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 | #include "GrGpu.h" |
| 19 | #include "GrMemory.h" |
| 20 | #include "GrTextStrike.h" |
| 21 | #include "GrTextureCache.h" |
| 22 | #include "GrClipIterator.h" |
| 23 | #include "GrIndexBuffer.h" |
| 24 | |
| 25 | /////////////////////////////////////////////////////////////////////////////// |
| 26 | |
| 27 | size_t GrTexture::BytesPerPixel(PixelConfig config) { |
| 28 | switch (config) { |
| 29 | case kAlpha_8_PixelConfig: |
| 30 | case kIndex_8_PixelConfig: |
| 31 | return 1; |
| 32 | case kRGB_565_PixelConfig: |
| 33 | case kRGBA_4444_PixelConfig: |
| 34 | return 2; |
| 35 | case kRGBA_8888_PixelConfig: |
| 36 | case kRGBX_8888_PixelConfig: |
| 37 | return 4; |
| 38 | default: |
| 39 | return 0; |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | bool GrTexture::PixelConfigIsOpaque(PixelConfig config) { |
| 44 | switch (config) { |
| 45 | case GrTexture::kRGB_565_PixelConfig: |
| 46 | case GrTexture::kRGBX_8888_PixelConfig: |
| 47 | return true; |
| 48 | default: |
| 49 | return false; |
| 50 | } |
| 51 | } |
| 52 | |
| 53 | |
| 54 | /////////////////////////////////////////////////////////////////////////////// |
| 55 | |
| 56 | extern void gr_run_unittests(); |
| 57 | |
| 58 | GrGpu::GrGpu() : f8bitPaletteSupport(false), |
| 59 | fNPOTTextureSupport(kNone_NPOTTextureType), |
| 60 | fQuadIndexBuffer(NULL) { |
| 61 | #if GR_DEBUG |
| 62 | // gr_run_unittests(); |
| 63 | #endif |
| 64 | resetStats(); |
| 65 | } |
| 66 | |
| 67 | GrGpu::~GrGpu() { |
| 68 | if (NULL != fQuadIndexBuffer) { |
| 69 | fQuadIndexBuffer->unref(); |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | void GrGpu::resetContext() { |
| 74 | } |
| 75 | |
| 76 | void GrGpu::unimpl(const char msg[]) { |
| 77 | // GrPrintf("--- GrGpu unimplemented(\"%s\")\n", msg); |
| 78 | } |
| 79 | |
| 80 | /////////////////////////////////////////////////////////////////////////////// |
| 81 | |
| 82 | bool GrGpu::canDisableBlend() const { |
| 83 | if ((kOne_BlendCoeff == fCurrDrawState.fSrcBlend) && |
| 84 | (kZero_BlendCoeff == fCurrDrawState.fDstBlend)) { |
| 85 | return true; |
| 86 | } |
| 87 | |
| 88 | // If we have vertex color without alpha then we can't force blend off |
| 89 | if ((fGeometrySrc.fVertexLayout & kColor_VertexLayoutBit) || |
| 90 | 0xff != GrColorUnpackA(fCurrDrawState.fColor)) { |
| 91 | return false; |
| 92 | } |
| 93 | |
| 94 | // If the src coef will always be 1... |
| 95 | bool fullSrc = kSA_BlendCoeff == fCurrDrawState.fSrcBlend || |
| 96 | kOne_BlendCoeff == fCurrDrawState.fSrcBlend; |
| 97 | |
| 98 | // ...and the dst coef is always 0... |
| 99 | bool noDst = kISA_BlendCoeff == fCurrDrawState.fDstBlend || |
| 100 | kZero_BlendCoeff == fCurrDrawState.fDstBlend; |
| 101 | |
| 102 | // ...and there isn't a texture with an alpha channel... |
| 103 | bool noTexAlpha = !VertexHasTexCoords(fGeometrySrc.fVertexLayout) || |
