src/core/SkBitmapDevice.cpp - platform/external/skqp - Gitiles

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */

 #include "SkBitmapDevice.h"
 #include "SkConfig8888.h"
 #include "SkDraw.h"
 #include "SkRasterClip.h"
 #include "SkShader.h"
 #include "SkSurface.h"

 #define CHECK_FOR_ANNOTATION(paint) \
     do { if (paint.getAnnotation()) { return; } } while (0)

 static bool valid_for_bitmap_device(const SkImageInfo& info,
                                     SkAlphaType* newAlphaType) {
     if (info.width() < 0 || info.height() < 0) {
         return false;
     }

     // TODO: can we stop supporting kUnknown in SkBitmkapDevice?
     if (kUnknown_SkColorType == info.colorType()) {
         if (newAlphaType) {
             *newAlphaType = kIgnore_SkAlphaType;
         }
         return true;
     }

     switch (info.alphaType()) {
         case kPremul_SkAlphaType:
         case kOpaque_SkAlphaType:
             break;
         default:
             return false;
     }

     SkAlphaType canonicalAlphaType = info.alphaType();

     switch (info.colorType()) {
         case kAlpha_8_SkColorType:
             break;
         case kRGB_565_SkColorType:
             canonicalAlphaType = kOpaque_SkAlphaType;
             break;
         case kPMColor_SkColorType:
             break;
         default:
             return false;
     }

     if (newAlphaType) {
         *newAlphaType = canonicalAlphaType;
     }
     return true;
 }

 SkBitmapDevice::SkBitmapDevice(const SkBitmap& bitmap) : fBitmap(bitmap) {
     SkASSERT(valid_for_bitmap_device(bitmap.info(), NULL));
 }

 SkBitmapDevice::SkBitmapDevice(const SkBitmap& bitmap, const SkDeviceProperties& deviceProperties)
     : SkBaseDevice(deviceProperties)
     , fBitmap(bitmap)
 {
     SkASSERT(valid_for_bitmap_device(bitmap.info(), NULL));
 }

 #ifdef SK_SUPPORT_LEGACY_COMPATIBLEDEVICE_CONFIG
 void SkBitmapDevice::init(SkBitmap::Config config, int width, int height, bool isOpaque) {
     fBitmap.setConfig(config, width, height, 0, isOpaque ?
                       kOpaque_SkAlphaType : kPremul_SkAlphaType);

     if (SkBitmap::kNo_Config != config) {
         if (!fBitmap.allocPixels()) {
             // indicate failure by zeroing our bitmap
             fBitmap.setConfig(config, 0, 0, 0, isOpaque ?
                               kOpaque_SkAlphaType : kPremul_SkAlphaType);
         } else if (!isOpaque) {
             fBitmap.eraseColor(SK_ColorTRANSPARENT);
         }
     }
 }

 SkBitmapDevice::SkBitmapDevice(SkBitmap::Config config, int width, int height, bool isOpaque) {
     this->init(config, width, height, isOpaque);
 }

 SkBitmapDevice::SkBitmapDevice(SkBitmap::Config config, int width, int height, bool isOpaque,
                                const SkDeviceProperties& deviceProperties)
     : SkBaseDevice(deviceProperties)
 {
     this->init(config, width, height, isOpaque);
 }
 #endif
 SkBitmapDevice* SkBitmapDevice::Create(const SkImageInfo& origInfo,
                                        const SkDeviceProperties* props) {
     SkImageInfo info = origInfo;
     if (!valid_for_bitmap_device(info, &info.fAlphaType)) {
         return NULL;
     }

     SkBitmap bitmap;

     if (kUnknown_SkColorType == info.colorType()) {
         if (!bitmap.setConfig(info)) {
             return NULL;
         }
     } else {
         if (!bitmap.allocPixels(info)) {
             return NULL;
         }
         if (!bitmap.info().isOpaque()) {
             bitmap.eraseColor(SK_ColorTRANSPARENT);
         }
     }

     if (props) {
         return SkNEW_ARGS(SkBitmapDevice, (bitmap, *props));
     } else {
         return SkNEW_ARGS(SkBitmapDevice, (bitmap));
     }
 }

 SkImageInfo SkBitmapDevice::imageInfo() const {
     return fBitmap.info();
 }

 void SkBitmapDevice::replaceBitmapBackendForRasterSurface(const SkBitmap& bm) {
     SkASSERT(bm.width() == fBitmap.width());
     SkASSERT(bm.height() == fBitmap.height());
     fBitmap = bm;   // intent is to use bm's pixelRef (and rowbytes/config)
     fBitmap.lockPixels();
 }

 SkBaseDevice* SkBitmapDevice::onCreateDevice(const SkImageInfo& info, Usage usage) {
     return SkBitmapDevice::Create(info, &this->getDeviceProperties());
 }

 void SkBitmapDevice::lockPixels() {
     if (fBitmap.lockPixelsAreWritable()) {
         fBitmap.lockPixels();
     }
 }

 void SkBitmapDevice::unlockPixels() {
     if (fBitmap.lockPixelsAreWritable()) {
         fBitmap.unlockPixels();
     }
 }

 void SkBitmapDevice::clear(SkColor color) {
     fBitmap.eraseColor(color);
 }

 const SkBitmap& SkBitmapDevice::onAccessBitmap() {
     return fBitmap;
 }

 bool SkBitmapDevice::canHandleImageFilter(const SkImageFilter*) {
     return false;
 }

 bool SkBitmapDevice::filterImage(const SkImageFilter* filter, const SkBitmap& src,
                                  const SkMatrix& ctm, SkBitmap* result,
                                  SkIPoint* offset) {
     return false;
 }

 bool SkBitmapDevice::allowImageFilter(const SkImageFilter*) {
     return true;
 }

 bool SkBitmapDevice::onReadPixels(const SkBitmap& bitmap,
                                   int x, int y,
                                   SkCanvas::Config8888 config8888) {
     SkASSERT(SkBitmap::kARGB_8888_Config == bitmap.config());
     SkASSERT(!bitmap.isNull());
     SkASSERT(SkIRect::MakeWH(this->width(), this->height()).contains(SkIRect::MakeXYWH(x, y,
                                                                           bitmap.width(),
                                                                           bitmap.height())));

