reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame^] | 1 | #include "SkGLDevice.h" |
| 2 | #include "SkGL.h" |
| 3 | #include "SkDrawProcs.h" |
| 4 | #include "SkRegion.h" |
| 5 | #include "SkThread.h" |
| 6 | |
| 7 | static void TRACE_DRAW(const char func[], SkGLDevice* device, |
| 8 | const SkDraw& draw) { |
| 9 | // SkDebugf("--- <%s> %p %p\n", func, canvas, draw.fDevice); |
| 10 | } |
| 11 | |
| 12 | struct SkGLDrawProcs : public SkDrawProcs { |
| 13 | public: |
| 14 | void init(const SkRegion* clip, int height) { |
| 15 | fCurrQuad = 0; |
| 16 | fCurrTexture = 0; |
| 17 | fClip = clip; |
| 18 | fViewportHeight = height; |
| 19 | |
| 20 | glEnableClientState(GL_TEXTURE_COORD_ARRAY); |
| 21 | glTexCoordPointer(2, SK_TextGLType, 0, fTexs); |
| 22 | glDisableClientState(GL_COLOR_ARRAY); |
| 23 | glVertexPointer(2, SK_TextGLType, 0, fVerts); |
| 24 | } |
| 25 | |
| 26 | GLenum texture() const { return fCurrTexture; } |
| 27 | |
| 28 | void flush() { |
| 29 | if (fCurrQuad && fCurrTexture) { |
| 30 | this->drawQuads(); |
| 31 | } |
| 32 | fCurrQuad = 0; |
| 33 | } |
| 34 | |
| 35 | void addQuad(GLuint texture, int x, int y, const SkGlyph& glyph, |
| 36 | SkFixed left, SkFixed right, SkFixed bottom) { |
| 37 | SkASSERT((size_t)fCurrQuad <= SK_ARRAY_COUNT(fVerts)); |
| 38 | |
| 39 | if (fCurrTexture != texture || fCurrQuad == SK_ARRAY_COUNT(fVerts)) { |
| 40 | if (fCurrQuad && fCurrTexture) { |
| 41 | this->drawQuads(); |
| 42 | } |
| 43 | fCurrQuad = 0; |
| 44 | fCurrTexture = texture; |
| 45 | } |
| 46 | |
| 47 | fVerts[fCurrQuad].setIRectFan(x, y, |
| 48 | x + glyph.fWidth, y + glyph.fHeight); |
| 49 | fTexs[fCurrQuad].setXRectFan(left, 0, right, bottom); |
| 50 | fCurrQuad += 4; |
| 51 | } |
| 52 | |
| 53 | void drawQuads(); |
| 54 | |
| 55 | private: |
| 56 | enum { |
| 57 | MAX_QUADS = 32 |
| 58 | }; |
| 59 | |
| 60 | SkGLTextVertex fVerts[MAX_QUADS * 4]; |
| 61 | SkGLTextVertex fTexs[MAX_QUADS * 4]; |
| 62 | |
| 63 | // these are initialized in setupForText |
| 64 | GLuint fCurrTexture; |
| 65 | int fCurrQuad; |
| 66 | int fViewportHeight; |
| 67 | const SkRegion* fClip; |
| 68 | }; |
| 69 | |
| 70 | /////////////////////////////////////////////////////////////////////////////// |
| 71 | |
| 72 | SkGLDevice::SkGLDevice(const SkBitmap& bitmap, bool offscreen) |
| 73 | : SkDevice(bitmap), fClipIter(bitmap.height()) { |
| 74 | fDrawProcs = NULL; |
| 75 | } |
| 76 | |
| 77 | SkGLDevice::~SkGLDevice() { |
| 78 | if (fDrawProcs) { |
| 79 | SkDELETE(fDrawProcs); |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | void SkGLDevice::setMatrixClip(const SkMatrix& matrix, const SkRegion& clip) { |
| 84 | this->INHERITED::setMatrixClip(matrix, clip); |
| 85 | |
| 86 | fGLMatrix.set(matrix); |
| 87 | fMatrix = matrix; |
| 88 | fClip = clip; |
| 89 | fDirty = true; |
| 90 | } |
| 91 | |
| 92 | SkGLDevice::TexOrientation SkGLDevice::bindDeviceAsTexture() { |
| 93 | return kNo_TexOrientation; |
| 94 | } |
| 95 | |
| 96 | void SkGLDevice::gainFocus(SkCanvas* canvas) { |
| 97 | this->INHERITED::gainFocus(canvas); |
| 98 | |
| 99 | const int w = this->width(); |
| 100 | const int h = this->height(); |
| 101 | glViewport(0, 0, w, h); |
| 102 | glMatrixMode(GL_PROJECTION); |
| 103 | glLoadIdentity(); |
