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Use R5G6B5 as Vulkan swapchain format rather than B5G6R5

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B5G6R5 isn't generally supported by the swapchain and the format is used for R5G6B5 with swapped R/B channels to avoid aliasing so we reverse that by using R5G6B5 as the underlying Vulkan format for the swapchain which should be automatically handled by the driver for any copies from B5G6R5 textures and the data representation should be the same as B5G6R5 with swapped R/B channels so not reporting the correct texture::Format should be fine.
This commit is contained in:
PixelyIon 2022-04-10 11:53:27 +05:30
parent e54f86e923
commit 62ba180550
1 changed files with 8 additions and 3 deletions
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11
app/src/main/cpp/skyline/gpu/presentation_engine.cpp
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@ -120,10 +120,15 @@ namespace skyline::gpu {
else if (capabilities.minImageExtent.height > extent.height || capabilities.minImageExtent.width > extent.width || capabilities.maxImageExtent.height < extent.height || capabilities.maxImageExtent.width < extent.width)
throw exception("Cannot update swapchain to accomodate image extent: {}x{} ({}x{}-{}x{})", extent.width, extent.height, capabilities.minImageExtent.width, capabilities.minImageExtent.height, capabilities.maxImageExtent.width, capabilities.maxImageExtent.height);
vk::Format vkFormat{*format};
if (vkFormat == vk::Format::eB5G6R5UnormPack16 && format->swapRedBlue)
// B5G6R5 isn't generally supported by the swapchain and the format is used for R5G6B5 with swapped R/B channels to avoid aliasing so we reverse that by using R5G6B5 as the underlying Vulkan format for the swapchain which should be automatically handled by the driver for any copies from B5G6R5 textures and the data representation should be the same as B5G6R5 with swapped R/B channels so not reporting the correct texture::Format should be fine
vkFormat = vk::Format::eR5G6B5UnormPack16;
if (swapchainFormat != format) {
auto formats{gpu.vkPhysicalDevice.getSurfaceFormatsKHR(**vkSurface)};
if (std::find(formats.begin(), formats.end(), vk::SurfaceFormatKHR{*format, vk::ColorSpaceKHR::eSrgbNonlinear}) == formats.end())
throw exception("Surface doesn't support requested image format '{}' with colorspace '{}'", vk::to_string(*format), vk::to_string(vk::ColorSpaceKHR::eSrgbNonlinear));
if (std::find(formats.begin(), formats.end(), vk::SurfaceFormatKHR{vkFormat, vk::ColorSpaceKHR::eSrgbNonlinear}) == formats.end())
Logger::Warn("Surface doesn't support requested image format '{}' with colorspace '{}'", vk::to_string(vkFormat), vk::to_string(vk::ColorSpaceKHR::eSrgbNonlinear));
}
constexpr vk::ImageUsageFlags presentUsage{vk::ImageUsageFlagBits::eColorAttachment | vk::ImageUsageFlagBits::eTransferSrc | vk::ImageUsageFlagBits::eTransferDst};
@ -138,7 +143,7 @@ namespace skyline::gpu {
vkSwapchain.emplace(gpu.vkDevice, vk::SwapchainCreateInfoKHR{
.surface = **vkSurface,
.minImageCount = minImageCount,
.imageFormat = *format,
.imageFormat = vkFormat,
.imageColorSpace = vk::ColorSpaceKHR::eSrgbNonlinear,
.imageExtent = extent,
.imageArrayLayers = 1,