claude_code/procedural-3d-engine
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Triangle example code cleanup, use VK_CHECK_RESULT macro instead of asserts, added more comments

Browse source
This commit is contained in:
saschawillems 2016-05-11 20:39:22 +02:00
parent a9f280016f
commit 4a124d75a3
4 changed files with 92 additions and 94 deletions
Download patch file Download diff file Expand all files Collapse all files

BIN
data/shaders/triangle.frag.spv
View file

Binary file not shown.

6
data/shaders/triangle.vert
View file

@ -15,6 +15,12 @@ layout (binding = 0) uniform UBO
layout (location = 0) out vec3 outColor;
out gl_PerVertex
{
vec4 gl_Position;
};
void main()
{
outColor = inColor;

BIN
data/shaders/triangle.vert.spv
View file

Binary file not shown.

178
triangle/triangle.cpp
View file

@ -133,16 +133,16 @@ public:
renderPassBeginInfo.clearValueCount = 2;
renderPassBeginInfo.pClearValues = clearValues;
VkResult err;
for (int32_t i = 0; i < drawCmdBuffers.size(); ++i)
{
// Set target frame buffer
renderPassBeginInfo.framebuffer = frameBuffers[i];
err = vkBeginCommandBuffer(drawCmdBuffers[i], &cmdBufInfo);
assert(!err);
VK_CHECK_RESULT(vkBeginCommandBuffer(drawCmdBuffers[i], &cmdBufInfo));
// Start the first sub pass specified in our default render pass setup by the base class
// This will clear the color and depth attachment
vkCmdBeginRenderPass(drawCmdBuffers[i], &renderPassBeginInfo, VK_SUBPASS_CONTENTS_INLINE);
// Update dynamic viewport state
@ -204,17 +204,14 @@ public:
0, nullptr,
1, &prePresentBarrier);
err = vkEndCommandBuffer(drawCmdBuffers[i]);
assert(!err);
VK_CHECK_RESULT(vkEndCommandBuffer(drawCmdBuffers[i]));
}
}
void draw()
{
VkResult err;
// Get next image in the swap chain (back/front buffer)
err = swapChain.acquireNextImage(semaphores.presentComplete, &currentBuffer);
assert(!err);
VK_CHECK_RESULT(swapChain.acquireNextImage(semaphores.presentComplete, &currentBuffer));
// Add a post present image memory barrier
// This will transform the frame buffer color attachment back
@ -236,8 +233,7 @@ public:
VkCommandBufferBeginInfo cmdBufInfo = {};
cmdBufInfo.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
err = vkBeginCommandBuffer(postPresentCmdBuffer, &cmdBufInfo);
assert(!err);
VK_CHECK_RESULT(vkBeginCommandBuffer(postPresentCmdBuffer, &cmdBufInfo));
// Put post present barrier into command buffer
vkCmdPipelineBarrier(
@ -249,19 +245,19 @@ public:
0, nullptr,
1, &postPresentBarrier);
err = vkEndCommandBuffer(postPresentCmdBuffer);
assert(!err);
VK_CHECK_RESULT(vkEndCommandBuffer(postPresentCmdBuffer));
// Submit to the queue
// Submit the image barrier to the current queue
submitInfo = {};
submitInfo.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
submitInfo.commandBufferCount = 1;
submitInfo.pCommandBuffers = &postPresentCmdBuffer;
err = vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE);
assert(!err);
err = vkQueueWaitIdle(queue);
assert(!err);
VK_CHECK_RESULT(vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE));
// Make sure that the image barrier command submitted to the queue
// has finished executing
VK_CHECK_RESULT(vkQueueWaitIdle(queue));
// The submit infor strcuture contains a list of
// command buffers and semaphores to be submitted to a queue
@ -284,15 +280,13 @@ public:
submitInfo.pSignalSemaphores = &semaphores.renderComplete;
// Submit to the graphics queue
err = vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE);