| 104 | SkGL::Ortho(0, w, h, 0, -1, 1); |
| 105 | glMatrixMode(GL_MODELVIEW); |
| 106 | fDirty = true; |
| 107 | } |
| 108 | |
| 109 | SkGLClipIter* SkGLDevice::updateMatrixClip() { |
| 110 | bool useIter = false; |
| 111 | |
| 112 | // first handle the clip |
| 113 | if (fDirty || !fClip.isRect()) { |
| 114 | fClipIter.reset(fClip); |
| 115 | useIter = true; |
| 116 | } else if (fDirty) { |
| 117 | // no iter means caller is not respecting complex clips :( |
| 118 | SkGL::Scissor(fClip.getBounds(), this->height()); |
| 119 | } |
| 120 | // else we're just a rect, and we've already call scissor |
| 121 | |
| 122 | // now handle the matrix |
| 123 | if (fDirty) { |
| 124 | MAKE_GL(glLoadMatrix)(fGLMatrix.fMat); |
| 125 | #if 0 |
| 126 | SkDebugf("--- gldevice update matrix %p %p\n", this, fFBO); |
| 127 | for (int y = 0; y < 4; y++) { |
| 128 | SkDebugf(" [ "); |
| 129 | for (int x = 0; x < 4; x++) { |
| 130 | SkDebugf("%g ", fGLMatrix.fMat[y*4 + x]); |
| 131 | } |
| 132 | SkDebugf("]\n"); |
| 133 | } |
| 134 | #endif |
| 135 | fDirty = false; |
| 136 | } |
| 137 | |
| 138 | return useIter ? &fClipIter : NULL; |
| 139 | } |
| 140 | |
| 141 | /////////////////////////////////////////////////////////////////////////////// |
| 142 | |
| 143 | // must be in the same order as SkXfermode::Coeff in SkXfermode.h |
| 144 | SkGLDevice::AutoPaintShader::AutoPaintShader(SkGLDevice* device, |
| 145 | const SkPaint& paint) { |
| 146 | fDevice = device; |
| 147 | fTexCache = device->setupGLPaintShader(paint); |
| 148 | } |
| 149 | |
| 150 | SkGLDevice::AutoPaintShader::~AutoPaintShader() { |
| 151 | if (fTexCache) { |
| 152 | SkGLDevice::UnlockTexCache(fTexCache); |
| 153 | } |
| 154 | } |
| 155 | |
| 156 | SkGLDevice::TexCache* SkGLDevice::setupGLPaintShader(const SkPaint& paint) { |
| 157 | SkGL::SetPaint(paint); |
| 158 | |
| 159 | SkShader* shader = paint.getShader(); |
| 160 | if (NULL == shader) { |
| 161 | return NULL; |
| 162 | } |
| 163 | |
| 164 | if (!shader->setContext(this->accessBitmap(false), paint, this->matrix())) { |
| 165 | return NULL; |
| 166 | } |
| 167 | |
| 168 | SkBitmap bitmap; |
| 169 | SkMatrix matrix; |
| 170 | SkShader::TileMode tileModes[2]; |
| 171 | if (!shader->asABitmap(&bitmap, &matrix, tileModes)) { |
| 172 | return NULL; |
| 173 | } |
| 174 | |
| 175 | bitmap.lockPixels(); |
| 176 | if (!bitmap.readyToDraw()) { |
| 177 | return NULL; |
| 178 | } |
| 179 | |
| 180 | // see if we've already cached the bitmap from the shader |
| 181 | SkPoint max; |
| 182 | GLuint name; |
| 183 | TexCache* cache = SkGLDevice::LockTexCache(bitmap, &name, &max); |
| 184 | // the lock has already called glBindTexture for us |
| 185 | SkGL::SetTexParams(paint.isFilterBitmap(), tileModes[0], tileModes[1]); |
| 186 | |
| 187 | // since our texture coords will be in local space, we wack the texture |
| 188 | // matrix to map them back into 0...1 before we load it |
| 189 | SkMatrix localM; |
| 190 | if (shader->getLocalMatrix(&localM)) { |
| 191 | SkMatrix inverse; |
| 192 | if (localM.invert(&inverse)) { |
| 193 | matrix.preConcat(inverse); |
| 194 | } |
| 195 | } |
| 196 | |
| 197 | matrix.postScale(max.fX / bitmap.width(), max.fY / bitmap.height()); |
| 198 | glMatrixMode(GL_TEXTURE); |
| 199 | SkGL::LoadMatrix(matrix); |