     SkIRect srcRect = SkIRect::MakeXYWH(x, y, bitmap.width(), bitmap.height());
     const SkBitmap& src = this->accessBitmap(false);

     SkBitmap subset;
     if (!src.extractSubset(&subset, srcRect)) {
         return false;
     }
     if (kPMColor_SkColorType != subset.colorType()) {
         // It'd be preferable to do this directly to bitmap.
         subset.copyTo(&subset, kPMColor_SkColorType);
     }
     SkAutoLockPixels alp(bitmap);
     uint32_t* bmpPixels = reinterpret_cast<uint32_t*>(bitmap.getPixels());
     SkCopyBitmapToConfig8888(bmpPixels, bitmap.rowBytes(), config8888, subset);
     return true;
 }

 #ifdef SK_SUPPORT_LEGACY_WRITEPIXELSCONFIG
 void SkBitmapDevice::writePixels(const SkBitmap& bitmap,
                                  int x, int y,
                                  SkCanvas::Config8888 config8888) {
     if (bitmap.isNull() || bitmap.getTexture()) {
         return;
     }
     const SkBitmap* sprite = &bitmap;
     // check whether we have to handle a config8888 that doesn't match SkPMColor
     if (SkBitmap::kARGB_8888_Config == bitmap.config() &&
         SkCanvas::kNative_Premul_Config8888 != config8888 &&
         kPMColorAlias != config8888) {

         // We're going to have to convert from a config8888 to the native config
         // First we clip to the device bounds.
         SkBitmap dstBmp = this->accessBitmap(true);
         SkIRect spriteRect = SkIRect::MakeXYWH(x, y,
                                                bitmap.width(), bitmap.height());
         SkIRect devRect = SkIRect::MakeWH(dstBmp.width(), dstBmp.height());
         if (!spriteRect.intersect(devRect)) {
             return;
         }

         // write directly to the device if it has pixels and is SkPMColor
         bool drawSprite;
         if (SkBitmap::kARGB_8888_Config == dstBmp.config() && !dstBmp.isNull()) {
             // we can write directly to the dst when doing the conversion
             dstBmp.extractSubset(&dstBmp, spriteRect);
             drawSprite = false;
         } else {
             // we convert to a temporary bitmap and draw that as a sprite
             if (!dstBmp.allocPixels(SkImageInfo::MakeN32Premul(spriteRect.width(),
                                                                spriteRect.height()))) {
                 return;
             }
             drawSprite = true;
         }

         // copy pixels to dstBmp and convert from config8888 to native config.
         SkAutoLockPixels alp(bitmap);
         uint32_t* srcPixels = bitmap.getAddr32(spriteRect.fLeft - x,
                                                spriteRect.fTop - y);
         SkCopyConfig8888ToBitmap(dstBmp,
                                  srcPixels,
                                  bitmap.rowBytes(),
                                  config8888);

         if (drawSprite) {
             // we've clipped the sprite when we made a copy
             x = spriteRect.fLeft;
             y = spriteRect.fTop;
             sprite = &dstBmp;
         } else {
             return;
         }
     }

     SkPaint paint;
     paint.setXfermodeMode(SkXfermode::kSrc_Mode);
     SkRasterClip clip(SkIRect::MakeWH(fBitmap.width(), fBitmap.height()));
     SkDraw  draw;
     draw.fRC = &clip;
     draw.fClip = &clip.bwRgn();
     draw.fBitmap = &fBitmap; // canvas should have already called accessBitmap
     draw.fMatrix = &SkMatrix::I();
     this->drawSprite(draw, *sprite, x, y, paint);
 }
 #endif

 void* SkBitmapDevice::onAccessPixels(SkImageInfo* info, size_t* rowBytes) {
     if (fBitmap.getPixels()) {
         *info = fBitmap.info();
         *rowBytes = fBitmap.rowBytes();
         return fBitmap.getPixels();
     }
     return NULL;
 }

 static void rect_memcpy(void* dst, size_t dstRB, const void* src, size_t srcRB, size_t bytesPerRow,
                         int rowCount) {
     SkASSERT(bytesPerRow <= srcRB);
     SkASSERT(bytesPerRow <= dstRB);
     for (int i = 0; i < rowCount; ++i) {
         memcpy(dst, src, bytesPerRow);
         dst = (char*)dst + dstRB;
         src = (const char*)src + srcRB;
     }
 }

 static bool info2config8888(const SkImageInfo& info, SkCanvas::Config8888* config) {
     bool pre;
     switch (info.alphaType()) {
         case kPremul_SkAlphaType:
         case kOpaque_SkAlphaType:
             pre = true;
             break;
         case kUnpremul_SkAlphaType:
             pre = false;
             break;
         default:
             return false;
     }
     switch (info.colorType()) {
         case kRGBA_8888_SkColorType:
             *config = pre ? SkCanvas::kRGBA_Premul_Config8888 : SkCanvas::kRGBA_Unpremul_Config8888;
             return true;
         case kBGRA_8888_SkColorType:
             *config = pre ? SkCanvas::kBGRA_Premul_Config8888 : SkCanvas::kBGRA_Unpremul_Config8888;
             return true;
         default:
             return false;
     }
 }

