epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 1 | |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 2 | /* |
epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 3 | * Copyright 2010 Google Inc. |
| 4 | * |
| 5 | * Use of this source code is governed by a BSD-style license that can be |
| 6 | * found in the LICENSE file. |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 7 | */ |
| 8 | |
| 9 | |
epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 10 | |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 11 | #ifndef GrDrawTarget_DEFINED |
| 12 | #define GrDrawTarget_DEFINED |
| 13 | |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 14 | #include "GrDrawState.h" |
bsalomon@google.com | 934c570 | 2012-03-20 21:17:58 +0000 | [diff] [blame] | 15 | #include "GrIndexBuffer.h" |
bsalomon@google.com | b9086a0 | 2012-11-01 18:02:54 +0000 | [diff] [blame] | 16 | #include "SkMatrix.h" |
bsalomon@google.com | aa5b673 | 2011-07-29 15:13:20 +0000 | [diff] [blame] | 17 | #include "GrRefCnt.h" |
bsalomon@google.com | a320194 | 2012-06-21 19:58:20 +0000 | [diff] [blame] | 18 | #include "GrTemplates.h" |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 19 | |
sugoi@google.com | 12b4e27 | 2012-12-06 20:13:11 +0000 | [diff] [blame^] | 20 | #include "SkPath.h" |
Scroggo | 97c88c2 | 2011-05-11 14:05:25 +0000 | [diff] [blame] | 21 | #include "SkXfermode.h" |
bsalomon@google.com | 46f7afb | 2012-01-18 19:51:55 +0000 | [diff] [blame] | 22 | #include "SkTLazy.h" |
robertphillips@google.com | a2d7148 | 2012-08-01 20:08:47 +0000 | [diff] [blame] | 23 | #include "SkTArray.h" |
Scroggo | 97c88c2 | 2011-05-11 14:05:25 +0000 | [diff] [blame] | 24 | |
robertphillips@google.com | a2d7148 | 2012-08-01 20:08:47 +0000 | [diff] [blame] | 25 | class GrClipData; |
bsalomon@google.com | 64aef2b | 2012-06-11 15:36:13 +0000 | [diff] [blame] | 26 | class GrPath; |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 27 | class GrVertexBuffer; |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 28 | |
sugoi@google.com | 12b4e27 | 2012-12-06 20:13:11 +0000 | [diff] [blame^] | 29 | class SkStroke; |
| 30 | |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 31 | class GrDrawTarget : public GrRefCnt { |
bsalomon@google.com | f660187 | 2012-08-28 21:11:35 +0000 | [diff] [blame] | 32 | protected: |
| 33 | /** This helper class allows GrDrawTarget subclasses to set the caps values without having to be |
| 34 | made a friend of GrDrawTarget::Caps. */ |
| 35 | class CapsInternals { |
| 36 | public: |
bsalomon@google.com | 18c9c19 | 2011-09-22 21:01:31 +0000 | [diff] [blame] | 37 | bool f8BitPaletteSupport : 1; |
bsalomon@google.com | 18c9c19 | 2011-09-22 21:01:31 +0000 | [diff] [blame] | 38 | bool fNPOTTextureTileSupport : 1; |
bsalomon@google.com | 18c9c19 | 2011-09-22 21:01:31 +0000 | [diff] [blame] | 39 | bool fTwoSidedStencilSupport : 1; |
| 40 | bool fStencilWrapOpsSupport : 1; |
| 41 | bool fHWAALineSupport : 1; |
bsalomon@google.com | 18c9c19 | 2011-09-22 21:01:31 +0000 | [diff] [blame] | 42 | bool fShaderDerivativeSupport : 1; |
bsalomon@google.com | edfe1aa | 2011-09-29 14:40:26 +0000 | [diff] [blame] | 43 | bool fGeometryShaderSupport : 1; |
bsalomon@google.com | 18c9c19 | 2011-09-22 21:01:31 +0000 | [diff] [blame] | 44 | bool fFSAASupport : 1; |
| 45 | bool fDualSourceBlendingSupport : 1; |
| 46 | bool fBufferLockSupport : 1; |
bsalomon@google.com | 64aef2b | 2012-06-11 15:36:13 +0000 | [diff] [blame] | 47 | bool fPathStencilingSupport : 1; |
bsalomon@google.com | 18c9c19 | 2011-09-22 21:01:31 +0000 | [diff] [blame] | 48 | int fMaxRenderTargetSize; |
| 49 | int fMaxTextureSize; |
| 50 | }; |
| 51 | |
bsalomon@google.com | f660187 | 2012-08-28 21:11:35 +0000 | [diff] [blame] | 52 | public: |
| 53 | SK_DECLARE_INST_COUNT(GrDrawTarget) |
| 54 | |
| 55 | /** |
| 56 | * Represents the draw target capabilities. |
| 57 | */ |
| 58 | class Caps { |
| 59 | public: |
| 60 | Caps() { memset(this, 0, sizeof(Caps)); } |
| 61 | Caps(const Caps& c) { *this = c; } |
| 62 | Caps& operator= (const Caps& c) { |
| 63 | memcpy(this, &c, sizeof(Caps)); |
| 64 | return *this; |
| 65 | } |
| 66 | void print() const; |
| 67 | |
| 68 | bool eightBitPaletteSupport() const { return fInternals.f8BitPaletteSupport; } |
| 69 | bool npotTextureTileSupport() const { return fInternals.fNPOTTextureTileSupport; } |
| 70 | bool twoSidedStencilSupport() const { return fInternals.fTwoSidedStencilSupport; } |
| 71 | bool stencilWrapOpsSupport() const { return fInternals.fStencilWrapOpsSupport; } |
| 72 | bool hwAALineSupport() const { return fInternals.fHWAALineSupport; } |
| 73 | bool shaderDerivativeSupport() const { return fInternals.fShaderDerivativeSupport; } |
| 74 | bool geometryShaderSupport() const { return fInternals.fGeometryShaderSupport; } |
| 75 | bool fsaaSupport() const { return fInternals.fFSAASupport; } |
| 76 | bool dualSourceBlendingSupport() const { return fInternals.fDualSourceBlendingSupport; } |
| 77 | bool bufferLockSupport() const { return fInternals.fBufferLockSupport; } |
| 78 | bool pathStencilingSupport() const { return fInternals.fPathStencilingSupport; } |
| 79 | |
| 80 | int maxRenderTargetSize() const { return fInternals.fMaxRenderTargetSize; } |
| 81 | int maxTextureSize() const { return fInternals.fMaxTextureSize; } |
| 82 | private: |
| 83 | CapsInternals fInternals; |
bsalomon@google.com | 0d82fe5 | 2012-08-28 21:39:15 +0000 | [diff] [blame] | 84 | friend class GrDrawTarget; // to set values of fInternals |
bsalomon@google.com | f660187 | 2012-08-28 21:11:35 +0000 | [diff] [blame] | 85 | }; |
| 86 | |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 87 | /////////////////////////////////////////////////////////////////////////// |
| 88 | |
| 89 | GrDrawTarget(); |
bsalomon@google.com | 25fb21f | 2011-06-21 18:17:25 +0000 | [diff] [blame] | 90 | virtual ~GrDrawTarget(); |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 91 | |
| 92 | /** |
bsalomon@google.com | 18c9c19 | 2011-09-22 21:01:31 +0000 | [diff] [blame] | 93 | * Gets the capabilities of the draw target. |
| 94 | */ |
| 95 | const Caps& getCaps() const { return fCaps; } |
| 96 | |
| 97 | /** |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 98 | * Sets the current clip to the region specified by clip. All draws will be |
| 99 | * clipped against this clip if kClip_StateBit is enabled. |
| 100 | * |
bsalomon@google.com | 5aaa69e | 2011-03-04 20:29:08 +0000 | [diff] [blame] | 101 | * Setting the clip may (or may not) zero out the client's stencil bits. |
| 102 | * |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 103 | * @param description of the clipping region |
| 104 | */ |
robertphillips@google.com | beb1af7 | 2012-07-26 18:52:16 +0000 | [diff] [blame] | 105 | void setClip(const GrClipData* clip); |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 106 | |
| 107 | /** |
| 108 | * Gets the current clip. |
| 109 | * |
| 110 | * @return the clip. |
| 111 | */ |
robertphillips@google.com | beb1af7 | 2012-07-26 18:52:16 +0000 | [diff] [blame] | 112 | const GrClipData* getClip() const; |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 113 | |
bsalomon@google.com | a5d056a | 2012-03-27 15:59:58 +0000 | [diff] [blame] | 114 | /** |
| 115 | * Sets the draw state object for the draw target. Note that this does not |
| 116 | * make a copy. The GrDrawTarget will take a reference to passed object. |
| 117 | * Passing NULL will cause the GrDrawTarget to use its own internal draw |
| 118 | * state object rather than an externally provided one. |
| 119 | */ |
| 120 | void setDrawState(GrDrawState* drawState); |
| 121 | |
| 122 | /** |
| 123 | * Read-only access to the GrDrawTarget's current draw state. |
| 124 | */ |
| 125 | const GrDrawState& getDrawState() const { return *fDrawState; } |
| 126 | |
| 127 | /** |
| 128 | * Read-write access to the GrDrawTarget's current draw state. Note that |
| 129 | * this doesn't ref. |
| 130 | */ |
| 131 | GrDrawState* drawState() { return fDrawState; } |
bsalomon@google.com | 3d0835b | 2011-12-08 16:12:03 +0000 | [diff] [blame] | 132 | |
bsalomon@google.com | 3d0835b | 2011-12-08 16:12:03 +0000 | [diff] [blame] | 133 | /** |
bsalomon@google.com | d46e242 | 2011-09-23 17:40:07 +0000 | [diff] [blame] | 134 | * Color alpha and coverage are two inputs to the drawing pipeline. For some |
| 135 | * blend modes it is safe to fold the coverage into constant or per-vertex |
| 136 | * color alpha value. For other blend modes they must be handled separately. |
| 137 | * Depending on features available in the underlying 3D API this may or may |
| 138 | * not be possible. |
| 139 | * |
bsalomon@google.com | e79c815 | 2012-03-29 19:07:12 +0000 | [diff] [blame] | 140 | * This function considers the current draw state and the draw target's |
| 141 | * capabilities to determine whether coverage can be handled correctly. The |
