/* * Copyright 2011 Google Inc. * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #include "gm.h" #include "SkBlurMask.h" #include "SkBlurMaskFilter.h" #include "SkReadBuffer.h" #include "SkTextBlob.h" #include "SkWriteBuffer.h" #include "SkLayerRasterizer.h" static void r0(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) { p.setMaskFilter(SkBlurMaskFilter::Make(kNormal_SkBlurStyle, SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(3)))); rastBuilder->addLayer(p, SkIntToScalar(3), SkIntToScalar(3)); p.setMaskFilter(nullptr); p.setStyle(SkPaint::kStroke_Style); p.setStrokeWidth(SK_Scalar1); rastBuilder->addLayer(p); p.setAlpha(0x11); p.setStyle(SkPaint::kFill_Style); p.setBlendMode(SkBlendMode::kSrc); rastBuilder->addLayer(p); } static void r1(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) { rastBuilder->addLayer(p); p.setAlpha(0x40); p.setBlendMode(SkBlendMode::kSrc); p.setStyle(SkPaint::kStroke_Style); p.setStrokeWidth(SK_Scalar1*2); rastBuilder->addLayer(p); } static void r2(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) { p.setStyle(SkPaint::kStrokeAndFill_Style); p.setStrokeWidth(SK_Scalar1*4); rastBuilder->addLayer(p); p.setStyle(SkPaint::kStroke_Style); p.setStrokeWidth(SK_Scalar1*3/2); p.setBlendMode(SkBlendMode::kClear); rastBuilder->addLayer(p); } static void r3(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) { p.setStyle(SkPaint::kStroke_Style); p.setStrokeWidth(SK_Scalar1*3); rastBuilder->addLayer(p); p.setAlpha(0x20); p.setStyle(SkPaint::kFill_Style); p.setBlendMode(SkBlendMode::kSrc); rastBuilder->addLayer(p); } static void r4(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) { p.setAlpha(0x60); rastBuilder->addLayer(p, SkIntToScalar(3), SkIntToScalar(3)); p.setAlpha(0xFF); p.setBlendMode(SkBlendMode::kClear); rastBuilder->addLayer(p, SK_Scalar1*3/2, SK_Scalar1*3/2); p.setBlendMode(SkBlendMode::kSrcOver); rastBuilder->addLayer(p); } #include "SkDiscretePathEffect.h" static void r5(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) { rastBuilder->addLayer(p); p.setPathEffect(SkDiscretePathEffect::Make(SK_Scalar1*4, SK_Scalar1*3)); p.setBlendMode(SkBlendMode::kSrcOut); rastBuilder->addLayer(p); } static void r6(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) { rastBuilder->addLayer(p); p.setAntiAlias(false); SkLayerRasterizer::Builder rastBuilder2; r5(&rastBuilder2, p); p.setRasterizer(rastBuilder2.detach()); p.setBlendMode(SkBlendMode::kClear); rastBuilder->addLayer(p); } #include "Sk2DPathEffect.h" static sk_sp<SkPathEffect> MakeDotEffect(SkScalar radius, const SkMatrix& matrix) { SkPath path; path.addCircle(0, 0, radius); return SkPath2DPathEffect::Make(matrix, path); } static void r7(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) { SkMatrix lattice; lattice.setScale(SK_Scalar1*6, SK_Scalar1*6, 0, 0); lattice.postSkew(SK_Scalar1/3, 0, 0, 0); p.setPathEffect(MakeDotEffect(SK_Scalar1*4, lattice)); rastBuilder->addLayer(p); } static void r8(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) { rastBuilder->addLayer(p); SkMatrix lattice; lattice.setScale(SK_Scalar1*6, SK_Scalar1*6, 0, 0); lattice.postSkew(SK_Scalar1/3, 0, 0, 0); p.setPathEffect(MakeDotEffect(SK_Scalar1*2, lattice)); p.setBlendMode(SkBlendMode::kClear); rastBuilder->addLayer(p); p.setPathEffect(nullptr); p.setBlendMode(SkBlendMode::kSrcOver); p.setStyle(SkPaint::kStroke_Style); p.setStrokeWidth(SK_Scalar1); rastBuilder->addLayer(p); } static void r9(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) { rastBuilder->addLayer(p); SkMatrix lattice; lattice.setScale(SK_Scalar1, SK_Scalar1*6, 0, 0); lattice.postRotate(SkIntToScalar(30), 0, 