctx->DrawBuffer;
GLfloat tmpColor[4];
GLubyte ubcolor[4];
@ -198,6 +198,9 @@ do_blit_bitmap( struct gl_context *ctx,
return GL_FALSE;
}
intel_prepare_render(intel);
dst = intel_drawbuf_region(intel);
if (!dst)
return GL_FALSE;
@ -226,8 +229,6 @@ do_blit_bitmap( struct gl_context *ctx,
if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F))
return GL_FALSE;
intel_prepare_render(intel);
/* Clip to buffer bounds and scissor. */
if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin,
fb->_Xmax, fb->_Ymax,