tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2011 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 | #ifndef GrDrawState_DEFINED |
| 9 | #define GrDrawState_DEFINED |
| 10 | |
| 11 | #include "GrColor.h" |
| 12 | #include "GrMatrix.h" |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 13 | #include "GrNoncopyable.h" |
bsalomon@google.com | 2e3d144 | 2012-03-26 20:33:54 +0000 | [diff] [blame] | 14 | #include "GrRefCnt.h" |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 15 | #include "GrSamplerState.h" |
| 16 | #include "GrStencil.h" |
| 17 | |
| 18 | #include "SkXfermode.h" |
| 19 | |
| 20 | class GrRenderTarget; |
| 21 | class GrTexture; |
| 22 | |
bsalomon@google.com | 2e3d144 | 2012-03-26 20:33:54 +0000 | [diff] [blame] | 23 | class GrDrawState : public GrRefCnt { |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 24 | |
bsalomon@google.com | 2e3d144 | 2012-03-26 20:33:54 +0000 | [diff] [blame] | 25 | public: |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 26 | /** |
| 27 | * Number of texture stages. Each stage takes as input a color and |
| 28 | * 2D texture coordinates. The color input to the first enabled stage is the |
| 29 | * per-vertex color or the constant color (setColor/setAlpha) if there are |
| 30 | * no per-vertex colors. For subsequent stages the input color is the output |
| 31 | * color from the previous enabled stage. The output color of each stage is |
| 32 | * the input color modulated with the result of a texture lookup. Texture |
| 33 | * lookups are specified by a texture a sampler (setSamplerState). Texture |
| 34 | * coordinates for each stage come from the vertices based on a |
| 35 | * GrVertexLayout bitfield. The output fragment color is the output color of |
| 36 | * the last enabled stage. The presence or absence of texture coordinates |
| 37 | * for each stage in the vertex layout indicates whether a stage is enabled |
| 38 | * or not. |
robertphillips@google.com | bf5cad4 | 2012-05-10 12:40:40 +0000 | [diff] [blame^] | 39 | * |
| 40 | * Stages 0 through GrPaint::kTotalStages-1 are reserved for setting up |
| 41 | * the draw (i.e., textures and filter masks). Stages GrPaint::kTotalStages |
| 42 | * through kNumStages-1 are earmarked for use by GrTextContext and |
| 43 | * GrPathRenderer-derived classes. |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 44 | */ |
| 45 | enum { |
robertphillips@google.com | ec05eaa | 2012-04-27 18:59:52 +0000 | [diff] [blame] | 46 | kNumStages = 4, |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 47 | kMaxTexCoords = kNumStages |
| 48 | }; |
| 49 | |
bsalomon@google.com | 39ee0ff | 2011-12-06 15:32:52 +0000 | [diff] [blame] | 50 | /** |
| 51 | * Bitfield used to indicate a set of stages. |
| 52 | */ |
| 53 | typedef uint32_t StageMask; |
| 54 | GR_STATIC_ASSERT(sizeof(StageMask)*8 >= GrDrawState::kNumStages); |
| 55 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 56 | GrDrawState() { |
bsalomon@google.com | 52a5dcb | 2012-01-17 16:01:37 +0000 | [diff] [blame] | 57 | this->reset(); |
| 58 | } |
bsalomon@google.com | 46f7afb | 2012-01-18 19:51:55 +0000 | [diff] [blame] | 59 | |
| 60 | GrDrawState(const GrDrawState& state) { |
| 61 | *this = state; |
| 62 | } |
| 63 | |
bsalomon@google.com | 52a5dcb | 2012-01-17 16:01:37 +0000 | [diff] [blame] | 64 | /** |
| 65 | * Resets to the default state. Sampler states will not be modified. |
| 66 | */ |
| 67 | void reset() { |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 68 | // make sure any pad is zero for memcmp |
bsalomon@google.com | 52a5dcb | 2012-01-17 16:01:37 +0000 | [diff] [blame] | 69 | // all GrDrawState members should default to something valid by the |
| 70 | // the memset except those initialized individually below. There should |
| 71 | // be no padding between the individually initialized members. |
bsalomon@google.com | 2e3d144 | 2012-03-26 20:33:54 +0000 | [diff] [blame] | 72 | memset(this->podStart(), 0, this->memsetSize()); |
| 73 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 74 | // pedantic assertion that our ptrs will |
| 75 | // be NULL (0 ptr is mem addr 0) |
| 76 | GrAssert((intptr_t)(void*)NULL == 0LL); |
bsalomon@google.com | 52a5dcb | 2012-01-17 16:01:37 +0000 | [diff] [blame] | 77 | GR_STATIC_ASSERT(0 == kBoth_DrawFace); |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 78 | GrAssert(fStencilSettings.isDisabled()); |
bsalomon@google.com | 52a5dcb | 2012-01-17 16:01:37 +0000 | [diff] [blame] | 79 | |
| 80 | // memset exceptions |
| 81 | fColor = 0xffffffff; |
bsalomon@google.com | 2401ae8 | 2012-01-17 21:03:05 +0000 | [diff] [blame] | 82 | fCoverage = 0xffffffff; |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 83 | fFirstCoverageStage = kNumStages; |
bsalomon@google.com | 52a5dcb | 2012-01-17 16:01:37 +0000 | [diff] [blame] | 84 | fColorFilterMode = SkXfermode::kDst_Mode; |
| 85 | fSrcBlend = kOne_BlendCoeff; |
| 86 | fDstBlend = kZero_BlendCoeff; |
| 87 | fViewMatrix.reset(); |
robertphillips@google.com | 28b4bce | 2012-05-04 16:34:52 +0000 | [diff] [blame] | 88 | fBehaviorBits = 0; |
bsalomon@google.com | 52a5dcb | 2012-01-17 16:01:37 +0000 | [diff] [blame] | 89 | |
| 90 | // ensure values that will be memcmp'ed in == but not memset in reset() |
