commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2013 Google Inc. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
| 8 | #include "GrOvalRenderer.h" |
| 9 | |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 10 | #include "GrEffect.h" |
| 11 | #include "gl/GrGLEffect.h" |
| 12 | #include "gl/GrGLSL.h" |
| 13 | #include "GrTBackendEffectFactory.h" |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 14 | |
| 15 | #include "GrDrawState.h" |
| 16 | #include "GrDrawTarget.h" |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 17 | #include "GrGpu.h" |
| 18 | |
| 19 | #include "SkRRect.h" |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 20 | #include "SkStrokeRec.h" |
| 21 | |
| 22 | SK_DEFINE_INST_COUNT(GrOvalRenderer) |
| 23 | |
| 24 | namespace { |
| 25 | |
| 26 | struct CircleVertex { |
commit-bot@chromium.org | 0a6cb60 | 2013-04-11 15:05:37 +0000 | [diff] [blame] | 27 | GrPoint fPos; |
| 28 | GrPoint fOffset; |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 29 | SkScalar fOuterRadius; |
| 30 | SkScalar fInnerRadius; |
| 31 | }; |
| 32 | |
| 33 | struct EllipseVertex { |
commit-bot@chromium.org | 0a6cb60 | 2013-04-11 15:05:37 +0000 | [diff] [blame] | 34 | GrPoint fPos; |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 35 | GrPoint fOffset; |
| 36 | GrPoint fOuterRadii; |
| 37 | GrPoint fInnerRadii; |
| 38 | }; |
| 39 | |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 40 | inline bool circle_stays_circle(const SkMatrix& m) { |
| 41 | return m.isSimilarity(); |
| 42 | } |
| 43 | |
| 44 | } |
| 45 | |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 46 | /////////////////////////////////////////////////////////////////////////////// |
| 47 | |
| 48 | /** |
| 49 | * The output of this effect is a modulation of the input color and coverage for a circle, |
commit-bot@chromium.org | 0a6cb60 | 2013-04-11 15:05:37 +0000 | [diff] [blame] | 50 | * specified as offset_x, offset_y (both from center point), outer radius and inner radius. |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 51 | */ |
| 52 | |
| 53 | class CircleEdgeEffect : public GrEffect { |
| 54 | public: |
| 55 | static GrEffectRef* Create(bool stroke) { |
bsalomon@google.com | d42aca3 | 2013-04-23 15:37:27 +0000 | [diff] [blame] | 56 | GR_CREATE_STATIC_EFFECT(gCircleStrokeEdge, CircleEdgeEffect, (true)); |
| 57 | GR_CREATE_STATIC_EFFECT(gCircleFillEdge, CircleEdgeEffect, (false)); |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 58 | |
| 59 | if (stroke) { |
bsalomon@google.com | d42aca3 | 2013-04-23 15:37:27 +0000 | [diff] [blame] | 60 | gCircleStrokeEdge->ref(); |
| 61 | return gCircleStrokeEdge; |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 62 | } else { |
bsalomon@google.com | d42aca3 | 2013-04-23 15:37:27 +0000 | [diff] [blame] | 63 | gCircleFillEdge->ref(); |
| 64 | return gCircleFillEdge; |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 65 | } |
| 66 | } |
| 67 | |
skia.committer@gmail.com | 041e2db | 2013-04-03 07:01:14 +0000 | [diff] [blame] | 68 | virtual void getConstantColorComponents(GrColor* color, |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 69 | uint32_t* validFlags) const SK_OVERRIDE { |
| 70 | *validFlags = 0; |
| 71 | } |
| 72 | |
| 73 | virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE { |
| 74 | return GrTBackendEffectFactory<CircleEdgeEffect>::getInstance(); |
| 75 | } |
| 76 | |
| 77 | virtual ~CircleEdgeEffect() {} |
| 78 | |
| 79 | static const char* Name() { return "CircleEdge"; } |
| 80 | |
| 81 | inline bool isStroked() const { return fStroke; } |
| 82 | |
| 83 | class GLEffect : public GrGLEffect { |
| 84 | public: |
| 85 | GLEffect(const GrBackendEffectFactory& factory, const GrDrawEffect&) |
| 86 | : INHERITED (factory) {} |
| 87 | |
| 88 | virtual void emitCode(GrGLShaderBuilder* builder, |
| 89 | const GrDrawEffect& drawEffect, |
| 90 | EffectKey key, |
| 91 | const char* outputColor, |
| 92 | const char* inputColor, |
| 93 | const TextureSamplerArray& samplers) SK_OVERRIDE { |
| 94 | const CircleEdgeEffect& circleEffect = drawEffect.castEffect<CircleEdgeEffect>(); |
| 95 | const char *vsName, *fsName; |
| 96 | builder->addVarying(kVec4f_GrSLType, "CircleEdge", &vsName, &fsName); |
| 97 | |
| 98 | const SkString* attrName = |
| 99 | builder->getEffectAttributeName(drawEffect.getVertexAttribIndices()[0]); |
| 100 | builder->vsCodeAppendf("\t%s = %s;\n", vsName, attrName->c_str()); |
| 101 | |
commit-bot@chromium.org | 0a6cb60 | 2013-04-11 15:05:37 +0000 | [diff] [blame] | 102 | builder->fsCodeAppendf("\tfloat d = length(%s.xy);\n", fsName); |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 103 | builder->fsCodeAppendf("\tfloat edgeAlpha = clamp(%s.z - d, 0.0, 1.0);\n", fsName); |
| 104 | if (circleEffect.isStroked()) { |
| 105 | builder->fsCodeAppendf("\tfloat innerAlpha = clamp(d - %s.w, 0.0, 1.0);\n", fsName); |
| 106 | builder->fsCodeAppend("\tedgeAlpha *= innerAlpha;\n"); |
| 107 | } |
commit-bot@chromium.org | 0a6cb60 | 2013-04-11 15:05:37 +0000 | [diff] [blame] | 108 | |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 109 | SkString modulate; |
bsalomon@google.com | 018f179 | 2013-04-18 19:36:09 +0000 | [diff] [blame] | 110 | GrGLSLModulatef<4>(&modulate, inputColor, "edgeAlpha"); |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 111 | builder->fsCodeAppendf("\t%s = %s;\n", outputColor, modulate.c_str()); |
| 112 | } |
| 113 | |
| 114 | static inline EffectKey GenKey(const GrDrawEffect& drawEffect, const GrGLCaps&) { |
| 115 | const CircleEdgeEffect& circleEffect = drawEffect.castEffect<CircleEdgeEffect>(); |
| 116 | |
| 117 | return circleEffect.isStroked() ? 0x1 : 0x0; |
| 118 | } |
| 119 | |
| 120 | virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE {} |
| 121 | |
| 122 | private: |
| 123 | typedef GrGLEffect INHERITED; |
| 124 | }; |
| 125 | |
| 126 | |
| 127 | private: |
| 128 | CircleEdgeEffect(bool stroke) : GrEffect() { |
| 129 | this->addVertexAttrib(kVec4f_GrSLType); |
| 130 | fStroke = stroke; |
| 131 | } |
| 132 | |
| 133 | virtual bool onIsEqual(const GrEffect& other) const SK_OVERRIDE { |
| 134 | const CircleEdgeEffect& cee = CastEffect<CircleEdgeEffect>(other); |
| 135 | return cee.fStroke == fStroke; |
