| // Copyright 2013 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "flutter/lib/ui/painting/canvas.h" |
| |
| #include <cmath> |
| |
| #include "flutter/display_list/dl_builder.h" |
| #include "flutter/lib/ui/floating_point.h" |
| #include "flutter/lib/ui/painting/image.h" |
| #include "flutter/lib/ui/painting/image_filter.h" |
| #include "flutter/lib/ui/painting/paint.h" |
| #include "flutter/lib/ui/ui_dart_state.h" |
| #include "flutter/lib/ui/window/platform_configuration.h" |
| |
| using tonic::ToDart; |
| |
| namespace flutter { |
| |
| IMPLEMENT_WRAPPERTYPEINFO(ui, Canvas); |
| |
| void Canvas::Create(Dart_Handle wrapper, |
| PictureRecorder* recorder, |
| double left, |
| double top, |
| double right, |
| double bottom) { |
| UIDartState::ThrowIfUIOperationsProhibited(); |
| |
| if (!recorder) { |
| Dart_ThrowException( |
| ToDart("Canvas constructor called with non-genuine PictureRecorder.")); |
| return; |
| } |
| |
| fml::RefPtr<Canvas> canvas = |
| fml::MakeRefCounted<Canvas>(recorder->BeginRecording( |
| SkRect::MakeLTRB(SafeNarrow(left), SafeNarrow(top), SafeNarrow(right), |
| SafeNarrow(bottom)))); |
| recorder->set_canvas(canvas); |
| canvas->AssociateWithDartWrapper(wrapper); |
| } |
| |
| Canvas::Canvas(sk_sp<DisplayListBuilder> builder) |
| : display_list_builder_(std::move(builder)) {} |
| |
| Canvas::~Canvas() {} |
| |
| void Canvas::save() { |
| if (display_list_builder_) { |
| builder()->Save(); |
| } |
| } |
| |
| void Canvas::saveLayerWithoutBounds(Dart_Handle paint_objects, |
| Dart_Handle paint_data) { |
| Paint paint(paint_objects, paint_data); |
| |
| FML_DCHECK(paint.isNotNull()); |
| if (display_list_builder_) { |
| DlPaint dl_paint; |
| const DlPaint* save_paint = paint.paint(dl_paint, kSaveLayerWithPaintFlags); |
| FML_DCHECK(save_paint); |
| TRACE_EVENT0("flutter", "ui.Canvas::saveLayer (Recorded)"); |
| builder()->SaveLayer(nullptr, save_paint); |
| } |
| } |
| |
| void Canvas::saveLayer(double left, |
| double top, |
| double right, |
| double bottom, |
| Dart_Handle paint_objects, |
| Dart_Handle paint_data) { |
| Paint paint(paint_objects, paint_data); |
| |
| FML_DCHECK(paint.isNotNull()); |
| SkRect bounds = SkRect::MakeLTRB(SafeNarrow(left), SafeNarrow(top), |
| SafeNarrow(right), SafeNarrow(bottom)); |
| if (display_list_builder_) { |
| DlPaint dl_paint; |
| const DlPaint* save_paint = paint.paint(dl_paint, kSaveLayerWithPaintFlags); |
| FML_DCHECK(save_paint); |
| TRACE_EVENT0("flutter", "ui.Canvas::saveLayer (Recorded)"); |
| builder()->SaveLayer(&bounds, save_paint); |
| } |
| } |
| |
| void Canvas::restore() { |
| if (display_list_builder_) { |
| builder()->Restore(); |
| } |
| } |
| |
| int Canvas::getSaveCount() { |
| if (display_list_builder_) { |
| return builder()->GetSaveCount(); |
| } else { |
| return 0; |
| } |
| } |
| |
| void Canvas::restoreToCount(int count) { |
| if (display_list_builder_ && count < getSaveCount()) { |
| builder()->RestoreToCount(count); |
| } |
| } |
| |
| void Canvas::translate(double dx, double dy) { |
| if (display_list_builder_) { |
| builder()->Translate(SafeNarrow(dx), SafeNarrow(dy)); |
| } |
| } |
| |
| void Canvas::scale(double sx, double sy) { |
| if (display_list_builder_) { |
| builder()->Scale(SafeNarrow(sx), SafeNarrow(sy)); |
