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| 1 /* | 1 /* |
| 2 * Copyright 2013 Google Inc. | 2 * Copyright 2013 Google Inc. |
| 3 * | 3 * |
| 4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
| 5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
| 6 */ | 6 */ |
| 7 | 7 |
| 8 #include "GrDistanceFieldTextContext.h" | 8 #include "GrDistanceFieldTextContext.h" |
| 9 #include "GrAtlas.h" | 9 #include "GrAtlas.h" |
| 10 #include "GrBitmapTextContext.h" | 10 #include "GrBitmapTextContext.h" |
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| 312 const char* lastText = text; | 312 const char* lastText = text; |
| 313 // the last 2 parameters are ignored | 313 // the last 2 parameters are ignored |
| 314 const SkGlyph& glyph = glyphCacheProc(cache, &text, 0, 0); | 314 const SkGlyph& glyph = glyphCacheProc(cache, &text, 0, 0); |
| 315 | 315 |
| 316 if (glyph.fWidth) { | 316 if (glyph.fWidth) { |
| 317 SkScalar x = offset.x() + pos[0]; | 317 SkScalar x = offset.x() + pos[0]; |
| 318 SkScalar y = offset.y() + (2 == scalarsPerPosition ? pos[1] : 0)
; | 318 SkScalar y = offset.y() + (2 == scalarsPerPosition ? pos[1] : 0)
; |
| 319 | 319 |
| 320 if (!this->appendGlyph(GrGlyph::Pack(glyph.getGlyphID(), | 320 if (!this->appendGlyph(GrGlyph::Pack(glyph.getGlyphID(), |
| 321 glyph.getSubXFixed(), | 321 glyph.getSubXFixed(), |
| 322 glyph.getSubYFixed()), | 322 glyph.getSubYFixed(), |
| 323 GrGlyph::kDistance_MaskStyl
e), |
| 323 x, y, fontScaler)) { | 324 x, y, fontScaler)) { |
| 324 // couldn't append, send to fallback | 325 // couldn't append, send to fallback |
| 325 fallbackTxt.push_back_n(SkToInt(text-lastText), lastText); | 326 fallbackTxt.push_back_n(SkToInt(text-lastText), lastText); |
| 326 fallbackPos.push_back(pos[0]); | 327 fallbackPos.push_back(pos[0]); |
| 327 if (2 == scalarsPerPosition) { | 328 if (2 == scalarsPerPosition) { |
| 328 fallbackPos.push_back(pos[1]); | 329 fallbackPos.push_back(pos[1]); |
| 329 } | 330 } |
| 330 } | 331 } |
| 331 } | 332 } |
| 332 pos += scalarsPerPosition; | 333 pos += scalarsPerPosition; |
| 333 } | 334 } |
| 334 } else { | 335 } else { |
| 335 SkScalar alignMul = SkPaint::kCenter_Align == fSkPaint.getTextAlign() ?
SK_ScalarHalf | 336 SkScalar alignMul = SkPaint::kCenter_Align == fSkPaint.getTextAlign() ?
