The Tor Browser: gfx/skia/trunk/src/core/SkSpriteBlitter

gfx/skia/trunk/src/core/SkSpriteBlitter_ARGB32.cpp@6474c204b198 (annotated)

gfx/skia/trunk/src/core/SkSpriteBlitter_ARGB32.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SkSpriteBlitter.h"
 #include "SkBlitRow.h"
 #include "SkColorFilter.h"
 #include "SkColorPriv.h"
 #include "SkTemplates.h"
 #include "SkUtils.h"
 #include "SkXfermode.h"
 ///////////////////////////////////////////////////////////////////////////////
 class Sprite_D32_S32 : public SkSpriteBlitter {
 public:
     Sprite_D32_S32(const SkBitmap& src, U8CPU alpha)  : INHERITED(src) {
         SkASSERT(src.colorType() == kPMColor_SkColorType);
         unsigned flags32 = 0;
         if (255 != alpha) {
             flags32 |= SkBlitRow::kGlobalAlpha_Flag32;
         }
         if (!src.isOpaque()) {
             flags32 |= SkBlitRow::kSrcPixelAlpha_Flag32;
         }
         fProc32 = SkBlitRow::Factory32(flags32);
         fAlpha = alpha;
     }
     virtual void blitRect(int x, int y, int width, int height) {
         SkASSERT(width > 0 && height > 0);
         uint32_t* SK_RESTRICT dst = fDevice->getAddr32(x, y);
         const uint32_t* SK_RESTRICT src = fSource->getAddr32(x - fLeft,
                                                              y - fTop);
         size_t dstRB = fDevice->rowBytes();
         size_t srcRB = fSource->rowBytes();
         SkBlitRow::Proc32 proc = fProc32;
         U8CPU             alpha = fAlpha;
         do {
             proc(dst, src, width, alpha);
             dst = (uint32_t* SK_RESTRICT)((char*)dst + dstRB);
             src = (const uint32_t* SK_RESTRICT)((const char*)src + srcRB);
         } while (--height != 0);
     }
 private:
     SkBlitRow::Proc32   fProc32;
     U8CPU               fAlpha;
     typedef SkSpriteBlitter INHERITED;
 };
 ///////////////////////////////////////////////////////////////////////////////
 class Sprite_D32_XferFilter : public SkSpriteBlitter {
 public:
     Sprite_D32_XferFilter(const SkBitmap& source, const SkPaint& paint)
         : SkSpriteBlitter(source) {
         fColorFilter = paint.getColorFilter();
         SkSafeRef(fColorFilter);
         fXfermode = paint.getXfermode();
         SkSafeRef(fXfermode);
         fBufferSize = 0;
         fBuffer = NULL;
         unsigned flags32 = 0;
         if (255 != paint.getAlpha()) {
             flags32 |= SkBlitRow::kGlobalAlpha_Flag32;
         }
         if (!source.isOpaque()) {
             flags32 |= SkBlitRow::kSrcPixelAlpha_Flag32;
         }
         fProc32 = SkBlitRow::Factory32(flags32);
         fAlpha = paint.getAlpha();
     }
     virtual ~Sprite_D32_XferFilter() {
         delete[] fBuffer;
         SkSafeUnref(fXfermode);
         SkSafeUnref(fColorFilter);
     }
     virtual void setup(const SkBitmap& device, int left, int top,
                        const SkPaint& paint) {
         this->INHERITED::setup(device, left, top, paint);
         int width = device.width();
         if (width > fBufferSize) {
             fBufferSize = width;
             delete[] fBuffer;
             fBuffer = new SkPMColor[width];
         }
     }
 protected:
     SkColorFilter*      fColorFilter;
     SkXfermode*         fXfermode;
     int                 fBufferSize;
     SkPMColor*          fBuffer;
     SkBlitRow::Proc32   fProc32;
     U8CPU               fAlpha;
 private:
     typedef SkSpriteBlitter INHERITED;
 };
 ///////////////////////////////////////////////////////////////////////////////
 class Sprite_D32_S32A_XferFilter : public Sprite_D32_XferFilter {
 public:
     Sprite_D32_S32A_XferFilter(const SkBitmap& source, const SkPaint& paint)
         : Sprite_D32_XferFilter(source, paint) {}
     virtual void blitRect(int x, int y, int width, int height) {
         SkASSERT(width > 0 && height > 0);
         uint32_t* SK_RESTRICT dst = fDevice->getAddr32(x, y);
         const uint32_t* SK_RESTRICT src = fSource->getAddr32(x - fLeft,
                                                              y - fTop);
         size_t dstRB = fDevice->rowBytes();
         size_t srcRB = fSource->rowBytes();
         SkColorFilter* colorFilter = fColorFilter;
         SkXfermode* xfermode = fXfermode;
         do {
             const SkPMColor* tmp = src;
             if (NULL != colorFilter) {
                 colorFilter->filterSpan(src, width, fBuffer);
                 tmp = fBuffer;
             }
             if (NULL != xfermode) {
                 xfermode->xfer32(dst, tmp, width, NULL);
             } else {
                 fProc32(dst, tmp, width, fAlpha);
             }
             dst = (uint32_t* SK_RESTRICT)((char*)dst + dstRB);
             src = (const uint32_t* SK_RESTRICT)((const char*)src + srcRB);
         } while (--height != 0);
     }
 private:
     typedef Sprite_D32_XferFilter INHERITED;
 };
 static void fillbuffer(SkPMColor* SK_RESTRICT dst,
                        const SkPMColor16* SK_RESTRICT src, int count) {
     SkASSERT(count > 0);
     do {
         *dst++ = SkPixel4444ToPixel32(*src++);
     } while (--count != 0);
 }
 class Sprite_D32_S4444_XferFilter : public Sprite_D32_XferFilter {
 public:
     Sprite_D32_S4444_XferFilter(const SkBitmap& source, const SkPaint& paint)