| } |
| } |
| |
| void Canvas::rotate(double radians) { |
| if (display_list_builder_) { |
| builder()->Rotate(SafeNarrow(radians) * 180.0f / static_cast<float>(M_PI)); |
| } |
| } |
| |
| void Canvas::skew(double sx, double sy) { |
| if (display_list_builder_) { |
| builder()->Skew(SafeNarrow(sx), SafeNarrow(sy)); |
| } |
| } |
| |
| void Canvas::transform(const tonic::Float64List& matrix4) { |
| // The Float array stored by Dart Matrix4 is in column-major order |
| // Both DisplayList and SkM44 constructor take row-major matrix order |
| if (display_list_builder_) { |
| // clang-format off |
| builder()->TransformFullPerspective( |
| SafeNarrow(matrix4[ 0]), SafeNarrow(matrix4[ 4]), SafeNarrow(matrix4[ 8]), SafeNarrow(matrix4[12]), |
| SafeNarrow(matrix4[ 1]), SafeNarrow(matrix4[ 5]), SafeNarrow(matrix4[ 9]), SafeNarrow(matrix4[13]), |
| SafeNarrow(matrix4[ 2]), SafeNarrow(matrix4[ 6]), SafeNarrow(matrix4[10]), SafeNarrow(matrix4[14]), |
| SafeNarrow(matrix4[ 3]), SafeNarrow(matrix4[ 7]), SafeNarrow(matrix4[11]), SafeNarrow(matrix4[15])); |
| // clang-format on |
| } |
| } |
| |
| void Canvas::getTransform(Dart_Handle matrix4_handle) { |
| if (display_list_builder_) { |
| SkM44 sk_m44 = builder()->GetTransformFullPerspective(); |
| SkScalar m44_values[16]; |
| // The Float array stored by Dart Matrix4 is in column-major order |
| sk_m44.getColMajor(m44_values); |
| auto matrix4 = tonic::Float64List(matrix4_handle); |
| for (int i = 0; i < 16; i++) { |
| matrix4[i] = m44_values[i]; |
| } |
| } |
| } |
| |
| void Canvas::clipRect(double left, |
| double top, |
| double right, |
| double bottom, |
| DlCanvas::ClipOp clipOp, |
| bool doAntiAlias) { |
| if (display_list_builder_) { |
| builder()->ClipRect(SkRect::MakeLTRB(SafeNarrow(left), SafeNarrow(top), |
| SafeNarrow(right), SafeNarrow(bottom)), |
| clipOp, doAntiAlias); |
| } |
| } |
| |
| void Canvas::clipRRect(const RRect& rrect, bool doAntiAlias) { |
| if (display_list_builder_) { |
| builder()->ClipRRect(rrect.sk_rrect, DlCanvas::ClipOp::kIntersect, |
| doAntiAlias); |
| } |
| } |
| |
| void Canvas::clipPath(const CanvasPath* path, bool doAntiAlias) { |
| if (!path) { |
| Dart_ThrowException( |
| ToDart("Canvas.clipPath called with non-genuine Path.")); |
| return; |
| } |
| if (display_list_builder_) { |
| builder()->ClipPath(path->path(), DlCanvas::ClipOp::kIntersect, |
| doAntiAlias); |
| } |
| } |
| |
| void Canvas::getDestinationClipBounds(Dart_Handle rect_handle) { |
| if (display_list_builder_) { |
| auto rect = tonic::Float64List(rect_handle); |
| SkRect bounds = builder()->GetDestinationClipBounds(); |
| rect[0] = bounds.fLeft; |
| rect[1] = bounds.fTop; |
| rect[2] = bounds.fRight; |
| rect[3] = bounds.fBottom; |
| } |
| } |
| |
| void Canvas::getLocalClipBounds(Dart_Handle rect_handle) { |
| if (display_list_builder_) { |
| auto rect = tonic::Float64List(rect_handle); |
| SkRect bounds = builder()->GetLocalClipBounds(); |
| rect[0] = bounds.fLeft; |
| rect[1] = bounds.fTop; |
| rect[2] = bounds.fRight; |
| rect[3] = bounds.fBottom; |
| } |
| } |
| |
| void Canvas::drawColor(SkColor color, DlBlendMode blend_mode) { |
| if (display_list_builder_) { |
| builder()->DrawColor(DlColor(color), blend_mode); |
| } |
| } |
| |
| void Canvas::drawLine(double x1, |