| 91 | // are tightly packed |
bsalomon@google.com | 2e3d144 | 2012-03-26 20:33:54 +0000 | [diff] [blame] | 92 | GrAssert(this->memsetSize() + sizeof(fColor) + sizeof(fCoverage) + |
bsalomon@google.com | 2401ae8 | 2012-01-17 21:03:05 +0000 | [diff] [blame] | 93 | sizeof(fFirstCoverageStage) + sizeof(fColorFilterMode) + |
bsalomon@google.com | 8fe84b5 | 2012-03-26 15:24:27 +0000 | [diff] [blame] | 94 | sizeof(fSrcBlend) + sizeof(fDstBlend) == |
bsalomon@google.com | 2e3d144 | 2012-03-26 20:33:54 +0000 | [diff] [blame] | 95 | this->podSize()); |
bsalomon@google.com | 52a5dcb | 2012-01-17 16:01:37 +0000 | [diff] [blame] | 96 | |
| 97 | fEdgeAANumEdges = 0; |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 98 | } |
| 99 | |
| 100 | /////////////////////////////////////////////////////////////////////////// |
| 101 | /// @name Color |
| 102 | //// |
| 103 | |
| 104 | /** |
| 105 | * Sets color for next draw to a premultiplied-alpha color. |
| 106 | * |
| 107 | * @param color the color to set. |
| 108 | */ |
| 109 | void setColor(GrColor color) { fColor = color; } |
| 110 | |
| 111 | GrColor getColor() const { return fColor; } |
| 112 | |
| 113 | /** |
| 114 | * Sets the color to be used for the next draw to be |
| 115 | * (r,g,b,a) = (alpha, alpha, alpha, alpha). |
| 116 | * |
| 117 | * @param alpha The alpha value to set as the color. |
| 118 | */ |
| 119 | void setAlpha(uint8_t a) { |
| 120 | this->setColor((a << 24) | (a << 16) | (a << 8) | a); |
| 121 | } |
| 122 | |
| 123 | /** |
| 124 | * Add a color filter that can be represented by a color and a mode. Applied |
| 125 | * after color-computing texture stages. |
| 126 | */ |
| 127 | void setColorFilter(GrColor c, SkXfermode::Mode mode) { |
| 128 | fColorFilterColor = c; |
| 129 | fColorFilterMode = mode; |
| 130 | } |
| 131 | |
| 132 | GrColor getColorFilterColor() const { return fColorFilterColor; } |
| 133 | SkXfermode::Mode getColorFilterMode() const { return fColorFilterMode; } |
| 134 | |
| 135 | /// @} |
| 136 | |
| 137 | /////////////////////////////////////////////////////////////////////////// |
bsalomon@google.com | 2401ae8 | 2012-01-17 21:03:05 +0000 | [diff] [blame] | 138 | /// @name Coverage |
| 139 | //// |
| 140 | |
| 141 | /** |
| 142 | * Sets a constant fractional coverage to be applied to the draw. The |
| 143 | * initial value (after construction or reset()) is 0xff. The constant |
| 144 | * coverage is ignored when per-vertex coverage is provided. |
| 145 | */ |
| 146 | void setCoverage(uint8_t coverage) { |
| 147 | fCoverage = GrColorPackRGBA(coverage, coverage, coverage, coverage); |
| 148 | } |
| 149 | |
| 150 | /** |
| 151 | * Version of above that specifies 4 channel per-vertex color. The value |
| 152 | * should be premultiplied. |
| 153 | */ |
| 154 | void setCoverage4(GrColor coverage) { |
| 155 | fCoverage = coverage; |
| 156 | } |
| 157 | |
| 158 | GrColor getCoverage() const { |
| 159 | return fCoverage; |
| 160 | } |
| 161 | |
| 162 | /// @} |
| 163 | |
| 164 | /////////////////////////////////////////////////////////////////////////// |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 165 | /// @name Textures |
| 166 | //// |
| 167 | |
| 168 | /** |
| 169 | * Sets the texture used at the next drawing call |
| 170 | * |
| 171 | * @param stage The texture stage for which the texture will be set |
| 172 | * |
| 173 | * @param texture The texture to set. Can be NULL though there is no |
| 174 | * advantage to settings a NULL texture if doing non-textured drawing |
| 175 | */ |
| 176 | void setTexture(int stage, GrTexture* texture) { |
| 177 | GrAssert((unsigned)stage < kNumStages); |
robertphillips@google.com | 1942c05 | 2012-05-03 17:58:27 +0000 | [diff] [blame] | 178 | |
robertphillips@google.com | 28b4bce | 2012-05-04 16:34:52 +0000 | [diff] [blame] | 179 | if (isBehaviorEnabled(kTexturesNeedRef_BehaviorBit)) { |
robertphillips@google.com | 1942c05 | 2012-05-03 17:58:27 +0000 | [diff] [blame] | 180 | // If we don't clear out the current texture before unreffing |
| 181 | // it we can get into an infinite loop as the GrGLTexture's |
| 182 | // onRelease method recursively calls setTexture |
| 183 | GrTexture* temp = fTextures[stage]; |
| 184 | fTextures[stage] = NULL; |
| 185 | |
| 186 | SkSafeRef(texture); |
| 187 | SkSafeUnref(temp); |
| 188 | } |
| 189 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 190 | fTextures[stage] = texture; |
| 191 | } |
| 192 | |
| 193 | /** |
| 194 | * Retrieves the currently set texture. |
| 195 | * |
| 196 | * @return The currently set texture. The return value will be NULL if no |
| 197 | * texture has been set, NULL was most recently passed to |
| 198 | * setTexture, or the last setTexture was destroyed. |
| 199 | */ |
| 200 | const GrTexture* getTexture(int stage) const { |
| 201 | GrAssert((unsigned)stage < kNumStages); |
| 202 | return fTextures[stage]; |
| 203 | } |
| 204 | GrTexture* getTexture(int stage) { |
| 205 | GrAssert((unsigned)stage < kNumStages); |
| 206 | return fTextures[stage]; |
| 207 | } |
| 208 | |
| 209 | /// @} |
| 210 | |
| 211 | /////////////////////////////////////////////////////////////////////////// |
| 212 | /// @name Samplers |
| 213 | //// |
| 214 | |
| 215 | /** |
