mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-01 00:32:11 +00:00
1b11e0ebdb
Just defaulting to BGRA is going to cause trouble down the line. Differential Revision: https://phabricator.services.mozilla.com/D138897
339 lines
11 KiB
C++
339 lines
11 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef MOZILLA_GFX_HELPERSSKIA_H_
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#define MOZILLA_GFX_HELPERSSKIA_H_
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#include "2D.h"
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#include "skia/include/core/SkCanvas.h"
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#include "skia/include/effects/SkDashPathEffect.h"
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#include "skia/include/core/SkShader.h"
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#include "mozilla/Assertions.h"
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#include <vector>
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#include "nsDebug.h"
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namespace mozilla {
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namespace gfx {
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static inline SkColorType GfxFormatToSkiaColorType(SurfaceFormat format) {
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switch (format) {
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case SurfaceFormat::B8G8R8A8:
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return kBGRA_8888_SkColorType;
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case SurfaceFormat::B8G8R8X8:
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// We probably need to do something here.
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return kBGRA_8888_SkColorType;
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case SurfaceFormat::R5G6B5_UINT16:
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return kRGB_565_SkColorType;
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case SurfaceFormat::A8:
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return kAlpha_8_SkColorType;
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case SurfaceFormat::R8G8B8A8:
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return kRGBA_8888_SkColorType;
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case SurfaceFormat::A8R8G8B8:
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MOZ_DIAGNOSTIC_ASSERT(false, "A8R8G8B8 unsupported by Skia");
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return kRGBA_8888_SkColorType;
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default:
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MOZ_DIAGNOSTIC_ASSERT(false, "Unknown surface format");
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return kRGBA_8888_SkColorType;
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}
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}
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static inline SurfaceFormat SkiaColorTypeToGfxFormat(
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SkColorType aColorType, SkAlphaType aAlphaType = kPremul_SkAlphaType) {
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switch (aColorType) {
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case kBGRA_8888_SkColorType:
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return aAlphaType == kOpaque_SkAlphaType ? SurfaceFormat::B8G8R8X8
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: SurfaceFormat::B8G8R8A8;
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case kRGB_565_SkColorType:
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return SurfaceFormat::R5G6B5_UINT16;
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case kAlpha_8_SkColorType:
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return SurfaceFormat::A8;
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default:
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return SurfaceFormat::B8G8R8A8;
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}
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}
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static inline SkAlphaType GfxFormatToSkiaAlphaType(SurfaceFormat format) {
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switch (format) {
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case SurfaceFormat::B8G8R8X8:
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case SurfaceFormat::R5G6B5_UINT16:
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return kOpaque_SkAlphaType;
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default:
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return kPremul_SkAlphaType;
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}
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}
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static inline SkImageInfo MakeSkiaImageInfo(const IntSize& aSize,
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SurfaceFormat aFormat) {
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return SkImageInfo::Make(aSize.width, aSize.height,
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GfxFormatToSkiaColorType(aFormat),
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GfxFormatToSkiaAlphaType(aFormat));
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}
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static inline void GfxMatrixToSkiaMatrix(const Matrix& mat, SkMatrix& retval) {
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retval.setAll(SkFloatToScalar(mat._11), SkFloatToScalar(mat._21),
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SkFloatToScalar(mat._31), SkFloatToScalar(mat._12),
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SkFloatToScalar(mat._22), SkFloatToScalar(mat._32), 0, 0,
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SK_Scalar1);
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}
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static inline void GfxMatrixToSkiaMatrix(const Matrix4x4& aMatrix,
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SkMatrix& aResult) {
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aResult.setAll(SkFloatToScalar(aMatrix._11), SkFloatToScalar(aMatrix._21),
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SkFloatToScalar(aMatrix._41), SkFloatToScalar(aMatrix._12),
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SkFloatToScalar(aMatrix._22), SkFloatToScalar(aMatrix._42),
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SkFloatToScalar(aMatrix._14), SkFloatToScalar(aMatrix._24),
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SkFloatToScalar(aMatrix._44));
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}
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static inline SkPaint::Cap CapStyleToSkiaCap(CapStyle aCap) {
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switch (aCap) {
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case CapStyle::BUTT:
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return SkPaint::kButt_Cap;
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case CapStyle::ROUND:
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return SkPaint::kRound_Cap;
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case CapStyle::SQUARE:
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return SkPaint::kSquare_Cap;
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}
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return SkPaint::kDefault_Cap;
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}
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static inline SkPaint::Join JoinStyleToSkiaJoin(JoinStyle aJoin) {
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switch (aJoin) {
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case JoinStyle::BEVEL:
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return SkPaint::kBevel_Join;
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case JoinStyle::ROUND:
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return SkPaint::kRound_Join;
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case JoinStyle::MITER:
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case JoinStyle::MITER_OR_BEVEL:
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return SkPaint::kMiter_Join;
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}
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return SkPaint::kDefault_Join;
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}
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static inline bool StrokeOptionsToPaint(SkPaint& aPaint,
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const StrokeOptions& aOptions,
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bool aUsePathEffects = true) {
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// Skia renders 0 width strokes with a width of 1 (and in black),
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// so we should just skip the draw call entirely.