| double y1, |
| double x2, |
| double y2, |
| Dart_Handle paint_objects, |
| Dart_Handle paint_data) { |
| Paint paint(paint_objects, paint_data); |
| |
| FML_DCHECK(paint.isNotNull()); |
| if (display_list_builder_) { |
| DlPaint dl_paint; |
| paint.paint(dl_paint, kDrawLineFlags); |
| builder()->DrawLine(SkPoint::Make(SafeNarrow(x1), SafeNarrow(y1)), |
| SkPoint::Make(SafeNarrow(x2), SafeNarrow(y2)), |
| dl_paint); |
| } |
| } |
| |
| void Canvas::drawPaint(Dart_Handle paint_objects, Dart_Handle paint_data) { |
| Paint paint(paint_objects, paint_data); |
| |
| FML_DCHECK(paint.isNotNull()); |
| if (display_list_builder_) { |
| DlPaint dl_paint; |
| paint.paint(dl_paint, kDrawPaintFlags); |
| std::shared_ptr<const DlImageFilter> filter = dl_paint.getImageFilter(); |
| if (filter && !filter->asColorFilter()) { |
| // drawPaint does an implicit saveLayer if an SkImageFilter is |
| // present that cannot be replaced by an SkColorFilter. |
| TRACE_EVENT0("flutter", "ui.Canvas::saveLayer (Recorded)"); |
| } |
| builder()->DrawPaint(dl_paint); |
| } |
| } |
| |
| void Canvas::drawRect(double left, |
| double top, |
| double right, |
| double bottom, |
| Dart_Handle paint_objects, |
| Dart_Handle paint_data) { |
| Paint paint(paint_objects, paint_data); |
| |
| FML_DCHECK(paint.isNotNull()); |
| if (display_list_builder_) { |
| DlPaint dl_paint; |
| paint.paint(dl_paint, kDrawRectFlags); |
| builder()->DrawRect(SkRect::MakeLTRB(SafeNarrow(left), SafeNarrow(top), |
| SafeNarrow(right), SafeNarrow(bottom)), |
| dl_paint); |
| } |
| } |
| |
| void Canvas::drawRRect(const RRect& rrect, |
| Dart_Handle paint_objects, |
| Dart_Handle paint_data) { |
| Paint paint(paint_objects, paint_data); |
| |
| FML_DCHECK(paint.isNotNull()); |
| if (display_list_builder_) { |
| DlPaint dl_paint; |
| paint.paint(dl_paint, kDrawRRectFlags); |
| builder()->DrawRRect(rrect.sk_rrect, dl_paint); |
| } |
| } |
| |
| void Canvas::drawDRRect(const RRect& outer, |
| const RRect& inner, |
| Dart_Handle paint_objects, |
| Dart_Handle paint_data) { |
| Paint paint(paint_objects, paint_data); |
| |
| FML_DCHECK(paint.isNotNull()); |
| if (display_list_builder_) { |
| DlPaint dl_paint; |
| paint.paint(dl_paint, kDrawDRRectFlags); |
| builder()->DrawDRRect(outer.sk_rrect, inner.sk_rrect, dl_paint); |
| } |
| } |
| |
| void Canvas::drawOval(double left, |
| double top, |
| double right, |
| double bottom, |
| Dart_Handle paint_objects, |
| Dart_Handle paint_data) { |
| Paint paint(paint_objects, paint_data); |
| |
| FML_DCHECK(paint.isNotNull()); |
| if (display_list_builder_) { |
| DlPaint dl_paint; |
| paint.paint(dl_paint, kDrawOvalFlags); |
| builder()->DrawOval(SkRect::MakeLTRB(SafeNarrow(left), SafeNarrow(top), |
| SafeNarrow(right), SafeNarrow(bottom)), |
| dl_paint); |
| } |
| } |
| |
| void Canvas::drawCircle(double x, |
| double y, |
| double radius, |
| Dart_Handle paint_objects, |
| Dart_Handle paint_data) { |
| Paint paint(paint_objects, paint_data); |
| |
| FML_DCHECK(paint.isNotNull()); |
| if (display_list_builder_) { |
| DlPaint dl_paint; |
| paint.paint(dl_paint, kDrawCircleFlags); |
| builder()->DrawCircle(SkPoint::Make(SafeNarrow(x), SafeNarrow(y)), |
| SafeNarrow(radius), dl_paint); |
| } |
| } |
| |
