1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/2d/HelpersSkia.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,303 @@
1.4 +/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
1.5 + * This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef MOZILLA_GFX_HELPERSSKIA_H_
1.10 +#define MOZILLA_GFX_HELPERSSKIA_H_
1.11 +
1.12 +#include "2D.h"
1.13 +#include "skia/SkCanvas.h"
1.14 +#include "skia/SkDashPathEffect.h"
1.15 +#include "skia/SkShader.h"
1.16 +#ifdef USE_SKIA_GPU
1.17 +#include "skia/GrTypes.h"
1.18 +#endif
1.19 +#include "mozilla/Assertions.h"
1.20 +#include <vector>
1.21 +
1.22 +namespace mozilla {
1.23 +namespace gfx {
1.24 +
1.25 +static inline SkBitmap::Config
1.26 +GfxFormatToSkiaConfig(SurfaceFormat format)
1.27 +{
1.28 + switch (format)
1.29 + {
1.30 + case SurfaceFormat::B8G8R8A8:
1.31 + return SkBitmap::kARGB_8888_Config;
1.32 + case SurfaceFormat::B8G8R8X8:
1.33 + // We probably need to do something here.
1.34 + return SkBitmap::kARGB_8888_Config;
1.35 + case SurfaceFormat::R5G6B5:
1.36 + return SkBitmap::kRGB_565_Config;
1.37 + case SurfaceFormat::A8:
1.38 + return SkBitmap::kA8_Config;
1.39 + default:
1.40 + return SkBitmap::kARGB_8888_Config;
1.41 + }
1.42 +}
1.43 +
1.44 +static inline SkColorType
1.45 +GfxFormatToSkiaColorType(SurfaceFormat format)
1.46 +{
1.47 + switch (format)
1.48 + {
1.49 + case SurfaceFormat::B8G8R8A8:
1.50 + return kBGRA_8888_SkColorType;
1.51 + case SurfaceFormat::B8G8R8X8:
1.52 + // We probably need to do something here.
1.53 + return kBGRA_8888_SkColorType;
1.54 + case SurfaceFormat::R5G6B5:
1.55 + return kRGB_565_SkColorType;
1.56 + case SurfaceFormat::A8:
1.57 + return kAlpha_8_SkColorType;
1.58 + default:
1.59 + return kRGBA_8888_SkColorType;
1.60 + }
1.61 +}
1.62 +
1.63 +static inline SurfaceFormat
1.64 +SkiaConfigToGfxFormat(SkBitmap::Config config)
1.65 +{
1.66 + switch (config)
1.67 + {
1.68 + case SkBitmap::kARGB_8888_Config:
1.69 + return SurfaceFormat::B8G8R8A8;
1.70 + case SkBitmap::kRGB_565_Config:
1.71 + return SurfaceFormat::R5G6B5;
1.72 + case SkBitmap::kA8_Config:
1.73 + return SurfaceFormat::A8;
1.74 + default:
1.75 + return SurfaceFormat::B8G8R8A8;
1.76 + }
1.77 +}
1.78 +
1.79 +#ifdef USE_SKIA_GPU
1.80 +static inline GrPixelConfig
1.81 +GfxFormatToGrConfig(SurfaceFormat format)
1.82 +{
1.83 + switch (format)
1.84 + {
1.85 + case SurfaceFormat::B8G8R8A8:
1.86 + return kBGRA_8888_GrPixelConfig;
1.87 + case SurfaceFormat::B8G8R8X8:
1.88 + // We probably need to do something here.
1.89 + return kBGRA_8888_GrPixelConfig;
1.90 + case SurfaceFormat::R5G6B5:
1.91 + return kRGB_565_GrPixelConfig;
1.92 + case SurfaceFormat::A8:
1.93 + return kAlpha_8_GrPixelConfig;
1.94 + default:
1.95 + return kRGBA_8888_GrPixelConfig;
1.96 + }
1.97 +
1.98 +}
1.99 +#endif
1.100 +static inline void
1.101 +GfxMatrixToSkiaMatrix(const Matrix& mat, SkMatrix& retval)
1.102 +{
1.103 + retval.setAll(SkFloatToScalar(mat._11), SkFloatToScalar(mat._21), SkFloatToScalar(mat._31),
1.104 + SkFloatToScalar(mat._12), SkFloatToScalar(mat._22), SkFloatToScalar(mat._32),
1.105 + 0, 0, SK_Scalar1);
1.106 +}
1.107 +
1.108 +static inline SkPaint::Cap
1.109 +CapStyleToSkiaCap(CapStyle aCap)
1.110 +{
1.111 + switch (aCap)
1.112 + {
1.113 + case CapStyle::BUTT:
1.114 + return SkPaint::kButt_Cap;
1.115 + case CapStyle::ROUND:
1.116 + return SkPaint::kRound_Cap;
1.117 + case CapStyle::SQUARE:
1.118 + return SkPaint::kSquare_Cap;
1.119 + }
1.120 + return SkPaint::kDefault_Cap;
1.121 +}
1.122 +
1.123 +static inline SkPaint::Join
1.124 +JoinStyleToSkiaJoin(JoinStyle aJoin)
1.125 +{
1.126 + switch (aJoin)
1.127 + {
1.128 + case JoinStyle::BEVEL:
1.129 + return SkPaint::kBevel_Join;
1.130 + case JoinStyle::ROUND:
1.131 + return SkPaint::kRound_Join;
1.132 + case JoinStyle::MITER:
1.133 + case JoinStyle::MITER_OR_BEVEL:
1.134 + return SkPaint::kMiter_Join;
1.135 + }
1.136 + return SkPaint::kDefault_Join;
1.137 +}
1.138 +
1.139 +static inline bool
1.140 +StrokeOptionsToPaint(SkPaint& aPaint, const StrokeOptions &aOptions)
1.141 +{
1.142 + // Skia renders 0 width strokes with a width of 1 (and in black),
1.143 + // so we should just skip the draw call entirely.