| 142 | * following assumptions are made: |
| 143 | * 1. The caller intends to somehow specify coverage. This can be |
| 144 | * specified either by enabling a coverage stage on the GrDrawState or |
| 145 | * via the vertex layout. |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 146 | * 2. Other than enabling coverage stages, the current configuration of |
bsalomon@google.com | e79c815 | 2012-03-29 19:07:12 +0000 | [diff] [blame] | 147 | * the target's GrDrawState is as it will be at draw time. |
| 148 | * 3. If a vertex source has not yet been specified then all stages with |
| 149 | * non-NULL textures will be referenced by the vertex layout. |
bsalomon@google.com | d46e242 | 2011-09-23 17:40:07 +0000 | [diff] [blame] | 150 | */ |
| 151 | bool canApplyCoverage() const; |
| 152 | |
| 153 | /** |
| 154 | * Determines whether incorporating partial pixel coverage into the constant |
| 155 | * color specified by setColor or per-vertex colors will give the right |
bsalomon@google.com | e79c815 | 2012-03-29 19:07:12 +0000 | [diff] [blame] | 156 | * blending result. If a vertex source has not yet been specified then |
| 157 | * the function assumes that all stages with non-NULL textures will be |
| 158 | * referenced by the vertex layout. |
bsalomon@google.com | d46e242 | 2011-09-23 17:40:07 +0000 | [diff] [blame] | 159 | */ |
bsalomon@google.com | 86c1f71 | 2011-10-12 14:54:26 +0000 | [diff] [blame] | 160 | bool canTweakAlphaForCoverage() const; |
bsalomon@google.com | d46e242 | 2011-09-23 17:40:07 +0000 | [diff] [blame] | 161 | |
senorblanco@chromium.org | 92e0f22 | 2011-05-12 15:49:15 +0000 | [diff] [blame] | 162 | /** |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 163 | * Given the current draw state and hw support, will HW AA lines be used |
bsalomon@google.com | e79c815 | 2012-03-29 19:07:12 +0000 | [diff] [blame] | 164 | * (if line primitive type is drawn)? If a vertex source has not yet been |
| 165 | * specified then the function assumes that all stages with non-NULL |
| 166 | * textures will be referenced by the vertex layout. |
bsalomon@google.com | 471d471 | 2011-08-23 15:45:25 +0000 | [diff] [blame] | 167 | */ |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 168 | bool willUseHWAALines() const; |
bsalomon@google.com | 471d471 | 2011-08-23 15:45:25 +0000 | [diff] [blame] | 169 | |
bsalomon@google.com | 3d0835b | 2011-12-08 16:12:03 +0000 | [diff] [blame] | 170 | /** |
bsalomon@google.com | a310826 | 2011-10-10 14:08:47 +0000 | [diff] [blame] | 171 | * The format of vertices is represented as a bitfield of flags. |
| 172 | * Flags that indicate the layout of vertex data. Vertices always contain |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 173 | * positions and may also contain up to GrDrawState::kMaxTexCoords sets |
tomhudson@google.com | b213ed8 | 2012-06-25 15:22:12 +0000 | [diff] [blame] | 174 | * of 2D texture coordinates, per-vertex colors, and per-vertex coverage. |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 175 | * Each stage can |
bsalomon@google.com | a310826 | 2011-10-10 14:08:47 +0000 | [diff] [blame] | 176 | * use any of the texture coordinates as its input texture coordinates or it |
| 177 | * may use the positions as texture coordinates. |
| 178 | * |
| 179 | * If no texture coordinates are specified for a stage then the stage is |
| 180 | * disabled. |
| 181 | * |
| 182 | * Only one type of texture coord can be specified per stage. For |
| 183 | * example StageTexCoordVertexLayoutBit(0, 2) and |
| 184 | * StagePosAsTexCoordVertexLayoutBit(0) cannot both be specified. |
| 185 | * |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 186 | * The order in memory is always (position, texture coord 0, ..., color, |
| 187 | * coverage) with any unused fields omitted. Note that this means that if |
bsalomon@google.com | a310826 | 2011-10-10 14:08:47 +0000 | [diff] [blame] | 188 | * only texture coordinates 1 is referenced then there is no texture |
| 189 | * coordinates 0 and the order would be (position, texture coordinate 1 |
| 190 | * [, color][, coverage]). |
| 191 | */ |
| 192 | |
| 193 | /** |
| 194 | * Generates a bit indicating that a texture stage uses texture coordinates |
| 195 | * |
bsalomon@google.com | 08283af | 2012-10-26 13:01:20 +0000 | [diff] [blame] | 196 | * @param stageIdx the stage that will use texture coordinates. |
bsalomon@google.com | a310826 | 2011-10-10 14:08:47 +0000 | [diff] [blame] | 197 | * @param texCoordIdx the index of the texture coordinates to use |
| 198 | * |
| 199 | * @return the bit to add to a GrVertexLayout bitfield. |
| 200 | */ |
bsalomon@google.com | 08283af | 2012-10-26 13:01:20 +0000 | [diff] [blame] | 201 | static int StageTexCoordVertexLayoutBit(int stageIdx, int texCoordIdx) { |
| 202 | GrAssert(stageIdx < GrDrawState::kNumStages); |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 203 | GrAssert(texCoordIdx < GrDrawState::kMaxTexCoords); |
bsalomon@google.com | 08283af | 2012-10-26 13:01:20 +0000 | [diff] [blame] | 204 | return 1 << (stageIdx + (texCoordIdx * GrDrawState::kNumStages)); |
bsalomon@google.com | a310826 | 2011-10-10 14:08:47 +0000 | [diff] [blame] | 205 | } |
| 206 | |
bsalomon@google.com | 08283af | 2012-10-26 13:01:20 +0000 | [diff] [blame] | 207 | static bool StageUsesTexCoords(GrVertexLayout layout, int stageIdx); |
tomhudson@google.com | b213ed8 | 2012-06-25 15:22:12 +0000 | [diff] [blame] | 208 | |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 209 | private: |
bsalomon@google.com | 52544c7 | 2012-07-10 15:06:59 +0000 | [diff] [blame] | 210 | // non-stage bits start at this index. |
| 211 | static const int STAGE_BIT_CNT = GrDrawState::kNumStages * |
| 212 | GrDrawState::kMaxTexCoords; |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 213 | public: |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame] | 214 | |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 215 | /** |
| 216 | * Additional Bits that can be specified in GrVertexLayout. |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 217 | */ |
| 218 | enum VertexLayoutBits { |
bsalomon@google.com | a310826 | 2011-10-10 14:08:47 +0000 | [diff] [blame] | 219 | /* vertices have colors (GrColor) */ |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 220 | kColor_VertexLayoutBit = 1 << (STAGE_BIT_CNT + 0), |
bsalomon@google.com | 2401ae8 | 2012-01-17 21:03:05 +0000 | [diff] [blame] | 221 | /* vertices have coverage (GrColor) |
bsalomon@google.com | e10f6fd | 2011-10-11 20:15:26 +0000 | [diff] [blame] | 222 | */ |
bsalomon@google.com | a310826 | 2011-10-10 14:08:47 +0000 | [diff] [blame] | 223 | kCoverage_VertexLayoutBit = 1 << (STAGE_BIT_CNT + 1), |
bsalomon@google.com | aeb2160 | 2011-08-30 18:13:44 +0000 | [diff] [blame] | 224 | /* Use text vertices. (Pos and tex coords may be a different type for |
bsalomon@google.com | e10f6fd | 2011-10-11 20:15:26 +0000 | [diff] [blame] | 225 | * text [GrGpuTextVertex vs GrPoint].) |
| 226 | */ |
bsalomon@google.com | a310826 | 2011-10-10 14:08:47 +0000 | [diff] [blame] | 227 | kTextFormat_VertexLayoutBit = 1 << (STAGE_BIT_CNT + 2), |
bsalomon@google.com | aeb2160 | 2011-08-30 18:13:44 +0000 | [diff] [blame] | 228 | |
bsalomon@google.com | e10f6fd | 2011-10-11 20:15:26 +0000 | [diff] [blame] | 229 | /* Each vertex specificies an edge. Distance to the edge is used to |
bsalomon@google.com | cff5608 | 2012-01-11 15:33:20 +0000 | [diff] [blame] | 230 | * compute a coverage. See GrDrawState::setVertexEdgeType(). |
bsalomon@google.com | e10f6fd | 2011-10-11 20:15:26 +0000 | [diff] [blame] | 231 | */ |
bsalomon@google.com | a310826 | 2011-10-10 14:08:47 +0000 | [diff] [blame] | 232 | kEdge_VertexLayoutBit = 1 << (STAGE_BIT_CNT + 3), |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 233 | // for below assert |
bsalomon@google.com | d302f14 | 2011-03-03 13:54:13 +0000 | [diff] [blame] | 234 | kDummyVertexLayoutBit, |
| 235 | kHighVertexLayoutBit = kDummyVertexLayoutBit - 1 |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 236 | }; |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 237 | // make sure we haven't exceeded the number of bits in GrVertexLayout. |
bsalomon@google.com | 4be283f | 2011-04-19 21:15:09 +0000 | [diff] [blame] | 238 | GR_STATIC_ASSERT(kHighVertexLayoutBit < ((uint64_t)1 << 8*sizeof(GrVertexLayout))); |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 239 | |
| 240 | /** |
bsalomon@google.com | e3d7095 | 2012-03-13 12:40:53 +0000 | [diff] [blame] | 241 | * There are three types of "sources" of geometry (vertices and indices) for |
| 242 | * draw calls made on the target. When performing an indexed draw, the |
| 243 | * indices and vertices can use different source types. Once a source is |
bsalomon@google.com | 934c570 | 2012-03-20 21:17:58 +0000 | [diff] [blame] | 244 | * specified it can be used for multiple draws. However, the time at which |