| 216 | * Returns the current sampler for a stage. |
| 217 | */ |
| 218 | const GrSamplerState& getSampler(int stage) const { |
| 219 | GrAssert((unsigned)stage < kNumStages); |
| 220 | return fSamplerStates[stage]; |
| 221 | } |
| 222 | |
| 223 | /** |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 224 | * Writable pointer to a stage's sampler. |
| 225 | */ |
| 226 | GrSamplerState* sampler(int stage) { |
| 227 | GrAssert((unsigned)stage < kNumStages); |
| 228 | return fSamplerStates + stage; |
| 229 | } |
| 230 | |
| 231 | /** |
| 232 | * Preconcats the matrix of all samplers in the mask with the same matrix. |
| 233 | */ |
| 234 | void preConcatSamplerMatrices(StageMask stageMask, const GrMatrix& matrix) { |
| 235 | GrAssert(!(stageMask & kIllegalStageMaskBits)); |
| 236 | for (int i = 0; i < kNumStages; ++i) { |
| 237 | if ((1 << i) & stageMask) { |
| 238 | fSamplerStates[i].preConcatMatrix(matrix); |
| 239 | } |
| 240 | } |
| 241 | } |
| 242 | |
| 243 | /// @} |
| 244 | |
| 245 | /////////////////////////////////////////////////////////////////////////// |
| 246 | /// @name Coverage / Color Stages |
| 247 | //// |
| 248 | |
| 249 | /** |
| 250 | * A common pattern is to compute a color with the initial stages and then |
| 251 | * modulate that color by a coverage value in later stage(s) (AA, mask- |
| 252 | * filters, glyph mask, etc). Color-filters, xfermodes, etc should be |
| 253 | * computed based on the pre-coverage-modulated color. The division of |
| 254 | * stages between color-computing and coverage-computing is specified by |
| 255 | * this method. Initially this is kNumStages (all stages |
| 256 | * are color-computing). |
| 257 | */ |
| 258 | void setFirstCoverageStage(int firstCoverageStage) { |
| 259 | GrAssert((unsigned)firstCoverageStage <= kNumStages); |
| 260 | fFirstCoverageStage = firstCoverageStage; |
| 261 | } |
| 262 | |
| 263 | /** |
| 264 | * Gets the index of the first coverage-computing stage. |
| 265 | */ |
| 266 | int getFirstCoverageStage() const { |
| 267 | return fFirstCoverageStage; |
| 268 | } |
| 269 | |
| 270 | ///@} |
| 271 | |
| 272 | /////////////////////////////////////////////////////////////////////////// |
| 273 | /// @name Blending |
| 274 | //// |
| 275 | |
| 276 | /** |
| 277 | * Sets the blending function coeffecients. |
| 278 | * |
| 279 | * The blend function will be: |
| 280 | * D' = sat(S*srcCoef + D*dstCoef) |
| 281 | * |
| 282 | * where D is the existing destination color, S is the incoming source |
| 283 | * color, and D' is the new destination color that will be written. sat() |
| 284 | * is the saturation function. |
| 285 | * |
| 286 | * @param srcCoef coeffecient applied to the src color. |
| 287 | * @param dstCoef coeffecient applied to the dst color. |
| 288 | */ |
| 289 | void setBlendFunc(GrBlendCoeff srcCoeff, GrBlendCoeff dstCoeff) { |
| 290 | fSrcBlend = srcCoeff; |
| 291 | fDstBlend = dstCoeff; |
| 292 | #if GR_DEBUG |
| 293 | switch (dstCoeff) { |
| 294 | case kDC_BlendCoeff: |
| 295 | case kIDC_BlendCoeff: |
| 296 | case kDA_BlendCoeff: |
| 297 | case kIDA_BlendCoeff: |
| 298 | GrPrintf("Unexpected dst blend coeff. Won't work correctly with" |
| 299 | "coverage stages.\n"); |
| 300 | break; |
| 301 | default: |
| 302 | break; |
| 303 | } |
| 304 | switch (srcCoeff) { |
| 305 | case kSC_BlendCoeff: |
| 306 | case kISC_BlendCoeff: |
| 307 | case kSA_BlendCoeff: |
| 308 | case kISA_BlendCoeff: |
| 309 | GrPrintf("Unexpected src blend coeff. Won't work correctly with" |
| 310 | "coverage stages.\n"); |
| 311 | break; |
| 312 | default: |
| 313 | break; |
| 314 | } |
| 315 | #endif |
| 316 | } |
| 317 | |
| 318 | GrBlendCoeff getSrcBlendCoeff() const { return fSrcBlend; } |
| 319 | GrBlendCoeff getDstBlendCoeff() const { return fDstBlend; } |
| 320 | |
| 321 | void getDstBlendCoeff(GrBlendCoeff* srcBlendCoeff, |
| 322 | GrBlendCoeff* dstBlendCoeff) const { |
| 323 | *srcBlendCoeff = fSrcBlend; |
| 324 | *dstBlendCoeff = fDstBlend; |
| 325 | } |
| 326 | |
| 327 | /** |
| 328 | * Sets the blending function constant referenced by the following blending |
| 329 | * coeffecients: |
| 330 | * kConstC_BlendCoeff |
| 331 | * kIConstC_BlendCoeff |
| 332 | * kConstA_BlendCoeff |
| 333 | * kIConstA_BlendCoeff |
| 334 | * |
| 335 | * @param constant the constant to set |
| 336 | */ |
| 337 | void setBlendConstant(GrColor constant) { fBlendConstant = constant; } |
| 338 | |
| 339 | /** |
| 340 | * Retrieves the last value set by setBlendConstant() |
| 341 | * @return the blending constant value |
| 342 | */ |
| 343 | GrColor getBlendConstant() const { return fBlendConstant; } |
| 344 | |
| 345 | /// @} |
| 346 | |
| 347 | /////////////////////////////////////////////////////////////////////////// |
| 348 | /// @name View Matrix |
| 349 | //// |
| 350 | |
| 351 | /** |
robertphillips@google.com | a72eef3 | 2012-05-01 17:22:59 +0000 | [diff] [blame] | 352 | * Sets the matrix applied to vertex positions. |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 353 | * |
| 354 | * In the post-view-matrix space the rectangle [0,w]x[0,h] |
| 355 | * fully covers the render target. (w and h are the width and height of the |
| 356 | * the rendertarget.) |
| 357 | */ |
