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// Copyright 2018 The SwiftShader Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "VkFramebuffer.hpp"
#include "VkImageView.hpp"
#include "VkRenderPass.hpp"
#include <algorithm>
#include <memory.h>
namespace vk
{
Framebuffer::Framebuffer(const VkFramebufferCreateInfo* pCreateInfo, void* mem) :
attachmentCount(pCreateInfo->attachmentCount),
attachments(reinterpret_cast<ImageView**>(mem))
{
for(uint32_t i = 0; i < attachmentCount; i++)
{
attachments[i] = Cast(pCreateInfo->pAttachments[i]);
}
}
void Framebuffer::destroy(const VkAllocationCallbacks* pAllocator)
{
vk::deallocate(attachments, pAllocator);
}
void Framebuffer::clear(const RenderPass* renderPass, uint32_t clearValueCount, const VkClearValue* pClearValues, const VkRect2D& renderArea)
{
ASSERT(attachmentCount == renderPass->getAttachmentCount());
const uint32_t count = std::min(clearValueCount, attachmentCount);
for(uint32_t i = 0; i < count; i++)
{
const VkAttachmentDescription attachment = renderPass->getAttachment(i);
const Format format(attachment.format);
bool isDepth = format.isDepth();
bool isStencil = format.isStencil();
if(isDepth || isStencil)
{
bool clearDepth = (isDepth && (attachment.loadOp == VK_ATTACHMENT_LOAD_OP_CLEAR));
bool clearStencil = (isStencil && (attachment.stencilLoadOp == VK_ATTACHMENT_LOAD_OP_CLEAR));
if(clearDepth || clearStencil)
{
attachments[i]->clear(pClearValues[i],
(clearDepth ? VK_IMAGE_ASPECT_DEPTH_BIT : 0) |
(clearStencil ? VK_IMAGE_ASPECT_STENCIL_BIT : 0),
renderArea);
}
}
else if(attachment.loadOp == VK_ATTACHMENT_LOAD_OP_CLEAR)
{
attachments[i]->clear(pClearValues[i], VK_IMAGE_ASPECT_COLOR_BIT, renderArea);
}
}
}
void Framebuffer::clear(const RenderPass* renderPass, const VkClearAttachment& attachment, const VkClearRect& rect)
{
if(attachment.aspectMask == VK_IMAGE_ASPECT_COLOR_BIT)
{
if(attachment.colorAttachment != VK_ATTACHMENT_UNUSED)
{
VkSubpassDescription subpass = renderPass->getCurrentSubpass();
ASSERT(attachment.colorAttachment < subpass.colorAttachmentCount);
ASSERT(subpass.pColorAttachments[attachment.colorAttachment].attachment < attachmentCount);
attachments[subpass.pColorAttachments[attachment.colorAttachment].attachment]->clear(
attachment.clearValue, attachment.aspectMask, rect);
}
}
else if(attachment.aspectMask & (VK_IMAGE_ASPECT_DEPTH_BIT | VK_IMAGE_ASPECT_STENCIL_BIT))
{
VkSubpassDescription subpass = renderPass->getCurrentSubpass();
ASSERT(subpass.pDepthStencilAttachment->attachment < attachmentCount);
attachments[subpass.pDepthStencilAttachment->attachment]->clear(attachment.clearValue, attachment.aspectMask, rect);
}
}
ImageView *Framebuffer::getAttachment(uint32_t index) const
{
return attachments[index];
}
void Framebuffer::resolve(const RenderPass* renderPass)
{
VkSubpassDescription subpass = renderPass->getCurrentSubpass();
if(subpass.pResolveAttachments)
{
for(uint32_t i = 0; i < subpass.colorAttachmentCount; i++)
{
uint32_t resolveAttachment = subpass.pResolveAttachments[i].attachment;
if(resolveAttachment != VK_ATTACHMENT_UNUSED)
{
attachments[subpass.pColorAttachments[i].attachment]->resolve(attachments[resolveAttachment]);
}
}
}
}
size_t Framebuffer::ComputeRequiredAllocationSize(const VkFramebufferCreateInfo* pCreateInfo)
{
return pCreateInfo->attachmentCount * sizeof(void*);
}
} // namespace vk