| void Canvas::drawArc(double left, |
| double top, |
| double right, |
| double bottom, |
| double startAngle, |
| double sweepAngle, |
| bool useCenter, |
| Dart_Handle paint_objects, |
| Dart_Handle paint_data) { |
| Paint paint(paint_objects, paint_data); |
| |
| FML_DCHECK(paint.isNotNull()); |
| if (display_list_builder_) { |
| DlPaint dl_paint; |
| paint.paint(dl_paint, useCenter // |
| ? kDrawArcWithCenterFlags |
| : kDrawArcNoCenterFlags); |
| builder()->DrawArc( |
| SkRect::MakeLTRB(SafeNarrow(left), SafeNarrow(top), SafeNarrow(right), |
| SafeNarrow(bottom)), |
| SafeNarrow(startAngle) * 180.0f / static_cast<float>(M_PI), |
| SafeNarrow(sweepAngle) * 180.0f / static_cast<float>(M_PI), useCenter, |
| dl_paint); |
| } |
| } |
| |
| void Canvas::drawPath(const CanvasPath* path, |
| Dart_Handle paint_objects, |
| Dart_Handle paint_data) { |
| Paint paint(paint_objects, paint_data); |
| |
| FML_DCHECK(paint.isNotNull()); |
| if (!path) { |
| Dart_ThrowException( |
| ToDart("Canvas.drawPath called with non-genuine Path.")); |
| return; |
| } |
| if (display_list_builder_) { |
| DlPaint dl_paint; |
| paint.paint(dl_paint, kDrawPathFlags); |
| builder()->DrawPath(path->path(), dl_paint); |
| } |
| } |
| |
| Dart_Handle Canvas::drawImage(const CanvasImage* image, |
| double x, |
| double y, |
| Dart_Handle paint_objects, |
| Dart_Handle paint_data, |
| int filterQualityIndex) { |
| Paint paint(paint_objects, paint_data); |
| |
| FML_DCHECK(paint.isNotNull()); |
| if (!image) { |
| return ToDart("Canvas.drawImage called with non-genuine Image."); |
| } |
| |
| auto dl_image = image->image(); |
| if (!dl_image) { |
| return Dart_Null(); |
| } |
| auto error = dl_image->get_error(); |
| if (error) { |
| return ToDart(error.value()); |
| } |
| |
| auto sampling = ImageFilter::SamplingFromIndex(filterQualityIndex); |
| if (display_list_builder_) { |
| DlPaint dl_paint; |
| const DlPaint* opt_paint = paint.paint(dl_paint, kDrawImageWithPaintFlags); |
| builder()->DrawImage(dl_image, SkPoint::Make(SafeNarrow(x), SafeNarrow(y)), |
| sampling, opt_paint); |
| } |
| return Dart_Null(); |
| } |
| |
| Dart_Handle Canvas::drawImageRect(const CanvasImage* image, |
| double src_left, |
| double src_top, |
| double src_right, |
| double src_bottom, |
| double dst_left, |
| double dst_top, |
| double dst_right, |
| double dst_bottom, |
| Dart_Handle paint_objects, |
| Dart_Handle paint_data, |
| int filterQualityIndex) { |
| Paint paint(paint_objects, paint_data); |
| |
| FML_DCHECK(paint.isNotNull()); |
| if (!image) { |
| return ToDart("Canvas.drawImageRect called with non-genuine Image."); |
| } |
| |
| auto dl_image = image->image(); |
| if (!dl_image) { |
| return Dart_Null(); |
| } |
| auto error = dl_image->get_error(); |
| if (error) { |
| return ToDart(error.value()); |
| } |
| |
| SkRect src = SkRect::MakeLTRB(SafeNarrow(src_left), SafeNarrow(src_top), |
| SafeNarrow(src_right), SafeNarrow(src_bottom)); |
| SkRect dst = SkRect::MakeLTRB(SafeNarrow(dst_left), SafeNarrow(dst_top), |
| SafeNarrow(dst_right), SafeNarrow(dst_bottom)); |
| auto sampling = ImageFilter::SamplingFromIndex(filterQualityIndex); |
| if (display_list_builder_) { |
| DlPaint dl_paint; |
| const DlPaint* opt_paint = |
| paint.paint(dl_paint, kDrawImageRectWithPaintFlags); |
