| /* libs/graphics/sgl/SkColorFilter.cpp |
| ** |
| ** Copyright 2006, The Android Open Source Project |
| ** |
| ** Licensed under the Apache License, Version 2.0 (the "License"); |
| ** you may not use this file except in compliance with the License. |
| ** You may obtain a copy of the License at |
| ** |
| ** http://www.apache.org/licenses/LICENSE-2.0 |
| ** |
| ** Unless required by applicable law or agreed to in writing, software |
| ** distributed under the License is distributed on an "AS IS" BASIS, |
| ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| ** See the License for the specific language governing permissions and |
| ** limitations under the License. |
| */ |
| |
| #include "SkColorFilter.h" |
| #include "SkShader.h" |
| #include "SkUnPreMultiply.h" |
| |
| bool SkColorFilter::asColorMode(SkColor* color, SkXfermode::Mode* mode) { |
| return false; |
| } |
| |
| void SkColorFilter::filterSpan16(const uint16_t s[], int count, uint16_t d[]) { |
| SkASSERT(this->getFlags() & SkColorFilter::kHasFilter16_Flag); |
| SkASSERT(!"missing implementation of SkColorFilter::filterSpan16"); |
| |
| if (d != s) { |
| memcpy(d, s, count * sizeof(uint16_t)); |
| } |
| } |
| |
| SkColor SkColorFilter::filterColor(SkColor c) { |
| SkPMColor dst, src = SkPreMultiplyColor(c); |
| this->filterSpan(&src, 1, &dst); |
| return SkUnPreMultiply::PMColorToColor(dst); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkFilterShader::SkFilterShader(SkShader* shader, SkColorFilter* filter) { |
| fShader = shader; shader->ref(); |
| fFilter = filter; filter->ref(); |
| } |
| |
| SkFilterShader::SkFilterShader(SkFlattenableReadBuffer& buffer) : |
| INHERITED(buffer) { |
| fShader = static_cast<SkShader*>(buffer.readFlattenable()); |
| fFilter = static_cast<SkColorFilter*>(buffer.readFlattenable()); |
| } |
| |
| SkFilterShader::~SkFilterShader() { |
| fFilter->unref(); |
| fShader->unref(); |
| } |
| |
| void SkFilterShader::beginSession() { |
| this->INHERITED::beginSession(); |
| fShader->beginSession(); |
| } |
| |
| void SkFilterShader::endSession() { |
| fShader->endSession(); |
| this->INHERITED::endSession(); |
| } |
| |
| void SkFilterShader::flatten(SkFlattenableWriteBuffer& buffer) { |
| this->INHERITED::flatten(buffer); |
| buffer.writeFlattenable(fShader); |
| buffer.writeFlattenable(fFilter); |
| } |
| |
| uint32_t SkFilterShader::getFlags() { |
| uint32_t shaderF = fShader->getFlags(); |
| uint32_t filterF = fFilter->getFlags(); |
| |
| // if the filter doesn't support 16bit, clear the matching bit in the shader |
| if (!(filterF & SkColorFilter::kHasFilter16_Flag)) { |
| shaderF &= ~SkShader::kHasSpan16_Flag; |
| } |
| // if the filter might change alpha, clear the opaque flag in the shader |
| if (!(filterF & SkColorFilter::kAlphaUnchanged_Flag)) { |
| shaderF &= ~(SkShader::kOpaqueAlpha_Flag | SkShader::kHasSpan16_Flag); |
| } |
| return shaderF; |
| } |
| |
| bool SkFilterShader::setContext(const SkBitmap& device, |
| const SkPaint& paint, |
| const SkMatrix& matrix) { |
| return this->INHERITED::setContext(device, paint, matrix) && |
| fShader->setContext(device, paint, matrix); |
| } |
| |
| void SkFilterShader::shadeSpan(int x, int y, SkPMColor result[], int count) { |
| fShader->shadeSpan(x, y, result, count); |
| fFilter->filterSpan(result, count, result); |
| } |
| |
| void SkFilterShader::shadeSpan16(int x, int y, uint16_t result[], int count) { |
| SkASSERT(fShader->getFlags() & SkShader::kHasSpan16_Flag); |
| SkASSERT(fFilter->getFlags() & SkColorFilter::kHasFilter16_Flag); |
| |
| fShader->shadeSpan16(x, y, result, count); |
| fFilter->filterSpan16(result, count, result); |
| } |
| |