reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 1 | /* |
| 2 | Copyright 2010 Google Inc. |
| 3 | |
| 4 | Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | you may not use this file except in compliance with the License. |
| 6 | You may obtain a copy of the License at |
| 7 | |
| 8 | http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | |
| 10 | Unless required by applicable law or agreed to in writing, software |
| 11 | distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | See the License for the specific language governing permissions and |
| 14 | limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | |
| 18 | #ifndef GrDrawTarget_DEFINED |
| 19 | #define GrDrawTarget_DEFINED |
| 20 | |
| 21 | #include "GrScalar.h" |
| 22 | #include "GrMatrix.h" |
| 23 | #include "GrColor.h" |
| 24 | #include "GrRefCnt.h" |
| 25 | #include "GrSamplerState.h" |
| 26 | #include "GrClip.h" |
| 27 | |
| 28 | class GrTexture; |
| 29 | class GrRenderTarget; |
| 30 | class GrClipIterator; |
| 31 | class GrVertexBuffer; |
| 32 | class GrIndexBuffer; |
| 33 | |
| 34 | class GrDrawTarget : public GrRefCnt { |
| 35 | public: |
| 36 | /** |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 37 | * Number of texture stages. Each stage takes as input a color and |
| 38 | * 2D texture coordinates. The color input to the first enabled stage is the |
| 39 | * per-vertex color or the constant color (setColor/setAlpha) if there are |
| 40 | * no per-vertex colors. For subsequent stages the input color is the output |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 41 | * color from the previous enabled stage. The output color of each stage is |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 42 | * the input color modulated with the result of a texture lookup. Texture |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 43 | * lookups are specified by a texture (setTexture), a texture matrix |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 44 | * (setTextureMatrix), and a sampler (setSamplerState). Texture coordinates |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 45 | * for each stage come from the vertices based on a GrVertexLayout bitfield. |
| 46 | * The output fragment color is the output color of the last enabled stage. |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 47 | * The presence or absence of texture coordinates for each stage in the |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 48 | * vertex layout indicates whether a stage is enabled or not. |
| 49 | */ |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 50 | |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 51 | // Currently there is just one stage but this will be changed soon. |
| 52 | enum { |
| 53 | kNumStages = 1, |
| 54 | kMaxTexCoords = kNumStages |
| 55 | }; |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 56 | |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 57 | /** |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 58 | * Geometric primitives used for drawing. |
| 59 | */ |
| 60 | enum PrimitiveType { |
| 61 | kTriangles_PrimitiveType, |
| 62 | kTriangleStrip_PrimitiveType, |
| 63 | kTriangleFan_PrimitiveType, |
| 64 | kPoints_PrimitiveType, |
| 65 | kLines_PrimitiveType, |
| 66 | kLineStrip_PrimitiveType |
| 67 | }; |
| 68 | |
| 69 | /** |
| 70 | * Flags that affect rendering. Controlled using enable/disableState(). All |
| 71 | * default to disabled. |
| 72 | */ |
| 73 | enum StateBits { |
| 74 | kDither_StateBit = 0x1,//<! Perform color dithering |
| 75 | kAntialias_StateBit = 0x2,//<! Perform anti-aliasing. The render- |
| 76 | // target must support some form of AA |
| 77 | // (msaa, coverage sampling, etc). For |
| 78 | // GrGpu-created rendertarget/textures |
| 79 | // this is controlled by parameters |
| 80 | // passed to createTexture. |
| 81 | kClip_StateBit = 0x4,//<! Controls whether drawing is clipped |
| 82 | // against the region specified by |
| 83 | // setClip. |
| 84 | }; |
| 85 | |
| 86 | /** |
| 87 | * Coeffecients for alpha-blending. |
| 88 | */ |
| 89 | enum BlendCoeff { |
| 90 | kZero_BlendCoeff, //<! 0 |
| 91 | kOne_BlendCoeff, //<! 1 |
| 92 | kSC_BlendCoeff, //<! src color |
| 93 | kISC_BlendCoeff, //<! one minus src color |
| 94 | kDC_BlendCoeff, //<! dst color |
| 95 | kIDC_BlendCoeff, //<! one minus dst color |
| 96 | kSA_BlendCoeff, //<! src alpha |
| 97 | kISA_BlendCoeff, //<! one minus src alpha |
| 98 | kDA_BlendCoeff, //<! dst alpha |
| 99 | kIDA_BlendCoeff, //<! one minus dst alpha |
| 100 | }; |
| 101 | |
| 102 | /** |
| 103 | * StencilPass |
| 104 | * |
| 105 | * Sets the stencil state for subsequent draw calls. Used to fill paths. |
| 106 | * |
| 107 | * Winding requires two passes when the GPU/API doesn't support separate |
| 108 | * stencil. |
| 109 | * |
| 110 | * The color pass for path fill is used to zero out stencil bits used for |
| 111 | * path filling. Every pixel covere by a winding/EO stencil pass must get |
| 112 | * covered by the color pass in order to leave stencil buffer in the correct |