| 245 | * the geometry data is no longer editable depends on the source type. |
bsalomon@google.com | 25fb21f | 2011-06-21 18:17:25 +0000 | [diff] [blame] | 246 | * |
| 247 | * Sometimes it is necessary to perform a draw while upstack code has |
bsalomon@google.com | e3d7095 | 2012-03-13 12:40:53 +0000 | [diff] [blame] | 248 | * already specified geometry that it isn't finished with. So there are push |
| 249 | * and pop methods. This allows the client to push the sources, draw |
| 250 | * something using alternate sources, and then pop to restore the original |
| 251 | * sources. |
bsalomon@google.com | 1c13c96 | 2011-02-14 16:51:21 +0000 | [diff] [blame] | 252 | * |
bsalomon@google.com | e3d7095 | 2012-03-13 12:40:53 +0000 | [diff] [blame] | 253 | * Aside from pushes and pops, a source remains valid until another source |
| 254 | * is set or resetVertexSource / resetIndexSource is called. Drawing from |
| 255 | * a reset source is an error. |
| 256 | * |
| 257 | * The three types of sources are: |
| 258 | * |
| 259 | * 1. A cpu array (set*SourceToArray). This is useful when the caller |
| 260 | * already provided vertex data in a format compatible with a |
| 261 | * GrVertexLayout. The data in the array is consumed at the time that |
| 262 | * set*SourceToArray is called and subsequent edits to the array will not |
| 263 | * be reflected in draws. |
bsalomon@google.com | 1c13c96 | 2011-02-14 16:51:21 +0000 | [diff] [blame] | 264 | * |
bsalomon@google.com | 25fb21f | 2011-06-21 18:17:25 +0000 | [diff] [blame] | 265 | * 2. Reserve. This is most useful when the caller has data it must |
| 266 | * transform before drawing and is not long-lived. The caller requests |
| 267 | * that the draw target make room for some amount of vertex and/or index |
| 268 | * data. The target provides ptrs to hold the vertex and/or index data. |
| 269 | * |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 270 | * The data is writable up until the next drawIndexed, drawNonIndexed, |
bsalomon@google.com | 934c570 | 2012-03-20 21:17:58 +0000 | [diff] [blame] | 271 | * drawIndexedInstances, or pushGeometrySource. At this point the data is |
| 272 | * frozen and the ptrs are no longer valid. |
bsalomon@google.com | 1c13c96 | 2011-02-14 16:51:21 +0000 | [diff] [blame] | 273 | * |
bsalomon@google.com | e3d7095 | 2012-03-13 12:40:53 +0000 | [diff] [blame] | 274 | * Where the space is allocated and how it is uploaded to the GPU is |
| 275 | * subclass-dependent. |
| 276 | * |
bsalomon@google.com | 1c13c96 | 2011-02-14 16:51:21 +0000 | [diff] [blame] | 277 | * 3. Vertex and Index Buffers. This is most useful for geometry that will |
bsalomon@google.com | e3d7095 | 2012-03-13 12:40:53 +0000 | [diff] [blame] | 278 | * is long-lived. When the data in the buffer is consumed depends on the |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 279 | * GrDrawTarget subclass. For deferred subclasses the caller has to |
bsalomon@google.com | e3d7095 | 2012-03-13 12:40:53 +0000 | [diff] [blame] | 280 | * guarantee that the data is still available in the buffers at playback. |
| 281 | * (TODO: Make this more automatic as we have done for read/write pixels) |
bsalomon@google.com | 1c13c96 | 2011-02-14 16:51:21 +0000 | [diff] [blame] | 282 | */ |
| 283 | |
| 284 | /** |
bsalomon@google.com | e3d7095 | 2012-03-13 12:40:53 +0000 | [diff] [blame] | 285 | * Reserves space for vertices and/or indices. Zero can be specifed as |
| 286 | * either the vertex or index count if the caller desires to only reserve |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 287 | * space for only indices or only vertices. If zero is specifed for |
bsalomon@google.com | e3d7095 | 2012-03-13 12:40:53 +0000 | [diff] [blame] | 288 | * vertexCount then the vertex source will be unmodified and likewise for |
| 289 | * indexCount. |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 290 | * |
bsalomon@google.com | e3d7095 | 2012-03-13 12:40:53 +0000 | [diff] [blame] | 291 | * If the function returns true then the reserve suceeded and the vertices |
| 292 | * and indices pointers will point to the space created. |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 293 | * |
bsalomon@google.com | e3d7095 | 2012-03-13 12:40:53 +0000 | [diff] [blame] | 294 | * If the target cannot make space for the request then this function will |
| 295 | * return false. If vertexCount was non-zero then upon failure the vertex |
| 296 | * source is reset and likewise for indexCount. |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 297 | * |
bsalomon@google.com | e3d7095 | 2012-03-13 12:40:53 +0000 | [diff] [blame] | 298 | * The pointers to the space allocated for vertices and indices remain valid |
bsalomon@google.com | 934c570 | 2012-03-20 21:17:58 +0000 | [diff] [blame] | 299 | * until a drawIndexed, drawNonIndexed, drawIndexedInstances, or push/ |
| 300 | * popGeomtrySource is called. At that point logically a snapshot of the |
| 301 | * data is made and the pointers are invalid. |
bsalomon@google.com | 1c13c96 | 2011-02-14 16:51:21 +0000 | [diff] [blame] | 302 | * |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 303 | * @param vertexLayout the format of vertices (ignored if vertexCount == 0). |
bsalomon@google.com | e3d7095 | 2012-03-13 12:40:53 +0000 | [diff] [blame] | 304 | * @param vertexCount the number of vertices to reserve space for. Can be |
| 305 | * 0. |
bsalomon@google.com | 25fb21f | 2011-06-21 18:17:25 +0000 | [diff] [blame] | 306 | * @param indexCount the number of indices to reserve space for. Can be 0. |
bsalomon@google.com | e3d7095 | 2012-03-13 12:40:53 +0000 | [diff] [blame] | 307 | * @param vertices will point to reserved vertex space if vertexCount is |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 308 | * non-zero. Illegal to pass NULL if vertexCount > 0. |
bsalomon@google.com | 25fb21f | 2011-06-21 18:17:25 +0000 | [diff] [blame] | 309 | * @param indices will point to reserved index space if indexCount is |
| 310 | * non-zero. Illegal to pass NULL if indexCount > 0. |
| 311 | */ |
bsalomon@google.com | 9780538 | 2012-03-13 14:32:07 +0000 | [diff] [blame] | 312 | bool reserveVertexAndIndexSpace(GrVertexLayout vertexLayout, |
| 313 | int vertexCount, |
| 314 | int indexCount, |
| 315 | void** vertices, |
| 316 | void** indices); |
bsalomon@google.com | 25fb21f | 2011-06-21 18:17:25 +0000 | [diff] [blame] | 317 | |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 318 | /** |
| 319 | * Provides hints to caller about the number of vertices and indices |
| 320 | * that can be allocated cheaply. This can be useful if caller is reserving |
| 321 | * space but doesn't know exactly how much geometry is needed. |
| 322 | * |
| 323 | * Also may hint whether the draw target should be flushed first. This is |
| 324 | * useful for deferred targets. |
| 325 | * |
| 326 | * @param vertexLayout layout of vertices caller would like to reserve |
| 327 | * @param vertexCount in: hint about how many vertices the caller would |
| 328 | * like to allocate. |
| 329 | * out: a hint about the number of vertices that can be |
| 330 | * allocated cheaply. Negative means no hint. |
| 331 | * Ignored if NULL. |
| 332 | * @param indexCount in: hint about how many indices the caller would |
| 333 | * like to allocate. |
| 334 | * out: a hint about the number of indices that can be |
| 335 | * allocated cheaply. Negative means no hint. |
| 336 | * Ignored if NULL. |
| 337 | * |
| 338 | * @return true if target should be flushed based on the input values. |
| 339 | */ |
| 340 | virtual bool geometryHints(GrVertexLayout vertexLayout, |
bsalomon@google.com | 1c13c96 | 2011-02-14 16:51:21 +0000 | [diff] [blame] | 341 | int* vertexCount, |
| 342 | int* indexCount) const; |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 343 | |
| 344 | /** |
bsalomon@google.com | 1c13c96 | 2011-02-14 16:51:21 +0000 | [diff] [blame] | 345 | * Sets source of vertex data for the next draw. Array must contain |
| 346 | * the vertex data when this is called. |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 347 | * |
| 348 | * @param array cpu array containing vertex data. |
bsalomon@google.com | 1c13c96 | 2011-02-14 16:51:21 +0000 | [diff] [blame] | 349 | * @param size size of the vertex data. |
| 350 | * @param vertexCount the number of vertices in the array. |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 351 | */ |
bsalomon@google.com | 1c13c96 | 2011-02-14 16:51:21 +0000 | [diff] [blame] | 352 | void setVertexSourceToArray(GrVertexLayout vertexLayout, |
| 353 | const void* vertexArray, |
| 354 | int vertexCount); |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 355 | |
| 356 | /** |
bsalomon@google.com | 1c13c96 | 2011-02-14 16:51:21 +0000 | [diff] [blame] | 357 | * Sets source of index data for the next indexed draw. Array must contain |
| 358 | * the indices when this is called. |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 359 | * |