assert(!err);
VK_CHECK_RESULT(vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE));
// Present the current buffer to the swap chain
// We pass the signal semaphore from the submit info
// to ensure that the image is not rendered until
// all commands have been submitted
err = swapChain.queuePresent(queue, currentBuffer, semaphores.renderComplete);
assert(!err);
VK_CHECK_RESULT(swapChain.queuePresent(queue, currentBuffer, semaphores.renderComplete));
}
// Create synchronzation semaphores
@ -304,13 +298,11 @@ public:
// This semaphore ensures that the image is complete
// before starting to submit again
VkResult err = vkCreateSemaphore(device, &semaphoreCreateInfo, nullptr, &semaphores.presentComplete);
assert(!err);
VK_CHECK_RESULT(vkCreateSemaphore(device, &semaphoreCreateInfo, nullptr, &semaphores.presentComplete));
// This semaphore ensures that all commands submitted
// have been finished before submitting the image to the queue
err = vkCreateSemaphore(device, &semaphoreCreateInfo, nullptr, &semaphores.renderComplete);
assert(!err);
VK_CHECK_RESULT(vkCreateSemaphore(device, &semaphoreCreateInfo, nullptr, &semaphores.renderComplete));
}
// Setups vertex and index buffers for an indexed triangle,
@ -352,6 +344,8 @@ public:
// - Copy the data to this buffer
// - Create another buffer that's local on the device (VRAM) with the same size
// - Copy the data from the host to the device using a command buffer
// - Delete the host visible (staging) buffer
// - Use the device local buffers for rendering
struct StagingBuffer {
VkDeviceMemory memory;
@ -371,7 +365,7 @@ public:
cmdBufInfo.commandBufferCount = 1;
VkCommandBuffer copyCommandBuffer;
vkTools::checkResult(vkAllocateCommandBuffers(device, &cmdBufInfo, &copyCommandBuffer));
VK_CHECK_RESULT(vkAllocateCommandBuffers(device, &cmdBufInfo, &copyCommandBuffer));
// Vertex buffer
VkBufferCreateInfo vertexBufferInfo = {};
@ -380,52 +374,51 @@ public:
// Buffer is used as the copy source
vertexBufferInfo.usage = VK_BUFFER_USAGE_TRANSFER_SRC_BIT;
// Create a host-visible buffer to copy the vertex data to (staging buffer)
vkTools::checkResult(vkCreateBuffer(device, &vertexBufferInfo, nullptr, &stagingBuffers.vertices.buffer));
VK_CHECK_RESULT(vkCreateBuffer(device, &vertexBufferInfo, nullptr, &stagingBuffers.vertices.buffer));
vkGetBufferMemoryRequirements(device, stagingBuffers.vertices.buffer, &memReqs);
memAlloc.allocationSize = memReqs.size;
getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT, &memAlloc.memoryTypeIndex);
vkTools::checkResult(vkAllocateMemory(device, &memAlloc, nullptr, &stagingBuffers.vertices.memory));
memAlloc.memoryTypeIndex = getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT);
VK_CHECK_RESULT(vkAllocateMemory(device, &memAlloc, nullptr, &stagingBuffers.vertices.memory));
// Map and copy
vkTools::checkResult(vkMapMemory(device, stagingBuffers.vertices.memory, 0, memAlloc.allocationSize, 0, &data));
VK_CHECK_RESULT(vkMapMemory(device, stagingBuffers.vertices.memory, 0, memAlloc.allocationSize, 0, &data));
memcpy(data, vertexBuffer.data(), vertexBufferSize);
vkUnmapMemory(device, stagingBuffers.vertices.memory);
vkTools::checkResult(vkBindBufferMemory(device, stagingBuffers.vertices.buffer, stagingBuffers.vertices.memory, 0));
VK_CHECK_RESULT(vkBindBufferMemory(device, stagingBuffers.vertices.buffer, stagingBuffers.vertices.memory, 0));