0); p.setPathEffect(SkLine2DPathEffect::Make(SK_Scalar1*2, lattice)); p.setBlendMode(SkBlendMode::kClear); rastBuilder->addLayer(p); p.setPathEffect(nullptr); p.setBlendMode(SkBlendMode::kSrcOver); p.setStyle(SkPaint::kStroke_Style); p.setStrokeWidth(SK_Scalar1); rastBuilder->addLayer(p); } typedef void (*raster_proc)(SkLayerRasterizer::Builder*, SkPaint&); constexpr raster_proc gRastProcs[] = { r0, r1, r2, r3, r4, r5, r6, r7, r8, r9 }; #include "SkXfermode.h" static void apply_shader(SkPaint* paint, int index) { raster_proc proc = gRastProcs[index]; if (proc) { SkPaint p; SkLayerRasterizer::Builder rastBuilder; p.setAntiAlias(true); proc(&rastBuilder, p); paint->setRasterizer(rastBuilder.detach()); } #if 0 SkScalar dir[] = { SK_Scalar1, SK_Scalar1, SK_Scalar1 }; paint->setMaskFilter(SkBlurMaskFilter::CreateEmboss(dir, SK_Scalar1/4, SkIntToScalar(4), SkIntToScalar(3)))->unref(); #endif paint->setColor(SK_ColorBLUE); } DEF_SIMPLE_GM(texteffects, canvas, 460, 680) { canvas->save(); SkPaint paint; paint.setAntiAlias(true); sk_tool_utils::set_portable_typeface(&paint); paint.setTextSize(SkIntToScalar(56)); SkScalar x = SkIntToScalar(20); SkScalar y = paint.getTextSize(); SkString str("Hamburgefons"); for (int i = 0; i < static_cast<int>(SK_ARRAY_COUNT(gRastProcs)); i++) { apply_shader(&paint, i); // paint.setMaskFilter(nullptr); // paint.setColor(SK_ColorBLACK); canvas->drawText(str.c_str(), str.size(), x, y, paint); y += paint.getFontSpacing(); } canvas->restore(); } DEF_SIMPLE_GM(textunderstrike, canvas, 460, 680) { canvas->clear(SK_ColorYELLOW); SkPaint paint; sk_tool_utils::set_portable_typeface(&paint); paint.setTextSize(50); paint.setStrokeWidth(5); paint.setAntiAlias(true); auto drawText = [&]() { paint.setStyle(SkPaint::kFill_Style); canvas->drawText("Hello", 5, 100, 50, paint); paint.setStyle(SkPaint::kStroke_Style); canvas->drawText("Hello", 5, 100, 100, paint); canvas->translate(0, 100); }; drawText(); paint.setUnderlineText(true); drawText(); paint.setUnderlineText(false); paint.setStrikeThruText(true); drawText(); paint.setUnderlineText(true); drawText(); paint.setColor(SK_ColorWHITE); paint.setStyle(SkPaint::kStroke_Style); canvas->drawText("Hello", 5, 100, 50, paint); paint.setColor(SK_ColorBLUE); paint.setStyle(SkPaint::kFill_Style); canvas->drawText("Hello", 5, 100, 50, paint); } static SkPath create_underline(const SkTDArray<SkScalar>& intersections, SkScalar last, SkScalar finalPos, SkScalar uPos, SkScalar uWidth, SkScalar textSize) { SkPath underline; SkScalar end = last; for (int index = 0; index < intersections.count(); index += 2) { SkScalar start = intersections[index] - uWidth;; end = intersections[index + 1] + uWidth; if (start > last && last + textSize / 12 < start) { underline.moveTo(last, uPos); underline.lineTo(start, uPos); } last = end; } if (end < finalPos) { underline.moveTo(end, uPos); underline.lineTo(finalPos, uPos); } return underline; } static void find_intercepts(const char* test, size_t len, SkScalar x, SkScalar y, const SkPaint& paint, SkScalar uWidth, SkTDArray<SkScalar>* intersections) { SkScalar uPos = y + uWidth; SkScalar bounds[2] = { uPos - uWidth / 2, uPos + uWidth / 2 }; int count = paint.getTextIntercepts(test, len, x, y, bounds, nullptr); SkASSERT(!