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intel: Skip the flush before read-pixels via blit

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As we will flush when reading the return values of the blit, we can forgo
the earlier flush.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2011-02-11 00:03:48 +00:00
parent c625aa19cb
commit 57ca0803b3
1 changed files with 7 additions and 4 deletions
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11
src/mesa/drivers/dri/intel/intel_pixel_read.c
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@ -80,6 +80,7 @@ do_blit_readpixels(struct gl_context * ctx,
drm_intel_bo *dst_buffer;
GLboolean all;
GLint dst_x, dst_y;
GLuint dirty;
DBG("%s\n", __FUNCTION__);
@ -129,7 +130,9 @@ do_blit_readpixels(struct gl_context * ctx,
return GL_TRUE;
}
dirty = intel->front_buffer_dirty;
intel_prepare_render(intel);
intel->front_buffer_dirty = dirty;
all = (width * height * src->cpp == dst->Base.Size &&
x == 0 && dst_offset == 0);
@ -171,6 +174,10 @@ intelReadPixels(struct gl_context * ctx,
DBG("%s\n", __FUNCTION__);
if (do_blit_readpixels
(ctx, x, y, width, height, format, type, pack, pixels))
return;
intel_flush(ctx);
/* glReadPixels() wont dirty the front buffer, so reset the dirty
@ -179,10 +186,6 @@ intelReadPixels(struct gl_context * ctx,
intel_prepare_render(intel);
intel->front_buffer_dirty = dirty;
if (do_blit_readpixels
(ctx, x, y, width, height, format, type, pack, pixels))
return;
fallback_debug("%s: fallback to swrast\n", __FUNCTION__);
/* Update Mesa state before calling down into _swrast_ReadPixels, as