| 200 | glMatrixMode(GL_MODELVIEW); |
| 201 | |
| 202 | // since we're going to use a shader/texture, we don't want the color, |
| 203 | // just its alpha |
| 204 | SkGL::SetAlpha(paint.getAlpha()); |
| 205 | // report that we have setup the texture |
| 206 | return cache; |
| 207 | } |
| 208 | |
| 209 | /////////////////////////////////////////////////////////////////////////////// |
| 210 | /////////////////////////////////////////////////////////////////////////////// |
| 211 | |
| 212 | void SkGLDevice::drawPaint(const SkDraw& draw, const SkPaint& paint) { |
| 213 | TRACE_DRAW("coreDrawPaint", this, draw); |
| 214 | |
| 215 | AutoPaintShader shader(this, paint); |
| 216 | SkGLVertex vertex[4]; |
| 217 | const SkGLVertex* texs = shader.useTex() ? vertex : NULL; |
| 218 | |
| 219 | // set vert to be big enough to fill the space, but not super-huge, to we |
| 220 | // don't overflow fixed-point implementations |
| 221 | { |
| 222 | SkRect r; |
| 223 | r.set(this->clip().getBounds()); |
| 224 | SkMatrix inverse; |
| 225 | if (draw.fMatrix->invert(&inverse)) { |
| 226 | inverse.mapRect(&r); |
| 227 | } |
| 228 | vertex->setRectFan(r); |
| 229 | } |
| 230 | |
| 231 | SkGL::DrawVertices(4, GL_TRIANGLE_FAN, vertex, texs, NULL, NULL, |
| 232 | this->updateMatrixClip()); |
| 233 | } |
| 234 | |
| 235 | static const GLenum gPointMode2GL[] = { |
| 236 | GL_POINTS, |
| 237 | GL_LINES, |
| 238 | GL_LINE_STRIP |
| 239 | }; |
| 240 | |
| 241 | void SkGLDevice::drawPoints(const SkDraw& draw, SkCanvas::PointMode mode, |
| 242 | size_t count, const SkPoint pts[], const SkPaint& paint) { |
| 243 | TRACE_DRAW("coreDrawPoints", this, draw); |
| 244 | |
| 245 | SkScalar width = paint.getStrokeWidth(); |
| 246 | if (width < 0) { |
| 247 | return; |
| 248 | } |
| 249 | |
| 250 | /* We should really only use drawverts for hairlines, since gl and skia |
| 251 | treat the thickness differently... |
| 252 | */ |
| 253 | |
| 254 | AutoPaintShader shader(this, paint); |
| 255 | |
| 256 | if (width <= 0) { |
| 257 | width = SK_Scalar1; |
| 258 | } |
| 259 | |
| 260 | if (SkCanvas::kPoints_PointMode == mode) { |
| 261 | glPointSize(SkScalarToFloat(width)); |
| 262 | } else { |
| 263 | glLineWidth(SkScalarToFloat(width)); |
| 264 | } |
| 265 | |
| 266 | const SkGLVertex* verts; |
| 267 | |
| 268 | #if GLSCALAR_IS_SCALAR |
| 269 | verts = (const SkGLVertex*)pts; |
| 270 | #else |
| 271 | SkAutoSTMalloc<32, SkGLVertex> storage(count); |
| 272 | SkGLVertex* v = storage.get(); |
| 273 | |
| 274 | v->setPoints(pts, count); |
| 275 | verts = v; |
| 276 | #endif |
| 277 | |
| 278 | const SkGLVertex* texs = shader.useTex() ? verts : NULL; |
| 279 | |
| 280 | SkGL::DrawVertices(count, gPointMode2GL[mode], verts, texs, NULL, NULL, |
| 281 | this->updateMatrixClip()); |
| 282 | } |
| 283 | |
| 284 | void SkGLDevice::drawRect(const SkDraw& draw, const SkRect& rect, |
| 285 | const SkPaint& paint) { |
| 286 | TRACE_DRAW("coreDrawRect", this, draw); |
| 287 | |
| 288 | if (paint.getStyle() == SkPaint::kStroke_Style) { |
| 289 | return; |
| 290 | } |
| 291 | |
| 292 | if (paint.getStrokeJoin() != SkPaint::kMiter_Join) { |
| 293 | SkPath path; |
| 294 | path.addRect(rect); |
| 295 | this->drawPath(draw, path, paint); |
| 296 | return; |
| 297 | } |
| 298 | |
