| /* |
| * Copyright (C) 2012 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "platform/graphics/filters/SkiaImageFilterBuilder.h" |
| |
| #include "SkBlurImageFilter.h" |
| #include "SkColorFilterImageFilter.h" |
| #include "SkColorMatrixFilter.h" |
| #include "SkTableColorFilter.h" |
| #include "platform/graphics/BoxReflection.h" |
| #include "platform/graphics/filters/FilterEffect.h" |
| #include "platform/graphics/paint/PaintCanvas.h" |
| #include "platform/graphics/paint/PaintRecord.h" |
| #include "platform/graphics/skia/SkiaUtils.h" |
| #include "third_party/skia/include/effects/SkImageSource.h" |
| #include "third_party/skia/include/effects/SkOffsetImageFilter.h" |
| #include "third_party/skia/include/effects/SkPictureImageFilter.h" |
| #include "third_party/skia/include/effects/SkXfermodeImageFilter.h" |
| |
| namespace blink { |
| namespace SkiaImageFilterBuilder { |
| |
| void PopulateSourceGraphicImageFilters( |
| FilterEffect* source_graphic, |
| sk_sp<SkImageFilter> input, |
| InterpolationSpace input_interpolation_space) { |
| // Prepopulate SourceGraphic with two image filters: one with a null image |
| // filter, and the other with a colorspace conversion filter. |
| // We don't know what color space the interior nodes will request, so we |
| // have to initialize SourceGraphic with both options. |
| // Since we know SourceGraphic is always PM-valid, we also use these for |
| // the PM-validated options. |
| sk_sp<SkImageFilter> device_filter = TransformInterpolationSpace( |
| input, input_interpolation_space, kInterpolationSpaceSRGB); |
| sk_sp<SkImageFilter> linear_filter = TransformInterpolationSpace( |
| input, input_interpolation_space, kInterpolationSpaceLinear); |
| source_graphic->SetImageFilter(kInterpolationSpaceSRGB, false, device_filter); |
| source_graphic->SetImageFilter(kInterpolationSpaceLinear, false, |
| linear_filter); |
| source_graphic->SetImageFilter(kInterpolationSpaceSRGB, true, device_filter); |
| source_graphic->SetImageFilter(kInterpolationSpaceLinear, true, |
| linear_filter); |
| } |
| |
| sk_sp<SkImageFilter> Build( |
| FilterEffect* effect, |
| InterpolationSpace interpolation_space, |
| bool destination_requires_valid_pre_multiplied_pixels) { |
| if (!effect) |
| return nullptr; |
| |
| bool requires_pm_color_validation = |
| effect->MayProduceInvalidPreMultipliedPixels() && |
| destination_requires_valid_pre_multiplied_pixels; |
| |
| if (SkImageFilter* filter = effect->GetImageFilter( |
| interpolation_space, requires_pm_color_validation)) |
| return sk_ref_sp(filter); |
| |
| // Note that we may still need the color transform even if the filter is null |
| sk_sp<SkImageFilter> orig_filter = |
| requires_pm_color_validation |
| ? effect->CreateImageFilter() |
| : effect->CreateImageFilterWithoutValidation(); |
| sk_sp<SkImageFilter> filter = TransformInterpolationSpace( |
| orig_filter, effect->OperatingInterpolationSpace(), interpolation_space); |
| effect->SetImageFilter(interpolation_space, requires_pm_color_validation, |
| filter); |
| if (filter.get() != orig_filter.get()) |
| effect->SetImageFilter(effect->OperatingInterpolationSpace(), |
| requires_pm_color_validation, |
| std::move(orig_filter)); |
| return filter; |
| } |
| |
| sk_sp<SkImageFilter> TransformInterpolationSpace( |
| sk_sp<SkImageFilter> input, |
| InterpolationSpace src_interpolation_space, |
| InterpolationSpace dst_interpolation_space) { |
| sk_sp<SkColorFilter> color_filter = |
| InterpolationSpaceUtilities::CreateInterpolationSpaceFilter( |
| src_interpolation_space, dst_interpolation_space); |
| if (!color_filter) |
| return input; |
| |
| return SkColorFilterImageFilter::Make(std::move(color_filter), |
| std::move(input)); |
| } |
| |
| void BuildSourceGraphic(FilterEffect* source_graphic, |
| sk_sp<PaintRecord> record, |
| const FloatRect& record_bounds) { |
| DCHECK(record); |
| sk_sp<SkImageFilter> filter = |
| SkPictureImageFilter::Make(ToSkPicture(record, record_bounds)); |
| PopulateSourceGraphicImageFilters( |
| source_graphic, std::move(filter), |
| source_graphic->OperatingInterpolationSpace()); |
| } |
| |
| static const float kMaxMaskBufferSize = |
| 50.f * 1024.f * 1024.f / 4.f; // 50MB / 4 bytes per pixel |
| |
| sk_sp<SkImageFilter> BuildBoxReflectFilter(const BoxReflection& reflection, |
| sk_sp<SkImageFilter> input) { |
| sk_sp<SkImageFilter> masked_input; |
| if (sk_sp<PaintRecord> mask_record = reflection.Mask()) { |
| // Since PaintRecords can't be serialized to the browser process, first |
| // raster the mask to a bitmap, then encode it in an SkImageSource, which |
| // can be serialized. |
| SkBitmap bitmap; |
| const SkRect mask_record_bounds = reflection.MaskBounds(); |
| if (mask_record_bounds.width() * mask_record_bounds.height() < |
| kMaxMaskBufferSize) { |
| bitmap.allocPixels(SkImageInfo::MakeN32Premul( |
| mask_record_bounds.width(), mask_record_bounds.height())); |
| SkiaPaintCanvas canvas(bitmap); |
| canvas.clear(SK_ColorTRANSPARENT); |
| canvas.translate(-mask_record_bounds.x(), -mask_record_bounds.y()); |
| canvas.drawPicture(mask_record); |
| sk_sp<SkImage> image = SkImage::MakeFromBitmap(bitmap); |
| |
| // SkXfermodeImageFilter can choose an excessively large size if the |
| // mask is smaller than the filtered contents (due to overflow). |
| // http://skbug.com/5210 |
| SkImageFilter::CropRect crop_rect(mask_record_bounds); |
| masked_input = SkXfermodeImageFilter::Make( |
| SkBlendMode::kSrcIn, |
| SkOffsetImageFilter::Make(mask_record_bounds.x(), |
| mask_record_bounds.y(), |
| SkImageSource::Make(image)), |
| input, &crop_rect); |
| } else { |
| // If the buffer is excessively big, give up and make an |
| // SkPictureImageFilter anyway, even if it might not render. |
| SkImageFilter::CropRect crop_rect(mask_record_bounds); |
| masked_input = SkXfermodeImageFilter::Make( |
| SkBlendMode::kSrcOver, |
| SkPictureImageFilter::Make( |
| ToSkPicture(std::move(mask_record), mask_record_bounds)), |
| input, &crop_rect); |
| } |
| } else { |
| masked_input = input; |
| } |
| sk_sp<SkImageFilter> flip_image_filter = SkImageFilter::MakeMatrixFilter( |
| reflection.ReflectionMatrix(), kLow_SkFilterQuality, |
| std::move(masked_input)); |
| return SkXfermodeImageFilter::Make(SkBlendMode::kSrcOver, |
| std::move(flip_image_filter), |
| std::move(input), nullptr); |
| } |
| |
| } // namespace SkiaImageFilterBuilder |
| } // namespace blink |