         : Sprite_D32_XferFilter(source, paint) {}
     virtual void blitRect(int x, int y, int width, int height) {
         SkASSERT(width > 0 && height > 0);
         SkPMColor* SK_RESTRICT dst = fDevice->getAddr32(x, y);
         const SkPMColor16* SK_RESTRICT src = fSource->getAddr16(x - fLeft,
                                                                 y - fTop);
         size_t dstRB = fDevice->rowBytes();
         size_t srcRB = fSource->rowBytes();
         SkPMColor* SK_RESTRICT buffer = fBuffer;
         SkColorFilter* colorFilter = fColorFilter;
         SkXfermode* xfermode = fXfermode;
         do {
             fillbuffer(buffer, src, width);
             if (NULL != colorFilter) {
                 colorFilter->filterSpan(buffer, width, buffer);
             }
             if (NULL != xfermode) {
                 xfermode->xfer32(dst, buffer, width, NULL);
             } else {
                 fProc32(dst, buffer, width, fAlpha);
             }
             dst = (SkPMColor* SK_RESTRICT)((char*)dst + dstRB);
             src = (const SkPMColor16* SK_RESTRICT)((const char*)src + srcRB);
         } while (--height != 0);
     }
 private:
     typedef Sprite_D32_XferFilter INHERITED;
 };
 ///////////////////////////////////////////////////////////////////////////////
 static void src_row(SkPMColor* SK_RESTRICT dst,
                     const SkPMColor16* SK_RESTRICT src, int count) {
     do {
         *dst = SkPixel4444ToPixel32(*src);
         src += 1;
         dst += 1;
     } while (--count != 0);
 }
 class Sprite_D32_S4444_Opaque : public SkSpriteBlitter {
 public:
     Sprite_D32_S4444_Opaque(const SkBitmap& source) : SkSpriteBlitter(source) {}
     virtual void blitRect(int x, int y, int width, int height) {
         SkASSERT(width > 0 && height > 0);
         SkPMColor* SK_RESTRICT dst = fDevice->getAddr32(x, y);
         const SkPMColor16* SK_RESTRICT src = fSource->getAddr16(x - fLeft,
                                                                 y - fTop);
         size_t dstRB = fDevice->rowBytes();
         size_t srcRB = fSource->rowBytes();
         do {
             src_row(dst, src, width);
             dst = (SkPMColor* SK_RESTRICT)((char*)dst + dstRB);
             src = (const SkPMColor16* SK_RESTRICT)((const char*)src + srcRB);
         } while (--height != 0);
     }
 };
 static void srcover_row(SkPMColor* SK_RESTRICT dst,
                         const SkPMColor16* SK_RESTRICT src, int count) {
     do {
         *dst = SkPMSrcOver(SkPixel4444ToPixel32(*src), *dst);
         src += 1;
         dst += 1;
     } while (--count != 0);
 }
 class Sprite_D32_S4444 : public SkSpriteBlitter {
 public:
     Sprite_D32_S4444(const SkBitmap& source) : SkSpriteBlitter(source) {}
     virtual void blitRect(int x, int y, int width, int height) {
         SkASSERT(width > 0 && height > 0);
         SkPMColor* SK_RESTRICT dst = fDevice->getAddr32(x, y);
         const SkPMColor16* SK_RESTRICT src = fSource->getAddr16(x - fLeft,
                                                                 y - fTop);
         size_t dstRB = fDevice->rowBytes();
         size_t srcRB = fSource->rowBytes();
         do {
             srcover_row(dst, src, width);
             dst = (SkPMColor* SK_RESTRICT)((char*)dst + dstRB);
             src = (const SkPMColor16* SK_RESTRICT)((const char*)src + srcRB);
         } while (--height != 0);
     }
 };
 ///////////////////////////////////////////////////////////////////////////////
 SkSpriteBlitter* SkSpriteBlitter::ChooseD32(const SkBitmap& source, const SkPaint& paint,
         SkTBlitterAllocator* allocator) {
     SkASSERT(allocator != NULL);
     if (paint.getMaskFilter() != NULL) {
         return NULL;
     }
     U8CPU       alpha = paint.getAlpha();
     SkXfermode* xfermode = paint.getXfermode();
     SkColorFilter* filter = paint.getColorFilter();
     SkSpriteBlitter* blitter = NULL;
     switch (source.colorType()) {
         case kARGB_4444_SkColorType:
             if (alpha != 0xFF) {
                 return NULL;    // we only have opaque sprites
             }
             if (xfermode || filter) {
                 blitter = allocator->createT<Sprite_D32_S4444_XferFilter>(source, paint);
             } else if (source.isOpaque()) {
                 blitter = allocator->createT<Sprite_D32_S4444_Opaque>(source);
             } else {
                 blitter = allocator->createT<Sprite_D32_S4444>(source);
             }
             break;
         case kPMColor_SkColorType:
             if (xfermode || filter) {
                 if (255 == alpha) {
                     // this can handle xfermode or filter, but not alpha
                     blitter = allocator->createT<Sprite_D32_S32A_XferFilter>(source, paint);
                 }
             } else {
                 // this can handle alpha, but not xfermode or filter
                 blitter = allocator->createT<Sprite_D32_S32>(source, alpha);
             }
             break;
         default:
             break;
     }
     return blitter;
 }

The Tor Browser / annotate

gfx/skia/trunk/src/core/SkSpriteBlitter_ARGB32.cpp@6474c204b198 (annotated)

gfx/skia/trunk/src/core/SkSpriteBlitter_ARGB32.cpp