senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2012 The Android Open Source Project |
| 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 "SkLightingImageFilter.h" |
| 9 | #include "SkBitmap.h" |
| 10 | #include "SkColorPriv.h" |
senorblanco@chromium.org | 894790d | 2012-07-11 16:01:22 +0000 | [diff] [blame] | 11 | #include "GrProgramStageFactory.h" |
| 12 | #include "gl/GrGLProgramStage.h" |
| 13 | #include "gl/GrGLSL.h" |
| 14 | #include "gl/GrGLTexture.h" |
| 15 | #include "GrCustomStage.h" |
| 16 | |
| 17 | class GrGLDiffuseLightingEffect; |
| 18 | class GrGLSpecularLightingEffect; |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 19 | |
| 20 | // FIXME: Eventually, this should be implemented properly, and put in |
| 21 | // SkScalar.h. |
| 22 | #define SkScalarPow(x, y) SkFloatToScalar(powf(SkScalarToFloat(x), SkScalarToFloat(y))) |
| 23 | namespace { |
| 24 | |
| 25 | const SkScalar gOneThird = SkScalarInvert(SkIntToScalar(3)); |
| 26 | const SkScalar gTwoThirds = SkScalarDiv(SkIntToScalar(2), SkIntToScalar(3)); |
| 27 | const SkScalar gOneHalf = SkFloatToScalar(0.5f); |
| 28 | const SkScalar gOneQuarter = SkFloatToScalar(0.25f); |
| 29 | |
senorblanco@chromium.org | 894790d | 2012-07-11 16:01:22 +0000 | [diff] [blame] | 30 | void setUniformPoint3(const GrGLInterface* gl, GrGLint location, const SkPoint3& point) { |
| 31 | float x = SkScalarToFloat(point.fX); |
| 32 | float y = SkScalarToFloat(point.fY); |
| 33 | float z = SkScalarToFloat(point.fZ); |
| 34 | GR_GL_CALL(gl, Uniform3f(location, x, y, z)); |
| 35 | } |
| 36 | |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 37 | // Shift matrix components to the left, as we advance pixels to the right. |
| 38 | inline void shiftMatrixLeft(int m[9]) { |
| 39 | m[0] = m[1]; |
| 40 | m[3] = m[4]; |
| 41 | m[6] = m[7]; |
| 42 | m[1] = m[2]; |
| 43 | m[4] = m[5]; |
| 44 | m[7] = m[8]; |
| 45 | } |
| 46 | |
| 47 | class DiffuseLightingType { |
| 48 | public: |
| 49 | DiffuseLightingType(SkScalar kd) |
| 50 | : fKD(kd) {} |
| 51 | SkPMColor light(const SkPoint3& normal, const SkPoint3& surfaceTolight, const SkPoint3& lightColor) const { |
| 52 | SkScalar colorScale = SkScalarMul(fKD, normal.dot(surfaceTolight)); |
| 53 | colorScale = SkScalarClampMax(colorScale, SK_Scalar1); |
| 54 | SkPoint3 color(lightColor * colorScale); |
| 55 | return SkPackARGB32(255, |
| 56 | SkScalarFloorToInt(color.fX), |
| 57 | SkScalarFloorToInt(color.fY), |
| 58 | SkScalarFloorToInt(color.fZ)); |
| 59 | } |
| 60 | private: |
| 61 | SkScalar fKD; |
| 62 | }; |
| 63 | |
| 64 | class SpecularLightingType { |
| 65 | public: |
| 66 | SpecularLightingType(SkScalar ks, SkScalar shininess) |
| 67 | : fKS(ks), fShininess(shininess) {} |
| 68 | SkPMColor light(const SkPoint3& normal, const SkPoint3& surfaceTolight, const SkPoint3& lightColor) const { |
| 69 | SkPoint3 halfDir(surfaceTolight); |
| 70 | halfDir.fZ += SK_Scalar1; // eye position is always (0, 0, 1) |
| 71 | halfDir.normalize(); |
| 72 | SkScalar colorScale = SkScalarMul(fKS, |
| 73 | SkScalarPow(normal.dot(halfDir), fShininess)); |
| 74 | colorScale = SkScalarClampMax(colorScale, SK_Scalar1); |
| 75 | SkPoint3 color(lightColor * colorScale); |
| 76 | return SkPackARGB32(SkScalarFloorToInt(color.maxComponent()), |
| 77 | SkScalarFloorToInt(color.fX), |
| 78 | SkScalarFloorToInt(color.fY), |
| 79 | SkScalarFloorToInt(color.fZ)); |
| 80 | } |
| 81 | private: |
| 82 | SkScalar fKS; |
| 83 | SkScalar fShininess; |
| 84 | }; |
| 85 | |
| 86 | inline SkScalar sobel(int a, int b, int c, int d, int e, int f, SkScalar scale) { |
| 87 | return SkScalarMul(SkIntToScalar(-a + b - 2 * c + 2 * d -e + f), scale); |
| 88 | } |
| 89 | |
| 90 | inline SkPoint3 pointToNormal(SkScalar x, SkScalar y, SkScalar surfaceScale) { |
| 91 | SkPoint3 vector(SkScalarMul(-x, surfaceScale), |
| 92 | SkScalarMul(-y, surfaceScale), |
| 93 | SK_Scalar1); |
| 94 | vector.normalize(); |
| 95 | return vector; |
| 96 | } |
| 97 | |
| 98 | inline SkPoint3 topLeftNormal(int m[9], SkScalar surfaceScale) { |
| 99 | return pointToNormal(sobel(0, 0, m[4], m[5], m[7], m[8], gTwoThirds), |
| 100 | sobel(0, 0, m[4], m[7], m[5], m[8], gTwoThirds), |
| 101 | surfaceScale); |
| 102 | } |
| 103 | |
| 104 | inline SkPoint3 topNormal(int m[9], SkScalar surfaceScale) { |
| 105 | return pointToNormal(sobel( 0, 0, m[3], m[5], m[6], m[8], gOneThird), |
| 106 | sobel(m[3], m[6], m[4], m[7], m[5], m[8], gOneHalf), |
| 107 | surfaceScale); |
| 108 | } |
| 109 | |
| 110 | inline SkPoint3 topRightNormal(int m[9], SkScalar surfaceScale) { |
| 111 | return pointToNormal(sobel( 0, 0, m[3], m[4], m[6], m[7], gTwoThirds), |
| 112 | sobel(m[3], m[6], m[4], m[7], 0, 0, gTwoThirds), |
| 113 | surfaceScale); |
| 114 | } |
| 115 | |
| 116 | inline SkPoint3 leftNormal(int m[9], SkScalar surfaceScale) { |
| 117 | return pointToNormal(sobel(m[1], m[2], m[4], m[5], m[7], m[8], gOneHalf), |
| 118 | sobel( 0, 0, m[1], m[7], m[2], m[8], gOneThird), |
| 119 | surfaceScale); |
| 120 | } |
| 121 | |
| 122 | |
| 123 | inline SkPoint3 interiorNormal(int m[9], SkScalar surfaceScale) { |
| 124 | return pointToNormal(sobel(m[0], m[2], m[3], m[5], m[6], m[8], gOneQuarter), |
| 125 | sobel(m[0], m[6], m[1], m[7], m[2], m[8], gOneQuarter), |
| 126 | surfaceScale); |
| 127 | } |
| 128 | |
| 129 | inline SkPoint3 rightNormal(int m[9], SkScalar surfaceScale) { |
| 130 | return pointToNormal(sobel(m[0], m[1], m[3], m[4], m[6], m[7], gOneHalf), |
| 131 | sobel(m[0], m[6], m[1], m[7], 0, 0, gOneThird), |
| 132 | surfaceScale); |
| 133 | } |
| 134 | |
| 135 | inline SkPoint3 bottomLeftNormal(int m[9], SkScalar surfaceScale) { |
| 136 | return pointToNormal(sobel(m[1], m[2], m[4], m[5], 0, 0, gTwoThirds), |
| 137 | sobel( 0, 0, m[1], m[4], m[2], m[5], gTwoThirds), |
| 138 | surfaceScale); |
| 139 | } |
| 140 | |
| 141 | inline SkPoint3 bottomNormal(int m[9], SkScalar surfaceScale) { |
| 142 | return pointToNormal(sobel(m[0], m[2], m[3], m[5], 0, 0, gOneThird), |
| 143 | sobel(m[0], m[3], m[1], m[4], m[2], m[5], gOneHalf), |
| 144 | surfaceScale); |
| 145 | } |
| 146 | |
| 147 | inline SkPoint3 bottomRightNormal(int m[9], SkScalar surfaceScale) { |
| 148 | return pointToNormal(sobel(m[0], m[1], m[3], m[4], 0, 0, gTwoThirds), |
| 149 | sobel(m[0], m[3], m[1], m[4], 0, 0, gTwoThirds), |
| 150 | surfaceScale); |
| 151 | } |
| 152 | |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 153 | template <class LightingType, class LightType> void lightBitmap(const LightingType& lightingType, const SkLight* light, const SkBitmap& src, SkBitmap* dst, SkScalar surfaceScale) { |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 154 | const LightType* l = static_cast<const LightType*>(light); |
| 155 | int y = 0; |
| 156 | { |
| 157 | const SkPMColor* row1 = src.getAddr32(0, 0); |
| 158 | const SkPMColor* row2 = src.getAddr32(0, 1); |
| 159 | SkPMColor* dptr = dst->getAddr32(0, 0); |
| 160 | int m[9]; |
| 161 | int x = 0; |
| 162 | m[4] = SkGetPackedA32(*row1++); |
| 163 | m[5] = SkGetPackedA32(*row1++); |
| 164 | m[7] = SkGetPackedA32(*row2++); |
| 165 | m[8] = SkGetPackedA32(*row2++); |
| 166 | SkPoint3 surfaceToLight = l->surfaceToLight(x, y, m[4], surfaceScale); |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 167 | *dptr++ = lightingType.light(topLeftNormal(m, surfaceScale), surfaceToLight, l->lightColor(surfaceToLight)); |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 168 | for (x = 1; x < src.width() - 1; ++x) |
| 169 | { |
| 170 | shiftMatrixLeft(m); |
| 171 | m[5] = SkGetPackedA32(*row1++); |
| 172 | m[8] = SkGetPackedA32(*row2++); |
| 173 | surfaceToLight = l->surfaceToLight(x, 0, m[4], surfaceScale); |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 174 | *dptr++ = lightingType.light(topNormal(m, surfaceScale), surfaceToLight, l->lightColor(surfaceToLight)); |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 175 | } |
| 176 | shiftMatrixLeft(m); |
| 177 | surfaceToLight = l->surfaceToLight(x, y, m[4], surfaceScale); |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 178 | *dptr++ = lightingType.light(topRightNormal(m, surfaceScale), surfaceToLight, l->lightColor(surfaceToLight)); |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 179 | } |
| 180 | |
| 181 | for (++y; y < src.height() - 1; ++y) { |
| 182 | const SkPMColor* row0 = src.getAddr32(0, y - 1); |
| 183 | const SkPMColor* row1 = src.getAddr32(0, y); |
| 184 | const SkPMColor* row2 = src.getAddr32(0, y + 1); |
| 185 | SkPMColor* dptr = dst->getAddr32(0, y); |
| 186 | int m[9]; |
| 187 | int x = 0; |
| 188 | m[1] = SkGetPackedA32(*row0++); |
| 189 | m[2] = SkGetPackedA32(*row0++); |
| 190 | m[4] = SkGetPackedA32(*row1++); |
| 191 | m[5] = SkGetPackedA32(*row1++); |
