1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/2d/HelpersCairo.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,288 @@
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_HELPERSCAIRO_H_
1.10 +#define MOZILLA_GFX_HELPERSCAIRO_H_
1.11 +
1.12 +#include "2D.h"
1.13 +#include "cairo.h"
1.14 +#include "Logging.h"
1.15 +
1.16 +namespace mozilla {
1.17 +namespace gfx {
1.18 +
1.19 +static inline cairo_operator_t
1.20 +GfxOpToCairoOp(CompositionOp op)
1.21 +{
1.22 + switch (op)
1.23 + {
1.24 + case CompositionOp::OP_OVER:
1.25 + return CAIRO_OPERATOR_OVER;
1.26 + case CompositionOp::OP_ADD:
1.27 + return CAIRO_OPERATOR_ADD;
1.28 + case CompositionOp::OP_ATOP:
1.29 + return CAIRO_OPERATOR_ATOP;
1.30 + case CompositionOp::OP_OUT:
1.31 + return CAIRO_OPERATOR_OUT;
1.32 + case CompositionOp::OP_IN:
1.33 + return CAIRO_OPERATOR_IN;
1.34 + case CompositionOp::OP_SOURCE:
1.35 + return CAIRO_OPERATOR_SOURCE;
1.36 + case CompositionOp::OP_DEST_IN:
1.37 + return CAIRO_OPERATOR_DEST_IN;
1.38 + case CompositionOp::OP_DEST_OUT:
1.39 + return CAIRO_OPERATOR_DEST_OUT;
1.40 + case CompositionOp::OP_DEST_OVER:
1.41 + return CAIRO_OPERATOR_DEST_OVER;
1.42 + case CompositionOp::OP_DEST_ATOP:
1.43 + return CAIRO_OPERATOR_DEST_ATOP;
1.44 + case CompositionOp::OP_XOR:
1.45 + return CAIRO_OPERATOR_XOR;
1.46 + case CompositionOp::OP_MULTIPLY:
1.47 + return CAIRO_OPERATOR_MULTIPLY;
1.48 + case CompositionOp::OP_SCREEN:
1.49 + return CAIRO_OPERATOR_SCREEN;
1.50 + case CompositionOp::OP_OVERLAY:
1.51 + return CAIRO_OPERATOR_OVERLAY;
1.52 + case CompositionOp::OP_DARKEN:
1.53 + return CAIRO_OPERATOR_DARKEN;
1.54 + case CompositionOp::OP_LIGHTEN:
1.55 + return CAIRO_OPERATOR_LIGHTEN;
1.56 + case CompositionOp::OP_COLOR_DODGE:
1.57 + return CAIRO_OPERATOR_COLOR_DODGE;
1.58 + case CompositionOp::OP_COLOR_BURN:
1.59 + return CAIRO_OPERATOR_COLOR_BURN;
1.60 + case CompositionOp::OP_HARD_LIGHT:
1.61 + return CAIRO_OPERATOR_HARD_LIGHT;
1.62 + case CompositionOp::OP_SOFT_LIGHT:
1.63 + return CAIRO_OPERATOR_SOFT_LIGHT;
1.64 + case CompositionOp::OP_DIFFERENCE:
1.65 + return CAIRO_OPERATOR_DIFFERENCE;
1.66 + case CompositionOp::OP_EXCLUSION:
1.67 + return CAIRO_OPERATOR_EXCLUSION;
1.68 + case CompositionOp::OP_HUE:
1.69 + return CAIRO_OPERATOR_HSL_HUE;
1.70 + case CompositionOp::OP_SATURATION:
1.71 + return CAIRO_OPERATOR_HSL_SATURATION;
1.72 + case CompositionOp::OP_COLOR:
1.73 + return CAIRO_OPERATOR_HSL_COLOR;
1.74 + case CompositionOp::OP_LUMINOSITY:
1.75 + return CAIRO_OPERATOR_HSL_LUMINOSITY;
1.76 + case CompositionOp::OP_COUNT:
1.77 + break;
1.78 + }
1.79 +
1.80 + return CAIRO_OPERATOR_OVER;
1.81 +}
1.82 +
1.83 +static inline cairo_antialias_t
1.84 +GfxAntialiasToCairoAntialias(AntialiasMode antialias)
1.85 +{
1.86 + switch (antialias)
1.87 + {
1.88 + case AntialiasMode::NONE:
1.89 + return CAIRO_ANTIALIAS_NONE;
1.90 + case AntialiasMode::GRAY:
1.91 + return CAIRO_ANTIALIAS_GRAY;
1.92 + case AntialiasMode::SUBPIXEL:
1.93 + return CAIRO_ANTIALIAS_SUBPIXEL;
1.94 + case AntialiasMode::DEFAULT:
1.95 + return CAIRO_ANTIALIAS_DEFAULT;
1.96 + }
1.97 + return CAIRO_ANTIALIAS_DEFAULT;
1.98 +}
1.99 +
1.100 +static inline cairo_filter_t
1.101 +GfxFilterToCairoFilter(Filter filter)
1.102 +{
1.103 + switch (filter)
1.104 + {
1.105 + case Filter::GOOD:
1.106 + return CAIRO_FILTER_GOOD;
1.107 + case Filter::LINEAR:
1.108 + return CAIRO_FILTER_BILINEAR;
1.109 + case Filter::POINT:
1.110 + return CAIRO_FILTER_NEAREST;
1.111 + }
1.112 +
1.113 + return CAIRO_FILTER_BILINEAR;
1.114 +}
1.115 +
1.116 +static inline cairo_extend_t
1.117 +GfxExtendToCairoExtend(ExtendMode extend)
1.118 +{
1.119 + switch (extend)
1.120 + {
1.121 + case ExtendMode::CLAMP:
1.122 + return CAIRO_EXTEND_PAD;
1.123 + case ExtendMode::REPEAT:
1.124 + return CAIRO_EXTEND_REPEAT;
1.125 + case ExtendMode::REFLECT:
1.126 + return CAIRO_EXTEND_REFLECT;
1.127 + }
1.128 +
1.129 + return CAIRO_EXTEND_PAD;
1.130 +}
1.131 +
1.132 +static inline cairo_format_t
1.133 +GfxFormatToCairoFormat(SurfaceFormat format)
1.134 +{
1.135 + switch (format)
1.136 + {
1.137 + case SurfaceFormat::B8G8R8A8:
1.138 + return CAIRO_FORMAT_ARGB32;
1.139 + case SurfaceFormat::B8G8R8X8:
1.140 + return CAIRO_FORMAT_RGB24;
1.141 + case SurfaceFormat::A8:
1.142 + return CAIRO_FORMAT_A8;
1.143 + case SurfaceFormat::R5G6B5:
1.144 + return CAIRO_FORMAT_RGB16_565;
1.145 + default:
1.146 + gfxWarning() << "Unknown image format";
1.147 + return CAIRO_FORMAT_ARGB32;
1.148 + }
1.149 +}
1.150 +
1.151 +static inline cairo_content_t
1.152 +GfxFormatToCairoContent(SurfaceFormat format)
1.153 +{
1.154 + switch (format)
1.155 + {
1.156 + case SurfaceFormat::B8G8R8A8:
1.157 + return CAIRO_CONTENT_COLOR_ALPHA;
1.158 + case SurfaceFormat::B8G8R8X8:
1.159 + case SurfaceFormat::R5G6B5: //fall through
1.160 + return CAIRO_CONTENT_COLOR;
1.161 + case SurfaceFormat::A8:
1.162 + return CAIRO_CONTENT_ALPHA;
1.163 + default:
1.164 + gfxWarning() << "Unknown image format";
1.165 + return CAIRO_CONTENT_COLOR_ALPHA;
1.166 + }
1.167 +}
1.168 +
1.169 +static inline cairo_line_join_t
1.170 +GfxLineJoinToCairoLineJoin(JoinStyle style)
1.171 +{
1.172 + switch (style)
1.173 + {
1.174 + case JoinStyle::BEVEL:
1.175 + return CAIRO_LINE_JOIN_BEVEL;
1.176 + case JoinStyle::ROUND:
1.177 + return CAIRO_LINE_JOIN_ROUND;
1.178 + case JoinStyle::MITER:
1.179 + return CAIRO_LINE_JOIN_MITER;
1.180 + case JoinStyle::MITER_OR_BEVEL:
1.181 + return CAIRO_LINE_JOIN_MITER;
1.182 + }
1.183 +
1.184 + return CAIRO_LINE_JOIN_MITER;
1.185 +}
1.186 +
1.187 +static inline cairo_line_cap_t
1.188 +GfxLineCapToCairoLineCap(CapStyle style)
1.189 +{
1.190 + switch (style)
1.191 + {
1.192 + case CapStyle::BUTT:
1.193 + return CAIRO_LINE_CAP_BUTT;
1.194 + case CapStyle::ROUND:
1.195 + return CAIRO_LINE_CAP_ROUND;