| 136 | } |
| 137 | |
| 138 | bool fStroke; |
| 139 | |
| 140 | GR_DECLARE_EFFECT_TEST; |
| 141 | |
| 142 | typedef GrEffect INHERITED; |
| 143 | }; |
| 144 | |
| 145 | GR_DEFINE_EFFECT_TEST(CircleEdgeEffect); |
| 146 | |
| 147 | GrEffectRef* CircleEdgeEffect::TestCreate(SkMWCRandom* random, |
| 148 | GrContext* context, |
| 149 | const GrDrawTargetCaps&, |
| 150 | GrTexture* textures[]) { |
| 151 | return CircleEdgeEffect::Create(random->nextBool()); |
| 152 | } |
| 153 | |
| 154 | /////////////////////////////////////////////////////////////////////////////// |
| 155 | |
| 156 | /** |
| 157 | * The output of this effect is a modulation of the input color and coverage for an axis-aligned |
skia.committer@gmail.com | 8be02fc | 2013-05-17 07:01:11 +0000 | [diff] [blame] | 158 | * ellipse, specified as a 2D offset from center, and the reciprocals of the outer and inner radii, |
| 159 | * in both x and y directions. |
| 160 | * |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 161 | * We are using an implicit function of x^2/a^2 + y^2/b^2 - 1 = 0. |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 162 | */ |
| 163 | |
| 164 | class EllipseEdgeEffect : public GrEffect { |
| 165 | public: |
| 166 | static GrEffectRef* Create(bool stroke) { |
bsalomon@google.com | d42aca3 | 2013-04-23 15:37:27 +0000 | [diff] [blame] | 167 | GR_CREATE_STATIC_EFFECT(gEllipseStrokeEdge, EllipseEdgeEffect, (true)); |
| 168 | GR_CREATE_STATIC_EFFECT(gEllipseFillEdge, EllipseEdgeEffect, (false)); |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 169 | |
| 170 | if (stroke) { |
bsalomon@google.com | d42aca3 | 2013-04-23 15:37:27 +0000 | [diff] [blame] | 171 | gEllipseStrokeEdge->ref(); |
| 172 | return gEllipseStrokeEdge; |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 173 | } else { |
bsalomon@google.com | d42aca3 | 2013-04-23 15:37:27 +0000 | [diff] [blame] | 174 | gEllipseFillEdge->ref(); |
| 175 | return gEllipseFillEdge; |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 176 | } |
| 177 | } |
| 178 | |
skia.committer@gmail.com | 041e2db | 2013-04-03 07:01:14 +0000 | [diff] [blame] | 179 | virtual void getConstantColorComponents(GrColor* color, |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 180 | uint32_t* validFlags) const SK_OVERRIDE { |
| 181 | *validFlags = 0; |
| 182 | } |
| 183 | |
| 184 | virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE { |
| 185 | return GrTBackendEffectFactory<EllipseEdgeEffect>::getInstance(); |
| 186 | } |
| 187 | |
| 188 | virtual ~EllipseEdgeEffect() {} |
| 189 | |
| 190 | static const char* Name() { return "EllipseEdge"; } |
| 191 | |
| 192 | inline bool isStroked() const { return fStroke; } |
| 193 | |
| 194 | class GLEffect : public GrGLEffect { |
| 195 | public: |
| 196 | GLEffect(const GrBackendEffectFactory& factory, const GrDrawEffect&) |
| 197 | : INHERITED (factory) {} |
| 198 | |
| 199 | virtual void emitCode(GrGLShaderBuilder* builder, |
| 200 | const GrDrawEffect& drawEffect, |
| 201 | EffectKey key, |
| 202 | const char* outputColor, |
| 203 | const char* inputColor, |
| 204 | const TextureSamplerArray& samplers) SK_OVERRIDE { |
| 205 | const EllipseEdgeEffect& ellipseEffect = drawEffect.castEffect<EllipseEdgeEffect>(); |
| 206 | |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 207 | const char *vsOffsetName, *fsOffsetName; |
commit-bot@chromium.org | 0a6cb60 | 2013-04-11 15:05:37 +0000 | [diff] [blame] | 208 | const char *vsRadiiName, *fsRadiiName; |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 209 | |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 210 | builder->addVarying(kVec2f_GrSLType, "EllipseOffsets", &vsOffsetName, &fsOffsetName); |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 211 | const SkString* attr0Name = |
| 212 | builder->getEffectAttributeName(drawEffect.getVertexAttribIndices()[0]); |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 213 | builder->vsCodeAppendf("\t%s = %s;\n", vsOffsetName, attr0Name->c_str()); |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 214 | |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 215 | builder->addVarying(kVec4f_GrSLType, "EllipseRadii", &vsRadiiName, &fsRadiiName); |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 216 | const SkString* attr1Name = |
| 217 | builder->getEffectAttributeName(drawEffect.getVertexAttribIndices()[1]); |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 218 | builder->vsCodeAppendf("\t%s = %s;\n", vsRadiiName, attr1Name->c_str()); |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 219 | |
skia.committer@gmail.com | 8be02fc | 2013-05-17 07:01:11 +0000 | [diff] [blame] | 220 | // for outer curve |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 221 | builder->fsCodeAppendf("\tvec2 scaledOffset = %s*%s.xy;\n", fsOffsetName, fsRadiiName); |
| 222 | builder->fsCodeAppend("\tfloat test = dot(scaledOffset, scaledOffset) - 1.0;\n"); |
| 223 | builder->fsCodeAppendf("\tvec2 grad = 2.0*scaledOffset*%s.xy;\n", fsRadiiName); |
jvanverth@google.com | d1b5b14 | 2013-07-02 14:46:03 +0000 | [diff] [blame^] | 224 | builder->fsCodeAppend("\tfloat grad_dot = dot(grad, grad);\n"); |
| 225 | // we need to clamp the length^2 of the gradiant vector to a non-zero value, because |
| 226 | // on the Nexus 4 the undefined result of inversesqrt(0) drops out an entire tile |
| 227 | // TODO: restrict this to Adreno-only |
| 228 | builder->fsCodeAppend("\tgrad_dot = max(grad_dot, 1.0e-4);\n"); |
| 229 | builder->fsCodeAppend("\tfloat invlen = inversesqrt(grad_dot);\n"); |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 230 | builder->fsCodeAppend("\tfloat edgeAlpha = clamp(0.5-test*invlen, 0.0, 1.0);\n"); |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 231 | |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 232 | // for inner curve |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 233 | if (ellipseEffect.isStroked()) { |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 234 | builder->fsCodeAppendf("\tscaledOffset = %s*%s.zw;\n", fsOffsetName, fsRadiiName); |
| 235 | builder->fsCodeAppend("\ttest = dot(scaledOffset, scaledOffset) - 1.0;\n"); |
| 236 | builder->fsCodeAppendf("\tgrad = 2.0*scaledOffset*%s.zw;\n", fsRadiiName); |
