The Tor Browser: gfx/skia/trunk/src/core/SkBlitter_ARGB32.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/core/SkBlitter_ARGB32.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/core/SkBlitter_ARGB32.cpp

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 /*
  * 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 "SkCoreBlitters.h"
 #include "SkColorPriv.h"
 #include "SkShader.h"
 #include "SkUtils.h"
 #include "SkXfermode.h"
 #include "SkBlitMask.h"
 ///////////////////////////////////////////////////////////////////////////////
 static void SkARGB32_Blit32(const SkBitmap& device, const SkMask& mask,
                             const SkIRect& clip, SkPMColor srcColor) {
     U8CPU alpha = SkGetPackedA32(srcColor);
     unsigned flags = SkBlitRow::kSrcPixelAlpha_Flag32;
     if (alpha != 255) {
         flags |= SkBlitRow::kGlobalAlpha_Flag32;
     }
     SkBlitRow::Proc32 proc = SkBlitRow::Factory32(flags);
     int x = clip.fLeft;
     int y = clip.fTop;
     int width = clip.width();
     int height = clip.height();
     SkPMColor*         dstRow = device.getAddr32(x, y);
     const SkPMColor* srcRow = reinterpret_cast<const SkPMColor*>(mask.getAddr8(x, y));
     do {
         proc(dstRow, srcRow, width, alpha);
         dstRow = (SkPMColor*)((char*)dstRow + device.rowBytes());
         srcRow = (const SkPMColor*)((const char*)srcRow + mask.fRowBytes);
     } while (--height != 0);
 }
 //////////////////////////////////////////////////////////////////////////////////////
 SkARGB32_Blitter::SkARGB32_Blitter(const SkBitmap& device, const SkPaint& paint)
         : INHERITED(device) {
     SkColor color = paint.getColor();
     fColor = color;
     fSrcA = SkColorGetA(color);
     unsigned scale = SkAlpha255To256(fSrcA);
     fSrcR = SkAlphaMul(SkColorGetR(color), scale);
     fSrcG = SkAlphaMul(SkColorGetG(color), scale);
     fSrcB = SkAlphaMul(SkColorGetB(color), scale);
     fPMColor = SkPackARGB32(fSrcA, fSrcR, fSrcG, fSrcB);
     fColor32Proc = SkBlitRow::ColorProcFactory();
     fColorRect32Proc = SkBlitRow::ColorRectProcFactory();
 }
 const SkBitmap* SkARGB32_Blitter::justAnOpaqueColor(uint32_t* value) {
     if (255 == fSrcA) {
         *value = fPMColor;
         return &fDevice;
     }
     return NULL;
 }
 #if defined _WIN32 && _MSC_VER >= 1300  // disable warning : local variable used without having been initialized
 #pragma warning ( push )
 #pragma warning ( disable : 4701 )
 #endif
 void SkARGB32_Blitter::blitH(int x, int y, int width) {
     SkASSERT(x >= 0 && y >= 0 && x + width <= fDevice.width());
     uint32_t*   device = fDevice.getAddr32(x, y);
     fColor32Proc(device, device, width, fPMColor);
 }
 void SkARGB32_Blitter::blitAntiH(int x, int y, const SkAlpha antialias[],
                                  const int16_t runs[]) {
     if (fSrcA == 0) {
         return;
     }
     uint32_t    color = fPMColor;
     uint32_t*   device = fDevice.getAddr32(x, y);
     unsigned    opaqueMask = fSrcA; // if fSrcA is 0xFF, then we will catch the fast opaque case
     for (;;) {
         int count = runs[0];
         SkASSERT(count >= 0);
         if (count <= 0) {
             return;
         }
         unsigned aa = antialias[0];
         if (aa) {
             if ((opaqueMask & aa) == 255) {
                 sk_memset32(device, color, count);
             } else {
                 uint32_t sc = SkAlphaMulQ(color, SkAlpha255To256(aa));
                 fColor32Proc(device, device, count, sc);
             }
         }
         runs += count;
         antialias += count;
         device += count;
     }
 }
 //////////////////////////////////////////////////////////////////////////////////////