| 299 | AutoPaintShader shader(this, paint); |
| 300 | |
| 301 | SkGLVertex vertex[4]; |
| 302 | vertex->setRectFan(rect); |
| 303 | const SkGLVertex* texs = shader.useTex() ? vertex : NULL; |
| 304 | |
| 305 | SkGL::DrawVertices(4, GL_TRIANGLE_FAN, vertex, texs, NULL, NULL, |
| 306 | this->updateMatrixClip()); |
| 307 | } |
| 308 | |
| 309 | void SkGLDevice::drawPath(const SkDraw& draw, const SkPath& path, |
| 310 | const SkPaint& paint) { |
| 311 | TRACE_DRAW("coreDrawPath", this, draw); |
| 312 | if (paint.getStyle() == SkPaint::kStroke_Style) { |
| 313 | return; |
| 314 | } |
| 315 | |
| 316 | AutoPaintShader shader(this, paint); |
| 317 | |
| 318 | SkGL::FillPath(path, paint, shader.useTex(), this->updateMatrixClip()); |
| 319 | } |
| 320 | |
| 321 | void SkGLDevice::drawBitmap(const SkDraw& draw, const SkBitmap& bitmap, |
| 322 | const SkMatrix& m, const SkPaint& paint) { |
| 323 | TRACE_DRAW("coreDrawBitmap", this, draw); |
| 324 | |
| 325 | SkAutoLockPixels alp(bitmap); |
| 326 | if (!bitmap.readyToDraw()) { |
| 327 | return; |
| 328 | } |
| 329 | |
| 330 | SkGLClipIter* iter = this->updateMatrixClip(); |
| 331 | |
| 332 | SkPoint max; |
| 333 | GLenum name; |
| 334 | SkAutoLockTexCache(bitmap, &name, &max); |
| 335 | // the lock has already called glBindTexture for us |
| 336 | SkGL::SetTexParamsClamp(paint.isFilterBitmap()); |
| 337 | |
| 338 | glMatrixMode(GL_TEXTURE); |
| 339 | glLoadIdentity(); |
| 340 | glMatrixMode(GL_MODELVIEW); |
| 341 | glPushMatrix(); |
| 342 | SkGL::MultMatrix(m); |
| 343 | |
| 344 | SkGLVertex pts[4], tex[4]; |
| 345 | |
| 346 | pts->setIRectFan(0, 0, bitmap.width(), bitmap.height()); |
| 347 | tex->setRectFan(0, 0, max.fX, max.fY); |
| 348 | |
| 349 | // now draw the mesh |
| 350 | SkGL::SetPaintAlpha(paint); |
| 351 | glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); |
| 352 | |
| 353 | SkGL::DrawVertices(4, GL_TRIANGLE_FAN, pts, tex, NULL, NULL, iter); |
| 354 | |
| 355 | glPopMatrix(); |
| 356 | } |
| 357 | |
| 358 | // move this guy into SkGL, so we can call it from SkGLDevice |
| 359 | static void gl_drawSprite(int x, int y, int w, int h, const SkPoint& max, |
| 360 | const SkPaint& paint, SkGLClipIter* iter) { |
| 361 | SkGL::SetTexParamsClamp(false); |
| 362 | |
| 363 | glMatrixMode(GL_TEXTURE); |
| 364 | glLoadIdentity(); |
| 365 | glMatrixMode(GL_MODELVIEW); |
| 366 | glPushMatrix(); |
| 367 | glLoadIdentity(); |
| 368 | |
| 369 | SkGLVertex pts[4], tex[4]; |
| 370 | |
| 371 | // if h < 0, then the texture is bottom-to-top, but since our projection |
| 372 | // matrix always inverts Y, we have to re-invert our texture coord here |
| 373 | if (h < 0) { |
| 374 | h = -h; |
| 375 | tex->setRectFan(0, max.fY, max.fX, 0); |
| 376 | } else { |
| 377 | tex->setRectFan(0, 0, max.fX, max.fY); |
| 378 | } |
| 379 | pts->setIRectFan(x, y, x + w, y + h); |
| 380 | |
| 381 | SkGL::SetPaintAlpha(paint); |
| 382 | glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); |
| 383 | |
| 384 | // should look to use glDrawTexi() has we do for text... |
| 385 | SkGL::DrawVertices(4, GL_TRIANGLE_FAN, pts, tex, NULL, NULL, iter); |
| 386 | |
| 387 | glPopMatrix(); |
| 388 | } |
| 389 | |
| 390 | void SkGLDevice::drawSprite(const SkDraw& draw, const SkBitmap& bitmap, |