| 237 | builder->fsCodeAppend("\tinvlen = inversesqrt(dot(grad, grad));\n"); |
| 238 | builder->fsCodeAppend("\tedgeAlpha *= clamp(0.5+test*invlen, 0.0, 1.0);\n"); |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 239 | } |
| 240 | |
| 241 | SkString modulate; |
bsalomon@google.com | 018f179 | 2013-04-18 19:36:09 +0000 | [diff] [blame] | 242 | GrGLSLModulatef<4>(&modulate, inputColor, "edgeAlpha"); |
skia.committer@gmail.com | 041e2db | 2013-04-03 07:01:14 +0000 | [diff] [blame] | 243 | builder->fsCodeAppendf("\t%s = %s;\n", outputColor, modulate.c_str()); |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 244 | } |
| 245 | |
| 246 | static inline EffectKey GenKey(const GrDrawEffect& drawEffect, const GrGLCaps&) { |
| 247 | const EllipseEdgeEffect& ellipseEffect = drawEffect.castEffect<EllipseEdgeEffect>(); |
| 248 | |
| 249 | return ellipseEffect.isStroked() ? 0x1 : 0x0; |
| 250 | } |
| 251 | |
| 252 | virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE { |
| 253 | } |
| 254 | |
| 255 | private: |
| 256 | typedef GrGLEffect INHERITED; |
| 257 | }; |
| 258 | |
| 259 | private: |
| 260 | EllipseEdgeEffect(bool stroke) : GrEffect() { |
| 261 | this->addVertexAttrib(kVec2f_GrSLType); |
| 262 | this->addVertexAttrib(kVec4f_GrSLType); |
| 263 | fStroke = stroke; |
| 264 | } |
| 265 | |
| 266 | virtual bool onIsEqual(const GrEffect& other) const SK_OVERRIDE { |
| 267 | const EllipseEdgeEffect& eee = CastEffect<EllipseEdgeEffect>(other); |
| 268 | return eee.fStroke == fStroke; |
| 269 | } |
| 270 | |
| 271 | bool fStroke; |
| 272 | |
| 273 | GR_DECLARE_EFFECT_TEST; |
| 274 | |
| 275 | typedef GrEffect INHERITED; |
| 276 | }; |
| 277 | |
| 278 | GR_DEFINE_EFFECT_TEST(EllipseEdgeEffect); |
| 279 | |
| 280 | GrEffectRef* EllipseEdgeEffect::TestCreate(SkMWCRandom* random, |
| 281 | GrContext* context, |
| 282 | const GrDrawTargetCaps&, |
| 283 | GrTexture* textures[]) { |
| 284 | return EllipseEdgeEffect::Create(random->nextBool()); |
| 285 | } |
| 286 | |
| 287 | /////////////////////////////////////////////////////////////////////////////// |
| 288 | |
commit-bot@chromium.org | 37d883d | 2013-05-02 13:11:22 +0000 | [diff] [blame] | 289 | bool GrOvalRenderer::drawOval(GrDrawTarget* target, const GrContext* context, bool useAA, |
| 290 | const GrRect& oval, const SkStrokeRec& stroke) |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 291 | { |
commit-bot@chromium.org | 37d883d | 2013-05-02 13:11:22 +0000 | [diff] [blame] | 292 | if (!useAA) { |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 293 | return false; |
| 294 | } |
| 295 | |
| 296 | const SkMatrix& vm = context->getMatrix(); |
| 297 | |
skia.committer@gmail.com | 7e32851 | 2013-03-23 07:01:28 +0000 | [diff] [blame] | 298 | // we can draw circles |
| 299 | if (SkScalarNearlyEqual(oval.width(), oval.height()) |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 300 | && circle_stays_circle(vm)) { |
commit-bot@chromium.org | 37d883d | 2013-05-02 13:11:22 +0000 | [diff] [blame] | 301 | this->drawCircle(target, useAA, oval, stroke); |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 302 | |
| 303 | // and axis-aligned ellipses only |
| 304 | } else if (vm.rectStaysRect()) { |
commit-bot@chromium.org | 37d883d | 2013-05-02 13:11:22 +0000 | [diff] [blame] | 305 | return this->drawEllipse(target, useAA, oval, stroke); |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 306 | |
| 307 | } else { |
| 308 | return false; |
| 309 | } |
| 310 | |
| 311 | return true; |
| 312 | } |
| 313 | |
robertphillips@google.com | 4290330 | 2013-04-20 12:26:07 +0000 | [diff] [blame] | 314 | namespace { |
| 315 | |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 316 | /////////////////////////////////////////////////////////////////////////////// |
| 317 | |
robertphillips@google.com | 4290330 | 2013-04-20 12:26:07 +0000 | [diff] [blame] | 318 | // position + edge |
| 319 | extern const GrVertexAttrib gCircleVertexAttribs[] = { |
| 320 | {kVec2f_GrVertexAttribType, 0, kPosition_GrVertexAttribBinding}, |
| 321 | {kVec4f_GrVertexAttribType, sizeof(GrPoint), kEffect_GrVertexAttribBinding} |
| 322 | }; |
| 323 | |
| 324 | }; |
| 325 | |
skia.committer@gmail.com | 7e32851 | 2013-03-23 07:01:28 +0000 | [diff] [blame] | 326 | void GrOvalRenderer::drawCircle(GrDrawTarget* target, |
commit-bot@chromium.org | 37d883d | 2013-05-02 13:11:22 +0000 | [diff] [blame] | 327 | bool useAA, |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 328 | const GrRect& circle, |
| 329 | const SkStrokeRec& stroke) |
| 330 | { |
| 331 | GrDrawState* drawState = target->drawState(); |
| 332 | |
| 333 | const SkMatrix& vm = drawState->getViewMatrix(); |
| 334 | GrPoint center = GrPoint::Make(circle.centerX(), circle.centerY()); |
| 335 | vm.mapPoints(¢er, 1); |
| 336 | SkScalar radius = vm.mapRadius(SkScalarHalf(circle.width())); |
| 337 | SkScalar strokeWidth = vm.mapRadius(stroke.getWidth()); |
| 338 | |
bsalomon@google.com | 137f134 | 2013-05-29 21:27:53 +0000 | [diff] [blame] | 339 | GrDrawState::AutoViewMatrixRestore avmr; |
| 340 | if (!avmr.setIdentity(drawState)) { |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 341 | return; |
| 342 | } |
| 343 | |
robertphillips@google.com | 4290330 | 2013-04-20 12:26:07 +0000 | [diff] [blame] | 344 | drawState->setVertexAttribs<gCircleVertexAttribs>(SK_ARRAY_COUNT(gCircleVertexAttribs)); |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 345 | GrAssert(sizeof(CircleVertex) == drawState->getVertexSize()); |
| 346 | |
| 347 | GrDrawTarget::AutoReleaseGeometry geo(target, 4, 0); |
| 348 | if (!geo.succeeded()) { |
| 349 | GrPrintf("Failed to get space for vertices!\n"); |
| 350 | return; |
| 351 | } |
| 352 | |
| 353 | CircleVertex* verts = reinterpret_cast<CircleVertex*>(geo.vertices()); |
| 354 | |
| 355 | SkStrokeRec::Style style = stroke.getStyle(); |
| 356 | bool isStroked = (SkStrokeRec::kStroke_Style == style || SkStrokeRec::kHairline_Style == style); |
skia.committer@gmail.com | 7e32851 | 2013-03-23 07:01:28 +0000 | [diff] [blame] | 357 | |
commit-bot@chromium.org | 90c240a | 2013-04-02 17:57:21 +0000 | [diff] [blame] | 358 | GrEffectRef* effect = CircleEdgeEffect::Create(isStroked); |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 359 | static const int kCircleEdgeAttrIndex = 1; |