 #define solid_8_pixels(mask, dst, color)    \
     do {                                    \
         if (mask & 0x80) dst[0] = color;    \
         if (mask & 0x40) dst[1] = color;    \
         if (mask & 0x20) dst[2] = color;    \
         if (mask & 0x10) dst[3] = color;    \
         if (mask & 0x08) dst[4] = color;    \
         if (mask & 0x04) dst[5] = color;    \
         if (mask & 0x02) dst[6] = color;    \
         if (mask & 0x01) dst[7] = color;    \
     } while (0)
 #define SK_BLITBWMASK_NAME                  SkARGB32_BlitBW
 #define SK_BLITBWMASK_ARGS                  , SkPMColor color
 #define SK_BLITBWMASK_BLIT8(mask, dst)      solid_8_pixels(mask, dst, color)
 #define SK_BLITBWMASK_GETADDR               getAddr32
 #define SK_BLITBWMASK_DEVTYPE               uint32_t
 #include "SkBlitBWMaskTemplate.h"
 #define blend_8_pixels(mask, dst, sc, dst_scale)                            \
     do {                                                                    \
         if (mask & 0x80) { dst[0] = sc + SkAlphaMulQ(dst[0], dst_scale); }  \
         if (mask & 0x40) { dst[1] = sc + SkAlphaMulQ(dst[1], dst_scale); }  \
         if (mask & 0x20) { dst[2] = sc + SkAlphaMulQ(dst[2], dst_scale); }  \
         if (mask & 0x10) { dst[3] = sc + SkAlphaMulQ(dst[3], dst_scale); }  \
         if (mask & 0x08) { dst[4] = sc + SkAlphaMulQ(dst[4], dst_scale); }  \
         if (mask & 0x04) { dst[5] = sc + SkAlphaMulQ(dst[5], dst_scale); }  \
         if (mask & 0x02) { dst[6] = sc + SkAlphaMulQ(dst[6], dst_scale); }  \
         if (mask & 0x01) { dst[7] = sc + SkAlphaMulQ(dst[7], dst_scale); }  \
     } while (0)
 #define SK_BLITBWMASK_NAME                  SkARGB32_BlendBW
 #define SK_BLITBWMASK_ARGS                  , uint32_t sc, unsigned dst_scale
 #define SK_BLITBWMASK_BLIT8(mask, dst)      blend_8_pixels(mask, dst, sc, dst_scale)
 #define SK_BLITBWMASK_GETADDR               getAddr32
 #define SK_BLITBWMASK_DEVTYPE               uint32_t
 #include "SkBlitBWMaskTemplate.h"
 void SkARGB32_Blitter::blitMask(const SkMask& mask, const SkIRect& clip) {
     SkASSERT(mask.fBounds.contains(clip));
     SkASSERT(fSrcA != 0xFF);
     if (fSrcA == 0) {
         return;
     }
     if (SkBlitMask::BlitColor(fDevice, mask, clip, fColor)) {
         return;
     }
     if (mask.fFormat == SkMask::kBW_Format) {
         SkARGB32_BlendBW(fDevice, mask, clip, fPMColor, SkAlpha255To256(255 - fSrcA));
     } else if (SkMask::kARGB32_Format == mask.fFormat) {
         SkARGB32_Blit32(fDevice, mask, clip, fPMColor);
     }
 }
 void SkARGB32_Opaque_Blitter::blitMask(const SkMask& mask,
                                        const SkIRect& clip) {
     SkASSERT(mask.fBounds.contains(clip));
     if (SkBlitMask::BlitColor(fDevice, mask, clip, fColor)) {
         return;
     }
     if (mask.fFormat == SkMask::kBW_Format) {
         SkARGB32_BlitBW(fDevice, mask, clip, fPMColor);
     } else if (SkMask::kARGB32_Format == mask.fFormat) {
         SkARGB32_Blit32(fDevice, mask, clip, fPMColor);
     }
 }
 ///////////////////////////////////////////////////////////////////////////////
 void SkARGB32_Blitter::blitV(int x, int y, int height, SkAlpha alpha) {
     if (alpha == 0 || fSrcA == 0) {
         return;
     }
     uint32_t* device = fDevice.getAddr32(x, y);
     uint32_t  color = fPMColor;
     if (alpha != 255) {
         color = SkAlphaMulQ(color, SkAlpha255To256(alpha));
     }
     unsigned dst_scale = 255 - SkGetPackedA32(color);
     size_t rowBytes = fDevice.rowBytes();
     while (--height >= 0) {
         device[0] = color + SkAlphaMulQ(device[0], dst_scale);
         device = (uint32_t*)((char*)device + rowBytes);
     }
 }
