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151 lines
4.1 KiB
151 lines
4.1 KiB
/*
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* Copyright 2018 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm.h"
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#include "sk_tool_utils.h"
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#include "Resources.h"
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#include "SkCanvas.h"
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#include "SkFontMetrics.h"
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#include "SkStream.h"
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#include "SkTextBlob.h"
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#include "SkTo.h"
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#include "SkTypeface.h"
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static sk_sp<SkTextBlob> make_hpos_test_blob_utf8(const char* text, const SkFont& font) {
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constexpr SkTextEncoding enc = SkTextEncoding::kUTF8;
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SkTextBlobBuilder builder;
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size_t len = strlen(text);
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int glyphCount = font.countText(text, len, enc);
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const auto& buffer = builder.allocRunPosH(font, glyphCount, 0);
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(void)font.textToGlyphs(text, len, enc, buffer.glyphs, glyphCount);
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font.getXPos(buffer.glyphs, glyphCount, buffer.pos);
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return builder.make();
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}
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namespace skiagm {
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class ScaledEmojiGM : public GM {
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public:
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ScaledEmojiGM() { }
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protected:
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struct EmojiFont {
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sk_sp<SkTypeface> fTypeface;
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const char* fText;
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} fEmojiFont;
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void onOnceBeforeDraw() override {
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fEmojiFont.fTypeface = sk_tool_utils::emoji_typeface();
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fEmojiFont.fText = sk_tool_utils::emoji_sample_text();
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}
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SkString onShortName() override {
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SkString name("scaledemoji");
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name.append(sk_tool_utils::platform_font_manager());
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return name;
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}
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SkISize onISize() override { return SkISize::Make(1200, 1200); }
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void onDraw(SkCanvas* canvas) override {
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canvas->drawColor(SK_ColorGRAY);
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SkPaint paint;
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SkFont font(fEmojiFont.fTypeface);
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font.setEdging(SkFont::Edging::kAlias);
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const char* text = fEmojiFont.fText;
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// draw text at different point sizes
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// Testing GPU bitmap path, SDF path with no scaling,
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// SDF path with scaling, path rendering with scaling
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SkFontMetrics metrics;
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SkScalar y = 0;
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for (SkScalar textSize : { 70, 180, 270, 340 }) {
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font.setSize(textSize);
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font.getMetrics(&metrics);
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y += -metrics.fAscent;
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canvas->drawSimpleText(text, strlen(text), kUTF8_SkTextEncoding, 10, y, font, paint);
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y += metrics.fDescent + metrics.fLeading;
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}
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}
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private:
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typedef GM INHERITED;
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};
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class ScaledEmojiPosGM : public GM {
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public:
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ScaledEmojiPosGM() {}
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protected:
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struct EmojiFont {
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sk_sp<SkTypeface> fTypeface;
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const char* fText;
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} fEmojiFont;
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void onOnceBeforeDraw() override {
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fEmojiFont.fTypeface = sk_tool_utils::emoji_typeface();
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fEmojiFont.fText = sk_tool_utils::emoji_sample_text();
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}
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SkString onShortName() override {
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SkString name("scaledemojipos");
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name.append(sk_tool_utils::platform_font_manager());
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return name;
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}
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SkISize onISize() override { return SkISize::Make(1200, 1200); }
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void onDraw(SkCanvas* canvas) override {
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canvas->drawColor(SK_ColorGRAY);
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SkPaint paint;
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SkFont font;
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font.setTypeface(fEmojiFont.fTypeface);
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const char* text = fEmojiFont.fText;
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// draw text at different point sizes
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// Testing GPU bitmap path, SDF path with no scaling,
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// SDF path with scaling, path rendering with scaling
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SkFontMetrics metrics;
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SkScalar y = 0;
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for (SkScalar textSize : { 70, 180, 270, 340 }) {
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font.setSize(textSize);
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font.getMetrics(&metrics);
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y += -metrics.fAscent;
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sk_sp<SkTextBlob> blob = make_hpos_test_blob_utf8(text, font);
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// Draw with an origin.
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canvas->drawTextBlob(blob, 10, y, paint);
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// Draw with shifted canvas.
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canvas->save();
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canvas->translate(750, 0);
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canvas->drawTextBlob(blob, 10, y, paint);
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canvas->restore();
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y += metrics.fDescent + metrics.fLeading;
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}
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}
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private:
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typedef GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM(return new ScaledEmojiGM;)
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DEF_GM(return new ScaledEmojiPosGM;)
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}
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