bsalomon@google.com | eb6879f | 2013-06-13 19:34:18 +0000 | [diff] [blame] | 360 | drawState->addCoverageEffect(effect, kCircleEdgeAttrIndex)->unref(); |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 361 | |
| 362 | SkScalar innerRadius = 0.0f; |
| 363 | SkScalar outerRadius = radius; |
| 364 | SkScalar halfWidth = 0; |
| 365 | if (style != SkStrokeRec::kFill_Style) { |
| 366 | if (SkScalarNearlyZero(strokeWidth)) { |
| 367 | halfWidth = SK_ScalarHalf; |
| 368 | } else { |
| 369 | halfWidth = SkScalarHalf(strokeWidth); |
| 370 | } |
| 371 | |
| 372 | outerRadius += halfWidth; |
| 373 | if (isStroked) { |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 374 | innerRadius = radius - halfWidth; |
| 375 | isStroked = (innerRadius > 0); |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 376 | } |
| 377 | } |
| 378 | |
bsalomon@google.com | 58e30fe | 2013-04-01 19:01:20 +0000 | [diff] [blame] | 379 | // The radii are outset for two reasons. First, it allows the shader to simply perform |
| 380 | // clamp(distance-to-center - radius, 0, 1). Second, the outer radius is used to compute the |
| 381 | // verts of the bounding box that is rendered and the outset ensures the box will cover all |
| 382 | // pixels partially covered by the circle. |
| 383 | outerRadius += SK_ScalarHalf; |
| 384 | innerRadius -= SK_ScalarHalf; |
| 385 | |
commit-bot@chromium.org | bb5c465 | 2013-04-01 12:49:31 +0000 | [diff] [blame] | 386 | SkRect bounds = SkRect::MakeLTRB( |
bsalomon@google.com | 58e30fe | 2013-04-01 19:01:20 +0000 | [diff] [blame] | 387 | center.fX - outerRadius, |
| 388 | center.fY - outerRadius, |
| 389 | center.fX + outerRadius, |
| 390 | center.fY + outerRadius |
commit-bot@chromium.org | bb5c465 | 2013-04-01 12:49:31 +0000 | [diff] [blame] | 391 | ); |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 392 | |
commit-bot@chromium.org | bb5c465 | 2013-04-01 12:49:31 +0000 | [diff] [blame] | 393 | verts[0].fPos = SkPoint::Make(bounds.fLeft, bounds.fTop); |
commit-bot@chromium.org | 0a6cb60 | 2013-04-11 15:05:37 +0000 | [diff] [blame] | 394 | verts[0].fOffset = SkPoint::Make(-outerRadius, -outerRadius); |
| 395 | verts[0].fOuterRadius = outerRadius; |
| 396 | verts[0].fInnerRadius = innerRadius; |
| 397 | |
commit-bot@chromium.org | bb5c465 | 2013-04-01 12:49:31 +0000 | [diff] [blame] | 398 | verts[1].fPos = SkPoint::Make(bounds.fRight, bounds.fTop); |
skia.committer@gmail.com | 4674676 | 2013-04-12 07:01:51 +0000 | [diff] [blame] | 399 | verts[1].fOffset = SkPoint::Make(outerRadius, -outerRadius); |
commit-bot@chromium.org | 0a6cb60 | 2013-04-11 15:05:37 +0000 | [diff] [blame] | 400 | verts[1].fOuterRadius = outerRadius; |
| 401 | verts[1].fInnerRadius = innerRadius; |
| 402 | |
commit-bot@chromium.org | bb5c465 | 2013-04-01 12:49:31 +0000 | [diff] [blame] | 403 | verts[2].fPos = SkPoint::Make(bounds.fLeft, bounds.fBottom); |
commit-bot@chromium.org | 0a6cb60 | 2013-04-11 15:05:37 +0000 | [diff] [blame] | 404 | verts[2].fOffset = SkPoint::Make(-outerRadius, outerRadius); |
| 405 | verts[2].fOuterRadius = outerRadius; |
| 406 | verts[2].fInnerRadius = innerRadius; |
| 407 | |
commit-bot@chromium.org | bb5c465 | 2013-04-01 12:49:31 +0000 | [diff] [blame] | 408 | verts[3].fPos = SkPoint::Make(bounds.fRight, bounds.fBottom); |
commit-bot@chromium.org | 0a6cb60 | 2013-04-11 15:05:37 +0000 | [diff] [blame] | 409 | verts[3].fOffset = SkPoint::Make(outerRadius, outerRadius); |
| 410 | verts[3].fOuterRadius = outerRadius; |
| 411 | verts[3].fInnerRadius = innerRadius; |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 412 | |
commit-bot@chromium.org | bb5c465 | 2013-04-01 12:49:31 +0000 | [diff] [blame] | 413 | target->drawNonIndexed(kTriangleStrip_GrPrimitiveType, 0, 4, &bounds); |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 414 | } |
| 415 | |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 416 | /////////////////////////////////////////////////////////////////////////////// |
| 417 | |
robertphillips@google.com | 4290330 | 2013-04-20 12:26:07 +0000 | [diff] [blame] | 418 | namespace { |
| 419 | |
| 420 | // position + edge |
| 421 | extern const GrVertexAttrib gEllipseVertexAttribs[] = { |
| 422 | {kVec2f_GrVertexAttribType, 0, kPosition_GrVertexAttribBinding}, |
| 423 | {kVec2f_GrVertexAttribType, sizeof(GrPoint), kEffect_GrVertexAttribBinding}, |
| 424 | {kVec4f_GrVertexAttribType, 2*sizeof(GrPoint), kEffect_GrVertexAttribBinding} |
| 425 | }; |
| 426 | |
| 427 | }; |
| 428 | |
jvanverth@google.com | c4f2eca | 2013-04-16 12:30:35 +0000 | [diff] [blame] | 429 | bool GrOvalRenderer::drawEllipse(GrDrawTarget* target, |
commit-bot@chromium.org | 37d883d | 2013-05-02 13:11:22 +0000 | [diff] [blame] | 430 | bool useAA, |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 431 | const GrRect& ellipse, |
| 432 | const SkStrokeRec& stroke) |
| 433 | { |
| 434 | GrDrawState* drawState = target->drawState(); |
| 435 | #ifdef SK_DEBUG |
| 436 | { |
| 437 | // we should have checked for this previously |
| 438 | bool isAxisAlignedEllipse = drawState->getViewMatrix().rectStaysRect(); |
commit-bot@chromium.org | 37d883d | 2013-05-02 13:11:22 +0000 | [diff] [blame] | 439 | SkASSERT(useAA && isAxisAlignedEllipse); |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 440 | } |
| 441 | #endif |
| 442 | |
commit-bot@chromium.org | 0c88828 | 2013-04-19 19:01:45 +0000 | [diff] [blame] | 443 | // do any matrix crunching before we reset the draw state for device coords |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 444 | const SkMatrix& vm = drawState->getViewMatrix(); |
| 445 | GrPoint center = GrPoint::Make(ellipse.centerX(), ellipse.centerY()); |
| 446 | vm.mapPoints(¢er, 1); |
commit-bot@chromium.org | 0c88828 | 2013-04-19 19:01:45 +0000 | [diff] [blame] | 447 | SkScalar ellipseXRadius = SkScalarHalf(ellipse.width()); |
| 448 | SkScalar ellipseYRadius = SkScalarHalf(ellipse.height()); |
skia.committer@gmail.com | 64b682c | 2013-04-20 07:01:07 +0000 | [diff] [blame] | 449 | SkScalar xRadius = SkScalarAbs(vm[SkMatrix::kMScaleX]*ellipseXRadius + |
commit-bot@chromium.org | 0c88828 | 2013-04-19 19:01:45 +0000 | [diff] [blame] | 450 | vm[SkMatrix::kMSkewY]*ellipseYRadius); |