| 113 | * state for the next path draw. |
| 114 | * |
| 115 | * NOTE: Stencil-based Winding fill has alias-to-zero problems. (e.g. A |
| 116 | * winding count of 128,256,512,etc with a 8 bit stencil buffer |
| 117 | * will be unfilled) |
| 118 | */ |
| 119 | enum StencilPass { |
| 120 | kNone_StencilPass, //<! Not drawing a path or clip. |
| 121 | kEvenOddStencil_StencilPass, //<! records in/out in stencil buffer |
| 122 | // using the Even/Odd fill rule. |
| 123 | kEvenOddColor_StencilPass, //<! writes colors to color target in |
| 124 | // pixels marked inside the fill by |
| 125 | // kEOFillStencil_StencilPass. Clears |
| 126 | // stencil in pixels covered by |
| 127 | // geometry. |
| 128 | kWindingStencil1_StencilPass, //<! records in/out in stencil buffer |
| 129 | // using the Winding fill rule. |
| 130 | kWindingStencil2_StencilPass, //<! records in/out in stencil buffer |
| 131 | // using the Winding fill rule. |
| 132 | // Run when single-stencil-pass winding |
| 133 | // not supported (i.e. no separate |
| 134 | // stencil support) |
| 135 | kWindingColor_StencilPass, //<! writes colors to color target in |
| 136 | // pixels marked inside the fill by |
| 137 | // kWindFillStencil_StencilPass. Clears |
| 138 | // stencil in pixels covered by |
| 139 | // geometry. |
| 140 | kDrawTargetCount_StencilPass //<! Subclass may extend this enum to use |
| 141 | // the stencil for other purposes (e.g. |
| 142 | // to do stencil-based clipping) |
| 143 | // This value is provided as basis for |
| 144 | // defining these extended enum values. |
| 145 | }; |
| 146 | |
| 147 | protected: |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 148 | |
reed@google.com | 8195f67 | 2011-01-12 18:14:28 +0000 | [diff] [blame] | 149 | struct DrState { |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 150 | uint32_t fFlagBits; |
| 151 | BlendCoeff fSrcBlend; |
| 152 | BlendCoeff fDstBlend; |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 153 | GrTexture* fTextures[kNumStages]; |
| 154 | GrSamplerState fSamplerStates[kNumStages]; |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 155 | GrRenderTarget* fRenderTarget; |
| 156 | GrColor fColor; |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 157 | StencilPass fStencilPass; |
| 158 | bool fReverseFill; |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 159 | GrMatrix fViewMatrix; |
| 160 | GrMatrix fTextureMatrices[kNumStages]; |
reed@google.com | 8195f67 | 2011-01-12 18:14:28 +0000 | [diff] [blame] | 161 | bool operator ==(const DrState& s) const { |
| 162 | return 0 == memcmp(this, &s, sizeof(DrState)); |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 163 | } |
reed@google.com | 8195f67 | 2011-01-12 18:14:28 +0000 | [diff] [blame] | 164 | bool operator !=(const DrState& s) const { return !(*this == s); } |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 165 | }; |
| 166 | |
| 167 | public: |
| 168 | /////////////////////////////////////////////////////////////////////////// |
| 169 | |
| 170 | GrDrawTarget(); |
| 171 | |
| 172 | /** |
| 173 | * Sets the current clip to the region specified by clip. All draws will be |
| 174 | * clipped against this clip if kClip_StateBit is enabled. |
| 175 | * |
| 176 | * @param description of the clipping region |
| 177 | */ |
| 178 | void setClip(const GrClip& clip); |
| 179 | |
| 180 | /** |
| 181 | * Gets the current clip. |
| 182 | * |
| 183 | * @return the clip. |
| 184 | */ |
| 185 | const GrClip& getClip() const; |
| 186 | |
| 187 | /** |
| 188 | * Sets the texture used at the next drawing call |
| 189 | * |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 190 | * @param stage The texture stage for which the texture will be set |
| 191 | * |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 192 | * @param texture The texture to set. Can be NULL though there is no advantage |
| 193 | * to settings a NULL texture if doing non-textured drawing |
| 194 | */ |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 195 | void setTexture(int stage, GrTexture* texture); |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 196 | |
| 197 | /** |
| 198 | * Retrieves the currently set texture. |
| 199 | * |
| 200 | * @return The currently set texture. The return value will be NULL if no |
| 201 | * texture has been set, NULL was most recently passed to |
| 202 | * setTexture, or the last setTexture was destroyed. |
| 203 | */ |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 204 | const GrTexture* getTexture(int stage) const; |
| 205 | GrTexture* getTexture(int stage); |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 206 | |
| 207 | /** |
| 208 | * Sets the rendertarget used at the next drawing call |
| 209 | * |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 210 | * @param target The render target to set. |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 211 | */ |
| 212 | void setRenderTarget(GrRenderTarget* target); |
| 213 | |
| 214 | /** |
| 215 | * Retrieves the currently set rendertarget. |
| 216 | * |
| 217 | * @return The currently set render target. |