SK_ScalarHalf |
| 336 :
SK_Scalar1; | 337 :
SK_Scalar1; |
| 337 while (text < stop) { | 338 while (text < stop) { |
| 338 const char* lastText = text; | 339 const char* lastText = text; |
| 339 // the last 2 parameters are ignored | 340 // the last 2 parameters are ignored |
| 340 const SkGlyph& glyph = glyphCacheProc(cache, &text, 0, 0); | 341 const SkGlyph& glyph = glyphCacheProc(cache, &text, 0, 0); |
| 341 | 342 |
| 342 if (glyph.fWidth) { | 343 if (glyph.fWidth) { |
| 343 SkScalar x = offset.x() + pos[0]; | 344 SkScalar x = offset.x() + pos[0]; |
| 344 SkScalar y = offset.y() + (2 == scalarsPerPosition ? pos[1] : 0)
; | 345 SkScalar y = offset.y() + (2 == scalarsPerPosition ? pos[1] : 0)
; |
| 345 | 346 |
| 346 SkScalar advanceX = SkFixedToScalar(glyph.fAdvanceX)*alignMul*fT
extRatio; | 347 SkScalar advanceX = SkFixedToScalar(glyph.fAdvanceX)*alignMul*fT
extRatio; |
| 347 SkScalar advanceY = SkFixedToScalar(glyph.fAdvanceY)*alignMul*fT
extRatio; | 348 SkScalar advanceY = SkFixedToScalar(glyph.fAdvanceY)*alignMul*fT
extRatio; |
| 348 | 349 |
| 349 if (!this->appendGlyph(GrGlyph::Pack(glyph.getGlyphID(), | 350 if (!this->appendGlyph(GrGlyph::Pack(glyph.getGlyphID(), |
| 350 glyph.getSubXFixed(), | 351 glyph.getSubXFixed(), |
| 351 glyph.getSubYFixed()), | 352 glyph.getSubYFixed(), |
| 353 GrGlyph::kDistance_MaskStyl
e), |
| 352 x - advanceX, y - advanceY, fontScaler))
{ | 354 x - advanceX, y - advanceY, fontScaler))
{ |
| 353 // couldn't append, send to fallback | 355 // couldn't append, send to fallback |
| 354 fallbackTxt.push_back_n(SkToInt(text-lastText), lastText); | 356 fallbackTxt.push_back_n(SkToInt(text-lastText), lastText); |
| 355 fallbackPos.push_back(pos[0]); | 357 fallbackPos.push_back(pos[0]); |
| 356 if (2 == scalarsPerPosition) { | 358 if (2 == scalarsPerPosition) { |
| 357 fallbackPos.push_back(pos[1]); | 359 fallbackPos.push_back(pos[1]); |
| 358 } | 360 } |
| 359 } | 361 } |
| 360 } | 362 } |
| 361 pos += scalarsPerPosition; | 363 pos += scalarsPerPosition; |
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| 502 // Returns true if this method handled the glyph, false if needs to be passed to
fallback | 504 // Returns true if this method handled the glyph, false if needs to be passed to
fallback |
| 503 // | 505 // |
| 504 bool GrDistanceFieldTextContext::appendGlyph(GrGlyph::PackedID packed, | 506 bool GrDistanceFieldTextContext::appendGlyph(GrGlyph::PackedID packed, |
| 505 SkScalar sx, SkScalar sy, | 507 SkScalar sx, SkScalar sy, |
| 506 GrFontScaler* scaler) { | 508 GrFontScaler* scaler) { |
| 507 if (NULL == fDrawTarget) { | 509 if (NULL == fDrawTarget) { |
| 508 return true; | 510 return true; |
| 509 } | 511 } |
| 510 | 512 |
| 511 if (NULL == fStrike) { | 513 if (NULL == fStrike) { |
| 512 fStrike = fContext->getFontCache()->getStrike(scaler, true); | 514 fStrike = fContext->getFontCache()->getStrike(scaler); |
| 513 } | 515 } |
| 514 | 516 |
| 515 GrGlyph* glyph = fStrike->getGlyph(packed, scaler); | 517 GrGlyph* glyph = fStrike->getGlyph(packed, scaler); |
| 516 if (NULL == glyph || glyph->fBounds.isEmpty()) { | 518 if (NULL == glyph || glyph->fBounds.isEmpty()) { |
| 517 return true; | 519 return true; |
| 518 } | 520 } |
| 519 | 521 |
| 520 // fallback to color glyph support | 522 // fallback to color glyph support |
| 521 if (kA8_GrMaskFormat != glyph->fMaskFormat) { | 523 if (kA8_GrMaskFormat != glyph->fMaskFormat) { |
| 522 return false; | 524 return false; |
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| 718 } | 720 } |
| 719 } | 721 } |
| 720 | 722 |
| 721 inline void GrDistanceFieldTextContext::finish() { | 723 inline void GrDistanceFieldTextContext::finish() { |
| 722 this->flush(); | 724 this->flush(); |
| 723 fTotalVertexCount = 0; | 725 fTotalVertexCount = 0; |
| 724 | 726 |
| 725 GrTextContext::finish(); | 727 GrTextContext::finish(); |
| 726 } | 728 } |
| 727 | 729 |
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