(count % 2)); if (count) { intersections->setCount(count); paint.getTextIntercepts(test, len, x, y, bounds, intersections->begin()); } } DEF_SIMPLE_GM(fancyunderline, canvas, 900, 1350) { SkPaint paint; paint.setAntiAlias(true); const char* fam[] = { "sans-serif", "serif", "monospace" }; const char test[] = "aAjJgGyY_|{-(~[,]qQ}pP}zZ"; SkPoint textPt = { 10, 80 }; for (size_t font = 0; font < SK_ARRAY_COUNT(fam); ++font) { sk_tool_utils::set_portable_typeface(&paint, fam[font]); for (SkScalar textSize = 100; textSize > 10; textSize -= 20) { paint.setTextSize(textSize); const SkScalar uWidth = textSize / 15; paint.setStrokeWidth(uWidth); paint.setStyle(SkPaint::kFill_Style); canvas->drawText(test, sizeof(test) - 1, textPt.fX, textPt.fY, paint); SkTDArray<SkScalar> intersections; find_intercepts(test, sizeof(test) - 1, textPt.fX, textPt.fY, paint, uWidth, &intersections); SkScalar start = textPt.fX; SkScalar end = paint.measureText(test, sizeof(test) - 1) + textPt.fX; SkScalar uPos = textPt.fY + uWidth; SkPath underline = create_underline(intersections, start, end, uPos, uWidth, textSize); paint.setStyle(SkPaint::kStroke_Style); canvas->drawPath(underline, paint); canvas->translate(0, textSize * 1.3f); } canvas->translate(0, 60); } } static void find_intercepts(const char* test, size_t len, const SkPoint* pos, const SkPaint& paint, SkScalar uWidth, SkTDArray<SkScalar>* intersections) { SkScalar uPos = pos[0].fY + uWidth; SkScalar bounds[2] = { uPos - uWidth / 2, uPos + uWidth / 2 }; int count = paint.getPosTextIntercepts(test, len, pos, bounds, nullptr); SkASSERT(!(count % 2)); if (count) { intersections->setCount(count); paint.getPosTextIntercepts(test, len, pos, bounds, intersections->begin()); } } DEF_SIMPLE_GM(fancyposunderline, canvas, 900, 1350) { SkPaint paint; paint.setAntiAlias(true); const char* fam[] = { "sans-serif", "serif", "monospace" }; const char test[] = "aAjJgGyY_|{-(~[,]qQ}pP}zZ"; SkPoint textPt = { 10, 80 }; for (size_t font = 0; font < SK_ARRAY_COUNT(fam); ++font) { sk_tool_utils::set_portable_typeface(&paint, fam[font]); for (SkScalar textSize = 100; textSize > 10; textSize -= 20) { paint.setTextSize(textSize); const SkScalar uWidth = textSize / 15; paint.setStrokeWidth(uWidth); paint.setStyle(SkPaint::kFill_Style); int widthCount = paint.getTextWidths(test, sizeof(test) - 1, nullptr); SkTDArray<SkScalar> widths; widths.setCount(widthCount); (void) paint.getTextWidths(test, sizeof(test) - 1, widths.begin()); SkTDArray<SkPoint> pos; pos.setCount(widthCount); SkScalar posX = textPt.fX; for (int index = 0; index < widthCount; ++index) { pos[index].fX = posX; posX += widths[index]; pos[index].fY = textPt.fY + (textSize / 25) * (index % 4); } canvas->drawPosText(test, sizeof(test) - 1, pos.begin(), paint); SkTDArray<SkScalar> intersections; find_intercepts(test, sizeof(test) - 1, pos.begin(), paint, uWidth, &intersections); SkScalar start = textPt.fX; SkScalar end = posX; SkScalar uPos = textPt.fY + uWidth; SkPath underline = create_underline(intersections, start, end, uPos, uWidth, textSize); paint.setStyle(SkPaint::kStroke_Style); canvas->drawPath(underline, paint); canvas->translate(0, textSize * 1.3f); } canvas->translate(0, 60); } } namespace { sk_sp<SkTextBlob> MakeFancyBlob(const SkPaint& paint, const char* text) { SkPaint blobPaint(paint); const size_t textLen = strlen(text); const int glyphCount = blobPaint.textToGlyphs(text, textLen, nullptr); SkAutoTArray<SkGlyphID> glyphs(glyphCount); blobPaint.textToGlyphs(text, textLen, glyphs.get()); blobPaint.setTextEncoding(SkPaint::kGlyphID_TextEncoding); const size_t glyphTextBytes = SkTo<uint32_t>(glyphCount) * sizeof(SkGlyphID); const int widthCount = blobPaint.getTextWidths(glyphs.get(), glyphTextBytes, nullptr); SkAssertResult(widthCount == glyphCount); SkAutoTArray<SkScalar> widths(glyphCount); blobPaint.getTextWidths(glyphs.get(), glyphTextBytes, widths.get()); SkTextBlobBuilder blobBuilder; int glyphIndex = 0; SkScalar advance = 0; // Default-positioned run. { const int defaultRunLen = glyphCount / 3; const SkTextBlobBuilder::RunBuffer& buf = blobBuilder.allocRun(blobPaint, defaultRunLen, advance, 0); memcpy(buf.glyphs, glyphs.get(), SkTo<uint32_t>(defaultRunLen) * sizeof(SkGlyphID)); for (int i = 0; i < defaultRunLen; ++i) { advance += widths[glyphIndex++]; } } // Horizontal-positioned run. { const int horizontalRunLen = glyphCount / 3; const SkTextBlobBuilder::RunBuffer& buf = blobBuilder.allocRunPosH(blobPaint, horizontalRunLen, 0); memcpy(buf.glyphs, glyphs.get() + glyphIndex, SkTo<uint32_t>(horizontalRunLen) * sizeof(SkGlyphID)); for (int i = 0; i < horizontalRunLen; ++i) { buf.pos[i] = advance; advance += widths[glyphIndex++]; } } // Full-positioned run. { const int fullRunLen = glyphCount - glyphIndex; const SkTextBlobBuilder::RunBuffer& buf = blobBuilder.allocRunPos(blobPaint, fullRunLen); memcpy(buf.glyphs, glyphs.get() + glyphIndex, SkTo<uint32_t>(fullRunLen) * sizeof(SkGlyphID)); for (int i = 0; i < fullRunLen; ++i) { buf.pos[i * 2 + 0] = advance; // x offset buf.pos[i * 2 + 1] = 0; // y offset advance += widths[glyphIndex++]; } } return blobBuilder.make(); } } // anonymous ns DEF_SIMPLE_GM(fancyblobunderline, canvas, 1480, 1380) { SkPaint paint; paint.setAntiAlias(true); const char* fam[] = { "sans-serif", "serif", "monospace" }; const char test[] = "aAjJgGyY_|{-(~[,]qQ}pP}zZ"; const SkPoint blobOffset = { 10, 80 }; for (size_t font = 0; font < SK_ARRAY_COUNT(fam); ++font) { sk_tool_utils::set_portable_typeface(&paint, fam[font]); for (SkScalar textSize = 100; textSize > 10; textSize -= 20) { paint.setTextSize(textSize); const SkScalar uWidth = textSize / 15; paint.setStrokeWidth(uWidth); paint.setStyle(SkPaint::kFill_Style); sk_sp<SkTextBlob> blob = MakeFancyBlob(paint, test); canvas->drawTextBlob(blob, blobOffset.x(), blobOffset.y(), paint); const SkScalar uPos = uWidth; const SkScalar bounds[2] = { uPos - uWidth / 2, uPos + uWidth / 2 }; const int interceptCount = paint.getTextBlobIntercepts(blob.get(), bounds, nullptr); SkASSERT(!(interceptCount % 2)); SkTDArray<SkScalar> intercepts; intercepts.setCount(interceptCount); paint.getTextBlobIntercepts(blob.get(), bounds, intercepts.begin()); const SkScalar start = blob->bounds().left(); const SkScalar end = blob->bounds().right(); SkPath underline = create_underline(intercepts, start, end, uPos, uWidth, textSize); underline.offset(blobOffset.x(), blobOffset.y()); paint.setStyle(SkPaint::kStroke_Style); canvas->drawPath(underline, paint); canvas->translate(0, textSize * 1.3f); } canvas->translate(0, 60); } } DEF_SIMPLE_GM(fancyunderlinebars, canvas, 1500, 460) { SkPaint paint; paint.setAntiAlias(true); const char test[] = " .}]_ .}]_ .}]_ .}]_ .}]_ .}]_ .}]_ .}]_ .}]_ .}]_ .}]_ .}]_ .}]_"; SkPoint textPt = { 10, 80 }; sk_tool_utils::set_portable_typeface(&paint, "serif"); for (SkScalar textSize = 100; textSize > 10; textSize -= 20) { paint.setTextSize(textSize); SkScalar uWidth = textSize / 15; paint.setStrokeWidth(uWidth); paint.setStyle(SkPaint::kFill_Style); int widthCount = paint.getTextWidths(test, sizeof(test) - 1, nullptr); SkTDArray<SkScalar> widths; widths.setCount(widthCount); (void) paint.getTextWidths(test, sizeof(test) - 1, widths.begin()); SkTDArray<SkPoint> pos; pos.setCount(widthCount); SkScalar posX = textPt.fX; pos[0] = textPt; posX += widths[0]; for (int index = 1; index < widthCount; ++index) { pos[index].fX = posX; posX += widths[index]; pos[index].fY = textPt.fY - (textSize / 50) * (index / 5) + textSize / 50 * 4; } canvas->drawPosText(test, sizeof(test) - 1, pos.begin(), paint); SkTDArray<SkScalar> intersections; find_intercepts(test, sizeof(test) - 1, pos.begin(), paint, uWidth, &intersections); SkScalar start = textPt.fX; SkScalar end = posX; SkScalar uPos = pos[0].fY + uWidth; SkPath underline = create_underline(intersections, start, end, uPos, uWidth, textSize); paint.setStyle(SkPaint::kStroke_Style); canvas->drawPath(underline, paint); canvas->translate(0, textSize * 1.3f); } }