 void SkARGB32_Blitter::blitRect(int x, int y, int width, int height) {
     SkASSERT(x >= 0 && y >= 0 && x + width <= fDevice.width() && y + height <= fDevice.height());
     if (fSrcA == 0) {
         return;
     }
     uint32_t*   device = fDevice.getAddr32(x, y);
     uint32_t    color = fPMColor;
     size_t      rowBytes = fDevice.rowBytes();
     if (255 == SkGetPackedA32(color)) {
         fColorRect32Proc(device, width, height, rowBytes, color);
     } else {
         while (--height >= 0) {
             fColor32Proc(device, device, width, color);
             device = (uint32_t*)((char*)device + rowBytes);
         }
     }
 }
 #if defined _WIN32 && _MSC_VER >= 1300
 #pragma warning ( pop )
 #endif
 ///////////////////////////////////////////////////////////////////////
 void SkARGB32_Black_Blitter::blitAntiH(int x, int y, const SkAlpha antialias[],
                                        const int16_t runs[]) {
     uint32_t*   device = fDevice.getAddr32(x, y);
     SkPMColor   black = (SkPMColor)(SK_A32_MASK << SK_A32_SHIFT);
     for (;;) {
         int count = runs[0];
         SkASSERT(count >= 0);
         if (count <= 0) {
             return;
         }
         unsigned aa = antialias[0];
         if (aa) {
             if (aa == 255) {
                 sk_memset32(device, black, count);
             } else {
                 SkPMColor src = aa << SK_A32_SHIFT;
                 unsigned dst_scale = 256 - aa;
                 int n = count;
                 do {
                     --n;
                     device[n] = src + SkAlphaMulQ(device[n], dst_scale);
                 } while (n > 0);
             }
         }
         runs += count;
         antialias += count;
         device += count;
     }
 }
 ///////////////////////////////////////////////////////////////////////////////
 // Special version of SkBlitRow::Factory32 that knows we're in kSrc_Mode,
 // instead of kSrcOver_Mode
 static void blend_srcmode(SkPMColor* SK_RESTRICT device,
                           const SkPMColor* SK_RESTRICT span,
                           int count, U8CPU aa) {
     int aa256 = SkAlpha255To256(aa);
     for (int i = 0; i < count; ++i) {
         device[i] = SkFourByteInterp256(span[i], device[i], aa256);
     }
 }
 SkARGB32_Shader_Blitter::SkARGB32_Shader_Blitter(const SkBitmap& device,
                             const SkPaint& paint) : INHERITED(device, paint) {
     fBuffer = (SkPMColor*)sk_malloc_throw(device.width() * (sizeof(SkPMColor)));
     fXfermode = paint.getXfermode();
     SkSafeRef(fXfermode);
     int flags = 0;
     if (!(fShader->getFlags() & SkShader::kOpaqueAlpha_Flag)) {
         flags |= SkBlitRow::kSrcPixelAlpha_Flag32;
     }
     // we call this on the output from the shader
     fProc32 = SkBlitRow::Factory32(flags);
     // we call this on the output from the shader + alpha from the aa buffer
     fProc32Blend = SkBlitRow::Factory32(flags | SkBlitRow::kGlobalAlpha_Flag32);
     fShadeDirectlyIntoDevice = false;
     if (fXfermode == NULL) {
         if (fShader->getFlags() & SkShader::kOpaqueAlpha_Flag) {
             fShadeDirectlyIntoDevice = true;
         }
     } else {
         SkXfermode::Mode mode;
         if (fXfermode->asMode(&mode)) {
             if (SkXfermode::kSrc_Mode == mode) {
                 fShadeDirectlyIntoDevice = true;
                 fProc32Blend = blend_srcmode;
             }
         }
     }
     fConstInY = SkToBool(fShader->getFlags() & SkShader::kConstInY32_Flag);
 }
 SkARGB32_Shader_Blitter::~SkARGB32_Shader_Blitter() {
     SkSafeUnref(fXfermode);
     sk_free(fBuffer);
 }
 void SkARGB32_Shader_Blitter::blitH(int x, int y, int width) {