 // TODO: make this guy real, and not rely on legacy config8888 utility
 #include "SkConfig8888.h"
 static bool write_pixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes,
                          const SkImageInfo& srcInfo, const void* srcPixels, size_t srcRowBytes) {
     if (srcInfo.dimensions() != dstInfo.dimensions()) {
         return false;
     }
     if (4 == srcInfo.bytesPerPixel() && 4 == dstInfo.bytesPerPixel()) {
         SkCanvas::Config8888 srcConfig, dstConfig;
         if (!info2config8888(srcInfo, &srcConfig) || !info2config8888(dstInfo, &dstConfig)) {
             return false;
         }
         SkConvertConfig8888Pixels((uint32_t*)dstPixels, dstRowBytes, dstConfig,
                                   (const uint32_t*)srcPixels, srcRowBytes, srcConfig,
                                   srcInfo.width(), srcInfo.height());
         return true;
     }
     if (srcInfo.colorType() == dstInfo.colorType()) {
         switch (srcInfo.colorType()) {
             case kRGB_565_SkColorType:
             case kAlpha_8_SkColorType:
                 break;
             case kARGB_4444_SkColorType:
                 if (srcInfo.alphaType() != dstInfo.alphaType()) {
                     return false;
                 }
                 break;
             default:
                 return false;
         }
         rect_memcpy(dstPixels, dstRowBytes, srcPixels, srcRowBytes,
                     srcInfo.width() * srcInfo.bytesPerPixel(), srcInfo.height());
     }
     // TODO: add support for more conversions as needed
     return false;
 }

 bool SkBitmapDevice::onWritePixels(const SkImageInfo& srcInfo, const void* srcPixels,
                                    size_t srcRowBytes, int x, int y) {
     // since we don't stop creating un-pixeled devices yet, check for no pixels here
     if (NULL == fBitmap.getPixels()) {
         return false;
     }

     SkImageInfo dstInfo = fBitmap.info();
     dstInfo.fWidth = srcInfo.width();
     dstInfo.fHeight = srcInfo.height();

     void* dstPixels = fBitmap.getAddr(x, y);
     size_t dstRowBytes = fBitmap.rowBytes();

     if (write_pixels(dstInfo, dstPixels, dstRowBytes, srcInfo, srcPixels, srcRowBytes)) {
         fBitmap.notifyPixelsChanged();
         return true;
     }
     return false;
 }

 ///////////////////////////////////////////////////////////////////////////////

 void SkBitmapDevice::drawPaint(const SkDraw& draw, const SkPaint& paint) {
     draw.drawPaint(paint);
 }

 void SkBitmapDevice::drawPoints(const SkDraw& draw, SkCanvas::PointMode mode, size_t count,
                                 const SkPoint pts[], const SkPaint& paint) {
     CHECK_FOR_ANNOTATION(paint);
     draw.drawPoints(mode, count, pts, paint);
 }

 void SkBitmapDevice::drawRect(const SkDraw& draw, const SkRect& r, const SkPaint& paint) {
     CHECK_FOR_ANNOTATION(paint);
     draw.drawRect(r, paint);
 }

 void SkBitmapDevice::drawOval(const SkDraw& draw, const SkRect& oval, const SkPaint& paint) {
     CHECK_FOR_ANNOTATION(paint);

     SkPath path;
     path.addOval(oval);
     // call the VIRTUAL version, so any subclasses who do handle drawPath aren't
     // required to override drawOval.
     this->drawPath(draw, path, paint, NULL, true);
 }

 void SkBitmapDevice::drawRRect(const SkDraw& draw, const SkRRect& rrect, const SkPaint& paint) {
     CHECK_FOR_ANNOTATION(paint);

 #ifdef SK_IGNORE_BLURRED_RRECT_OPT
     SkPath  path;

     path.addRRect(rrect);
     // call the VIRTUAL version, so any subclasses who do handle drawPath aren't
     // required to override drawRRect.
     this->drawPath(draw, path, paint, NULL, true);
 #else
     draw.drawRRect(rrect, paint);
 #endif
 }

 void SkBitmapDevice::drawPath(const SkDraw& draw, const SkPath& path,
                               const SkPaint& paint, const SkMatrix* prePathMatrix,
                               bool pathIsMutable) {
     CHECK_FOR_ANNOTATION(paint);
     draw.drawPath(path, paint, prePathMatrix, pathIsMutable);
 }

 void SkBitmapDevice::drawBitmap(const SkDraw& draw, const SkBitmap& bitmap,
                                 const SkMatrix& matrix, const SkPaint& paint) {
     draw.drawBitmap(bitmap, matrix, paint);
 }

 void SkBitmapDevice::drawBitmapRect(const SkDraw& draw, const SkBitmap& bitmap,
                                     const SkRect* src, const SkRect& dst,
                                     const SkPaint& paint,
                                     SkCanvas::DrawBitmapRectFlags flags) {
     SkMatrix    matrix;
     SkRect      bitmapBounds, tmpSrc, tmpDst;
     SkBitmap    tmpBitmap;

     bitmapBounds.isetWH(bitmap.width(), bitmap.height());

     // Compute matrix from the two rectangles
     if (src) {
         tmpSrc = *src;
     } else {
         tmpSrc = bitmapBounds;
     }
     matrix.setRectToRect(tmpSrc, dst, SkMatrix::kFill_ScaleToFit);

     const SkRect* dstPtr = &dst;
     const SkBitmap* bitmapPtr = &bitmap;