| 391 | int left, int top, const SkPaint& paint) { |
| 392 | TRACE_DRAW("coreDrawSprite", this, draw); |
| 393 | |
| 394 | SkAutoLockPixels alp(bitmap); |
| 395 | if (!bitmap.readyToDraw()) { |
| 396 | return; |
| 397 | } |
| 398 | |
| 399 | SkGLClipIter* iter = this->updateMatrixClip(); |
| 400 | |
| 401 | SkPoint max; |
| 402 | GLuint name; |
| 403 | SkAutoLockTexCache(bitmap, &name, &max); |
| 404 | |
| 405 | gl_drawSprite(left, top, bitmap.width(), bitmap.height(), max, paint, iter); |
| 406 | } |
| 407 | |
| 408 | void SkGLDevice::drawDevice(const SkDraw& draw, SkDevice* dev, |
| 409 | int x, int y, const SkPaint& paint) { |
| 410 | TRACE_DRAW("coreDrawDevice", this, draw); |
| 411 | |
| 412 | SkGLDevice::TexOrientation to = ((SkGLDevice*)dev)->bindDeviceAsTexture(); |
| 413 | if (SkGLDevice::kNo_TexOrientation != to) { |
| 414 | SkGLClipIter* iter = this->updateMatrixClip(); |
| 415 | |
| 416 | const SkBitmap& bm = dev->accessBitmap(false); |
| 417 | int w = bm.width(); |
| 418 | int h = bm.height(); |
| 419 | SkPoint max; |
| 420 | |
| 421 | max.set(SkFixedToScalar(w << (16 - SkNextLog2(bm.rowBytesAsPixels()))), |
| 422 | SkFixedToScalar(h << (16 - SkNextLog2(h)))); |
| 423 | |
| 424 | if (SkGLDevice::kBottomToTop_TexOrientation == to) { |
| 425 | h = -h; |
| 426 | } |
| 427 | gl_drawSprite(x, y, w, h, max, paint, iter); |
| 428 | } |
| 429 | } |
| 430 | |
| 431 | /////////////////////////////////////////////////////////////////////////////// |
| 432 | |
| 433 | static const GLenum gVertexModeToGL[] = { |
| 434 | GL_TRIANGLES, // kTriangles_VertexMode, |
| 435 | GL_TRIANGLE_STRIP, // kTriangleStrip_VertexMode, |
| 436 | GL_TRIANGLE_FAN // kTriangleFan_VertexMode |
| 437 | }; |
| 438 | |
| 439 | #include "SkShader.h" |
| 440 | |
| 441 | void SkGLDevice::drawVertices(const SkDraw& draw, SkCanvas::VertexMode vmode, |
| 442 | int vertexCount, const SkPoint vertices[], |
| 443 | const SkPoint texs[], const SkColor colors[], |
| 444 | SkXfermode* xmode, |
| 445 | const uint16_t indices[], int indexCount, |
| 446 | const SkPaint& paint) { |
| 447 | |
| 448 | if (false) { |
| 449 | SkRect bounds; |
| 450 | SkIRect ibounds; |
| 451 | |
| 452 | bounds.set(vertices, vertexCount); |
| 453 | bounds.round(&ibounds); |
| 454 | |
| 455 | SkDebugf("---- drawverts: %d pts, texs=%d colors=%d indices=%d bounds [%d %d]\n", |
| 456 | vertexCount, texs!=0, colors!=0, indexCount, ibounds.width(), ibounds.height()); |
| 457 | } |
| 458 | |
| 459 | SkGLClipIter* iter = this->updateMatrixClip(); |
| 460 | |
| 461 | SkGL::SetPaint(paint); |
| 462 | |
| 463 | const SkGLVertex* glVerts; |
| 464 | const SkGLVertex* glTexs = NULL; |
| 465 | |
| 466 | #if GLSCALAR_IS_SCALAR |
| 467 | glVerts = (const SkGLVertex*)vertices; |
| 468 | #else |
| 469 | SkAutoSTMalloc<32, SkGLVertex> storage(vertexCount); |
| 470 | storage.get()->setPoints(vertices, vertexCount); |
| 471 | glVerts = storage.get(); |
| 472 | #endif |
| 473 | |
| 474 | uint8_t* colorArray = NULL; |
| 475 | if (colors) { |
| 476 | colorArray = (uint8_t*)sk_malloc_throw(vertexCount*4); |
| 477 | SkGL::SetRGBA(colorArray, colors, vertexCount); |
| 478 | } |
| 479 | SkAutoFree afca(colorArray); |
| 480 | |
| 481 | SkGLVertex* texArray = NULL; |
| 482 | TexCache* cache = NULL; |
| 483 | |
