在过去的几周里，我一直在与 Vulkan 合作，我遇到了一个只发生在 AMD 卡上的问题。特别是 AMD 7970M。我在 GTX 700 和 900 系列卡上运行我的项目没有问题。我什至在 Windows 上运行了带有 Nvidia 卡的 Linux（Steam OS），没有任何问题。这个问题只出现在 AMD 卡上，而且只出现在我的项目中；Sascha Willems的所有示例和项目都没有问题。
现在我正在绘制一个有纹理的 Raptor 模型并将其旋转到位。我将其渲染为纹理，然后将该纹理应用于全屏三角形；基本的离屏渲染。但是，我的 7970M 上的深度似乎无法正确清除。相反，我得到了这个奇怪的伪影，比如深度没有被正确清除：
当然，我尝试使用 RenderDoc 进行深入研究，但深度完全错误。猛禽和它所绘制的全屏三角形都是一团糟：
我尝试将我的代码与 Sascha Willems 的 Offscreen 示例进行比较，我似乎确实以相同的方式做几乎所有事情。我认为我创建深度的方式可能有问题，但与我见过的所有示例相比，它似乎还不错。
以下是我在哪里创建深度图像和视图的一些调试视图：
这是整个方法：
bool VKRenderTarget::setupFramebuffer(VKRenderer* renderer)
{
VkDevice device = renderer->GetVKDevice();
VkCommandBuffer setupCommand;
m_colorFormat = renderer->GetPreferredImageFormat();
m_depthFormat = renderer->GetPreferredDepthFormat();
renderer->CreateSetupCommandBuffer();
setupCommand = renderer->GetSetupCommandBuffer();
VkResult err;
//Color attachment
VkImageCreateInfo imageInfo = {};
imageInfo.sType = VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO;
imageInfo.pNext = nullptr;
imageInfo.format = m_colorFormat;
imageInfo.imageType = VK_IMAGE_TYPE_2D;
imageInfo.extent.width = m_width;
imageInfo.extent.height = m_height;
imageInfo.mipLevels = 1;
imageInfo.arrayLayers = 1;
imageInfo.samples = VK_SAMPLE_COUNT_1_BIT;
imageInfo.tiling = VK_IMAGE_TILING_OPTIMAL;
imageInfo.usage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT | VK_IMAGE_USAGE_TRANSFER_SRC_BIT;
imageInfo.flags = 0;
VkMemoryAllocateInfo memAllocInfo = {};
memAllocInfo.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO;
VkMemoryRequirements memReqs;
err = vkCreateImage(device, &imageInfo, nullptr, &m_color.image);
assert(!err);
if (err != VK_SUCCESS)
{
#ifdef _DEBUG
Core::DebugPrintF("VKRenderTarget::VPrepare(): Error creating color image!\n");
#endif
return false;
}
vkGetImageMemoryRequirements(device, m_color.image, &memReqs);
memAllocInfo.allocationSize = memReqs.size;
renderer->MemoryTypeFromProperties(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT, &memAllocInfo.memoryTypeIndex);
err = vkAllocateMemory(device, &memAllocInfo, nullptr, &m_color.memory);
assert(!err);
if (err != VK_SUCCESS)
{
#ifdef _DEBUG
Core::DebugPrintF("VKRenderTarget::VPrepare(): Error allocating color image memory!\n");
#endif
return false;
}
err = vkBindImageMemory(device, m_color.image, m_color.memory, 0);
if (err != VK_SUCCESS)
{
#ifdef _DEBUG
Core::DebugPrintF("VKRenderTarget::VPrepare(): Error binding color image memory!\n");
#endif
return false;
}
renderer->SetImageLayout(setupCommand, m_color.image, VK_IMAGE_ASPECT_COLOR_BIT,
VK_IMAGE_LAYOUT_UNDEFINED, VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL);
VkImageViewCreateInfo viewInfo = {};
viewInfo.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
viewInfo.pNext = nullptr;
viewInfo.viewType = VK_IMAGE_VIEW_TYPE_2D;
viewInfo.format = m_colorFormat;
viewInfo.flags = 0;
viewInfo.subresourceRange = {};
viewInfo.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
viewInfo.subresourceRange.baseMipLevel = 0;
viewInfo.subresourceRange.levelCount = 1;
viewInfo.subresourceRange.baseArrayLayer = 0;
viewInfo.subresourceRange.layerCount = 1;