     // clip the tmpSrc to the bounds of the bitmap, and recompute dstRect if
     // needed (if the src was clipped). No check needed if src==null.
     if (src) {
         if (!bitmapBounds.contains(*src)) {
             if (!tmpSrc.intersect(bitmapBounds)) {
                 return; // nothing to draw
             }
             // recompute dst, based on the smaller tmpSrc
             matrix.mapRect(&tmpDst, tmpSrc);
             dstPtr = &tmpDst;
         }

         // since we may need to clamp to the borders of the src rect within
         // the bitmap, we extract a subset.
         SkIRect srcIR;
         tmpSrc.roundOut(&srcIR);
         if (!bitmap.extractSubset(&tmpBitmap, srcIR)) {
             return;
         }
         bitmapPtr = &tmpBitmap;

         // Since we did an extract, we need to adjust the matrix accordingly
         SkScalar dx = 0, dy = 0;
         if (srcIR.fLeft > 0) {
             dx = SkIntToScalar(srcIR.fLeft);
         }
         if (srcIR.fTop > 0) {
             dy = SkIntToScalar(srcIR.fTop);
         }
         if (dx || dy) {
             matrix.preTranslate(dx, dy);
         }

         SkRect extractedBitmapBounds;
         extractedBitmapBounds.isetWH(bitmapPtr->width(), bitmapPtr->height());
         if (extractedBitmapBounds == tmpSrc) {
             // no fractional part in src, we can just call drawBitmap
             goto USE_DRAWBITMAP;
         }
     } else {
         USE_DRAWBITMAP:
         // We can go faster by just calling drawBitmap, which will concat the
         // matrix with the CTM, and try to call drawSprite if it can. If not,
         // it will make a shader and call drawRect, as we do below.
         this->drawBitmap(draw, *bitmapPtr, matrix, paint);
         return;
     }

     // construct a shader, so we can call drawRect with the dst
     SkShader* s = SkShader::CreateBitmapShader(*bitmapPtr,
                                                SkShader::kClamp_TileMode,
                                                SkShader::kClamp_TileMode);
     if (NULL == s) {
         return;
     }
     s->setLocalMatrix(matrix);

     SkPaint paintWithShader(paint);
     paintWithShader.setStyle(SkPaint::kFill_Style);
     paintWithShader.setShader(s)->unref();

     // Call ourself, in case the subclass wanted to share this setup code
     // but handle the drawRect code themselves.
     this->drawRect(draw, *dstPtr, paintWithShader);
 }

 void SkBitmapDevice::drawSprite(const SkDraw& draw, const SkBitmap& bitmap,
                                 int x, int y, const SkPaint& paint) {
     draw.drawSprite(bitmap, x, y, paint);
 }

 void SkBitmapDevice::drawText(const SkDraw& draw, const void* text, size_t len,
                               SkScalar x, SkScalar y, const SkPaint& paint) {
     draw.drawText((const char*)text, len, x, y, paint);
 }

 void SkBitmapDevice::drawPosText(const SkDraw& draw, const void* text, size_t len,
                                  const SkScalar xpos[], SkScalar y,
                                  int scalarsPerPos, const SkPaint& paint) {
     draw.drawPosText((const char*)text, len, xpos, y, scalarsPerPos, paint);
 }

 void SkBitmapDevice::drawTextOnPath(const SkDraw& draw, const void* text,
                                     size_t len, const SkPath& path,
                                     const SkMatrix* matrix,
                                     const SkPaint& paint) {
     draw.drawTextOnPath((const char*)text, len, path, matrix, paint);
 }

 void SkBitmapDevice::drawVertices(const SkDraw& draw, SkCanvas::VertexMode vmode,
                                   int vertexCount,
                                   const SkPoint verts[], const SkPoint textures[],
                                   const SkColor colors[], SkXfermode* xmode,
                                   const uint16_t indices[], int indexCount,
                                   const SkPaint& paint) {
     draw.drawVertices(vmode, vertexCount, verts, textures, colors, xmode,
                       indices, indexCount, paint);
 }

 void SkBitmapDevice::drawDevice(const SkDraw& draw, SkBaseDevice* device,
                                 int x, int y, const SkPaint& paint) {
     const SkBitmap& src = device->accessBitmap(false);
     draw.drawSprite(src, x, y, paint);
 }

 SkSurface* SkBitmapDevice::newSurface(const SkImageInfo& info) {
     return SkSurface::NewRaster(info);
 }

 const void* SkBitmapDevice::peekPixels(SkImageInfo* info, size_t* rowBytes) {
     if (fBitmap.getPixels() && fBitmap.asImageInfo(info)) {
         if (rowBytes) {
             *rowBytes = fBitmap.rowBytes();
         }
         return fBitmap.getPixels();
     }
     return NULL;
 }

 ///////////////////////////////////////////////////////////////////////////////

 bool SkBitmapDevice::filterTextFlags(const SkPaint& paint, TextFlags* flags) {
     if (!paint.isLCDRenderText() || !paint.isAntiAlias()) {
         // we're cool with the paint as is
         return false;
     }

     if (SkBitmap::kARGB_8888_Config != fBitmap.config() ||
         paint.getRasterizer() ||
         paint.getPathEffect() ||
         paint.isFakeBoldText() ||
         paint.getStyle() != SkPaint::kFill_Style ||
         !SkXfermode::IsMode(paint.getXfermode(), SkXfermode::kSrcOver_Mode)) {
         // turn off lcd
         flags->fFlags = paint.getFlags() & ~SkPaint::kLCDRenderText_Flag;
         flags->fHinting = paint.getHinting();
         return true;
     }
     // we're cool with the paint as is
     return false;
 }
	/*
	* Copyright 2013 Google Inc.
	*
	* Use of this source code is governed by a BSD-style license that can be
	* found in the LICENSE file.
	*/

