| // Copyright 2015 The Chromium 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 "ui/gfx/paint_vector_icon.h" |
| |
| #include <map> |
| |
| #include "base/lazy_instance.h" |
| #include "base/strings/string_number_conversions.h" |
| #include "base/strings/string_split.h" |
| #include "third_party/skia/include/core/SkPath.h" |
| #include "ui/gfx/canvas.h" |
| #include "ui/gfx/image/canvas_image_source.h" |
| #include "ui/gfx/vector_icon_types.h" |
| #include "ui/gfx/vector_icons2.h" |
| |
| namespace gfx { |
| |
| namespace { |
| |
| // Translates a string such as "MOVE_TO" into a command such as MOVE_TO. |
| CommandType CommandFromString(const std::string& source) { |
| #define RETURN_IF_IS(command) \ |
| if (source == #command) \ |
| return command; |
| |
| RETURN_IF_IS(NEW_PATH); |
| RETURN_IF_IS(PATH_COLOR_ARGB); |
| RETURN_IF_IS(STROKE); |
| RETURN_IF_IS(MOVE_TO); |
| RETURN_IF_IS(R_MOVE_TO); |
| RETURN_IF_IS(LINE_TO); |
| RETURN_IF_IS(R_LINE_TO); |
| RETURN_IF_IS(H_LINE_TO); |
| RETURN_IF_IS(R_H_LINE_TO); |
| RETURN_IF_IS(V_LINE_TO); |
| RETURN_IF_IS(R_V_LINE_TO); |
| RETURN_IF_IS(CUBIC_TO); |
| RETURN_IF_IS(R_CUBIC_TO); |
| RETURN_IF_IS(CIRCLE); |
| RETURN_IF_IS(CLOSE); |
| RETURN_IF_IS(CANVAS_DIMENSIONS); |
| RETURN_IF_IS(CLIP); |
| RETURN_IF_IS(DISABLE_AA); |
| RETURN_IF_IS(END); |
| #undef RETURN_IF_IS |
| |
| NOTREACHED(); |
| return CLOSE; |
| } |
| |
| std::vector<PathElement> PathFromSource(const std::string& source) { |
| std::vector<PathElement> path; |
| std::vector<std::string> pieces = base::SplitString( |
| source, "\n ,f", base::TRIM_WHITESPACE, base::SPLIT_WANT_NONEMPTY); |
| for (const auto& piece : pieces) { |
| double value; |
| if (base::StringToDouble(piece, &value)) |
| path.push_back(PathElement(SkDoubleToScalar(value))); |
| else |
| path.push_back(PathElement(CommandFromString(piece))); |
| } |
| return path; |
| } |
| |
| void PaintPath(Canvas* canvas, |
| const PathElement* path_elements, |
| size_t dip_size, |
| SkColor color) { |
| SkPath path; |
| path.setFillType(SkPath::kEvenOdd_FillType); |
| |
| size_t canvas_size = kReferenceSizeDip; |
| std::vector<SkPath> paths; |
| std::vector<SkPaint> paints; |
| SkRect clip_rect = SkRect::MakeEmpty(); |
| |
| for (size_t i = 0; path_elements[i].type != END; i++) { |
| if (paths.empty() || path_elements[i].type == NEW_PATH) { |
| paths.push_back(SkPath()); |
| paths.back().setFillType(SkPath::kEvenOdd_FillType); |
| |
| paints.push_back(SkPaint()); |
| paints.back().setColor(color); |
| paints.back().setAntiAlias(true); |
| paints.back().setStrokeCap(SkPaint::kRound_Cap); |
| } |
| |
| SkPath& path = paths.back(); |
| SkPaint& paint = paints.back(); |
| switch (path_elements[i].type) { |
| // Handled above. |
| case NEW_PATH: |
| continue; |
| |
| case PATH_COLOR_ARGB: { |
| int a = SkScalarFloorToInt(path_elements[++i].arg); |
| int r = SkScalarFloorToInt(path_elements[++i].arg); |
| int g = SkScalarFloorToInt(path_elements[++i].arg); |
| int b = SkScalarFloorToInt(path_elements[++i].arg); |
| paint.setColor(SkColorSetARGB(a, r, g, b)); |
| break; |
| } |
| |
| case STROKE: { |
| paint.setStyle(SkPaint::kStroke_Style); |
| SkScalar width = path_elements[++i].arg; |