bsalomon@google.com | 1c13c96 | 2011-02-14 16:51:21 +0000 | [diff] [blame] | 360 | * @param array cpu array containing index data. |
| 361 | * @param indexCount the number of indices in the array. |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 362 | */ |
bsalomon@google.com | 1c13c96 | 2011-02-14 16:51:21 +0000 | [diff] [blame] | 363 | void setIndexSourceToArray(const void* indexArray, int indexCount); |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 364 | |
| 365 | /** |
| 366 | * Sets source of vertex data for the next draw. Data does not have to be |
bsalomon@google.com | 934c570 | 2012-03-20 21:17:58 +0000 | [diff] [blame] | 367 | * in the buffer until drawIndexed, drawNonIndexed, or drawIndexedInstances. |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 368 | * |
| 369 | * @param buffer vertex buffer containing vertex data. Must be |
| 370 | * unlocked before draw call. |
| 371 | * @param vertexLayout layout of the vertex data in the buffer. |
| 372 | */ |
bsalomon@google.com | 1c13c96 | 2011-02-14 16:51:21 +0000 | [diff] [blame] | 373 | void setVertexSourceToBuffer(GrVertexLayout vertexLayout, |
| 374 | const GrVertexBuffer* buffer); |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 375 | |
| 376 | /** |
| 377 | * Sets source of index data for the next indexed draw. Data does not have |
bsalomon@google.com | 934c570 | 2012-03-20 21:17:58 +0000 | [diff] [blame] | 378 | * to be in the buffer until drawIndexed. |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 379 | * |
| 380 | * @param buffer index buffer containing indices. Must be unlocked |
| 381 | * before indexed draw call. |
| 382 | */ |
| 383 | void setIndexSourceToBuffer(const GrIndexBuffer* buffer); |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 384 | |
bsalomon@google.com | 25fb21f | 2011-06-21 18:17:25 +0000 | [diff] [blame] | 385 | /** |
| 386 | * Resets vertex source. Drawing from reset vertices is illegal. Set vertex |
| 387 | * source to reserved, array, or buffer before next draw. May be able to free |
| 388 | * up temporary storage allocated by setVertexSourceToArray or |
| 389 | * reserveVertexSpace. |
| 390 | */ |
| 391 | void resetVertexSource(); |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 392 | |
bsalomon@google.com | 25fb21f | 2011-06-21 18:17:25 +0000 | [diff] [blame] | 393 | /** |
| 394 | * Resets index source. Indexed Drawing from reset indices is illegal. Set |
| 395 | * index source to reserved, array, or buffer before next indexed draw. May |
| 396 | * be able to free up temporary storage allocated by setIndexSourceToArray |
| 397 | * or reserveIndexSpace. |
| 398 | */ |
bsalomon@google.com | 9780538 | 2012-03-13 14:32:07 +0000 | [diff] [blame] | 399 | void resetIndexSource(); |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 400 | |
bsalomon@google.com | 9780538 | 2012-03-13 14:32:07 +0000 | [diff] [blame] | 401 | /** |
| 402 | * Query to find out if the vertex or index source is reserved. |
| 403 | */ |
| 404 | bool hasReservedVerticesOrIndices() const { |
bsalomon@google.com | 73d98aa | 2012-03-13 14:41:19 +0000 | [diff] [blame] | 405 | return kReserved_GeometrySrcType == this->getGeomSrc().fVertexSrc || |
bsalomon@google.com | 9780538 | 2012-03-13 14:32:07 +0000 | [diff] [blame] | 406 | kReserved_GeometrySrcType == this->getGeomSrc().fIndexSrc; |
| 407 | } |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 408 | |
| 409 | /** |
bsalomon@google.com | 25fb21f | 2011-06-21 18:17:25 +0000 | [diff] [blame] | 410 | * Pushes and resets the vertex/index sources. Any reserved vertex / index |
| 411 | * data is finalized (i.e. cannot be updated after the matching pop but can |
| 412 | * be drawn from). Must be balanced by a pop. |
| 413 | */ |
| 414 | void pushGeometrySource(); |
| 415 | |
| 416 | /** |
| 417 | * Pops the vertex / index sources from the matching push. |
| 418 | */ |
| 419 | void popGeometrySource(); |
bsalomon@google.com | 64aef2b | 2012-06-11 15:36:13 +0000 | [diff] [blame] | 420 | |
bsalomon@google.com | 25fb21f | 2011-06-21 18:17:25 +0000 | [diff] [blame] | 421 | /** |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 422 | * Draws indexed geometry using the current state and current vertex / index |
| 423 | * sources. |
| 424 | * |
| 425 | * @param type The type of primitives to draw. |
| 426 | * @param startVertex the vertex in the vertex array/buffer corresponding |
| 427 | * to index 0 |
| 428 | * @param startIndex first index to read from index src. |
| 429 | * @param vertexCount one greater than the max index. |
| 430 | * @param indexCount the number of index elements to read. The index count |
| 431 | * is effectively trimmed to the last completely |
| 432 | * specified primitive. |
| 433 | */ |
bsalomon@google.com | 25fb21f | 2011-06-21 18:17:25 +0000 | [diff] [blame] | 434 | void drawIndexed(GrPrimitiveType type, |
| 435 | int startVertex, |
| 436 | int startIndex, |
| 437 | int vertexCount, |
| 438 | int indexCount); |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 439 | |
| 440 | /** |
| 441 | * Draws non-indexed geometry using the current state and current vertex |
| 442 | * sources. |
| 443 | * |
| 444 | * @param type The type of primitives to draw. |
| 445 | * @param startVertex the vertex in the vertex array/buffer corresponding |
| 446 | * to index 0 |
| 447 | * @param vertexCount one greater than the max index. |
| 448 | */ |
bsalomon@google.com | 25fb21f | 2011-06-21 18:17:25 +0000 | [diff] [blame] | 449 | void drawNonIndexed(GrPrimitiveType type, |
| 450 | int startVertex, |
| 451 | int vertexCount); |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 452 | |
bsalomon@google.com | 86afc2a | 2011-02-16 16:12:19 +0000 | [diff] [blame] | 453 | /** |
bsalomon@google.com | 64aef2b | 2012-06-11 15:36:13 +0000 | [diff] [blame] | 454 | * Draws path into the stencil buffer. The fill must be either even/odd or |
| 455 | * winding (not inverse or hairline). It will respect the HW antialias flag |
| 456 | * on the draw state (if possible in the 3D API). |
| 457 | */ |
sugoi@google.com | 12b4e27 | 2012-12-06 20:13:11 +0000 | [diff] [blame^] | 458 | void stencilPath(const GrPath*, const SkStroke& stroke, SkPath::FillType fill); |
bsalomon@google.com | 64aef2b | 2012-06-11 15:36:13 +0000 | [diff] [blame] | 459 | |
| 460 | /** |
bsalomon@google.com | 86afc2a | 2011-02-16 16:12:19 +0000 | [diff] [blame] | 461 | * Helper function for drawing rects. This does not use the current index |
| 462 | * and vertex sources. After returning, the vertex and index sources may |
| 463 | * have changed. They should be reestablished before the next drawIndexed |
| 464 | * or drawNonIndexed. This cannot be called between reserving and releasing |
| 465 | * geometry. The GrDrawTarget subclass may be able to perform additional |
bsalomon@google.com | d302f14 | 2011-03-03 13:54:13 +0000 | [diff] [blame] | 466 | * optimizations if drawRect is used rather than drawIndexed or |
bsalomon@google.com | 86afc2a | 2011-02-16 16:12:19 +0000 | [diff] [blame] | 467 | * drawNonIndexed. |
| 468 | * @param rect the rect to draw |
| 469 | * @param matrix optional matrix applied to rect (before viewMatrix) |
bsalomon@google.com | 86afc2a | 2011-02-16 16:12:19 +0000 | [diff] [blame] | 470 | * @param srcRects specifies rects for stages enabled by stageEnableMask. |
| 471 | * if stageEnableMask bit i is 1, srcRects is not NULL, |
| 472 | * and srcRects[i] is not NULL, then srcRects[i] will be |
| 473 | * used as coordinates for stage i. Otherwise, if stage i |
| 474 | * is enabled then rect is used as the coordinates. |
| 475 | * @param srcMatrices optional matrices applied to srcRects. If |
| 476 | * srcRect[i] is non-NULL and srcMatrices[i] is |
| 477 | * non-NULL then srcRect[i] will be transformed by |
| 478 | * srcMatrix[i]. srcMatrices can be NULL when no |
| 479 | * srcMatrices are desired. |
| 480 | */ |
bsalomon@google.com | d302f14 | 2011-03-03 13:54:13 +0000 | [diff] [blame] | 481 | virtual void drawRect(const GrRect& rect, |
bsalomon@google.com | b9086a0 | 2012-11-01 18:02:54 +0000 | [diff] [blame] | 482 | const SkMatrix* matrix, |
bsalomon@google.com | 86afc2a | 2011-02-16 16:12:19 +0000 | [diff] [blame] | 483 | const GrRect* srcRects[], |
bsalomon@google.com | b9086a0 | 2012-11-01 18:02:54 +0000 | [diff] [blame] | 484 | const SkMatrix* srcMatrices[]); |
bsalomon@google.com | 86afc2a | 2011-02-16 16:12:19 +0000 | [diff] [blame] | 485 | |
| 486 | /** |
bsalomon@google.com | 934c570 | 2012-03-20 21:17:58 +0000 | [diff] [blame] | 487 | * This call is used to draw multiple instances of some geometry with a |
| 488 | * given number of vertices (V) and indices (I) per-instance. The indices in |
| 489 | * the index source must have the form i[k+I] == i[k] + V. Also, all indices |
| 490 | * i[kI] ... i[(k+1)I-1] must be elements of the range kV ... (k+1)V-1. As a |