| 192 | m[7] = SkGetPackedA32(*row2++); |
| 193 | m[8] = SkGetPackedA32(*row2++); |
| 194 | SkPoint3 surfaceToLight = l->surfaceToLight(x, y, m[4], surfaceScale); |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 195 | *dptr++ = lightingType.light(leftNormal(m, surfaceScale), surfaceToLight, l->lightColor(surfaceToLight)); |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 196 | for (x = 1; x < src.width() - 1; ++x) { |
| 197 | shiftMatrixLeft(m); |
| 198 | m[2] = SkGetPackedA32(*row0++); |
| 199 | m[5] = SkGetPackedA32(*row1++); |
| 200 | m[8] = SkGetPackedA32(*row2++); |
| 201 | surfaceToLight = l->surfaceToLight(x, y, m[4], surfaceScale); |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 202 | *dptr++ = lightingType.light(interiorNormal(m, surfaceScale), surfaceToLight, l->lightColor(surfaceToLight)); |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 203 | } |
| 204 | shiftMatrixLeft(m); |
| 205 | surfaceToLight = l->surfaceToLight(x, y, m[4], surfaceScale); |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 206 | *dptr++ = lightingType.light(rightNormal(m, surfaceScale), surfaceToLight, l->lightColor(surfaceToLight)); |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 207 | } |
| 208 | |
| 209 | { |
| 210 | const SkPMColor* row0 = src.getAddr32(0, src.height() - 2); |
| 211 | const SkPMColor* row1 = src.getAddr32(0, src.height() - 1); |
| 212 | int x = 0; |
| 213 | SkPMColor* dptr = dst->getAddr32(0, src.height() - 1); |
| 214 | int m[9]; |
| 215 | m[1] = SkGetPackedA32(*row0++); |
| 216 | m[2] = SkGetPackedA32(*row0++); |
| 217 | m[4] = SkGetPackedA32(*row1++); |
| 218 | m[5] = SkGetPackedA32(*row1++); |
| 219 | SkPoint3 surfaceToLight = l->surfaceToLight(x, y, m[4], surfaceScale); |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 220 | *dptr++ = lightingType.light(bottomLeftNormal(m, surfaceScale), surfaceToLight, l->lightColor(surfaceToLight)); |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 221 | for (x = 1; x < src.width() - 1; ++x) |
| 222 | { |
| 223 | shiftMatrixLeft(m); |
| 224 | m[2] = SkGetPackedA32(*row0++); |
| 225 | m[5] = SkGetPackedA32(*row1++); |
| 226 | surfaceToLight = l->surfaceToLight(x, y, m[4], surfaceScale); |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 227 | *dptr++ = lightingType.light(bottomNormal(m, surfaceScale), surfaceToLight, l->lightColor(surfaceToLight)); |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 228 | } |
| 229 | shiftMatrixLeft(m); |
| 230 | surfaceToLight = l->surfaceToLight(x, y, m[4], surfaceScale); |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 231 | *dptr++ = lightingType.light(bottomRightNormal(m, surfaceScale), surfaceToLight, l->lightColor(surfaceToLight)); |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 232 | } |
| 233 | } |
| 234 | |
| 235 | SkPoint3 readPoint3(SkFlattenableReadBuffer& buffer) { |
| 236 | SkPoint3 point; |
| 237 | point.fX = buffer.readScalar(); |
| 238 | point.fY = buffer.readScalar(); |
| 239 | point.fZ = buffer.readScalar(); |
| 240 | return point; |
| 241 | }; |
| 242 | |
| 243 | void writePoint3(const SkPoint3& point, SkFlattenableWriteBuffer& buffer) { |
| 244 | buffer.writeScalar(point.fX); |
| 245 | buffer.writeScalar(point.fY); |
| 246 | buffer.writeScalar(point.fZ); |
| 247 | }; |
| 248 | |
| 249 | class SkDiffuseLightingImageFilter : public SkLightingImageFilter { |
| 250 | public: |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 251 | SkDiffuseLightingImageFilter(SkLight* light, SkScalar surfaceScale, SkScalar kd); |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 252 | SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDiffuseLightingImageFilter) |
| 253 | |
senorblanco@chromium.org | 894790d | 2012-07-11 16:01:22 +0000 | [diff] [blame] | 254 | virtual bool asNewCustomStage(GrCustomStage** stage) const SK_OVERRIDE; |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 255 | SkScalar kd() const { return fKD; } |
| 256 | |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 257 | protected: |
| 258 | explicit SkDiffuseLightingImageFilter(SkFlattenableReadBuffer& buffer); |
| 259 | virtual void flatten(SkFlattenableWriteBuffer& buffer) const SK_OVERRIDE; |
| 260 | virtual bool onFilterImage(Proxy*, const SkBitmap& src, const SkMatrix&, |
| 261 | SkBitmap* result, SkIPoint* offset) SK_OVERRIDE; |
| 262 | |
| 263 | |
| 264 | private: |
| 265 | typedef SkLightingImageFilter INHERITED; |
| 266 | SkScalar fKD; |
| 267 | }; |
| 268 | |
| 269 | class SkSpecularLightingImageFilter : public SkLightingImageFilter { |
| 270 | public: |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 271 | SkSpecularLightingImageFilter(SkLight* light, SkScalar surfaceScale, SkScalar ks, SkScalar shininess); |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 272 | SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkSpecularLightingImageFilter) |
| 273 | |
senorblanco@chromium.org | 894790d | 2012-07-11 16:01:22 +0000 | [diff] [blame] | 274 | virtual bool asNewCustomStage(GrCustomStage** stage) const SK_OVERRIDE; |
| 275 | SkScalar ks() const { return fKS; } |
| 276 | SkScalar shininess() const { return fShininess; } |
| 277 | |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 278 | protected: |
| 279 | explicit SkSpecularLightingImageFilter(SkFlattenableReadBuffer& buffer); |
| 280 | virtual void flatten(SkFlattenableWriteBuffer& buffer) const SK_OVERRIDE; |
| 281 | virtual bool onFilterImage(Proxy*, const SkBitmap& src, const SkMatrix&, |
| 282 | SkBitmap* result, SkIPoint* offset) SK_OVERRIDE; |
| 283 | |
| 284 | private: |
| 285 | typedef SkLightingImageFilter INHERITED; |
| 286 | SkScalar fKS; |
| 287 | SkScalar fShininess; |
| 288 | }; |
| 289 | |
senorblanco@chromium.org | 894790d | 2012-07-11 16:01:22 +0000 | [diff] [blame] | 290 | |
| 291 | class GrLightingEffect : public GrCustomStage { |
| 292 | public: |
| 293 | GrLightingEffect(const SkLight* light, SkScalar surfaceScale); |
| 294 | virtual ~GrLightingEffect(); |
| 295 | |
| 296 | virtual bool isEqual(const GrCustomStage&) const SK_OVERRIDE; |
| 297 | |
| 298 | const SkLight* light() const { return fLight; } |
| 299 | SkScalar surfaceScale() const { return fSurfaceScale; } |
| 300 | private: |
| 301 | typedef GrCustomStage INHERITED; |
| 302 | const SkLight* fLight; |
| 303 | SkScalar fSurfaceScale; |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 304 | }; |
| 305 | |
senorblanco@chromium.org | 894790d | 2012-07-11 16:01:22 +0000 | [diff] [blame] | 306 | class GrDiffuseLightingEffect : public GrLightingEffect { |
| 307 | public: |
| 308 | GrDiffuseLightingEffect(const SkLight* light, SkScalar surfaceScale, SkScalar kd); |
| 309 | |
| 310 | static const char* Name() { return "DiffuseLighting"; } |
| 311 | |
| 312 | typedef GrGLDiffuseLightingEffect GLProgramStage; |
| 313 | |
| 314 | virtual const GrProgramStageFactory& getFactory() const SK_OVERRIDE; |
| 315 | virtual bool isEqual(const GrCustomStage&) const SK_OVERRIDE; |
| 316 | SkScalar kd() const { return fKD; } |
| 317 | private: |
| 318 | typedef GrLightingEffect INHERITED; |
| 319 | SkScalar fKD; |
| 320 | }; |
| 321 | |
| 322 | class GrSpecularLightingEffect : public GrLightingEffect { |
| 323 | public: |
| 324 | GrSpecularLightingEffect(const SkLight* light, SkScalar surfaceScale, SkScalar ks, SkScalar shininess); |
| 325 | |
| 326 | static const char* Name() { return "SpecularLighting"; } |
| 327 | |
| 328 | typedef GrGLSpecularLightingEffect GLProgramStage; |
| 329 | |
| 330 | virtual const GrProgramStageFactory& getFactory() const SK_OVERRIDE; |
| 331 | virtual bool isEqual(const GrCustomStage&) const SK_OVERRIDE; |
| 332 | SkScalar ks() const { return fKS; } |
| 333 | SkScalar shininess() const { return fShininess; } |
| 334 | |
| 335 | private: |
| 336 | typedef GrLightingEffect INHERITED; |
| 337 | SkScalar fKS; |
| 338 | SkScalar fShininess; |
| 339 | }; |
| 340 | |
| 341 | /////////////////////////////////////////////////////////////////////////////// |
| 342 | |
| 343 | class GrGLLight { |
| 344 | public: |
senorblanco@chromium.org | 6730cbb | 2012-07-11 16:35:00 +0000 | [diff] [blame^] | 345 | virtual ~GrGLLight() {} |
senorblanco@chromium.org | 894790d | 2012-07-11 16:01:22 +0000 | [diff] [blame] | 346 | virtual void setupVariables(GrGLShaderBuilder* state, int stage); |
| 347 | virtual void emitVS(SkString* builder) const {} |
| 348 | virtual void emitFuncs(SkString* builder) const {} |
| 349 | virtual void emitSurfaceToLight(SkString* builder, const char* z) const = 0; |
| 350 | virtual void emitLightColor(SkString* builder, const char *surfaceToLight) const; |
| 351 | virtual void initUniforms(const GrGLInterface* gl, int programID); |
