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// Copyright 2016 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.
#ifndef sw_Blitter_hpp
#define sw_Blitter_hpp
#include "Memset.hpp"
#include "RoutineCache.hpp"
#include "Reactor/Reactor.hpp"
#include "Vulkan/VkFormat.h"
#include <mutex>
#include <cstring>
namespace vk {
class Image;
class Buffer;
} // namespace vk
namespace sw {
class Blitter
{
struct Options
{
explicit Options() = default;
explicit Options(bool filter, bool allowSRGBConversion)
: writeMask(0xF), clearOperation(false), filter(filter), allowSRGBConversion(allowSRGBConversion), clampToEdge(false) {}
explicit Options(unsigned int writeMask)
: writeMask(writeMask), clearOperation(true), filter(false), allowSRGBConversion(true), clampToEdge(false) {}
union
{
struct
{
bool writeRed : 1;
bool writeGreen : 1;
bool writeBlue : 1;
bool writeAlpha : 1;
};
unsigned char writeMask;
};
bool clearOperation : 1;
bool filter : 1;
bool allowSRGBConversion : 1;
bool clampToEdge : 1;
};
struct State : Memset<State>, Options
{
State() : Memset(this, 0) {}
State(const Options &options) : Memset(this, 0), Options(options) {}
State(vk::Format sourceFormat, vk::Format destFormat, int srcSamples, int destSamples, const Options &options) :
Memset(this, 0), Options(options), sourceFormat(sourceFormat), destFormat(destFormat), srcSamples(srcSamples), destSamples(destSamples) {}
bool operator==(const State &state) const
{
static_assert(is_memcmparable<State>::value, "Cannot memcmp State");
return memcmp(this, &state, sizeof(State)) == 0;
}
vk::Format sourceFormat;
vk::Format destFormat;
int srcSamples = 0;
int destSamples = 0;
};
struct BlitData
{
void *source;
void *dest;
int sPitchB;
int dPitchB;
int sSliceB;
int dSliceB;
float x0;
float y0;
float w;
float h;
int y0d;
int y1d;
int x0d;
int x1d;
int sWidth;
int sHeight;
};
struct CubeBorderData
{
void *layers;
int pitchB;
uint32_t layerSize;
uint32_t dim;
};
public:
Blitter();
virtual ~Blitter();
void clear(void *pixel, vk::Format format, vk::Image *dest, const vk::Format& viewFormat, const VkImageSubresourceRange& subresourceRange, const VkRect2D* renderArea = nullptr);
void blit(const vk::Image *src, vk::Image *dst, VkImageBlit region, VkFilter filter);
void blitToBuffer(const vk::Image *src, VkImageSubresourceLayers subresource, VkOffset3D offset, VkExtent3D extent, uint8_t *dst, int bufferRowPitch, int bufferSlicePitch);
void blitFromBuffer(const vk::Image *dst, VkImageSubresourceLayers subresource, VkOffset3D offset, VkExtent3D extent, uint8_t *src, int bufferRowPitch, int bufferSlicePitch);
void updateBorders(vk::Image* image, const VkImageSubresourceLayers& subresourceLayers);
private:
enum Edge { TOP, BOTTOM, RIGHT, LEFT };
bool fastClear(void *pixel, vk::Format format, vk::Image *dest, const vk::Format& viewFormat, const VkImageSubresourceRange& subresourceRange, const VkRect2D* renderArea);
Float4 readFloat4(Pointer<Byte> element, const State &state);
void write(Float4 &color, Pointer<Byte> element, const State &state);
Int4 readInt4(Pointer<Byte> element, const State &state);
void write(Int4 &color, Pointer<Byte> element, const State &state);
static void ApplyScaleAndClamp(Float4 &value, const State &state, bool preScaled = false);
static Int ComputeOffset(Int &x, Int &y, Int &pitchB, int bytes);
static Float4 LinearToSRGB(Float4 &color);
static Float4 sRGBtoLinear(Float4 &color);
using BlitFunction = FunctionT<void(const BlitData*)>;
using BlitRoutineType = BlitFunction::RoutineType;
BlitRoutineType getBlitRoutine(const State &state);
BlitRoutineType generate(const State &state);
using CornerUpdateFunction = FunctionT<void(const CubeBorderData*)>;
using CornerUpdateRoutineType = CornerUpdateFunction::RoutineType;
CornerUpdateRoutineType getCornerUpdateRoutine(const State &state);
CornerUpdateRoutineType generateCornerUpdate(const State& state);
void computeCubeCorner(Pointer<Byte>& layer, Int& x0, Int& x1, Int& y0, Int& y1, Int& pitchB, const State& state);
void copyCubeEdge(vk::Image* image,
const VkImageSubresourceLayers& dstSubresourceLayers, Edge dstEdge,
const VkImageSubresourceLayers& srcSubresourceLayers, Edge srcEdge);
std::mutex blitMutex;
RoutineCacheT<State, BlitFunction::CFunctionType> blitCache; // guarded by blitMutex
std::mutex cornerUpdateMutex;
RoutineCacheT<State, CornerUpdateFunction::CFunctionType> cornerUpdateCache; // guarded by cornerUpdateMutex
};
} // namespace sw
#endif // sw_Blitter_hpp