1.196 + case CapStyle::SQUARE:
1.197 + return CAIRO_LINE_CAP_SQUARE;
1.198 + }
1.199 +
1.200 + return CAIRO_LINE_CAP_BUTT;
1.201 +}
1.202 +
1.203 +static inline SurfaceFormat
1.204 +CairoContentToGfxFormat(cairo_content_t content)
1.205 +{
1.206 + switch (content)
1.207 + {
1.208 + case CAIRO_CONTENT_COLOR_ALPHA:
1.209 + return SurfaceFormat::B8G8R8A8;
1.210 + case CAIRO_CONTENT_COLOR:
1.211 + // BEWARE! format may be 565
1.212 + return SurfaceFormat::B8G8R8X8;
1.213 + case CAIRO_CONTENT_ALPHA:
1.214 + return SurfaceFormat::A8;
1.215 + }
1.216 +
1.217 + return SurfaceFormat::B8G8R8A8;
1.218 +}
1.219 +
1.220 +static inline void
1.221 +GfxMatrixToCairoMatrix(const Matrix& mat, cairo_matrix_t& retval)
1.222 +{
1.223 + cairo_matrix_init(&retval, mat._11, mat._12, mat._21, mat._22, mat._31, mat._32);
1.224 +}
1.225 +
1.226 +static inline void
1.227 +SetCairoStrokeOptions(cairo_t* aCtx, const StrokeOptions& aStrokeOptions)
1.228 +{
1.229 + cairo_set_line_width(aCtx, aStrokeOptions.mLineWidth);
1.230 +
1.231 + cairo_set_miter_limit(aCtx, aStrokeOptions.mMiterLimit);
1.232 +
1.233 + if (aStrokeOptions.mDashPattern) {
1.234 + // Convert array of floats to array of doubles
1.235 + std::vector<double> dashes(aStrokeOptions.mDashLength);
1.236 + for (size_t i = 0; i < aStrokeOptions.mDashLength; ++i) {
1.237 + dashes[i] = aStrokeOptions.mDashPattern[i];
1.238 + }
1.239 + cairo_set_dash(aCtx, &dashes[0], aStrokeOptions.mDashLength,
1.240 + aStrokeOptions.mDashOffset);
1.241 + }
1.242 +
1.243 + cairo_set_line_join(aCtx, GfxLineJoinToCairoLineJoin(aStrokeOptions.mLineJoin));
1.244 +
1.245 + cairo_set_line_cap(aCtx, GfxLineCapToCairoLineCap(aStrokeOptions.mLineCap));
1.246 +}
1.247 +
1.248 +static inline cairo_fill_rule_t
1.249 +GfxFillRuleToCairoFillRule(FillRule rule)
1.250 +{
1.251 + switch (rule)
1.252 + {
1.253 + case FillRule::FILL_WINDING:
1.254 + return CAIRO_FILL_RULE_WINDING;
1.255 + case FillRule::FILL_EVEN_ODD:
1.256 + return CAIRO_FILL_RULE_EVEN_ODD;
1.257 + }
1.258 +
1.259 + return CAIRO_FILL_RULE_WINDING;
1.260 +}
1.261 +
1.262 +// RAII class for temporarily changing the cairo matrix transform. It will use
1.263 +// the given matrix transform while it is in scope. When it goes out of scope
1.264 +// it will put the cairo context back the way it was.
1.265 +
1.266 +class CairoTempMatrix
1.267 +{
1.268 +public:
1.269 + CairoTempMatrix(cairo_t* aCtx, const Matrix& aMatrix)
1.270 + : mCtx(aCtx)
1.271 + {
1.272 + cairo_get_matrix(aCtx, &mSaveMatrix);
1.273 + cairo_matrix_t matrix;
1.274 + GfxMatrixToCairoMatrix(aMatrix, matrix);
1.275 + cairo_set_matrix(aCtx, &matrix);
1.276 + }
1.277 +
1.278 + ~CairoTempMatrix()
1.279 + {
1.280 + cairo_set_matrix(mCtx, &mSaveMatrix);
1.281 + }
1.282 +
1.283 +private:
1.284 + cairo_t* mCtx;
1.285 + cairo_matrix_t mSaveMatrix;
1.286 +};
1.287 +
1.288 +}
1.289 +}
1.290 +
1.291 +#endif /* MOZILLA_GFX_HELPERSCAIRO_H_ */
