зеркало из https://github.com/mozilla/gecko-dev.git
278 строки
7.2 KiB
C++
278 строки
7.2 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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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/SkCanvas.h"
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#include "skia/SkDashPathEffect.h"
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#include "skia/SkShader.h"
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#ifdef USE_SKIA_GPU
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#include "skia/GrTypes.h"
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#endif
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#include "mozilla/Assertions.h"
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#include <vector>
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namespace mozilla {
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namespace gfx {
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static inline SkBitmap::Config
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GfxFormatToSkiaConfig(SurfaceFormat format)
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{
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switch (format)
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{
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case FORMAT_B8G8R8A8:
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return SkBitmap::kARGB_8888_Config;
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case FORMAT_B8G8R8X8:
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// We probably need to do something here.
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return SkBitmap::kARGB_8888_Config;
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case FORMAT_R5G6B5:
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return SkBitmap::kRGB_565_Config;
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case FORMAT_A8:
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return SkBitmap::kA8_Config;
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default:
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return SkBitmap::kARGB_8888_Config;
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}
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}
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static inline SurfaceFormat
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SkiaConfigToGfxFormat(SkBitmap::Config config)
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{
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switch (config)
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{
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case SkBitmap::kARGB_8888_Config:
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return FORMAT_B8G8R8A8;
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case SkBitmap::kRGB_565_Config:
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return FORMAT_R5G6B5;
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case SkBitmap::kA8_Config:
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return FORMAT_A8;
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default:
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return FORMAT_B8G8R8A8;
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}
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}
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#ifdef USE_SKIA_GPU
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static inline GrPixelConfig
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GfxFormatToGrConfig(SurfaceFormat format)
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{
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switch (format)
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{
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case FORMAT_B8G8R8A8:
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return kBGRA_8888_GrPixelConfig;
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case FORMAT_B8G8R8X8:
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// We probably need to do something here.
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return kBGRA_8888_GrPixelConfig;
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case FORMAT_R5G6B5:
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return kRGB_565_GrPixelConfig;
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case FORMAT_A8:
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return kAlpha_8_GrPixelConfig;
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default:
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return kRGBA_8888_GrPixelConfig;
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}
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}
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#endif
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static inline void
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GfxMatrixToSkiaMatrix(const Matrix& mat, SkMatrix& retval)
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{
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retval.setAll(SkFloatToScalar(mat._11), SkFloatToScalar(mat._21), SkFloatToScalar(mat._31),
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SkFloatToScalar(mat._12), SkFloatToScalar(mat._22), SkFloatToScalar(mat._32),
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0, 0, SK_Scalar1);
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}
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static inline SkPaint::Cap
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CapStyleToSkiaCap(CapStyle aCap)
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{
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switch (aCap)
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{
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case CAP_BUTT:
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return SkPaint::kButt_Cap;
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case CAP_ROUND:
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return SkPaint::kRound_Cap;
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case CAP_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
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JoinStyleToSkiaJoin(JoinStyle aJoin)
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{
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switch (aJoin)
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{
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case JOIN_BEVEL:
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return SkPaint::kBevel_Join;
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case JOIN_ROUND:
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return SkPaint::kRound_Join;
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case JOIN_MITER:
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case JOIN_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
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StrokeOptionsToPaint(SkPaint& aPaint, const StrokeOptions &aOptions)
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{
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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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if (!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) {
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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] = SkFloatToScalar(aOptions.mDashPattern[i % aOptions.mDashLength]);
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}
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SkDashPathEffect* dash = new SkDashPathEffect(&pattern.front(),
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dashCount,
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SkFloatToScalar(aOptions.mDashOffset));
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SkSafeUnref(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 SkXfermode::Mode
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GfxOpToSkiaOp(CompositionOp op)
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{
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switch (op)
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{
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case OP_OVER:
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return SkXfermode::kSrcOver_Mode;
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case OP_ADD:
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return SkXfermode::kPlus_Mode;
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case OP_ATOP:
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return SkXfermode::kSrcATop_Mode;
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case OP_OUT:
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return SkXfermode::kSrcOut_Mode;
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case OP_IN:
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return SkXfermode::kSrcIn_Mode;
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case OP_SOURCE:
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return SkXfermode::kSrc_Mode;
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case OP_DEST_IN:
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return SkXfermode::kDstIn_Mode;
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case OP_DEST_OUT:
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return SkXfermode::kDstOut_Mode;
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case OP_DEST_OVER:
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return SkXfermode::kDstOver_Mode;
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case OP_DEST_ATOP:
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return SkXfermode::kDstATop_Mode;
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case OP_XOR:
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return SkXfermode::kXor_Mode;
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case OP_MULTIPLY:
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return SkXfermode::kMultiply_Mode;
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case OP_SCREEN:
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return SkXfermode::kScreen_Mode;
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case OP_OVERLAY:
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return SkXfermode::kOverlay_Mode;
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case OP_DARKEN:
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return SkXfermode::kDarken_Mode;
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case OP_LIGHTEN:
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return SkXfermode::kLighten_Mode;
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case OP_COLOR_DODGE:
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return SkXfermode::kColorDodge_Mode;
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case OP_COLOR_BURN:
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return SkXfermode::kColorBurn_Mode;
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case OP_HARD_LIGHT:
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return SkXfermode::kHardLight_Mode;
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case OP_SOFT_LIGHT:
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return SkXfermode::kSoftLight_Mode;
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case OP_DIFFERENCE:
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return SkXfermode::kDifference_Mode;
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case OP_EXCLUSION:
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return SkXfermode::kExclusion_Mode;
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case OP_HUE:
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return SkXfermode::kHue_Mode;
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case OP_SATURATION:
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return SkXfermode::kSaturation_Mode;
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case OP_COLOR:
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return SkXfermode::kColor_Mode;
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case OP_LUMINOSITY:
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return SkXfermode::kLuminosity_Mode;
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default:
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return SkXfermode::kSrcOver_Mode;
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}
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}
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static inline SkColor ColorToSkColor(const Color &color, Float aAlpha)
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{
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//XXX: do a better job converting to int
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return SkColorSetARGB(U8CPU(color.a*aAlpha*255.0), U8CPU(color.r*255.0),
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U8CPU(color.g*255.0), U8CPU(color.b*255.0));
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}
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static inline SkRect
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RectToSkRect(const Rect& aRect)
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{
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return SkRect::MakeXYWH(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
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IntRectToSkRect(const IntRect& aRect)
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{
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return SkRect::MakeXYWH(SkIntToScalar(aRect.x), SkIntToScalar(aRect.y),
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SkIntToScalar(aRect.width), SkIntToScalar(aRect.height));
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}
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static inline SkIRect
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RectToSkIRect(const Rect& aRect)
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{
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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
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IntRectToSkIRect(const IntRect& aRect)
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{
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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 Point
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SkPointToPoint(const SkPoint &aPoint)
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{
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return Point(SkScalarToFloat(aPoint.x()), SkScalarToFloat(aPoint.y()));
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}
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static inline SkShader::TileMode
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ExtendModeToTileMode(ExtendMode aMode)
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{
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switch (aMode)
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{
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case EXTEND_CLAMP:
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return SkShader::kClamp_TileMode;
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case EXTEND_REPEAT:
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return SkShader::kRepeat_TileMode;
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case EXTEND_REFLECT:
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return SkShader::kMirror_TileMode;
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}
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return SkShader::kClamp_TileMode;
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}
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}
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}
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#endif /* MOZILLA_GFX_HELPERSSKIA_H_ */
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