skia.committer@gmail.com | 64b682c | 2013-04-20 07:01:07 +0000 | [diff] [blame] | 451 | SkScalar yRadius = SkScalarAbs(vm[SkMatrix::kMSkewX]*ellipseXRadius + |
commit-bot@chromium.org | 0c88828 | 2013-04-19 19:01:45 +0000 | [diff] [blame] | 452 | vm[SkMatrix::kMScaleY]*ellipseYRadius); |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 453 | |
commit-bot@chromium.org | 0c88828 | 2013-04-19 19:01:45 +0000 | [diff] [blame] | 454 | // do (potentially) anisotropic mapping of stroke |
| 455 | SkVector scaledStroke; |
| 456 | SkScalar strokeWidth = stroke.getWidth(); |
| 457 | scaledStroke.fX = SkScalarAbs(strokeWidth*(vm[SkMatrix::kMScaleX] + vm[SkMatrix::kMSkewY])); |
| 458 | scaledStroke.fY = SkScalarAbs(strokeWidth*(vm[SkMatrix::kMSkewX] + vm[SkMatrix::kMScaleY])); |
| 459 | |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 460 | SkStrokeRec::Style style = stroke.getStyle(); |
| 461 | bool isStroked = (SkStrokeRec::kStroke_Style == style || SkStrokeRec::kHairline_Style == style); |
| 462 | |
| 463 | SkScalar innerXRadius = 0.0f; |
| 464 | SkScalar innerYRadius = 0.0f; |
| 465 | if (SkStrokeRec::kFill_Style != style) { |
| 466 | if (SkScalarNearlyZero(scaledStroke.length())) { |
| 467 | scaledStroke.set(SK_ScalarHalf, SK_ScalarHalf); |
| 468 | } else { |
| 469 | scaledStroke.scale(SK_ScalarHalf); |
| 470 | } |
| 471 | |
| 472 | // we only handle thick strokes for near-circular ellipses |
| 473 | if (scaledStroke.length() > SK_ScalarHalf && |
| 474 | (SK_ScalarHalf*xRadius > yRadius || SK_ScalarHalf*yRadius > xRadius)) { |
| 475 | return false; |
| 476 | } |
| 477 | |
| 478 | // we don't handle it if curvature of the stroke is less than curvature of the ellipse |
| 479 | if (scaledStroke.fX*(yRadius*yRadius) < (scaledStroke.fY*scaledStroke.fY)*xRadius || |
| 480 | scaledStroke.fY*(xRadius*xRadius) < (scaledStroke.fX*scaledStroke.fX)*yRadius) { |
| 481 | return false; |
| 482 | } |
| 483 | |
| 484 | // this is legit only if scale & translation (which should be the case at the moment) |
| 485 | if (isStroked) { |
| 486 | innerXRadius = xRadius - scaledStroke.fX; |
| 487 | innerYRadius = yRadius - scaledStroke.fY; |
| 488 | isStroked = (innerXRadius > 0 && innerYRadius > 0); |
| 489 | } |
| 490 | |
| 491 | xRadius += scaledStroke.fX; |
| 492 | yRadius += scaledStroke.fY; |
| 493 | } |
| 494 | |
bsalomon@google.com | 137f134 | 2013-05-29 21:27:53 +0000 | [diff] [blame] | 495 | GrDrawState::AutoViewMatrixRestore avmr; |
| 496 | if (!avmr.setIdentity(drawState)) { |
jvanverth@google.com | c4f2eca | 2013-04-16 12:30:35 +0000 | [diff] [blame] | 497 | return false; |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 498 | } |
| 499 | |
robertphillips@google.com | 4290330 | 2013-04-20 12:26:07 +0000 | [diff] [blame] | 500 | drawState->setVertexAttribs<gEllipseVertexAttribs>(SK_ARRAY_COUNT(gEllipseVertexAttribs)); |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 501 | GrAssert(sizeof(EllipseVertex) == drawState->getVertexSize()); |
| 502 | |
| 503 | GrDrawTarget::AutoReleaseGeometry geo(target, 4, 0); |
| 504 | if (!geo.succeeded()) { |
| 505 | GrPrintf("Failed to get space for vertices!\n"); |
jvanverth@google.com | c4f2eca | 2013-04-16 12:30:35 +0000 | [diff] [blame] | 506 | return false; |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 507 | } |
| 508 | |
| 509 | EllipseVertex* verts = reinterpret_cast<EllipseVertex*>(geo.vertices()); |
| 510 | |
jvanverth@google.com | e364741 | 2013-05-08 15:31:43 +0000 | [diff] [blame] | 511 | GrEffectRef* effect = EllipseEdgeEffect::Create(isStroked); |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 512 | |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 513 | static const int kEllipseCenterAttrIndex = 1; |
| 514 | static const int kEllipseEdgeAttrIndex = 2; |
bsalomon@google.com | eb6879f | 2013-06-13 19:34:18 +0000 | [diff] [blame] | 515 | drawState->addCoverageEffect(effect, kEllipseCenterAttrIndex, kEllipseEdgeAttrIndex)->unref(); |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 516 | |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 517 | // Compute the reciprocals of the radii here to save time in the shader |
| 518 | SkScalar xRadRecip = SkScalarInvert(xRadius); |
| 519 | SkScalar yRadRecip = SkScalarInvert(yRadius); |
| 520 | SkScalar xInnerRadRecip = SkScalarInvert(innerXRadius); |
| 521 | SkScalar yInnerRadRecip = SkScalarInvert(innerYRadius); |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 522 | |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 523 | // We've extended the outer x radius out half a pixel to antialias. |
commit-bot@chromium.org | 0a6cb60 | 2013-04-11 15:05:37 +0000 | [diff] [blame] | 524 | // This will also expand the rect so all the pixels will be captured. |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 525 | // TODO: Consider if we should use sqrt(2)/2 instead |
commit-bot@chromium.org | 0a6cb60 | 2013-04-11 15:05:37 +0000 | [diff] [blame] | 526 | xRadius += SK_ScalarHalf; |
| 527 | yRadius += SK_ScalarHalf; |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 528 | |
commit-bot@chromium.org | 0a6cb60 | 2013-04-11 15:05:37 +0000 | [diff] [blame] | 529 | SkRect bounds = SkRect::MakeLTRB( |
| 530 | center.fX - xRadius, |
| 531 | center.fY - yRadius, |
| 532 | center.fX + xRadius, |
| 533 | center.fY + yRadius |
| 534 | ); |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 535 | |
commit-bot@chromium.org | 0a6cb60 | 2013-04-11 15:05:37 +0000 | [diff] [blame] | 536 | verts[0].fPos = SkPoint::Make(bounds.fLeft, bounds.fTop); |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 537 | verts[0].fOffset = SkPoint::Make(-xRadius, -yRadius); |
| 538 | verts[0].fOuterRadii = SkPoint::Make(xRadRecip, yRadRecip); |
| 539 | verts[0].fInnerRadii = SkPoint::Make(xInnerRadRecip, yInnerRadRecip); |
commit-bot@chromium.org | 0a6cb60 | 2013-04-11 15:05:37 +0000 | [diff] [blame] | 540 | |
| 541 | verts[1].fPos = SkPoint::Make(bounds.fRight, bounds.fTop); |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 542 | verts[1].fOffset = SkPoint::Make(xRadius, -yRadius); |
| 543 | verts[1].fOuterRadii = SkPoint::Make(xRadRecip, yRadRecip); |
| 544 | verts[1].fInnerRadii = SkPoint::Make(xInnerRadRecip, yInnerRadRecip); |