| paint.setStrokeWidth(width); |
| break; |
| } |
| |
| case MOVE_TO: { |
| SkScalar x = path_elements[++i].arg; |
| SkScalar y = path_elements[++i].arg; |
| path.moveTo(x, y); |
| break; |
| } |
| |
| case R_MOVE_TO: { |
| SkScalar x = path_elements[++i].arg; |
| SkScalar y = path_elements[++i].arg; |
| path.rMoveTo(x, y); |
| break; |
| } |
| |
| case LINE_TO: { |
| SkScalar x = path_elements[++i].arg; |
| SkScalar y = path_elements[++i].arg; |
| path.lineTo(x, y); |
| break; |
| } |
| |
| case R_LINE_TO: { |
| SkScalar x = path_elements[++i].arg; |
| SkScalar y = path_elements[++i].arg; |
| path.rLineTo(x, y); |
| break; |
| } |
| |
| case H_LINE_TO: { |
| SkPoint last_point; |
| path.getLastPt(&last_point); |
| SkScalar x = path_elements[++i].arg; |
| path.lineTo(x, last_point.fY); |
| break; |
| } |
| |
| case R_H_LINE_TO: { |
| SkScalar x = path_elements[++i].arg; |
| path.rLineTo(x, 0); |
| break; |
| } |
| |
| case V_LINE_TO: { |
| SkPoint last_point; |
| path.getLastPt(&last_point); |
| SkScalar y = path_elements[++i].arg; |
| path.lineTo(last_point.fX, y); |
| break; |
| } |
| |
| case R_V_LINE_TO: { |
| SkScalar y = path_elements[++i].arg; |
| path.rLineTo(0, y); |
| break; |
| } |
| |
| case CUBIC_TO: { |
| SkScalar x1 = path_elements[++i].arg; |
| SkScalar y1 = path_elements[++i].arg; |
| SkScalar x2 = path_elements[++i].arg; |
| SkScalar y2 = path_elements[++i].arg; |
| SkScalar x3 = path_elements[++i].arg; |
| SkScalar y3 = path_elements[++i].arg; |
| path.cubicTo(x1, y1, x2, y2, x3, y3); |
| break; |
| } |
| |
| case R_CUBIC_TO: { |
| SkScalar x1 = path_elements[++i].arg; |
| SkScalar y1 = path_elements[++i].arg; |
| SkScalar x2 = path_elements[++i].arg; |
| SkScalar y2 = path_elements[++i].arg; |
| SkScalar x3 = path_elements[++i].arg; |
| SkScalar y3 = path_elements[++i].arg; |
| path.rCubicTo(x1, y1, x2, y2, x3, y3); |
| break; |
| } |
| |
| case CIRCLE: { |
| SkScalar x = path_elements[++i].arg; |
| SkScalar y = path_elements[++i].arg; |
| SkScalar r = path_elements[++i].arg; |
| path.addCircle(x, y, r); |
| break; |
| } |
| |
| case CLOSE: { |
| path.close(); |
| break; |
| } |
| |
| case CANVAS_DIMENSIONS: { |
| SkScalar width = path_elements[++i].arg; |
| canvas_size = SkScalarTruncToInt(width); |
| break; |
| } |
| |
| case CLIP: { |
| SkScalar x = path_elements[++i].arg; |
| SkScalar y = path_elements[++i].arg; |
| SkScalar w = path_elements[++i].arg; |
| SkScalar h = path_elements[++i].arg; |
| clip_rect = SkRect::MakeXYWH(x, y, w, h); |
| break; |
| } |
| |
| case DISABLE_AA: { |
| paint.setAntiAlias(false); |
| break; |
| } |
| |
| case END: |
| NOTREACHED(); |
| break; |
| } |
| } |
| |
| if (dip_size != canvas_size) { |
| SkScalar scale = SkIntToScalar(dip_size) / SkIntToScalar(canvas_size); |
| canvas->sk_canvas()->scale(scale, scale); |
| } |
| |
| if (!clip_rect.isEmpty()) |
| canvas->sk_canvas()->clipRect(clip_rect); |
| |
| DCHECK_EQ(paints.size(), paths.size()); |
| for (size_t i = 0; i < paths.size(); ++i) |
| canvas->DrawPath(paths[i], paints[i]); |
| } |
| |
| class VectorIconSource : public CanvasImageSource { |
| public: |
| VectorIconSource(VectorIconId id, size_t dip_size, SkColor color) |