// Create the destination buffer with device only visibility
// Buffer will be used as a vertex buffer and is the copy destination
vertexBufferInfo.usage = VK_BUFFER_USAGE_VERTEX_BUFFER_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT;
vkTools::checkResult(vkCreateBuffer(device, &vertexBufferInfo, nullptr, &vertices.buf));
VK_CHECK_RESULT(vkCreateBuffer(device, &vertexBufferInfo, nullptr, &vertices.buf));
vkGetBufferMemoryRequirements(device, vertices.buf, &memReqs);
memAlloc.allocationSize = memReqs.size;
getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT, &memAlloc.memoryTypeIndex);
vkTools::checkResult(vkAllocateMemory(device, &memAlloc, nullptr, &vertices.mem));
vkTools::checkResult(vkBindBufferMemory(device, vertices.buf, vertices.mem, 0));
memAlloc.memoryTypeIndex = getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
VK_CHECK_RESULT(vkAllocateMemory(device, &memAlloc, nullptr, &vertices.mem));
VK_CHECK_RESULT(vkBindBufferMemory(device, vertices.buf, vertices.mem, 0));
// Index buffer
// todo : comment
VkBufferCreateInfo indexbufferInfo = {};
indexbufferInfo.sType = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO;
indexbufferInfo.size = indexBufferSize;
indexbufferInfo.usage = VK_BUFFER_USAGE_TRANSFER_SRC_BIT;
// Copy index data to a buffer visible to the host (staging buffer)
vkTools::checkResult(vkCreateBuffer(device, &indexbufferInfo, nullptr, &stagingBuffers.indices.buffer));
VK_CHECK_RESULT(vkCreateBuffer(device, &indexbufferInfo, nullptr, &stagingBuffers.indices.buffer));
vkGetBufferMemoryRequirements(device, stagingBuffers.indices.buffer, &memReqs);
memAlloc.allocationSize = memReqs.size;
getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT, &memAlloc.memoryTypeIndex);
vkTools::checkResult(vkAllocateMemory(device, &memAlloc, nullptr, &stagingBuffers.indices.memory));
vkTools::checkResult(vkMapMemory(device, stagingBuffers.indices.memory, 0, indexBufferSize, 0, &data));
memAlloc.memoryTypeIndex = getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT);
VK_CHECK_RESULT(vkAllocateMemory(device, &memAlloc, nullptr, &stagingBuffers.indices.memory));
VK_CHECK_RESULT(vkMapMemory(device, stagingBuffers.indices.memory, 0, indexBufferSize, 0, &data));
memcpy(data, indexBuffer.data(), indexBufferSize);
vkUnmapMemory(device, stagingBuffers.indices.memory);
vkTools::checkResult(vkBindBufferMemory(device, stagingBuffers.indices.buffer, stagingBuffers.indices.memory, 0));
VK_CHECK_RESULT(vkBindBufferMemory(device, stagingBuffers.indices.buffer, stagingBuffers.indices.memory, 0));
// Create destination buffer with device only visibility
indexbufferInfo.usage = VK_BUFFER_USAGE_INDEX_BUFFER_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT;
vkTools::checkResult(vkCreateBuffer(device, &indexbufferInfo, nullptr, &indices.buf));
VK_CHECK_RESULT(vkCreateBuffer(device, &indexbufferInfo, nullptr, &indices.buf));
vkGetBufferMemoryRequirements(device, indices.buf, &memReqs);
memAlloc.allocationSize = memReqs.size;
getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT, &memAlloc.memoryTypeIndex);
vkTools::checkResult(vkAllocateMemory(device, &memAlloc, nullptr, &indices.mem));
vkTools::checkResult(vkBindBufferMemory(device, indices.buf, indices.mem, 0));
memAlloc.memoryTypeIndex = getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
VK_CHECK_RESULT(vkAllocateMemory(device, &memAlloc, nullptr, &indices.mem));
VK_CHECK_RESULT(vkBindBufferMemory(device, indices.buf, indices.mem, 0));