     SkASSERT(x >= 0 && y >= 0 && x + width <= fDevice.width());
     uint32_t*   device = fDevice.getAddr32(x, y);
     if (fShadeDirectlyIntoDevice) {
         fShader->shadeSpan(x, y, device, width);
     } else {
         SkPMColor*  span = fBuffer;
         fShader->shadeSpan(x, y, span, width);
         if (fXfermode) {
             fXfermode->xfer32(device, span, width, NULL);
         } else {
             fProc32(device, span, width, 255);
         }
     }
 }
 void SkARGB32_Shader_Blitter::blitRect(int x, int y, int width, int height) {
     SkASSERT(x >= 0 && y >= 0 &&
              x + width <= fDevice.width() && y + height <= fDevice.height());
     uint32_t*   device = fDevice.getAddr32(x, y);
     size_t      deviceRB = fDevice.rowBytes();
     SkShader*   shader = fShader;
     SkPMColor*  span = fBuffer;
     if (fConstInY) {
         if (fShadeDirectlyIntoDevice) {
             // shade the first row directly into the device
             fShader->shadeSpan(x, y, device, width);
             span = device;
             while (--height > 0) {
                 device = (uint32_t*)((char*)device + deviceRB);
                 memcpy(device, span, width << 2);
             }
         } else {
             fShader->shadeSpan(x, y, span, width);
             SkXfermode* xfer = fXfermode;
             if (xfer) {
                 do {
                     xfer->xfer32(device, span, width, NULL);
                     y += 1;
                     device = (uint32_t*)((char*)device + deviceRB);
                 } while (--height > 0);
             } else {
                 SkBlitRow::Proc32 proc = fProc32;
                 do {
                     proc(device, span, width, 255);
                     y += 1;
                     device = (uint32_t*)((char*)device + deviceRB);
                 } while (--height > 0);
             }
         }
         return;
     }
     if (fShadeDirectlyIntoDevice) {
         void* ctx;
         SkShader::ShadeProc shadeProc = fShader->asAShadeProc(&ctx);
         if (shadeProc) {
             do {
                 shadeProc(ctx, x, y, device, width);
                 y += 1;
                 device = (uint32_t*)((char*)device + deviceRB);
             } while (--height > 0);
         } else {
             do {
                 shader->shadeSpan(x, y, device, width);
                 y += 1;
                 device = (uint32_t*)((char*)device + deviceRB);
             } while (--height > 0);
         }
     } else {
         SkXfermode* xfer = fXfermode;
         if (xfer) {
             do {
                 shader->shadeSpan(x, y, span, width);
                 xfer->xfer32(device, span, width, NULL);
                 y += 1;
                 device = (uint32_t*)((char*)device + deviceRB);
             } while (--height > 0);
         } else {
             SkBlitRow::Proc32 proc = fProc32;
             do {
                 shader->shadeSpan(x, y, span, width);
                 proc(device, span, width, 255);
                 y += 1;
                 device = (uint32_t*)((char*)device + deviceRB);
             } while (--height > 0);
         }
     }
 }
 void SkARGB32_Shader_Blitter::blitAntiH(int x, int y, const SkAlpha antialias[],
                                         const int16_t runs[]) {
     SkPMColor*  span = fBuffer;
     uint32_t*   device = fDevice.getAddr32(x, y);
     SkShader*   shader = fShader;
     if (fXfermode && !fShadeDirectlyIntoDevice) {
         for (;;) {
             SkXfermode* xfer = fXfermode;
             int count = *runs;
             if (count <= 0)
                 break;
             int aa = *antialias;
             if (aa) {
                 shader->shadeSpan(x, y, span, count);