| 491 | * concrete example, the following index buffer for drawing a series of |
| 492 | * quads each as two triangles each satisfies these conditions with V=4 and |
| 493 | * I=6: |
| 494 | * (0,1,2,0,2,3, 4,5,6,4,6,7, 8,9,10,8,10,11, ...) |
| 495 | * |
| 496 | * The call assumes that the pattern of indices fills the entire index |
| 497 | * source. The size of the index buffer limits the number of instances that |
| 498 | * can be drawn by the GPU in a single draw. However, the caller may specify |
| 499 | * any (positive) number for instanceCount and if necessary multiple GPU |
| 500 | * draws will be issued. Morever, when drawIndexedInstances is called |
| 501 | * multiple times it may be possible for GrDrawTarget to group them into a |
| 502 | * single GPU draw. |
| 503 | * |
| 504 | * @param type the type of primitives to draw |
| 505 | * @param instanceCount the number of instances to draw. Each instance |
| 506 | * consists of verticesPerInstance vertices indexed by |
| 507 | * indicesPerInstance indices drawn as the primitive |
| 508 | * type specified by type. |
| 509 | * @param verticesPerInstance The number of vertices in each instance (V |
| 510 | * in the above description). |
| 511 | * @param indicesPerInstance The number of indices in each instance (I |
| 512 | * in the above description). |
| 513 | */ |
| 514 | virtual void drawIndexedInstances(GrPrimitiveType type, |
| 515 | int instanceCount, |
| 516 | int verticesPerInstance, |
| 517 | int indicesPerInstance); |
| 518 | |
| 519 | /** |
bsalomon@google.com | d302f14 | 2011-03-03 13:54:13 +0000 | [diff] [blame] | 520 | * Helper for drawRect when the caller doesn't need separate src rects or |
bsalomon@google.com | 86afc2a | 2011-02-16 16:12:19 +0000 | [diff] [blame] | 521 | * matrices. |
| 522 | */ |
bsalomon@google.com | d302f14 | 2011-03-03 13:54:13 +0000 | [diff] [blame] | 523 | void drawSimpleRect(const GrRect& rect, |
bsalomon@google.com | b9086a0 | 2012-11-01 18:02:54 +0000 | [diff] [blame] | 524 | const SkMatrix* matrix) { |
bsalomon@google.com | e3d3216 | 2012-07-20 13:37:06 +0000 | [diff] [blame] | 525 | drawRect(rect, matrix, NULL, NULL); |
bsalomon@google.com | 86afc2a | 2011-02-16 16:12:19 +0000 | [diff] [blame] | 526 | } |
| 527 | |
bsalomon@google.com | 0b335c1 | 2011-04-25 19:17:44 +0000 | [diff] [blame] | 528 | /** |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 529 | * Clear the current render target if one isn't passed in. Ignores the |
| 530 | * clip and all other draw state (blend mode, stages, etc). Clears the |
robertphillips@google.com | c82a8b7 | 2012-06-21 20:15:48 +0000 | [diff] [blame] | 531 | * whole thing if rect is NULL, otherwise just the rect. |
bsalomon@google.com | 0b335c1 | 2011-04-25 19:17:44 +0000 | [diff] [blame] | 532 | */ |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 533 | virtual void clear(const GrIRect* rect, |
robertphillips@google.com | c82a8b7 | 2012-06-21 20:15:48 +0000 | [diff] [blame] | 534 | GrColor color, |
| 535 | GrRenderTarget* renderTarget = NULL) = 0; |
bsalomon@google.com | 0b335c1 | 2011-04-25 19:17:44 +0000 | [diff] [blame] | 536 | |
robertphillips@google.com | ff17584 | 2012-05-14 19:31:39 +0000 | [diff] [blame] | 537 | /** |
| 538 | * Release any resources that are cached but not currently in use. This |
| 539 | * is intended to give an application some recourse when resources are low. |
| 540 | */ |
| 541 | virtual void purgeResources() {}; |
| 542 | |
bsalomon@google.com | 25fb21f | 2011-06-21 18:17:25 +0000 | [diff] [blame] | 543 | //////////////////////////////////////////////////////////////////////////// |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 544 | |
bsalomon@google.com | 873ea0c | 2012-03-30 15:55:32 +0000 | [diff] [blame] | 545 | /** |
| 546 | * See AutoStateRestore below. |
| 547 | */ |
| 548 | enum ASRInit { |
| 549 | kPreserve_ASRInit, |
| 550 | kReset_ASRInit |
| 551 | }; |
| 552 | |
| 553 | /** |
| 554 | * Saves off the current state and restores it in the destructor. It will |
| 555 | * install a new GrDrawState object on the target (setDrawState) and restore |
| 556 | * the previous one in the destructor. The caller should call drawState() to |
| 557 | * get the new draw state after the ASR is installed. |
| 558 | * |
| 559 | * GrDrawState* state = target->drawState(); |
| 560 | * AutoStateRestore asr(target, GrDrawTarget::kReset_ASRInit). |
| 561 | * state->setRenderTarget(rt); // state refers to the GrDrawState set on |
| 562 | * // target before asr was initialized. |
| 563 | * // Therefore, rt is set on the GrDrawState |
| 564 | * // that will be restored after asr's |
| 565 | * // destructor rather than target's current |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 566 | * // GrDrawState. |
bsalomon@google.com | 873ea0c | 2012-03-30 15:55:32 +0000 | [diff] [blame] | 567 | */ |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 568 | class AutoStateRestore : ::GrNoncopyable { |
| 569 | public: |
bsalomon@google.com | 873ea0c | 2012-03-30 15:55:32 +0000 | [diff] [blame] | 570 | /** |
| 571 | * Default ASR will have no effect unless set() is subsequently called. |
| 572 | */ |
bsalomon@google.com | 06afe7b | 2011-04-26 15:31:40 +0000 | [diff] [blame] | 573 | AutoStateRestore(); |
bsalomon@google.com | 873ea0c | 2012-03-30 15:55:32 +0000 | [diff] [blame] | 574 | |
| 575 | /** |
| 576 | * Saves the state on target. The state will be restored when the ASR |
| 577 | * is destroyed. If this constructor is used do not call set(). |
| 578 | * |
| 579 | * @param init Should the newly installed GrDrawState be a copy of the |
| 580 | * previous state or a default-initialized GrDrawState. |
| 581 | */ |
| 582 | AutoStateRestore(GrDrawTarget* target, ASRInit init); |
| 583 | |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 584 | ~AutoStateRestore(); |
| 585 | |
bsalomon@google.com | 06afe7b | 2011-04-26 15:31:40 +0000 | [diff] [blame] | 586 | /** |
bsalomon@google.com | 873ea0c | 2012-03-30 15:55:32 +0000 | [diff] [blame] | 587 | * Saves the state on target. The state will be restored when the ASR |
| 588 | * is destroyed. This should only be called once per ASR object and only |
| 589 | * when the default constructor was used. For nested saves use multiple |
| 590 | * ASR objects. |
| 591 | * |
| 592 | * @param init Should the newly installed GrDrawState be a copy of the |
| 593 | * previous state or a default-initialized GrDrawState. |
bsalomon@google.com | 06afe7b | 2011-04-26 15:31:40 +0000 | [diff] [blame] | 594 | */ |
bsalomon@google.com | 873ea0c | 2012-03-30 15:55:32 +0000 | [diff] [blame] | 595 | void set(GrDrawTarget* target, ASRInit init); |
bsalomon@google.com | 06afe7b | 2011-04-26 15:31:40 +0000 | [diff] [blame] | 596 | |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 597 | private: |
bsalomon@google.com | 873ea0c | 2012-03-30 15:55:32 +0000 | [diff] [blame] | 598 | GrDrawTarget* fDrawTarget; |
| 599 | SkTLazy<GrDrawState> fTempState; |
| 600 | GrDrawState* fSavedState; |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 601 | }; |
| 602 | |
bsalomon@google.com | 25fb21f | 2011-06-21 18:17:25 +0000 | [diff] [blame] | 603 | //////////////////////////////////////////////////////////////////////////// |
bsalomon@google.com | 1c13c96 | 2011-02-14 16:51:21 +0000 | [diff] [blame] | 604 | |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 605 | class AutoReleaseGeometry : ::GrNoncopyable { |
| 606 | public: |
| 607 | AutoReleaseGeometry(GrDrawTarget* target, |
| 608 | GrVertexLayout vertexLayout, |
bsalomon@google.com | 25fb21f | 2011-06-21 18:17:25 +0000 | [diff] [blame] | 609 | int vertexCount, |
| 610 | int indexCount); |
| 611 | AutoReleaseGeometry(); |
| 612 | ~AutoReleaseGeometry(); |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame] | 613 | bool set(GrDrawTarget* target, |
| 614 | GrVertexLayout vertexLayout, |
bsalomon@google.com | 25fb21f | 2011-06-21 18:17:25 +0000 | [diff] [blame] | 615 | int vertexCount, |
| 616 | int indexCount); |
bsalomon@google.com | a47a48d | 2011-04-26 20:22:11 +0000 | [diff] [blame] | 617 | bool succeeded() const { return NULL != fTarget; } |
bsalomon@google.com | 6513cd0 | 2011-08-05 20:12:30 +0000 | [diff] [blame] | 618 | void* vertices() const { GrAssert(this->succeeded()); return fVertices; } |
| 619 | void* indices() const { GrAssert(this->succeeded()); return fIndices; } |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 620 | GrPoint* positions() const { |
bsalomon@google.com | 6513cd0 | 2011-08-05 20:12:30 +0000 | [diff] [blame] | 621 | return static_cast<GrPoint*>(this->vertices()); |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 622 | } |
| 623 | |
| 624 | private: |
bsalomon@google.com | 25fb21f | 2011-06-21 18:17:25 +0000 | [diff] [blame] | 625 | void reset(); |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 626 | |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 627 | GrDrawTarget* fTarget; |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 628 | void* fVertices; |