| builder()->DrawImageRect(dl_image, src, dst, sampling, opt_paint, |
| DlCanvas::SrcRectConstraint::kFast); |
| } |
| return Dart_Null(); |
| } |
| |
| Dart_Handle Canvas::drawImageNine(const CanvasImage* image, |
| double center_left, |
| double center_top, |
| double center_right, |
| double center_bottom, |
| double dst_left, |
| double dst_top, |
| double dst_right, |
| double dst_bottom, |
| Dart_Handle paint_objects, |
| Dart_Handle paint_data, |
| int bitmapSamplingIndex) { |
| Paint paint(paint_objects, paint_data); |
| |
| FML_DCHECK(paint.isNotNull()); |
| if (!image) { |
| return ToDart("Canvas.drawImageNine called with non-genuine Image."); |
| } |
| auto dl_image = image->image(); |
| if (!dl_image) { |
| return Dart_Null(); |
| } |
| auto error = dl_image->get_error(); |
| if (error) { |
| return ToDart(error.value()); |
| } |
| |
| SkRect center = |
| SkRect::MakeLTRB(SafeNarrow(center_left), SafeNarrow(center_top), |
| SafeNarrow(center_right), SafeNarrow(center_bottom)); |
| SkIRect icenter; |
| center.round(&icenter); |
| SkRect dst = SkRect::MakeLTRB(SafeNarrow(dst_left), SafeNarrow(dst_top), |
| SafeNarrow(dst_right), SafeNarrow(dst_bottom)); |
| auto filter = ImageFilter::FilterModeFromIndex(bitmapSamplingIndex); |
| if (display_list_builder_) { |
| DlPaint dl_paint; |
| const DlPaint* opt_paint = |
| paint.paint(dl_paint, kDrawImageNineWithPaintFlags); |
| builder()->DrawImageNine(dl_image, icenter, dst, filter, opt_paint); |
| } |
| return Dart_Null(); |
| } |
| |
| void Canvas::drawPicture(Picture* picture) { |
| if (!picture) { |
| Dart_ThrowException( |
| ToDart("Canvas.drawPicture called with non-genuine Picture.")); |
| return; |
| } |
| if (picture->display_list()) { |
| if (display_list_builder_) { |
| builder()->DrawDisplayList(picture->display_list()); |
| } |
| } else { |
| FML_DCHECK(false); |
| } |
| } |
| |
| void Canvas::drawPoints(Dart_Handle paint_objects, |
| Dart_Handle paint_data, |
| DlCanvas::PointMode point_mode, |
| const tonic::Float32List& points) { |
| Paint paint(paint_objects, paint_data); |
| |
| static_assert(sizeof(SkPoint) == sizeof(float) * 2, |
| "SkPoint doesn't use floats."); |
| |
| FML_DCHECK(paint.isNotNull()); |
| if (display_list_builder_) { |
| DlPaint dl_paint; |
| switch (point_mode) { |
| case DlCanvas::PointMode::kPoints: |
| paint.paint(dl_paint, kDrawPointsAsPointsFlags); |
| break; |
| case DlCanvas::PointMode::kLines: |
| paint.paint(dl_paint, kDrawPointsAsLinesFlags); |
| break; |
| case DlCanvas::PointMode::kPolygon: |
| paint.paint(dl_paint, kDrawPointsAsPolygonFlags); |
| break; |
| } |
| builder()->DrawPoints(point_mode, |
| points.num_elements() / 2, // SkPoints have 2 floats |
| reinterpret_cast<const SkPoint*>(points.data()), |
| dl_paint); |
| } |
| } |
| |
| void Canvas::drawVertices(const Vertices* vertices, |
| DlBlendMode blend_mode, |
| Dart_Handle paint_objects, |
| Dart_Handle paint_data) { |
| Paint paint(paint_objects, paint_data); |
| |
| if (!vertices) { |
| Dart_ThrowException( |
| ToDart("Canvas.drawVertices called with non-genuine Vertices.")); |
| return; |
| } |
| FML_DCHECK(paint.isNotNull()); |
| if (display_list_builder_) { |
| DlPaint dl_paint; |
| paint.paint(dl_paint, kDrawVerticesFlags); |