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// Skia does not handle non-finite line widths.
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if (!aOptions.mLineWidth || !IsFinite(aOptions.mLineWidth)) {
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return false;
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}
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aPaint.setStrokeWidth(SkFloatToScalar(aOptions.mLineWidth));
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aPaint.setStrokeMiter(SkFloatToScalar(aOptions.mMiterLimit));
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aPaint.setStrokeCap(CapStyleToSkiaCap(aOptions.mLineCap));
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aPaint.setStrokeJoin(JoinStyleToSkiaJoin(aOptions.mLineJoin));
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if (aOptions.mDashLength > 0 && aUsePathEffects) {
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// Skia only supports dash arrays that are multiples of 2.
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uint32_t dashCount;
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if (aOptions.mDashLength % 2 == 0) {
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dashCount = aOptions.mDashLength;
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} else {
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dashCount = aOptions.mDashLength * 2;
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}
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std::vector<SkScalar> pattern;
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pattern.resize(dashCount);
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for (uint32_t i = 0; i < dashCount; i++) {
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pattern[i] =
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SkFloatToScalar(aOptions.mDashPattern[i % aOptions.mDashLength]);
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}
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sk_sp<SkPathEffect> dash = SkDashPathEffect::Make(
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&pattern.front(), dashCount, SkFloatToScalar(aOptions.mDashOffset));
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aPaint.setPathEffect(dash);
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}
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aPaint.setStyle(SkPaint::kStroke_Style);
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return true;
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}
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static inline SkBlendMode GfxOpToSkiaOp(CompositionOp op) {
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switch (op) {
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case CompositionOp::OP_OVER:
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return SkBlendMode::kSrcOver;
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case CompositionOp::OP_ADD:
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return SkBlendMode::kPlus;
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case CompositionOp::OP_ATOP:
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return SkBlendMode::kSrcATop;
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case CompositionOp::OP_OUT:
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return SkBlendMode::kSrcOut;
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case CompositionOp::OP_IN:
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return SkBlendMode::kSrcIn;
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case CompositionOp::OP_SOURCE:
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return SkBlendMode::kSrc;
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case CompositionOp::OP_DEST_IN:
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return SkBlendMode::kDstIn;
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case CompositionOp::OP_DEST_OUT:
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return SkBlendMode::kDstOut;
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case CompositionOp::OP_DEST_OVER:
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return SkBlendMode::kDstOver;
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case CompositionOp::OP_DEST_ATOP:
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return SkBlendMode::kDstATop;
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case CompositionOp::OP_XOR:
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return SkBlendMode::kXor;
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case CompositionOp::OP_MULTIPLY:
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return SkBlendMode::kMultiply;
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case CompositionOp::OP_SCREEN:
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return SkBlendMode::kScreen;
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case CompositionOp::OP_OVERLAY:
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return SkBlendMode::kOverlay;
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case CompositionOp::OP_DARKEN:
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return SkBlendMode::kDarken;
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case CompositionOp::OP_LIGHTEN:
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return SkBlendMode::kLighten;
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case CompositionOp::OP_COLOR_DODGE:
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return SkBlendMode::kColorDodge;
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case CompositionOp::OP_COLOR_BURN:
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return SkBlendMode::kColorBurn;
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case CompositionOp::OP_HARD_LIGHT:
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return SkBlendMode::kHardLight;
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case CompositionOp::OP_SOFT_LIGHT:
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return SkBlendMode::kSoftLight;
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case CompositionOp::OP_DIFFERENCE:
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return SkBlendMode::kDifference;
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case CompositionOp::OP_EXCLUSION:
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return SkBlendMode::kExclusion;
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case CompositionOp::OP_HUE:
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return SkBlendMode::kHue;
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case CompositionOp::OP_SATURATION:
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return SkBlendMode::kSaturation;
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case CompositionOp::OP_COLOR:
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return SkBlendMode::kColor;
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case CompositionOp::OP_LUMINOSITY:
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return SkBlendMode::kLuminosity;
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default:
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return SkBlendMode::kSrcOver;
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}
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}
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/* There's quite a bit of inconsistency about
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* whether float colors should be rounded with .5f.