	#include "SkBitmapDevice.h"
	#include "SkConfig8888.h"
	#include "SkDraw.h"
	#include "SkRasterClip.h"
	#include "SkShader.h"
	#include "SkSurface.h"

	#define CHECK_FOR_ANNOTATION(paint) \
	do { if (paint.getAnnotation()) { return; } } while (0)

	static bool valid_for_bitmap_device(const SkImageInfo& info,
	SkAlphaType* newAlphaType) {
	if (info.width() < 0 \|\| info.height() < 0) {
	return false;
	}

	// TODO: can we stop supporting kUnknown in SkBitmkapDevice?
	if (kUnknown_SkColorType == info.colorType()) {
	if (newAlphaType) {
	*newAlphaType = kIgnore_SkAlphaType;
	}
	return true;
	}

	switch (info.alphaType()) {
	case kPremul_SkAlphaType:
	case kOpaque_SkAlphaType:
	break;
	default:
	return false;
	}

	SkAlphaType canonicalAlphaType = info.alphaType();

	switch (info.colorType()) {
	case kAlpha_8_SkColorType:
	break;
	case kRGB_565_SkColorType:
	canonicalAlphaType = kOpaque_SkAlphaType;
	break;
	case kPMColor_SkColorType:
	break;
	default:
	return false;
	}

	if (newAlphaType) {
	*newAlphaType = canonicalAlphaType;
	}
	return true;
	}

	SkBitmapDevice::SkBitmapDevice(const SkBitmap& bitmap) : fBitmap(bitmap) {
	SkASSERT(valid_for_bitmap_device(bitmap.info(), NULL));
	}

	SkBitmapDevice::SkBitmapDevice(const SkBitmap& bitmap, const SkDeviceProperties& deviceProperties)
	: SkBaseDevice(deviceProperties)
	, fBitmap(bitmap)
	{
	SkASSERT(valid_for_bitmap_device(bitmap.info(), NULL));
	}

	#ifdef SK_SUPPORT_LEGACY_COMPATIBLEDEVICE_CONFIG
	void SkBitmapDevice::init(SkBitmap::Config config, int width, int height, bool isOpaque) {
	fBitmap.setConfig(config, width, height, 0, isOpaque ?
	kOpaque_SkAlphaType : kPremul_SkAlphaType);

	if (SkBitmap::kNo_Config != config) {
	if (!fBitmap.allocPixels()) {
	// indicate failure by zeroing our bitmap
	fBitmap.setConfig(config, 0, 0, 0, isOpaque ?
	kOpaque_SkAlphaType : kPremul_SkAlphaType);
	} else if (!isOpaque) {
	fBitmap.eraseColor(SK_ColorTRANSPARENT);
	}
	}
	}

	SkBitmapDevice::SkBitmapDevice(SkBitmap::Config config, int width, int height, bool isOpaque) {
	this->init(config, width, height, isOpaque);
	}

	SkBitmapDevice::SkBitmapDevice(SkBitmap::Config config, int width, int height, bool isOpaque,
	const SkDeviceProperties& deviceProperties)
	: SkBaseDevice(deviceProperties)
	{
	this->init(config, width, height, isOpaque);
	}
	#endif
	SkBitmapDevice* SkBitmapDevice::Create(const SkImageInfo& origInfo,
	const SkDeviceProperties* props) {
	SkImageInfo info = origInfo;
	if (!valid_for_bitmap_device(info, &info.fAlphaType)) {
	return NULL;
	}

	SkBitmap bitmap;

	if (kUnknown_SkColorType == info.colorType()) {
	if (!bitmap.setConfig(info)) {
	return NULL;
	}
	} else {
	if (!bitmap.allocPixels(info)) {
	return NULL;
	}
	if (!bitmap.info().isOpaque()) {
	bitmap.eraseColor(SK_ColorTRANSPARENT);
	}
	}

	if (props) {
	return SkNEW_ARGS(SkBitmapDevice, (bitmap, *props));
	} else {
	return SkNEW_ARGS(SkBitmapDevice, (bitmap));
	}
	}

	SkImageInfo SkBitmapDevice::imageInfo() const {
	return fBitmap.info();
	}

	void SkBitmapDevice::replaceBitmapBackendForRasterSurface(const SkBitmap& bm) {
	SkASSERT(bm.width() == fBitmap.width());
	SkASSERT(bm.height() == fBitmap.height());
	fBitmap = bm; // intent is to use bm's pixelRef (and rowbytes/config)
	fBitmap.lockPixels();
	}

	SkBaseDevice* SkBitmapDevice::onCreateDevice(const SkImageInfo& info, Usage usage) {
	return SkBitmapDevice::Create(info, &this->getDeviceProperties());
	}

	void SkBitmapDevice::lockPixels() {
	if (fBitmap.lockPixelsAreWritable()) {
	fBitmap.lockPixels();
	}
	}

	void SkBitmapDevice::unlockPixels() {
	if (fBitmap.lockPixelsAreWritable()) {
	fBitmap.unlockPixels();
	}
	}

	void SkBitmapDevice::clear(SkColor color) {
	fBitmap.eraseColor(color);
	}

	const SkBitmap& SkBitmapDevice::onAccessBitmap() {
	return fBitmap;
	}

	bool SkBitmapDevice::canHandleImageFilter(const SkImageFilter*) {
	return false;
	}

	bool SkBitmapDevice::filterImage(const SkImageFilter* filter, const SkBitmap& src,
	const SkMatrix& ctm, SkBitmap* result,
	SkIPoint* offset) {
	return false;
	}

	bool SkBitmapDevice::allowImageFilter(const SkImageFilter*) {
	return true;
	}

	bool SkBitmapDevice::onReadPixels(const SkBitmap& bitmap,
	int x, int y,
	SkCanvas::Config8888 config8888) {
	SkASSERT(SkBitmap::kARGB_8888_Config == bitmap.config());
	SkASSERT(!bitmap.isNull());
	SkASSERT(SkIRect::MakeWH(this->width(), this->height()).contains(SkIRect::MakeXYWH(x, y,
	bitmap.width(),
	bitmap.height())));