| : CanvasImageSource( |
| gfx::Size(static_cast<int>(dip_size), static_cast<int>(dip_size)), |
| false), |
| id_(id), |
| color_(color) {} |
| |
| VectorIconSource(const std::string& definition, |
| size_t dip_size, |
| SkColor color) |
| : CanvasImageSource( |
| gfx::Size(static_cast<int>(dip_size), static_cast<int>(dip_size)), |
| false), |
| id_(VectorIconId::VECTOR_ICON_NONE), |
| path_(PathFromSource(definition)), |
| color_(color) {} |
| |
| ~VectorIconSource() override {} |
| |
| // CanvasImageSource: |
| void Draw(gfx::Canvas* canvas) override { |
| if (path_.empty()) |
| PaintVectorIcon(canvas, id_, size_.width(), color_); |
| else |
| PaintPath(canvas, path_.data(), size_.width(), color_); |
| } |
| |
| private: |
| const VectorIconId id_; |
| const std::vector<PathElement> path_; |
| const SkColor color_; |
| |
| DISALLOW_COPY_AND_ASSIGN(VectorIconSource); |
| }; |
| |
| // This class caches vector icons (as ImageSkia) so they don't have to be drawn |
| // more than once. This also guarantees the backing data for the images returned |
| // by CreateVectorIcon will persist in memory until program termination. |
| class VectorIconCache { |
| public: |
| VectorIconCache() {} |
| ~VectorIconCache() {} |
| |
| ImageSkia GetOrCreateIcon(VectorIconId id, size_t dip_size, SkColor color) { |
| IconDescription description(id, dip_size, color); |
| auto iter = images_.find(description); |
| if (iter != images_.end()) |
| return iter->second; |
| |
| ImageSkia icon( |
| new VectorIconSource(id, dip_size, color), |
| gfx::Size(static_cast<int>(dip_size), static_cast<int>(dip_size))); |
| images_.insert(std::make_pair(description, icon)); |
| return icon; |
| } |
| |
| private: |
| struct IconDescription { |
| IconDescription(VectorIconId id, size_t dip_size, SkColor color) |
| : id(id), dip_size(dip_size), color(color) {} |
| |
| bool operator<(const IconDescription& other) const { |
| if (id != other.id) |
| return id < other.id; |
| if (dip_size != other.dip_size) |
| return dip_size < other.dip_size; |
| return color < other.color; |
| } |
| |
| VectorIconId id; |
| size_t dip_size; |
| SkColor color; |
| }; |
| |
| std::map<IconDescription, ImageSkia> images_; |
| |
| DISALLOW_COPY_AND_ASSIGN(VectorIconCache); |
| }; |
| |
| static base::LazyInstance<VectorIconCache> g_icon_cache = |
| LAZY_INSTANCE_INITIALIZER; |
| |
| } // namespace |
| |
| void PaintVectorIcon(Canvas* canvas, |
| VectorIconId id, |
| size_t dip_size, |
| SkColor color) { |
| DCHECK(VectorIconId::VECTOR_ICON_NONE != id); |
| const PathElement* path = canvas->image_scale() == 1.f |
| ? GetPathForVectorIconAt1xScale(id) |
| : GetPathForVectorIcon(id); |
| PaintPath(canvas, path, dip_size, color); |
| } |
| |
| ImageSkia CreateVectorIcon(VectorIconId id, size_t dip_size, SkColor color) { |
| return g_icon_cache.Get().GetOrCreateIcon(id, dip_size, color); |
| } |
| |
| ImageSkia CreateVectorIconFromSource(const std::string& source, |
| size_t dip_size, |
| SkColor color) { |
| return ImageSkia( |
| new VectorIconSource(source, dip_size, color), |
| gfx::Size(static_cast<int>(dip_size), static_cast<int>(dip_size))); |
| } |
| |
| } // namespace gfx |