| 218 | */ |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 219 | const GrRenderTarget* getRenderTarget() const; |
| 220 | GrRenderTarget* getRenderTarget(); |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 221 | |
| 222 | /** |
| 223 | * Sets the sampler state for the next draw. |
| 224 | * |
| 225 | * The sampler state determines the address wrap modes and |
| 226 | * filtering |
| 227 | * |
| 228 | * @param samplerState Specifies the sampler state. |
| 229 | */ |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 230 | void setSamplerState(int stage, const GrSamplerState& samplerState); |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 231 | |
| 232 | /** |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 233 | * Sets the matrix applied to texture coordinates for a stage. |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 234 | * |
| 235 | * The post-matrix texture coordinates in the square [0,1]^2 cover the |
| 236 | * entire area of the texture. This means the full POT width when a NPOT |
| 237 | * texture is embedded in a POT width texture to meet the 3D API |
| 238 | * requirements. The texture matrix is applied both when the texture |
| 239 | * coordinates are explicit and when vertex positions are used as texture |
| 240 | * coordinates. In the latter case the texture matrix is applied to the |
| 241 | * pre-modelview position values. |
| 242 | * |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 243 | * @param stage the stage for which to set a matrix. |
| 244 | * @param m the matrix used to transform the texture coordinates. |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 245 | */ |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 246 | void setTextureMatrix(int stage, const GrMatrix& m); |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 247 | |
| 248 | /** |
| 249 | * Sets the matrix applied to veretx positions. |
| 250 | * |
| 251 | * In the post-view-matrix space the rectangle [0,w]x[0,h] |
| 252 | * fully covers the render target. (w and h are the width and height of the |
| 253 | * the rendertarget.) |
| 254 | * |
| 255 | * @param m the matrix used to transform the vertex positions. |
| 256 | */ |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 257 | void setViewMatrix(const GrMatrix& m); |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 258 | |
| 259 | /** |
| 260 | * Multiplies the current view matrix by a matrix |
| 261 | * |
| 262 | * After this call V' = V*m where V is the old view matrix, |
| 263 | * m is the parameter to this function, and V' is the new view matrix. |
| 264 | * (We consider positions to be column vectors so position vector p is |
| 265 | * transformed by matrix X as p' = X*p.) |
| 266 | * |
| 267 | * @param m the matrix used to modify the modelview matrix. |
| 268 | */ |
| 269 | void concatViewMatrix(const GrMatrix& m); |
| 270 | |
| 271 | /** |
| 272 | * Sets color for next draw to a premultiplied-alpha color. |
| 273 | * |
| 274 | * @param the color to set. |
| 275 | */ |
| 276 | void setColor(GrColor); |
| 277 | |
| 278 | /** |
| 279 | * Sets the color to be used for the next draw to be |
| 280 | * (r,g,b,a) = (alpha, alpha, alpha, alpha). |
| 281 | * |
| 282 | * @param alpha The alpha value to set as the color. |
| 283 | */ |
| 284 | void setAlpha(uint8_t alpha); |
| 285 | |
| 286 | /** |
| 287 | * Sets pass for path rendering |
| 288 | * |
| 289 | * @param pass of path rendering |
| 290 | */ |
| 291 | void setStencilPass(StencilPass pass); |
| 292 | |
| 293 | /** |
| 294 | * Reveses the in/out decision of the fill rule for path rendering. |
| 295 | * Only affects kEOFillColor_StencilPass and kWindingFillColor_StencilPass |
| 296 | * |
| 297 | * @param reverse true to reverse, false otherwise |
| 298 | */ |
| 299 | void setReverseFill(bool reverse); |
| 300 | |
| 301 | /** |
| 302 | * Enable render state settings. |
| 303 | * |
| 304 | * @param flags bitfield of StateBits specifing the states to enable |
| 305 | */ |
| 306 | void enableState(uint32_t stateBits); |
| 307 | |
| 308 | /** |
| 309 | * Disable render state settings. |
| 310 | * |
| 311 | * @param flags bitfield of StateBits specifing the states to disable |
| 312 | */ |
| 313 | void disableState(uint32_t stateBits); |
| 314 | |
| 315 | bool isDitherState() const { |
| 316 | return fCurrDrawState.fFlagBits & kDither_StateBit; |
| 317 | } |
| 318 | |
| 319 | /** |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 320 | * Sets the blending function coeffecients. |
| 321 | * |
| 322 | * The blend function will be: |
| 323 | * D' = sat(S*srcCoef + D*dstCoef) |
| 324 | * |
| 325 | * where D is the existing destination color, S is the incoming source |
| 326 | * color, and D' is the new destination color that will be written. sat() |
| 327 | * is the saturation function. |
| 328 | * |
| 329 | * @param srcCoef coeffecient applied to the src color. |
| 330 | * @param dstCoef coeffecient applied to the dst color. |
| 331 | */ |
| 332 | void setBlendFunc(BlendCoeff srcCoef, BlendCoeff dstCoef); |
| 333 | |
| 334 | /** |
