| /* |
| * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com) |
| * Copyright (C) 2004, 2005, 2006 Apple Computer, 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 COMPUTER, INC. ``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 COMPUTER, INC. OR |
| * 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/Image.h" |
| |
| #include "platform/Length.h" |
| #include "platform/RuntimeEnabledFeatures.h" |
| #include "platform/SharedBuffer.h" |
| #include "platform/geometry/FloatPoint.h" |
| #include "platform/geometry/FloatRect.h" |
| #include "platform/geometry/FloatSize.h" |
| #include "platform/graphics/BitmapImage.h" |
| #include "platform/graphics/DeferredImageDecoder.h" |
| #include "platform/graphics/GraphicsContext.h" |
| #include "platform/graphics/paint/PaintImage.h" |
| #include "platform/graphics/paint/PaintRecorder.h" |
| #include "platform/graphics/paint/PaintShader.h" |
| #include "platform/instrumentation/PlatformInstrumentation.h" |
| #include "platform/instrumentation/tracing/TraceEvent.h" |
| #include "platform/network/mime/MIMETypeRegistry.h" |
| #include "platform/wtf/StdLibExtras.h" |
| #include "public/platform/Platform.h" |
| #include "public/platform/WebData.h" |
| #include "third_party/skia/include/core/SkImage.h" |
| |
| #include <math.h> |
| #include <tuple> |
| |
| namespace blink { |
| |
| Image::Image(ImageObserver* observer) |
| : image_observer_disabled_(false), |
| image_observer_(observer), |
| stable_image_id_(PaintImage::GetNextId()) {} |
| |
| Image::~Image() {} |
| |
| Image* Image::NullImage() { |
| DCHECK(IsMainThread()); |
| DEFINE_STATIC_REF(Image, null_image, (BitmapImage::Create())); |
| return null_image; |
| } |
| |
| PassRefPtr<Image> Image::LoadPlatformResource(const char* name) { |
| const WebData& resource = Platform::Current()->LoadResource(name); |
| if (resource.IsEmpty()) |
| return Image::NullImage(); |
| |
| RefPtr<Image> image = BitmapImage::Create(); |
| image->SetData(resource, true); |
| return image.Release(); |
| } |
| |
| bool Image::SupportsType(const String& type) { |
| return MIMETypeRegistry::IsSupportedImageResourceMIMEType(type); |
| } |
| |
| Image::SizeAvailability Image::SetData(PassRefPtr<SharedBuffer> data, |
| bool all_data_received) { |
| encoded_image_data_ = std::move(data); |
| if (!encoded_image_data_.Get()) |
| return kSizeAvailable; |
| |
| int length = encoded_image_data_->size(); |
| if (!length) |
| return kSizeAvailable; |
| |
| return DataChanged(all_data_received); |
| } |
| |
| void Image::DrawTiledBackground(GraphicsContext& ctxt, |
| const FloatRect& dest_rect, |
| const FloatPoint& src_point, |
| const FloatSize& scaled_tile_size, |
| SkBlendMode op, |
| const FloatSize& repeat_spacing) { |
| FloatSize intrinsic_tile_size(Size()); |
| if (HasRelativeSize()) { |
| intrinsic_tile_size.SetWidth(scaled_tile_size.Width()); |
| intrinsic_tile_size.SetHeight(scaled_tile_size.Height()); |
| } |
| |
| const FloatSize scale( |
| scaled_tile_size.Width() / intrinsic_tile_size.Width(), |
| scaled_tile_size.Height() / intrinsic_tile_size.Height()); |
| |
| const FloatRect one_tile_rect = ComputeTileContaining( |
| dest_rect.Location(), scaled_tile_size, src_point, repeat_spacing); |
| |
| // Check and see if a single draw of the image can cover the entire area we |
| // are supposed to tile. |
| if (one_tile_rect.Contains(dest_rect)) { |