| 629 | void* fIndices; |
| 630 | }; |
| 631 | |
bsalomon@google.com | 25fb21f | 2011-06-21 18:17:25 +0000 | [diff] [blame] | 632 | //////////////////////////////////////////////////////////////////////////// |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 633 | |
| 634 | class AutoClipRestore : ::GrNoncopyable { |
| 635 | public: |
| 636 | AutoClipRestore(GrDrawTarget* target) { |
| 637 | fTarget = target; |
| 638 | fClip = fTarget->getClip(); |
| 639 | } |
| 640 | |
| 641 | ~AutoClipRestore() { |
| 642 | fTarget->setClip(fClip); |
| 643 | } |
| 644 | private: |
robertphillips@google.com | beb1af7 | 2012-07-26 18:52:16 +0000 | [diff] [blame] | 645 | GrDrawTarget* fTarget; |
| 646 | const GrClipData* fClip; |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 647 | }; |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 648 | |
bsalomon@google.com | 25fb21f | 2011-06-21 18:17:25 +0000 | [diff] [blame] | 649 | //////////////////////////////////////////////////////////////////////////// |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 650 | |
bsalomon@google.com | 25fb21f | 2011-06-21 18:17:25 +0000 | [diff] [blame] | 651 | class AutoGeometryPush : ::GrNoncopyable { |
| 652 | public: |
| 653 | AutoGeometryPush(GrDrawTarget* target) { |
| 654 | GrAssert(NULL != target); |
| 655 | fTarget = target; |
| 656 | target->pushGeometrySource(); |
| 657 | } |
| 658 | ~AutoGeometryPush() { |
| 659 | fTarget->popGeometrySource(); |
| 660 | } |
| 661 | private: |
| 662 | GrDrawTarget* fTarget; |
| 663 | }; |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 664 | |
| 665 | //////////////////////////////////////////////////////////////////////////// |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 666 | // Helpers for picking apart vertex layouts |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame] | 667 | |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 668 | /** |
| 669 | * Helper function to compute the size of a vertex from a vertex layout |
| 670 | * @return size of a single vertex. |
| 671 | */ |
| 672 | static size_t VertexSize(GrVertexLayout vertexLayout); |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame] | 673 | |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 674 | /** |
| 675 | * Helper function for determining the index of texture coordinates that |
| 676 | * is input for a texture stage. Note that a stage may instead use positions |
| 677 | * as texture coordinates, in which case the result of the function is |
| 678 | * indistinguishable from the case when the stage is disabled. |
| 679 | * |
bsalomon@google.com | 08283af | 2012-10-26 13:01:20 +0000 | [diff] [blame] | 680 | * @param stageIdx the stage to query |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 681 | * @param vertexLayout layout to query |
| 682 | * |
| 683 | * @return the texture coordinate index or -1 if the stage doesn't use |
| 684 | * separate (non-position) texture coordinates. |
| 685 | */ |
bsalomon@google.com | 08283af | 2012-10-26 13:01:20 +0000 | [diff] [blame] | 686 | static int VertexTexCoordsForStage(int stageIdx, GrVertexLayout vertexLayout); |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 687 | |
| 688 | /** |
| 689 | * Helper function to compute the offset of texture coordinates in a vertex |
| 690 | * @return offset of texture coordinates in vertex layout or -1 if the |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame] | 691 | * layout has no texture coordinates. Will be 0 if positions are |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 692 | * used as texture coordinates for the stage. |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 693 | */ |
bsalomon@google.com | 08283af | 2012-10-26 13:01:20 +0000 | [diff] [blame] | 694 | static int VertexStageCoordOffset(int stageIdx, GrVertexLayout vertexLayout); |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 695 | |
| 696 | /** |
| 697 | * Helper function to compute the offset of the color in a vertex |
| 698 | * @return offset of color in vertex layout or -1 if the |
| 699 | * layout has no color. |
| 700 | */ |
| 701 | static int VertexColorOffset(GrVertexLayout vertexLayout); |
| 702 | |
bsalomon@google.com | a310826 | 2011-10-10 14:08:47 +0000 | [diff] [blame] | 703 | /** |
| 704 | * Helper function to compute the offset of the coverage in a vertex |
| 705 | * @return offset of coverage in vertex layout or -1 if the |
| 706 | * layout has no coverage. |
| 707 | */ |
| 708 | static int VertexCoverageOffset(GrVertexLayout vertexLayout); |
| 709 | |
bsalomon@google.com | aeb2160 | 2011-08-30 18:13:44 +0000 | [diff] [blame] | 710 | /** |
| 711 | * Helper function to compute the offset of the edge pts in a vertex |
| 712 | * @return offset of edge in vertex layout or -1 if the |
| 713 | * layout has no edge. |
| 714 | */ |
| 715 | static int VertexEdgeOffset(GrVertexLayout vertexLayout); |
| 716 | |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 717 | /** |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame] | 718 | * Helper function to determine if vertex layout contains explicit texture |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 719 | * coordinates of some index. |
| 720 | * |
| 721 | * @param coordIndex the tex coord index to query |
| 722 | * @param vertexLayout layout to query |
| 723 | * |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame] | 724 | * @return true if vertex specifies texture coordinates for the index, |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 725 | * false otherwise. |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 726 | */ |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame] | 727 | static bool VertexUsesTexCoordIdx(int coordIndex, |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 728 | GrVertexLayout vertexLayout); |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame] | 729 | |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 730 | /** |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame] | 731 | * Helper function to compute the size of each vertex and the offsets of |
| 732 | * texture coordinates and color. Determines tex coord offsets by tex coord |
| 733 | * index rather than by stage. (Each stage can be mapped to any t.c. index |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 734 | * by StageTexCoordVertexLayoutBit.) |
| 735 | * |
| 736 | * @param vertexLayout the layout to query |
| 737 | * @param texCoordOffsetsByIdx after return it is the offset of each |
| 738 | * tex coord index in the vertex or -1 if |
bsalomon@google.com | a310826 | 2011-10-10 14:08:47 +0000 | [diff] [blame] | 739 | * index isn't used. (optional) |
| 740 | * @param colorOffset after return it is the offset of the |
| 741 | * color field in each vertex, or -1 if |
| 742 | * there aren't per-vertex colors. (optional) |
| 743 | * @param coverageOffset after return it is the offset of the |
| 744 | * coverage field in each vertex, or -1 if |
| 745 | * there aren't per-vertex coeverages. |
| 746 | * (optional) |
| 747 | * @param edgeOffset after return it is the offset of the |
| 748 | * edge eq field in each vertex, or -1 if |
| 749 | * there aren't per-vertex edge equations. |
| 750 | * (optional) |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 751 | * @return size of a single vertex |
| 752 | */ |
| 753 | static int VertexSizeAndOffsetsByIdx(GrVertexLayout vertexLayout, |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 754 | int texCoordOffsetsByIdx[GrDrawState::kMaxTexCoords], |
| 755 | int *colorOffset, |
| 756 | int *coverageOffset, |
| 757 | int* edgeOffset); |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame] | 758 | |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 759 | /** |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame] | 760 | * Helper function to compute the size of each vertex and the offsets of |
| 761 | * texture coordinates and color. Determines tex coord offsets by stage |
| 762 | * rather than by index. (Each stage can be mapped to any t.c. index |
| 763 | * by StageTexCoordVertexLayoutBit.) If a stage uses positions for |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 764 | * tex coords then that stage's offset will be 0 (positions are always at 0). |
| 765 | * |
| 766 | * @param vertexLayout the layout to query |
| 767 | * @param texCoordOffsetsByStage after return it is the offset of each |
| 768 | * tex coord index in the vertex or -1 if |
bsalomon@google.com | a310826 | 2011-10-10 14:08:47 +0000 | [diff] [blame] | 769 | * index isn't used. (optional) |
| 770 | * @param colorOffset after return it is the offset of the |
| 771 | * color field in each vertex, or -1 if |
| 772 | * there aren't per-vertex colors. |
