/* * Copyright (C) 2006, 2008 Apple Inc. All rights reserved. * Copyright (C) 2008, 2010 Nokia Corporation and/or its subsidiary(-ies) * Copyright (C) 2007 Alp Toker * Copyright (C) 2008 Eric Seidel * * 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 "third_party/blink/renderer/modules/canvas/canvas2d/canvas_style.h" #include "base/notreached.h" #include "cc/paint/paint_flags.h" #include "third_party/blink/public/mojom/frame/color_scheme.mojom-blink.h" #include "third_party/blink/renderer/core/css/css_color_mix_value.h" #include "third_party/blink/renderer/core/css/css_property_names.h" #include "third_party/blink/renderer/core/css/parser/css_parser.h" #include "third_party/blink/renderer/core/css/parser/css_parser_context.h" #include "third_party/blink/renderer/core/css/parser/css_parser_token_stream.h" #include "third_party/blink/renderer/core/css/properties/css_parsing_utils.h" #include "third_party/blink/renderer/core/css/resolver/style_builder_converter.h" #include "third_party/blink/renderer/core/css/style_color.h" #include "third_party/blink/renderer/core/dom/text_link_colors.h" #include "third_party/blink/renderer/core/execution_context/security_context.h" #include "third_party/blink/renderer/core/html/parser/html_parser_idioms.h" #include "third_party/blink/renderer/modules/canvas/canvas2d/canvas_gradient.h" #include "third_party/blink/renderer/modules/canvas/canvas2d/canvas_pattern.h" #include "third_party/blink/renderer/platform/graphics/gradient.h" #include "third_party/blink/renderer/platform/graphics/graphics_context.h" #include "third_party/blink/renderer/platform/graphics/pattern.h" #include "third_party/blink/renderer/platform/graphics/skia/skia_utils.h" #include "third_party/blink/renderer/platform/heap/visitor.h" #include "third_party/blink/renderer/platform/wtf/casting.h" #include "third_party/blink/renderer/platform/wtf/text/string_view.h" #include "third_party/blink/renderer/platform/wtf/text/wtf_string.h" #include "third_party/blink/renderer/platform/wtf/text/wtf_uchar.h" #include "third_party/skia/include/core/SkColor.h" #include "third_party/skia/include/core/SkMatrix.h" namespace blink { static ColorParseResult ParseColor(Color& parsed_color, const String& color_string, mojom::blink::ColorScheme color_scheme, const ui::ColorProvider* color_provider, bool can_expose_accent_color) { if (EqualIgnoringAsciiCase(color_string, "currentcolor")) { return ColorParseResult::kCurrentColor; } if (CSSParser::ParseColor(parsed_color, color_string)) { return ColorParseResult::kColor; } if (CSSParser::ParseSystemColor(parsed_color, color_string, color_scheme, color_provider, can_expose_accent_color)) { return ColorParseResult::kColor; } CSSParserTokenStream stream(color_string); CSSParserLocalContext local_context = CSSParserLocalContext::CreateWithoutPropertyForCanvas(); const CSSValue* parsed_value = css_parsing_utils::ConsumeColorWithoutElementAndPropertyContext( stream, *StrictCSSParserContext(SecureContextMode::kInsecureContext), local_context); if (parsed_value && (parsed_value->IsAlphaColorValue() || parsed_value->IsColorMixValue() || parsed_value->IsRelativeColorValue() || parsed_value->IsUnresolvedColorValue())) { static const TextLinkColors kDefaultTextLinkColors{}; // TODO(40946458): Don't use default length resolver here! const ResolveColorValueContext context{ .length_resolver = CSSToLengthConversionData(/*element=*/nullptr), .text_link_colors = kDefaultTextLinkColors, .used_color_scheme = color_scheme, .color_provider = color_provider, .can_expose_accent_color = can_expose_accent_color}; const StyleColor style_color = ResolveColorValue(*parsed_value, context); parsed_color = style_color.Resolve(Color::kBlack, color_scheme); return ColorParseResult::kColorFunction; } return ColorParseResult::kParseFailed; } ColorParseResult ParseCanvasColorString(const String& color_string, mojom::blink::ColorScheme color_scheme, Color& parsed_color, const ui::ColorProvider* color_provider, bool can_expose_accent_color) { return ParseColor(parsed_color, color_string.StripWhiteSpace(IsHTMLSpace), color_scheme, color_provider, can_expose_accent_color); } bool ParseCanvasColorString(const String& color_string, Color& parsed_color) { const ColorParseResult parse_result = ParseCanvasColorString( color_string, mojom::blink::ColorScheme::kLight, parsed_color, /*color_provider=*/nullptr, /*can_expose_accent_color=*/false); switch (parse_result) { case ColorParseResult::kColor: case ColorParseResult::kColorFunction: return true; case ColorParseResult::kCurrentColor: parsed_color = Color::kBlack; return true; case ColorParseResult::kParseFailed: return false; } } void CanvasStyle::ApplyToFlags(cc::PaintFlags& flags, float global_alpha) const { switch (type_) { case kColor: ApplyColorToFlags(flags, global_alpha); break; case kGradient: GetCanvasGradient()->GetGradient()->ApplyToFlags(flags, SkMatrix::I(), ImageDrawOptions()); flags.setColor(SkColor4f(0.0f, 0.0f, 0.0f, global_alpha)); break; case kImagePattern: GetCanvasPattern()->GetPattern()->ApplyToFlags( flags, GetCanvasPattern()->GetTransform().ToSkMatrix()); flags.setColor(SkColor4f(0.0f, 0.0f, 0.0f, global_alpha)); break; default: NOTREACHED(); } } void CanvasStyle::Trace(Visitor* visitor) const { visitor->Trace(gradient_); visitor->Trace(pattern_); } } // namespace blink