From: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Date: Tue, 2 Jan 2018 02:32:14 +0000 (+0100)
Subject: radv: Allow writing 0 scissors.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=1c78e4f0535f3650acaf19d2ad19e4cc7bc3b0fd;p=mesa.git

radv: Allow writing 0 scissors.

When rasterization is disabled we can have that few.

Fixes: 76603aa90b8 "radv: Drop the default viewport when 0 viewports are given."
Reviewed-by: Dave Airlie <airlied@redhat.com>
---

diff --git a/src/amd/vulkan/si_cmd_buffer.c b/src/amd/vulkan/si_cmd_buffer.c
index 68913ec2ad3..7d75d69a9a8 100644
--- a/src/amd/vulkan/si_cmd_buffer.c
+++ b/src/amd/vulkan/si_cmd_buffer.c
@@ -673,7 +673,8 @@ 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++) {