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radv: Allow writing 0 scissors.

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When rasterization is disabled we can have that few.

Fixes: 76603aa90b "radv: Drop the default viewport when 0 viewports are given."
Reviewed-by: Dave Airlie <airlied@redhat.com>
(cherry picked from commit 1c78e4f053)
This commit is contained in:
Bas Nieuwenhuizen 2018-01-02 03:32:14 +01:00 • committed by Juan A. Suarez Romero
parent 467414c5cd
commit 5fe6c5fdfb
1 changed files with 2 additions and 1 deletions
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3
src/amd/vulkan/si_cmd_buffer.c
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@ -676,7 +676,8 @@ si_write_scissors(struct radeon_winsys_cs *cs, int first,
int i;
float scale[3], translate[3], guardband_x = INFINITY, guardband_y = INFINITY;
const float max_range = 32767.0f;
assert(count);
if (!count)
return;
radeon_set_context_reg_seq(cs, R_028250_PA_SC_VPORT_SCISSOR_0_TL + first * 4 * 2, count * 2);
for (i = 0; i < count; i++) {