                 if (aa == 255) {
                     xfer->xfer32(device, span, count, NULL);
                 } else {
                     // count is almost always 1
                     for (int i = count - 1; i >= 0; --i) {
                         xfer->xfer32(&device[i], &span[i], 1, antialias);
                     }
                 }
             }
             device += count;
             runs += count;
             antialias += count;
             x += count;
         }
     } else if (fShadeDirectlyIntoDevice ||
                (fShader->getFlags() & SkShader::kOpaqueAlpha_Flag)) {
         for (;;) {
             int count = *runs;
             if (count <= 0) {
                 break;
             }
             int aa = *antialias;
             if (aa) {
                 if (aa == 255) {
                     // cool, have the shader draw right into the device
                     shader->shadeSpan(x, y, device, count);
                 } else {
                     shader->shadeSpan(x, y, span, count);
                     fProc32Blend(device, span, count, aa);
                 }
             }
             device += count;
             runs += count;
             antialias += count;
             x += count;
         }
     } else {
         for (;;) {
             int count = *runs;
             if (count <= 0) {
                 break;
             }
             int aa = *antialias;
             if (aa) {
                 fShader->shadeSpan(x, y, span, count);
                 if (aa == 255) {
                     fProc32(device, span, count, 255);
                 } else {
                     fProc32Blend(device, span, count, aa);
                 }
             }
             device += count;
             runs += count;
             antialias += count;
             x += count;
         }
     }
 }
 void SkARGB32_Shader_Blitter::blitMask(const SkMask& mask, const SkIRect& clip) {
     // we only handle kA8 with an xfermode
     if (fXfermode && (SkMask::kA8_Format != mask.fFormat)) {
         this->INHERITED::blitMask(mask, clip);
         return;
     }
     SkASSERT(mask.fBounds.contains(clip));
     SkBlitMask::RowProc proc = NULL;
     if (!fXfermode) {
         unsigned flags = 0;
         if (fShader->getFlags() & SkShader::kOpaqueAlpha_Flag) {
             flags |= SkBlitMask::kSrcIsOpaque_RowFlag;
         }
         proc = SkBlitMask::RowFactory(SkBitmap::kARGB_8888_Config, mask.fFormat,
                                       (SkBlitMask::RowFlags)flags);
         if (NULL == proc) {
             this->INHERITED::blitMask(mask, clip);
             return;
         }
     }
     const int x = clip.fLeft;
     const int width = clip.width();
     int y = clip.fTop;
     int height = clip.height();
     char* dstRow = (char*)fDevice.getAddr32(x, y);
     const size_t dstRB = fDevice.rowBytes();
     const uint8_t* maskRow = (const uint8_t*)mask.getAddr(x, y);
     const size_t maskRB = mask.fRowBytes;
     SkShader* shader = fShader;
     SkPMColor* span = fBuffer;
     if (fXfermode) {
         SkASSERT(SkMask::kA8_Format == mask.fFormat);
         SkXfermode* xfer = fXfermode;
         do {
             shader->shadeSpan(x, y, span, width);
             xfer->xfer32((SkPMColor*)dstRow, span, width, maskRow);
             dstRow += dstRB;
             maskRow += maskRB;
             y += 1;
         } while (--height > 0);
     } else {
         do {
             shader->shadeSpan(x, y, span, width);
             proc(dstRow, maskRow, span, width);
             dstRow += dstRB;
             maskRow += maskRB;
             y += 1;
         } while (--height > 0);
     }
 }
