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 | |
bsalomon@google.com | 2eaaefd | 2012-10-29 19:51:22 +0000 | [diff] [blame] | 11 | #include "GrBackendEffectFactory.h" |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 12 | #include "GrColor.h" |
bsalomon@google.com | 08283af | 2012-10-26 13:01:20 +0000 | [diff] [blame] | 13 | #include "GrEffectStage.h" |
bsalomon@google.com | 73818dc | 2013-03-28 13:23:29 +0000 | [diff] [blame] | 14 | #include "GrPaint.h" |
jvanverth@google.com | cc78238 | 2013-01-28 20:39:48 +0000 | [diff] [blame] | 15 | #include "GrRefCnt.h" |
robertphillips@google.com | 9ec0753 | 2012-06-22 12:01:30 +0000 | [diff] [blame] | 16 | #include "GrRenderTarget.h" |
jvanverth@google.com | cc78238 | 2013-01-28 20:39:48 +0000 | [diff] [blame] | 17 | #include "GrStencil.h" |
| 18 | #include "GrTemplates.h" |
| 19 | #include "GrTexture.h" |
bsalomon@google.com | 31ec798 | 2013-03-27 18:14:57 +0000 | [diff] [blame] | 20 | #include "GrTypesPriv.h" |
bsalomon@google.com | 68b58c9 | 2013-01-17 16:50:08 +0000 | [diff] [blame] | 21 | #include "effects/GrSimpleTextureEffect.h" |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 22 | |
jvanverth@google.com | cc78238 | 2013-01-28 20:39:48 +0000 | [diff] [blame] | 23 | #include "SkMatrix.h" |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 24 | #include "SkXfermode.h" |
| 25 | |
bsalomon@google.com | 2e3d144 | 2012-03-26 20:33:54 +0000 | [diff] [blame] | 26 | class GrDrawState : public GrRefCnt { |
bsalomon@google.com | 2e3d144 | 2012-03-26 20:33:54 +0000 | [diff] [blame] | 27 | public: |
reed@google.com | fa35e3d | 2012-06-26 20:16:17 +0000 | [diff] [blame] | 28 | SK_DECLARE_INST_COUNT(GrDrawState) |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 29 | |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 30 | /** |
bsalomon@google.com | 1322134 | 2012-10-26 13:41:59 +0000 | [diff] [blame] | 31 | * Total number of effect stages. Each stage can host a GrEffect. A stage is enabled if it has a |
| 32 | * GrEffect. The effect produces an output color in the fragment shader. It's inputs are the |
| 33 | * output from the previous enabled stage and a position. The position is either derived from |
| 34 | * the interpolated vertex positions or explicit per-vertex coords, depending upon the |
jvanverth@google.com | 9b855c7 | 2013-03-01 18:21:22 +0000 | [diff] [blame] | 35 | * GrAttribBindings used to draw. |
robertphillips@google.com | bf5cad4 | 2012-05-10 12:40:40 +0000 | [diff] [blame] | 36 | * |
bsalomon@google.com | 1322134 | 2012-10-26 13:41:59 +0000 | [diff] [blame] | 37 | * The stages are divided into two sets, color-computing and coverage-computing. The final color |
| 38 | * stage produces the final pixel color. The coverage-computing stages function exactly as the |
| 39 | * color-computing but the output of the final coverage stage is treated as a fractional pixel |
| 40 | * coverage rather than as input to the src/dst color blend step. |
| 41 | * |
| 42 | * The input color to the first enabled color-stage is either the constant color or interpolated |
jvanverth@google.com | 054ae99 | 2013-04-01 20:06:51 +0000 | [diff] [blame] | 43 | * per-vertex colors. The input to the first coverage stage is either a constant coverage |
| 44 | * (usually full-coverage) or interpolated per-vertex coverage. |
bsalomon@google.com | 1322134 | 2012-10-26 13:41:59 +0000 | [diff] [blame] | 45 | * |
bsalomon@google.com | cf939ae | 2012-12-13 19:59:23 +0000 | [diff] [blame] | 46 | * See the documentation of kCoverageDrawing_StateBit for information about disabling the |
| 47 | * the color / coverage distinction. |
| 48 | * |
bsalomon@google.com | 1322134 | 2012-10-26 13:41:59 +0000 | [diff] [blame] | 49 | * Stages 0 through GrPaint::kTotalStages-1 are reserved for stages copied from the client's |
bsalomon@google.com | 73818dc | 2013-03-28 13:23:29 +0000 | [diff] [blame] | 50 | * GrPaint. Stage GrPaint::kTotalStages is earmarked for use by GrTextContext, GrPathRenderer- |
| 51 | * derived classes, and the rect/oval helper classes. GrPaint::kTotalStages+1 is earmarked for |
| 52 | * clipping by GrClipMaskManager. TODO: replace fixed size array of stages with variable size |
| 53 | * arrays of color and coverage stages. |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 54 | */ |
| 55 | enum { |
bsalomon@google.com | 73818dc | 2013-03-28 13:23:29 +0000 | [diff] [blame] | 56 | kNumStages = GrPaint::kTotalStages + 2, |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 57 | }; |
| 58 | |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 59 | GrDrawState() { |
bsalomon@google.com | 52a5dcb | 2012-01-17 16:01:37 +0000 | [diff] [blame] | 60 | this->reset(); |
| 61 | } |
bsalomon@google.com | 46f7afb | 2012-01-18 19:51:55 +0000 | [diff] [blame] | 62 | |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 63 | GrDrawState(const GrDrawState& state) { |
bsalomon@google.com | 46f7afb | 2012-01-18 19:51:55 +0000 | [diff] [blame] | 64 | *this = state; |
| 65 | } |
| 66 | |
robertphillips@google.com | 9ec0753 | 2012-06-22 12:01:30 +0000 | [diff] [blame] | 67 | virtual ~GrDrawState() { |
tomhudson@google.com | 7d6afdd | 2012-06-22 20:10:50 +0000 | [diff] [blame] | 68 | this->disableStages(); |
robertphillips@google.com | 9ec0753 | 2012-06-22 12:01:30 +0000 | [diff] [blame] | 69 | } |
| 70 | |
bsalomon@google.com | 52a5dcb | 2012-01-17 16:01:37 +0000 | [diff] [blame] | 71 | /** |
tomhudson@google.com | 7d6afdd | 2012-06-22 20:10:50 +0000 | [diff] [blame] | 72 | * Resets to the default state. |
bsalomon@google.com | 08283af | 2012-10-26 13:01:20 +0000 | [diff] [blame] | 73 | * GrEffects will be removed from all stages. |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 74 | */ |
bsalomon@google.com | 52a5dcb | 2012-01-17 16:01:37 +0000 | [diff] [blame] | 75 | void reset() { |
robertphillips@google.com | 9ec0753 | 2012-06-22 12:01:30 +0000 | [diff] [blame] | 76 | |
tomhudson@google.com | 7d6afdd | 2012-06-22 20:10:50 +0000 | [diff] [blame] | 77 | this->disableStages(); |
robertphillips@google.com | 9ec0753 | 2012-06-22 12:01:30 +0000 | [diff] [blame] | 78 | |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 79 | fRenderTarget.reset(NULL); |
| 80 | |
jvanverth@google.com | 9b855c7 | 2013-03-01 18:21:22 +0000 | [diff] [blame] | 81 | this->setDefaultVertexAttribs(); |
| 82 | |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 83 | fCommon.fColor = 0xffffffff; |
| 84 | fCommon.fViewMatrix.reset(); |
| 85 | fCommon.fSrcBlend = kOne_GrBlendCoeff; |
| 86 | fCommon.fDstBlend = kZero_GrBlendCoeff; |
| 87 | fCommon.fBlendConstant = 0x0; |
| 88 | fCommon.fFlagBits = 0x0; |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 89 | fCommon.fStencilSettings.setDisabled(); |
| 90 | fCommon.fFirstCoverageStage = kNumStages; |
| 91 | fCommon.fCoverage = 0xffffffff; |
| 92 | fCommon.fColorFilterMode = SkXfermode::kDst_Mode; |
| 93 | fCommon.fColorFilterColor = 0x0; |
| 94 | fCommon.fDrawFace = kBoth_DrawFace; |
bsalomon@google.com | af84e74 | 2012-10-05 13:23:24 +0000 | [diff] [blame] | 95 | } |
| 96 | |
| 97 | /** |
commit-bot@chromium.org | bb6a317 | 2013-05-28 17:25:49 +0000 | [diff] [blame^] | 98 | * Initializes the GrDrawState based on a GrPaint, view matrix and render target. Note that |
| 99 | * GrDrawState encompasses more than GrPaint. Aspects of GrDrawState that have no GrPaint |
| 100 | * equivalents are set to default values. GrPaint has fewer stages than GrDrawState. The extra |
| 101 | * GrDrawState stages are disabled. |
bsalomon@google.com | af84e74 | 2012-10-05 13:23:24 +0000 | [diff] [blame] | 102 | */ |
commit-bot@chromium.org | bb6a317 | 2013-05-28 17:25:49 +0000 | [diff] [blame^] | 103 | void setFromPaint(const GrPaint& , const SkMatrix& viewMatrix, GrRenderTarget*); |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 104 | |
| 105 | /////////////////////////////////////////////////////////////////////////// |
jvanverth@google.com | 9b855c7 | 2013-03-01 18:21:22 +0000 | [diff] [blame] | 106 | /// @name Vertex Attributes |
jvanverth@google.com | cc78238 | 2013-01-28 20:39:48 +0000 | [diff] [blame] | 107 | //// |
| 108 | |
jvanverth@google.com | 9b855c7 | 2013-03-01 18:21:22 +0000 | [diff] [blame] | 109 | enum { |
jvanverth@google.com | 054ae99 | 2013-04-01 20:06:51 +0000 | [diff] [blame] | 110 | kMaxVertexAttribCnt = kLast_GrVertexAttribBinding + 4, |
jvanverth@google.com | b75b0a0 | 2013-02-05 20:33:30 +0000 | [diff] [blame] | 111 | }; |
| 112 | |
jvanverth@google.com | 9b855c7 | 2013-03-01 18:21:22 +0000 | [diff] [blame] | 113 | /** |
jvanverth@google.com | 054ae99 | 2013-04-01 20:06:51 +0000 | [diff] [blame] | 114 | * The format of vertices is represented as an array of GrVertexAttribs, with each representing |
| 115 | * the type of the attribute, its offset, and semantic binding (see GrVertexAttrib in |
| 116 | * GrTypesPriv.h). |
jvanverth@google.com | b8b705b | 2013-02-28 16:28:34 +0000 | [diff] [blame] | 117 | * |
