0e3c55431b
recent changes to text rendering. Uses linear coverage falloff. Produces results that are perceptually more similar to L32 (raster and gpu). Smoothstep + sRGB was too soft. Plumb the gamma-correctness via DrawPathArgs, which also paves the way for other path rendering implementations to easily make decisions about rendering technique based on that flag. Fix a few typos and formatting issues from my most recent change. BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1889453002 Review URL: https://codereview.chromium.org/1889453002
99 lines
3.3 KiB
C++
99 lines
3.3 KiB
C++
/*
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* Copyright 2014 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkSurfaceProps_DEFINED
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#define SkSurfaceProps_DEFINED
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#include "SkTypes.h"
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/**
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* Description of how the LCD strips are arranged for each pixel. If this is unknown, or the
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* pixels are meant to be "portable" and/or transformed before showing (e.g. rotated, scaled)
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* then use kUnknown_SkPixelGeometry.
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*/
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enum SkPixelGeometry {
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kUnknown_SkPixelGeometry,
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kRGB_H_SkPixelGeometry,
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kBGR_H_SkPixelGeometry,
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kRGB_V_SkPixelGeometry,
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kBGR_V_SkPixelGeometry,
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};
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// Returns true iff geo is a known geometry and is RGB.
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static inline bool SkPixelGeometryIsRGB(SkPixelGeometry geo) {
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return kRGB_H_SkPixelGeometry == geo || kRGB_V_SkPixelGeometry == geo;
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}
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// Returns true iff geo is a known geometry and is BGR.
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static inline bool SkPixelGeometryIsBGR(SkPixelGeometry geo) {
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return kBGR_H_SkPixelGeometry == geo || kBGR_V_SkPixelGeometry == geo;
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}
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// Returns true iff geo is a known geometry and is horizontal.
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static inline bool SkPixelGeometryIsH(SkPixelGeometry geo) {
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return kRGB_H_SkPixelGeometry == geo || kBGR_H_SkPixelGeometry == geo;
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}
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// Returns true iff geo is a known geometry and is vertical.
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static inline bool SkPixelGeometryIsV(SkPixelGeometry geo) {
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return kRGB_V_SkPixelGeometry == geo || kBGR_V_SkPixelGeometry == geo;
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}
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/**
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* Describes properties and constraints of a given SkSurface. The rendering engine can parse these
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* during drawing, and can sometimes optimize its performance (e.g. disabling an expensive
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* feature).
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*/
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class SK_API SkSurfaceProps {
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public:
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enum Flags {
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kDisallowAntiAlias_Flag = 1 << 0,
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kDisallowDither_Flag = 1 << 1,
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kUseDeviceIndependentFonts_Flag = 1 << 2,
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/**
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* This flag causes sRGB inputs to the color pipeline (images and other sRGB-tagged
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* colors) to be gamma-corrected (converted to linear) before use. Without this flag,
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* texture scaling and filtering is not gamma correct, preserving the behavior of Skia
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* up through 2015.
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*
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* It is recommended to enable this flag when rendering to an sRGB or floating point
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* surface.
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*/
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kGammaCorrect_Flag = 1 << 3,
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};
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/** Deprecated alias used by Chromium. Will be removed. */
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static const Flags kUseDistanceFieldFonts_Flag = kUseDeviceIndependentFonts_Flag;
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SkSurfaceProps(uint32_t flags, SkPixelGeometry);
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enum InitType {
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kLegacyFontHost_InitType
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};
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SkSurfaceProps(InitType);
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SkSurfaceProps(uint32_t flags, InitType);
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SkSurfaceProps(const SkSurfaceProps& other);
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uint32_t flags() const { return fFlags; }
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SkPixelGeometry pixelGeometry() const { return fPixelGeometry; }
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bool isDisallowAA() const { return SkToBool(fFlags & kDisallowAntiAlias_Flag); }
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bool isDisallowDither() const { return SkToBool(fFlags & kDisallowDither_Flag); }
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bool isUseDeviceIndependentFonts() const {
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return SkToBool(fFlags & kUseDeviceIndependentFonts_Flag);
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}
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bool isGammaCorrect() const { return SkToBool(fFlags & kGammaCorrect_Flag); }
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private:
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SkSurfaceProps();
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uint32_t fFlags;
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SkPixelGeometry fPixelGeometry;
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};
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#endif
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