| builder()->DrawVertices(vertices->vertices(), blend_mode, dl_paint); |
| } |
| } |
| |
| Dart_Handle Canvas::drawAtlas(Dart_Handle paint_objects, |
| Dart_Handle paint_data, |
| int filterQualityIndex, |
| CanvasImage* atlas, |
| Dart_Handle transforms_handle, |
| Dart_Handle rects_handle, |
| Dart_Handle colors_handle, |
| DlBlendMode blend_mode, |
| Dart_Handle cull_rect_handle) { |
| Paint paint(paint_objects, paint_data); |
| |
| if (!atlas) { |
| return ToDart( |
| "Canvas.drawAtlas or Canvas.drawRawAtlas called with " |
| "non-genuine Image."); |
| } |
| |
| auto dl_image = atlas->image(); |
| auto error = dl_image->get_error(); |
| if (error) { |
| return ToDart(error.value()); |
| } |
| |
| static_assert(sizeof(SkRSXform) == sizeof(float) * 4, |
| "SkRSXform doesn't use floats."); |
| static_assert(sizeof(SkRect) == sizeof(float) * 4, |
| "SkRect doesn't use floats."); |
| |
| auto sampling = ImageFilter::SamplingFromIndex(filterQualityIndex); |
| |
| FML_DCHECK(paint.isNotNull()); |
| if (display_list_builder_) { |
| tonic::Float32List transforms(transforms_handle); |
| tonic::Float32List rects(rects_handle); |
| tonic::Int32List colors(colors_handle); |
| tonic::Float32List cull_rect(cull_rect_handle); |
| |
| DlPaint dl_paint; |
| const DlPaint* opt_paint = paint.paint(dl_paint, kDrawAtlasWithPaintFlags); |
| builder()->DrawAtlas( |
| dl_image, reinterpret_cast<const SkRSXform*>(transforms.data()), |
| reinterpret_cast<const SkRect*>(rects.data()), |
| reinterpret_cast<const DlColor*>(colors.data()), |
| rects.num_elements() / 4, // SkRect have four floats. |
| blend_mode, sampling, reinterpret_cast<const SkRect*>(cull_rect.data()), |
| opt_paint); |
| } |
| return Dart_Null(); |
| } |
| |
| void Canvas::drawShadow(const CanvasPath* path, |
| SkColor color, |
| double elevation, |
| bool transparentOccluder) { |
| if (!path) { |
| Dart_ThrowException( |
| ToDart("Canvas.drawShader called with non-genuine Path.")); |
| return; |
| } |
| |
| // Not using SafeNarrow because DPR will always be a relatively small number. |
| const ViewportMetrics* metrics = |
| UIDartState::Current()->platform_configuration()->GetMetrics(0); |
| SkScalar dpr; |
| // TODO(dkwingsmt): We should support rendering shadows on non-implicit views. |
| // However, currently this method has no way to get the target view ID. |
| if (metrics == nullptr) { |
| dpr = 1.0f; |
| } else { |
| dpr = static_cast<float>(metrics->device_pixel_ratio); |
| } |
| if (display_list_builder_) { |
| // The DrawShadow mechanism results in non-public operations to be |
| // performed on the canvas involving an SkDrawShadowRec. Since we |
| // cannot include the header that defines that structure, we cannot |
| // record an operation that it injects into an SkCanvas. To prevent |
| // that situation we bypass the canvas interface and inject the |
| // shadow parameters directly into the underlying DisplayList. |
| // See: https://bugs.chromium.org/p/skia/issues/detail?id=12125 |
| builder()->DrawShadow(path->path(), DlColor(color), SafeNarrow(elevation), |
| transparentOccluder, dpr); |
| } |
| } |
| |
| void Canvas::Invalidate() { |
| display_list_builder_ = nullptr; |
| if (dart_wrapper()) { |
| ClearDartWrapper(); |
| } |
| } |
| |
| } // namespace flutter |