| 335 | * Retrieves the current view matrix |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 336 | * return the current view matrix. |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 337 | */ |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 338 | const GrMatrix& getViewMatrix() const; |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 339 | |
| 340 | /** |
| 341 | * Retrieves the inverse of the current view matrix. |
| 342 | * |
| 343 | * If the current view matrix is invertible, return true, and if matrix |
| 344 | * is non-null, copy the inverse into it. If the current view matrix is |
| 345 | * non-invertible, return false and ignore the matrix parameter. |
| 346 | * |
| 347 | * @param matrix if not null, will receive a copy of the current inverse. |
| 348 | */ |
| 349 | bool getViewInverse(GrMatrix* matrix) const; |
| 350 | |
| 351 | /** |
| 352 | * Used to save and restore the GrGpu's drawing state |
| 353 | */ |
| 354 | struct SavedDrawState { |
| 355 | private: |
reed@google.com | 8195f67 | 2011-01-12 18:14:28 +0000 | [diff] [blame] | 356 | DrState fState; |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 357 | friend class GrDrawTarget; |
| 358 | }; |
| 359 | |
| 360 | /** |
| 361 | * Saves the current draw state. The state can be restored at a later time |
| 362 | * with restoreDrawState. |
| 363 | * |
| 364 | * See also AutoStateRestore class. |
| 365 | * |
| 366 | * @param state will hold the state after the function returns. |
| 367 | */ |
| 368 | void saveCurrentDrawState(SavedDrawState* state) const; |
| 369 | |
| 370 | /** |
| 371 | * Restores previously saved draw state. The client guarantees that state |
| 372 | * was previously passed to saveCurrentDrawState and that the rendertarget |
| 373 | * and texture set at save are still valid. |
| 374 | * |
| 375 | * See also AutoStateRestore class. |
| 376 | * |
| 377 | * @param state the previously saved state to restore. |
| 378 | */ |
| 379 | void restoreDrawState(const SavedDrawState& state); |
| 380 | |
| 381 | /** |
| 382 | * Copies the draw state from another target to this target. |
| 383 | * |
| 384 | * @param srcTarget draw target used as src of the draw state. |
| 385 | */ |
| 386 | void copyDrawState(const GrDrawTarget& srcTarget); |
| 387 | |
| 388 | /** |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 389 | * The format of vertices is represented as a bitfield of flags. |
| 390 | * Flags that indicate the layout of vertex data. Vertices always contain |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 391 | * positions and may also contain up to kMaxTexCoords sets of 2D texture |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 392 | * coordinates and per-vertex colors. Each stage can use any of the texture |
| 393 | * coordinates as its input texture coordinates or it may use the positions. |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 394 | * |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 395 | * If no texture coordinates are specified for a stage then the stage is |
| 396 | * disabled. |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 397 | * |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 398 | * Only one type of texture coord can be specified per stage. For |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 399 | * example StageTexCoordVertexLayoutBit(0, 2) and |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 400 | * StagePosAsTexCoordVertexLayoutBit(0) cannot both be specified. |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 401 | * |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 402 | * The order in memory is always (position, texture coord 0, ..., color) |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 403 | * with any unused fields omitted. Note that this means that if only texture |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 404 | * coordinates 1 is referenced then there is no texture coordinates 0 and |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 405 | * the order would be (position, texture coordinate 1[, color]). |
| 406 | */ |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 407 | |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 408 | /** |
| 409 | * Generates a bit indicating that a texture stage uses texture coordinates |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 410 | * |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 411 | * @param stage the stage that will use texture coordinates. |
| 412 | * @param texCoordIdx the index of the texture coordinates to use |
| 413 | * |
| 414 | * @return the bit to add to a GrVertexLayout bitfield. |
| 415 | */ |
| 416 | static int StageTexCoordVertexLayoutBit(int stage, int texCoordIdx) { |
| 417 | GrAssert(stage < kNumStages); |
| 418 | GrAssert(texCoordIdx < kMaxTexCoords); |
| 419 | return 1 << (stage + (texCoordIdx * kNumStages)); |
| 420 | } |
| 421 | private: |
| 422 | static const int TEX_COORD_BIT_CNT = kNumStages*kMaxTexCoords; |
| 423 | public: |
| 424 | /** |
| 425 | * Generates a bit indicating that a texture stage uses the position |