| 104 | fCurrDrawState.fTexture->config() == GrTexture::kRGB_565_PixelConfig || |
| 105 | fCurrDrawState.fTexture->config() == GrTexture::kRGBX_8888_PixelConfig; |
| 106 | |
| 107 | // ...then we disable blend. |
| 108 | return fullSrc && noDst && noTexAlpha; |
| 109 | } |
| 110 | |
| 111 | /////////////////////////////////////////////////////////////////////////////// |
| 112 | |
| 113 | static const int MAX_QUADS = 512; // max possible: (1 << 14) - 1; |
| 114 | |
| 115 | GR_STATIC_ASSERT(4 * MAX_QUADS <= UINT16_MAX); |
| 116 | |
| 117 | static inline void fillIndices(uint16_t* indices, int quadCount) { |
| 118 | for (int i = 0; i < quadCount; ++i) { |
| 119 | indices[6 * i + 0] = 4 * i + 0; |
| 120 | indices[6 * i + 1] = 4 * i + 1; |
| 121 | indices[6 * i + 2] = 4 * i + 2; |
| 122 | indices[6 * i + 3] = 4 * i + 0; |
| 123 | indices[6 * i + 4] = 4 * i + 2; |
| 124 | indices[6 * i + 5] = 4 * i + 3; |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | const GrIndexBuffer* GrGpu::quadIndexBuffer() const { |
| 129 | if (NULL == fQuadIndexBuffer) { |
| 130 | static const int SIZE = sizeof(uint16_t) * 6 * MAX_QUADS; |
| 131 | GrGpu* me = const_cast<GrGpu*>(this); |
| 132 | fQuadIndexBuffer = me->createIndexBuffer(SIZE, false); |
| 133 | if (NULL != fQuadIndexBuffer) { |
| 134 | uint16_t* indices = (uint16_t*)fQuadIndexBuffer->lock(); |
| 135 | if (NULL != indices) { |
| 136 | fillIndices(indices, MAX_QUADS); |
| 137 | fQuadIndexBuffer->unlock(); |
| 138 | } else { |
| 139 | indices = (uint16_t*)GrMalloc(SIZE); |
| 140 | fillIndices(indices, MAX_QUADS); |
| 141 | if (!fQuadIndexBuffer->updateData(indices, SIZE)) { |
| 142 | fQuadIndexBuffer->unref(); |
| 143 | fQuadIndexBuffer = NULL; |
| 144 | GrAssert(!"Can't get indices into buffer!"); |
| 145 | } |
| 146 | GrFree(indices); |
| 147 | } |
| 148 | } |
| 149 | } |
| 150 | |
| 151 | return fQuadIndexBuffer; |
| 152 | } |
| 153 | |
| 154 | int GrGpu::maxQuadsInIndexBuffer() const { |
| 155 | return (NULL == this->quadIndexBuffer()) ? 0 : MAX_QUADS; |
| 156 | } |
| 157 | |
| 158 | /////////////////////////////////////////////////////////////////////////////// |
| 159 | |
| 160 | void GrGpu::clipWillChange(const GrClip& clip) { |
| 161 | if (clip != fClip) { |
| 162 | fClipState.fClipIsDirty = true; |
| 163 | } |
| 164 | } |
| 165 | |
| 166 | bool GrGpu::setupClipAndFlushState(PrimitiveType type) { |
| 167 | const GrIRect* r = NULL; |
| 168 | |
| 169 | if (fCurrDrawState.fFlagBits & kClip_StateBit) { |
| 170 | fClipState.fClipInStencil = fClip.countRects() > 1; |
| 171 | |
| 172 | if (fClipState.fClipInStencil && |
| 173 | (fClipState.fClipIsDirty || |
| 174 | fClipState.fStencilClipTarget != fCurrDrawState.fRenderTarget)) { |
| 175 | |
| 176 | AutoStateRestore asr(this); |
| 177 | AutoGeometrySrcRestore agsr(this); |
| 178 | this->disableState(kClip_StateBit); |
| 179 | eraseStencilClip(); |