| 484 | if (texs && paint.getShader()) { |
| 485 | SkShader* shader = paint.getShader(); |
| 486 | |
| 487 | // if (!shader->setContext(this->accessBitmap(), paint, *draw.fMatrix)) { |
| 488 | if (!shader->setContext(*draw.fBitmap, paint, *draw.fMatrix)) { |
| 489 | goto DONE; |
| 490 | } |
| 491 | |
| 492 | SkBitmap bitmap; |
| 493 | SkMatrix matrix; |
| 494 | SkShader::TileMode tileModes[2]; |
| 495 | if (shader->asABitmap(&bitmap, &matrix, tileModes)) { |
| 496 | SkPoint max; |
| 497 | GLuint name; |
| 498 | cache = SkGLDevice::LockTexCache(bitmap, &name, &max); |
| 499 | if (NULL == cache) { |
| 500 | return; |
| 501 | } |
| 502 | |
| 503 | matrix.postScale(max.fX / bitmap.width(), max.fY / bitmap.height()); |
| 504 | glMatrixMode(GL_TEXTURE); |
| 505 | SkGL::LoadMatrix(matrix); |
| 506 | glMatrixMode(GL_MODELVIEW); |
| 507 | |
| 508 | #if GLSCALAR_IS_SCALAR |
| 509 | glTexs = (const SkGLVertex*)texs; |
| 510 | #else |
| 511 | texArray = (SkGLVertex*)sk_malloc_throw(vertexCount * sizeof(SkGLVertex)); |
| 512 | texArray->setPoints(texs, vertexCount); |
| 513 | glTexs = texArray; |
| 514 | #endif |
| 515 | |
| 516 | SkGL::SetPaintAlpha(paint); |
| 517 | SkGL::SetTexParams(paint.isFilterBitmap(), |
| 518 | tileModes[0], tileModes[1]); |
| 519 | } |
| 520 | } |
| 521 | DONE: |
| 522 | SkAutoFree aftex(texArray); |
| 523 | |
| 524 | SkGL::DrawVertices(indices ? indexCount : vertexCount, |
| 525 | gVertexModeToGL[vmode], |
| 526 | glVerts, glTexs, colorArray, indices, iter); |
| 527 | |
| 528 | if (cache) { |
| 529 | SkGLDevice::UnlockTexCache(cache); |
| 530 | } |
| 531 | } |
| 532 | |
| 533 | /////////////////////////////////////////////////////////////////////////////// |
| 534 | |
| 535 | #include "SkGlyphCache.h" |
| 536 | #include "SkGLTextCache.h" |
| 537 | |
| 538 | void SkGLDevice::GlyphCacheAuxProc(void* data) { |
| 539 | SkDebugf("-------------- delete text texture cache\n"); |
| 540 | SkDELETE((SkGLTextCache*)data); |
| 541 | } |
| 542 | |
| 543 | #ifdef SK_SCALAR_IS_FIXED |
| 544 | #define SkDiv16ToScalar(numer, denom) (SkIntToFixed(numer) / (denom)) |
| 545 | #else |
| 546 | #define SkDiv16ToScalar(numer, denom) SkScalarDiv(numer, denom) |
| 547 | #endif |
| 548 | |
| 549 | // stolen from SkDraw.cpp - D1G_NoBounder_RectClip |
| 550 | static void SkGL_Draw1Glyph(const SkDraw1Glyph& state, const SkGlyph& glyph, |
| 551 | int x, int y) { |
| 552 | SkASSERT(glyph.fWidth > 0 && glyph.fHeight > 0); |
| 553 | |
| 554 | SkGLDrawProcs* procs = (SkGLDrawProcs*)state.fDraw->fProcs; |
| 555 | |
| 556 | x += glyph.fLeft; |
| 557 | y += glyph.fTop; |
| 558 | |
| 559 | // check if we're clipped out (nothing to draw) |
| 560 | SkIRect bounds; |
| 561 | bounds.set(x, y, x + glyph.fWidth, y + glyph.fHeight); |
| 562 | if (!SkIRect::Intersects(state.fClip->getBounds(), bounds)) { |
| 563 | return; |
| 564 | } |
| 565 | |
| 566 | // now dig up our texture cache |
| 567 | |
| 568 | SkGlyphCache* gcache = state.fCache; |
| 569 | void* auxData; |
| 570 | SkGLTextCache* textCache = NULL; |
| 571 | |
| 572 | if (gcache->getAuxProcData(SkGLDevice::GlyphCacheAuxProc, &auxData)) { |
| 573 | textCache = (SkGLTextCache*)auxData; |
| 574 | } |
| 575 | if (NULL == textCache) { |
| 576 | // need to create one |
| 577 | textCache = SkNEW(SkGLTextCache); |