| 426 | * as its texture coordinate. |
| 427 | * |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 428 | * @param stage the stage that will use position as texture |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 429 | * coordinates. |
| 430 | * |
| 431 | * @return the bit to add to a GrVertexLayout bitfield. |
| 432 | */ |
| 433 | static int StagePosAsTexCoordVertexLayoutBit(int stage) { |
| 434 | GrAssert(stage < kNumStages); |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 435 | return (1 << (TEX_COORD_BIT_CNT + stage)); |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 436 | } |
| 437 | private: |
| 438 | static const int STAGE_BIT_CNT = TEX_COORD_BIT_CNT + kNumStages; |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 439 | |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 440 | public: |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 441 | |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 442 | /** |
| 443 | * Additional Bits that can be specified in GrVertexLayout. |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 444 | */ |
| 445 | enum VertexLayoutBits { |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 446 | |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 447 | kColor_VertexLayoutBit = 1 << (STAGE_BIT_CNT + 0), |
| 448 | //<! vertices have colors |
| 449 | kTextFormat_VertexLayoutBit = 1 << (STAGE_BIT_CNT + 1), |
| 450 | //<! use text vertices. (Pos |
| 451 | // and tex coords may be |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 452 | // a different type for |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 453 | // text [GrGpuTextVertex vs |
| 454 | // GrPoint].) |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 455 | // for below assert |
| 456 | kDummy, |
| 457 | kHighVertexLayoutBit = kDummy - 1 |
| 458 | }; |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 459 | // make sure we haven't exceeded the number of bits in GrVertexLayout. |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 460 | GR_STATIC_ASSERT(kHighVertexLayoutBit < (1 << 8*sizeof(GrVertexLayout))); |
| 461 | |
| 462 | /** |
| 463 | * Reserves space for vertices and/or indices. Draw target will use |
| 464 | * reserved vertices / indices at next draw. |
| 465 | * |
| 466 | * If succeeds: |
| 467 | * if vertexCount is nonzero, *vertices will be the array |
| 468 | * of vertices to be filled by caller. The next draw will read |
| 469 | * these vertices. |
| 470 | * |
| 471 | * if indecCount is nonzero, *indices will be the array of indices |
| 472 | * to be filled by caller. The next indexed draw will read from |
| 473 | * these indices. |
| 474 | * |
| 475 | * If a client does not already have a vertex buffer or cpu arrays then this |
| 476 | * is the preferred way to allocate vertex/index array. It allows the |
| 477 | * subclass of GrDrawTarget to decide whether to put data in buffers, to |
| 478 | * group vertex data that uses the same state (e.g. for deferred rendering), |
| 479 | * etc. |
| 480 | * |
| 481 | * This must be matched with a releaseReservedGeometry call after all |
| 482 | * draws that reference the reserved geometry data have been called. |
| 483 | * |
| 484 | * AutoGeometryRelease can be used to automatically call the release. |
| 485 | * |
| 486 | * @param vertexCount the number of vertices to reserve space for. Can be 0. |
| 487 | * @param indexCount the number of indices to reserve space for. Can be 0. |
| 488 | * @param vertexLayout the format of vertices (ignored if vertexCount == 0). |
| 489 | * @param vertices will point to reserved vertex space if vertexCount is |
| 490 | * non-zero. Illegal to pass NULL if vertexCount > 0. |
| 491 | * @param indices will point to reserved index space if indexCount is |
| 492 | * non-zero. Illegal to pass NULL if indexCount > 0. |
| 493 | * |
| 494 | * @return true if succeeded in allocating space for the vertices and false |
| 495 | * if not. |
| 496 | */ |
| 497 | bool reserveAndLockGeometry(GrVertexLayout vertexLayout, |
| 498 | uint32_t vertexCount, |
| 499 | uint32_t indexCount, |
| 500 | void** vertices, |
| 501 | void** indices); |
| 502 | /** |
| 503 | * Provides hints to caller about the number of vertices and indices |
| 504 | * that can be allocated cheaply. This can be useful if caller is reserving |
| 505 | * space but doesn't know exactly how much geometry is needed. |
| 506 | * |
| 507 | * Also may hint whether the draw target should be flushed first. This is |
| 508 | * useful for deferred targets. |
| 509 | * |
| 510 | * @param vertexLayout layout of vertices caller would like to reserve |
| 511 | * @param vertexCount in: hint about how many vertices the caller would |
| 512 | * like to allocate. |
| 513 | * out: a hint about the number of vertices that can be |
| 514 | * allocated cheaply. Negative means no hint. |
| 515 | * Ignored if NULL. |
| 516 | * @param indexCount in: hint about how many indices the caller would |
| 517 | * like to allocate. |
| 518 | * out: a hint about the number of indices that can be |