commit-bot@chromium.org | 0a6cb60 | 2013-04-11 15:05:37 +0000 | [diff] [blame] | 545 | |
| 546 | verts[2].fPos = SkPoint::Make(bounds.fLeft, bounds.fBottom); |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 547 | verts[2].fOffset = SkPoint::Make(-xRadius, yRadius); |
| 548 | verts[2].fOuterRadii = SkPoint::Make(xRadRecip, yRadRecip); |
| 549 | verts[2].fInnerRadii = SkPoint::Make(xInnerRadRecip, yInnerRadRecip); |
commit-bot@chromium.org | 0a6cb60 | 2013-04-11 15:05:37 +0000 | [diff] [blame] | 550 | |
| 551 | verts[3].fPos = SkPoint::Make(bounds.fRight, bounds.fBottom); |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 552 | verts[3].fOffset = SkPoint::Make(xRadius, yRadius); |
| 553 | verts[3].fOuterRadii = SkPoint::Make(xRadRecip, yRadRecip); |
| 554 | verts[3].fInnerRadii = SkPoint::Make(xInnerRadRecip, yInnerRadRecip); |
skia.committer@gmail.com | 4674676 | 2013-04-12 07:01:51 +0000 | [diff] [blame] | 555 | |
commit-bot@chromium.org | 0a6cb60 | 2013-04-11 15:05:37 +0000 | [diff] [blame] | 556 | target->drawNonIndexed(kTriangleStrip_GrPrimitiveType, 0, 4, &bounds); |
jvanverth@google.com | c4f2eca | 2013-04-16 12:30:35 +0000 | [diff] [blame] | 557 | |
| 558 | return true; |
commit-bot@chromium.org | 8131283 | 2013-03-22 18:34:09 +0000 | [diff] [blame] | 559 | } |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 560 | |
| 561 | /////////////////////////////////////////////////////////////////////////////// |
| 562 | |
| 563 | static const uint16_t gRRectIndices[] = { |
| 564 | // corners |
| 565 | 0, 1, 5, 0, 5, 4, |
| 566 | 2, 3, 7, 2, 7, 6, |
| 567 | 8, 9, 13, 8, 13, 12, |
| 568 | 10, 11, 15, 10, 15, 14, |
skia.committer@gmail.com | 2cf444f | 2013-04-26 07:00:58 +0000 | [diff] [blame] | 569 | |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 570 | // edges |
| 571 | 1, 2, 6, 1, 6, 5, |
| 572 | 4, 5, 9, 4, 9, 8, |
| 573 | 6, 7, 11, 6, 11, 10, |
| 574 | 9, 10, 14, 9, 14, 13, |
skia.committer@gmail.com | 2cf444f | 2013-04-26 07:00:58 +0000 | [diff] [blame] | 575 | |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 576 | // center |
| 577 | // we place this at the end so that we can ignore these indices when rendering stroke-only |
| 578 | 5, 6, 10, 5, 10, 9 |
| 579 | }; |
| 580 | |
| 581 | |
| 582 | GrIndexBuffer* GrOvalRenderer::rRectIndexBuffer(GrGpu* gpu) { |
| 583 | if (NULL == fRRectIndexBuffer) { |
| 584 | fRRectIndexBuffer = |
| 585 | gpu->createIndexBuffer(sizeof(gRRectIndices), false); |
| 586 | if (NULL != fRRectIndexBuffer) { |
| 587 | #if GR_DEBUG |
| 588 | bool updated = |
| 589 | #endif |
| 590 | fRRectIndexBuffer->updateData(gRRectIndices, |
| 591 | sizeof(gRRectIndices)); |
| 592 | GR_DEBUGASSERT(updated); |
| 593 | } |
| 594 | } |
| 595 | return fRRectIndexBuffer; |
| 596 | } |
| 597 | |
skia.committer@gmail.com | 2fd42c4 | 2013-05-03 07:01:00 +0000 | [diff] [blame] | 598 | bool GrOvalRenderer::drawSimpleRRect(GrDrawTarget* target, GrContext* context, bool useAA, |
commit-bot@chromium.org | 37d883d | 2013-05-02 13:11:22 +0000 | [diff] [blame] | 599 | const SkRRect& rrect, const SkStrokeRec& stroke) |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 600 | { |
commit-bot@chromium.org | 37d883d | 2013-05-02 13:11:22 +0000 | [diff] [blame] | 601 | // only anti-aliased rrects for now |
| 602 | if (!useAA) { |
| 603 | return false; |
| 604 | } |
| 605 | |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 606 | const SkMatrix& vm = context->getMatrix(); |
| 607 | #ifdef SK_DEBUG |
| 608 | { |
| 609 | // we should have checked for this previously |
commit-bot@chromium.org | 37d883d | 2013-05-02 13:11:22 +0000 | [diff] [blame] | 610 | SkASSERT(useAA && vm.rectStaysRect() && rrect.isSimple()); |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 611 | } |
| 612 | #endif |
| 613 | |
| 614 | // do any matrix crunching before we reset the draw state for device coords |
| 615 | const SkRect& rrectBounds = rrect.getBounds(); |
| 616 | SkRect bounds; |
| 617 | vm.mapRect(&bounds, rrectBounds); |
| 618 | |
| 619 | SkVector radii = rrect.getSimpleRadii(); |
skia.committer@gmail.com | 2cf444f | 2013-04-26 07:00:58 +0000 | [diff] [blame] | 620 | SkScalar xRadius = SkScalarAbs(vm[SkMatrix::kMScaleX]*radii.fX + |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 621 | vm[SkMatrix::kMSkewY]*radii.fY); |
skia.committer@gmail.com | 2cf444f | 2013-04-26 07:00:58 +0000 | [diff] [blame] | 622 | SkScalar yRadius = SkScalarAbs(vm[SkMatrix::kMSkewX]*radii.fX + |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 623 | vm[SkMatrix::kMScaleY]*radii.fY); |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 624 | |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 625 | // if hairline stroke is greater than radius, we don't handle that right now |
| 626 | SkStrokeRec::Style style = stroke.getStyle(); |
| 627 | if (SkStrokeRec::kHairline_Style == style && |
| 628 | (SK_ScalarHalf >= xRadius || SK_ScalarHalf >= yRadius)) { |
| 629 | return false; |
| 630 | } |
| 631 | |
| 632 | // do (potentially) anisotropic mapping of stroke |
| 633 | SkVector scaledStroke; |
| 634 | SkScalar strokeWidth = stroke.getWidth(); |
| 635 | scaledStroke.fX = SkScalarAbs(strokeWidth*(vm[SkMatrix::kMScaleX] + vm[SkMatrix::kMSkewY])); |
| 636 | scaledStroke.fY = SkScalarAbs(strokeWidth*(vm[SkMatrix::kMSkewX] + vm[SkMatrix::kMScaleY])); |
| 637 | |
| 638 | // if half of strokewidth is greater than radius, we don't handle that right now |
| 639 | if (SK_ScalarHalf*scaledStroke.fX >= xRadius || SK_ScalarHalf*scaledStroke.fY >= yRadius) { |
| 640 | return false; |
| 641 | } |
| 642 | |
| 643 | // reset to device coordinates |
| 644 | GrDrawState* drawState = target->drawState(); |
bsalomon@google.com | 137f134 | 2013-05-29 21:27:53 +0000 | [diff] [blame] | 645 | GrDrawState::AutoViewMatrixRestore avmr; |
| 646 | if (!avmr.setIdentity(drawState)) { |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 647 | return false; |
| 648 | } |
| 649 | |
| 650 | bool isStroked = (SkStrokeRec::kStroke_Style == style || SkStrokeRec::kHairline_Style == style); |
| 651 | |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 652 | GrIndexBuffer* indexBuffer = this->rRectIndexBuffer(context->getGpu()); |
| 653 | if (NULL == indexBuffer) { |