jvanverth@google.com | 054ae99 | 2013-04-01 20:06:51 +0000 | [diff] [blame] | 118 | * The mapping of attributes with kEffect bindings to GrEffect inputs is specified when |
| 119 | * setEffect is called. |
jvanverth@google.com | b8b705b | 2013-02-28 16:28:34 +0000 | [diff] [blame] | 120 | */ |
jvanverth@google.com | b75b0a0 | 2013-02-05 20:33:30 +0000 | [diff] [blame] | 121 | |
jvanverth@google.com | 9b855c7 | 2013-03-01 18:21:22 +0000 | [diff] [blame] | 122 | /** |
robertphillips@google.com | 4290330 | 2013-04-20 12:26:07 +0000 | [diff] [blame] | 123 | * Sets vertex attributes for next draw. The object driving the templatization |
| 124 | * should be a global GrVertexAttrib array that is never changed. |
jvanverth@google.com | 9b855c7 | 2013-03-01 18:21:22 +0000 | [diff] [blame] | 125 | */ |
robertphillips@google.com | 4290330 | 2013-04-20 12:26:07 +0000 | [diff] [blame] | 126 | template <const GrVertexAttrib A[]> void setVertexAttribs(int count) { |
| 127 | this->setVertexAttribs(A, count); |
| 128 | } |
jvanverth@google.com | b8b705b | 2013-02-28 16:28:34 +0000 | [diff] [blame] | 129 | |
robertphillips@google.com | 4290330 | 2013-04-20 12:26:07 +0000 | [diff] [blame] | 130 | const GrVertexAttrib* getVertexAttribs() const { return fCommon.fVAPtr; } |
| 131 | int getVertexAttribCount() const { return fCommon.fVACount; } |
jvanverth@google.com | 9b855c7 | 2013-03-01 18:21:22 +0000 | [diff] [blame] | 132 | |
| 133 | size_t getVertexSize() const; |
| 134 | |
| 135 | /** |
jvanverth@google.com | 054ae99 | 2013-04-01 20:06:51 +0000 | [diff] [blame] | 136 | * Sets default vertex attributes for next draw. The default is a single attribute: |
| 137 | * {kVec2f_GrVertexAttribType, 0, kPosition_GrVertexAttribType} |
jvanverth@google.com | 9b855c7 | 2013-03-01 18:21:22 +0000 | [diff] [blame] | 138 | */ |
| 139 | void setDefaultVertexAttribs(); |
jvanverth@google.com | b75b0a0 | 2013-02-05 20:33:30 +0000 | [diff] [blame] | 140 | |
jvanverth@google.com | 054ae99 | 2013-04-01 20:06:51 +0000 | [diff] [blame] | 141 | /** |
| 142 | * Getters for index into getVertexAttribs() for particular bindings. -1 is returned if the |
| 143 | * binding does not appear in the current attribs. These bindings should appear only once in |
| 144 | * the attrib array. |
| 145 | */ |
| 146 | |
| 147 | int positionAttributeIndex() const { |
| 148 | return fCommon.fFixedFunctionVertexAttribIndices[kPosition_GrVertexAttribBinding]; |
| 149 | } |
| 150 | int localCoordAttributeIndex() const { |
| 151 | return fCommon.fFixedFunctionVertexAttribIndices[kLocalCoord_GrVertexAttribBinding]; |
| 152 | } |
| 153 | int colorVertexAttributeIndex() const { |
| 154 | return fCommon.fFixedFunctionVertexAttribIndices[kColor_GrVertexAttribBinding]; |
| 155 | } |
| 156 | int coverageVertexAttributeIndex() const { |
| 157 | return fCommon.fFixedFunctionVertexAttribIndices[kCoverage_GrVertexAttribBinding]; |
| 158 | } |
| 159 | |
| 160 | bool hasLocalCoordAttribute() const { |
| 161 | return -1 != fCommon.fFixedFunctionVertexAttribIndices[kLocalCoord_GrVertexAttribBinding]; |
| 162 | } |
| 163 | bool hasColorVertexAttribute() const { |
| 164 | return -1 != fCommon.fFixedFunctionVertexAttribIndices[kColor_GrVertexAttribBinding]; |
| 165 | } |
| 166 | bool hasCoverageVertexAttribute() const { |
| 167 | return -1 != fCommon.fFixedFunctionVertexAttribIndices[kCoverage_GrVertexAttribBinding]; |
| 168 | } |
| 169 | |
commit-bot@chromium.org | ff6ea26 | 2013-03-12 12:26:08 +0000 | [diff] [blame] | 170 | bool validateVertexAttribs() const; |
| 171 | |
jvanverth@google.com | cc78238 | 2013-01-28 20:39:48 +0000 | [diff] [blame] | 172 | /** |
bsalomon@google.com | 0406b9e | 2013-04-02 21:00:15 +0000 | [diff] [blame] | 173 | * Helper to save/restore vertex attribs |
| 174 | */ |
| 175 | class AutoVertexAttribRestore { |
| 176 | public: |
| 177 | AutoVertexAttribRestore(GrDrawState* drawState) { |
| 178 | GrAssert(NULL != drawState); |
| 179 | fDrawState = drawState; |
robertphillips@google.com | 4290330 | 2013-04-20 12:26:07 +0000 | [diff] [blame] | 180 | fVAPtr = drawState->fCommon.fVAPtr; |
| 181 | fVACount = drawState->fCommon.fVACount; |
bsalomon@google.com | 0406b9e | 2013-04-02 21:00:15 +0000 | [diff] [blame] | 182 | fDrawState->setDefaultVertexAttribs(); |
| 183 | } |
| 184 | |
| 185 | ~AutoVertexAttribRestore(){ |
robertphillips@google.com | 4290330 | 2013-04-20 12:26:07 +0000 | [diff] [blame] | 186 | fDrawState->fCommon.fVAPtr = fVAPtr; |
| 187 | fDrawState->fCommon.fVACount = fVACount; |
bsalomon@google.com | 0406b9e | 2013-04-02 21:00:15 +0000 | [diff] [blame] | 188 | } |
| 189 | |
| 190 | private: |
robertphillips@google.com | 4290330 | 2013-04-20 12:26:07 +0000 | [diff] [blame] | 191 | GrDrawState* fDrawState; |
| 192 | const GrVertexAttrib* fVAPtr; |
| 193 | int fVACount; |
bsalomon@google.com | 0406b9e | 2013-04-02 21:00:15 +0000 | [diff] [blame] | 194 | }; |
| 195 | |
| 196 | /** |
jvanverth@google.com | 054ae99 | 2013-04-01 20:06:51 +0000 | [diff] [blame] | 197 | * Accessing positions, local coords, or colors, of a vertex within an array is a hassle |
| 198 | * involving casts and simple math. These helpers exist to keep GrDrawTarget clients' code a bit |
| 199 | * nicer looking. |
jvanverth@google.com | cc78238 | 2013-01-28 20:39:48 +0000 | [diff] [blame] | 200 | */ |
| 201 | |
| 202 | /** |
| 203 | * Gets a pointer to a GrPoint of a vertex's position or texture |
| 204 | * coordinate. |
jvanverth@google.com | 9b855c7 | 2013-03-01 18:21:22 +0000 | [diff] [blame] | 205 | * @param vertices the vertex array |
jvanverth@google.com | cc78238 | 2013-01-28 20:39:48 +0000 | [diff] [blame] | 206 | * @param vertexIndex the index of the vertex in the array |
| 207 | * @param vertexSize the size of each vertex in the array |
| 208 | * @param offset the offset in bytes of the vertex component. |
| 209 | * Defaults to zero (corresponding to vertex position) |
| 210 | * @return pointer to the vertex component as a GrPoint |
| 211 | */ |
| 212 | static GrPoint* GetVertexPoint(void* vertices, |
| 213 | int vertexIndex, |
| 214 | int vertexSize, |
| 215 | int offset = 0) { |
| 216 | intptr_t start = GrTCast<intptr_t>(vertices); |
| 217 | return GrTCast<GrPoint*>(start + offset + |
| 218 | vertexIndex * vertexSize); |
| 219 | } |
| 220 | static const GrPoint* GetVertexPoint(const void* vertices, |
| 221 | int vertexIndex, |
| 222 | int vertexSize, |
| 223 | int offset = 0) { |
| 224 | intptr_t start = GrTCast<intptr_t>(vertices); |
| 225 | return GrTCast<const GrPoint*>(start + offset + |
| 226 | vertexIndex * vertexSize); |
| 227 | } |
| 228 | |
| 229 | /** |
| 230 | * Gets a pointer to a GrColor inside a vertex within a vertex array. |
| 231 | * @param vertices the vetex array |
| 232 | * @param vertexIndex the index of the vertex in the array |
| 233 | * @param vertexSize the size of each vertex in the array |
| 234 | * @param offset the offset in bytes of the vertex color |
| 235 | * @return pointer to the vertex component as a GrColor |
| 236 | */ |
| 237 | static GrColor* GetVertexColor(void* vertices, |
| 238 | int vertexIndex, |
| 239 | int vertexSize, |
| 240 | int offset) { |
| 241 | intptr_t start = GrTCast<intptr_t>(vertices); |
| 242 | return GrTCast<GrColor*>(start + offset + |
| 243 | vertexIndex * vertexSize); |
| 244 | } |
| 245 | static const GrColor* GetVertexColor(const void* vertices, |
| 246 | int vertexIndex, |
| 247 | int vertexSize, |
| 248 | int offset) { |
| 249 | const intptr_t start = GrTCast<intptr_t>(vertices); |
| 250 | return GrTCast<const GrColor*>(start + offset + |
| 251 | vertexIndex * vertexSize); |
| 252 | } |
| 253 | |
jvanverth@google.com | 9b855c7 | 2013-03-01 18:21:22 +0000 | [diff] [blame] | 254 | /// @} |
| 255 | |
jvanverth@google.com | 9b855c7 | 2013-03-01 18:21:22 +0000 | [diff] [blame] | 256 | /** |
jvanverth@google.com | 9b855c7 | 2013-03-01 18:21:22 +0000 | [diff] [blame] | 257 | * Determines whether src alpha is guaranteed to be one for all src pixels |
| 258 | */ |
jvanverth@google.com | 054ae99 | 2013-04-01 20:06:51 +0000 | [diff] [blame] | 259 | bool srcAlphaWillBeOne() const; |
jvanverth@google.com | 9b855c7 | 2013-03-01 18:21:22 +0000 | [diff] [blame] | 260 | |
| 261 | /** |
| 262 | * Determines whether the output coverage is guaranteed to be one for all pixels hit by a draw. |
| 263 | */ |
jvanverth@google.com | 054ae99 | 2013-04-01 20:06:51 +0000 | [diff] [blame] | 264 | bool hasSolidCoverage() const; |
jvanverth@google.com | cc78238 | 2013-01-28 20:39:48 +0000 | [diff] [blame] | 265 | |
| 266 | /// @} |
| 267 | |
| 268 | /////////////////////////////////////////////////////////////////////////// |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 269 | /// @name Color |
| 270 | //// |
| 271 | |
| 272 | /** |
| 273 | * Sets color for next draw to a premultiplied-alpha color. |
| 274 | * |
| 275 | * @param color the color to set. |