| 358 | void setViewMatrix(const GrMatrix& m) { fViewMatrix = m; } |
| 359 | |
| 360 | /** |
| 361 | * Gets a writable pointer to the view matrix. |
| 362 | */ |
| 363 | GrMatrix* viewMatrix() { return &fViewMatrix; } |
| 364 | |
| 365 | /** |
| 366 | * Multiplies the current view matrix by a matrix |
| 367 | * |
| 368 | * After this call V' = V*m where V is the old view matrix, |
| 369 | * m is the parameter to this function, and V' is the new view matrix. |
| 370 | * (We consider positions to be column vectors so position vector p is |
| 371 | * transformed by matrix X as p' = X*p.) |
| 372 | * |
| 373 | * @param m the matrix used to modify the view matrix. |
| 374 | */ |
| 375 | void preConcatViewMatrix(const GrMatrix& m) { fViewMatrix.preConcat(m); } |
| 376 | |
| 377 | /** |
| 378 | * Multiplies the current view matrix by a matrix |
| 379 | * |
| 380 | * After this call V' = m*V where V is the old view matrix, |
| 381 | * m is the parameter to this function, and V' is the new view matrix. |
| 382 | * (We consider positions to be column vectors so position vector p is |
| 383 | * transformed by matrix X as p' = X*p.) |
| 384 | * |
| 385 | * @param m the matrix used to modify the view matrix. |
| 386 | */ |
| 387 | void postConcatViewMatrix(const GrMatrix& m) { fViewMatrix.postConcat(m); } |
| 388 | |
| 389 | /** |
| 390 | * Retrieves the current view matrix |
| 391 | * @return the current view matrix. |
| 392 | */ |
| 393 | const GrMatrix& getViewMatrix() const { return fViewMatrix; } |
| 394 | |
| 395 | /** |
| 396 | * Retrieves the inverse of the current view matrix. |
| 397 | * |
| 398 | * If the current view matrix is invertible, return true, and if matrix |
| 399 | * is non-null, copy the inverse into it. If the current view matrix is |
| 400 | * non-invertible, return false and ignore the matrix parameter. |
| 401 | * |
| 402 | * @param matrix if not null, will receive a copy of the current inverse. |
| 403 | */ |
| 404 | bool getViewInverse(GrMatrix* matrix) const { |
| 405 | // TODO: determine whether we really need to leave matrix unmodified |
| 406 | // at call sites when inversion fails. |
| 407 | GrMatrix inverse; |
| 408 | if (fViewMatrix.invert(&inverse)) { |
| 409 | if (matrix) { |
| 410 | *matrix = inverse; |
| 411 | } |
| 412 | return true; |
| 413 | } |
| 414 | return false; |
| 415 | } |
| 416 | |
| 417 | class AutoViewMatrixRestore : public ::GrNoncopyable { |
| 418 | public: |
| 419 | AutoViewMatrixRestore() : fDrawState(NULL) {} |
| 420 | AutoViewMatrixRestore(GrDrawState* ds, const GrMatrix& newMatrix) { |
| 421 | fDrawState = NULL; |
| 422 | this->set(ds, newMatrix); |
| 423 | } |
| 424 | AutoViewMatrixRestore(GrDrawState* ds) { |
| 425 | fDrawState = NULL; |
| 426 | this->set(ds); |
| 427 | } |
| 428 | ~AutoViewMatrixRestore() { |
| 429 | this->set(NULL, GrMatrix::I()); |
| 430 | } |
| 431 | void set(GrDrawState* ds, const GrMatrix& newMatrix) { |
| 432 | if (NULL != fDrawState) { |
| 433 | fDrawState->setViewMatrix(fSavedMatrix); |
| 434 | } |
| 435 | if (NULL != ds) { |
| 436 | fSavedMatrix = ds->getViewMatrix(); |
| 437 | ds->setViewMatrix(newMatrix); |
| 438 | } |
| 439 | fDrawState = ds; |
| 440 | } |
| 441 | void set(GrDrawState* ds) { |
| 442 | if (NULL != fDrawState) { |
| 443 | fDrawState->setViewMatrix(fSavedMatrix); |
| 444 | } |
| 445 | if (NULL != ds) { |
| 446 | fSavedMatrix = ds->getViewMatrix(); |
| 447 | } |
| 448 | fDrawState = ds; |
| 449 | } |
| 450 | private: |
| 451 | GrDrawState* fDrawState; |
| 452 | GrMatrix fSavedMatrix; |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 453 | }; |
| 454 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 455 | /// @} |
| 456 | |
| 457 | /////////////////////////////////////////////////////////////////////////// |
| 458 | /// @name Render Target |
| 459 | //// |
| 460 | |
| 461 | /** |
| 462 | * Sets the rendertarget used at the next drawing call |
| 463 | * |
| 464 | * @param target The render target to set. |
| 465 | */ |
| 466 | void setRenderTarget(GrRenderTarget* target) { fRenderTarget = target; } |
| 467 | |
| 468 | /** |
| 469 | * Retrieves the currently set rendertarget. |
| 470 | * |
| 471 | * @return The currently set render target. |
| 472 | */ |
| 473 | const GrRenderTarget* getRenderTarget() const { return fRenderTarget; } |
| 474 | GrRenderTarget* getRenderTarget() { return fRenderTarget; } |
| 475 | |
| 476 | class AutoRenderTargetRestore : public ::GrNoncopyable { |
| 477 | public: |
bsalomon@google.com | cadbcb8 | 2012-01-06 19:22:11 +0000 | [diff] [blame] | 478 | AutoRenderTargetRestore() : fDrawState(NULL), fSavedTarget(NULL) {} |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 479 | AutoRenderTargetRestore(GrDrawState* ds, GrRenderTarget* newTarget) { |
| 480 | fDrawState = NULL; |
robertphillips@google.com | 7460b37 | 2012-04-25 16:54:51 +0000 | [diff] [blame] | 481 | fSavedTarget = NULL; |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 482 | this->set(ds, newTarget); |
| 483 | } |
| 484 | ~AutoRenderTargetRestore() { this->set(NULL, NULL); } |
| 485 | void set(GrDrawState* ds, GrRenderTarget* newTarget) { |
| 486 | if (NULL != fDrawState) { |
| 487 | fDrawState->setRenderTarget(fSavedTarget); |
| 488 | } |
| 489 | if (NULL != ds) { |
