| /* |
| * 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 kN32_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)); |
| } |
| |
| 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 SkImageFilter::Context& ctx, SkBitmap* result, |
| SkIPoint* offset) { |
| return false; |
| } |
| |
| bool SkBitmapDevice::allowImageFilter(const SkImageFilter*) { |
| return true; |
| } |
| |
| 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; |
| } |
| } |
| |
| #include "SkConfig8888.h" |
| |
| static bool copy_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()) { |
| SkDstPixelInfo dstPI; |
| dstPI.fColorType = dstInfo.colorType(); |
| dstPI.fAlphaType = dstInfo.alphaType(); |
| dstPI.fPixels = dstPixels; |
| dstPI.fRowBytes = dstRowBytes; |
| |
| SkSrcPixelInfo srcPI; |
| srcPI.fColorType = srcInfo.colorType(); |
| srcPI.fAlphaType = srcInfo.alphaType(); |
| srcPI.fPixels = srcPixels; |
| srcPI.fRowBytes = srcRowBytes; |
| |
| return srcPI.convertPixelsTo(&dstPI, srcInfo.width(), srcInfo.height()); |
| } |
| 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 (copy_pixels(dstInfo, dstPixels, dstRowBytes, srcInfo, srcPixels, srcRowBytes)) { |
| fBitmap.notifyPixelsChanged(); |
| return true; |
| } |
| return false; |
| } |
| |
| bool SkBitmapDevice::onReadPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes, |
| 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 srcInfo = fBitmap.info(); |
| |
| // perhaps can relax these in the future |
| if (4 != dstInfo.bytesPerPixel()) { |
| return false; |
| } |
| if (4 != srcInfo.bytesPerPixel()) { |
| return false; |
| } |
| |
| srcInfo.fWidth = dstInfo.width(); |
| srcInfo.fHeight = dstInfo.height(); |
| |
| const void* srcPixels = fBitmap.getAddr(x, y); |
| const size_t srcRowBytes = fBitmap.rowBytes(); |
| |
| return copy_pixels(dstInfo, dstPixels, dstRowBytes, srcInfo, srcPixels, srcRowBytes); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| 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, |
| &matrix); |
| if (NULL == s) { |
| return; |
| } |
| |
| 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; |
| } |