| 654 | GrPrintf("Failed to create index buffer!\n"); |
| 655 | return false; |
skia.committer@gmail.com | 2cf444f | 2013-04-26 07:00:58 +0000 | [diff] [blame] | 656 | } |
| 657 | |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 658 | // if the corners are circles, use the circle renderer |
| 659 | if ((!isStroked || scaledStroke.fX == scaledStroke.fY) && xRadius == yRadius) { |
| 660 | drawState->setVertexAttribs<gCircleVertexAttribs>(SK_ARRAY_COUNT(gCircleVertexAttribs)); |
| 661 | GrAssert(sizeof(CircleVertex) == drawState->getVertexSize()); |
skia.committer@gmail.com | 2cf444f | 2013-04-26 07:00:58 +0000 | [diff] [blame] | 662 | |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 663 | GrDrawTarget::AutoReleaseGeometry geo(target, 16, 0); |
| 664 | if (!geo.succeeded()) { |
| 665 | GrPrintf("Failed to get space for vertices!\n"); |
| 666 | return false; |
| 667 | } |
| 668 | CircleVertex* verts = reinterpret_cast<CircleVertex*>(geo.vertices()); |
skia.committer@gmail.com | 2cf444f | 2013-04-26 07:00:58 +0000 | [diff] [blame] | 669 | |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 670 | SkScalar innerRadius = 0.0f; |
| 671 | SkScalar outerRadius = xRadius; |
| 672 | SkScalar halfWidth = 0; |
| 673 | if (style != SkStrokeRec::kFill_Style) { |
| 674 | if (SkScalarNearlyZero(scaledStroke.fX)) { |
| 675 | halfWidth = SK_ScalarHalf; |
| 676 | } else { |
| 677 | halfWidth = SkScalarHalf(scaledStroke.fX); |
| 678 | } |
skia.committer@gmail.com | 2cf444f | 2013-04-26 07:00:58 +0000 | [diff] [blame] | 679 | |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 680 | if (isStroked) { |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 681 | innerRadius = xRadius - halfWidth; |
| 682 | isStroked = (innerRadius > 0); |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 683 | } |
| 684 | outerRadius += halfWidth; |
| 685 | bounds.outset(halfWidth, halfWidth); |
| 686 | } |
skia.committer@gmail.com | 2cf444f | 2013-04-26 07:00:58 +0000 | [diff] [blame] | 687 | |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 688 | GrEffectRef* effect = CircleEdgeEffect::Create(isStroked); |
| 689 | static const int kCircleEdgeAttrIndex = 1; |
bsalomon@google.com | eb6879f | 2013-06-13 19:34:18 +0000 | [diff] [blame] | 690 | drawState->addCoverageEffect(effect, kCircleEdgeAttrIndex)->unref(); |
skia.committer@gmail.com | 8be02fc | 2013-05-17 07:01:11 +0000 | [diff] [blame] | 691 | |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 692 | // The radii are outset for two reasons. First, it allows the shader to simply perform |
| 693 | // clamp(distance-to-center - radius, 0, 1). Second, the outer radius is used to compute the |
| 694 | // verts of the bounding box that is rendered and the outset ensures the box will cover all |
| 695 | // pixels partially covered by the circle. |
| 696 | outerRadius += SK_ScalarHalf; |
| 697 | innerRadius -= SK_ScalarHalf; |
skia.committer@gmail.com | 2cf444f | 2013-04-26 07:00:58 +0000 | [diff] [blame] | 698 | |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 699 | // Expand the rect so all the pixels will be captured. |
| 700 | bounds.outset(SK_ScalarHalf, SK_ScalarHalf); |
skia.committer@gmail.com | 2cf444f | 2013-04-26 07:00:58 +0000 | [diff] [blame] | 701 | |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 702 | SkScalar yCoords[4] = { |
| 703 | bounds.fTop, |
| 704 | bounds.fTop + outerRadius, |
| 705 | bounds.fBottom - outerRadius, |
| 706 | bounds.fBottom |
| 707 | }; |
| 708 | SkScalar yOuterRadii[4] = { |
| 709 | -outerRadius, |
| 710 | 0, |
| 711 | 0, |
| 712 | outerRadius |
| 713 | }; |
| 714 | for (int i = 0; i < 4; ++i) { |
| 715 | verts->fPos = SkPoint::Make(bounds.fLeft, yCoords[i]); |
| 716 | verts->fOffset = SkPoint::Make(-outerRadius, yOuterRadii[i]); |
| 717 | verts->fOuterRadius = outerRadius; |
| 718 | verts->fInnerRadius = innerRadius; |
| 719 | verts++; |
skia.committer@gmail.com | 2cf444f | 2013-04-26 07:00:58 +0000 | [diff] [blame] | 720 | |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 721 | verts->fPos = SkPoint::Make(bounds.fLeft + outerRadius, yCoords[i]); |
| 722 | verts->fOffset = SkPoint::Make(0, yOuterRadii[i]); |
| 723 | verts->fOuterRadius = outerRadius; |
| 724 | verts->fInnerRadius = innerRadius; |
| 725 | verts++; |
skia.committer@gmail.com | 2cf444f | 2013-04-26 07:00:58 +0000 | [diff] [blame] | 726 | |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 727 | verts->fPos = SkPoint::Make(bounds.fRight - outerRadius, yCoords[i]); |
| 728 | verts->fOffset = SkPoint::Make(0, yOuterRadii[i]); |
| 729 | verts->fOuterRadius = outerRadius; |
| 730 | verts->fInnerRadius = innerRadius; |
| 731 | verts++; |
skia.committer@gmail.com | 2cf444f | 2013-04-26 07:00:58 +0000 | [diff] [blame] | 732 | |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 733 | verts->fPos = SkPoint::Make(bounds.fRight, yCoords[i]); |
| 734 | verts->fOffset = SkPoint::Make(outerRadius, yOuterRadii[i]); |
| 735 | verts->fOuterRadius = outerRadius; |
| 736 | verts->fInnerRadius = innerRadius; |
| 737 | verts++; |
| 738 | } |
skia.committer@gmail.com | 2cf444f | 2013-04-26 07:00:58 +0000 | [diff] [blame] | 739 | |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 740 | // drop out the middle quad if we're stroked |
| 741 | int indexCnt = isStroked ? GR_ARRAY_COUNT(gRRectIndices)-6 : GR_ARRAY_COUNT(gRRectIndices); |
| 742 | target->setIndexSourceToBuffer(indexBuffer); |
| 743 | target->drawIndexed(kTriangles_GrPrimitiveType, 0, 0, 16, indexCnt, &bounds); |
skia.committer@gmail.com | 2cf444f | 2013-04-26 07:00:58 +0000 | [diff] [blame] | 744 | |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 745 | // otherwise we use the ellipse renderer |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 746 | } else { |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 747 | drawState->setVertexAttribs<gEllipseVertexAttribs>(SK_ARRAY_COUNT(gEllipseVertexAttribs)); |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 748 | GrAssert(sizeof(EllipseVertex) == drawState->getVertexSize()); |
| 749 | |
| 750 | SkScalar innerXRadius = 0.0f; |
| 751 | SkScalar innerYRadius = 0.0f; |
| 752 | if (SkStrokeRec::kFill_Style != style) { |
| 753 | if (SkScalarNearlyZero(scaledStroke.length())) { |