| 490 | fSavedTarget = ds->getRenderTarget(); |
| 491 | ds->setRenderTarget(newTarget); |
| 492 | } |
| 493 | fDrawState = ds; |
| 494 | } |
| 495 | private: |
| 496 | GrDrawState* fDrawState; |
| 497 | GrRenderTarget* fSavedTarget; |
| 498 | }; |
| 499 | |
| 500 | /// @} |
| 501 | |
| 502 | /////////////////////////////////////////////////////////////////////////// |
| 503 | /// @name Stencil |
| 504 | //// |
| 505 | |
| 506 | /** |
| 507 | * Sets the stencil settings to use for the next draw. |
| 508 | * Changing the clip has the side-effect of possibly zeroing |
| 509 | * out the client settable stencil bits. So multipass algorithms |
| 510 | * using stencil should not change the clip between passes. |
| 511 | * @param settings the stencil settings to use. |
| 512 | */ |
| 513 | void setStencil(const GrStencilSettings& settings) { |
| 514 | fStencilSettings = settings; |
| 515 | } |
| 516 | |
| 517 | /** |
| 518 | * Shortcut to disable stencil testing and ops. |
| 519 | */ |
| 520 | void disableStencil() { |
| 521 | fStencilSettings.setDisabled(); |
| 522 | } |
| 523 | |
| 524 | const GrStencilSettings& getStencil() const { return fStencilSettings; } |
| 525 | |
| 526 | GrStencilSettings* stencil() { return &fStencilSettings; } |
| 527 | |
| 528 | /// @} |
| 529 | |
| 530 | /////////////////////////////////////////////////////////////////////////// |
senorblanco@chromium.org | 50bdad8 | 2012-01-03 20:51:57 +0000 | [diff] [blame] | 531 | /// @name Color Matrix |
| 532 | //// |
| 533 | |
| 534 | /** |
| 535 | * Sets the color matrix to use for the next draw. |
| 536 | * @param matrix the 5x4 matrix to apply to the incoming color |
| 537 | */ |
| 538 | void setColorMatrix(const float matrix[20]) { |
| 539 | memcpy(fColorMatrix, matrix, sizeof(fColorMatrix)); |
| 540 | } |
| 541 | |
| 542 | const float* getColorMatrix() const { return fColorMatrix; } |
| 543 | |
| 544 | /// @} |
| 545 | |
| 546 | /////////////////////////////////////////////////////////////////////////// |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 547 | // @name Edge AA |
| 548 | // There are two ways to perform antialiasing using edge equations. One |
| 549 | // is to specify an (linear or quadratic) edge eq per-vertex. This requires |
| 550 | // splitting vertices shared by primitives. |
| 551 | // |
| 552 | // The other is via setEdgeAAData which sets a set of edges and each |
| 553 | // is tested against all the edges. |
| 554 | //// |
| 555 | |
| 556 | /** |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 557 | * When specifying edges as vertex data this enum specifies what type of |
| 558 | * edges are in use. The edges are always 4 GrScalars in memory, even when |
| 559 | * the edge type requires fewer than 4. |
bsalomon@google.com | 93c9660 | 2012-04-27 13:05:21 +0000 | [diff] [blame] | 560 | * |
| 561 | * TODO: Fix the fact that HairLine and Circle edge types use y-down coords. |
| 562 | * (either adjust in VS or use origin_upper_left in GLSL) |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 563 | */ |
| 564 | enum VertexEdgeType { |
| 565 | /* 1-pixel wide line |
| 566 | 2D implicit line eq (a*x + b*y +c = 0). 4th component unused */ |
| 567 | kHairLine_EdgeType, |
bsalomon@google.com | 69cc6ad | 2012-01-17 14:25:10 +0000 | [diff] [blame] | 568 | /* Quadratic specified by u^2-v canonical coords (only 2 |
| 569 | components used). Coverage based on signed distance with negative |
bsalomon@google.com | 93c9660 | 2012-04-27 13:05:21 +0000 | [diff] [blame] | 570 | being inside, positive outside. Edge specified in window space |
| 571 | (y-down) */ |
bsalomon@google.com | 69cc6ad | 2012-01-17 14:25:10 +0000 | [diff] [blame] | 572 | kQuad_EdgeType, |
| 573 | /* Same as above but for hairline quadratics. Uses unsigned distance. |
| 574 | Coverage is min(0, 1-distance). */ |
| 575 | kHairQuad_EdgeType, |
bsalomon@google.com | 93c9660 | 2012-04-27 13:05:21 +0000 | [diff] [blame] | 576 | /* Circle specified as center_x, center_y, outer_radius, inner_radius |
| 577 | all in window space (y-down). */ |
| 578 | kCircle_EdgeType, |
bsalomon@google.com | 69cc6ad | 2012-01-17 14:25:10 +0000 | [diff] [blame] | 579 | |
| 580 | kVertexEdgeTypeCnt |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 581 | }; |
| 582 | |
| 583 | /** |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 584 | * Determines the interpretation per-vertex edge data when the |
| 585 | * kEdge_VertexLayoutBit is set (see GrDrawTarget). When per-vertex edges |
| 586 | * are not specified the value of this setting has no effect. |
| 587 | */ |
| 588 | void setVertexEdgeType(VertexEdgeType type) { |
bsalomon@google.com | 69cc6ad | 2012-01-17 14:25:10 +0000 | [diff] [blame] | 589 | GrAssert(type >=0 && type < kVertexEdgeTypeCnt); |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 590 | fVertexEdgeType = type; |
| 591 | } |
| 592 | |
bsalomon@google.com | 52a5dcb | 2012-01-17 16:01:37 +0000 | [diff] [blame] | 593 | VertexEdgeType getVertexEdgeType() const { return fVertexEdgeType; } |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 594 | |
| 595 | /** |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 596 | * The absolute maximum number of edges that may be specified for |