| 276 | */ |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 277 | void setColor(GrColor color) { fCommon.fColor = color; } |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 278 | |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 279 | GrColor getColor() const { return fCommon.fColor; } |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 280 | |
| 281 | /** |
| 282 | * Sets the color to be used for the next draw to be |
| 283 | * (r,g,b,a) = (alpha, alpha, alpha, alpha). |
| 284 | * |
| 285 | * @param alpha The alpha value to set as the color. |
| 286 | */ |
| 287 | void setAlpha(uint8_t a) { |
| 288 | this->setColor((a << 24) | (a << 16) | (a << 8) | a); |
| 289 | } |
| 290 | |
| 291 | /** |
| 292 | * Add a color filter that can be represented by a color and a mode. Applied |
bsalomon@google.com | c781888 | 2013-03-20 19:19:53 +0000 | [diff] [blame] | 293 | * after color-computing effect stages. |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 294 | */ |
| 295 | void setColorFilter(GrColor c, SkXfermode::Mode mode) { |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 296 | fCommon.fColorFilterColor = c; |
| 297 | fCommon.fColorFilterMode = mode; |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 298 | } |
| 299 | |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 300 | GrColor getColorFilterColor() const { return fCommon.fColorFilterColor; } |
| 301 | SkXfermode::Mode getColorFilterMode() const { return fCommon.fColorFilterMode; } |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 302 | |
bsalomon@google.com | 5b3e890 | 2012-10-05 20:13:28 +0000 | [diff] [blame] | 303 | /** |
| 304 | * Constructor sets the color to be 'color' which is undone by the destructor. |
| 305 | */ |
| 306 | class AutoColorRestore : public ::GrNoncopyable { |
| 307 | public: |
sugoi@google.com | 66a58ac | 2013-03-05 20:40:52 +0000 | [diff] [blame] | 308 | AutoColorRestore() : fDrawState(NULL), fOldColor(0) {} |
bsalomon@google.com | d62e88e | 2013-02-01 14:19:27 +0000 | [diff] [blame] | 309 | |
bsalomon@google.com | 5b3e890 | 2012-10-05 20:13:28 +0000 | [diff] [blame] | 310 | AutoColorRestore(GrDrawState* drawState, GrColor color) { |
bsalomon@google.com | d62e88e | 2013-02-01 14:19:27 +0000 | [diff] [blame] | 311 | fDrawState = NULL; |
| 312 | this->set(drawState, color); |
| 313 | } |
| 314 | |
| 315 | void reset() { |
| 316 | if (NULL != fDrawState) { |
| 317 | fDrawState->setColor(fOldColor); |
| 318 | fDrawState = NULL; |
| 319 | } |
| 320 | } |
| 321 | |
| 322 | void set(GrDrawState* drawState, GrColor color) { |
| 323 | this->reset(); |
bsalomon@google.com | 5b3e890 | 2012-10-05 20:13:28 +0000 | [diff] [blame] | 324 | fDrawState = drawState; |
| 325 | fOldColor = fDrawState->getColor(); |
| 326 | fDrawState->setColor(color); |
| 327 | } |
bsalomon@google.com | d62e88e | 2013-02-01 14:19:27 +0000 | [diff] [blame] | 328 | |
| 329 | ~AutoColorRestore() { this->reset(); } |
bsalomon@google.com | 5b3e890 | 2012-10-05 20:13:28 +0000 | [diff] [blame] | 330 | private: |
| 331 | GrDrawState* fDrawState; |
| 332 | GrColor fOldColor; |
| 333 | }; |
| 334 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 335 | /// @} |
| 336 | |
| 337 | /////////////////////////////////////////////////////////////////////////// |
bsalomon@google.com | 2401ae8 | 2012-01-17 21:03:05 +0000 | [diff] [blame] | 338 | /// @name Coverage |
| 339 | //// |
| 340 | |
| 341 | /** |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 342 | * Sets a constant fractional coverage to be applied to the draw. The |
bsalomon@google.com | 2401ae8 | 2012-01-17 21:03:05 +0000 | [diff] [blame] | 343 | * initial value (after construction or reset()) is 0xff. The constant |
| 344 | * coverage is ignored when per-vertex coverage is provided. |
| 345 | */ |
| 346 | void setCoverage(uint8_t coverage) { |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 347 | fCommon.fCoverage = GrColorPackRGBA(coverage, coverage, coverage, coverage); |
bsalomon@google.com | 2401ae8 | 2012-01-17 21:03:05 +0000 | [diff] [blame] | 348 | } |
| 349 | |
| 350 | /** |
| 351 | * Version of above that specifies 4 channel per-vertex color. The value |
| 352 | * should be premultiplied. |
| 353 | */ |
| 354 | void setCoverage4(GrColor coverage) { |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 355 | fCommon.fCoverage = coverage; |
bsalomon@google.com | 2401ae8 | 2012-01-17 21:03:05 +0000 | [diff] [blame] | 356 | } |
| 357 | |
| 358 | GrColor getCoverage() const { |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 359 | return fCommon.fCoverage; |
bsalomon@google.com | 2401ae8 | 2012-01-17 21:03:05 +0000 | [diff] [blame] | 360 | } |
| 361 | |
| 362 | /// @} |
| 363 | |
| 364 | /////////////////////////////////////////////////////////////////////////// |
bsalomon@google.com | adc6536 | 2013-01-28 14:26:09 +0000 | [diff] [blame] | 365 | /// @name Effect Stages |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 366 | //// |
| 367 | |
jvanverth@google.com | 65eb4d5 | 2013-03-19 18:51:02 +0000 | [diff] [blame] | 368 | const GrEffectRef* setEffect(int stageIdx, const GrEffectRef* effect) { |
| 369 | fStages[stageIdx].setEffect(effect); |
| 370 | return effect; |
| 371 | } |
skia.committer@gmail.com | 01c34ee | 2013-03-20 07:01:02 +0000 | [diff] [blame] | 372 | |
skia.committer@gmail.com | 91274b9 | 2013-03-13 07:01:04 +0000 | [diff] [blame] | 373 | const GrEffectRef* setEffect(int stageIdx, const GrEffectRef* effect, |
jvanverth@google.com | 65eb4d5 | 2013-03-19 18:51:02 +0000 | [diff] [blame] | 374 | int attr0, int attr1 = -1) { |
| 375 | fStages[stageIdx].setEffect(effect, attr0, attr1); |
bsalomon@google.com | adc6536 | 2013-01-28 14:26:09 +0000 | [diff] [blame] | 376 | return effect; |
| 377 | } |
| 378 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 379 | /** |
bsalomon@google.com | c781888 | 2013-03-20 19:19:53 +0000 | [diff] [blame] | 380 | * Creates a GrSimpleTextureEffect that uses local coords as texture coordinates. |
tomhudson@google.com | 1e8f016 | 2012-07-20 16:25:18 +0000 | [diff] [blame] | 381 | */ |
bsalomon@google.com | b9086a0 | 2012-11-01 18:02:54 +0000 | [diff] [blame] | 382 | void createTextureEffect(int stageIdx, GrTexture* texture, const SkMatrix& matrix) { |
bsalomon@google.com | 08283af | 2012-10-26 13:01:20 +0000 | [diff] [blame] | 383 | GrAssert(!this->getStage(stageIdx).getEffect()); |
bsalomon@google.com | 68b58c9 | 2013-01-17 16:50:08 +0000 | [diff] [blame] | 384 | GrEffectRef* effect = GrSimpleTextureEffect::Create(texture, matrix); |
bsalomon@google.com | adc6536 | 2013-01-28 14:26:09 +0000 | [diff] [blame] | 385 | this->setEffect(stageIdx, effect)->unref(); |
bsalomon@google.com | dfdb7e5 | 2012-10-16 15:19:45 +0000 | [diff] [blame] | 386 | } |
bsalomon@google.com | 08283af | 2012-10-26 13:01:20 +0000 | [diff] [blame] | 387 | void createTextureEffect(int stageIdx, |
| 388 | GrTexture* texture, |
bsalomon@google.com | b9086a0 | 2012-11-01 18:02:54 +0000 | [diff] [blame] | 389 | const SkMatrix& matrix, |
bsalomon@google.com | dfdb7e5 | 2012-10-16 15:19:45 +0000 | [diff] [blame] | 390 | const GrTextureParams& params) { |
bsalomon@google.com | 08283af | 2012-10-26 13:01:20 +0000 | [diff] [blame] | 391 | GrAssert(!this->getStage(stageIdx).getEffect()); |
bsalomon@google.com | 68b58c9 | 2013-01-17 16:50:08 +0000 | [diff] [blame] | 392 | GrEffectRef* effect = GrSimpleTextureEffect::Create(texture, matrix, params); |
bsalomon@google.com | adc6536 | 2013-01-28 14:26:09 +0000 | [diff] [blame] | 393 | this->setEffect(stageIdx, effect)->unref(); |
bsalomon@google.com | 1ce49fc | 2012-09-18 14:14:49 +0000 | [diff] [blame] | 394 | } |
| 395 | |
tomhudson@google.com | 7d6afdd | 2012-06-22 20:10:50 +0000 | [diff] [blame] | 396 | bool stagesDisabled() { |
| 397 | for (int i = 0; i < kNumStages; ++i) { |
bsalomon@google.com | 08283af | 2012-10-26 13:01:20 +0000 | [diff] [blame] | 398 | if (NULL != fStages[i].getEffect()) { |
tomhudson@google.com | 7d6afdd | 2012-06-22 20:10:50 +0000 | [diff] [blame] | 399 | return false; |
| 400 | } |
tomhudson@google.com | 7d6afdd | 2012-06-22 20:10:50 +0000 | [diff] [blame] | 401 | } |
tomhudson@google.com | 3eee8fb | 2012-06-25 12:30:34 +0000 | [diff] [blame] | 402 | return true; |
tomhudson@google.com | 7d6afdd | 2012-06-22 20:10:50 +0000 | [diff] [blame] | 403 | } |
tomhudson@google.com | 676e660 | 2012-07-10 17:21:48 +0000 | [diff] [blame] | 404 | |
skia.committer@gmail.com | 91274b9 | 2013-03-13 07:01:04 +0000 | [diff] [blame] | 405 | void disableStage(int stageIdx) { |
jvanverth@google.com | 65eb4d5 | 2013-03-19 18:51:02 +0000 | [diff] [blame] | 406 | this->setEffect(stageIdx, NULL); |
commit-bot@chromium.org | ff6ea26 | 2013-03-12 12:26:08 +0000 | [diff] [blame] | 407 | } |
tomhudson@google.com | 676e660 | 2012-07-10 17:21:48 +0000 | [diff] [blame] | 408 | |
robertphillips@google.com | 972265d | 2012-06-13 18:49:30 +0000 | [diff] [blame] | 409 | /** |
