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Blitter.hpp
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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 "Surface.hpp"
#include "RoutineCache.hpp"
#include "Reactor/Reactor.hpp"
#include <string.h>
namespace sw
{
class Blitter
{
struct Options
{
Options() = default;
Options(bool filter, bool useStencil, bool convertSRGB)
: writeMask(0xF), clearOperation(false), filter(filter), useStencil(useStencil), convertSRGB(convertSRGB), clampToEdge(false) {}
Options(unsigned int writeMask)
: writeMask(writeMask), clearOperation(true), filter(false), useStencil(false), convertSRGB(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 useStencil : 1;
bool convertSRGB : 1;
bool clampToEdge : 1;
};
struct State : Options
{
State() = default;
State(const Options &options) : Options(options) {}
bool operator==(const State &state) const
{
return memcmp(this, &state, sizeof(State)) == 0;
}
Format sourceFormat;
Format destFormat;
int destSamples;
};
struct BlitData
{
void *source;
void *dest;
int sPitchB;
int dPitchB;
int dSliceB;
float x0;
float y0;
float w;
float h;
int y0d;
int y1d;
int x0d;
int x1d;
int sWidth;
int sHeight;
};
public:
Blitter();
virtual ~Blitter();
void clear(void *pixel, sw::Format format, Surface *dest, const SliceRect &dRect, unsigned int rgbaMask);
void blit(Surface *source, const SliceRectF &sRect, Surface *dest, const SliceRect &dRect, const Options &options);
void blit3D(Surface *source, Surface *dest);
private:
bool fastClear(void *pixel, sw::Format format, Surface *dest, const SliceRect &dRect, unsigned int rgbaMask);
bool read(Float4 &color, Pointer<Byte> element, const State &state);
bool write(Float4 &color, Pointer<Byte> element, const State &state);
bool read(Int4 &color, Pointer<Byte> element, const State &state);
bool write(Int4 &color, Pointer<Byte> element, const State &state);
static bool GetScale(float4& scale, Format format);
static bool ApplyScaleAndClamp(Float4 &value, const State &state, bool preScaled = false);
static Int ComputeOffset(Int &x, Int &y, Int &pitchB, int bytes, bool quadLayout);
static Float4 LinearToSRGB(Float4 &color);
static Float4 sRGBtoLinear(Float4 &color);
bool blitReactor(Surface *source, const SliceRectF &sRect, Surface *dest, const SliceRect &dRect, const Options &options);
Routine *generate(const State &state);
RoutineCache<State> *blitCache;
MutexLock criticalSection;
};
}
#endif // sw_Blitter_hpp