| 597 | * a single draw call when performing edge antialiasing. This is used for |
| 598 | * the size of several static buffers, so implementations of getMaxEdges() |
| 599 | * (below) should clamp to this value. |
| 600 | */ |
| 601 | enum { |
tomhudson@google.com | 62b0968 | 2011-11-09 16:39:17 +0000 | [diff] [blame] | 602 | // TODO: this should be 32 when GrTesselatedPathRenderer is used |
| 603 | // Visual Studio 2010 does not permit a member array of size 0. |
| 604 | kMaxEdges = 1 |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 605 | }; |
| 606 | |
| 607 | class Edge { |
| 608 | public: |
| 609 | Edge() {} |
| 610 | Edge(float x, float y, float z) : fX(x), fY(y), fZ(z) {} |
| 611 | GrPoint intersect(const Edge& other) { |
| 612 | return GrPoint::Make( |
bsalomon@google.com | 72e49b8 | 2011-10-27 21:47:03 +0000 | [diff] [blame] | 613 | SkFloatToScalar((fY * other.fZ - other.fY * fZ) / |
| 614 | (fX * other.fY - other.fX * fY)), |
| 615 | SkFloatToScalar((fX * other.fZ - other.fX * fZ) / |
| 616 | (other.fX * fY - fX * other.fY))); |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 617 | } |
| 618 | float fX, fY, fZ; |
| 619 | }; |
| 620 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 621 | /** |
| 622 | * Sets the edge data required for edge antialiasing. |
| 623 | * |
| 624 | * @param edges 3 * numEdges float values, representing the edge |
| 625 | * equations in Ax + By + C form |
| 626 | */ |
| 627 | void setEdgeAAData(const Edge* edges, int numEdges) { |
| 628 | GrAssert(numEdges <= GrDrawState::kMaxEdges); |
| 629 | memcpy(fEdgeAAEdges, edges, numEdges * sizeof(GrDrawState::Edge)); |
| 630 | fEdgeAANumEdges = numEdges; |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 631 | } |
| 632 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 633 | int getNumAAEdges() const { return fEdgeAANumEdges; } |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 634 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 635 | const Edge* getAAEdges() const { return fEdgeAAEdges; } |
tomhudson@google.com | 62b0968 | 2011-11-09 16:39:17 +0000 | [diff] [blame] | 636 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 637 | /// @} |
tomhudson@google.com | 62b0968 | 2011-11-09 16:39:17 +0000 | [diff] [blame] | 638 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 639 | /////////////////////////////////////////////////////////////////////////// |
| 640 | /// @name State Flags |
| 641 | //// |
tomhudson@google.com | 62b0968 | 2011-11-09 16:39:17 +0000 | [diff] [blame] | 642 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 643 | /** |
| 644 | * Flags that affect rendering. Controlled using enable/disableState(). All |
| 645 | * default to disabled. |
| 646 | */ |
| 647 | enum StateBits { |
| 648 | /** |
| 649 | * Perform dithering. TODO: Re-evaluate whether we need this bit |
| 650 | */ |
| 651 | kDither_StateBit = 0x01, |
| 652 | /** |
| 653 | * Perform HW anti-aliasing. This means either HW FSAA, if supported |
| 654 | * by the render target, or smooth-line rendering if a line primitive |
| 655 | * is drawn and line smoothing is supported by the 3D API. |
| 656 | */ |
| 657 | kHWAntialias_StateBit = 0x02, |
| 658 | /** |
| 659 | * Draws will respect the clip, otherwise the clip is ignored. |
| 660 | */ |
| 661 | kClip_StateBit = 0x04, |
| 662 | /** |
| 663 | * Disables writing to the color buffer. Useful when performing stencil |
| 664 | * operations. |
| 665 | */ |
| 666 | kNoColorWrites_StateBit = 0x08, |
| 667 | /** |
| 668 | * Modifies the behavior of edge AA specified by setEdgeAA. If set, |
| 669 | * will test edge pairs for convexity when rasterizing. Set this if the |
| 670 | * source polygon is non-convex. |
| 671 | */ |
| 672 | kEdgeAAConcave_StateBit = 0x10, |
senorblanco@chromium.org | 50bdad8 | 2012-01-03 20:51:57 +0000 | [diff] [blame] | 673 | /** |
| 674 | * Draws will apply the color matrix, otherwise the color matrix is |
| 675 | * ignored. |
| 676 | */ |
| 677 | kColorMatrix_StateBit = 0x20, |
tomhudson@google.com | 62b0968 | 2011-11-09 16:39:17 +0000 | [diff] [blame] | 678 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 679 | // Users of the class may add additional bits to the vector |
| 680 | kDummyStateBit, |
| 681 | kLastPublicStateBit = kDummyStateBit-1, |
| 682 | }; |
| 683 | |
| 684 | void resetStateFlags() { |
| 685 | fFlagBits = 0; |
| 686 | } |
| 687 | |
| 688 | /** |
| 689 | * Enable render state settings. |
| 690 | * |
| 691 | * @param flags bitfield of StateBits specifing the states to enable |
| 692 | */ |
| 693 | void enableState(uint32_t stateBits) { |
| 694 | fFlagBits |= stateBits; |
| 695 | } |
| 696 | |
| 697 | /** |
| 698 | * Disable render state settings. |
| 699 | * |
| 700 | * @param flags bitfield of StateBits specifing the states to disable |
| 701 | */ |
| 702 | void disableState(uint32_t stateBits) { |
| 703 | fFlagBits &= ~(stateBits); |
| 704 | } |
| 705 | |
| 706 | bool isDitherState() const { |
| 707 | return 0 != (fFlagBits & kDither_StateBit); |
| 708 | } |
| 709 | |
| 710 | bool isHWAntialiasState() const { |
| 711 | return 0 != (fFlagBits & kHWAntialias_StateBit); |
| 712 | } |
| 713 | |
| 714 | bool isClipState() const { |
| 715 | return 0 != (fFlagBits & kClip_StateBit); |