	SkIRect srcRect = SkIRect::MakeXYWH(x, y, bitmap.width(), bitmap.height());
	const SkBitmap& src = this->accessBitmap(false);

	SkBitmap subset;
	if (!src.extractSubset(&subset, srcRect)) {
	return false;
	}
	if (kPMColor_SkColorType != subset.colorType()) {
	// It'd be preferable to do this directly to bitmap.
	subset.copyTo(&subset, kPMColor_SkColorType);
	}
	SkAutoLockPixels alp(bitmap);
	uint32_t* bmpPixels = reinterpret_cast<uint32_t*>(bitmap.getPixels());
	SkCopyBitmapToConfig8888(bmpPixels, bitmap.rowBytes(), config8888, subset);
	return true;
	}

	#ifdef SK_SUPPORT_LEGACY_WRITEPIXELSCONFIG
	void SkBitmapDevice::writePixels(const SkBitmap& bitmap,
	int x, int y,
	SkCanvas::Config8888 config8888) {
	if (bitmap.isNull() \|\| bitmap.getTexture()) {
	return;
	}
	const SkBitmap* sprite = &bitmap;
	// check whether we have to handle a config8888 that doesn't match SkPMColor
	if (SkBitmap::kARGB_8888_Config == bitmap.config() &&
	SkCanvas::kNative_Premul_Config8888 != config8888 &&
	kPMColorAlias != config8888) {

	// We're going to have to convert from a config8888 to the native config
	// First we clip to the device bounds.
	SkBitmap dstBmp = this->accessBitmap(true);
	SkIRect spriteRect = SkIRect::MakeXYWH(x, y,
	bitmap.width(), bitmap.height());
	SkIRect devRect = SkIRect::MakeWH(dstBmp.width(), dstBmp.height());
	if (!spriteRect.intersect(devRect)) {
	return;
	}

	// write directly to the device if it has pixels and is SkPMColor
	bool drawSprite;
	if (SkBitmap::kARGB_8888_Config == dstBmp.config() && !dstBmp.isNull()) {
	// we can write directly to the dst when doing the conversion
	dstBmp.extractSubset(&dstBmp, spriteRect);
	drawSprite = false;
	} else {
	// we convert to a temporary bitmap and draw that as a sprite
	if (!dstBmp.allocPixels(SkImageInfo::MakeN32Premul(spriteRect.width(),
	spriteRect.height()))) {
	return;
	}
	drawSprite = true;
	}

	// copy pixels to dstBmp and convert from config8888 to native config.
	SkAutoLockPixels alp(bitmap);
	uint32_t* srcPixels = bitmap.getAddr32(spriteRect.fLeft - x,
	spriteRect.fTop - y);
	SkCopyConfig8888ToBitmap(dstBmp,
	srcPixels,
	bitmap.rowBytes(),
	config8888);

	if (drawSprite) {
	// we've clipped the sprite when we made a copy
	x = spriteRect.fLeft;
	y = spriteRect.fTop;
	sprite = &dstBmp;
	} else {
	return;
	}
	}

	SkPaint paint;
	paint.setXfermodeMode(SkXfermode::kSrc_Mode);
	SkRasterClip clip(SkIRect::MakeWH(fBitmap.width(), fBitmap.height()));
	SkDraw draw;
	draw.fRC = &clip;
	draw.fClip = &clip.bwRgn();
	draw.fBitmap = &fBitmap; // canvas should have already called accessBitmap
	draw.fMatrix = &SkMatrix::I();
	this->drawSprite(draw, *sprite, x, y, paint);
	}
	#endif

	void* SkBitmapDevice::onAccessPixels(SkImageInfo* info, size_t* rowBytes) {
	if (fBitmap.getPixels()) {
	*info = fBitmap.info();
	*rowBytes = fBitmap.rowBytes();
	return fBitmap.getPixels();
	}
	return NULL;
	}

	static void rect_memcpy(void* dst, size_t dstRB, const void* src, size_t srcRB, size_t bytesPerRow,
	int rowCount) {
	SkASSERT(bytesPerRow <= srcRB);
	SkASSERT(bytesPerRow <= dstRB);
	for (int i = 0; i < rowCount; ++i) {
	memcpy(dst, src, bytesPerRow);
	dst = (char*)dst + dstRB;
	src = (const char*)src + srcRB;
	}
	}

	static bool info2config8888(const SkImageInfo& info, SkCanvas::Config8888* config) {
	bool pre;
	switch (info.alphaType()) {
	case kPremul_SkAlphaType:
	case kOpaque_SkAlphaType:
	pre = true;
	break;
	case kUnpremul_SkAlphaType:
	pre = false;
	break;
	default:
	return false;
	}
	switch (info.colorType()) {
	case kRGBA_8888_SkColorType:
	*config = pre ? SkCanvas::kRGBA_Premul_Config8888 : SkCanvas::kRGBA_Unpremul_Config8888;
	return true;
	case kBGRA_8888_SkColorType:
	*config = pre ? SkCanvas::kBGRA_Premul_Config8888 : SkCanvas::kBGRA_Unpremul_Config8888;
	return true;
	default:
	return false;
	}
	}