| 519 | * allocated cheaply. Negative means no hint. |
| 520 | * Ignored if NULL. |
| 521 | * |
| 522 | * @return true if target should be flushed based on the input values. |
| 523 | */ |
| 524 | virtual bool geometryHints(GrVertexLayout vertexLayout, |
| 525 | int32_t* vertexCount, |
| 526 | int32_t* indexCount) const; |
| 527 | |
| 528 | /** |
| 529 | * Releases reserved vertex/index data from reserveAndLockGeometry(). |
| 530 | */ |
| 531 | void releaseReservedGeometry(); |
| 532 | |
| 533 | /** |
| 534 | * Sets source of vertex data for the next draw. Data does not have to be |
| 535 | * in the array until drawIndexed or drawNonIndexed. |
| 536 | * |
| 537 | * @param array cpu array containing vertex data. |
| 538 | * @param vertexLayout layout of the vertex data in the array. |
| 539 | */ |
| 540 | void setVertexSourceToArray(const void* array, GrVertexLayout vertexLayout); |
| 541 | |
| 542 | /** |
| 543 | * Sets source of index data for the next indexed draw. Data does not have |
| 544 | * to be in the array until drawIndexed or drawNonIndexed. |
| 545 | * |
| 546 | * @param array cpu array containing index data. |
| 547 | */ |
| 548 | void setIndexSourceToArray(const void* array); |
| 549 | |
| 550 | /** |
| 551 | * Sets source of vertex data for the next draw. Data does not have to be |
| 552 | * in the buffer until drawIndexed or drawNonIndexed. |
| 553 | * |
| 554 | * @param buffer vertex buffer containing vertex data. Must be |
| 555 | * unlocked before draw call. |
| 556 | * @param vertexLayout layout of the vertex data in the buffer. |
| 557 | */ |
| 558 | void setVertexSourceToBuffer(const GrVertexBuffer* buffer, |
| 559 | GrVertexLayout vertexLayout); |
| 560 | |
| 561 | /** |
| 562 | * Sets source of index data for the next indexed draw. Data does not have |
| 563 | * to be in the buffer until drawIndexed or drawNonIndexed. |
| 564 | * |
| 565 | * @param buffer index buffer containing indices. Must be unlocked |
| 566 | * before indexed draw call. |
| 567 | */ |
| 568 | void setIndexSourceToBuffer(const GrIndexBuffer* buffer); |
| 569 | |
| 570 | /** |
| 571 | * Draws indexed geometry using the current state and current vertex / index |
| 572 | * sources. |
| 573 | * |
| 574 | * @param type The type of primitives to draw. |
| 575 | * @param startVertex the vertex in the vertex array/buffer corresponding |
| 576 | * to index 0 |
| 577 | * @param startIndex first index to read from index src. |
| 578 | * @param vertexCount one greater than the max index. |
| 579 | * @param indexCount the number of index elements to read. The index count |
| 580 | * is effectively trimmed to the last completely |
| 581 | * specified primitive. |
| 582 | */ |
| 583 | virtual void drawIndexed(PrimitiveType type, |
| 584 | uint32_t startVertex, |
| 585 | uint32_t startIndex, |
| 586 | uint32_t vertexCount, |
| 587 | uint32_t indexCount) = 0; |
| 588 | |
| 589 | /** |
| 590 | * Draws non-indexed geometry using the current state and current vertex |
| 591 | * sources. |
| 592 | * |
| 593 | * @param type The type of primitives to draw. |
| 594 | * @param startVertex the vertex in the vertex array/buffer corresponding |
| 595 | * to index 0 |
| 596 | * @param vertexCount one greater than the max index. |
| 597 | */ |
| 598 | virtual void drawNonIndexed(PrimitiveType type, |
| 599 | uint32_t startVertex, |
| 600 | uint32_t vertexCount) = 0; |
| 601 | |
| 602 | /////////////////////////////////////////////////////////////////////////// |
| 603 | |
| 604 | class AutoStateRestore : ::GrNoncopyable { |
| 605 | public: |
| 606 | AutoStateRestore(GrDrawTarget* target); |
| 607 | ~AutoStateRestore(); |
| 608 | |
| 609 | private: |
| 610 | GrDrawTarget* fDrawTarget; |
| 611 | SavedDrawState fDrawState; |
| 612 | }; |
| 613 | |
| 614 | /////////////////////////////////////////////////////////////////////////// |
| 615 | |
| 616 | class AutoReleaseGeometry : ::GrNoncopyable { |
| 617 | public: |
| 618 | AutoReleaseGeometry(GrDrawTarget* target, |
| 619 | GrVertexLayout vertexLayout, |
| 620 | uint32_t vertexCount, |
| 621 | uint32_t indexCount) { |
| 622 | fTarget = target; |
| 623 | fSuccess = fTarget->reserveAndLockGeometry(vertexLayout, |
| 624 | vertexCount, |
| 625 | indexCount, |
| 626 | &fVertices, |
| 627 | &fIndices); |
| 628 | } |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 629 | |
| 630 | AutoReleaseGeometry() { |
| 631 | fSuccess = false; |
| 632 | } |
| 633 | |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 634 | ~AutoReleaseGeometry() { |
| 635 | if (fSuccess) { |
| 636 | fTarget->releaseReservedGeometry(); |
| 637 | } |
| 638 | } |
| 639 | |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 640 | bool set(GrDrawTarget* target, |
| 641 | GrVertexLayout vertexLayout, |
| 642 | uint32_t vertexCount, |
| 643 | uint32_t indexCount) { |
| 644 | if (fSuccess) { |
| 645 | fTarget->releaseReservedGeometry(); |
| 646 | } |
| 647 | fTarget = target; |
| 648 | fSuccess = fTarget->reserveAndLockGeometry(vertexLayout, |
| 649 | vertexCount, |
| 650 | indexCount, |
| 651 | &fVertices, |