| const FloatRect visible_src_rect = |
| ComputeSubsetForTile(one_tile_rect, dest_rect, intrinsic_tile_size); |
| ctxt.DrawImage(this, dest_rect, &visible_src_rect, op, |
| kDoNotRespectImageOrientation); |
| return; |
| } |
| |
| FloatRect tile_rect(FloatPoint(), intrinsic_tile_size); |
| DrawPattern(ctxt, tile_rect, scale, one_tile_rect.Location(), op, dest_rect, |
| repeat_spacing); |
| |
| StartAnimation(); |
| } |
| |
| void Image::DrawTiledBorder(GraphicsContext& ctxt, |
| const FloatRect& dst_rect, |
| const FloatRect& src_rect, |
| const FloatSize& provided_tile_scale_factor, |
| TileRule h_rule, |
| TileRule v_rule, |
| SkBlendMode op) { |
| // TODO(cavalcantii): see crbug.com/662513. |
| FloatSize tile_scale_factor = provided_tile_scale_factor; |
| if (v_rule == kRoundTile) { |
| float v_repetitions = std::max( |
| 1.0f, roundf(dst_rect.Height() / |
| (tile_scale_factor.Height() * src_rect.Height()))); |
| tile_scale_factor.SetHeight(dst_rect.Height() / |
| (src_rect.Height() * v_repetitions)); |
| } |
| |
| if (h_rule == kRoundTile) { |
| float h_repetitions = |
| std::max(1.0f, roundf(dst_rect.Width() / |
| (tile_scale_factor.Width() * src_rect.Width()))); |
| tile_scale_factor.SetWidth(dst_rect.Width() / |
| (src_rect.Width() * h_repetitions)); |
| } |
| |
| // We want to construct the phase such that the pattern is centered (when |
| // stretch is not set for a particular rule). |
| float v_phase = tile_scale_factor.Height() * src_rect.Y(); |
| float h_phase = tile_scale_factor.Width() * src_rect.X(); |
| if (v_rule == kRepeatTile) { |
| float scaled_tile_height = tile_scale_factor.Height() * src_rect.Height(); |
| v_phase -= (dst_rect.Height() - scaled_tile_height) / 2; |
| } |
| |
| if (h_rule == kRepeatTile) { |
| float scaled_tile_width = tile_scale_factor.Width() * src_rect.Width(); |
| h_phase -= (dst_rect.Width() - scaled_tile_width) / 2; |
| } |
| |
| FloatSize spacing; |
| auto calculate_space_needed = |
| [](const float destination, |
| const float source) -> std::tuple<bool, float> { |
| DCHECK_GT(source, 0); |
| DCHECK_GT(destination, 0); |
| |
| float repeat_tiles_count = floorf(destination / source); |
| if (!repeat_tiles_count) |
| return std::make_tuple(false, -1); |
| |
| float space = destination; |
| space -= source * repeat_tiles_count; |
| space /= repeat_tiles_count + 1.0; |
| |
| return std::make_tuple(true, space); |
| }; |
| |
| if (v_rule == kSpaceTile) { |
| std::tuple<bool, float> space = |
| calculate_space_needed(dst_rect.Height(), src_rect.Height()); |
| if (!std::get<0>(space)) |
| return; |
| |
| spacing.SetHeight(std::get<1>(space)); |
| tile_scale_factor.SetHeight(1.0); |
| v_phase = src_rect.Y(); |
| v_phase -= spacing.Height(); |
| } |
| |
| if (h_rule == kSpaceTile) { |
| std::tuple<bool, float> space = |
| calculate_space_needed(dst_rect.Width(), src_rect.Width()); |
| if (!std::get<0>(space)) |
| return; |
| |
| spacing.SetWidth(std::get<1>(space)); |
| tile_scale_factor.SetWidth(1.0); |
| h_phase = src_rect.X(); |
| h_phase -= spacing.Width(); |
| } |
| |
| FloatPoint pattern_phase(dst_rect.X() - h_phase, dst_rect.Y() - v_phase); |
| |
| // TODO(cavalcantii): see crbug.com/662507. |
| if ((h_rule == kRoundTile) || (v_rule == kRoundTile)) { |
| InterpolationQuality previous_interpolation_quality = |
| ctxt.ImageInterpolationQuality(); |
| ctxt.SetImageInterpolationQuality(kInterpolationLow); |