	// TODO: make this guy real, and not rely on legacy config8888 utility
	#include "SkConfig8888.h"
	static bool write_pixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes,
	const SkImageInfo& srcInfo, const void* srcPixels, size_t srcRowBytes) {
	if (srcInfo.dimensions() != dstInfo.dimensions()) {
	return false;
	}
	if (4 == srcInfo.bytesPerPixel() && 4 == dstInfo.bytesPerPixel()) {
	SkCanvas::Config8888 srcConfig, dstConfig;
	if (!info2config8888(srcInfo, &srcConfig) \|\| !info2config8888(dstInfo, &dstConfig)) {
	return false;
	}
	SkConvertConfig8888Pixels((uint32_t*)dstPixels, dstRowBytes, dstConfig,
	(const uint32_t*)srcPixels, srcRowBytes, srcConfig,
	srcInfo.width(), srcInfo.height());
	return true;
	}
	if (srcInfo.colorType() == dstInfo.colorType()) {
	switch (srcInfo.colorType()) {
	case kRGB_565_SkColorType:
	case kAlpha_8_SkColorType:
	break;
	case kARGB_4444_SkColorType:
	if (srcInfo.alphaType() != dstInfo.alphaType()) {
	return false;
	}
	break;
	default:
	return false;
	}
	rect_memcpy(dstPixels, dstRowBytes, srcPixels, srcRowBytes,
	srcInfo.width() * srcInfo.bytesPerPixel(), srcInfo.height());
	}
	// TODO: add support for more conversions as needed
	return false;
	}

	bool SkBitmapDevice::onWritePixels(const SkImageInfo& srcInfo, const void* srcPixels,
	size_t srcRowBytes, int x, int y) {
	// since we don't stop creating un-pixeled devices yet, check for no pixels here
	if (NULL == fBitmap.getPixels()) {
	return false;
	}

	SkImageInfo dstInfo = fBitmap.info();
	dstInfo.fWidth = srcInfo.width();
	dstInfo.fHeight = srcInfo.height();

	void* dstPixels = fBitmap.getAddr(x, y);
	size_t dstRowBytes = fBitmap.rowBytes();

	if (write_pixels(dstInfo, dstPixels, dstRowBytes, srcInfo, srcPixels, srcRowBytes)) {
	fBitmap.notifyPixelsChanged();
	return true;
	}
	return false;
	}

	///////////////////////////////////////////////////////////////////////////////

	void SkBitmapDevice::drawPaint(const SkDraw& draw, const SkPaint& paint) {
	draw.drawPaint(paint);
	}

	void SkBitmapDevice::drawPoints(const SkDraw& draw, SkCanvas::PointMode mode, size_t count,
	const SkPoint pts[], const SkPaint& paint) {
	CHECK_FOR_ANNOTATION(paint);
	draw.drawPoints(mode, count, pts, paint);
	}

	void SkBitmapDevice::drawRect(const SkDraw& draw, const SkRect& r, const SkPaint& paint) {
	CHECK_FOR_ANNOTATION(paint);
	draw.drawRect(r, paint);
	}

	void SkBitmapDevice::drawOval(const SkDraw& draw, const SkRect& oval, const SkPaint& paint) {
	CHECK_FOR_ANNOTATION(paint);

	SkPath path;
	path.addOval(oval);
	// call the VIRTUAL version, so any subclasses who do handle drawPath aren't
	// required to override drawOval.
	this->drawPath(draw, path, paint, NULL, true);
	}

	void SkBitmapDevice::drawRRect(const SkDraw& draw, const SkRRect& rrect, const SkPaint& paint) {
	CHECK_FOR_ANNOTATION(paint);

	#ifdef SK_IGNORE_BLURRED_RRECT_OPT
	SkPath path;

	path.addRRect(rrect);
	// call the VIRTUAL version, so any subclasses who do handle drawPath aren't
	// required to override drawRRect.
	this->drawPath(draw, path, paint, NULL, true);
	#else
	draw.drawRRect(rrect, paint);
	#endif
	}

	void SkBitmapDevice::drawPath(const SkDraw& draw, const SkPath& path,
	const SkPaint& paint, const SkMatrix* prePathMatrix,
	bool pathIsMutable) {
	CHECK_FOR_ANNOTATION(paint);
	draw.drawPath(path, paint, prePathMatrix, pathIsMutable);
	}

	void SkBitmapDevice::drawBitmap(const SkDraw& draw, const SkBitmap& bitmap,
	const SkMatrix& matrix, const SkPaint& paint) {
	draw.drawBitmap(bitmap, matrix, paint);
	}

	void SkBitmapDevice::drawBitmapRect(const SkDraw& draw, const SkBitmap& bitmap,
	const SkRect* src, const SkRect& dst,
	const SkPaint& paint,
	SkCanvas::DrawBitmapRectFlags flags) {
	SkMatrix matrix;
	SkRect bitmapBounds, tmpSrc, tmpDst;
	SkBitmap tmpBitmap;

	bitmapBounds.isetWH(bitmap.width(), bitmap.height());

	// Compute matrix from the two rectangles
	if (src) {
	tmpSrc = *src;
	} else {
	tmpSrc = bitmapBounds;
	}
	matrix.setRectToRect(tmpSrc, dst, SkMatrix::kFill_ScaleToFit);

	const SkRect* dstPtr = &dst;
	const SkBitmap* bitmapPtr = &bitmap;