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* We choose to do it to match cairo which also
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* happens to match the Direct3D specs */
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static inline U8CPU ColorFloatToByte(Float color) {
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// XXX: do a better job converting to int
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return U8CPU(color * 255.f + .5f);
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};
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static inline SkColor ColorToSkColor(const DeviceColor& color, Float aAlpha) {
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return SkColorSetARGB(ColorFloatToByte(color.a * aAlpha),
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ColorFloatToByte(color.r), ColorFloatToByte(color.g),
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ColorFloatToByte(color.b));
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}
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static inline SkPoint PointToSkPoint(const Point& aPoint) {
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return SkPoint::Make(SkFloatToScalar(aPoint.x), SkFloatToScalar(aPoint.y));
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}
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static inline SkRect RectToSkRect(const Rect& aRect) {
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return SkRect::MakeXYWH(
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SkFloatToScalar(aRect.X()), SkFloatToScalar(aRect.Y()),
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SkFloatToScalar(aRect.Width()), SkFloatToScalar(aRect.Height()));
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}
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static inline SkRect IntRectToSkRect(const IntRect& aRect) {
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return SkRect::MakeXYWH(SkIntToScalar(aRect.X()), SkIntToScalar(aRect.Y()),
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SkIntToScalar(aRect.Width()),
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SkIntToScalar(aRect.Height()));
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}
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static inline SkIRect RectToSkIRect(const Rect& aRect) {
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return SkIRect::MakeXYWH(int32_t(aRect.X()), int32_t(aRect.Y()),
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int32_t(aRect.Width()), int32_t(aRect.Height()));
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}
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static inline SkIRect IntRectToSkIRect(const IntRect& aRect) {
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return SkIRect::MakeXYWH(aRect.X(), aRect.Y(), aRect.Width(), aRect.Height());
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}
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static inline IntRect SkIRectToIntRect(const SkIRect& aRect) {
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return IntRect(aRect.x(), aRect.y(), aRect.width(), aRect.height());
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}
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static inline Point SkPointToPoint(const SkPoint& aPoint) {
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return Point(SkScalarToFloat(aPoint.x()), SkScalarToFloat(aPoint.y()));
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}
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static inline Rect SkRectToRect(const SkRect& aRect) {
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return Rect(SkScalarToFloat(aRect.x()), SkScalarToFloat(aRect.y()),
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SkScalarToFloat(aRect.width()), SkScalarToFloat(aRect.height()));
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}
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static inline SkTileMode ExtendModeToTileMode(ExtendMode aMode, Axis aAxis) {
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switch (aMode) {
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case ExtendMode::CLAMP:
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return SkTileMode::kClamp;
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case ExtendMode::REPEAT:
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return SkTileMode::kRepeat;
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case ExtendMode::REFLECT:
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return SkTileMode::kMirror;
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case ExtendMode::REPEAT_X: {
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return aAxis == Axis::X_AXIS ? SkTileMode::kRepeat : SkTileMode::kClamp;
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}
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case ExtendMode::REPEAT_Y: {
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return aAxis == Axis::Y_AXIS ? SkTileMode::kRepeat : SkTileMode::kClamp;
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}
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}
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return SkTileMode::kClamp;
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}
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static inline SkFontHinting GfxHintingToSkiaHinting(FontHinting aHinting) {
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switch (aHinting) {
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case FontHinting::NONE:
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return SkFontHinting::kNone;
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case FontHinting::LIGHT:
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return SkFontHinting::kSlight;
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case FontHinting::NORMAL:
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return SkFontHinting::kNormal;
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case FontHinting::FULL:
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return SkFontHinting::kFull;
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}
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return SkFontHinting::kNormal;
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}
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static inline FillRule GetFillRule(SkPath::FillType aFillType) {
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switch (aFillType) {
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case SkPath::kWinding_FillType:
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return FillRule::FILL_WINDING;
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case SkPath::kEvenOdd_FillType:
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return FillRule::FILL_EVEN_ODD;
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case SkPath::kInverseWinding_FillType:
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case SkPath::kInverseEvenOdd_FillType:
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default:
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NS_WARNING("Unsupported fill type\n");
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break;
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}
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return FillRule::FILL_EVEN_ODD;
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}
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/**
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* Returns true if the canvas is backed by pixels. Returns false if the canvas
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* wraps an SkPDFDocument, for example.
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*
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* Note: It is not clear whether the test used to implement this function may
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* result in it returning false in some circumstances even when the canvas
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* _is_ pixel backed. In other words maybe it is possible for such a canvas to
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* have kUnknown_SkPixelGeometry?
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*/
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static inline bool IsBackedByPixels(const SkCanvas* aCanvas) {
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SkSurfaceProps props(0, kUnknown_SkPixelGeometry);
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if (!aCanvas->getProps(&props) ||
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props.pixelGeometry() == kUnknown_SkPixelGeometry) {
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return false;
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}
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return true;
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}
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} // namespace gfx
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} // namespace mozilla
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#endif /* MOZILLA_GFX_HELPERSSKIA_H_ */
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