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radv: Prepare for not using the guard band for lines & points.

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Vulkan Clipping is defined in terms of vertices, the scissor based
clipping happens on pixels. There is a difference with points and
lines, as a vertex can be outside the viewport while some pixels are in.
On Vulkan thoise pixels shouldn't be drawn, while they would be with
the guardband.

Signed-off-by: Bas Nieuwenhuizen <basni@google.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Bas Nieuwenhuizen
2017-03-29 22:58:10 +02:00
parent 76603aa90b
commit 8a53e6e4c5
3 changed files with 32 additions and 0 deletions
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26
src/amd/vulkan/radv_pipeline.c
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@@ -1215,6 +1215,28 @@ radv_pipeline_init_multisample_state(struct radv_pipeline *pipeline,
ms->pa_sc_aa_mask[1] = mask | (mask << 16);
}
static bool
radv_prim_can_use_guardband(enum VkPrimitiveTopology topology)
{
switch (topology) {
case VK_PRIMITIVE_TOPOLOGY_POINT_LIST:
case VK_PRIMITIVE_TOPOLOGY_LINE_LIST:
case VK_PRIMITIVE_TOPOLOGY_LINE_STRIP:
case VK_PRIMITIVE_TOPOLOGY_LINE_LIST_WITH_ADJACENCY:
case VK_PRIMITIVE_TOPOLOGY_LINE_STRIP_WITH_ADJACENCY:
return false;
case VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST:
case VK_PRIMITIVE_TOPOLOGY_TRIANGLE_STRIP:
case VK_PRIMITIVE_TOPOLOGY_TRIANGLE_FAN:
case VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST_WITH_ADJACENCY:
case VK_PRIMITIVE_TOPOLOGY_TRIANGLE_STRIP_WITH_ADJACENCY:
case VK_PRIMITIVE_TOPOLOGY_PATCH_LIST:
return true;
default:
unreachable("unhandled primitive type");
}
}
static uint32_t
si_translate_prim(enum VkPrimitiveTopology topology)
{
@@ -1715,14 +1737,18 @@ radv_pipeline_init(struct radv_pipeline *pipeline,
radv_pipeline_init_raster_state(pipeline, pCreateInfo);
radv_pipeline_init_multisample_state(pipeline, pCreateInfo);
pipeline->graphics.prim = si_translate_prim(pCreateInfo->pInputAssemblyState->topology);
pipeline->graphics.can_use_guardband = radv_prim_can_use_guardband(pCreateInfo->pInputAssemblyState->topology);
if (radv_pipeline_has_gs(pipeline)) {
pipeline->graphics.gs_out = si_conv_gl_prim_to_gs_out(pipeline->shaders[MESA_SHADER_GEOMETRY]->info.gs.output_prim);
pipeline->graphics.can_use_guardband = pipeline->graphics.gs_out == V_028A6C_OUTPRIM_TYPE_TRISTRIP;
} else {
pipeline->graphics.gs_out = si_conv_prim_to_gs_out(pCreateInfo->pInputAssemblyState->topology);
}
if (extra && extra->use_rectlist) {
pipeline->graphics.prim = V_008958_DI_PT_RECTLIST;
pipeline->graphics.gs_out = V_028A6C_OUTPRIM_TYPE_TRISTRIP;
pipeline->graphics.can_use_guardband = true;
}
pipeline->graphics.prim_restart_enable = !!pCreateInfo->pInputAssemblyState->primitiveRestartEnable;
/* prim vertex count will need TESS changes */