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test optional EXT_transform_feedback parameters in VK_Parameter_Zoo

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baldurk
2020-02-03 14:33:15 +00:00
parent d326d61b1e
commit f18cf01671
1 changed files with 26 additions and 0 deletions
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util/test/demos/vk/vk_parameter_zoo.cpp
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@@ -175,6 +175,7 @@ void main()
{
optDevExts.push_back(VK_KHR_DESCRIPTOR_UPDATE_TEMPLATE_EXTENSION_NAME);
optDevExts.push_back(VK_KHR_PUSH_DESCRIPTOR_EXTENSION_NAME);
optDevExts.push_back(VK_EXT_TRANSFORM_FEEDBACK_EXTENSION_NAME);
// initialise, create window, create context, etc
if(!Init())
@@ -185,6 +186,9 @@ void main()
VK_KHR_DESCRIPTOR_UPDATE_TEMPLATE_EXTENSION_NAME) != devExts.end();
bool KHR_push_descriptor = std::find(devExts.begin(), devExts.end(),
VK_KHR_PUSH_DESCRIPTOR_EXTENSION_NAME) != devExts.end();
bool EXT_transform_feedback =
std::find(devExts.begin(), devExts.end(), VK_EXT_TRANSFORM_FEEDBACK_EXTENSION_NAME) !=
devExts.end();
VkDescriptorSetLayout setlayout = createDescriptorSetLayout(vkh::DescriptorSetLayoutCreateInfo({
{0, VK_DESCRIPTOR_TYPE_SAMPLER, 1, VK_SHADER_STAGE_VERTEX_BIT},
@@ -836,6 +840,17 @@ void main()
Submit(99, 99, {cmd});
}
VkBufferUsageFlags xfbUsage = VK_BUFFER_USAGE_TRANSFER_DST_BIT;
if(EXT_transform_feedback)
{
xfbUsage |= VK_BUFFER_USAGE_TRANSFORM_FEEDBACK_BUFFER_BIT_EXT;
xfbUsage |= VK_BUFFER_USAGE_TRANSFORM_FEEDBACK_COUNTER_BUFFER_BIT_EXT;
}
AllocatedBuffer xfbBuf(this, vkh::BufferCreateInfo(256, xfbUsage),
VmaAllocationCreateInfo({0, VMA_MEMORY_USAGE_GPU_ONLY}));
while(Running())
{
// acquire and clear the backbuffer
@@ -1045,6 +1060,17 @@ void main()
setMarker(cmd, "Color Draw");
vkCmdDraw(cmd, 3, 1, 0, 0);
if(EXT_transform_feedback)
{
VkDeviceSize offs = 0;
// pSizes is optional and can be NULL to use the whole buffer size
vkCmdBindTransformFeedbackBuffersEXT(cmd, 0, 1, &xfbBuf.buffer, &offs, NULL);
// pCounterBuffers is also optional
vkCmdBeginTransformFeedbackEXT(cmd, 0, 0, NULL, NULL);
vkCmdEndTransformFeedbackEXT(cmd, 0, 0, NULL, NULL);
}
vkCmdEndRenderPass(cmd);
vkEndCommandBuffer(cmd);