| /* |
| * 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 "SkRectShaderImageFilter.h" |
| #include "SkBitmap.h" |
| #include "SkCanvas.h" |
| #include "SkDevice.h" |
| #include "SkReadBuffer.h" |
| #include "SkWriteBuffer.h" |
| #include "SkShader.h" |
| |
| SkRectShaderImageFilter* SkRectShaderImageFilter::Create(SkShader* s, const SkRect& rect) { |
| SkASSERT(s); |
| uint32_t flags = CropRect::kHasAll_CropEdge; |
| if (rect.width() == 0 || rect.height() == 0) { |
| flags = 0x0; |
| } |
| CropRect cropRect(rect, flags); |
| return SkNEW_ARGS(SkRectShaderImageFilter, (s, &cropRect)); |
| } |
| |
| SkRectShaderImageFilter* SkRectShaderImageFilter::Create(SkShader* s, const CropRect* cropRect) { |
| SkASSERT(s); |
| return SkNEW_ARGS(SkRectShaderImageFilter, (s, cropRect)); |
| } |
| |
| SkRectShaderImageFilter::SkRectShaderImageFilter(SkShader* s, const CropRect* cropRect) |
| : INHERITED(NULL, cropRect) |
| , fShader(s) { |
| SkASSERT(s); |
| s->ref(); |
| } |
| |
| SkRectShaderImageFilter::SkRectShaderImageFilter(SkReadBuffer& buffer) |
| : INHERITED(1, buffer) { |
| fShader = buffer.readShader(); |
| } |
| |
| void SkRectShaderImageFilter::flatten(SkWriteBuffer& buffer) const { |
| this->INHERITED::flatten(buffer); |
| |
| buffer.writeFlattenable(fShader); |
| } |
| |
| SkRectShaderImageFilter::~SkRectShaderImageFilter() { |
| SkSafeUnref(fShader); |
| } |
| |
| bool SkRectShaderImageFilter::onFilterImage(Proxy* proxy, |
| const SkBitmap& source, |
| const Context& ctx, |
| SkBitmap* result, |
| SkIPoint* offset) const { |
| SkIRect bounds; |
| if (!this->applyCropRect(ctx, source, SkIPoint::Make(0, 0), &bounds)) { |
| return false; |
| } |
| |
| SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), |
| bounds.height())); |
| if (NULL == device.get()) { |
| return false; |
| } |
| SkCanvas canvas(device.get()); |
| |
| SkPaint paint; |
| SkMatrix matrix(ctx.ctm()); |
| matrix.postTranslate(SkIntToScalar(-bounds.left()), SkIntToScalar(-bounds.top())); |
| paint.setShader(SkShader::CreateLocalMatrixShader(fShader, matrix))->unref(); |
| |
| SkRect rect = SkRect::MakeWH(SkIntToScalar(bounds.width()), SkIntToScalar(bounds.height())); |
| canvas.drawRect(rect, paint); |
| |
| *result = device.get()->accessBitmap(false); |
| offset->fX = bounds.fLeft; |
| offset->fY = bounds.fTop; |
| return true; |
| } |