 void SkARGB32_Shader_Blitter::blitV(int x, int y, int height, SkAlpha alpha) {
     SkASSERT(x >= 0 && y >= 0 && y + height <= fDevice.height());
     uint32_t*   device = fDevice.getAddr32(x, y);
     size_t      deviceRB = fDevice.rowBytes();
     SkShader*   shader = fShader;
     if (fConstInY) {
         SkPMColor c;
         fShader->shadeSpan(x, y, &c, 1);
         if (fShadeDirectlyIntoDevice) {
             if (255 == alpha) {
                 do {
                     *device = c;
                     device = (uint32_t*)((char*)device + deviceRB);
                 } while (--height > 0);
             } else {
                 do {
                     *device = SkFourByteInterp(c, *device, alpha);
                     device = (uint32_t*)((char*)device + deviceRB);
                 } while (--height > 0);
             }
         } else {
             SkXfermode* xfer = fXfermode;
             if (xfer) {
                 do {
                     xfer->xfer32(device, &c, 1, &alpha);
                     device = (uint32_t*)((char*)device + deviceRB);
                 } while (--height > 0);
             } else {
                 SkBlitRow::Proc32 proc = (255 == alpha) ? fProc32 : fProc32Blend;
                 do {
                     proc(device, &c, 1, alpha);
                     device = (uint32_t*)((char*)device + deviceRB);
                 } while (--height > 0);
             }
         }
         return;
     }
     if (fShadeDirectlyIntoDevice) {
         void* ctx;
         SkShader::ShadeProc shadeProc = fShader->asAShadeProc(&ctx);
         if (255 == alpha) {
             if (shadeProc) {
                 do {
                     shadeProc(ctx, x, y, device, 1);
                     y += 1;
                     device = (uint32_t*)((char*)device + deviceRB);
                 } while (--height > 0);
             } else {
                 do {
                     shader->shadeSpan(x, y, device, 1);
                     y += 1;
                     device = (uint32_t*)((char*)device + deviceRB);
                 } while (--height > 0);
             }
         } else {    // alpha < 255
             SkPMColor c;
             if (shadeProc) {
                 do {
                     shadeProc(ctx, x, y, &c, 1);
                     *device = SkFourByteInterp(c, *device, alpha);
                     y += 1;
                     device = (uint32_t*)((char*)device + deviceRB);
                 } while (--height > 0);
             } else {
                 do {
                     shader->shadeSpan(x, y, &c, 1);
                     *device = SkFourByteInterp(c, *device, alpha);
                     y += 1;
                     device = (uint32_t*)((char*)device + deviceRB);
                 } while (--height > 0);
             }
         }
     } else {
         SkPMColor* span = fBuffer;
         SkXfermode* xfer = fXfermode;
         if (xfer) {
             do {
                 shader->shadeSpan(x, y, span, 1);
                 xfer->xfer32(device, span, 1, &alpha);
                 y += 1;
                 device = (uint32_t*)((char*)device + deviceRB);
             } while (--height > 0);
         } else {
             SkBlitRow::Proc32 proc = (255 == alpha) ? fProc32 : fProc32Blend;
             do {
                 shader->shadeSpan(x, y, span, 1);
                 proc(device, span, 1, alpha);
                 y += 1;
                 device = (uint32_t*)((char*)device + deviceRB);
             } while (--height > 0);
         }
     }
 }

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gfx/skia/trunk/src/core/SkBlitter_ARGB32.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/core/SkBlitter_ARGB32.cpp