bsalomon@google.com | f271cc7 | 2012-10-24 19:35:13 +0000 | [diff] [blame] | 410 | * Release all the GrEffects referred to by this draw state. |
robertphillips@google.com | 972265d | 2012-06-13 18:49:30 +0000 | [diff] [blame] | 411 | */ |
tomhudson@google.com | 7d6afdd | 2012-06-22 20:10:50 +0000 | [diff] [blame] | 412 | void disableStages() { |
robertphillips@google.com | 972265d | 2012-06-13 18:49:30 +0000 | [diff] [blame] | 413 | for (int i = 0; i < kNumStages; ++i) { |
tomhudson@google.com | 676e660 | 2012-07-10 17:21:48 +0000 | [diff] [blame] | 414 | this->disableStage(i); |
robertphillips@google.com | 972265d | 2012-06-13 18:49:30 +0000 | [diff] [blame] | 415 | } |
| 416 | } |
| 417 | |
tomhudson@google.com | 7d6afdd | 2012-06-22 20:10:50 +0000 | [diff] [blame] | 418 | class AutoStageDisable : public ::GrNoncopyable { |
robertphillips@google.com | 972265d | 2012-06-13 18:49:30 +0000 | [diff] [blame] | 419 | public: |
tomhudson@google.com | 7d6afdd | 2012-06-22 20:10:50 +0000 | [diff] [blame] | 420 | AutoStageDisable(GrDrawState* ds) : fDrawState(ds) {} |
| 421 | ~AutoStageDisable() { |
robertphillips@google.com | 972265d | 2012-06-13 18:49:30 +0000 | [diff] [blame] | 422 | if (NULL != fDrawState) { |
tomhudson@google.com | 7d6afdd | 2012-06-22 20:10:50 +0000 | [diff] [blame] | 423 | fDrawState->disableStages(); |
robertphillips@google.com | 972265d | 2012-06-13 18:49:30 +0000 | [diff] [blame] | 424 | } |
| 425 | } |
| 426 | private: |
| 427 | GrDrawState* fDrawState; |
| 428 | }; |
| 429 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 430 | /** |
bsalomon@google.com | 08283af | 2012-10-26 13:01:20 +0000 | [diff] [blame] | 431 | * Returns the current stage by index. |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 432 | */ |
bsalomon@google.com | 08283af | 2012-10-26 13:01:20 +0000 | [diff] [blame] | 433 | const GrEffectStage& getStage(int stageIdx) const { |
| 434 | GrAssert((unsigned)stageIdx < kNumStages); |
| 435 | return fStages[stageIdx]; |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 436 | } |
| 437 | |
| 438 | /** |
bsalomon@google.com | c781888 | 2013-03-20 19:19:53 +0000 | [diff] [blame] | 439 | * Called when the source coord system is changing. This ensures that effects will see the |
| 440 | * correct local coordinates. oldToNew gives the transformation from the old coord system in |
| 441 | * which the geometry was specified to the new coordinate system from which it will be rendered. |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 442 | */ |
bsalomon@google.com | c781888 | 2013-03-20 19:19:53 +0000 | [diff] [blame] | 443 | void localCoordChange(const SkMatrix& oldToNew) { |
reed@google.com | 67e7cde | 2013-03-20 17:47:16 +0000 | [diff] [blame] | 444 | for (int i = 0; i < kNumStages; ++i) { |
| 445 | if (this->isStageEnabled(i)) { |
bsalomon@google.com | c781888 | 2013-03-20 19:19:53 +0000 | [diff] [blame] | 446 | fStages[i].localCoordChange(oldToNew); |
reed@google.com | 67e7cde | 2013-03-20 17:47:16 +0000 | [diff] [blame] | 447 | } |
| 448 | } |
reed@google.com | 67e7cde | 2013-03-20 17:47:16 +0000 | [diff] [blame] | 449 | } |
skia.committer@gmail.com | 05a2ee0 | 2013-04-02 07:01:34 +0000 | [diff] [blame] | 450 | |
commit-bot@chromium.org | bb5c465 | 2013-04-01 12:49:31 +0000 | [diff] [blame] | 451 | /** |
| 452 | * Checks whether any of the effects will read the dst pixel color. |
| 453 | */ |
bsalomon@google.com | d09ab84 | 2013-05-15 17:30:26 +0000 | [diff] [blame] | 454 | bool willEffectReadDstColor() const; |
reed@google.com | 67e7cde | 2013-03-20 17:47:16 +0000 | [diff] [blame] | 455 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 456 | /// @} |
| 457 | |
| 458 | /////////////////////////////////////////////////////////////////////////// |
| 459 | /// @name Coverage / Color Stages |
| 460 | //// |
| 461 | |
| 462 | /** |
| 463 | * A common pattern is to compute a color with the initial stages and then |
| 464 | * modulate that color by a coverage value in later stage(s) (AA, mask- |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 465 | * filters, glyph mask, etc). Color-filters, xfermodes, etc should be |
| 466 | * computed based on the pre-coverage-modulated color. The division of |
| 467 | * stages between color-computing and coverage-computing is specified by |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 468 | * this method. Initially this is kNumStages (all stages |
| 469 | * are color-computing). |
| 470 | */ |
| 471 | void setFirstCoverageStage(int firstCoverageStage) { |
| 472 | GrAssert((unsigned)firstCoverageStage <= kNumStages); |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 473 | fCommon.fFirstCoverageStage = firstCoverageStage; |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 474 | } |
| 475 | |
| 476 | /** |
| 477 | * Gets the index of the first coverage-computing stage. |
| 478 | */ |
| 479 | int getFirstCoverageStage() const { |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 480 | return fCommon.fFirstCoverageStage; |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 481 | } |
| 482 | |
| 483 | ///@} |
| 484 | |
| 485 | /////////////////////////////////////////////////////////////////////////// |
| 486 | /// @name Blending |
| 487 | //// |
| 488 | |
| 489 | /** |
bsalomon@google.com | 1e269b5 | 2012-10-15 14:25:31 +0000 | [diff] [blame] | 490 | * Sets the blending function coefficients. |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 491 | * |
| 492 | * The blend function will be: |
| 493 | * D' = sat(S*srcCoef + D*dstCoef) |
| 494 | * |
| 495 | * where D is the existing destination color, S is the incoming source |
| 496 | * color, and D' is the new destination color that will be written. sat() |
| 497 | * is the saturation function. |
| 498 | * |
bsalomon@google.com | 1e269b5 | 2012-10-15 14:25:31 +0000 | [diff] [blame] | 499 | * @param srcCoef coefficient applied to the src color. |
| 500 | * @param dstCoef coefficient applied to the dst color. |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 501 | */ |
| 502 | void setBlendFunc(GrBlendCoeff srcCoeff, GrBlendCoeff dstCoeff) { |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 503 | fCommon.fSrcBlend = srcCoeff; |
| 504 | fCommon.fDstBlend = dstCoeff; |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 505 | #if GR_DEBUG |
| 506 | switch (dstCoeff) { |
bsalomon@google.com | 4705954 | 2012-06-06 20:51:20 +0000 | [diff] [blame] | 507 | case kDC_GrBlendCoeff: |
| 508 | case kIDC_GrBlendCoeff: |
| 509 | case kDA_GrBlendCoeff: |
| 510 | case kIDA_GrBlendCoeff: |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 511 | GrPrintf("Unexpected dst blend coeff. Won't work correctly with" |
| 512 | "coverage stages.\n"); |
| 513 | break; |
| 514 | default: |
| 515 | break; |
| 516 | } |
| 517 | switch (srcCoeff) { |
bsalomon@google.com | 4705954 | 2012-06-06 20:51:20 +0000 | [diff] [blame] | 518 | case kSC_GrBlendCoeff: |
| 519 | case kISC_GrBlendCoeff: |
| 520 | case kSA_GrBlendCoeff: |
| 521 | case kISA_GrBlendCoeff: |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 522 | GrPrintf("Unexpected src blend coeff. Won't work correctly with" |
| 523 | "coverage stages.\n"); |
| 524 | break; |
| 525 | default: |
| 526 | break; |
| 527 | } |
| 528 | #endif |
| 529 | } |
| 530 | |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 531 | GrBlendCoeff getSrcBlendCoeff() const { return fCommon.fSrcBlend; } |
| 532 | GrBlendCoeff getDstBlendCoeff() const { return fCommon.fDstBlend; } |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 533 | |
| 534 | void getDstBlendCoeff(GrBlendCoeff* srcBlendCoeff, |
| 535 | GrBlendCoeff* dstBlendCoeff) const { |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 536 | *srcBlendCoeff = fCommon.fSrcBlend; |
| 537 | *dstBlendCoeff = fCommon.fDstBlend; |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 538 | } |
| 539 | |
| 540 | /** |
| 541 | * Sets the blending function constant referenced by the following blending |
bsalomon@google.com | 1e269b5 | 2012-10-15 14:25:31 +0000 | [diff] [blame] | 542 | * coefficients: |
bsalomon@google.com | 4705954 | 2012-06-06 20:51:20 +0000 | [diff] [blame] | 543 | * kConstC_GrBlendCoeff |
| 544 | * kIConstC_GrBlendCoeff |
| 545 | * kConstA_GrBlendCoeff |
| 546 | * kIConstA_GrBlendCoeff |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 547 | * |
| 548 | * @param constant the constant to set |
| 549 | */ |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 550 | void setBlendConstant(GrColor constant) { fCommon.fBlendConstant = constant; } |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 551 | |
| 552 | /** |
| 553 | * Retrieves the last value set by setBlendConstant() |
| 554 | * @return the blending constant value |
| 555 | */ |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 556 | GrColor getBlendConstant() const { return fCommon.fBlendConstant; } |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 557 | |