| 352 | virtual void setData(const GrGLInterface*, const SkLight* light) const; |
| 353 | |
| 354 | private: |
| 355 | typedef SkRefCnt INHERITED; |
| 356 | |
| 357 | protected: |
| 358 | const GrGLShaderVar* fColorVar; |
| 359 | int fColorVarLocation; |
| 360 | }; |
| 361 | |
| 362 | /////////////////////////////////////////////////////////////////////////////// |
| 363 | |
| 364 | class GrGLDistantLight : public GrGLLight { |
| 365 | public: |
senorblanco@chromium.org | 6730cbb | 2012-07-11 16:35:00 +0000 | [diff] [blame^] | 366 | virtual ~GrGLDistantLight() {} |
senorblanco@chromium.org | 894790d | 2012-07-11 16:01:22 +0000 | [diff] [blame] | 367 | virtual void setupVariables(GrGLShaderBuilder* state, int stage) SK_OVERRIDE; |
| 368 | virtual void initUniforms(const GrGLInterface* gl, int programID) SK_OVERRIDE; |
| 369 | virtual void setData(const GrGLInterface* gl, const SkLight* light) const SK_OVERRIDE; |
| 370 | virtual void emitSurfaceToLight(SkString* builder, const char* z) const SK_OVERRIDE; |
| 371 | |
| 372 | private: |
| 373 | typedef GrGLLight INHERITED; |
| 374 | const GrGLShaderVar* fDirectionVar; |
| 375 | int fDirectionLocation; |
| 376 | }; |
| 377 | |
| 378 | /////////////////////////////////////////////////////////////////////////////// |
| 379 | |
| 380 | class GrGLPointLight : public GrGLLight { |
| 381 | public: |
senorblanco@chromium.org | 6730cbb | 2012-07-11 16:35:00 +0000 | [diff] [blame^] | 382 | virtual ~GrGLPointLight() {} |
senorblanco@chromium.org | 894790d | 2012-07-11 16:01:22 +0000 | [diff] [blame] | 383 | virtual void setupVariables(GrGLShaderBuilder* state, int stage); |
| 384 | virtual void initUniforms(const GrGLInterface* gl, int programID); |
| 385 | virtual void setData(const GrGLInterface* gl, const SkLight* light) const SK_OVERRIDE; |
| 386 | virtual void emitVS(SkString* builder) const; |
| 387 | virtual void emitSurfaceToLight(SkString* builder, const char* z) const SK_OVERRIDE; |
| 388 | |
| 389 | private: |
| 390 | typedef GrGLLight INHERITED; |
| 391 | SkPoint3 fLocation; |
| 392 | const GrGLShaderVar* fLocationVar; |
| 393 | int fLocationLocation; |
| 394 | const char* fHeightVaryingName; |
| 395 | }; |
| 396 | |
| 397 | /////////////////////////////////////////////////////////////////////////////// |
| 398 | |
| 399 | class GrGLSpotLight : public GrGLLight { |
| 400 | public: |
senorblanco@chromium.org | 6730cbb | 2012-07-11 16:35:00 +0000 | [diff] [blame^] | 401 | virtual ~GrGLSpotLight() {} |
senorblanco@chromium.org | 894790d | 2012-07-11 16:01:22 +0000 | [diff] [blame] | 402 | virtual void setupVariables(GrGLShaderBuilder* state, int stage); |
| 403 | virtual void initUniforms(const GrGLInterface* gl, int programID); |
| 404 | virtual void setData(const GrGLInterface* gl, const SkLight* light) const SK_OVERRIDE; |
| 405 | virtual void emitVS(SkString* builder) const; |
| 406 | virtual void emitFuncs(SkString* builder) const; |
| 407 | virtual void emitSurfaceToLight(SkString* builder, const char* z) const SK_OVERRIDE; |
| 408 | virtual void emitLightColor(SkString* builder, const char *surfaceToLight) const; |
| 409 | |
| 410 | private: |
| 411 | typedef GrGLLight INHERITED; |
| 412 | |
| 413 | const GrGLShaderVar* fLocationVar; |
| 414 | int fLocationLocation; |
| 415 | const GrGLShaderVar* fExponentVar; |
| 416 | int fExponentLocation; |
| 417 | const GrGLShaderVar* fCosOuterConeAngleVar; |
| 418 | int fCosOuterConeAngleLocation; |
| 419 | const GrGLShaderVar* fCosInnerConeAngleVar; |
| 420 | int fCosInnerConeAngleLocation; |
| 421 | const GrGLShaderVar* fConeScaleVar; |
| 422 | int fConeScaleLocation; |
| 423 | const GrGLShaderVar* fSVar; |
| 424 | int fSLocation; |
| 425 | const char* fHeightVaryingName; |
| 426 | }; |
| 427 | |
| 428 | }; |
| 429 | |
| 430 | /////////////////////////////////////////////////////////////////////////////// |
| 431 | |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 432 | class SkLight : public SkFlattenable { |
| 433 | public: |
robertphillips@google.com | 0456e0b | 2012-06-27 14:03:26 +0000 | [diff] [blame] | 434 | SK_DECLARE_INST_COUNT(SkLight) |
| 435 | |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 436 | enum LightType { |
| 437 | kDistant_LightType, |
| 438 | kPoint_LightType, |
| 439 | kSpot_LightType, |
| 440 | }; |
| 441 | virtual LightType type() const = 0; |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 442 | const SkPoint3& color() const { return fColor; } |
senorblanco@chromium.org | 894790d | 2012-07-11 16:01:22 +0000 | [diff] [blame] | 443 | virtual GrGLLight* createGLLight() const = 0; |
| 444 | virtual bool isEqual(const SkLight& other) const { |
| 445 | return fColor == other.fColor; |
| 446 | } |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 447 | |
djsollen@google.com | 0833777 | 2012-06-26 14:33:13 +0000 | [diff] [blame] | 448 | protected: |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 449 | SkLight(SkColor color) |
| 450 | : fColor(SkIntToScalar(SkColorGetR(color)), |
| 451 | SkIntToScalar(SkColorGetG(color)), |
| 452 | SkIntToScalar(SkColorGetB(color))) {} |
| 453 | SkLight(SkFlattenableReadBuffer& buffer) |
| 454 | : INHERITED(buffer) { |
| 455 | fColor = readPoint3(buffer); |
| 456 | } |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 457 | virtual void flatten(SkFlattenableWriteBuffer& buffer) const SK_OVERRIDE { |
djsollen@google.com | 0833777 | 2012-06-26 14:33:13 +0000 | [diff] [blame] | 458 | INHERITED::flatten(buffer); |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 459 | writePoint3(fColor, buffer); |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 460 | } |
djsollen@google.com | 0833777 | 2012-06-26 14:33:13 +0000 | [diff] [blame] | 461 | |
| 462 | private: |
| 463 | typedef SkFlattenable INHERITED; |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 464 | SkPoint3 fColor; |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 465 | }; |
| 466 | |
robertphillips@google.com | 0456e0b | 2012-06-27 14:03:26 +0000 | [diff] [blame] | 467 | SK_DEFINE_INST_COUNT(SkLight) |
| 468 | |
senorblanco@chromium.org | 894790d | 2012-07-11 16:01:22 +0000 | [diff] [blame] | 469 | /////////////////////////////////////////////////////////////////////////////// |
| 470 | |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 471 | class SkDistantLight : public SkLight { |
| 472 | public: |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 473 | SkDistantLight(const SkPoint3& direction, SkColor color) |
| 474 | : INHERITED(color), fDirection(direction) { |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 475 | } |
djsollen@google.com | 0833777 | 2012-06-26 14:33:13 +0000 | [diff] [blame] | 476 | |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 477 | SkPoint3 surfaceToLight(int x, int y, int z, SkScalar surfaceScale) const { |
| 478 | return fDirection; |
| 479 | }; |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 480 | SkPoint3 lightColor(const SkPoint3&) const { return color(); } |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 481 | virtual LightType type() const { return kDistant_LightType; } |
senorblanco@chromium.org | 894790d | 2012-07-11 16:01:22 +0000 | [diff] [blame] | 482 | const SkPoint3& direction() const { return fDirection; } |
| 483 | virtual GrGLLight* createGLLight() const SK_OVERRIDE; |
senorblanco@chromium.org | 6730cbb | 2012-07-11 16:35:00 +0000 | [diff] [blame^] | 484 | virtual bool isEqual(const SkLight& other) const SK_OVERRIDE { |
| 485 | if (other.type() != kDistant_LightType) { |
| 486 | return false; |
| 487 | } |
| 488 | |
| 489 | const SkDistantLight& o = static_cast<const SkDistantLight&>(other); |
| 490 | return INHERITED::isEqual(other) && |
| 491 | fDirection == o.fDirection; |
| 492 | } |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 493 | |
| 494 | SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDistantLight) |
| 495 | |
djsollen@google.com | 0833777 | 2012-06-26 14:33:13 +0000 | [diff] [blame] | 496 | protected: |
| 497 | SkDistantLight(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) { |
| 498 | fDirection = readPoint3(buffer); |
| 499 | } |
| 500 | virtual void flatten(SkFlattenableWriteBuffer& buffer) const { |
| 501 | INHERITED::flatten(buffer); |
| 502 | writePoint3(fDirection, buffer); |
| 503 | } |
| 504 | |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 505 | private: |
djsollen@google.com | 0833777 | 2012-06-26 14:33:13 +0000 | [diff] [blame] | 506 | typedef SkLight INHERITED; |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 507 | SkPoint3 fDirection; |
| 508 | }; |
| 509 | |
senorblanco@chromium.org | 894790d | 2012-07-11 16:01:22 +0000 | [diff] [blame] | 510 | /////////////////////////////////////////////////////////////////////////////// |