indices.count = indexBuffer.size();
VkCommandBufferBeginInfo cmdBufferBeginInfo = {};
@ -437,7 +430,7 @@ public:
// Put buffer region copies into command buffer
// Note that the staging buffer must not be deleted before the copies
// have been submitted and executed
vkTools::checkResult(vkBeginCommandBuffer(copyCommandBuffer, &cmdBufferBeginInfo));
VK_CHECK_RESULT(vkBeginCommandBuffer(copyCommandBuffer, &cmdBufferBeginInfo));
// Vertex buffer
copyRegion.size = vertexBufferSize;
@ -456,7 +449,7 @@ public:
1,
&copyRegion);
vkTools::checkResult(vkEndCommandBuffer(copyCommandBuffer));
VK_CHECK_RESULT(vkEndCommandBuffer(copyCommandBuffer));
// Submit copies to the queue
VkSubmitInfo copySubmitInfo = {};
@ -464,8 +457,8 @@ public:
copySubmitInfo.commandBufferCount = 1;
copySubmitInfo.pCommandBuffers = &copyCommandBuffer;
vkTools::checkResult(vkQueueSubmit(queue, 1, &copySubmitInfo, VK_NULL_HANDLE));
vkTools::checkResult(vkQueueWaitIdle(queue));
VK_CHECK_RESULT(vkQueueSubmit(queue, 1, &copySubmitInfo, VK_NULL_HANDLE));
VK_CHECK_RESULT(vkQueueWaitIdle(queue));
vkFreeCommandBuffers(device, cmdPool, 1, &copyCommandBuffer);
@ -480,7 +473,8 @@ public:
// Don't use staging
// Create host-visible buffers only and use these for rendering
// This is not advised for real world applications and will
// result in lower performances
// result in lower performances at least on devices that
// separate between host visible and device local memory
// Vertex buffer
VkBufferCreateInfo vertexBufferInfo = {};
@ -489,15 +483,15 @@ public:
vertexBufferInfo.usage = VK_BUFFER_USAGE_VERTEX_BUFFER_BIT;
// Copy vertex data to a buffer visible to the host
vkTools::checkResult(vkCreateBuffer(device, &vertexBufferInfo, nullptr, &vertices.buf));
VK_CHECK_RESULT(vkCreateBuffer(device, &vertexBufferInfo, nullptr, &vertices.buf));
vkGetBufferMemoryRequirements(device, vertices.buf, &memReqs);
memAlloc.allocationSize = memReqs.size;
getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT, &memAlloc.memoryTypeIndex);
vkTools::checkResult(vkAllocateMemory(device, &memAlloc, nullptr, &vertices.mem));
vkTools::checkResult(vkMapMemory(device, vertices.mem, 0, memAlloc.allocationSize, 0, &data));
memAlloc.memoryTypeIndex = getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT);
VK_CHECK_RESULT(vkAllocateMemory(device, &memAlloc, nullptr, &vertices.mem));
VK_CHECK_RESULT(vkMapMemory(device, vertices.mem, 0, memAlloc.allocationSize, 0, &data));
memcpy(data, vertexBuffer.data(), vertexBufferSize);
vkUnmapMemory(device, vertices.mem);
vkTools::checkResult(vkBindBufferMemory(device, vertices.buf, vertices.mem, 0));
VK_CHECK_RESULT(vkBindBufferMemory(device, vertices.buf, vertices.mem, 0));
// Index buffer
VkBufferCreateInfo indexbufferInfo = {};
@ -507,15 +501,15 @@ public:
// Copy index data to a buffer visible to the host
memset(&indices, 0, sizeof(indices));
vkTools::checkResult(vkCreateBuffer(device, &indexbufferInfo, nullptr, &indices.buf));
VK_CHECK_RESULT(vkCreateBuffer(device, &indexbufferInfo, nullptr, &indices.buf));
vkGetBufferMemoryRequirements(device, indices.buf, &memReqs);
memAlloc.allocationSize = memReqs.size;
getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT, &memAlloc.memoryTypeIndex);
vkTools::checkResult(vkAllocateMemory(device, &memAlloc, nullptr, &indices.mem));
vkTools::checkResult(vkMapMemory(device, indices.mem, 0, indexBufferSize, 0, &data));