| 180 | |
| 181 | int rectTotal = fClip.countRects(); |
| 182 | static const int PtsPerRect = 4; |
| 183 | // this may be called while geometry is already reserved by the |
| 184 | // client. So we use our own vertex array where we avoid malloc |
| 185 | // if we have 4 or fewer rects. |
| 186 | GrAutoSTMalloc<PtsPerRect * 4, GrPoint> vertices(PtsPerRect * |
| 187 | rectTotal); |
| 188 | this->setVertexSourceToArray(vertices.get(), 0); |
| 189 | int currRect = 0; |
| 190 | while (currRect < rectTotal) { |
| 191 | int rectCount = GrMin(this->maxQuadsInIndexBuffer(), |
| 192 | rectTotal - currRect); |
| 193 | |
| 194 | GrPoint* verts = (GrPoint*)vertices + |
| 195 | (currRect * PtsPerRect); |
| 196 | |
| 197 | for (int i = 0; i < rectCount; i++) { |
| 198 | GrRect r(fClip.getRects()[i + currRect]); |
| 199 | verts = r.setRectFan(verts); |
| 200 | } |
| 201 | this->setIndexSourceToBuffer(quadIndexBuffer()); |
| 202 | |
| 203 | this->setViewMatrix(GrMatrix::I()); |
| 204 | this->setStencilPass((GrDrawTarget::StencilPass)kSetClip_StencilPass); |
| 205 | this->drawIndexed(GrGpu::kTriangles_PrimitiveType, |
| 206 | currRect * PtsPerRect, 0, |
| 207 | rectCount * PtsPerRect, rectCount * 6); |
| 208 | |
| 209 | currRect += rectCount; |
| 210 | } |
| 211 | fClipState.fStencilClipTarget = fCurrDrawState.fRenderTarget; |
| 212 | } |
| 213 | fClipState.fClipIsDirty = false; |
| 214 | if (!fClipState.fClipInStencil) { |
| 215 | r = &fClip.getBounds(); |
| 216 | } |
| 217 | } |
| 218 | // Must flush the scissor after graphics state |
| 219 | if (!flushGraphicsState(type)) { |
| 220 | return false; |
| 221 | } |
| 222 | flushScissor(r); |
| 223 | return true; |
| 224 | } |
| 225 | |
| 226 | |
| 227 | /////////////////////////////////////////////////////////////////////////////// |
| 228 | |
| 229 | void GrGpu::drawIndexed(PrimitiveType type, |
| 230 | uint32_t startVertex, |
| 231 | uint32_t startIndex, |
| 232 | uint32_t vertexCount, |
| 233 | uint32_t indexCount) { |
| 234 | GrAssert(kReserved_GeometrySrcType != fGeometrySrc.fVertexSrc || |
| 235 | fReservedGeometry.fLocked); |
| 236 | GrAssert(kReserved_GeometrySrcType != fGeometrySrc.fIndexSrc || |
| 237 | fReservedGeometry.fLocked); |
| 238 | |
| 239 | if (!setupClipAndFlushState(type)) { |
| 240 | return; |
| 241 | } |
| 242 | |
| 243 | #if GR_COLLECT_STATS |
| 244 | fStats.fVertexCnt += vertexCount; |
| 245 | fStats.fIndexCnt += indexCount; |
| 246 | fStats.fDrawCnt += 1; |
| 247 | #endif |
| 248 | |
| 249 | setupGeometry(startVertex, startIndex, vertexCount, indexCount); |
| 250 | |
| 251 | drawIndexedHelper(type, startVertex, startIndex, |
| 252 | vertexCount, indexCount); |
| 253 | } |
| 254 | |
| 255 | void GrGpu::drawNonIndexed(PrimitiveType type, |
| 256 | uint32_t startVertex, |
| 257 | uint32_t vertexCount) { |
| 258 | GrAssert(kReserved_GeometrySrcType != fGeometrySrc.fVertexSrc || |