| 578 | gcache->setAuxProc(SkGLDevice::GlyphCacheAuxProc, textCache); |
| 579 | } |
| 580 | |
| 581 | int offset; |
| 582 | SkGLTextCache::Strike* strike = textCache->findGlyph(glyph, &offset); |
| 583 | if (NULL == strike) { |
| 584 | // make sure the glyph has an image |
| 585 | uint8_t* aa = (uint8_t*)glyph.fImage; |
| 586 | if (NULL == aa) { |
| 587 | aa = (uint8_t*)gcache->findImage(glyph); |
| 588 | if (NULL == aa) { |
| 589 | return; // can't rasterize glyph |
| 590 | } |
| 591 | } |
| 592 | strike = textCache->addGlyphAndBind(glyph, aa, &offset); |
| 593 | if (NULL == strike) { |
| 594 | // too big to cache, need to draw as is... |
| 595 | return; |
| 596 | } |
| 597 | } |
| 598 | |
| 599 | const int shiftW = strike->widthShift(); |
| 600 | const int shiftH = strike->heightShift(); |
| 601 | |
| 602 | SkFixed left = offset << (16 - shiftW); |
| 603 | SkFixed right = (offset + glyph.fWidth) << (16 - shiftW); |
| 604 | SkFixed bottom = glyph.fHeight << (16 - shiftH); |
| 605 | |
| 606 | procs->addQuad(strike->texture(), x, y, glyph, left, right, bottom); |
| 607 | } |
| 608 | |
| 609 | #if 1 |
| 610 | // matches the orientation used in SkGL::setRectFan. Too bad we can't rely on |
| 611 | // QUADS in android's GL |
| 612 | static const uint8_t gQuadIndices[] = { |
| 613 | 0, 1, 2, 0, 2, 3, |
| 614 | 4, 5, 6, 4, 6, 7, |
| 615 | 8, 9, 10, 8, 10, 11, |
| 616 | 12, 13, 14, 12, 14, 15, |
| 617 | 16, 17, 18, 16, 18, 19, |
| 618 | 20, 21, 22, 20, 22, 23, |
| 619 | 24, 25, 26, 24, 26, 27, |
| 620 | 28, 29, 30, 28, 30, 31, |
| 621 | 32, 33, 34, 32, 34, 35, |
| 622 | 36, 37, 38, 36, 38, 39, |
| 623 | 40, 41, 42, 40, 42, 43, |
| 624 | 44, 45, 46, 44, 46, 47, |
| 625 | 48, 49, 50, 48, 50, 51, |
| 626 | 52, 53, 54, 52, 54, 55, |
| 627 | 56, 57, 58, 56, 58, 59, |
| 628 | 60, 61, 62, 60, 62, 63, |
| 629 | 64, 65, 66, 64, 66, 67, |
| 630 | 68, 69, 70, 68, 70, 71, |
| 631 | 72, 73, 74, 72, 74, 75, |
| 632 | 76, 77, 78, 76, 78, 79, |
| 633 | 80, 81, 82, 80, 82, 83, |
| 634 | 84, 85, 86, 84, 86, 87, |
| 635 | 88, 89, 90, 88, 90, 91, |
| 636 | 92, 93, 94, 92, 94, 95, |
| 637 | 96, 97, 98, 96, 98, 99, |
| 638 | 100, 101, 102, 100, 102, 103, |
| 639 | 104, 105, 106, 104, 106, 107, |
| 640 | 108, 109, 110, 108, 110, 111, |
| 641 | 112, 113, 114, 112, 114, 115, |
| 642 | 116, 117, 118, 116, 118, 119, |
| 643 | 120, 121, 122, 120, 122, 123, |
| 644 | 124, 125, 126, 124, 126, 127 |
| 645 | }; |
| 646 | #else |
| 647 | static void generateQuadIndices(int n) { |
| 648 | int index = 0; |
| 649 | for (int i = 0; i < n; i++) { |
| 650 | SkDebugf(" %3d, %3d, %3d, %3d, %3d, %3d,\n", |
| 651 | index, index + 1, index + 2, index, index + 2, index + 3); |
| 652 | index += 4; |
| 653 | } |
| 654 | } |
| 655 | #endif |
| 656 | |
| 657 | void SkGLDrawProcs::drawQuads() { |
| 658 | SkASSERT(SK_ARRAY_COUNT(gQuadIndices) == MAX_QUADS * 6); |
| 659 | |
| 660 | glBindTexture(GL_TEXTURE_2D, fCurrTexture); |
| 661 | |
| 662 | #if 0 |
| 663 | static bool gOnce; |
| 664 | if (!gOnce) { |
| 665 | generateQuadIndices(MAX_QUADS); |
| 666 | gOnce = true; |
| 667 | } |
| 668 | #endif |
| 669 | |
| 670 | // convert from quad vertex count to triangle vertex count |
| 671 | // 6/4 * n == n + (n >> 1) since n is always a multiple of 4 |
