2 * Copyright 2014 Google Inc.
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
9 #include "sk_tool_utils.h"
13 #include "SkTextBlob.h"
14 #include "SkTDArray.h"
24 const struct BlobCfg {
28 } blobConfigs[][3][3] = {
30 { { 1024, kDefault_Pos, 1 }, { 0, kDefault_Pos, 0 }, { 0, kDefault_Pos, 0 } },
31 { { 1024, kScalar_Pos, 1 }, { 0, kScalar_Pos, 0 }, { 0, kScalar_Pos, 0 } },
32 { { 1024, kPoint_Pos, 1 }, { 0, kPoint_Pos, 0 }, { 0, kPoint_Pos, 0 } },
35 { { 4, kDefault_Pos, 1 }, { 4, kDefault_Pos, 1 }, { 4, kDefault_Pos, 1 } },
36 { { 4, kScalar_Pos, 1 }, { 4, kScalar_Pos, 1 }, { 4, kScalar_Pos, 1 } },
37 { { 4, kPoint_Pos, 1 }, { 4, kPoint_Pos, 1 }, { 4, kPoint_Pos, 1 } },
41 { { 4, kDefault_Pos, 1 }, { 4, kDefault_Pos, 1 }, { 4, kScalar_Pos, 1 } },
42 { { 4, kScalar_Pos, 1 }, { 4, kScalar_Pos, 1 }, { 4, kPoint_Pos, 1 } },
43 { { 4, kPoint_Pos, 1 }, { 4, kPoint_Pos, 1 }, { 4, kDefault_Pos, 1 } },
47 { { 4, kDefault_Pos, 1 }, { 4, kScalar_Pos, 1 }, { 4, kPoint_Pos, 1 } },
48 { { 4, kScalar_Pos, 1 }, { 4, kPoint_Pos, 1 }, { 4, kDefault_Pos, 1 } },
49 { { 4, kPoint_Pos, 1 }, { 4, kDefault_Pos, 1 }, { 4, kScalar_Pos, 1 } },
53 { { 4, kDefault_Pos, .75f }, { 4, kDefault_Pos, 1 }, { 4, kScalar_Pos, 1.25f } },
54 { { 4, kScalar_Pos, .75f }, { 4, kScalar_Pos, 1 }, { 4, kPoint_Pos, 1.25f } },
55 { { 4, kPoint_Pos, .75f }, { 4, kPoint_Pos, 1 }, { 4, kDefault_Pos, 1.25f } },
59 { { 4, kDefault_Pos, 1 }, { 4, kScalar_Pos, .75f }, { 4, kPoint_Pos, 1.25f } },
60 { { 4, kScalar_Pos, 1 }, { 4, kPoint_Pos, .75f }, { 4, kDefault_Pos, 1.25f } },
61 { { 4, kPoint_Pos, 1 }, { 4, kDefault_Pos, .75f }, { 4, kScalar_Pos, 1.25f } },
65 const SkScalar kFontSize = 16;
68 class TextBlobGM : public skiagm::GM {
70 TextBlobGM(const char* txt)
75 void onOnceBeforeDraw() override {
76 fTypeface = sk_tool_utils::create_portable_typeface("serif", SkFontStyle());
78 p.setTypeface(fTypeface);
79 size_t txtLen = strlen(fText);
80 int glyphCount = p.textToGlyphs(fText, txtLen, nullptr);
82 fGlyphs.append(glyphCount);
83 p.textToGlyphs(fText, txtLen, fGlyphs.begin());
86 SkString onShortName() override {
87 return SkString("textblob");
90 SkISize onISize() override {
91 return SkISize::Make(640, 480);
94 void onDraw(SkCanvas* canvas) override {
95 for (unsigned b = 0; b < SK_ARRAY_COUNT(blobConfigs); ++b) {
96 sk_sp<SkTextBlob> blob(this->makeBlob(b));
99 SkPoint offset = SkPoint::Make(SkIntToScalar(10 + 300 * (b % 2)),
100 SkIntToScalar(20 + 150 * (b / 2)));
102 canvas->drawTextBlob(blob, offset.x(), offset.y(), p);
104 p.setColor(SK_ColorBLUE);
105 p.setStyle(SkPaint::kStroke_Style);
106 SkRect box = blob->bounds();
108 canvas->drawRect(box, p);
114 sk_sp<SkTextBlob> makeBlob(unsigned blobIndex) {
115 SkTextBlobBuilder builder;
118 font.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
119 font.setAntiAlias(true);
120 font.setSubpixelText(true);
121 font.setTypeface(fTypeface);
123 for (unsigned l = 0; l < SK_ARRAY_COUNT(blobConfigs[blobIndex]); ++l) {
124 unsigned currentGlyph = 0;
126 for (unsigned c = 0; c < SK_ARRAY_COUNT(blobConfigs[blobIndex][l]); ++c) {
127 const BlobCfg* cfg = &blobConfigs[blobIndex][l][c];
128 unsigned count = cfg->count;
130 if (count > fGlyphs.count() - currentGlyph) {
131 count = fGlyphs.count() - currentGlyph;
137 font.setTextSize(kFontSize * cfg->scale);
138 const SkScalar advanceX = font.getTextSize() * 0.85f;
139 const SkScalar advanceY = font.getTextSize() * 1.5f;
141 SkPoint offset = SkPoint::Make(currentGlyph * advanceX + c * advanceX,
145 const SkTextBlobBuilder::RunBuffer& buf = builder.allocRun(font, count,
148 memcpy(buf.glyphs, fGlyphs.begin() + currentGlyph, count * sizeof(uint16_t));
151 const SkTextBlobBuilder::RunBuffer& buf = builder.allocRunPosH(font, count,
153 SkTDArray<SkScalar> pos;
154 for (unsigned i = 0; i < count; ++i) {
155 *pos.append() = offset.x() + i * advanceX;
158 memcpy(buf.glyphs, fGlyphs.begin() + currentGlyph, count * sizeof(uint16_t));
159 memcpy(buf.pos, pos.begin(), count * sizeof(SkScalar));
162 const SkTextBlobBuilder::RunBuffer& buf = builder.allocRunPos(font, count);
164 SkTDArray<SkScalar> pos;
165 for (unsigned i = 0; i < count; ++i) {
166 *pos.append() = offset.x() + i * advanceX;
167 *pos.append() = offset.y() + i * (advanceY / count);
170 memcpy(buf.glyphs, fGlyphs.begin() + currentGlyph, count * sizeof(uint16_t));
171 memcpy(buf.pos, pos.begin(), count * sizeof(SkScalar) * 2);
174 SK_ABORT("unhandled pos value");
177 currentGlyph += count;
181 return builder.make();
184 SkTDArray<uint16_t> fGlyphs;
185 sk_sp<SkTypeface> fTypeface;
187 typedef skiagm::GM INHERITED;
190 DEF_GM(return new TextBlobGM("hamburgefons");)