| DrawPattern(ctxt, src_rect, tile_scale_factor, pattern_phase, op, dst_rect); |
| ctxt.SetImageInterpolationQuality(previous_interpolation_quality); |
| } else { |
| DrawPattern(ctxt, src_rect, tile_scale_factor, pattern_phase, op, dst_rect, |
| spacing); |
| } |
| |
| StartAnimation(); |
| } |
| |
| namespace { |
| |
| sk_sp<PaintShader> CreatePatternShader(const PaintImage& image, |
| const SkMatrix& shader_matrix, |
| const PaintFlags& paint, |
| const FloatSize& spacing, |
| SkShader::TileMode tmx, |
| SkShader::TileMode tmy) { |
| if (spacing.IsZero()) |
| return MakePaintShaderImage(image.sk_image(), tmx, tmy, &shader_matrix); |
| |
| // Arbitrary tiling is currently only supported for SkPictureShader, so we use |
| // that instead of a plain bitmap shader to implement spacing. |
| const SkRect tile_rect = |
| SkRect::MakeWH(image.sk_image()->width() + spacing.Width(), |
| image.sk_image()->height() + spacing.Height()); |
| |
| PaintRecorder recorder; |
| PaintCanvas* canvas = recorder.beginRecording(tile_rect); |
| canvas->drawImage(image, 0, 0, &paint); |
| |
| return MakePaintShaderRecord(recorder.finishRecordingAsPicture(), tile_rect, |
| tmx, tmy, &shader_matrix); |
| } |
| |
| SkShader::TileMode ComputeTileMode(float left, |
| float right, |
| float min, |
| float max) { |
| DCHECK(left < right); |
| return left >= min && right <= max ? SkShader::kClamp_TileMode |
| : SkShader::kRepeat_TileMode; |
| } |
| |
| } // anonymous namespace |
| |
| void Image::DrawPattern(GraphicsContext& context, |
| const FloatRect& float_src_rect, |
| const FloatSize& scale, |
| const FloatPoint& phase, |
| SkBlendMode composite_op, |
| const FloatRect& dest_rect, |
| const FloatSize& repeat_spacing) { |
| TRACE_EVENT0("skia", "Image::drawPattern"); |
| |
| PaintImage image = PaintImageForCurrentFrame(); |
| if (!image) |
| return; |
| |
| FloatRect norm_src_rect = float_src_rect; |
| |
| norm_src_rect.Intersect( |
| FloatRect(0, 0, image.sk_image()->width(), image.sk_image()->height())); |
| if (dest_rect.IsEmpty() || norm_src_rect.IsEmpty()) |
| return; // nothing to draw |
| |
| SkMatrix local_matrix; |
| // We also need to translate it such that the origin of the pattern is the |
| // origin of the destination rect, which is what WebKit expects. Skia uses |
| // the coordinate system origin as the base for the pattern. If WebKit wants |
| // a shifted image, it will shift it from there using the localMatrix. |
| const float adjusted_x = phase.X() + norm_src_rect.X() * scale.Width(); |
| const float adjusted_y = phase.Y() + norm_src_rect.Y() * scale.Height(); |
| local_matrix.setTranslate(SkFloatToScalar(adjusted_x), |
| SkFloatToScalar(adjusted_y)); |
| |
| // Because no resizing occurred, the shader transform should be |
| // set to the pattern's transform, which just includes scale. |
| local_matrix.preScale(scale.Width(), scale.Height()); |
| |
| // Fetch this now as subsetting may swap the image. |
| auto image_id = image.sk_image()->uniqueID(); |
| |
| image = |
| PaintImage(stable_image_id_, |
| image.sk_image()->makeSubset(EnclosingIntRect(norm_src_rect)), |
| image.animation_type(), image.completion_state()); |
| if (!image) |
| return; |
| |
| const FloatSize tile_size( |
| image.sk_image()->width() * scale.Width() + repeat_spacing.Width(), |
| image.sk_image()->height() * scale.Height() + repeat_spacing.Height()); |