| 511 | |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 512 | class SkPointLight : public SkLight { |
| 513 | public: |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 514 | SkPointLight(const SkPoint3& location, SkColor color) |
| 515 | : INHERITED(color), fLocation(location) {} |
djsollen@google.com | 0833777 | 2012-06-26 14:33:13 +0000 | [diff] [blame] | 516 | |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 517 | SkPoint3 surfaceToLight(int x, int y, int z, SkScalar surfaceScale) const { |
| 518 | SkPoint3 direction(fLocation.fX - SkIntToScalar(x), |
| 519 | fLocation.fY - SkIntToScalar(y), |
| 520 | fLocation.fZ - SkScalarMul(SkIntToScalar(z), surfaceScale)); |
| 521 | direction.normalize(); |
| 522 | return direction; |
| 523 | }; |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 524 | SkPoint3 lightColor(const SkPoint3&) const { return color(); } |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 525 | virtual LightType type() const { return kPoint_LightType; } |
senorblanco@chromium.org | 894790d | 2012-07-11 16:01:22 +0000 | [diff] [blame] | 526 | const SkPoint3& location() const { return fLocation; } |
| 527 | virtual GrGLLight* createGLLight() const SK_OVERRIDE { |
| 528 | return new GrGLPointLight(); |
| 529 | } |
senorblanco@chromium.org | 6730cbb | 2012-07-11 16:35:00 +0000 | [diff] [blame^] | 530 | virtual bool isEqual(const SkLight& other) const SK_OVERRIDE { |
senorblanco@chromium.org | 894790d | 2012-07-11 16:01:22 +0000 | [diff] [blame] | 531 | if (other.type() != kPoint_LightType) { |
| 532 | return false; |
| 533 | } |
| 534 | const SkPointLight& o = static_cast<const SkPointLight&>(other); |
| 535 | return INHERITED::isEqual(other) && |
| 536 | fLocation == o.fLocation; |
| 537 | } |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 538 | |
| 539 | SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPointLight) |
| 540 | |
djsollen@google.com | 0833777 | 2012-06-26 14:33:13 +0000 | [diff] [blame] | 541 | protected: |
| 542 | SkPointLight(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) { |
| 543 | fLocation = readPoint3(buffer); |
| 544 | } |
| 545 | virtual void flatten(SkFlattenableWriteBuffer& buffer) const { |
| 546 | INHERITED::flatten(buffer); |
| 547 | writePoint3(fLocation, buffer); |
| 548 | } |
| 549 | |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 550 | private: |
djsollen@google.com | 0833777 | 2012-06-26 14:33:13 +0000 | [diff] [blame] | 551 | typedef SkLight INHERITED; |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 552 | SkPoint3 fLocation; |
| 553 | }; |
| 554 | |
senorblanco@chromium.org | 894790d | 2012-07-11 16:01:22 +0000 | [diff] [blame] | 555 | /////////////////////////////////////////////////////////////////////////////// |
| 556 | |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 557 | class SkSpotLight : public SkLight { |
| 558 | public: |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 559 | SkSpotLight(const SkPoint3& location, const SkPoint3& target, SkScalar specularExponent, SkScalar cutoffAngle, SkColor color) |
| 560 | : INHERITED(color), |
| 561 | fLocation(location), |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 562 | fTarget(target), |
| 563 | fSpecularExponent(specularExponent) |
| 564 | { |
| 565 | fS = target - location; |
| 566 | fS.normalize(); |
| 567 | fCosOuterConeAngle = SkScalarCos(SkDegreesToRadians(cutoffAngle)); |
| 568 | const SkScalar antiAliasThreshold = SkFloatToScalar(0.016f); |
| 569 | fCosInnerConeAngle = fCosOuterConeAngle + antiAliasThreshold; |
| 570 | fConeScale = SkScalarInvert(antiAliasThreshold); |
| 571 | } |
djsollen@google.com | 0833777 | 2012-06-26 14:33:13 +0000 | [diff] [blame] | 572 | |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 573 | SkPoint3 surfaceToLight(int x, int y, int z, SkScalar surfaceScale) const { |
| 574 | SkPoint3 direction(fLocation.fX - SkIntToScalar(x), |
| 575 | fLocation.fY - SkIntToScalar(y), |
| 576 | fLocation.fZ - SkScalarMul(SkIntToScalar(z), surfaceScale)); |
| 577 | direction.normalize(); |
| 578 | return direction; |
| 579 | }; |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 580 | SkPoint3 lightColor(const SkPoint3& surfaceToLight) const { |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 581 | SkScalar cosAngle = -surfaceToLight.dot(fS); |
| 582 | if (cosAngle < fCosOuterConeAngle) { |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 583 | return SkPoint3(0, 0, 0); |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 584 | } |
| 585 | SkScalar scale = SkScalarPow(cosAngle, fSpecularExponent); |
| 586 | if (cosAngle < fCosInnerConeAngle) { |
| 587 | scale = SkScalarMul(scale, cosAngle - fCosOuterConeAngle); |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 588 | return color() * SkScalarMul(scale, fConeScale); |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 589 | } |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 590 | return color() * scale; |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 591 | } |
senorblanco@chromium.org | 894790d | 2012-07-11 16:01:22 +0000 | [diff] [blame] | 592 | virtual GrGLLight* createGLLight() const SK_OVERRIDE { |
| 593 | return new GrGLSpotLight(); |
| 594 | } |
djsollen@google.com | 0833777 | 2012-06-26 14:33:13 +0000 | [diff] [blame] | 595 | virtual LightType type() const { return kSpot_LightType; } |
senorblanco@chromium.org | 894790d | 2012-07-11 16:01:22 +0000 | [diff] [blame] | 596 | const SkPoint3& location() const { return fLocation; } |
| 597 | const SkPoint3& target() const { return fTarget; } |
| 598 | SkScalar specularExponent() const { return fSpecularExponent; } |
| 599 | SkScalar cosInnerConeAngle() const { return fCosInnerConeAngle; } |
| 600 | SkScalar cosOuterConeAngle() const { return fCosOuterConeAngle; } |
| 601 | SkScalar coneScale() const { return fConeScale; } |
| 602 | SkPoint3 s() const { return fS; } |
djsollen@google.com | 0833777 | 2012-06-26 14:33:13 +0000 | [diff] [blame] | 603 | |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 604 | SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkSpotLight) |
| 605 | |
djsollen@google.com | 0833777 | 2012-06-26 14:33:13 +0000 | [diff] [blame] | 606 | protected: |
| 607 | SkSpotLight(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) { |
| 608 | fLocation = readPoint3(buffer); |
| 609 | fTarget = readPoint3(buffer); |
| 610 | fSpecularExponent = buffer.readScalar(); |
| 611 | fCosOuterConeAngle = buffer.readScalar(); |
| 612 | fCosInnerConeAngle = buffer.readScalar(); |
| 613 | fConeScale = buffer.readScalar(); |
| 614 | fS = readPoint3(buffer); |
| 615 | } |
| 616 | virtual void flatten(SkFlattenableWriteBuffer& buffer) const { |
| 617 | INHERITED::flatten(buffer); |
| 618 | writePoint3(fLocation, buffer); |
| 619 | writePoint3(fTarget, buffer); |
| 620 | buffer.writeScalar(fSpecularExponent); |
| 621 | buffer.writeScalar(fCosOuterConeAngle); |
| 622 | buffer.writeScalar(fCosInnerConeAngle); |
| 623 | buffer.writeScalar(fConeScale); |
| 624 | writePoint3(fS, buffer); |
| 625 | } |
| 626 | |
senorblanco@chromium.org | bd9fad6 | 2012-07-11 16:25:37 +0000 | [diff] [blame] | 627 | virtual bool isEqual(const SkLight& other) const SK_OVERRIDE { |
senorblanco@chromium.org | 894790d | 2012-07-11 16:01:22 +0000 | [diff] [blame] | 628 | if (other.type() != kSpot_LightType) { |
| 629 | return false; |
| 630 | } |
| 631 | |
| 632 | const SkSpotLight& o = static_cast<const SkSpotLight&>(other); |
| 633 | return INHERITED::isEqual(other) && |
| 634 | fLocation == o.fLocation && |
| 635 | fTarget == o.fTarget && |
| 636 | fSpecularExponent == o.fSpecularExponent && |
| 637 | fCosOuterConeAngle == o.fCosOuterConeAngle; |
| 638 | } |
| 639 | |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 640 | private: |
djsollen@google.com | 0833777 | 2012-06-26 14:33:13 +0000 | [diff] [blame] | 641 | typedef SkLight INHERITED; |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 642 | SkPoint3 fLocation; |
| 643 | SkPoint3 fTarget; |
| 644 | SkScalar fSpecularExponent; |
| 645 | SkScalar fCosOuterConeAngle; |
| 646 | SkScalar fCosInnerConeAngle; |
| 647 | SkScalar fConeScale; |
| 648 | SkPoint3 fS; |
| 649 | }; |
| 650 | |
senorblanco@chromium.org | 894790d | 2012-07-11 16:01:22 +0000 | [diff] [blame] | 651 | /////////////////////////////////////////////////////////////////////////////// |
| 652 | |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 653 | SkLightingImageFilter::SkLightingImageFilter(SkLight* light, SkScalar surfaceScale) |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 654 | : fLight(light), |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 655 | fSurfaceScale(SkScalarDiv(surfaceScale, SkIntToScalar(255))) |