memAlloc.memoryTypeIndex = getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT);
VK_CHECK_RESULT(vkAllocateMemory(device, &memAlloc, nullptr, &indices.mem));
VK_CHECK_RESULT(vkMapMemory(device, indices.mem, 0, indexBufferSize, 0, &data));
memcpy(data, indexBuffer.data(), indexBufferSize);
vkUnmapMemory(device, indices.mem);
vkTools::checkResult(vkBindBufferMemory(device, indices.buf, indices.mem, 0));
VK_CHECK_RESULT(vkBindBufferMemory(device, indices.buf, indices.mem, 0));
indices.count = indexBuffer.size();
}
@ -539,7 +533,7 @@ public:
vertices.attributeDescriptions[1].format = VK_FORMAT_R32G32B32_SFLOAT;
vertices.attributeDescriptions[1].offset = sizeof(float) * 3;
// Assign to vertex buffer
// Assign to vertex input state
vertices.inputState.sType = VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO;
vertices.inputState.pNext = NULL;
vertices.inputState.flags = VK_FLAGS_NONE;
@ -573,8 +567,7 @@ public:
// Requesting descriptors beyond maxSets will result in an error
descriptorPoolInfo.maxSets = 1;
VkResult vkRes = vkCreateDescriptorPool(device, &descriptorPoolInfo, nullptr, &descriptorPool);
assert(!vkRes);
VK_CHECK_RESULT(vkCreateDescriptorPool(device, &descriptorPoolInfo, nullptr, &descriptorPool));
}
void setupDescriptorSetLayout()
@ -598,8 +591,7 @@ public:
descriptorLayout.bindingCount = 1;
descriptorLayout.pBindings = &layoutBinding;
VkResult err = vkCreateDescriptorSetLayout(device, &descriptorLayout, NULL, &descriptorSetLayout);
assert(!err);
VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &descriptorLayout, NULL, &descriptorSetLayout));
// Create the pipeline layout that is used to generate the rendering pipelines that
// are based on this descriptor set layout
@ -611,25 +603,25 @@ public:
pPipelineLayoutCreateInfo.setLayoutCount = 1;
pPipelineLayoutCreateInfo.pSetLayouts = &descriptorSetLayout;
err = vkCreatePipelineLayout(device, &pPipelineLayoutCreateInfo, nullptr, &pipelineLayout);
assert(!err);
VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pPipelineLayoutCreateInfo, nullptr, &pipelineLayout));
}
void setupDescriptorSet()
{
// Update descriptor sets determining the shader binding points
// For every binding point used in a shader there needs to be one
// descriptor set matching that binding point
VkWriteDescriptorSet writeDescriptorSet = {};
// Allocate a new descriptor set from the global descriptor pool
VkDescriptorSetAllocateInfo allocInfo = {};
allocInfo.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO;
allocInfo.descriptorPool = descriptorPool;
allocInfo.descriptorSetCount = 1;
allocInfo.pSetLayouts = &descriptorSetLayout;
VkResult vkRes = vkAllocateDescriptorSets(device, &allocInfo, &descriptorSet);
assert(!vkRes);
VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorSet));
// Update the descriptor set determining the shader binding points
// For every binding point used in a shader there needs to be one
// descriptor set matching that binding point
VkWriteDescriptorSet writeDescriptorSet = {};
// Binding 0 : Uniform buffer
writeDescriptorSet.sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
@ -661,8 +653,6 @@ public:
VkGraphicsPipelineCreateInfo pipelineCreateInfo = {};
VkResult err;
pipelineCreateInfo.sType = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO;
// The layout used for this pipeline
pipelineCreateInfo.layout = pipelineLayout;
@ -767,13 +757,14 @@ public:
pipelineCreateInfo.pDynamicState = &dynamicState;
// Create rendering pipeline
err = vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.solid);
assert(!err);
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.solid));
}
void prepareUniformBuffers()
{
// Prepare and initialize uniform buffer containing shader uniforms
// Prepare and initialize a uniform buffer block containing shader uniforms
// In Vulkan there are no more single uniforms like in GL
// All shader uniforms are passed as uniform buffer blocks
VkMemoryRequirements memReqs;
// Vertex shader uniform buffer block
@ -783,27 +774,24 @@ public:
allocInfo.pNext = NULL;
allocInfo.allocationSize = 0;
allocInfo.memoryTypeIndex = 0;
VkResult err;
bufferInfo.sType = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO;
bufferInfo.size = sizeof(uboVS);
bufferInfo.usage = VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT;
// Create a new buffer
err = vkCreateBuffer(device, &bufferInfo, nullptr, &uniformDataVS.buffer);
assert(!err);
VK_CHECK_RESULT(vkCreateBuffer(device, &bufferInfo, nullptr, &uniformDataVS.buffer));
// Get memory requirements including size, alignment and memory type
vkGetBufferMemoryRequirements(device, uniformDataVS.buffer, &memReqs);
allocInfo.allocationSize = memReqs.size;
// Gets the appropriate memory type for this type of buffer allocation
// Only memory types that are visible to the host
getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT, &allocInfo.memoryTypeIndex);
// Get the memory type index that supports host visibile memory access
// Most implementations offer multiple memory tpyes and selecting the
// correct one to allocate memory from is important
allocInfo.memoryTypeIndex = getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT);
// Allocate memory for the uniform buffer
err = vkAllocateMemory(device, &allocInfo, nullptr, &(uniformDataVS.memory));
assert(!err);
VK_CHECK_RESULT(vkAllocateMemory(device, &allocInfo, nullptr, &(uniformDataVS.memory)));
// Bind memory to buffer
err = vkBindBufferMemory(device, uniformDataVS.buffer, uniformDataVS.memory, 0);
assert(!err);
VK_CHECK_RESULT(vkBindBufferMemory(device, uniformDataVS.buffer, uniformDataVS.memory, 0));
// Store information in the uniform's descriptor
uniformDataVS.descriptor.buffer = uniformDataVS.buffer;
@ -826,12 +814,12 @@ public:
uboVS.modelMatrix = glm::rotate(uboVS.modelMatrix, glm::radians(rotation.z), glm::vec3(0.0f, 0.0f, 1.0f));
// Map uniform buffer and update it
// If you want to keep a handle to the memory and not unmap it afer updating,
// create the memory with the VK_MEMORY_PROPERTY_HOST_COHERENT_BIT
uint8_t *pData;
VkResult err = vkMapMemory(device, uniformDataVS.memory, 0, sizeof(uboVS), 0, (void **)&pData);
assert(!err);
VK_CHECK_RESULT(vkMapMemory(device, uniformDataVS.memory, 0, sizeof(uboVS), 0, (void **)&pData));
memcpy(pData, &uboVS, sizeof(uboVS));
vkUnmapMemory(device, uniformDataVS.memory);
assert(!err);
}
void prepare()
@ -852,13 +840,17 @@ public:
{
if (!prepared)
return;
vkDeviceWaitIdle(device);
draw();
vkDeviceWaitIdle(device);
}
virtual void viewChanged()
{
// Before updating the uniform buffer we want to make
// sure that the device has finished all operations
// In a real-world application you would use synchronization
// objects for this
vkDeviceWaitIdle(device);
// This function is called by the base example class
// each time the view is changed by user input
updateUniformBuffers();