| const auto tmx = ComputeTileMode(dest_rect.X(), dest_rect.MaxX(), adjusted_x, |
| adjusted_x + tile_size.Width()); |
| const auto tmy = ComputeTileMode(dest_rect.Y(), dest_rect.MaxY(), adjusted_y, |
| adjusted_y + tile_size.Height()); |
| |
| PaintFlags flags = context.FillFlags(); |
| flags.setColor(SK_ColorBLACK); |
| flags.setBlendMode(composite_op); |
| flags.setFilterQuality( |
| context.ComputeFilterQuality(this, dest_rect, norm_src_rect)); |
| flags.setAntiAlias(context.ShouldAntialias()); |
| flags.setShader( |
| CreatePatternShader(image, local_matrix, flags, |
| FloatSize(repeat_spacing.Width() / scale.Width(), |
| repeat_spacing.Height() / scale.Height()), |
| tmx, tmy)); |
| // If the shader could not be instantiated (e.g. non-invertible matrix), |
| // draw transparent. |
| // Note: we can't simply bail, because of arbitrary blend mode. |
| if (!flags.getShader()) |
| flags.setColor(SK_ColorTRANSPARENT); |
| |
| context.DrawRect(dest_rect, flags); |
| |
| if (CurrentFrameIsLazyDecoded()) |
| PlatformInstrumentation::DidDrawLazyPixelRef(image_id); |
| } |
| |
| PassRefPtr<Image> Image::ImageForDefaultFrame() { |
| RefPtr<Image> image(this); |
| |
| return image.Release(); |
| } |
| |
| PaintImage Image::PaintImageForCurrentFrame() { |
| auto animation_type = MaybeAnimated() ? PaintImage::AnimationType::ANIMATED |
| : PaintImage::AnimationType::STATIC; |
| auto completion_state = CurrentFrameIsComplete() |
| ? PaintImage::CompletionState::DONE |
| : PaintImage::CompletionState::PARTIALLY_DONE; |
| return PaintImage(stable_image_id_, ImageForCurrentFrame(), animation_type, |
| completion_state); |
| } |
| |
| bool Image::ApplyShader(PaintFlags& flags, const SkMatrix& local_matrix) { |
| // Default shader impl: attempt to build a shader based on the current frame |
| // SkImage. |
| sk_sp<SkImage> image = ImageForCurrentFrame(); |
| if (!image) |
| return false; |
| |
| flags.setShader(image->makeShader(SkShader::kRepeat_TileMode, |
| SkShader::kRepeat_TileMode, &local_matrix)); |
| if (!flags.getShader()) |
| return false; |
| |
| // Animation is normally refreshed in draw() impls, which we don't call when |
| // painting via shaders. |
| StartAnimation(); |
| |
| return true; |
| } |
| |
| FloatRect Image::ComputeTileContaining(const FloatPoint& point, |
| const FloatSize& tile_size, |
| const FloatPoint& tile_phase, |
| const FloatSize& tile_spacing) { |
| const FloatSize actual_tile_size(tile_size + tile_spacing); |
| return FloatRect( |
| FloatPoint( |
| point.X() + fmodf(fmodf(-tile_phase.X(), actual_tile_size.Width()) - |
| actual_tile_size.Width(), |
| actual_tile_size.Width()), |
| point.Y() + fmodf(fmodf(-tile_phase.Y(), actual_tile_size.Height()) - |
| actual_tile_size.Height(), |
| actual_tile_size.Height())), |
| tile_size); |
| } |
| |
| FloatRect Image::ComputeSubsetForTile(const FloatRect& tile, |
| const FloatRect& dest, |
| const FloatSize& image_size) { |
| DCHECK(tile.Contains(dest)); |
| |
| const FloatSize scale(tile.Width() / image_size.Width(), |
| tile.Height() / image_size.Height()); |
| |
| FloatRect subset = dest; |
| subset.SetX((dest.X() - tile.X()) / scale.Width()); |
| subset.SetY((dest.Y() - tile.Y()) / scale.Height()); |
| subset.SetWidth(dest.Width() / scale.Width()); |
| subset.SetHeight(dest.Height() / scale.Height()); |
| |
| return subset; |
| } |
| |
| } // namespace blink |
