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Merge pull request #555 from gary-sweet/deferred_ms_fix

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Fix sample count limits in deferredmultisampling
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Sascha Willems 2019-03-23 09:39:53 +01:00 • committed by GitHub
commit a7cec2a43f
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 23 additions and 7 deletions
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28
examples/deferredmultisampling/deferredmultisampling.cpp
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@ -25,8 +25,6 @@
#define VERTEX_BUFFER_BIND_ID 0
#define ENABLE_VALIDATION false
// todo: check if hardware supports sample number (or select max. supported)
#define SAMPLE_COUNT VK_SAMPLE_COUNT_8_BIT
class VulkanExample : public VulkanExampleBase
{
@ -34,6 +32,7 @@ public:
bool debugDisplay = false;
bool useMSAA = true;
bool useSampleShading = true;
VkSampleCountFlagBits sampleCount = VK_SAMPLE_COUNT_1_BIT;
struct {
struct {
@ -267,7 +266,7 @@ public:
image.extent.depth = 1;
image.mipLevels = 1;
image.arrayLayers = 1;
image.samples = SAMPLE_COUNT;
image.samples = sampleCount;
image.tiling = VK_IMAGE_TILING_OPTIMAL;
image.usage = usage | VK_IMAGE_USAGE_SAMPLED_BIT;
@ -345,7 +344,7 @@ public:
// Init attachment properties
for (uint32_t i = 0; i < 4; ++i)
{
attachmentDescs[i].samples = SAMPLE_COUNT;
attachmentDescs[i].samples = sampleCount;
attachmentDescs[i].loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
attachmentDescs[i].storeOp = VK_ATTACHMENT_STORE_OP_STORE;
attachmentDescs[i].stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
@ -441,6 +440,7 @@ public:
sampler.mipLodBias = 0.0f;
sampler.maxAnisotropy = 1.0f;
sampler.minLod = 0.0f;
sampler.minLod = 0.0f;
sampler.maxLod = 1.0f;
sampler.borderColor = VK_BORDER_COLOR_FLOAT_OPAQUE_WHITE;
VK_CHECK_RESULT(vkCreateSampler(device, &sampler, nullptr, &colorSampler));
@ -925,7 +925,7 @@ public:
specializationEntry.offset = 0;
specializationEntry.size = sizeof(uint32_t);
uint32_t specializationData = SAMPLE_COUNT;
uint32_t specializationData = sampleCount;
VkSpecializationInfo specializationInfo;
specializationInfo.mapEntryCount = 1;
@ -944,8 +944,10 @@ public:
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.deferredNoMSAA));
// Debug display pipeline
specializationData = sampleCount;
shaderStages[0] = loadShader(getAssetPath() + "shaders/deferredmultisampling/debug.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
shaderStages[1] = loadShader(getAssetPath() + "shaders/deferredmultisampling/debug.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
shaderStages[1].pSpecializationInfo = &specializationInfo;
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.debug));
// Offscreen scene rendering pipeline
@ -956,7 +958,7 @@ public:
//rasterizationState.polygonMode = VK_POLYGON_MODE_LINE;
//rasterizationState.lineWidth = 2.0f;
multisampleState.rasterizationSamples = SAMPLE_COUNT;
multisampleState.rasterizationSamples = sampleCount;
multisampleState.alphaToCoverageEnable = VK_TRUE;
// Separate render pass
@ -1129,6 +1131,7 @@ public:
void prepare()
{
VulkanExampleBase::prepare();
sampleCount = getMaxUsableSampleCount();
loadAssets();
setupVertexDescriptions();
prepareOffscreenFramebuffer();
@ -1173,6 +1176,19 @@ public:
}
}
}
// Returns the maximum sample count usable by the platform
VkSampleCountFlagBits getMaxUsableSampleCount()
{
VkSampleCountFlags counts = std::min(deviceProperties.limits.framebufferColorSampleCounts, deviceProperties.limits.framebufferDepthSampleCounts);
if (counts & VK_SAMPLE_COUNT_64_BIT) { return VK_SAMPLE_COUNT_64_BIT; }
if (counts & VK_SAMPLE_COUNT_32_BIT) { return VK_SAMPLE_COUNT_32_BIT; }
if (counts & VK_SAMPLE_COUNT_16_BIT) { return VK_SAMPLE_COUNT_16_BIT; }
if (counts & VK_SAMPLE_COUNT_8_BIT) { return VK_SAMPLE_COUNT_8_BIT; }
if (counts & VK_SAMPLE_COUNT_4_BIT) { return VK_SAMPLE_COUNT_4_BIT; }
if (counts & VK_SAMPLE_COUNT_2_BIT) { return VK_SAMPLE_COUNT_2_BIT; }
return VK_SAMPLE_COUNT_1_BIT;
}
};
VULKAN_EXAMPLE_MAIN()