| 716 | } |
| 717 | |
| 718 | bool isColorWriteDisabled() const { |
| 719 | return 0 != (fFlagBits & kNoColorWrites_StateBit); |
| 720 | } |
| 721 | |
| 722 | bool isConcaveEdgeAAState() const { |
| 723 | return 0 != (fFlagBits & kEdgeAAConcave_StateBit); |
| 724 | } |
| 725 | |
| 726 | bool isStateFlagEnabled(uint32_t stateBit) const { |
| 727 | return 0 != (stateBit & fFlagBits); |
| 728 | } |
| 729 | |
| 730 | void copyStateFlags(const GrDrawState& ds) { |
| 731 | fFlagBits = ds.fFlagBits; |
| 732 | } |
| 733 | |
robertphillips@google.com | 28b4bce | 2012-05-04 16:34:52 +0000 | [diff] [blame] | 734 | /** |
| 735 | * Flags that do not affect rendering. |
| 736 | */ |
| 737 | enum GrBehaviorBits { |
| 738 | /** |
| 739 | * Calls to setTexture will ref/unref the texture |
| 740 | */ |
| 741 | kTexturesNeedRef_BehaviorBit = 0x01, |
| 742 | }; |
| 743 | |
| 744 | void enableBehavior(uint32_t behaviorBits) { |
| 745 | fBehaviorBits |= behaviorBits; |
| 746 | } |
| 747 | |
| 748 | void disableBehavior(uint32_t behaviorBits) { |
| 749 | fBehaviorBits &= ~(behaviorBits); |
| 750 | } |
| 751 | |
| 752 | bool isBehaviorEnabled(uint32_t behaviorBits) const { |
| 753 | return 0 != (behaviorBits & fBehaviorBits); |
| 754 | } |
| 755 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 756 | /// @} |
| 757 | |
| 758 | /////////////////////////////////////////////////////////////////////////// |
| 759 | /// @name Face Culling |
| 760 | //// |
| 761 | |
| 762 | enum DrawFace { |
| 763 | kBoth_DrawFace, |
| 764 | kCCW_DrawFace, |
| 765 | kCW_DrawFace, |
| 766 | }; |
| 767 | |
| 768 | /** |
| 769 | * Controls whether clockwise, counterclockwise, or both faces are drawn. |
| 770 | * @param face the face(s) to draw. |
| 771 | */ |
| 772 | void setDrawFace(DrawFace face) { |
| 773 | fDrawFace = face; |
| 774 | } |
| 775 | |
| 776 | /** |
| 777 | * Gets whether the target is drawing clockwise, counterclockwise, |
| 778 | * or both faces. |
| 779 | * @return the current draw face(s). |
| 780 | */ |
bsalomon@google.com | 52a5dcb | 2012-01-17 16:01:37 +0000 | [diff] [blame] | 781 | DrawFace getDrawFace() const { return fDrawFace; } |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 782 | |
| 783 | /// @} |
| 784 | |
| 785 | /////////////////////////////////////////////////////////////////////////// |
tomhudson@google.com | 62b0968 | 2011-11-09 16:39:17 +0000 | [diff] [blame] | 786 | |
bsalomon@google.com | 3d0835b | 2011-12-08 16:12:03 +0000 | [diff] [blame] | 787 | // Most stages are usually not used, so conditionals here |
| 788 | // reduce the expected number of bytes touched by 50%. |
| 789 | bool operator ==(const GrDrawState& s) const { |
bsalomon@google.com | 2e3d144 | 2012-03-26 20:33:54 +0000 | [diff] [blame] | 790 | if (memcmp(this->podStart(), s.podStart(), this->podSize())) { |
bsalomon@google.com | 8fe84b5 | 2012-03-26 15:24:27 +0000 | [diff] [blame] | 791 | return false; |
| 792 | } |
| 793 | |
| 794 | if (!s.fViewMatrix.cheapEqualTo(fViewMatrix)) { |
| 795 | return false; |
| 796 | } |
bsalomon@google.com | 3d0835b | 2011-12-08 16:12:03 +0000 | [diff] [blame] | 797 | |
robertphillips@google.com | 28b4bce | 2012-05-04 16:34:52 +0000 | [diff] [blame] | 798 | // kTexturesNeedRef is an internal flag for altering the draw state's |
| 799 | // behavior rather than a property that will impact drawing - ignore it |
| 800 | // here |
| 801 | if ((fBehaviorBits & ~kTexturesNeedRef_BehaviorBit) != |
| 802 | (s.fBehaviorBits & ~kTexturesNeedRef_BehaviorBit)) { |
| 803 | return false; |
| 804 | } |
| 805 | |
bsalomon@google.com | 3d0835b | 2011-12-08 16:12:03 +0000 | [diff] [blame] | 806 | for (int i = 0; i < kNumStages; i++) { |
| 807 | if (fTextures[i] && |
tomhudson@google.com | 02b1ea2 | 2012-04-30 20:19:07 +0000 | [diff] [blame] | 808 | this->fSamplerStates[i] != s.fSamplerStates[i]) { |
bsalomon@google.com | 3d0835b | 2011-12-08 16:12:03 +0000 | [diff] [blame] | 809 | return false; |
| 810 | } |
| 811 | } |
bsalomon@google.com | 9b1517e | 2012-03-05 17:58:34 +0000 | [diff] [blame] | 812 | if (kColorMatrix_StateBit & s.fFlagBits) { |
| 813 | if (memcmp(fColorMatrix, |
| 814 | s.fColorMatrix, |
| 815 | sizeof(fColorMatrix))) { |
| 816 | return false; |
| 817 | } |
| 818 | } |
bsalomon@google.com | 3d0835b | 2011-12-08 16:12:03 +0000 | [diff] [blame] | 819 | |
| 820 | return true; |
| 821 | } |
| 822 | bool operator !=(const GrDrawState& s) const { return !(*this == s); } |
| 823 | |
| 824 | // Most stages are usually not used, so conditionals here |
| 825 | // reduce the expected number of bytes touched by 50%. |
| 826 | GrDrawState& operator =(const GrDrawState& s) { |
bsalomon@google.com | 2e3d144 | 2012-03-26 20:33:54 +0000 | [diff] [blame] | 827 | memcpy(this->podStart(), s.podStart(), this->podSize()); |
bsalomon@google.com | 3d0835b | 2011-12-08 16:12:03 +0000 | [diff] [blame] | 828 | |
bsalomon@google.com | 8fe84b5 | 2012-03-26 15:24:27 +0000 | [diff] [blame] | 829 | fViewMatrix = s.fViewMatrix; |
robertphillips@google.com | 28b4bce | 2012-05-04 16:34:52 +0000 | [diff] [blame] | 830 | fBehaviorBits = s.fBehaviorBits; |
bsalomon@google.com | 8fe84b5 | 2012-03-26 15:24:27 +0000 | [diff] [blame] | 831 | |