| 652 | &fIndices); |
| 653 | return fSuccess; |
| 654 | } |
| 655 | |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 656 | bool succeeded() const { return fSuccess; } |
| 657 | void* vertices() const { return fVertices; } |
| 658 | void* indices() const { return fIndices; } |
| 659 | |
| 660 | GrPoint* positions() const { |
| 661 | return static_cast<GrPoint*>(fVertices); |
| 662 | } |
| 663 | |
| 664 | private: |
| 665 | GrDrawTarget* fTarget; |
| 666 | bool fSuccess; |
| 667 | void* fVertices; |
| 668 | void* fIndices; |
| 669 | }; |
| 670 | |
| 671 | /////////////////////////////////////////////////////////////////////////// |
| 672 | |
| 673 | class AutoClipRestore : ::GrNoncopyable { |
| 674 | public: |
| 675 | AutoClipRestore(GrDrawTarget* target) { |
| 676 | fTarget = target; |
| 677 | fClip = fTarget->getClip(); |
| 678 | } |
| 679 | |
| 680 | ~AutoClipRestore() { |
| 681 | fTarget->setClip(fClip); |
| 682 | } |
| 683 | private: |
| 684 | GrDrawTarget* fTarget; |
| 685 | GrClip fClip; |
| 686 | }; |
| 687 | |
| 688 | //////////////////////////////////////////////////////////////////////////// |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 689 | // Helpers for picking apart vertex layouts |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 690 | |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 691 | /** |
| 692 | * Helper function to compute the size of a vertex from a vertex layout |
| 693 | * @return size of a single vertex. |
| 694 | */ |
| 695 | static size_t VertexSize(GrVertexLayout vertexLayout); |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 696 | |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 697 | /** |
| 698 | * Helper function for determining the index of texture coordinates that |
| 699 | * is input for a texture stage. Note that a stage may instead use positions |
| 700 | * as texture coordinates, in which case the result of the function is |
| 701 | * indistinguishable from the case when the stage is disabled. |
| 702 | * |
| 703 | * @param stage the stage to query |
| 704 | * @param vertexLayout layout to query |
| 705 | * |
| 706 | * @return the texture coordinate index or -1 if the stage doesn't use |
| 707 | * separate (non-position) texture coordinates. |
| 708 | */ |
| 709 | static int VertexTexCoordsForStage(int stage, GrVertexLayout vertexLayout); |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 710 | |
| 711 | /** |
| 712 | * Helper function to compute the offset of texture coordinates in a vertex |
| 713 | * @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^] | 714 | * layout has no texture coordinates. Will be 0 if positions are |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 715 | * used as texture coordinates for the stage. |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 716 | */ |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 717 | static int VertexStageCoordOffset(int stage, GrVertexLayout vertexLayout); |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 718 | |
| 719 | /** |
| 720 | * Helper function to compute the offset of the color in a vertex |
| 721 | * @return offset of color in vertex layout or -1 if the |
| 722 | * layout has no color. |
| 723 | */ |
| 724 | static int VertexColorOffset(GrVertexLayout vertexLayout); |
| 725 | |
| 726 | /** |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 727 | * Helper function to determine if vertex layout contains explicit texture |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 728 | * coordinates of some index. |
| 729 | * |
| 730 | * @param coordIndex the tex coord index to query |
| 731 | * @param vertexLayout layout to query |
| 732 | * |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 733 | * @return true if vertex specifies texture coordinates for the index, |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 734 | * false otherwise. |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 735 | */ |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 736 | static bool VertexUsesTexCoordIdx(int coordIndex, |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 737 | GrVertexLayout vertexLayout); |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 738 | |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 739 | /** |
| 740 | * Helper function to determine if vertex layout contains either explicit or |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 741 | * implicit texture coordinates for a stage. |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 742 | * |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 743 | * @param stage the stage to query |
| 744 | * @param vertexLayout layout to query |
| 745 | * |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 746 | * @return true if vertex specifies texture coordinates for the stage, |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 747 | * false otherwise. |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 748 | */ |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 749 | static bool VertexUsesStage(int stage, GrVertexLayout vertexLayout); |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 750 | |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 751 | /** |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 752 | * Helper function to compute the size of each vertex and the offsets of |
