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//
// Copyright 2016 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// vk_format_utils:
// Helper for Vulkan format code.
#ifndef LIBANGLE_RENDERER_VULKAN_VK_FORMAT_UTILS_H_
#define LIBANGLE_RENDERER_VULKAN_VK_FORMAT_UTILS_H_
#include <vulkan/vulkan.h>
#include "libANGLE/formatutils.h"
#include "libANGLE/renderer/Format.h"
#include "libANGLE/renderer/copyvertex.h"
#include "libANGLE/renderer/renderer_utils.h"
#include "platform/FeaturesVk.h"
#include <array>
namespace gl
{
struct SwizzleState;
class TextureCapsMap;
} // namespace gl
namespace rx
{
class RendererVk;
namespace vk
{
// VkFormat values in range [0, kNumVkFormats) are used as indices in various tables.
constexpr uint32_t kNumVkFormats = 185;
struct ImageFormatInitInfo final
{
angle::FormatID format;
VkFormat vkFormat;
InitializeTextureDataFunction initializer;
};
struct BufferFormatInitInfo final
{
angle::FormatID format;
VkFormat vkFormat;
bool vkFormatIsPacked;
VertexCopyFunction vertexLoadFunction;
bool vertexLoadRequiresConversion;
};
struct Format final : private angle::NonCopyable
{
Format();
bool valid() const { return internalFormat != 0; }
// The ANGLE format is the front-end format.
const angle::Format &angleFormat() const { return angle::Format::Get(angleFormatID); }
// The Image format is the VkFormat used to implement the front-end format for VkImages.
const angle::Format &imageFormat() const { return angle::Format::Get(imageFormatID); }
// The Buffer format is the VkFormat used to implement the front-end format for VkBuffers.
const angle::Format &bufferFormat() const { return angle::Format::Get(bufferFormatID); }
// Returns OpenGL format information for the front-end format.
const gl::InternalFormat &getInternalFormatInfo(GLenum type) const
{
return gl::GetInternalFormatInfo(internalFormat, type);
}
// Get buffer alignment for image-copy operations (to or from a buffer).
size_t getImageCopyBufferAlignment() const;
// Returns true if the Image format has more channels than the ANGLE format.
bool hasEmulatedImageChannels() const;
// This is an auto-generated method in vk_format_table_autogen.cpp.
void initialize(RendererVk *renderer, const angle::Format &angleFormat);
// These are used in the format table init.
void initImageFallback(RendererVk *renderer, const ImageFormatInitInfo *info, int numInfo);
void initBufferFallback(RendererVk *renderer, const BufferFormatInitInfo *info, int numInfo);
angle::FormatID angleFormatID;
GLenum internalFormat;
angle::FormatID imageFormatID;
VkFormat vkImageFormat;
angle::FormatID bufferFormatID;
VkFormat vkBufferFormat;
InitializeTextureDataFunction imageInitializerFunction;
LoadFunctionMap textureLoadFunctions;
VertexCopyFunction vertexLoadFunction;
bool vertexLoadRequiresConversion;
bool vkBufferFormatIsPacked;
bool vkSupportsStorageBuffer;
bool vkFormatIsInt;
bool vkFormatIsUnsigned;
};
bool operator==(const Format &lhs, const Format &rhs);
bool operator!=(const Format &lhs, const Format &rhs);
class FormatTable final : angle::NonCopyable
{
public:
FormatTable();
~FormatTable();
// Also initializes the TextureCapsMap and the compressedTextureCaps in the Caps instance.
void initialize(RendererVk *renderer,
gl::TextureCapsMap *outTextureCapsMap,
std::vector<GLenum> *outCompressedTextureFormats);
ANGLE_INLINE const Format &operator[](GLenum internalFormat) const
{
angle::FormatID formatID = angle::Format::InternalFormatToID(internalFormat);
return mFormatData[static_cast<size_t>(formatID)];
}
ANGLE_INLINE const Format &operator[](angle::FormatID formatID) const
{
return mFormatData[static_cast<size_t>(formatID)];
}
private:
// The table data is indexed by angle::FormatID.
std::array<Format, angle::kNumANGLEFormats> mFormatData;
};
// This will return a reference to a VkFormatProperties with the feature flags supported
// if the format is a mandatory format described in section 31.3.3. Required Format Support
// of the Vulkan spec. If the vkFormat isn't mandatory, it will return a VkFormatProperties
// initialized to 0.
const VkFormatProperties &GetMandatoryFormatSupport(VkFormat vkFormat);
} // namespace vk
// Checks if a vkFormat supports all the features needed to use it as a GL texture format
bool HasFullTextureFormatSupport(RendererVk *renderer, VkFormat vkFormat);
// Returns the alignment for a buffer to be used with the vertex input stage in Vulkan. This
// calculation is listed in the Vulkan spec at the end of the section 'Vertex Input Description'.
size_t GetVertexInputAlignment(const vk::Format &format);
void MapSwizzleState(const vk::Format &format,
const gl::SwizzleState &swizzleState,
gl::SwizzleState *swizzleStateOut);
} // namespace rx
#endif // LIBANGLE_RENDERER_VULKAN_VK_FORMAT_UTILS_H_