bsalomon@google.com | a5d056a | 2012-03-27 15:59:58 +0000 | [diff] [blame] | 832 | GrAssert(0 == s.fEdgeAANumEdges); |
| 833 | fEdgeAANumEdges = 0; |
| 834 | |
bsalomon@google.com | 3d0835b | 2011-12-08 16:12:03 +0000 | [diff] [blame] | 835 | for (int i = 0; i < kNumStages; i++) { |
| 836 | if (s.fTextures[i]) { |
tomhudson@google.com | 02b1ea2 | 2012-04-30 20:19:07 +0000 | [diff] [blame] | 837 | this->fSamplerStates[i] = s.fSamplerStates[i]; |
bsalomon@google.com | 3d0835b | 2011-12-08 16:12:03 +0000 | [diff] [blame] | 838 | } |
| 839 | } |
bsalomon@google.com | 9b1517e | 2012-03-05 17:58:34 +0000 | [diff] [blame] | 840 | if (kColorMatrix_StateBit & s.fFlagBits) { |
| 841 | memcpy(this->fColorMatrix, s.fColorMatrix, sizeof(fColorMatrix)); |
| 842 | } |
bsalomon@google.com | 3d0835b | 2011-12-08 16:12:03 +0000 | [diff] [blame] | 843 | |
| 844 | return *this; |
| 845 | } |
| 846 | |
| 847 | private: |
bsalomon@google.com | 2e3d144 | 2012-03-26 20:33:54 +0000 | [diff] [blame] | 848 | |
| 849 | const void* podStart() const { |
| 850 | return reinterpret_cast<const void*>(&fPodStartMarker); |
| 851 | } |
| 852 | void* podStart() { |
| 853 | return reinterpret_cast<void*>(&fPodStartMarker); |
| 854 | } |
| 855 | size_t memsetSize() const { |
| 856 | return reinterpret_cast<size_t>(&fMemsetEndMarker) - |
| 857 | reinterpret_cast<size_t>(&fPodStartMarker) + |
| 858 | sizeof(fMemsetEndMarker); |
| 859 | } |
| 860 | size_t podSize() const { |
| 861 | // Can't use offsetof() with non-POD types, so stuck with pointer math. |
| 862 | // TODO: ignores GrTesselatedPathRenderer data structures. We don't |
| 863 | // have a compile-time flag that lets us know if it's being used, and |
| 864 | // checking at runtime seems to cost 5% performance. |
| 865 | return reinterpret_cast<size_t>(&fPodEndMarker) - |
| 866 | reinterpret_cast<size_t>(&fPodStartMarker) + |
| 867 | sizeof(fPodEndMarker); |
| 868 | } |
| 869 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 870 | static const StageMask kIllegalStageMaskBits = ~((1 << kNumStages)-1); |
bsalomon@google.com | 52a5dcb | 2012-01-17 16:01:37 +0000 | [diff] [blame] | 871 | // @{ these fields can be initialized with memset to 0 |
bsalomon@google.com | 2e3d144 | 2012-03-26 20:33:54 +0000 | [diff] [blame] | 872 | union { |
| 873 | GrColor fBlendConstant; |
| 874 | GrColor fPodStartMarker; |
| 875 | }; |
bsalomon@google.com | 52a5dcb | 2012-01-17 16:01:37 +0000 | [diff] [blame] | 876 | GrTexture* fTextures[kNumStages]; |
| 877 | GrColor fColorFilterColor; |
| 878 | uint32_t fFlagBits; |
| 879 | DrawFace fDrawFace; |
| 880 | VertexEdgeType fVertexEdgeType; |
| 881 | GrStencilSettings fStencilSettings; |
bsalomon@google.com | 2e3d144 | 2012-03-26 20:33:54 +0000 | [diff] [blame] | 882 | union { |
| 883 | GrRenderTarget* fRenderTarget; |
| 884 | GrRenderTarget* fMemsetEndMarker; |
| 885 | }; |
bsalomon@google.com | 52a5dcb | 2012-01-17 16:01:37 +0000 | [diff] [blame] | 886 | // @} |
| 887 | |
bsalomon@google.com | 2e3d144 | 2012-03-26 20:33:54 +0000 | [diff] [blame] | 888 | // @{ Initialized to values other than zero, but memcmp'ed in operator== |
| 889 | // and memcpy'ed in operator=. |
bsalomon@google.com | 52a5dcb | 2012-01-17 16:01:37 +0000 | [diff] [blame] | 890 | GrColor fColor; |
bsalomon@google.com | 2401ae8 | 2012-01-17 21:03:05 +0000 | [diff] [blame] | 891 | GrColor fCoverage; |
bsalomon@google.com | 52a5dcb | 2012-01-17 16:01:37 +0000 | [diff] [blame] | 892 | int fFirstCoverageStage; |
| 893 | SkXfermode::Mode fColorFilterMode; |
| 894 | GrBlendCoeff fSrcBlend; |
bsalomon@google.com | 2e3d144 | 2012-03-26 20:33:54 +0000 | [diff] [blame] | 895 | union { |
| 896 | GrBlendCoeff fDstBlend; |
| 897 | GrBlendCoeff fPodEndMarker; |
| 898 | }; |
bsalomon@google.com | 52a5dcb | 2012-01-17 16:01:37 +0000 | [diff] [blame] | 899 | // @} |
| 900 | |
robertphillips@google.com | 28b4bce | 2012-05-04 16:34:52 +0000 | [diff] [blame] | 901 | uint32_t fBehaviorBits; |
bsalomon@google.com | 8fe84b5 | 2012-03-26 15:24:27 +0000 | [diff] [blame] | 902 | GrMatrix fViewMatrix; |
| 903 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 904 | // @{ Data for GrTesselatedPathRenderer |
| 905 | // TODO: currently ignored in copying & comparison for performance. |
| 906 | // Must be considered if GrTesselatedPathRenderer is being used. |
bsalomon@google.com | 52a5dcb | 2012-01-17 16:01:37 +0000 | [diff] [blame] | 907 | int fEdgeAANumEdges; |
| 908 | Edge fEdgeAAEdges[kMaxEdges]; |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 909 | // @} |
bsalomon@google.com | 52a5dcb | 2012-01-17 16:01:37 +0000 | [diff] [blame] | 910 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 911 | // This field must be last; it will not be copied or compared |
| 912 | // if the corresponding fTexture[] is NULL. |
bsalomon@google.com | 52a5dcb | 2012-01-17 16:01:37 +0000 | [diff] [blame] | 913 | GrSamplerState fSamplerStates[kNumStages]; |
bsalomon@google.com | 9b1517e | 2012-03-05 17:58:34 +0000 | [diff] [blame] | 914 | // only compared if the color matrix enable flag is set |
| 915 | float fColorMatrix[20]; // 5 x 4 matrix |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 916 | |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 917 | }; |
| 918 | |
| 919 | #endif |