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- /*
- * Copyright 2014 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "gm/gm.h"
- #include "include/core/SkCanvas.h"
- #include "include/core/SkColor.h"
- #include "include/core/SkFont.h"
- #include "include/core/SkFontTypes.h"
- #include "include/core/SkPaint.h"
- #include "include/core/SkPoint.h"
- #include "include/core/SkRefCnt.h"
- #include "include/core/SkScalar.h"
- #include "include/core/SkShader.h"
- #include "include/core/SkSize.h"
- #include "include/core/SkString.h"
- #include "include/core/SkTextBlob.h"
- #include "include/core/SkTileMode.h"
- #include "include/core/SkTypeface.h"
- #include "include/core/SkTypes.h"
- #include "include/effects/SkGradientShader.h"
- #include "include/private/SkTDArray.h"
- #include "tools/ToolUtils.h"
- #include <math.h>
- #include <string.h>
- // This GM exercises drawTextBlob offset vs. shader space behavior.
- class TextBlobShaderGM : public skiagm::GM {
- public:
- TextBlobShaderGM() {}
- private:
- void onOnceBeforeDraw() override {
- {
- SkFont font(ToolUtils::create_portable_typeface());
- const char* txt = "Blobber";
- size_t txtLen = strlen(txt);
- fGlyphs.append(font.countText(txt, txtLen, SkTextEncoding::kUTF8));
- font.textToGlyphs(txt, txtLen, SkTextEncoding::kUTF8, fGlyphs.begin(), fGlyphs.count());
- }
- SkFont font;
- font.setSubpixel(true);
- font.setEdging(SkFont::Edging::kAntiAlias);
- font.setSize(30);
- font.setTypeface(ToolUtils::create_portable_typeface());
- SkTextBlobBuilder builder;
- int glyphCount = fGlyphs.count();
- const SkTextBlobBuilder::RunBuffer* run;
- run = &builder.allocRun(font, glyphCount, 10, 10, nullptr);
- memcpy(run->glyphs, fGlyphs.begin(), glyphCount * sizeof(uint16_t));
- run = &builder.allocRunPosH(font, glyphCount, 80, nullptr);
- memcpy(run->glyphs, fGlyphs.begin(), glyphCount * sizeof(uint16_t));
- for (int i = 0; i < glyphCount; ++i) {
- run->pos[i] = font.getSize() * i * .75f;
- }
- run = &builder.allocRunPos(font, glyphCount, nullptr);
- memcpy(run->glyphs, fGlyphs.begin(), glyphCount * sizeof(uint16_t));
- for (int i = 0; i < glyphCount; ++i) {
- run->pos[i * 2] = font.getSize() * i * .75f;
- run->pos[i * 2 + 1] = 150 + 5 * sinf((float)i * 8 / glyphCount);
- }
- fBlob = builder.make();
- SkColor colors[2];
- colors[0] = SK_ColorRED;
- colors[1] = SK_ColorGREEN;
- SkScalar pos[SK_ARRAY_COUNT(colors)];
- for (unsigned i = 0; i < SK_ARRAY_COUNT(pos); ++i) {
- pos[i] = (float)i / (SK_ARRAY_COUNT(pos) - 1);
- }
- SkISize sz = this->onISize();
- fShader = SkGradientShader::MakeRadial(SkPoint::Make(SkIntToScalar(sz.width() / 2),
- SkIntToScalar(sz.height() / 2)),
- sz.width() * .66f, colors, pos,
- SK_ARRAY_COUNT(colors),
- SkTileMode::kRepeat);
- }
- SkString onShortName() override {
- return SkString("textblobshader");
- }
- SkISize onISize() override {
- return SkISize::Make(640, 480);
- }
- void onDraw(SkCanvas* canvas) override {
- SkPaint p;
- p.setAntiAlias(true);
- p.setStyle(SkPaint::kFill_Style);
- p.setShader(fShader);
- SkISize sz = this->onISize();
- constexpr int kXCount = 4;
- constexpr int kYCount = 3;
- for (int i = 0; i < kXCount; ++i) {
- for (int j = 0; j < kYCount; ++j) {
- canvas->drawTextBlob(fBlob,
- SkIntToScalar(i * sz.width() / kXCount),
- SkIntToScalar(j * sz.height() / kYCount),
- p);
- }
- }
- }
- SkTDArray<uint16_t> fGlyphs;
- sk_sp<SkTextBlob> fBlob;
- sk_sp<SkShader> fShader;
- typedef skiagm::GM INHERITED;
- };
- DEF_GM(return new TextBlobShaderGM;)
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