bsalomon@google.com | 2b44673 | 2013-02-12 16:47:41 +0000 | [diff] [blame] | 558 | /** |
| 559 | * Determines whether multiplying the computed per-pixel color by the pixel's fractional |
| 560 | * coverage before the blend will give the correct final destination color. In general it |
| 561 | * will not as coverage is applied after blending. |
| 562 | */ |
| 563 | bool canTweakAlphaForCoverage() const; |
| 564 | |
| 565 | /** |
| 566 | * Optimizations for blending / coverage to that can be applied based on the current state. |
| 567 | */ |
| 568 | enum BlendOptFlags { |
| 569 | /** |
| 570 | * No optimization |
| 571 | */ |
| 572 | kNone_BlendOpt = 0, |
| 573 | /** |
| 574 | * Don't draw at all |
| 575 | */ |
| 576 | kSkipDraw_BlendOptFlag = 0x1, |
| 577 | /** |
| 578 | * Emit the src color, disable HW blending (replace dst with src) |
| 579 | */ |
| 580 | kDisableBlend_BlendOptFlag = 0x2, |
| 581 | /** |
| 582 | * The coverage value does not have to be computed separately from alpha, the the output |
| 583 | * color can be the modulation of the two. |
| 584 | */ |
| 585 | kCoverageAsAlpha_BlendOptFlag = 0x4, |
| 586 | /** |
| 587 | * Instead of emitting a src color, emit coverage in the alpha channel and r,g,b are |
| 588 | * "don't cares". |
| 589 | */ |
| 590 | kEmitCoverage_BlendOptFlag = 0x8, |
| 591 | /** |
| 592 | * Emit transparent black instead of the src color, no need to compute coverage. |
| 593 | */ |
| 594 | kEmitTransBlack_BlendOptFlag = 0x10, |
| 595 | }; |
| 596 | GR_DECL_BITFIELD_OPS_FRIENDS(BlendOptFlags); |
| 597 | |
| 598 | /** |
| 599 | * Determines what optimizations can be applied based on the blend. The coefficients may have |
| 600 | * to be tweaked in order for the optimization to work. srcCoeff and dstCoeff are optional |
| 601 | * params that receive the tweaked coefficients. Normally the function looks at the current |
| 602 | * state to see if coverage is enabled. By setting forceCoverage the caller can speculatively |
| 603 | * determine the blend optimizations that would be used if there was partial pixel coverage. |
| 604 | * |
| 605 | * Subclasses of GrDrawTarget that actually draw (as opposed to those that just buffer for |
| 606 | * playback) must call this function and respect the flags that replace the output color. |
| 607 | */ |
| 608 | BlendOptFlags getBlendOpts(bool forceCoverage = false, |
| 609 | GrBlendCoeff* srcCoeff = NULL, |
| 610 | GrBlendCoeff* dstCoeff = NULL) const; |
| 611 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 612 | /// @} |
| 613 | |
| 614 | /////////////////////////////////////////////////////////////////////////// |
| 615 | /// @name View Matrix |
| 616 | //// |
| 617 | |
| 618 | /** |
robertphillips@google.com | a72eef3 | 2012-05-01 17:22:59 +0000 | [diff] [blame] | 619 | * Sets the matrix applied to vertex positions. |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 620 | * |
| 621 | * In the post-view-matrix space the rectangle [0,w]x[0,h] |
| 622 | * fully covers the render target. (w and h are the width and height of the |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 623 | * the render-target.) |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 624 | */ |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 625 | void setViewMatrix(const SkMatrix& m) { fCommon.fViewMatrix = m; } |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 626 | |
| 627 | /** |
| 628 | * Gets a writable pointer to the view matrix. |
| 629 | */ |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 630 | SkMatrix* viewMatrix() { return &fCommon.fViewMatrix; } |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 631 | |
| 632 | /** |
| 633 | * Multiplies the current view matrix by a matrix |
| 634 | * |
| 635 | * After this call V' = V*m where V is the old view matrix, |
| 636 | * m is the parameter to this function, and V' is the new view matrix. |
| 637 | * (We consider positions to be column vectors so position vector p is |
| 638 | * transformed by matrix X as p' = X*p.) |
| 639 | * |
| 640 | * @param m the matrix used to modify the view matrix. |
| 641 | */ |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 642 | void preConcatViewMatrix(const SkMatrix& m) { fCommon.fViewMatrix.preConcat(m); } |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 643 | |
| 644 | /** |
| 645 | * Multiplies the current view matrix by a matrix |
| 646 | * |
| 647 | * After this call V' = m*V where V is the old view matrix, |
| 648 | * m is the parameter to this function, and V' is the new view matrix. |
| 649 | * (We consider positions to be column vectors so position vector p is |
| 650 | * transformed by matrix X as p' = X*p.) |
| 651 | * |
| 652 | * @param m the matrix used to modify the view matrix. |
| 653 | */ |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 654 | void postConcatViewMatrix(const SkMatrix& m) { fCommon.fViewMatrix.postConcat(m); } |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 655 | |
| 656 | /** |
| 657 | * Retrieves the current view matrix |
| 658 | * @return the current view matrix. |
| 659 | */ |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 660 | const SkMatrix& getViewMatrix() const { return fCommon.fViewMatrix; } |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 661 | |
| 662 | /** |
| 663 | * Retrieves the inverse of the current view matrix. |
| 664 | * |
| 665 | * If the current view matrix is invertible, return true, and if matrix |
| 666 | * is non-null, copy the inverse into it. If the current view matrix is |
| 667 | * non-invertible, return false and ignore the matrix parameter. |
| 668 | * |
| 669 | * @param matrix if not null, will receive a copy of the current inverse. |
| 670 | */ |
bsalomon@google.com | b9086a0 | 2012-11-01 18:02:54 +0000 | [diff] [blame] | 671 | bool getViewInverse(SkMatrix* matrix) const { |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 672 | // TODO: determine whether we really need to leave matrix unmodified |
| 673 | // at call sites when inversion fails. |
bsalomon@google.com | b9086a0 | 2012-11-01 18:02:54 +0000 | [diff] [blame] | 674 | SkMatrix inverse; |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 675 | if (fCommon.fViewMatrix.invert(&inverse)) { |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 676 | if (matrix) { |
| 677 | *matrix = inverse; |
| 678 | } |
| 679 | return true; |
| 680 | } |
| 681 | return false; |
| 682 | } |
| 683 | |
bsalomon@google.com | 5b3e890 | 2012-10-05 20:13:28 +0000 | [diff] [blame] | 684 | //////////////////////////////////////////////////////////////////////////// |
| 685 | |
| 686 | /** |
bsalomon@google.com | 2fdcdeb | 2012-10-08 17:15:55 +0000 | [diff] [blame] | 687 | * Preconcats the current view matrix and restores the previous view matrix in the destructor. |
bsalomon@google.com | c196b52 | 2012-10-25 21:52:43 +0000 | [diff] [blame] | 688 | * Effect matrices are automatically adjusted to compensate. |
bsalomon@google.com | 5b3e890 | 2012-10-05 20:13:28 +0000 | [diff] [blame] | 689 | */ |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 690 | class AutoViewMatrixRestore : public ::GrNoncopyable { |
| 691 | public: |
| 692 | AutoViewMatrixRestore() : fDrawState(NULL) {} |
bsalomon@google.com | 2fdcdeb | 2012-10-08 17:15:55 +0000 | [diff] [blame] | 693 | |
bsalomon@google.com | c781888 | 2013-03-20 19:19:53 +0000 | [diff] [blame] | 694 | AutoViewMatrixRestore(GrDrawState* ds, const SkMatrix& preconcatMatrix) { |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 695 | fDrawState = NULL; |
bsalomon@google.com | c781888 | 2013-03-20 19:19:53 +0000 | [diff] [blame] | 696 | this->set(ds, preconcatMatrix); |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 697 | } |
bsalomon@google.com | 2fdcdeb | 2012-10-08 17:15:55 +0000 | [diff] [blame] | 698 | |
| 699 | ~AutoViewMatrixRestore() { this->restore(); } |
| 700 | |
bsalomon@google.com | a834746 | 2012-10-08 18:59:39 +0000 | [diff] [blame] | 701 | /** |
| 702 | * Can be called prior to destructor to restore the original matrix. |
| 703 | */ |
bsalomon@google.com | 2fdcdeb | 2012-10-08 17:15:55 +0000 | [diff] [blame] | 704 | void restore(); |
skia.committer@gmail.com | f467ce7 | 2012-10-09 02:01:37 +0000 | [diff] [blame] | 705 | |
bsalomon@google.com | c781888 | 2013-03-20 19:19:53 +0000 | [diff] [blame] | 706 | void set(GrDrawState* drawState, const SkMatrix& preconcatMatrix); |
bsalomon@google.com | 2fdcdeb | 2012-10-08 17:15:55 +0000 | [diff] [blame] | 707 | |
bsalomon@google.com | ded4f4b | 2012-06-28 18:48:06 +0000 | [diff] [blame] | 708 | bool isSet() const { return NULL != fDrawState; } |
bsalomon@google.com | 2fdcdeb | 2012-10-08 17:15:55 +0000 | [diff] [blame] | 709 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 710 | private: |
bsalomon@google.com | 288d954 | 2012-10-17 12:53:54 +0000 | [diff] [blame] | 711 | GrDrawState* fDrawState; |
bsalomon@google.com | b9086a0 | 2012-11-01 18:02:54 +0000 | [diff] [blame] | 712 | SkMatrix fViewMatrix; |
