public unsafe void Begin(
VkCommandBufferUsageFlags commandBufferUsageFlag,
RenderPass renderPass,
Framebuffer framebuffer,
uint subpass = 0
)
{
if (_level != VkCommandBufferLevel.Secondary)
{
throw new Exception("you can only use this method for secondary command buffers");
}
var inheritanceInfo = new VkCommandBufferInheritanceInfo
{
sType = VkStructureType.CommandBufferInheritanceInfo,
renderPass = renderPass.Handle,
framebuffer = framebuffer.Handle
};
var beginInfo = new VkCommandBufferBeginInfo
{
sType = VkStructureType.CommandBufferBeginInfo,
flags = commandBufferUsageFlag,
pInheritanceInfo = &inheritanceInfo
};
if (VulkanNative.vkBeginCommandBuffer(
_handle,
&beginInfo
) != VkResult.Success)
{
throw new Exception("failed to begin command buffer");
}
}
private void CreateCommandBuffers()
{
this.commandBuffers = new VkCommandBuffer[this.swapChainFramebuffers.Length];
VkCommandBufferAllocateInfo allocInfo = new VkCommandBufferAllocateInfo()
{
sType = VkStructureType.VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO,
commandPool = commandPool,
level = VkCommandBufferLevel.VK_COMMAND_BUFFER_LEVEL_PRIMARY,
commandBufferCount = (uint)commandBuffers.Length,
};
fixed(VkCommandBuffer *commandBuffersPtr = &this.commandBuffers[0])
{
Helpers.CheckErrors(VulkanNative.vkAllocateCommandBuffers(this.device, &allocInfo, commandBuffersPtr));
}
// Begin
for (uint i = 0; i < this.commandBuffers.Length; i++)
{
VkCommandBufferBeginInfo beginInfo = new VkCommandBufferBeginInfo()
{
sType = VkStructureType.VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO,
flags = 0, // Optional
pInheritanceInfo = null, // Optional
};
Helpers.CheckErrors(VulkanNative.vkBeginCommandBuffer(this.commandBuffers[i], &beginInfo));
// Pass
VkClearValue clearColor = new VkClearValue()
{
color = new VkClearColorValue(0.0f, 0.0f, 0.0f, 1.0f),
};
VkRenderPassBeginInfo renderPassInfo = new VkRenderPassBeginInfo()
{
sType = VkStructureType.VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO,
renderPass = this.renderPass,
framebuffer = this.swapChainFramebuffers[i],
renderArea = new VkRect2D(0, 0, this.swapChainExtent.width, this.swapChainExtent.height),
clearValueCount = 1,
pClearValues = &clearColor,
};
VulkanNative.vkCmdBeginRenderPass(this.commandBuffers[i], &renderPassInfo, VkSubpassContents.VK_SUBPASS_CONTENTS_INLINE);
// Draw
VulkanNative.vkCmdBindPipeline(this.commandBuffers[i], VkPipelineBindPoint.VK_PIPELINE_BIND_POINT_GRAPHICS, this.graphicsPipeline);
VulkanNative.vkCmdDraw(this.commandBuffers[i], 3, 1, 0, 0);
VulkanNative.vkCmdEndRenderPass(this.commandBuffers[i]);
Helpers.CheckErrors(VulkanNative.vkEndCommandBuffer(this.commandBuffers[i]));
}
}
private void CreateCommandBuffers()
{
var allocInfo = new VkCommandBufferAllocateInfo()
{
sType = VkStructureType.VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO,
commandPool = vkCommandPool,
level = VkCommandBufferLevel.VK_COMMAND_BUFFER_LEVEL_PRIMARY,
commandBufferCount = (uint)vkSwapChainFramebuffers.Length,
};
vkCommandBuffers = new VkCommandBuffer[vkSwapChainFramebuffers.Length];
fixed(VkCommandBuffer *newCommandBuffer = vkCommandBuffers)
VulkanNative.vkAllocateCommandBuffers(vkDevice, &allocInfo, newCommandBuffer);
for (int i = 0; i < vkCommandBuffers.Length; i++)
{
var commandBuffer = vkCommandBuffers[i];
var beginInfo = new VkCommandBufferBeginInfo()
{
sType = VkStructureType.VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO,
flags = VkCommandBufferUsageFlagBits.VK_COMMAND_BUFFER_USAGE_SIMULTANEOUS_USE_BIT,
pInheritanceInfo = null,
};
var result = VulkanNative.vkBeginCommandBuffer(commandBuffer, &beginInfo);
Helpers.CheckErrors(result);
VkClearValue clearColor = new VkClearValue()
{
color = new VkClearColorValue(0, 0, 0, 1f),
};
var renderPassInfo = new VkRenderPassBeginInfo()
{
sType = VkStructureType.VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO,
renderPass = vkRenderPass,
framebuffer = vkSwapChainFramebuffers[i],
renderArea = new VkRect2D()
{
extent = vkSwapChainExtent
},
pClearValues = &clearColor,
clearValueCount = 1,
};
VulkanNative.vkCmdBeginRenderPass(commandBuffer, &renderPassInfo, VkSubpassContents.VK_SUBPASS_CONTENTS_INLINE);
VulkanNative.vkCmdBindPipeline(commandBuffer, VkPipelineBindPoint.VK_PIPELINE_BIND_POINT_GRAPHICS, vkGraphicsPipeline);
VulkanNative.vkCmdDraw(commandBuffer, 3, 1, 0, 0);
VulkanNative.vkCmdEndRenderPass(commandBuffer);
result = VulkanNative.vkEndCommandBuffer(commandBuffer);
Helpers.CheckErrors(result);
}
}
public unsafe void Begin(VkCommandBufferUsageFlags commandBufferUsageFlag)
{
if (_level != VkCommandBufferLevel.Primary)
{
throw new Exception("you can only use this method for primary command buffers");
}
var beginInfo = new VkCommandBufferBeginInfo
{
sType = VkStructureType.CommandBufferBeginInfo,
flags = commandBufferUsageFlag
};
if (VulkanNative.vkBeginCommandBuffer(
_handle,
&beginInfo
) != VkResult.Success)
{
throw new Exception("failed to begin command buffer");
}
}