| 754 | scaledStroke.set(SK_ScalarHalf, SK_ScalarHalf); |
| 755 | } else { |
| 756 | scaledStroke.scale(SK_ScalarHalf); |
| 757 | } |
| 758 | |
| 759 | // we only handle thick strokes for near-circular ellipses |
skia.committer@gmail.com | 8be02fc | 2013-05-17 07:01:11 +0000 | [diff] [blame] | 760 | if (scaledStroke.length() > SK_ScalarHalf && |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 761 | (SK_ScalarHalf*xRadius > yRadius || SK_ScalarHalf*yRadius > xRadius)) { |
| 762 | return false; |
| 763 | } |
| 764 | |
| 765 | // we don't handle it if curvature of the stroke is less than curvature of the ellipse |
| 766 | if (scaledStroke.fX*(yRadius*yRadius) < (scaledStroke.fY*scaledStroke.fY)*xRadius || |
| 767 | scaledStroke.fY*(xRadius*xRadius) < (scaledStroke.fX*scaledStroke.fX)*yRadius) { |
| 768 | return false; |
| 769 | } |
| 770 | |
| 771 | // this is legit only if scale & translation (which should be the case at the moment) |
| 772 | if (isStroked) { |
| 773 | innerXRadius = xRadius - scaledStroke.fX; |
| 774 | innerYRadius = yRadius - scaledStroke.fY; |
| 775 | isStroked = (innerXRadius > 0 && innerYRadius > 0); |
| 776 | } |
| 777 | |
| 778 | xRadius += scaledStroke.fX; |
| 779 | yRadius += scaledStroke.fY; |
| 780 | bounds.outset(scaledStroke.fX, scaledStroke.fY); |
| 781 | } |
jvanverth@google.com | e364741 | 2013-05-08 15:31:43 +0000 | [diff] [blame] | 782 | |
| 783 | GrDrawTarget::AutoReleaseGeometry geo(target, 16, 0); |
| 784 | if (!geo.succeeded()) { |
| 785 | GrPrintf("Failed to get space for vertices!\n"); |
| 786 | return false; |
| 787 | } |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 788 | EllipseVertex* verts = reinterpret_cast<EllipseVertex*>(geo.vertices()); |
jvanverth@google.com | e364741 | 2013-05-08 15:31:43 +0000 | [diff] [blame] | 789 | |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 790 | GrEffectRef* effect = EllipseEdgeEffect::Create(isStroked); |
jvanverth@google.com | e364741 | 2013-05-08 15:31:43 +0000 | [diff] [blame] | 791 | static const int kEllipseOffsetAttrIndex = 1; |
| 792 | static const int kEllipseRadiiAttrIndex = 2; |
bsalomon@google.com | eb6879f | 2013-06-13 19:34:18 +0000 | [diff] [blame] | 793 | drawState->addCoverageEffect(effect, |
| 794 | kEllipseOffsetAttrIndex, kEllipseRadiiAttrIndex)->unref(); |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 795 | |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 796 | // Compute the reciprocals of the radii here to save time in the shader |
| 797 | SkScalar xRadRecip = SkScalarInvert(xRadius); |
| 798 | SkScalar yRadRecip = SkScalarInvert(yRadius); |
| 799 | SkScalar xInnerRadRecip = SkScalarInvert(innerXRadius); |
| 800 | SkScalar yInnerRadRecip = SkScalarInvert(innerYRadius); |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 801 | |
| 802 | // Extend the radii out half a pixel to antialias. |
| 803 | SkScalar xOuterRadius = xRadius + SK_ScalarHalf; |
| 804 | SkScalar yOuterRadius = yRadius + SK_ScalarHalf; |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 805 | |
| 806 | // Expand the rect so all the pixels will be captured. |
| 807 | bounds.outset(SK_ScalarHalf, SK_ScalarHalf); |
| 808 | |
| 809 | SkScalar yCoords[4] = { |
| 810 | bounds.fTop, |
| 811 | bounds.fTop + yOuterRadius, |
| 812 | bounds.fBottom - yOuterRadius, |
| 813 | bounds.fBottom |
| 814 | }; |
| 815 | SkScalar yOuterOffsets[4] = { |
jvanverth@google.com | d1b5b14 | 2013-07-02 14:46:03 +0000 | [diff] [blame^] | 816 | yOuterRadius, |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 817 | SK_ScalarNearlyZero, // we're using inversesqrt() in the shader, so can't be exactly 0 |
| 818 | SK_ScalarNearlyZero, |
| 819 | yOuterRadius |
| 820 | }; |
| 821 | |
| 822 | for (int i = 0; i < 4; ++i) { |
| 823 | verts->fPos = SkPoint::Make(bounds.fLeft, yCoords[i]); |
jvanverth@google.com | d1b5b14 | 2013-07-02 14:46:03 +0000 | [diff] [blame^] | 824 | verts->fOffset = SkPoint::Make(xOuterRadius, yOuterOffsets[i]); |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 825 | verts->fOuterRadii = SkPoint::Make(xRadRecip, yRadRecip); |
| 826 | verts->fInnerRadii = SkPoint::Make(xInnerRadRecip, yInnerRadRecip); |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 827 | verts++; |
| 828 | |
| 829 | verts->fPos = SkPoint::Make(bounds.fLeft + xOuterRadius, yCoords[i]); |
| 830 | verts->fOffset = SkPoint::Make(SK_ScalarNearlyZero, yOuterOffsets[i]); |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 831 | verts->fOuterRadii = SkPoint::Make(xRadRecip, yRadRecip); |
| 832 | verts->fInnerRadii = SkPoint::Make(xInnerRadRecip, yInnerRadRecip); |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 833 | verts++; |
| 834 | |
| 835 | verts->fPos = SkPoint::Make(bounds.fRight - xOuterRadius, yCoords[i]); |
| 836 | verts->fOffset = SkPoint::Make(SK_ScalarNearlyZero, yOuterOffsets[i]); |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 837 | verts->fOuterRadii = SkPoint::Make(xRadRecip, yRadRecip); |
| 838 | verts->fInnerRadii = SkPoint::Make(xInnerRadRecip, yInnerRadRecip); |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 839 | verts++; |
| 840 | |
| 841 | verts->fPos = SkPoint::Make(bounds.fRight, yCoords[i]); |
| 842 | verts->fOffset = SkPoint::Make(xOuterRadius, yOuterOffsets[i]); |
commit-bot@chromium.org | 6bb3efc | 2013-05-16 13:14:46 +0000 | [diff] [blame] | 843 | verts->fOuterRadii = SkPoint::Make(xRadRecip, yRadRecip); |
| 844 | verts->fInnerRadii = SkPoint::Make(xInnerRadRecip, yInnerRadRecip); |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 845 | verts++; |
| 846 | } |
skia.committer@gmail.com | 2cf444f | 2013-04-26 07:00:58 +0000 | [diff] [blame] | 847 | |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 848 | // drop out the middle quad if we're stroked |
| 849 | int indexCnt = isStroked ? GR_ARRAY_COUNT(gRRectIndices)-6 : GR_ARRAY_COUNT(gRRectIndices); |
| 850 | target->setIndexSourceToBuffer(indexBuffer); |
| 851 | target->drawIndexed(kTriangles_GrPrimitiveType, 0, 0, 16, indexCnt, &bounds); |
| 852 | } |
skia.committer@gmail.com | 2cf444f | 2013-04-26 07:00:58 +0000 | [diff] [blame] | 853 | |
commit-bot@chromium.org | f2bfd54 | 2013-04-25 15:27:00 +0000 | [diff] [blame] | 854 | return true; |
| 855 | } |