bsalomon@google.com | 08283af | 2012-10-26 13:01:20 +0000 | [diff] [blame] | 713 | GrEffectStage::SavedCoordChange fSavedCoordChanges[GrDrawState::kNumStages]; |
bsalomon@google.com | 288d954 | 2012-10-17 12:53:54 +0000 | [diff] [blame] | 714 | uint32_t fRestoreMask; |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 715 | }; |
| 716 | |
bsalomon@google.com | 5b3e890 | 2012-10-05 20:13:28 +0000 | [diff] [blame] | 717 | //////////////////////////////////////////////////////////////////////////// |
| 718 | |
| 719 | /** |
bsalomon@google.com | 2fdcdeb | 2012-10-08 17:15:55 +0000 | [diff] [blame] | 720 | * This sets the view matrix to identity and adjusts stage matrices to compensate. The |
| 721 | * destructor undoes the changes, restoring the view matrix that was set before the |
| 722 | * constructor. It is similar to passing the inverse of the current view matrix to |
| 723 | * AutoViewMatrixRestore, but lazily computes the inverse only if necessary. |
bsalomon@google.com | 5b3e890 | 2012-10-05 20:13:28 +0000 | [diff] [blame] | 724 | */ |
| 725 | class AutoDeviceCoordDraw : ::GrNoncopyable { |
| 726 | public: |
bsalomon@google.com | 2fdcdeb | 2012-10-08 17:15:55 +0000 | [diff] [blame] | 727 | AutoDeviceCoordDraw() : fDrawState(NULL) {} |
bsalomon@google.com | 5b3e890 | 2012-10-05 20:13:28 +0000 | [diff] [blame] | 728 | /** |
bsalomon@google.com | 2fdcdeb | 2012-10-08 17:15:55 +0000 | [diff] [blame] | 729 | * If a stage's texture matrix is applied to explicit per-vertex coords, rather than to |
| 730 | * positions, then we don't want to modify its matrix. The explicitCoordStageMask is used |
| 731 | * to specify such stages. |
bsalomon@google.com | 5b3e890 | 2012-10-05 20:13:28 +0000 | [diff] [blame] | 732 | */ |
bsalomon@google.com | c781888 | 2013-03-20 19:19:53 +0000 | [diff] [blame] | 733 | AutoDeviceCoordDraw(GrDrawState* drawState) { |
bsalomon@google.com | 2fdcdeb | 2012-10-08 17:15:55 +0000 | [diff] [blame] | 734 | fDrawState = NULL; |
bsalomon@google.com | c781888 | 2013-03-20 19:19:53 +0000 | [diff] [blame] | 735 | this->set(drawState); |
bsalomon@google.com | 2fdcdeb | 2012-10-08 17:15:55 +0000 | [diff] [blame] | 736 | } |
| 737 | |
bsalomon@google.com | a834746 | 2012-10-08 18:59:39 +0000 | [diff] [blame] | 738 | ~AutoDeviceCoordDraw() { this->restore(); } |
| 739 | |
bsalomon@google.com | c781888 | 2013-03-20 19:19:53 +0000 | [diff] [blame] | 740 | bool set(GrDrawState* drawState); |
bsalomon@google.com | 2fdcdeb | 2012-10-08 17:15:55 +0000 | [diff] [blame] | 741 | |
bsalomon@google.com | a834746 | 2012-10-08 18:59:39 +0000 | [diff] [blame] | 742 | /** |
| 743 | * Returns true if this object was successfully initialized on to a GrDrawState. It may |
| 744 | * return false because a non-default constructor or set() were never called or because |
| 745 | * the view matrix was not invertible. |
| 746 | */ |
bsalomon@google.com | 5b3e890 | 2012-10-05 20:13:28 +0000 | [diff] [blame] | 747 | bool succeeded() const { return NULL != fDrawState; } |
bsalomon@google.com | 2fdcdeb | 2012-10-08 17:15:55 +0000 | [diff] [blame] | 748 | |
bsalomon@google.com | a834746 | 2012-10-08 18:59:39 +0000 | [diff] [blame] | 749 | /** |
| 750 | * Returns the matrix that was set previously set on the drawState. This is only valid |
| 751 | * if succeeded returns true. |
| 752 | */ |
bsalomon@google.com | b9086a0 | 2012-11-01 18:02:54 +0000 | [diff] [blame] | 753 | const SkMatrix& getOriginalMatrix() const { |
bsalomon@google.com | a834746 | 2012-10-08 18:59:39 +0000 | [diff] [blame] | 754 | GrAssert(this->succeeded()); |
| 755 | return fViewMatrix; |
| 756 | } |
bsalomon@google.com | 2fdcdeb | 2012-10-08 17:15:55 +0000 | [diff] [blame] | 757 | |
bsalomon@google.com | a834746 | 2012-10-08 18:59:39 +0000 | [diff] [blame] | 758 | /** |
| 759 | * Can be called prior to destructor to restore the original matrix. |
| 760 | */ |
| 761 | void restore(); |
bsalomon@google.com | 2fdcdeb | 2012-10-08 17:15:55 +0000 | [diff] [blame] | 762 | |
bsalomon@google.com | 5b3e890 | 2012-10-05 20:13:28 +0000 | [diff] [blame] | 763 | private: |
bsalomon@google.com | 288d954 | 2012-10-17 12:53:54 +0000 | [diff] [blame] | 764 | GrDrawState* fDrawState; |
bsalomon@google.com | b9086a0 | 2012-11-01 18:02:54 +0000 | [diff] [blame] | 765 | SkMatrix fViewMatrix; |
bsalomon@google.com | 08283af | 2012-10-26 13:01:20 +0000 | [diff] [blame] | 766 | GrEffectStage::SavedCoordChange fSavedCoordChanges[GrDrawState::kNumStages]; |
bsalomon@google.com | 288d954 | 2012-10-17 12:53:54 +0000 | [diff] [blame] | 767 | uint32_t fRestoreMask; |
bsalomon@google.com | 5b3e890 | 2012-10-05 20:13:28 +0000 | [diff] [blame] | 768 | }; |
| 769 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 770 | /// @} |
| 771 | |
| 772 | /////////////////////////////////////////////////////////////////////////// |
| 773 | /// @name Render Target |
| 774 | //// |
| 775 | |
| 776 | /** |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 777 | * Sets the render-target used at the next drawing call |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 778 | * |
| 779 | * @param target The render target to set. |
| 780 | */ |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 781 | void setRenderTarget(GrRenderTarget* target) { |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 782 | fRenderTarget.reset(SkSafeRef(target)); |
robertphillips@google.com | 9ec0753 | 2012-06-22 12:01:30 +0000 | [diff] [blame] | 783 | } |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 784 | |
| 785 | /** |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 786 | * Retrieves the currently set render-target. |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 787 | * |
| 788 | * @return The currently set render target. |
| 789 | */ |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 790 | const GrRenderTarget* getRenderTarget() const { return fRenderTarget.get(); } |
| 791 | GrRenderTarget* getRenderTarget() { return fRenderTarget.get(); } |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 792 | |
| 793 | class AutoRenderTargetRestore : public ::GrNoncopyable { |
| 794 | public: |
bsalomon@google.com | cadbcb8 | 2012-01-06 19:22:11 +0000 | [diff] [blame] | 795 | AutoRenderTargetRestore() : fDrawState(NULL), fSavedTarget(NULL) {} |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 796 | AutoRenderTargetRestore(GrDrawState* ds, GrRenderTarget* newTarget) { |
| 797 | fDrawState = NULL; |
robertphillips@google.com | 7460b37 | 2012-04-25 16:54:51 +0000 | [diff] [blame] | 798 | fSavedTarget = NULL; |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 799 | this->set(ds, newTarget); |
| 800 | } |
robertphillips@google.com | 9ec0753 | 2012-06-22 12:01:30 +0000 | [diff] [blame] | 801 | ~AutoRenderTargetRestore() { this->restore(); } |
| 802 | |
| 803 | void restore() { |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 804 | if (NULL != fDrawState) { |
| 805 | fDrawState->setRenderTarget(fSavedTarget); |
robertphillips@google.com | 9ec0753 | 2012-06-22 12:01:30 +0000 | [diff] [blame] | 806 | fDrawState = NULL; |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 807 | } |
robertphillips@google.com | 9ec0753 | 2012-06-22 12:01:30 +0000 | [diff] [blame] | 808 | GrSafeSetNull(fSavedTarget); |
| 809 | } |
| 810 | |
| 811 | void set(GrDrawState* ds, GrRenderTarget* newTarget) { |
| 812 | this->restore(); |
| 813 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 814 | if (NULL != ds) { |
robertphillips@google.com | 9ec0753 | 2012-06-22 12:01:30 +0000 | [diff] [blame] | 815 | GrAssert(NULL == fSavedTarget); |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 816 | fSavedTarget = ds->getRenderTarget(); |
robertphillips@google.com | 9ec0753 | 2012-06-22 12:01:30 +0000 | [diff] [blame] | 817 | SkSafeRef(fSavedTarget); |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 818 | ds->setRenderTarget(newTarget); |
robertphillips@google.com | 9ec0753 | 2012-06-22 12:01:30 +0000 | [diff] [blame] | 819 | fDrawState = ds; |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 820 | } |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 821 | } |
| 822 | private: |
| 823 | GrDrawState* fDrawState; |
| 824 | GrRenderTarget* fSavedTarget; |
| 825 | }; |
| 826 | |
| 827 | /// @} |
| 828 | |
| 829 | /////////////////////////////////////////////////////////////////////////// |
| 830 | /// @name Stencil |
| 831 | //// |
| 832 | |
| 833 | /** |
| 834 | * Sets the stencil settings to use for the next draw. |
| 835 | * Changing the clip has the side-effect of possibly zeroing |
| 836 | * out the client settable stencil bits. So multipass algorithms |
| 837 | * using stencil should not change the clip between passes. |
| 838 | * @param settings the stencil settings to use. |
| 839 | */ |
| 840 | void setStencil(const GrStencilSettings& settings) { |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 841 | fCommon.fStencilSettings = settings; |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 842 | } |