| 753 | * texture coordinates and color. Determines tex coord offsets by tex coord |
| 754 | * 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] | 755 | * by StageTexCoordVertexLayoutBit.) |
| 756 | * |
| 757 | * @param vertexLayout the layout to query |
| 758 | * @param texCoordOffsetsByIdx after return it is the offset of each |
| 759 | * tex coord index in the vertex or -1 if |
| 760 | * index isn't used. |
| 761 | * @return size of a single vertex |
| 762 | */ |
| 763 | static int VertexSizeAndOffsetsByIdx(GrVertexLayout vertexLayout, |
| 764 | int texCoordOffsetsByIdx[kMaxTexCoords], |
| 765 | int *colorOffset); |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 766 | |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 767 | /** |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 768 | * Helper function to compute the size of each vertex and the offsets of |
| 769 | * texture coordinates and color. Determines tex coord offsets by stage |
| 770 | * rather than by index. (Each stage can be mapped to any t.c. index |
| 771 | * by StageTexCoordVertexLayoutBit.) If a stage uses positions for |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 772 | * tex coords then that stage's offset will be 0 (positions are always at 0). |
| 773 | * |
| 774 | * @param vertexLayout the layout to query |
| 775 | * @param texCoordOffsetsByStage after return it is the offset of each |
| 776 | * tex coord index in the vertex or -1 if |
| 777 | * index isn't used. |
| 778 | * @return size of a single vertex |
| 779 | */ |
| 780 | static int VertexSizeAndOffsetsByStage(GrVertexLayout vertexLayout, |
| 781 | int texCoordOffsetsByStage[kNumStages], |
| 782 | int *colorOffset); |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 783 | protected: |
bsalomon@google.com | 5782d71 | 2011-01-21 21:03:59 +0000 | [diff] [blame^] | 784 | |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 785 | // Helpers for GrDrawTarget subclasses that won't have private access to |
| 786 | // SavedDrawState but need to peek at the state values. |
reed@google.com | 8195f67 | 2011-01-12 18:14:28 +0000 | [diff] [blame] | 787 | static DrState& accessSavedDrawState(SavedDrawState& sds) |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 788 | { return sds.fState; } |
reed@google.com | 8195f67 | 2011-01-12 18:14:28 +0000 | [diff] [blame] | 789 | static const DrState& accessSavedDrawState(const SavedDrawState& sds) |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 790 | { return sds.fState; } |
| 791 | |
| 792 | // implemented by subclass |
| 793 | virtual bool acquireGeometryHelper(GrVertexLayout vertexLayout, |
| 794 | void** vertices, |
| 795 | void** indices) = 0; |
| 796 | |
| 797 | virtual void releaseGeometryHelper() = 0; |
| 798 | |
| 799 | virtual void clipWillChange(const GrClip& clip) = 0; |
| 800 | |
| 801 | enum GeometrySrcType { |
| 802 | kArray_GeometrySrcType, |
| 803 | kReserved_GeometrySrcType, |
| 804 | kBuffer_GeometrySrcType |
| 805 | }; |
| 806 | |
| 807 | struct { |
| 808 | bool fLocked; |
| 809 | uint32_t fVertexCount; |
| 810 | uint32_t fIndexCount; |
| 811 | } fReservedGeometry; |
| 812 | |
| 813 | struct GeometrySrc { |
| 814 | GeometrySrcType fVertexSrc; |
| 815 | union { |
| 816 | const GrVertexBuffer* fVertexBuffer; |
| 817 | const void* fVertexArray; |
| 818 | }; |
| 819 | GeometrySrcType fIndexSrc; |
| 820 | union { |
| 821 | const GrIndexBuffer* fIndexBuffer; |
| 822 | const void* fIndexArray; |
| 823 | }; |
| 824 | GrVertexLayout fVertexLayout; |
| 825 | } fGeometrySrc; |
| 826 | |
| 827 | GrClip fClip; |
| 828 | |
reed@google.com | 8195f67 | 2011-01-12 18:14:28 +0000 | [diff] [blame] | 829 | DrState fCurrDrawState; |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 830 | |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 831 | // not meant for outside usage. Could cause problems if calls between |
| 832 | // the save and restore mess with reserved geometry state. |
| 833 | class AutoGeometrySrcRestore { |
| 834 | public: |
| 835 | AutoGeometrySrcRestore(GrDrawTarget* target) { |
| 836 | fTarget = target; |
| 837 | fGeometrySrc = fTarget->fGeometrySrc; |
| 838 | } |
| 839 | ~AutoGeometrySrcRestore() { |
| 840 | fTarget->fGeometrySrc = fGeometrySrc; |
| 841 | } |
| 842 | private: |
| 843 | GrDrawTarget *fTarget; |
| 844 | GeometrySrc fGeometrySrc; |
| 845 | |
| 846 | AutoGeometrySrcRestore(); |
| 847 | AutoGeometrySrcRestore(const AutoGeometrySrcRestore&); |
| 848 | AutoGeometrySrcRestore& operator =(AutoGeometrySrcRestore&); |
| 849 | }; |
| 850 | |
bsalomon@google.com | 8531c1c | 2011-01-13 19:52:45 +0000 | [diff] [blame] | 851 | private: |
| 852 | void VertexLayoutUnitTest(); |
reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame] | 853 | }; |
| 854 | |
| 855 | #endif |