viewInfo.image = m_color.image;
err = vkCreateImageView(device, &viewInfo, nullptr, &m_color.view);
if (err != VK_SUCCESS)
{
#ifdef _DEBUG
Core::DebugPrintF("VKRenderTarget::VPrepare(): Error creating color image view!\n");
#endif
return false;
}
//We can reuse the same info structs to build the depth image
imageInfo.format = m_depthFormat;
imageInfo.usage = VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT;
err = vkCreateImage(device, &imageInfo, nullptr, &(m_depth.image));
assert(!err);
if (err != VK_SUCCESS)
{
#ifdef _DEBUG
Core::DebugPrintF("VKRenderTarget::VPrepare(): Error creating depth image!\n");
#endif
return false;
}
viewInfo.format = m_depthFormat;
viewInfo.subresourceRange.aspectMask = VK_IMAGE_ASPECT_DEPTH_BIT | VK_IMAGE_ASPECT_STENCIL_BIT;
vkGetImageMemoryRequirements(device, m_depth.image, &memReqs);
memAllocInfo.allocationSize = memReqs.size;
renderer->MemoryTypeFromProperties(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT, &memAllocInfo.memoryTypeIndex);
err = vkAllocateMemory(device, &memAllocInfo, nullptr, &m_depth.memory);
assert(!err);
if (err != VK_SUCCESS)
{
#ifdef _DEBUG
Core::DebugPrintF("VKRenderTarget::VPrepare(): Error allocating depth image memory!\n");
#endif
return false;
}
err = vkBindImageMemory(device, m_depth.image, m_depth.memory, 0);
if (err != VK_SUCCESS)
{
#ifdef _DEBUG
Core::DebugPrintF("VKRenderTarget::VPrepare(): Error binding depth image memory!\n");
#endif
return false;
}
renderer->SetImageLayout(setupCommand, m_depth.image,
VK_IMAGE_ASPECT_DEPTH_BIT | VK_IMAGE_ASPECT_STENCIL_BIT,
VK_IMAGE_LAYOUT_UNDEFINED,
VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL);
viewInfo.image = m_depth.image;
err = vkCreateImageView(device, &viewInfo, nullptr, &m_depth.view);
if (err != VK_SUCCESS)
{
#ifdef _DEBUG
Core::DebugPrintF("VKRenderTarget::VPrepare(): Error creating depth image view!\n");
#endif
return false;
}
renderer->FlushSetupCommandBuffer();
//Finally create internal framebuffer
VkImageView attachments[2];
attachments[0] = m_color.view;
attachments[1] = m_depth.view;
VkFramebufferCreateInfo framebufferInfo = {};
framebufferInfo.sType = VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO;
framebufferInfo.pNext = nullptr;
framebufferInfo.flags = 0;
framebufferInfo.renderPass = *((VKRenderPass*)m_renderPass)->GetVkRenderPass();
framebufferInfo.attachmentCount = 2;
framebufferInfo.pAttachments = attachments;
framebufferInfo.width = m_width;
framebufferInfo.height = m_height;
framebufferInfo.layers = 1;
err = vkCreateFramebuffer(device, &framebufferInfo, nullptr, &m_framebuffer);
if (err != VK_SUCCESS)
{
#ifdef _DEBUG
Core::DebugPrintF("VKRenderTarget::VPrepare(): Error creating framebuffer!\n");
#endif
return false;
}
return true;
}
如果有人想了解有关代码的更多信息，请随时询问，我会提供。这个项目有很多代码行，所以我不希望每个人都必须费力地完成所有工作。如果您愿意，可以在http://github.com/thirddegree/HatchitGraphics/tree/dev找到所有代码
编辑：经过更多的探索，我发现即使颜色也不是很清楚。RenderDoc 显示每个帧只渲染猛禽的切口，并不会清除帧的其余部分。这是驱动问题吗？
编辑：更多信息。我发现如果我什么都不画，只是开始和结束一个渲染通道，甚至不画我的全屏三角形，屏幕就会清除。但是，如果我只绘制三角形，深度是错误的（即使我没有从屏幕外粘贴任何东西或应用任何类型的纹理）。
编辑：更具体地说，颜色会清晰，但深度不会。如果我不画任何东西，深度将保持黑色；全为 0。为什么全屏三角形会导致奇怪的深度静态我不确定。