| 843 | |
| 844 | /** |
| 845 | * Shortcut to disable stencil testing and ops. |
| 846 | */ |
| 847 | void disableStencil() { |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 848 | fCommon.fStencilSettings.setDisabled(); |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 849 | } |
| 850 | |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 851 | const GrStencilSettings& getStencil() const { return fCommon.fStencilSettings; } |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 852 | |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 853 | GrStencilSettings* stencil() { return &fCommon.fStencilSettings; } |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 854 | |
| 855 | /// @} |
| 856 | |
| 857 | /////////////////////////////////////////////////////////////////////////// |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 858 | /// @name State Flags |
| 859 | //// |
tomhudson@google.com | 62b0968 | 2011-11-09 16:39:17 +0000 | [diff] [blame] | 860 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 861 | /** |
| 862 | * Flags that affect rendering. Controlled using enable/disableState(). All |
| 863 | * default to disabled. |
| 864 | */ |
| 865 | enum StateBits { |
| 866 | /** |
| 867 | * Perform dithering. TODO: Re-evaluate whether we need this bit |
| 868 | */ |
| 869 | kDither_StateBit = 0x01, |
| 870 | /** |
bsalomon@google.com | cf939ae | 2012-12-13 19:59:23 +0000 | [diff] [blame] | 871 | * Perform HW anti-aliasing. This means either HW FSAA, if supported by the render target, |
| 872 | * or smooth-line rendering if a line primitive is drawn and line smoothing is supported by |
| 873 | * the 3D API. |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 874 | */ |
| 875 | kHWAntialias_StateBit = 0x02, |
| 876 | /** |
| 877 | * Draws will respect the clip, otherwise the clip is ignored. |
| 878 | */ |
| 879 | kClip_StateBit = 0x04, |
| 880 | /** |
| 881 | * Disables writing to the color buffer. Useful when performing stencil |
| 882 | * operations. |
| 883 | */ |
| 884 | kNoColorWrites_StateBit = 0x08, |
bsalomon@google.com | 0342a85 | 2012-08-20 19:22:38 +0000 | [diff] [blame] | 885 | |
bsalomon@google.com | cf939ae | 2012-12-13 19:59:23 +0000 | [diff] [blame] | 886 | /** |
| 887 | * Usually coverage is applied after color blending. The color is blended using the coeffs |
| 888 | * specified by setBlendFunc(). The blended color is then combined with dst using coeffs |
| 889 | * of src_coverage, 1-src_coverage. Sometimes we are explicitly drawing a coverage mask. In |
| 890 | * this case there is no distinction between coverage and color and the caller needs direct |
| 891 | * control over the blend coeffs. When set, there will be a single blend step controlled by |
| 892 | * setBlendFunc() which will use coverage*color as the src color. |
| 893 | */ |
| 894 | kCoverageDrawing_StateBit = 0x10, |
| 895 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 896 | // Users of the class may add additional bits to the vector |
| 897 | kDummyStateBit, |
| 898 | kLastPublicStateBit = kDummyStateBit-1, |
| 899 | }; |
| 900 | |
| 901 | void resetStateFlags() { |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 902 | fCommon.fFlagBits = 0; |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 903 | } |
| 904 | |
| 905 | /** |
| 906 | * Enable render state settings. |
| 907 | * |
bsalomon@google.com | 1e269b5 | 2012-10-15 14:25:31 +0000 | [diff] [blame] | 908 | * @param stateBits bitfield of StateBits specifying the states to enable |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 909 | */ |
| 910 | void enableState(uint32_t stateBits) { |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 911 | fCommon.fFlagBits |= stateBits; |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 912 | } |
| 913 | |
| 914 | /** |
| 915 | * Disable render state settings. |
| 916 | * |
bsalomon@google.com | 1e269b5 | 2012-10-15 14:25:31 +0000 | [diff] [blame] | 917 | * @param stateBits bitfield of StateBits specifying the states to disable |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 918 | */ |
| 919 | void disableState(uint32_t stateBits) { |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 920 | fCommon.fFlagBits &= ~(stateBits); |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 921 | } |
| 922 | |
bsalomon@google.com | d5d69ff | 2012-10-04 19:42:00 +0000 | [diff] [blame] | 923 | /** |
| 924 | * Enable or disable stateBits based on a boolean. |
| 925 | * |
bsalomon@google.com | 1e269b5 | 2012-10-15 14:25:31 +0000 | [diff] [blame] | 926 | * @param stateBits bitfield of StateBits to enable or disable |
bsalomon@google.com | d5d69ff | 2012-10-04 19:42:00 +0000 | [diff] [blame] | 927 | * @param enable if true enable stateBits, otherwise disable |
| 928 | */ |
| 929 | void setState(uint32_t stateBits, bool enable) { |
| 930 | if (enable) { |
| 931 | this->enableState(stateBits); |
| 932 | } else { |
| 933 | this->disableState(stateBits); |
| 934 | } |
| 935 | } |
| 936 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 937 | bool isDitherState() const { |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 938 | return 0 != (fCommon.fFlagBits & kDither_StateBit); |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 939 | } |
| 940 | |
| 941 | bool isHWAntialiasState() const { |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 942 | return 0 != (fCommon.fFlagBits & kHWAntialias_StateBit); |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 943 | } |
| 944 | |
| 945 | bool isClipState() const { |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 946 | return 0 != (fCommon.fFlagBits & kClip_StateBit); |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 947 | } |
| 948 | |
| 949 | bool isColorWriteDisabled() const { |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 950 | return 0 != (fCommon.fFlagBits & kNoColorWrites_StateBit); |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 951 | } |
| 952 | |
bsalomon@google.com | cf939ae | 2012-12-13 19:59:23 +0000 | [diff] [blame] | 953 | bool isCoverageDrawing() const { |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 954 | return 0 != (fCommon.fFlagBits & kCoverageDrawing_StateBit); |
bsalomon@google.com | cf939ae | 2012-12-13 19:59:23 +0000 | [diff] [blame] | 955 | } |
| 956 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 957 | bool isStateFlagEnabled(uint32_t stateBit) const { |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 958 | return 0 != (stateBit & fCommon.fFlagBits); |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 959 | } |
| 960 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 961 | /// @} |
| 962 | |
| 963 | /////////////////////////////////////////////////////////////////////////// |
| 964 | /// @name Face Culling |
| 965 | //// |
| 966 | |
| 967 | enum DrawFace { |
bsalomon@google.com | 978c8c6 | 2012-05-21 14:45:49 +0000 | [diff] [blame] | 968 | kInvalid_DrawFace = -1, |
| 969 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 970 | kBoth_DrawFace, |
| 971 | kCCW_DrawFace, |
| 972 | kCW_DrawFace, |
| 973 | }; |
| 974 | |
| 975 | /** |
| 976 | * Controls whether clockwise, counterclockwise, or both faces are drawn. |
| 977 | * @param face the face(s) to draw. |
| 978 | */ |
| 979 | void setDrawFace(DrawFace face) { |
bsalomon@google.com | 978c8c6 | 2012-05-21 14:45:49 +0000 | [diff] [blame] | 980 | GrAssert(kInvalid_DrawFace != face); |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 981 | fCommon.fDrawFace = face; |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 982 | } |
| 983 | |
| 984 | /** |
| 985 | * Gets whether the target is drawing clockwise, counterclockwise, |
| 986 | * or both faces. |
| 987 | * @return the current draw face(s). |
| 988 | */ |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 989 | DrawFace getDrawFace() const { return fCommon.fDrawFace; } |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 990 | |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 991 | /// @} |
| 992 | |
| 993 | /////////////////////////////////////////////////////////////////////////// |
tomhudson@google.com | 62b0968 | 2011-11-09 16:39:17 +0000 | [diff] [blame] | 994 | |
tomhudson@google.com | f13f588 | 2012-06-25 17:27:28 +0000 | [diff] [blame] | 995 | bool isStageEnabled(int s) const { |
| 996 | GrAssert((unsigned)s < kNumStages); |
bsalomon@google.com | 08283af | 2012-10-26 13:01:20 +0000 | [diff] [blame] | 997 | return (NULL != fStages[s].getEffect()); |
tomhudson@google.com | f13f588 | 2012-06-25 17:27:28 +0000 | [diff] [blame] | 998 | } |
| 999 | |
bsalomon@google.com | 3d0835b | 2011-12-08 16:12:03 +0000 | [diff] [blame] | 1000 | bool operator ==(const GrDrawState& s) const { |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 1001 | if (fRenderTarget.get() != s.fRenderTarget.get() || fCommon != s.fCommon) { |