| 656 | { |
| 657 | SkASSERT(fLight); |
reed@google.com | 51f3866 | 2012-06-27 14:24:29 +0000 | [diff] [blame] | 658 | // our caller knows that we take ownership of the light, so we don't |
| 659 | // need to call ref() here. |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 660 | } |
| 661 | |
| 662 | SkImageFilter* SkLightingImageFilter::CreateDistantLitDiffuse( |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 663 | const SkPoint3& direction, SkColor lightColor, SkScalar surfaceScale, |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 664 | SkScalar kd) { |
| 665 | return new SkDiffuseLightingImageFilter( |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 666 | new SkDistantLight(direction, lightColor), surfaceScale, kd); |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 667 | } |
| 668 | |
| 669 | SkImageFilter* SkLightingImageFilter::CreatePointLitDiffuse( |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 670 | const SkPoint3& location, SkColor lightColor, SkScalar surfaceScale, |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 671 | SkScalar kd) { |
| 672 | return new SkDiffuseLightingImageFilter( |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 673 | new SkPointLight(location, lightColor), surfaceScale, kd); |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 674 | } |
| 675 | |
| 676 | SkImageFilter* SkLightingImageFilter::CreateSpotLitDiffuse( |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 677 | const SkPoint3& location, const SkPoint3& target, |
| 678 | SkScalar specularExponent, SkScalar cutoffAngle, |
| 679 | SkColor lightColor, SkScalar surfaceScale, SkScalar kd) { |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 680 | return new SkDiffuseLightingImageFilter( |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 681 | new SkSpotLight(location, target, specularExponent, cutoffAngle, lightColor), |
| 682 | surfaceScale, kd); |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 683 | } |
| 684 | |
| 685 | SkImageFilter* SkLightingImageFilter::CreateDistantLitSpecular( |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 686 | const SkPoint3& direction, SkColor lightColor, SkScalar surfaceScale, |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 687 | SkScalar ks, SkScalar shininess) { |
| 688 | return new SkSpecularLightingImageFilter( |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 689 | new SkDistantLight(direction, lightColor), surfaceScale, ks, shininess); |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 690 | } |
| 691 | |
| 692 | SkImageFilter* SkLightingImageFilter::CreatePointLitSpecular( |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 693 | const SkPoint3& location, SkColor lightColor, SkScalar surfaceScale, |
| 694 | SkScalar ks, SkScalar shininess) { |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 695 | return new SkSpecularLightingImageFilter( |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 696 | new SkPointLight(location, lightColor), surfaceScale, ks, shininess); |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 697 | } |
| 698 | |
| 699 | SkImageFilter* SkLightingImageFilter::CreateSpotLitSpecular( |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 700 | const SkPoint3& location, const SkPoint3& target, |
| 701 | SkScalar specularExponent, SkScalar cutoffAngle, |
| 702 | SkColor lightColor, SkScalar surfaceScale, |
| 703 | SkScalar ks, SkScalar shininess) { |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 704 | return new SkSpecularLightingImageFilter( |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 705 | new SkSpotLight(location, target, specularExponent, cutoffAngle, lightColor), |
| 706 | surfaceScale, ks, shininess); |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 707 | } |
| 708 | |
| 709 | SkLightingImageFilter::~SkLightingImageFilter() { |
| 710 | fLight->unref(); |
| 711 | } |
| 712 | |
| 713 | SkLightingImageFilter::SkLightingImageFilter(SkFlattenableReadBuffer& buffer) |
| 714 | : INHERITED(buffer) |
| 715 | { |
djsollen@google.com | 0833777 | 2012-06-26 14:33:13 +0000 | [diff] [blame] | 716 | fLight = (SkLight*)buffer.readFlattenable(); |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 717 | fSurfaceScale = buffer.readScalar(); |
| 718 | } |
| 719 | |
| 720 | void SkLightingImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const { |
| 721 | this->INHERITED::flatten(buffer); |
djsollen@google.com | 0833777 | 2012-06-26 14:33:13 +0000 | [diff] [blame] | 722 | buffer.writeFlattenable(fLight); |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 723 | buffer.writeScalar(fSurfaceScale); |
| 724 | } |
| 725 | |
senorblanco@chromium.org | 894790d | 2012-07-11 16:01:22 +0000 | [diff] [blame] | 726 | /////////////////////////////////////////////////////////////////////////////// |
| 727 | |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 728 | SkDiffuseLightingImageFilter::SkDiffuseLightingImageFilter(SkLight* light, SkScalar surfaceScale, SkScalar kd) |
| 729 | : SkLightingImageFilter(light, surfaceScale), |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 730 | fKD(kd) |
| 731 | { |
| 732 | } |
| 733 | |
| 734 | SkDiffuseLightingImageFilter::SkDiffuseLightingImageFilter(SkFlattenableReadBuffer& buffer) |
| 735 | : INHERITED(buffer) |
| 736 | { |
| 737 | fKD = buffer.readScalar(); |
| 738 | } |
| 739 | |
| 740 | void SkDiffuseLightingImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const { |
| 741 | this->INHERITED::flatten(buffer); |
| 742 | buffer.writeScalar(fKD); |
| 743 | } |
| 744 | |
| 745 | bool SkDiffuseLightingImageFilter::onFilterImage(Proxy*, |
| 746 | const SkBitmap& src, |
| 747 | const SkMatrix&, |
| 748 | SkBitmap* dst, |
| 749 | SkIPoint*) { |
| 750 | if (src.config() != SkBitmap::kARGB_8888_Config) { |
| 751 | return false; |
| 752 | } |
| 753 | SkAutoLockPixels alp(src); |
| 754 | if (!src.getPixels()) { |
| 755 | return false; |
| 756 | } |
| 757 | if (src.width() < 2 || src.height() < 2) { |
| 758 | return false; |
| 759 | } |
| 760 | dst->setConfig(src.config(), src.width(), src.height()); |
| 761 | dst->allocPixels(); |
| 762 | |
| 763 | DiffuseLightingType lightingType(fKD); |
| 764 | switch (light()->type()) { |
| 765 | case SkLight::kDistant_LightType: |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 766 | lightBitmap<DiffuseLightingType, SkDistantLight>(lightingType, light(), src, dst, surfaceScale()); |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 767 | break; |
| 768 | case SkLight::kPoint_LightType: |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 769 | lightBitmap<DiffuseLightingType, SkPointLight>(lightingType, light(), src, dst, surfaceScale()); |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 770 | break; |
| 771 | case SkLight::kSpot_LightType: |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 772 | lightBitmap<DiffuseLightingType, SkSpotLight>(lightingType, light(), src, dst, surfaceScale()); |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 773 | break; |
| 774 | } |
| 775 | return true; |
| 776 | } |
| 777 | |
senorblanco@chromium.org | 894790d | 2012-07-11 16:01:22 +0000 | [diff] [blame] | 778 | bool SkDiffuseLightingImageFilter::asNewCustomStage(GrCustomStage** stage) const { |
| 779 | if (stage) { |
| 780 | SkScalar scale = SkScalarMul(surfaceScale(), SkIntToScalar(255)); |
| 781 | *stage = new GrDiffuseLightingEffect(light(), scale, kd()); |
| 782 | } |
| 783 | return true; |
| 784 | } |
| 785 | |
| 786 | /////////////////////////////////////////////////////////////////////////////// |
| 787 | |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 788 | SkSpecularLightingImageFilter::SkSpecularLightingImageFilter(SkLight* light, SkScalar surfaceScale, SkScalar ks, SkScalar shininess) |
| 789 | : SkLightingImageFilter(light, surfaceScale), |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 790 | fKS(ks), |
| 791 | fShininess(shininess) |
| 792 | { |
| 793 | } |
| 794 | |
| 795 | SkSpecularLightingImageFilter::SkSpecularLightingImageFilter(SkFlattenableReadBuffer& buffer) |
| 796 | : INHERITED(buffer) |
| 797 | { |
| 798 | fKS = buffer.readScalar(); |
| 799 | fShininess = buffer.readScalar(); |
| 800 | } |
| 801 | |
| 802 | void SkSpecularLightingImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const { |
| 803 | this->INHERITED::flatten(buffer); |
| 804 | buffer.writeScalar(fKS); |
| 805 | buffer.writeScalar(fShininess); |
| 806 | } |
| 807 | |
| 808 | bool SkSpecularLightingImageFilter::onFilterImage(Proxy*, |
| 809 | const SkBitmap& src, |
| 810 | const SkMatrix&, |
| 811 | SkBitmap* dst, |
| 812 | SkIPoint*) { |