| 773 | * (optional) |
| 774 | * @param coverageOffset after return it is the offset of the |
| 775 | * coverage field in each vertex, or -1 if |
| 776 | * there aren't per-vertex coeverages. |
| 777 | * (optional) |
| 778 | * @param edgeOffset after return it is the offset of the |
| 779 | * edge eq field in each vertex, or -1 if |
| 780 | * there aren't per-vertex edge equations. |
| 781 | * (optional) |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 782 | * @return size of a single vertex |
| 783 | */ |
| 784 | static int VertexSizeAndOffsetsByStage(GrVertexLayout vertexLayout, |
tomhudson@google.com | 9381363 | 2011-10-27 20:21:16 +0000 | [diff] [blame] | 785 | int texCoordOffsetsByStage[GrDrawState::kNumStages], |
| 786 | int* colorOffset, |
| 787 | int* coverageOffset, |
| 788 | int* edgeOffset); |
bsalomon@google.com | 86afc2a | 2011-02-16 16:12:19 +0000 | [diff] [blame] | 789 | |
| 790 | /** |
| 791 | * Accessing positions, texture coords, or colors, of a vertex within an |
| 792 | * array is a hassle involving casts and simple math. These helpers exist |
| 793 | * to keep GrDrawTarget clients' code a bit nicer looking. |
| 794 | */ |
| 795 | |
| 796 | /** |
| 797 | * Gets a pointer to a GrPoint of a vertex's position or texture |
| 798 | * coordinate. |
| 799 | * @param vertices the vetex array |
| 800 | * @param vertexIndex the index of the vertex in the array |
| 801 | * @param vertexSize the size of each vertex in the array |
| 802 | * @param offset the offset in bytes of the vertex component. |
| 803 | * Defaults to zero (corresponding to vertex position) |
| 804 | * @return pointer to the vertex component as a GrPoint |
| 805 | */ |
bsalomon@google.com | d302f14 | 2011-03-03 13:54:13 +0000 | [diff] [blame] | 806 | static GrPoint* GetVertexPoint(void* vertices, |
bsalomon@google.com | 86afc2a | 2011-02-16 16:12:19 +0000 | [diff] [blame] | 807 | int vertexIndex, |
| 808 | int vertexSize, |
| 809 | int offset = 0) { |
| 810 | intptr_t start = GrTCast<intptr_t>(vertices); |
bsalomon@google.com | d302f14 | 2011-03-03 13:54:13 +0000 | [diff] [blame] | 811 | return GrTCast<GrPoint*>(start + offset + |
bsalomon@google.com | 86afc2a | 2011-02-16 16:12:19 +0000 | [diff] [blame] | 812 | vertexIndex * vertexSize); |
| 813 | } |
| 814 | static const GrPoint* GetVertexPoint(const void* vertices, |
| 815 | int vertexIndex, |
bsalomon@google.com | d302f14 | 2011-03-03 13:54:13 +0000 | [diff] [blame] | 816 | int vertexSize, |
bsalomon@google.com | 86afc2a | 2011-02-16 16:12:19 +0000 | [diff] [blame] | 817 | int offset = 0) { |
| 818 | intptr_t start = GrTCast<intptr_t>(vertices); |
bsalomon@google.com | d302f14 | 2011-03-03 13:54:13 +0000 | [diff] [blame] | 819 | return GrTCast<const GrPoint*>(start + offset + |
bsalomon@google.com | 86afc2a | 2011-02-16 16:12:19 +0000 | [diff] [blame] | 820 | vertexIndex * vertexSize); |
| 821 | } |
| 822 | |
| 823 | /** |
| 824 | * Gets a pointer to a GrColor inside a vertex within a vertex array. |
| 825 | * @param vertices the vetex array |
| 826 | * @param vertexIndex the index of the vertex in the array |
| 827 | * @param vertexSize the size of each vertex in the array |
| 828 | * @param offset the offset in bytes of the vertex color |
| 829 | * @return pointer to the vertex component as a GrColor |
| 830 | */ |
bsalomon@google.com | d302f14 | 2011-03-03 13:54:13 +0000 | [diff] [blame] | 831 | static GrColor* GetVertexColor(void* vertices, |
bsalomon@google.com | 86afc2a | 2011-02-16 16:12:19 +0000 | [diff] [blame] | 832 | int vertexIndex, |
| 833 | int vertexSize, |
| 834 | int offset) { |
| 835 | intptr_t start = GrTCast<intptr_t>(vertices); |
bsalomon@google.com | d302f14 | 2011-03-03 13:54:13 +0000 | [diff] [blame] | 836 | return GrTCast<GrColor*>(start + offset + |
bsalomon@google.com | 86afc2a | 2011-02-16 16:12:19 +0000 | [diff] [blame] | 837 | vertexIndex * vertexSize); |
| 838 | } |
| 839 | static const GrColor* GetVertexColor(const void* vertices, |
| 840 | int vertexIndex, |
bsalomon@google.com | d302f14 | 2011-03-03 13:54:13 +0000 | [diff] [blame] | 841 | int vertexSize, |
bsalomon@google.com | 86afc2a | 2011-02-16 16:12:19 +0000 | [diff] [blame] | 842 | int offset) { |
| 843 | const intptr_t start = GrTCast<intptr_t>(vertices); |
bsalomon@google.com | d302f14 | 2011-03-03 13:54:13 +0000 | [diff] [blame] | 844 | return GrTCast<const GrColor*>(start + offset + |
bsalomon@google.com | 86afc2a | 2011-02-16 16:12:19 +0000 | [diff] [blame] | 845 | vertexIndex * vertexSize); |
| 846 | } |
| 847 | |
bsalomon@google.com | 5aaa69e | 2011-03-04 20:29:08 +0000 | [diff] [blame] | 848 | static void VertexLayoutUnitTest(); |
| 849 | |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 850 | protected: |
bsalomon@google.com | 471d471 | 2011-08-23 15:45:25 +0000 | [diff] [blame] | 851 | |
bsalomon@google.com | 86c1f71 | 2011-10-12 14:54:26 +0000 | [diff] [blame] | 852 | /** |
| 853 | * Optimizations for blending / coverage to be applied based on the current |
| 854 | * state. |
| 855 | * Subclasses that actually draw (as opposed to those that just buffer for |
| 856 | * playback) must implement the flags that replace the output color. |
| 857 | */ |
| 858 | enum BlendOptFlags { |
| 859 | /** |
| 860 | * No optimization |
| 861 | */ |
| 862 | kNone_BlendOpt = 0, |
| 863 | /** |
| 864 | * Don't draw at all |
| 865 | */ |
| 866 | kSkipDraw_BlendOptFlag = 0x2, |
| 867 | /** |
| 868 | * Emit the src color, disable HW blending (replace dst with src) |
| 869 | */ |
| 870 | kDisableBlend_BlendOptFlag = 0x4, |
| 871 | /** |
| 872 | * The coverage value does not have to be computed separately from |
| 873 | * alpha, the the output color can be the modulation of the two. |
| 874 | */ |
| 875 | kCoverageAsAlpha_BlendOptFlag = 0x1, |
| 876 | /** |
| 877 | * Instead of emitting a src color, emit coverage in the alpha channel |
| 878 | * and r,g,b are "don't cares". |
| 879 | */ |
| 880 | kEmitCoverage_BlendOptFlag = 0x10, |
| 881 | /** |
| 882 | * Emit transparent black instead of the src color, no need to compute |
| 883 | * coverage. |
| 884 | */ |
| 885 | kEmitTransBlack_BlendOptFlag = 0x8, |
| 886 | }; |
| 887 | GR_DECL_BITFIELD_OPS_FRIENDS(BlendOptFlags); |
bsalomon@google.com | 471d471 | 2011-08-23 15:45:25 +0000 | [diff] [blame] | 888 | |
bsalomon@google.com | 86c1f71 | 2011-10-12 14:54:26 +0000 | [diff] [blame] | 889 | // Determines what optimizations can be applied based on the blend. |
| 890 | // The coeffecients may have to be tweaked in order for the optimization |
| 891 | // to work. srcCoeff and dstCoeff are optional params that receive the |
| 892 | // tweaked coeffecients. |
| 893 | // Normally the function looks at the current state to see if coverage |
| 894 | // is enabled. By setting forceCoverage the caller can speculatively |
| 895 | // determine the blend optimizations that would be used if there was |
| 896 | // partial pixel coverage |
| 897 | BlendOptFlags getBlendOpts(bool forceCoverage = false, |
| 898 | GrBlendCoeff* srcCoeff = NULL, |
| 899 | GrBlendCoeff* dstCoeff = NULL) const; |
| 900 | |
| 901 | // determine if src alpha is guaranteed to be one for all src pixels |
bsalomon@google.com | e79c815 | 2012-03-29 19:07:12 +0000 | [diff] [blame] | 902 | bool srcAlphaWillBeOne(GrVertexLayout vertexLayout) const; |
bsalomon@google.com | 471d471 | 2011-08-23 15:45:25 +0000 | [diff] [blame] | 903 | |
bsalomon@google.com | 25fb21f | 2011-06-21 18:17:25 +0000 | [diff] [blame] | 904 | enum GeometrySrcType { |
| 905 | kNone_GeometrySrcType, //<! src has not been specified |
| 906 | kReserved_GeometrySrcType, //<! src was set using reserve*Space |
| 907 | kArray_GeometrySrcType, //<! src was set using set*SourceToArray |
| 908 | kBuffer_GeometrySrcType //<! src was set using set*SourceToBuffer |
| 909 | }; |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 910 | |
bsalomon@google.com | 25fb21f | 2011-06-21 18:17:25 +0000 | [diff] [blame] | 911 | struct GeometrySrcState { |
| 912 | GeometrySrcType fVertexSrc; |
| 913 | union { |
| 914 | // valid if src type is buffer |
| 915 | const GrVertexBuffer* fVertexBuffer; |
| 916 | // valid if src type is reserved or array |
| 917 | int fVertexCount; |
| 918 | }; |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 919 | |
bsalomon@google.com | 25fb21f | 2011-06-21 18:17:25 +0000 | [diff] [blame] | 920 | GeometrySrcType fIndexSrc; |
| 921 | union { |
| 922 | // valid if src type is buffer |
| 923 | const GrIndexBuffer* fIndexBuffer; |
| 924 | // valid if src type is reserved or array |
| 925 | int fIndexCount; |
| 926 | }; |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 927 | |
bsalomon@google.com | 25fb21f | 2011-06-21 18:17:25 +0000 | [diff] [blame] | 928 | GrVertexLayout fVertexLayout; |
| 929 | }; |
bsalomon@google.com | 934c570 | 2012-03-20 21:17:58 +0000 | [diff] [blame] | 930 | |
| 931 | int indexCountInCurrentSource() const { |