bsalomon@google.com | 8fe84b5 | 2012-03-26 15:24:27 +0000 | [diff] [blame] | 1002 | return false; |
| 1003 | } |
bsalomon@google.com | 3d0835b | 2011-12-08 16:12:03 +0000 | [diff] [blame] | 1004 | for (int i = 0; i < kNumStages; i++) { |
bsalomon@google.com | f2f8fc3 | 2012-07-18 18:25:07 +0000 | [diff] [blame] | 1005 | bool enabled = this->isStageEnabled(i); |
| 1006 | if (enabled != s.isStageEnabled(i)) { |
| 1007 | return false; |
| 1008 | } |
bsalomon@google.com | 08283af | 2012-10-26 13:01:20 +0000 | [diff] [blame] | 1009 | if (enabled && this->fStages[i] != s.fStages[i]) { |
bsalomon@google.com | 3d0835b | 2011-12-08 16:12:03 +0000 | [diff] [blame] | 1010 | return false; |
| 1011 | } |
| 1012 | } |
bsalomon@google.com | 3d0835b | 2011-12-08 16:12:03 +0000 | [diff] [blame] | 1013 | return true; |
| 1014 | } |
| 1015 | bool operator !=(const GrDrawState& s) const { return !(*this == s); } |
| 1016 | |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 1017 | GrDrawState& operator= (const GrDrawState& s) { |
| 1018 | this->setRenderTarget(s.fRenderTarget.get()); |
| 1019 | fCommon = s.fCommon; |
bsalomon@google.com | 3d0835b | 2011-12-08 16:12:03 +0000 | [diff] [blame] | 1020 | for (int i = 0; i < kNumStages; i++) { |
tomhudson@google.com | e742bf0 | 2012-07-13 19:54:19 +0000 | [diff] [blame] | 1021 | if (s.isStageEnabled(i)) { |
bsalomon@google.com | 08283af | 2012-10-26 13:01:20 +0000 | [diff] [blame] | 1022 | this->fStages[i] = s.fStages[i]; |
bsalomon@google.com | 3d0835b | 2011-12-08 16:12:03 +0000 | [diff] [blame] | 1023 | } |
| 1024 | } |
bsalomon@google.com | 3d0835b | 2011-12-08 16:12:03 +0000 | [diff] [blame] | 1025 | return *this; |
| 1026 | } |
| 1027 | |
| 1028 | private: |
bsalomon@google.com | 2e3d144 | 2012-03-26 20:33:54 +0000 | [diff] [blame] | 1029 | |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 1030 | /** Fields that are identical in GrDrawState and GrDrawState::DeferredState. */ |
| 1031 | struct CommonState { |
| 1032 | // These fields are roughly sorted by decreasing likelihood of being different in op== |
robertphillips@google.com | 4290330 | 2013-04-20 12:26:07 +0000 | [diff] [blame] | 1033 | GrColor fColor; |
| 1034 | SkMatrix fViewMatrix; |
| 1035 | GrBlendCoeff fSrcBlend; |
| 1036 | GrBlendCoeff fDstBlend; |
| 1037 | GrColor fBlendConstant; |
| 1038 | uint32_t fFlagBits; |
| 1039 | const GrVertexAttrib* fVAPtr; |
| 1040 | int fVACount; |
| 1041 | GrStencilSettings fStencilSettings; |
| 1042 | int fFirstCoverageStage; |
| 1043 | GrColor fCoverage; |
| 1044 | SkXfermode::Mode fColorFilterMode; |
| 1045 | GrColor fColorFilterColor; |
| 1046 | DrawFace fDrawFace; |
jvanverth@google.com | 054ae99 | 2013-04-01 20:06:51 +0000 | [diff] [blame] | 1047 | |
| 1048 | // This is simply a different representation of info in fVertexAttribs and thus does |
| 1049 | // not need to be compared in op==. |
| 1050 | int fFixedFunctionVertexAttribIndices[kGrFixedFunctionVertexAttribBindingCnt]; |
| 1051 | |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 1052 | bool operator== (const CommonState& other) const { |
jvanverth@google.com | 054ae99 | 2013-04-01 20:06:51 +0000 | [diff] [blame] | 1053 | bool result = fColor == other.fColor && |
| 1054 | fViewMatrix.cheapEqualTo(other.fViewMatrix) && |
| 1055 | fSrcBlend == other.fSrcBlend && |
| 1056 | fDstBlend == other.fDstBlend && |
| 1057 | fBlendConstant == other.fBlendConstant && |
| 1058 | fFlagBits == other.fFlagBits && |
robertphillips@google.com | 4290330 | 2013-04-20 12:26:07 +0000 | [diff] [blame] | 1059 | fVACount == other.fVACount && |
| 1060 | !memcmp(fVAPtr, other.fVAPtr, fVACount * sizeof(GrVertexAttrib)) && |
jvanverth@google.com | 054ae99 | 2013-04-01 20:06:51 +0000 | [diff] [blame] | 1061 | fStencilSettings == other.fStencilSettings && |
| 1062 | fFirstCoverageStage == other.fFirstCoverageStage && |
| 1063 | fCoverage == other.fCoverage && |
| 1064 | fColorFilterMode == other.fColorFilterMode && |
| 1065 | fColorFilterColor == other.fColorFilterColor && |
| 1066 | fDrawFace == other.fDrawFace; |
| 1067 | GrAssert(!result || 0 == memcmp(fFixedFunctionVertexAttribIndices, |
| 1068 | other.fFixedFunctionVertexAttribIndices, |
| 1069 | sizeof(fFixedFunctionVertexAttribIndices))); |
| 1070 | return result; |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 1071 | } |
| 1072 | bool operator!= (const CommonState& other) const { return !(*this == other); } |
| 1073 | }; |
bsalomon@google.com | 8fe84b5 | 2012-03-26 15:24:27 +0000 | [diff] [blame] | 1074 | |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 1075 | /** GrDrawState uses GrEffectStages to hold stage state which holds a ref on GrEffectRef. |
| 1076 | DeferredState must directly reference GrEffects, however. */ |
| 1077 | struct SavedEffectStage { |
| 1078 | SavedEffectStage() : fEffect(NULL) {} |
| 1079 | const GrEffect* fEffect; |
| 1080 | GrEffectStage::SavedCoordChange fCoordChange; |
| 1081 | }; |
| 1082 | |
| 1083 | public: |
| 1084 | /** |
| 1085 | * DeferredState contains all of the data of a GrDrawState but does not hold refs on GrResource |
| 1086 | * objects. Resources are allowed to hit zero ref count while in DeferredStates. Their internal |
| 1087 | * dispose mechanism returns them to the cache. This allows recycling resources through the |
| 1088 | * the cache while they are in a deferred draw queue. |
| 1089 | */ |
| 1090 | class DeferredState { |
| 1091 | public: |
| 1092 | DeferredState() : fRenderTarget(NULL) { |
| 1093 | GR_DEBUGCODE(fInitialized = false;) |
| 1094 | } |
| 1095 | // TODO: Remove this when DeferredState no longer holds a ref to the RT |
| 1096 | ~DeferredState() { SkSafeUnref(fRenderTarget); } |
| 1097 | |
| 1098 | void saveFrom(const GrDrawState& drawState) { |
| 1099 | fCommon = drawState.fCommon; |
| 1100 | // TODO: Here we will copy the GrRenderTarget pointer without taking a ref. |
| 1101 | fRenderTarget = drawState.fRenderTarget.get(); |
| 1102 | SkSafeRef(fRenderTarget); |
| 1103 | // Here we ref the effects directly rather than the effect-refs. TODO: When the effect- |
| 1104 | // ref gets fully unref'ed it will cause the underlying effect to unref its resources |
| 1105 | // and recycle them to the cache (if no one else is holding a ref to the resources). |
| 1106 | for (int i = 0; i < kNumStages; ++i) { |
| 1107 | fStages[i].saveFrom(drawState.fStages[i]); |
| 1108 | } |
| 1109 | GR_DEBUGCODE(fInitialized = true;) |
| 1110 | } |
| 1111 | |
| 1112 | void restoreTo(GrDrawState* drawState) { |
| 1113 | GrAssert(fInitialized); |
| 1114 | drawState->fCommon = fCommon; |
| 1115 | drawState->setRenderTarget(fRenderTarget); |
| 1116 | for (int i = 0; i < kNumStages; ++i) { |
| 1117 | fStages[i].restoreTo(&drawState->fStages[i]); |
| 1118 | } |
| 1119 | } |
| 1120 | |
| 1121 | bool isEqual(const GrDrawState& state) const { |
| 1122 | if (fRenderTarget != state.fRenderTarget.get() || fCommon != state.fCommon) { |
| 1123 | return false; |
| 1124 | } |
| 1125 | for (int i = 0; i < kNumStages; ++i) { |
bsalomon@google.com | dcd69bf | 2013-01-24 18:28:51 +0000 | [diff] [blame] | 1126 | if (!fStages[i].isEqual(state.fStages[i])) { |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 1127 | return false; |
| 1128 | } |
| 1129 | } |
| 1130 | return true; |
| 1131 | } |
| 1132 | |
| 1133 | private: |
jvanverth@google.com | 9b855c7 | 2013-03-01 18:21:22 +0000 | [diff] [blame] | 1134 | GrRenderTarget* fRenderTarget; |
| 1135 | CommonState fCommon; |
jvanverth@google.com | 9b855c7 | 2013-03-01 18:21:22 +0000 | [diff] [blame] | 1136 | GrEffectStage::DeferredStage fStages[kNumStages]; |
bsalomon@google.com | ca43208 | 2013-01-23 19:53:46 +0000 | [diff] [blame] | 1137 | |
| 1138 | GR_DEBUGCODE(bool fInitialized;) |
| 1139 | }; |
| 1140 | |
| 1141 | private: |
jvanverth@google.com | 9b855c7 | 2013-03-01 18:21:22 +0000 | [diff] [blame] | 1142 | |
| 1143 | SkAutoTUnref<GrRenderTarget> fRenderTarget; |
| 1144 | CommonState fCommon; |
jvanverth@google.com | 9b855c7 | 2013-03-01 18:21:22 +0000 | [diff] [blame] | 1145 | GrEffectStage fStages[kNumStages]; |
bsalomon@google.com | 8f9cbd6 | 2011-12-09 15:55:34 +0000 | [diff] [blame] | 1146 | |
robertphillips@google.com | 4290330 | 2013-04-20 12:26:07 +0000 | [diff] [blame] | 1147 | /** |
| 1148 | * Sets vertex attributes for next draw. |
| 1149 | * |
| 1150 | * @param attribs the array of vertex attributes to set. |
| 1151 | * @param count the number of attributes being set, limited to kMaxVertexAttribCnt. |
| 1152 | */ |
| 1153 | void setVertexAttribs(const GrVertexAttrib attribs[], int count); |
| 1154 | |
reed@google.com | fa35e3d | 2012-06-26 20:16:17 +0000 | [diff] [blame] | 1155 | typedef GrRefCnt INHERITED; |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 1156 | }; |
| 1157 | |
bsalomon@google.com | 2b44673 | 2013-02-12 16:47:41 +0000 | [diff] [blame] | 1158 | GR_MAKE_BITFIELD_OPS(GrDrawState::BlendOptFlags); |
| 1159 | |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 1160 | #endif |