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authorChris Wilson <chris@chris-wilson.co.uk>2010-06-05 09:33:58 +0100
committerChris Wilson <chris@chris-wilson.co.uk>2010-06-05 09:33:58 +0100
commitadd3260157368458501709d08a3f913ed448234f (patch)
tree786e906b77eb619f23f5ca71ca16ce1c0b145358
parentff74c2ced5e7234902d43712a3759f91fd534a91 (diff)
i915: Fix off-by-one for drawing rectangle.
The drawing rectangle is given in *inclusive* pixel values, so the range is only [0,2047]. Hence when rendering to a 2048 wide target, such as an extended desktop, we would issue an illegal instruction zeroing the draw area. Fixes: Bug 27408: Primary and Secondary display blanks in extended desktop mode with Compiz enabled https://bugs.freedesktop.org/show_bug.cgi?id=27408 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
-rw-r--r--src/mesa/drivers/dri/i915/i915_vtbl.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/mesa/drivers/dri/i915/i915_vtbl.c b/src/mesa/drivers/dri/i915/i915_vtbl.c
index 974ab3ec14..b2f9b90abd 100644
--- a/src/mesa/drivers/dri/i915/i915_vtbl.c
+++ b/src/mesa/drivers/dri/i915/i915_vtbl.c
@@ -627,8 +627,8 @@ i915_set_draw_region(struct intel_context *intel,
state->Buffer[I915_DESTREG_DRAWRECT2] = 0;
state->Buffer[I915_DESTREG_DRAWRECT3] = (draw_y << 16) | draw_x;
state->Buffer[I915_DESTREG_DRAWRECT4] =
- ((ctx->DrawBuffer->Width + draw_x) & 0xffff) |
- ((ctx->DrawBuffer->Height + draw_y) << 16);
+ ((ctx->DrawBuffer->Width + draw_x - 1) & 0xffff) |
+ ((ctx->DrawBuffer->Height + draw_y - 1) << 16);
state->Buffer[I915_DESTREG_DRAWRECT5] = (draw_y << 16) | draw_x;
I915_STATECHANGE(i915, I915_UPLOAD_BUFFERS);