| 259 | fReservedGeometry.fLocked); |
| 260 | |
| 261 | if (!setupClipAndFlushState(type)) { |
| 262 | return; |
| 263 | } |
| 264 | #if GR_COLLECT_STATS |
| 265 | fStats.fVertexCnt += vertexCount; |
| 266 | fStats.fDrawCnt += 1; |
| 267 | #endif |
| 268 | |
| 269 | setupGeometry(startVertex, 0, vertexCount, 0); |
| 270 | |
| 271 | drawNonIndexedHelper(type, startVertex, vertexCount); |
| 272 | } |
| 273 | |
| 274 | bool GrGpu::acquireGeometryHelper(GrVertexLayout vertexLayout, |
| 275 | void** vertices, |
| 276 | void** indices) { |
| 277 | GrAssert((fReservedGeometry.fVertexCount == 0) || |
| 278 | (NULL != vertices)); |
| 279 | if (NULL != vertices) { |
| 280 | *vertices = fVertices.realloc(VertexSize(vertexLayout) * |
| 281 | fReservedGeometry.fVertexCount); |
| 282 | if (!*vertices && fReservedGeometry.fVertexCount) { |
| 283 | return false; |
| 284 | } |
| 285 | } |
| 286 | GrAssert((fReservedGeometry.fIndexCount == 0) || |
| 287 | (NULL != indices)); |
| 288 | if (NULL != indices) { |
| 289 | *indices = fIndices.realloc(sizeof(uint16_t) * |
| 290 | fReservedGeometry.fIndexCount); |
| 291 | if (!*indices && fReservedGeometry.fIndexCount) { |
| 292 | return false; |
| 293 | } |
| 294 | } |
| 295 | return true; |
| 296 | } |
| 297 | |
| 298 | void GrGpu::releaseGeometryHelper() { |
| 299 | return; |
| 300 | } |
| 301 | |
| 302 | /////////////////////////////////////////////////////////////////////////////// |
| 303 | |
| 304 | const GrGpu::Stats& GrGpu::getStats() const { |
| 305 | return fStats; |
| 306 | } |
| 307 | |
| 308 | void GrGpu::resetStats() { |
| 309 | memset(&fStats, 0, sizeof(fStats)); |
| 310 | } |
| 311 | |
| 312 | void GrGpu::printStats() const { |
| 313 | if (GR_COLLECT_STATS) { |
| 314 | GrPrintf( |
| 315 | "-v-------------------------GPU STATS----------------------------v-\n" |
| 316 | "Stats collection is: %s\n" |
| 317 | "Draws: %04d, Verts: %04d, Indices: %04d\n" |
| 318 | "ProgChanges: %04d, TexChanges: %04d, RTChanges: %04d\n" |
| 319 | "TexCreates: %04d, RTCreates:%04d\n" |
| 320 | "-^--------------------------------------------------------------^-\n", |
| 321 | (GR_COLLECT_STATS ? "ON" : "OFF"), |
| 322 | fStats.fDrawCnt, fStats.fVertexCnt, fStats.fIndexCnt, |
| 323 | fStats.fProgChngCnt, fStats.fTextureChngCnt, fStats.fRenderTargetChngCnt, |
| 324 | fStats.fTextureCreateCnt, fStats.fRenderTargetCreateCnt); |
| 325 | } |
| 326 | } |
| 327 | |
| 328 | //////////////////////////////////////////////////////////////////////////////// |
| 329 | |
| 330 | GrTexture::~GrTexture() { |
| 331 | // use this to set a break-point if needed |
| 332 | // Gr_clz(3); |
| 333 | } |
| 334 | |
| 335 | const GrSamplerState GrSamplerState::gClampNoFilter( |
| 336 | GrSamplerState::kClamp_WrapMode, |
| 337 | GrSamplerState::kClamp_WrapMode, |
| 338 | GrSamplerState::kNormal_SampleMode, |
| 339 | false); |
| 340 | |
| 341 | |
| 342 | |
| 343 | |