| 932 | const GeometrySrcState& src = this->getGeomSrc(); |
| 933 | switch (src.fIndexSrc) { |
| 934 | case kNone_GeometrySrcType: |
| 935 | return 0; |
| 936 | case kReserved_GeometrySrcType: |
| 937 | case kArray_GeometrySrcType: |
| 938 | return src.fIndexCount; |
| 939 | case kBuffer_GeometrySrcType: |
| 940 | return src.fIndexBuffer->sizeInBytes() / sizeof(uint16_t); |
| 941 | default: |
| 942 | GrCrash("Unexpected Index Source."); |
| 943 | return 0; |
| 944 | } |
| 945 | } |
bsalomon@google.com | a47a48d | 2011-04-26 20:22:11 +0000 | [diff] [blame] | 946 | |
bsalomon@google.com | 08283af | 2012-10-26 13:01:20 +0000 | [diff] [blame] | 947 | bool isStageEnabled(int stageIdx) const { |
| 948 | return this->getDrawState().isStageEnabled(stageIdx); |
bsalomon@google.com | a47a48d | 2011-04-26 20:22:11 +0000 | [diff] [blame] | 949 | } |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame] | 950 | |
bsalomon@google.com | 9780538 | 2012-03-13 14:32:07 +0000 | [diff] [blame] | 951 | // A sublcass can optionally overload this function to be notified before |
| 952 | // vertex and index space is reserved. |
| 953 | virtual void willReserveVertexAndIndexSpace(GrVertexLayout vertexLayout, |
| 954 | int vertexCount, |
| 955 | int indexCount) {} |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 956 | |
bsalomon@google.com | 9780538 | 2012-03-13 14:32:07 +0000 | [diff] [blame] | 957 | |
bsalomon@google.com | 25fb21f | 2011-06-21 18:17:25 +0000 | [diff] [blame] | 958 | // implemented by subclass to allocate space for reserved geom |
| 959 | virtual bool onReserveVertexSpace(GrVertexLayout vertexLayout, |
| 960 | int vertexCount, |
| 961 | void** vertices) = 0; |
| 962 | virtual bool onReserveIndexSpace(int indexCount, void** indices) = 0; |
| 963 | // implemented by subclass to handle release of reserved geom space |
| 964 | virtual void releaseReservedVertexSpace() = 0; |
| 965 | virtual void releaseReservedIndexSpace() = 0; |
| 966 | // subclass must consume array contents when set |
| 967 | virtual void onSetVertexSourceToArray(const void* vertexArray, |
| 968 | int vertexCount) = 0; |
| 969 | virtual void onSetIndexSourceToArray(const void* indexArray, |
| 970 | int indexCount) = 0; |
| 971 | // subclass is notified that geom source will be set away from an array |
| 972 | virtual void releaseVertexArray() = 0; |
| 973 | virtual void releaseIndexArray() = 0; |
| 974 | // subclass overrides to be notified just before geo src state |
| 975 | // is pushed/popped. |
| 976 | virtual void geometrySourceWillPush() = 0; |
| 977 | virtual void geometrySourceWillPop(const GeometrySrcState& restoredState) = 0; |
| 978 | // subclass called to perform drawing |
| 979 | virtual void onDrawIndexed(GrPrimitiveType type, |
| 980 | int startVertex, |
| 981 | int startIndex, |
| 982 | int vertexCount, |
| 983 | int indexCount) = 0; |
| 984 | virtual void onDrawNonIndexed(GrPrimitiveType type, |
| 985 | int startVertex, |
| 986 | int vertexCount) = 0; |
sugoi@google.com | 12b4e27 | 2012-12-06 20:13:11 +0000 | [diff] [blame^] | 987 | virtual void onStencilPath(const GrPath*, const SkStroke& stroke, SkPath::FillType fill) = 0; |
bsalomon@google.com | 64aef2b | 2012-06-11 15:36:13 +0000 | [diff] [blame] | 988 | |
bsalomon@google.com | dea2f8d | 2011-08-01 15:51:05 +0000 | [diff] [blame] | 989 | // subclass overrides to be notified when clip is set. Must call |
| 990 | // INHERITED::clipwillBeSet |
robertphillips@google.com | beb1af7 | 2012-07-26 18:52:16 +0000 | [diff] [blame] | 991 | virtual void clipWillBeSet(const GrClipData* clipData) {} |
bsalomon@google.com | 1c13c96 | 2011-02-14 16:51:21 +0000 | [diff] [blame] | 992 | |
bsalomon@google.com | 86afc2a | 2011-02-16 16:12:19 +0000 | [diff] [blame] | 993 | // Helpers for drawRect, protected so subclasses that override drawRect |
| 994 | // can use them. |
bsalomon@google.com | e3d3216 | 2012-07-20 13:37:06 +0000 | [diff] [blame] | 995 | static GrVertexLayout GetRectVertexLayout(const GrRect* srcRects[]); |
bsalomon@google.com | 86afc2a | 2011-02-16 16:12:19 +0000 | [diff] [blame] | 996 | |
| 997 | static void SetRectVertices(const GrRect& rect, |
bsalomon@google.com | b9086a0 | 2012-11-01 18:02:54 +0000 | [diff] [blame] | 998 | const SkMatrix* matrix, |
bsalomon@google.com | d302f14 | 2011-03-03 13:54:13 +0000 | [diff] [blame] | 999 | const GrRect* srcRects[], |
bsalomon@google.com | b9086a0 | 2012-11-01 18:02:54 +0000 | [diff] [blame] | 1000 | const SkMatrix* srcMatrices[], |
robertphillips@google.com | 8b129aa | 2012-10-05 15:37:00 +0000 | [diff] [blame] | 1001 | GrColor color, |
bsalomon@google.com | d302f14 | 2011-03-03 13:54:13 +0000 | [diff] [blame] | 1002 | GrVertexLayout layout, |
bsalomon@google.com | 86afc2a | 2011-02-16 16:12:19 +0000 | [diff] [blame] | 1003 | void* vertices); |
| 1004 | |
bsalomon@google.com | e79c815 | 2012-03-29 19:07:12 +0000 | [diff] [blame] | 1005 | // accessors for derived classes |
bsalomon@google.com | 25fb21f | 2011-06-21 18:17:25 +0000 | [diff] [blame] | 1006 | const GeometrySrcState& getGeomSrc() const { |
| 1007 | return fGeoSrcStateStack.back(); |
| 1008 | } |
bsalomon@google.com | e79c815 | 2012-03-29 19:07:12 +0000 | [diff] [blame] | 1009 | // it is prefereable to call this rather than getGeomSrc()->fVertexLayout |
| 1010 | // because of the assert. |
| 1011 | GrVertexLayout getVertexLayout() const { |
| 1012 | // the vertex layout is only valid if a vertex source has been |
| 1013 | // specified. |
| 1014 | GrAssert(this->getGeomSrc().fVertexSrc != kNone_GeometrySrcType); |
| 1015 | return this->getGeomSrc().fVertexLayout; |
| 1016 | } |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 1017 | |
bsalomon@google.com | f660187 | 2012-08-28 21:11:35 +0000 | [diff] [blame] | 1018 | // allows derived class to set the caps |
| 1019 | CapsInternals* capsInternals() { return &fCaps.fInternals; } |
| 1020 | |
robertphillips@google.com | beb1af7 | 2012-07-26 18:52:16 +0000 | [diff] [blame] | 1021 | const GrClipData* fClip; |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 1022 | |
bsalomon@google.com | a5d056a | 2012-03-27 15:59:58 +0000 | [diff] [blame] | 1023 | GrDrawState* fDrawState; |
| 1024 | GrDrawState fDefaultDrawState; |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 1025 | |
bsalomon@google.com | 18c9c19 | 2011-09-22 21:01:31 +0000 | [diff] [blame] | 1026 | Caps fCaps; |
| 1027 | |
bsalomon@google.com | 4a018bb | 2011-10-28 19:50:21 +0000 | [diff] [blame] | 1028 | // subclasses must call this in their destructors to ensure all vertex |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 1029 | // and index sources have been released (including those held by |
bsalomon@google.com | 4a018bb | 2011-10-28 19:50:21 +0000 | [diff] [blame] | 1030 | // pushGeometrySource()) |
| 1031 | void releaseGeometry(); |
bsalomon@google.com | e3d7095 | 2012-03-13 12:40:53 +0000 | [diff] [blame] | 1032 | |
bsalomon@google.com | 25fb21f | 2011-06-21 18:17:25 +0000 | [diff] [blame] | 1033 | private: |
bsalomon@google.com | e3d7095 | 2012-03-13 12:40:53 +0000 | [diff] [blame] | 1034 | // helpers for reserving vertex and index space. |
| 1035 | bool reserveVertexSpace(GrVertexLayout vertexLayout, |
| 1036 | int vertexCount, |
| 1037 | void** vertices); |
| 1038 | bool reserveIndexSpace(int indexCount, void** indices); |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 1039 | |
bsalomon@google.com | e826262 | 2011-11-07 02:30:51 +0000 | [diff] [blame] | 1040 | // called by drawIndexed and drawNonIndexed. Use a negative indexCount to |
| 1041 | // indicate non-indexed drawing. |
| 1042 | bool checkDraw(GrPrimitiveType type, int startVertex, |
| 1043 | int startIndex, int vertexCount, |
| 1044 | int indexCount) const; |
bsalomon@google.com | 25fb21f | 2011-06-21 18:17:25 +0000 | [diff] [blame] | 1045 | // called when setting a new vert/idx source to unref prev vb/ib |
| 1046 | void releasePreviousVertexSource(); |
| 1047 | void releasePreviousIndexSource(); |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 1048 | |
bsalomon@google.com | 25fb21f | 2011-06-21 18:17:25 +0000 | [diff] [blame] | 1049 | enum { |
| 1050 | kPreallocGeoSrcStateStackCnt = 4, |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 1051 | }; |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 1052 | SkSTArray<kPreallocGeoSrcStateStackCnt, |
bsalomon@google.com | 9266901 | 2011-09-27 19:10:05 +0000 | [diff] [blame] | 1053 | GeometrySrcState, true> fGeoSrcStateStack; |
reed@google.com | fa35e3d | 2012-06-26 20:16:17 +0000 | [diff] [blame] | 1054 | |
| 1055 | typedef GrRefCnt INHERITED; |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 1056 | }; |
| 1057 | |
bsalomon@google.com | 86c1f71 | 2011-10-12 14:54:26 +0000 | [diff] [blame] | 1058 | GR_MAKE_BITFIELD_OPS(GrDrawTarget::BlendOptFlags); |
| 1059 | |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 1060 | #endif |