src/Renderer/Blitter.hpp

   1 // Copyright 2016 The SwiftShader Authors. All Rights Reserved.
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //    http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14
  15 #ifndef sw_Blitter_hpp
  16 #define sw_Blitter_hpp
  17
  18 #include "Surface.hpp"
  19 #include "RoutineCache.hpp"
  20 #include "Reactor/Reactor.hpp"
  21
  22 #include <string.h>
  23
  24 namespace sw
  25 {
  26         class Blitter
  27         {
  28                 enum Options : unsigned char
  29                 {
  30                         FILTER_POINT = 0x00,
  31                         WRITE_RED = 0x01,
  32                         WRITE_GREEN = 0x02,
  33                         WRITE_BLUE = 0x04,
  34                         WRITE_ALPHA = 0x08,
  35                         WRITE_RGBA = WRITE_RED | WRITE_GREEN | WRITE_BLUE | WRITE_ALPHA,
  36                         FILTER_LINEAR = 0x10,
  37                         CLEAR_OPERATION = 0x20,
  38                         USE_STENCIL = 0x40,
  39                 };
  40
  41                 struct BlitState
  42                 {
  43                         bool operator==(const BlitState &state) const
  44                         {
  45                                 return memcmp(this, &state, sizeof(BlitState)) == 0;
  46                         }
  47
  48                         Format sourceFormat;
  49                         Format destFormat;
  50                         Blitter::Options options;
  51                 };
  52
  53                 struct BlitData
  54                 {
  55                         void *source;
  56                         void *dest;
  57                         int sPitchB;
  58                         int dPitchB;
  59
  60                         float x0;
  61                         float y0;
  62                         float w;
  63                         float h;
  64
  65                         int y0d;
  66                         int y1d;
  67                         int x0d;
  68                         int x1d;
  69
  70                         int sWidth;
  71                         int sHeight;
  72                 };
  73
  74         public:
  75                 Blitter();
  76                 virtual ~Blitter();
  77
  78                 void clear(void* pixel, sw::Format format, Surface *dest, const SliceRect &dRect, unsigned int rgbaMask);
  79                 void blit(Surface *source, const SliceRect &sRect, Surface *dest, const SliceRect &dRect, bool filter, bool isStencil = false);
  80                 void blit3D(Surface *source, Surface *dest);
  81
  82         private:
  83                 bool fastClear(void* pixel, sw::Format format, Surface *dest, const SliceRect &dRect, unsigned int rgbaMask);
  84
  85                 bool read(Float4 &color, Pointer<Byte> element, Format format);
  86                 bool write(Float4 &color, Pointer<Byte> element, Format format, const Blitter::Options& options);
  87                 bool read(Int4 &color, Pointer<Byte> element, Format format);
  88                 bool write(Int4 &color, Pointer<Byte> element, Format format, const Blitter::Options& options);
  89                 static bool GetScale(float4& scale, Format format);
  90                 static bool ApplyScaleAndClamp(Float4& value, const BlitState& state);
  91                 static Int ComputeOffset(Int& x, Int& y, Int& pitchB, int bytes, bool quadLayout);
  92                 void blit(Surface *source, const SliceRect &sRect, Surface *dest, const SliceRect &dRect, const Blitter::Options& options);
  93                 bool blitReactor(Surface *source, const SliceRect &sRect, Surface *dest, const SliceRect &dRect, const Blitter::Options& options);
  94                 Routine *generate(BlitState &state);
  95
  96                 RoutineCache<BlitState> *blitCache;
  97                 MutexLock criticalSection;
  98         };
  99 }
 100
 101 #endif   // sw_Blitter_hpp