| 813 | if (src.config() != SkBitmap::kARGB_8888_Config) { |
| 814 | return false; |
| 815 | } |
| 816 | SkAutoLockPixels alp(src); |
| 817 | if (!src.getPixels()) { |
| 818 | return false; |
| 819 | } |
| 820 | if (src.width() < 2 || src.height() < 2) { |
| 821 | return false; |
| 822 | } |
| 823 | dst->setConfig(src.config(), src.width(), src.height()); |
| 824 | dst->allocPixels(); |
| 825 | |
| 826 | SpecularLightingType lightingType(fKS, fShininess); |
| 827 | switch (light()->type()) { |
| 828 | case SkLight::kDistant_LightType: |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 829 | lightBitmap<SpecularLightingType, SkDistantLight>(lightingType, light(), src, dst, surfaceScale()); |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 830 | break; |
| 831 | case SkLight::kPoint_LightType: |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 832 | lightBitmap<SpecularLightingType, SkPointLight>(lightingType, light(), src, dst, surfaceScale()); |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 833 | break; |
| 834 | case SkLight::kSpot_LightType: |
senorblanco@chromium.org | bdb1ec4 | 2012-07-09 14:29:51 +0000 | [diff] [blame] | 835 | lightBitmap<SpecularLightingType, SkSpotLight>(lightingType, light(), src, dst, surfaceScale()); |
senorblanco@chromium.org | f49b429 | 2012-06-22 21:01:23 +0000 | [diff] [blame] | 836 | break; |
| 837 | } |
| 838 | return true; |
| 839 | } |
| 840 | |
senorblanco@chromium.org | 894790d | 2012-07-11 16:01:22 +0000 | [diff] [blame] | 841 | bool SkSpecularLightingImageFilter::asNewCustomStage(GrCustomStage** stage) const { |
| 842 | if (stage) { |
| 843 | SkScalar scale = SkScalarMul(surfaceScale(), SkIntToScalar(255)); |
| 844 | *stage = new GrSpecularLightingEffect(light(), scale, ks(), shininess()); |
| 845 | } |
| 846 | return true; |
| 847 | } |
| 848 | |
| 849 | /////////////////////////////////////////////////////////////////////////////// |
| 850 | |
| 851 | class GrGLLightingEffect : public GrGLProgramStage { |
| 852 | public: |
| 853 | GrGLLightingEffect(const GrProgramStageFactory& factory, |
| 854 | const GrCustomStage& stage); |
| 855 | virtual ~GrGLLightingEffect(); |
| 856 | |
| 857 | virtual void setupVariables(GrGLShaderBuilder* state, |
| 858 | int stage) SK_OVERRIDE; |
| 859 | virtual void emitVS(GrGLShaderBuilder* state, |
| 860 | const char* vertexCoords) SK_OVERRIDE; |
| 861 | virtual void emitFS(GrGLShaderBuilder* state, |
| 862 | const char* outputColor, |
| 863 | const char* inputColor, |
| 864 | const char* samplerName) SK_OVERRIDE; |
| 865 | |
| 866 | virtual void emitLightFunc(SkString* funcs) = 0; |
| 867 | |
| 868 | static inline StageKey GenKey(const GrCustomStage& s); |
| 869 | |
| 870 | virtual void initUniforms(const GrGLInterface*, int programID) SK_OVERRIDE; |
| 871 | virtual void setData(const GrGLInterface*, |
| 872 | const GrGLTexture&, |
| 873 | const GrCustomStage&, |
| 874 | int stageNum) SK_OVERRIDE; |
| 875 | |
| 876 | private: |
| 877 | typedef GrGLProgramStage INHERITED; |
| 878 | |
| 879 | const GrGLShaderVar* fImageIncrementVar; |
| 880 | GrGLint fImageIncrementLocation; |
| 881 | const GrGLShaderVar* fSurfaceScaleVar; |
| 882 | GrGLint fSurfaceScaleLocation; |
| 883 | GrGLLight* fLight; |
| 884 | }; |
| 885 | |
| 886 | /////////////////////////////////////////////////////////////////////////////// |
| 887 | |
| 888 | class GrGLDiffuseLightingEffect : public GrGLLightingEffect { |
| 889 | public: |
| 890 | GrGLDiffuseLightingEffect(const GrProgramStageFactory& factory, |
| 891 | const GrCustomStage& stage); |
| 892 | virtual void setupVariables(GrGLShaderBuilder* state, |
| 893 | int stage) SK_OVERRIDE; |
| 894 | virtual void emitLightFunc(SkString* funcs) SK_OVERRIDE; |
| 895 | virtual void initUniforms(const GrGLInterface*, int programID) SK_OVERRIDE; |
| 896 | virtual void setData(const GrGLInterface*, |
| 897 | const GrGLTexture&, |
| 898 | const GrCustomStage&, |
| 899 | int stageNum) SK_OVERRIDE; |
| 900 | |
| 901 | private: |
| 902 | typedef GrGLLightingEffect INHERITED; |
| 903 | |
| 904 | const GrGLShaderVar* fKDVar; |
| 905 | GrGLint fKDLocation; |
| 906 | }; |
| 907 | |
| 908 | /////////////////////////////////////////////////////////////////////////////// |
| 909 | |
| 910 | class GrGLSpecularLightingEffect : public GrGLLightingEffect { |
| 911 | public: |
| 912 | GrGLSpecularLightingEffect(const GrProgramStageFactory& factory, |
| 913 | const GrCustomStage& stage); |
| 914 | virtual void setupVariables(GrGLShaderBuilder* state, |
| 915 | int stage) SK_OVERRIDE; |
| 916 | virtual void emitLightFunc(SkString* funcs) SK_OVERRIDE; |
| 917 | virtual void initUniforms(const GrGLInterface*, int programID) SK_OVERRIDE; |
| 918 | virtual void setData(const GrGLInterface*, |
| 919 | const GrGLTexture&, |
| 920 | const GrCustomStage&, |
| 921 | int stageNum) SK_OVERRIDE; |
| 922 | |
| 923 | private: |
| 924 | typedef GrGLLightingEffect INHERITED; |
| 925 | |
| 926 | const GrGLShaderVar* fKSVar; |
| 927 | GrGLint fKSLocation; |
| 928 | const GrGLShaderVar* fShininessVar; |
| 929 | GrGLint fShininessLocation; |
| 930 | }; |
| 931 | |
| 932 | /////////////////////////////////////////////////////////////////////////////// |
| 933 | |
| 934 | GrLightingEffect::GrLightingEffect(const SkLight* light, SkScalar surfaceScale) |
| 935 | : fLight(light) |
| 936 | , fSurfaceScale(surfaceScale) { |
| 937 | fLight->ref(); |
| 938 | } |
| 939 | |
| 940 | GrLightingEffect::~GrLightingEffect() { |
| 941 | fLight->unref(); |
| 942 | } |
| 943 | |
| 944 | bool GrLightingEffect::isEqual(const GrCustomStage& sBase) const { |
| 945 | const GrLightingEffect& s = |
| 946 | static_cast<const GrLightingEffect&>(sBase); |
| 947 | return fLight->isEqual(*s.fLight) && |
| 948 | fSurfaceScale == s.fSurfaceScale; |
| 949 | } |
| 950 | |
| 951 | /////////////////////////////////////////////////////////////////////////////// |
| 952 | |
| 953 | GrDiffuseLightingEffect::GrDiffuseLightingEffect(const SkLight* light, SkScalar surfaceScale, SkScalar kd) |
| 954 | : INHERITED(light, surfaceScale), fKD(kd) { |
| 955 | } |
| 956 | |
| 957 | const GrProgramStageFactory& GrDiffuseLightingEffect::getFactory() const { |
| 958 | return GrTProgramStageFactory<GrDiffuseLightingEffect>::getInstance(); |
| 959 | } |
| 960 | |
| 961 | bool GrDiffuseLightingEffect::isEqual(const GrCustomStage& sBase) const { |
| 962 | const GrDiffuseLightingEffect& s = |
| 963 | static_cast<const GrDiffuseLightingEffect&>(sBase); |
| 964 | return INHERITED::isEqual(sBase) && |
| 965 | this->kd() == s.kd(); |
| 966 | } |
| 967 | |
| 968 | /////////////////////////////////////////////////////////////////////////////// |
| 969 | |
| 970 | GrGLLightingEffect::GrGLLightingEffect(const GrProgramStageFactory& factory, |
| 971 | const GrCustomStage& stage) |
| 972 | : GrGLProgramStage(factory) |
| 973 | , fImageIncrementVar(NULL) |
| 974 | , fImageIncrementLocation(0) |
| 975 | , fSurfaceScaleVar(NULL) |
| 976 | , fSurfaceScaleLocation(0) { |
| 977 | const GrLightingEffect& m = static_cast<const GrLightingEffect&>(stage); |
| 978 | fLight = m.light()->createGLLight(); |
| 979 | } |
| 980 | |
| 981 | GrGLLightingEffect::~GrGLLightingEffect() { |
| 982 | delete fLight; |
| 983 | } |
| 984 | |
| 985 | void GrGLLightingEffect::setupVariables(GrGLShaderBuilder* state, int stage) { |
| 986 | fImageIncrementVar = &state->addUniform( |
| 987 | GrGLShaderBuilder::kFragment_ShaderType, |
| 988 | kVec2f_GrSLType, "uImageIncrement", stage); |
| 989 | fSurfaceScaleVar = &state->addUniform( |
| 990 | GrGLShaderBuilder::kFragment_ShaderType, |
| 991 | kFloat_GrSLType, "uSurfaceScale", stage); |
| 992 | fLight->setupVariables(state, stage); |
| 993 | } |
| 994 | |
| 995 | void GrGLLightingEffect::emitVS(GrGLShaderBuilder* state, |
| 996 | const char* vertexCoords) { |
| 997 | fLight->emitVS(&state->fVSCode); |
| 998 | } |
| 999 | |
| 1000 | void GrGLLightingEffect::initUniforms(const GrGLInterface* gl, |
| 1001 | int programID) { |
| 1002 | GR_GL_CALL_RET(gl, fSurfaceScaleLocation, |
| 1003 | GetUniformLocation(programID, |
| 1004 | fSurfaceScaleVar->getName().c_str())); |
| 1005 | GR_GL_CALL_RET(gl, fImageIncrementLocation, |
| 1006 | GetUniformLocation(programID, |
| 1007 | fImageIncrementVar->getName().c_str())); |
| 1008 | fLight->initUniforms(gl, programID); |
| 1009 | } |
| 1010 | |
| 1011 | void GrGLLightingEffect::emitFS(GrGLShaderBuilder* state, |
| 1012 | const char* outputColor, |
| 1013 | const char* inputColor, |
| 1014 | const char* samplerName) { |
| 1015 | SkString* code = &state->fFSCode; |
| 1016 | SkString* funcs = &state->fFSFunctions; |
| 1017 | fLight->emitFuncs(funcs); |
| 1018 | emitLightFunc(funcs); |
