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 68913ec2ad3caf45318b590372d82f7103877437..7d75d69a9a83792d7f7b0ffc3333110cdce770bf 100644 (file)
--- 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++) {