	// clip the tmpSrc to the bounds of the bitmap, and recompute dstRect if
	// needed (if the src was clipped). No check needed if src==null.
	if (src) {
	if (!bitmapBounds.contains(*src)) {
	if (!tmpSrc.intersect(bitmapBounds)) {
	return; // nothing to draw
	}
	// recompute dst, based on the smaller tmpSrc
	matrix.mapRect(&tmpDst, tmpSrc);
	dstPtr = &tmpDst;
	}

	// since we may need to clamp to the borders of the src rect within
	// the bitmap, we extract a subset.
	SkIRect srcIR;
	tmpSrc.roundOut(&srcIR);
	if (!bitmap.extractSubset(&tmpBitmap, srcIR)) {
	return;
	}
	bitmapPtr = &tmpBitmap;

	// Since we did an extract, we need to adjust the matrix accordingly
	SkScalar dx = 0, dy = 0;
	if (srcIR.fLeft > 0) {
	dx = SkIntToScalar(srcIR.fLeft);
	}
	if (srcIR.fTop > 0) {
	dy = SkIntToScalar(srcIR.fTop);
	}
	if (dx \|\| dy) {
	matrix.preTranslate(dx, dy);
	}

	SkRect extractedBitmapBounds;
	extractedBitmapBounds.isetWH(bitmapPtr->width(), bitmapPtr->height());
	if (extractedBitmapBounds == tmpSrc) {
	// no fractional part in src, we can just call drawBitmap
	goto USE_DRAWBITMAP;
	}
	} else {
	USE_DRAWBITMAP:
	// We can go faster by just calling drawBitmap, which will concat the
	// matrix with the CTM, and try to call drawSprite if it can. If not,
	// it will make a shader and call drawRect, as we do below.
	this->drawBitmap(draw, *bitmapPtr, matrix, paint);
	return;
	}

	// construct a shader, so we can call drawRect with the dst
	SkShader* s = SkShader::CreateBitmapShader(*bitmapPtr,
	SkShader::kClamp_TileMode,
	SkShader::kClamp_TileMode);
	if (NULL == s) {
	return;
	}
	s->setLocalMatrix(matrix);

	SkPaint paintWithShader(paint);
	paintWithShader.setStyle(SkPaint::kFill_Style);
	paintWithShader.setShader(s)->unref();

	// Call ourself, in case the subclass wanted to share this setup code
	// but handle the drawRect code themselves.
	this->drawRect(draw, *dstPtr, paintWithShader);
	}

	void SkBitmapDevice::drawSprite(const SkDraw& draw, const SkBitmap& bitmap,
	int x, int y, const SkPaint& paint) {
	draw.drawSprite(bitmap, x, y, paint);
	}

	void SkBitmapDevice::drawText(const SkDraw& draw, const void* text, size_t len,
	SkScalar x, SkScalar y, const SkPaint& paint) {
	draw.drawText((const char*)text, len, x, y, paint);
	}

	void SkBitmapDevice::drawPosText(const SkDraw& draw, const void* text, size_t len,
	const SkScalar xpos[], SkScalar y,
	int scalarsPerPos, const SkPaint& paint) {
	draw.drawPosText((const char*)text, len, xpos, y, scalarsPerPos, paint);
	}

	void SkBitmapDevice::drawTextOnPath(const SkDraw& draw, const void* text,
	size_t len, const SkPath& path,
	const SkMatrix* matrix,
	const SkPaint& paint) {
	draw.drawTextOnPath((const char*)text, len, path, matrix, paint);
	}

	void SkBitmapDevice::drawVertices(const SkDraw& draw, SkCanvas::VertexMode vmode,
	int vertexCount,
	const SkPoint verts[], const SkPoint textures[],
	const SkColor colors[], SkXfermode* xmode,
	const uint16_t indices[], int indexCount,
	const SkPaint& paint) {
	draw.drawVertices(vmode, vertexCount, verts, textures, colors, xmode,
	indices, indexCount, paint);
	}

	void SkBitmapDevice::drawDevice(const SkDraw& draw, SkBaseDevice* device,
	int x, int y, const SkPaint& paint) {
	const SkBitmap& src = device->accessBitmap(false);
	draw.drawSprite(src, x, y, paint);
	}

	SkSurface* SkBitmapDevice::newSurface(const SkImageInfo& info) {
	return SkSurface::NewRaster(info);
	}

	const void* SkBitmapDevice::peekPixels(SkImageInfo* info, size_t* rowBytes) {
	if (fBitmap.getPixels() && fBitmap.asImageInfo(info)) {
	if (rowBytes) {
	*rowBytes = fBitmap.rowBytes();
	}
	return fBitmap.getPixels();
	}
	return NULL;
	}

	///////////////////////////////////////////////////////////////////////////////

	bool SkBitmapDevice::filterTextFlags(const SkPaint& paint, TextFlags* flags) {
	if (!paint.isLCDRenderText() \|\| !paint.isAntiAlias()) {
	// we're cool with the paint as is
	return false;
	}

	if (SkBitmap::kARGB_8888_Config != fBitmap.config() \|\|
	paint.getRasterizer() \|\|
	paint.getPathEffect() \|\|
	paint.isFakeBoldText() \|\|
	paint.getStyle() != SkPaint::kFill_Style \|\|
	!SkXfermode::IsMode(paint.getXfermode(), SkXfermode::kSrcOver_Mode)) {
	// turn off lcd
	flags->fFlags = paint.getFlags() & ~SkPaint::kLCDRenderText_Flag;
	flags->fHinting = paint.getHinting();
	return true;
	}
	// we're cool with the paint as is
	return false;
	}