1.144 + if (!aOptions.mLineWidth) {
1.145 + return false;
1.146 + }
1.147 + aPaint.setStrokeWidth(SkFloatToScalar(aOptions.mLineWidth));
1.148 + aPaint.setStrokeMiter(SkFloatToScalar(aOptions.mMiterLimit));
1.149 + aPaint.setStrokeCap(CapStyleToSkiaCap(aOptions.mLineCap));
1.150 + aPaint.setStrokeJoin(JoinStyleToSkiaJoin(aOptions.mLineJoin));
1.151 +
1.152 + if (aOptions.mDashLength > 0) {
1.153 + // Skia only supports dash arrays that are multiples of 2.
1.154 + uint32_t dashCount;
1.155 +
1.156 + if (aOptions.mDashLength % 2 == 0) {
1.157 + dashCount = aOptions.mDashLength;
1.158 + } else {
1.159 + dashCount = aOptions.mDashLength * 2;
1.160 + }
1.161 +
1.162 + std::vector<SkScalar> pattern;
1.163 + pattern.resize(dashCount);
1.164 +
1.165 + for (uint32_t i = 0; i < dashCount; i++) {
1.166 + pattern[i] = SkFloatToScalar(aOptions.mDashPattern[i % aOptions.mDashLength]);
1.167 + }
1.168 +
1.169 + SkDashPathEffect* dash = SkDashPathEffect::Create(&pattern.front(),
1.170 + dashCount,
1.171 + SkFloatToScalar(aOptions.mDashOffset));
1.172 + SkSafeUnref(aPaint.setPathEffect(dash));
1.173 + }
1.174 +
1.175 + aPaint.setStyle(SkPaint::kStroke_Style);
1.176 + return true;
1.177 +}
1.178 +
1.179 +static inline SkXfermode::Mode
1.180 +GfxOpToSkiaOp(CompositionOp op)
1.181 +{
1.182 + switch (op)
1.183 + {
1.184 + case CompositionOp::OP_OVER:
1.185 + return SkXfermode::kSrcOver_Mode;
1.186 + case CompositionOp::OP_ADD:
1.187 + return SkXfermode::kPlus_Mode;
1.188 + case CompositionOp::OP_ATOP:
1.189 + return SkXfermode::kSrcATop_Mode;
1.190 + case CompositionOp::OP_OUT:
1.191 + return SkXfermode::kSrcOut_Mode;
1.192 + case CompositionOp::OP_IN:
1.193 + return SkXfermode::kSrcIn_Mode;
1.194 + case CompositionOp::OP_SOURCE:
1.195 + return SkXfermode::kSrc_Mode;
1.196 + case CompositionOp::OP_DEST_IN:
1.197 + return SkXfermode::kDstIn_Mode;
1.198 + case CompositionOp::OP_DEST_OUT:
1.199 + return SkXfermode::kDstOut_Mode;
1.200 + case CompositionOp::OP_DEST_OVER:
1.201 + return SkXfermode::kDstOver_Mode;
1.202 + case CompositionOp::OP_DEST_ATOP:
1.203 + return SkXfermode::kDstATop_Mode;
1.204 + case CompositionOp::OP_XOR:
1.205 + return SkXfermode::kXor_Mode;
1.206 + case CompositionOp::OP_MULTIPLY:
1.207 + return SkXfermode::kMultiply_Mode;
1.208 + case CompositionOp::OP_SCREEN:
1.209 + return SkXfermode::kScreen_Mode;
1.210 + case CompositionOp::OP_OVERLAY:
1.211 + return SkXfermode::kOverlay_Mode;
1.212 + case CompositionOp::OP_DARKEN:
1.213 + return SkXfermode::kDarken_Mode;
1.214 + case CompositionOp::OP_LIGHTEN:
1.215 + return SkXfermode::kLighten_Mode;
1.216 + case CompositionOp::OP_COLOR_DODGE:
1.217 + return SkXfermode::kColorDodge_Mode;
1.218 + case CompositionOp::OP_COLOR_BURN:
1.219 + return SkXfermode::kColorBurn_Mode;
1.220 + case CompositionOp::OP_HARD_LIGHT:
1.221 + return SkXfermode::kHardLight_Mode;
1.222 + case CompositionOp::OP_SOFT_LIGHT:
1.223 + return SkXfermode::kSoftLight_Mode;
1.224 + case CompositionOp::OP_DIFFERENCE:
1.225 + return SkXfermode::kDifference_Mode;
1.226 + case CompositionOp::OP_EXCLUSION:
1.227 + return SkXfermode::kExclusion_Mode;
1.228 + case CompositionOp::OP_HUE:
1.229 + return SkXfermode::kHue_Mode;
1.230 + case CompositionOp::OP_SATURATION:
1.231 + return SkXfermode::kSaturation_Mode;
1.232 + case CompositionOp::OP_COLOR:
1.233 + return SkXfermode::kColor_Mode;
1.234 + case CompositionOp::OP_LUMINOSITY:
1.235 + return SkXfermode::kLuminosity_Mode;
1.236 + default:
1.237 + return SkXfermode::kSrcOver_Mode;
1.238 + }
1.239 +}
1.240 +
1.241 +static inline SkColor ColorToSkColor(const Color &color, Float aAlpha)
1.242 +{
1.243 + //XXX: do a better job converting to int
1.244 + return SkColorSetARGB(U8CPU(color.a*aAlpha*255.0), U8CPU(color.r*255.0),
1.245 + U8CPU(color.g*255.0), U8CPU(color.b*255.0));
1.246 +}
1.247 +
1.248 +static inline SkRect
1.249 +RectToSkRect(const Rect& aRect)
1.250 +{
1.251 + return SkRect::MakeXYWH(SkFloatToScalar(aRect.x), SkFloatToScalar(aRect.y),
1.252 + SkFloatToScalar(aRect.width), SkFloatToScalar(aRect.height));
1.253 +}
1.254 +
1.255 +static inline SkRect
1.256 +IntRectToSkRect(const IntRect& aRect)
1.257 +{
1.258 + return SkRect::MakeXYWH(SkIntToScalar(aRect.x), SkIntToScalar(aRect.y),
1.259 + SkIntToScalar(aRect.width), SkIntToScalar(aRect.height));
1.260 +}
1.261 +
1.262 +static inline SkIRect
1.263 +RectToSkIRect(const Rect& aRect)
1.264 +{
1.265 + return SkIRect::MakeXYWH(int32_t(aRect.x), int32_t(aRect.y),
1.266 + int32_t(aRect.width), int32_t(aRect.height));
1.267 +}
1.268 +
1.269 +static inline SkIRect
1.270 +IntRectToSkIRect(const IntRect& aRect)
1.271 +{
1.272 + return SkIRect::MakeXYWH(aRect.x, aRect.y, aRect.width, aRect.height);
1.273 +}
1.274 +
1.275 +static inline Point
1.276 +SkPointToPoint(const SkPoint &aPoint)
1.277 +{
1.278 + return Point(SkScalarToFloat(aPoint.x()), SkScalarToFloat(aPoint.y()));
1.279 +}
1.280 +
1.281 +static inline Rect
1.282 +SkRectToRect(const SkRect &aRect)
1.283 +{
1.284 + return Rect(SkScalarToFloat(aRect.x()), SkScalarToFloat(aRect.y()),
1.285 + SkScalarToFloat(aRect.width()), SkScalarToFloat(aRect.height()));
1.286 +}
1.287 +
1.288 +static inline SkShader::TileMode
1.289 +ExtendModeToTileMode(ExtendMode aMode)
1.290 +{
1.291 + switch (aMode)
1.292 + {
1.293 + case ExtendMode::CLAMP:
1.294 + return SkShader::kClamp_TileMode;
1.295 + case ExtendMode::REPEAT:
1.296 + return SkShader::kRepeat_TileMode;
1.297 + case ExtendMode::REFLECT:
1.298 + return SkShader::kMirror_TileMode;
1.299 + }
1.300 + return SkShader::kClamp_TileMode;
1.301 +}
1.302 +
1.303 +}
1.304 +}
1.305 +
1.306 +#endif /* MOZILLA_GFX_HELPERSSKIA_H_ */