| 1019 | funcs->appendf("float sobel(float a, float b, float c, float d, float e, float f, float scale) {\n"); |
| 1020 | funcs->appendf("\treturn (-a + b - 2 * c + 2 * d -e + f) * scale;\n"); |
| 1021 | funcs->appendf("}\n"); |
| 1022 | funcs->appendf("vec3 pointToNormal(float x, float y, float scale) {\n"); |
| 1023 | funcs->appendf("\treturn normalize(vec3(-x * scale, -y * scale, 1));\n"); |
| 1024 | funcs->appendf("}\n"); |
| 1025 | funcs->append("\n\ |
| 1026 | vec3 interiorNormal(float m[9], float surfaceScale) {\n\ |
| 1027 | return pointToNormal(sobel(m[0], m[2], m[3], m[5], m[6], m[8], 0.25),\n\ |
| 1028 | sobel(m[0], m[6], m[1], m[7], m[2], m[8], 0.25),\n\ |
| 1029 | surfaceScale);\n}\n"); |
| 1030 | |
| 1031 | code->appendf("\t\tvec2 coord = %s;\n", state->fSampleCoords.c_str()); |
| 1032 | code->appendf("\t\tfloat m[9];\n"); |
| 1033 | int index = 0; |
| 1034 | for (int dy = -1; dy <= 1; dy++) { |
| 1035 | for (int dx = -1; dx <= 1; dx++) { |
| 1036 | SkString texCoords; |
| 1037 | texCoords.appendf("coord + vec2(%d, %d) * %s", dx, dy, fImageIncrementVar->getName().c_str()); |
| 1038 | code->appendf("\t\tm[%d] = ", index++); |
| 1039 | state->emitTextureLookup(samplerName, texCoords.c_str()); |
| 1040 | code->appendf(".a;\n"); |
| 1041 | } |
| 1042 | } |
| 1043 | code->appendf("\t\tvec3 surfaceToLight = "); |
| 1044 | SkString arg; |
| 1045 | arg.appendf("%s * m[4]", fSurfaceScaleVar->getName().c_str()); |
| 1046 | fLight->emitSurfaceToLight(code, arg.c_str()); |
| 1047 | code->appendf(";\n"); |
| 1048 | code->appendf("\t\t%s = light(interiorNormal(m, %s), surfaceToLight, ", outputColor, fSurfaceScaleVar->getName().c_str()); |
| 1049 | fLight->emitLightColor(code, "surfaceToLight"); |
| 1050 | code->appendf(")%s;\n", state->fModulate.c_str()); |
| 1051 | } |
| 1052 | |
| 1053 | GrGLProgramStage::StageKey GrGLLightingEffect::GenKey( |
| 1054 | const GrCustomStage& s) { |
| 1055 | return static_cast<const GrLightingEffect&>(s).light()->type(); |
| 1056 | } |
| 1057 | |
| 1058 | void GrGLLightingEffect::setData(const GrGLInterface* gl, |
| 1059 | const GrGLTexture& texture, |
| 1060 | const GrCustomStage& data, |
| 1061 | int stageNum) { |
| 1062 | const GrLightingEffect& effect = |
| 1063 | static_cast<const GrLightingEffect&>(data); |
| 1064 | GR_GL_CALL(gl, Uniform2f(fImageIncrementLocation, 1.0f / texture.width(), 1.0f / texture.height())); |
| 1065 | GR_GL_CALL(gl, Uniform1f(fSurfaceScaleLocation, effect.surfaceScale())); |
| 1066 | fLight->setData(gl, effect.light()); |
| 1067 | } |
| 1068 | |
| 1069 | /////////////////////////////////////////////////////////////////////////////// |
| 1070 | |
| 1071 | /////////////////////////////////////////////////////////////////////////////// |
| 1072 | |
| 1073 | GrGLDiffuseLightingEffect::GrGLDiffuseLightingEffect(const GrProgramStageFactory& factory, |
| 1074 | const GrCustomStage& stage) |
| 1075 | : INHERITED(factory, stage) |
| 1076 | , fKDVar(NULL) |
| 1077 | , fKDLocation(0) { |
| 1078 | } |
| 1079 | |
| 1080 | void GrGLDiffuseLightingEffect::setupVariables(GrGLShaderBuilder* state, int stage) { |
| 1081 | INHERITED::setupVariables(state, stage); |
| 1082 | fKDVar = &state->addUniform( |
| 1083 | GrGLShaderBuilder::kFragment_ShaderType, |
| 1084 | kFloat_GrSLType, "uKD", stage); |
| 1085 | } |
| 1086 | |
| 1087 | void GrGLDiffuseLightingEffect::initUniforms(const GrGLInterface* gl, |
| 1088 | int programID) { |
| 1089 | INHERITED::initUniforms(gl, programID); |
| 1090 | GR_GL_CALL_RET(gl, fKDLocation, |
| 1091 | GetUniformLocation(programID, |
| 1092 | fKDVar->getName().c_str())); |
| 1093 | } |
| 1094 | |
| 1095 | void GrGLDiffuseLightingEffect::emitLightFunc(SkString* funcs) { |
| 1096 | funcs->appendf("vec4 light(vec3 normal, vec3 surfaceToLight, vec3 lightColor) {\n"); |
| 1097 | funcs->appendf("\tfloat colorScale = %s * dot(normal, surfaceToLight);\n", fKDVar->getName().c_str()); |
| 1098 | funcs->appendf("\treturn vec4(lightColor * clamp(colorScale, 0, 1), 1);\n"); |
| 1099 | funcs->appendf("}\n"); |
| 1100 | } |
| 1101 | |
| 1102 | void GrGLDiffuseLightingEffect::setData(const GrGLInterface* gl, |
| 1103 | const GrGLTexture& texture, |
| 1104 | const GrCustomStage& data, |
| 1105 | int stageNum) { |
| 1106 | INHERITED::setData(gl, texture, data, stageNum); |
| 1107 | const GrDiffuseLightingEffect& effect = |
| 1108 | static_cast<const GrDiffuseLightingEffect&>(data); |
| 1109 | GR_GL_CALL(gl, Uniform1f(fKDLocation, effect.kd())); |
| 1110 | } |
| 1111 | |
| 1112 | /////////////////////////////////////////////////////////////////////////////// |
| 1113 | |
| 1114 | GrSpecularLightingEffect::GrSpecularLightingEffect(const SkLight* light, SkScalar surfaceScale, SkScalar ks, SkScalar shininess) |
| 1115 | : INHERITED(light, surfaceScale), |
| 1116 | fKS(ks), |
| 1117 | fShininess(shininess) { |
| 1118 | } |
| 1119 | |
| 1120 | const GrProgramStageFactory& GrSpecularLightingEffect::getFactory() const { |
| 1121 | return GrTProgramStageFactory<GrSpecularLightingEffect>::getInstance(); |
| 1122 | } |
| 1123 | |
| 1124 | bool GrSpecularLightingEffect::isEqual(const GrCustomStage& sBase) const { |
| 1125 | const GrSpecularLightingEffect& s = |
| 1126 | static_cast<const GrSpecularLightingEffect&>(sBase); |
| 1127 | return INHERITED::isEqual(sBase) && |
| 1128 | this->ks() == s.ks() && |
| 1129 | this->shininess() == s.shininess(); |
| 1130 | } |
| 1131 | |
| 1132 | /////////////////////////////////////////////////////////////////////////////// |
| 1133 | |
| 1134 | GrGLSpecularLightingEffect::GrGLSpecularLightingEffect(const GrProgramStageFactory& factory, |
| 1135 | const GrCustomStage& stage) |
| 1136 | : GrGLLightingEffect(factory, stage) |
| 1137 | , fKSVar(NULL) |
| 1138 | , fKSLocation(0) |
| 1139 | , fShininessVar(NULL) |
| 1140 | , fShininessLocation(0) { |
| 1141 | } |
| 1142 | |
| 1143 | void GrGLSpecularLightingEffect::setupVariables(GrGLShaderBuilder* state, int stage) { |
| 1144 | INHERITED::setupVariables(state, stage); |
| 1145 | fKSVar = &state->addUniform( |
| 1146 | GrGLShaderBuilder::kFragment_ShaderType, |
| 1147 | kFloat_GrSLType, "uKS", stage); |
| 1148 | fShininessVar = &state->addUniform( |
| 1149 | GrGLShaderBuilder::kFragment_ShaderType, |
| 1150 | kFloat_GrSLType, "uShininess", stage); |
| 1151 | } |
| 1152 | |
| 1153 | void GrGLSpecularLightingEffect::initUniforms(const GrGLInterface* gl, |
| 1154 | int programID) { |
| 1155 | INHERITED::initUniforms(gl, programID); |
| 1156 | GR_GL_CALL_RET(gl, fKSLocation, |
| 1157 | GetUniformLocation(programID, fKSVar->getName().c_str())); |
| 1158 | GR_GL_CALL_RET(gl, fShininessLocation, |
| 1159 | GetUniformLocation(programID, fShininessVar->getName().c_str())); |
| 1160 | } |
| 1161 | |
| 1162 | void GrGLSpecularLightingEffect::emitLightFunc(SkString* funcs) { |
| 1163 | funcs->appendf("vec4 light(vec3 normal, vec3 surfaceToLight, vec3 lightColor) {\n"); |
| 1164 | funcs->appendf("\tvec3 halfDir = vec3(normalize(surfaceToLight + vec3(0, 0, 1)));\n"); |
| 1165 | |
| 1166 | funcs->appendf("\tfloat colorScale = %s * pow(dot(normal, halfDir), %s);\n", |
| 1167 | fKSVar->getName().c_str(), fShininessVar->getName().c_str()); |
| 1168 | funcs->appendf("\treturn vec4(lightColor * clamp(colorScale, 0, 1), 1);\n"); |
| 1169 | funcs->appendf("}\n"); |
| 1170 | } |
| 1171 | |
| 1172 | void GrGLSpecularLightingEffect::setData(const GrGLInterface* gl, |
| 1173 | const GrGLTexture& texture, |
| 1174 | const GrCustomStage& data, |
| 1175 | int stageNum) { |
| 1176 | INHERITED::setData(gl, texture, data, stageNum); |
| 1177 | const GrSpecularLightingEffect& effect = |
| 1178 | static_cast<const GrSpecularLightingEffect&>(data); |
| 1179 | GR_GL_CALL(gl, Uniform1f(fKSLocation, effect.ks())); |
| 1180 | GR_GL_CALL(gl, Uniform1f(fShininessLocation, effect.shininess())); |
| 1181 | } |
| 1182 | |
| 1183 | /////////////////////////////////////////////////////////////////////////////// |
| 1184 | |
| 1185 | void GrGLLight::emitLightColor(SkString* builder, const char *surfaceToLight) const { |
| 1186 | builder->append(fColorVar->getName().c_str()); |
| 1187 | } |
| 1188 | |
| 1189 | void GrGLLight::setupVariables(GrGLShaderBuilder* state, int stage) { |
| 1190 | fColorVar = &state->addUniform( |
| 1191 | GrGLShaderBuilder::kFragment_ShaderType, |
| 1192 | kVec3f_GrSLType, "uLightColor", stage); |
| 1193 | } |
| 1194 | |
| 1195 | void GrGLLight::initUniforms(const GrGLInterface* gl, int programID) { |
| 1196 | GR_GL_CALL_RET(gl, fColorVarLocation, |
| 1197 | GetUniformLocation(programID, fColorVar->getName().c_str())); |
| 1198 | } |
| 1199 | |
| 1200 | void GrGLLight::setData(const GrGLInterface* gl, const SkLight* light) const { |
| 1201 | setUniformPoint3(gl, fColorVarLocation, light->color() * SkScalarInvert(SkIntToScalar(255))); |