| 672 | SkASSERT((fCurrQuad & 3) == 0); |
| 673 | int count = fCurrQuad + (fCurrQuad >> 1); |
| 674 | |
| 675 | if (fClip->isComplex()) { |
| 676 | SkGLClipIter iter(fViewportHeight); |
| 677 | iter.reset(*fClip); |
| 678 | while (!iter.done()) { |
| 679 | iter.scissor(); |
| 680 | glDrawElements(GL_TRIANGLES, count, GL_UNSIGNED_BYTE, gQuadIndices); |
| 681 | iter.next(); |
| 682 | } |
| 683 | } else { |
| 684 | glDrawElements(GL_TRIANGLES, count, GL_UNSIGNED_BYTE, gQuadIndices); |
| 685 | } |
| 686 | } |
| 687 | |
| 688 | void SkGLDevice::setupForText(SkDraw* draw, const SkPaint& paint) { |
| 689 | // we handle complex clips in the SkDraw common code, so we don't check |
| 690 | // for it here |
| 691 | this->updateMatrixClip(); |
| 692 | |
| 693 | SkGL::SetPaint(paint, false); |
| 694 | |
| 695 | glMatrixMode(GL_TEXTURE); |
| 696 | glLoadIdentity(); |
| 697 | |
| 698 | glMatrixMode(GL_MODELVIEW); |
| 699 | glPushMatrix(); |
| 700 | glLoadIdentity(); |
| 701 | |
| 702 | // deferred allocation |
| 703 | if (NULL == fDrawProcs) { |
| 704 | fDrawProcs = SkNEW(SkGLDrawProcs); |
| 705 | fDrawProcs->fD1GProc = SkGL_Draw1Glyph; |
| 706 | } |
| 707 | |
| 708 | // init our (and GL's) state |
| 709 | fDrawProcs->init(draw->fClip, this->height()); |
| 710 | // assign to the caller's SkDraw |
| 711 | draw->fProcs = fDrawProcs; |
| 712 | |
| 713 | glEnable(GL_TEXTURE_2D); |
| 714 | glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); |
| 715 | glShadeModel(GL_FLAT); |
| 716 | } |
| 717 | |
| 718 | void SkGLDevice::drawText(const SkDraw& draw, const void* text, |
| 719 | size_t byteLength, SkScalar x, SkScalar y, |
| 720 | const SkPaint& paint) { |
| 721 | /* Currently, perspective text is draw via paths, invoked directly by |
| 722 | SkDraw. This can't work for us, since the bitmap that our draw points |
| 723 | to has no pixels, so we just abort if we're in perspective. |
| 724 | |
| 725 | Better fix would be to... |
| 726 | - have a callback inside draw to handle path drawing |
| 727 | - option to have draw call the font cache, which we could patch (?) |
| 728 | */ |
| 729 | if (draw.fMatrix->getType() & SkMatrix::kPerspective_Mask) { |
| 730 | return; |
| 731 | } |
| 732 | |
| 733 | SkDraw myDraw(draw); |
| 734 | this->setupForText(&myDraw, paint); |
| 735 | this->INHERITED::drawText(myDraw, text, byteLength, x, y, paint); |
| 736 | fDrawProcs->flush(); |
| 737 | glPopMatrix(); // GL_MODELVIEW |
| 738 | } |
| 739 | |
| 740 | void SkGLDevice::drawPosText(const SkDraw& draw, const void* text, |
| 741 | size_t byteLength, const SkScalar pos[], |
| 742 | SkScalar constY, int scalarsPerPos, |
| 743 | const SkPaint& paint) { |
| 744 | if (draw.fMatrix->getType() & SkMatrix::kPerspective_Mask) { |
| 745 | return; |
| 746 | } |
| 747 | |
| 748 | SkDraw myDraw(draw); |
| 749 | this->setupForText(&myDraw, paint); |
| 750 | this->INHERITED::drawPosText(myDraw, text, byteLength, pos, constY, |
| 751 | scalarsPerPos, paint); |
| 752 | fDrawProcs->flush(); |
| 753 | glPopMatrix(); // GL_MODELVIEW |
| 754 | } |
| 755 | |
| 756 | void SkGLDevice::drawTextOnPath(const SkDraw& draw, const void* text, |
| 757 | size_t byteLength, const SkPath& path, |
| 758 | const SkMatrix* m, const SkPaint& paint) { |
| 759 | // not supported yet |
| 760 | } |
| 761 | |