| 1202 | } |
| 1203 | |
| 1204 | GrGLLight* SkDistantLight::createGLLight() const { |
| 1205 | return new GrGLDistantLight(); |
| 1206 | } |
| 1207 | |
| 1208 | /////////////////////////////////////////////////////////////////////////////// |
| 1209 | |
| 1210 | void GrGLDistantLight::setupVariables(GrGLShaderBuilder* state, int stage) { |
| 1211 | INHERITED::setupVariables(state, stage); |
| 1212 | fDirectionVar = &state->addUniform( |
| 1213 | GrGLShaderBuilder::kFragment_ShaderType, kVec3f_GrSLType, |
| 1214 | "uLightDirection", stage); |
| 1215 | } |
| 1216 | |
| 1217 | void GrGLDistantLight::initUniforms(const GrGLInterface* gl, int programID) { |
| 1218 | INHERITED::initUniforms(gl, programID); |
| 1219 | GR_GL_CALL_RET(gl, fDirectionLocation, |
| 1220 | GetUniformLocation(programID, fDirectionVar->getName().c_str())); |
| 1221 | } |
| 1222 | |
| 1223 | void GrGLDistantLight::setData(const GrGLInterface* gl, const SkLight* light) const { |
| 1224 | INHERITED::setData(gl, light); |
| 1225 | SkASSERT(light->type() == SkLight::kDistant_LightType); |
| 1226 | const SkDistantLight* distantLight = static_cast<const SkDistantLight*>(light); |
| 1227 | setUniformPoint3(gl, fDirectionLocation, distantLight->direction()); |
| 1228 | } |
| 1229 | |
| 1230 | void GrGLDistantLight::emitSurfaceToLight(SkString* builder, |
| 1231 | const char* z) const { |
| 1232 | builder->append(fDirectionVar->getName().c_str()); |
| 1233 | } |
| 1234 | |
| 1235 | /////////////////////////////////////////////////////////////////////////////// |
| 1236 | |
| 1237 | void GrGLPointLight::setupVariables(GrGLShaderBuilder* state, int stage) { |
| 1238 | INHERITED::setupVariables(state, stage); |
| 1239 | fLocationVar = &state->addUniform( |
| 1240 | GrGLShaderBuilder::kFragment_ShaderType, kVec3f_GrSLType, |
| 1241 | "uLightLocation", stage); |
| 1242 | state->addVarying(kFloat_GrSLType, "Height", stage, &fHeightVaryingName); |
| 1243 | } |
| 1244 | |
| 1245 | void GrGLPointLight::initUniforms(const GrGLInterface* gl, int programID) { |
| 1246 | INHERITED::initUniforms(gl, programID); |
| 1247 | GR_GL_CALL_RET(gl, fLocationLocation, |
| 1248 | GetUniformLocation(programID, fLocationVar->getName().c_str())); |
| 1249 | } |
| 1250 | |
| 1251 | void GrGLPointLight::setData(const GrGLInterface* gl, const SkLight* light) const { |
| 1252 | INHERITED::setData(gl, light); |
| 1253 | SkASSERT(light->type() == SkLight::kPoint_LightType); |
| 1254 | const SkPointLight* pointLight = static_cast<const SkPointLight*>(light); |
| 1255 | setUniformPoint3(gl, fLocationLocation, pointLight->location()); |
| 1256 | } |
| 1257 | |
| 1258 | void GrGLPointLight::emitVS(SkString* builder) const { |
| 1259 | // Compute viewport height from the Y scale of the matrix. |
| 1260 | builder->appendf("\t\t%s = -2.0 / uViewM[1][1];\n", fHeightVaryingName); |
| 1261 | } |
| 1262 | |
| 1263 | void GrGLPointLight::emitSurfaceToLight(SkString* builder, |
| 1264 | const char* z) const { |
| 1265 | builder->appendf( |
| 1266 | "normalize(%s - vec3(gl_FragCoord.x, %s - gl_FragCoord.y, %s))", |
| 1267 | fLocationVar->getName().c_str(), fHeightVaryingName, z); |
| 1268 | } |
| 1269 | |
| 1270 | /////////////////////////////////////////////////////////////////////////////// |
| 1271 | |
| 1272 | void GrGLSpotLight::setupVariables(GrGLShaderBuilder* state, int stage) { |
| 1273 | INHERITED::setupVariables(state, stage); |
| 1274 | fLocationVar = &state->addUniform( |
| 1275 | GrGLShaderBuilder::kFragment_ShaderType, |
| 1276 | kVec3f_GrSLType, "uLightLocation", stage); |
| 1277 | fExponentVar = &state->addUniform( |
| 1278 | GrGLShaderBuilder::kFragment_ShaderType, |
| 1279 | kFloat_GrSLType, "uExponent", stage); |
| 1280 | fCosInnerConeAngleVar = &state->addUniform( |
| 1281 | GrGLShaderBuilder::kFragment_ShaderType, |
| 1282 | kFloat_GrSLType, "uCosInnerConeAngle", stage); |
| 1283 | fCosOuterConeAngleVar = &state->addUniform( |
| 1284 | GrGLShaderBuilder::kFragment_ShaderType, |
| 1285 | kFloat_GrSLType, "uCosOuterConeAngle", stage); |
| 1286 | fConeScaleVar = &state->addUniform( |
| 1287 | GrGLShaderBuilder::kFragment_ShaderType, |
| 1288 | kFloat_GrSLType, "uConeScale", stage); |
| 1289 | fSVar = &state->addUniform( |
| 1290 | GrGLShaderBuilder::kFragment_ShaderType, |
| 1291 | kVec3f_GrSLType, "uS", stage); |
| 1292 | state->addVarying(kFloat_GrSLType, "Height", stage, &fHeightVaryingName); |
| 1293 | } |
| 1294 | |
| 1295 | void GrGLSpotLight::initUniforms(const GrGLInterface* gl, int programID) { |
| 1296 | INHERITED::initUniforms(gl, programID); |
| 1297 | GR_GL_CALL_RET(gl, fLocationLocation, |
| 1298 | GetUniformLocation(programID, fLocationVar->getName().c_str())); |
| 1299 | GR_GL_CALL_RET(gl, fExponentLocation, |
| 1300 | GetUniformLocation(programID, fExponentVar->getName().c_str())); |
| 1301 | GR_GL_CALL_RET(gl, fCosInnerConeAngleLocation, |
| 1302 | GetUniformLocation(programID, fCosInnerConeAngleVar->getName().c_str())); |
| 1303 | GR_GL_CALL_RET(gl, fCosOuterConeAngleLocation, |
| 1304 | GetUniformLocation(programID, fCosOuterConeAngleVar->getName().c_str())); |
| 1305 | GR_GL_CALL_RET(gl, fCosOuterConeAngleLocation, |
| 1306 | GetUniformLocation(programID, fCosOuterConeAngleVar->getName().c_str())); |
| 1307 | GR_GL_CALL_RET(gl, fConeScaleLocation, |
| 1308 | GetUniformLocation(programID, fConeScaleVar->getName().c_str())); |
| 1309 | GR_GL_CALL_RET(gl, fSLocation, |
| 1310 | GetUniformLocation(programID, fSVar->getName().c_str())); |
| 1311 | } |
| 1312 | |
| 1313 | void GrGLSpotLight::setData(const GrGLInterface* gl, const SkLight* light) const { |
| 1314 | INHERITED::setData(gl, light); |
| 1315 | SkASSERT(light->type() == SkLight::kSpot_LightType); |
| 1316 | const SkSpotLight* spotLight = static_cast<const SkSpotLight *>(light); |
| 1317 | setUniformPoint3(gl, fLocationLocation, spotLight->location()); |
| 1318 | GR_GL_CALL(gl, Uniform1f(fExponentLocation, spotLight->specularExponent())); |
| 1319 | GR_GL_CALL(gl, Uniform1f(fCosInnerConeAngleLocation, spotLight->cosInnerConeAngle())); |
| 1320 | GR_GL_CALL(gl, Uniform1f(fCosOuterConeAngleLocation, spotLight->cosOuterConeAngle())); |
| 1321 | GR_GL_CALL(gl, Uniform1f(fConeScaleLocation, spotLight->coneScale())); |
| 1322 | setUniformPoint3(gl, fSLocation, spotLight->s()); |
| 1323 | } |
| 1324 | |
| 1325 | void GrGLSpotLight::emitVS(SkString* builder) const { |
| 1326 | // Compute viewport height from the Y scale of the matrix. |
| 1327 | builder->appendf("\t\t%s = -2.0 / uViewM[1][1];\n", fHeightVaryingName); |
| 1328 | } |
| 1329 | |
| 1330 | void GrGLSpotLight::emitFuncs(SkString* builder) const { |
| 1331 | builder->appendf("vec3 lightColor(vec3 surfaceToLight) {\n"); |
| 1332 | builder->appendf("\tfloat cosAngle = -dot(surfaceToLight, %s);\n", fSVar->getName().c_str()); |
| 1333 | builder->appendf("\tif (cosAngle < %s) {\n", fCosOuterConeAngleVar->getName().c_str()); |
| 1334 | builder->appendf("\t\treturn vec3(0);\n"); |
| 1335 | builder->appendf("\t}\n"); |
| 1336 | builder->appendf("\tfloat scale = pow(cosAngle, %s);\n", fExponentVar->getName().c_str()); |
| 1337 | builder->appendf("\tif (cosAngle < %s) {\n", fCosInnerConeAngleVar->getName().c_str()); |
| 1338 | builder->appendf("\t\treturn %s * scale * (cosAngle - %s) * %s;\n", fColorVar->getName().c_str(), fCosOuterConeAngleVar->getName().c_str(), fConeScaleVar->getName().c_str()); |
| 1339 | builder->appendf("\t}\n"); |
| 1340 | builder->appendf("\treturn %s;\n", fColorVar->getName().c_str()); |
| 1341 | builder->appendf("}\n"); |
| 1342 | } |
| 1343 | |
| 1344 | void GrGLSpotLight::emitSurfaceToLight(SkString* builder, const char* z) const { |
| 1345 | builder->appendf("normalize(%s - vec3(gl_FragCoord.x, %s - gl_FragCoord.y, %s))", fLocationVar->getName().c_str(), fHeightVaryingName, z); |
| 1346 | } |
| 1347 | |
| 1348 | void GrGLSpotLight::emitLightColor(SkString* builder, const char *surfaceToLight) const { |
| 1349 | builder->appendf("lightColor(%s)", surfaceToLight); |
| 1350 | } |
| 1351 | |
djsollen@google.com | 0833777 | 2012-06-26 14:33:13 +0000 | [diff] [blame] | 1352 | SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkLightingImageFilter) |
| 1353 | SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkDiffuseLightingImageFilter) |
| 1354 | SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkSpecularLightingImageFilter) |
| 1355 | SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkDistantLight) |
| 1356 | SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkPointLight) |
| 1357 | SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkSpotLight) |
| 1358 | SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END |