blob: 14ef8aca34e779406132bd6bdef2d195489a91c5 [file] [log] [blame]
/*
* Copyright 2018 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/SkFontMetrics.h"
#include "include/core/SkFontTypes.h"
#include "include/core/SkPaint.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkScalar.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkTextBlob.h"
#include "include/core/SkTypeface.h"
#include "src/base/SkUTF.h"
#include "tools/ToolUtils.h"
#include <string.h>
#include <initializer_list>
static sk_sp<SkTextBlob> make_hpos_test_blob_utf8(const char* text, const SkFont& font) {
constexpr SkTextEncoding enc = SkTextEncoding::kUTF8;
SkTextBlobBuilder builder;
size_t len = strlen(text);
int glyphCount = font.countText(text, len, enc);
const auto& buffer = builder.allocRunPosH(font, glyphCount, 0);
(void)font.textToGlyphs(text, len, enc, buffer.glyphs, glyphCount);
font.getXPos(buffer.glyphs, glyphCount, buffer.pos);
return builder.make();
}
namespace skiagm {
class ScaledEmojiGM : public GM {
public:
ScaledEmojiGM() { }
protected:
struct EmojiFont {
sk_sp<SkTypeface> fTypeface;
const char* fText;
} fEmojiFont;
void onOnceBeforeDraw() override {
fEmojiFont.fTypeface = ToolUtils::emoji_typeface();
fEmojiFont.fText = ToolUtils::emoji_sample_text();
}
SkString onShortName() override {
return SkString("scaledemoji");
}
SkISize onISize() override { return SkISize::Make(1200, 1200); }
void onDraw(SkCanvas* canvas) override {
canvas->drawColor(SK_ColorGRAY);
SkPaint paint;
SkFont font(fEmojiFont.fTypeface);
font.setEdging(SkFont::Edging::kAlias);
const char* text = fEmojiFont.fText;
// draw text at different point sizes
// Testing GPU bitmap path, SDF path with no scaling,
// SDF path with scaling, path rendering with scaling
SkFontMetrics metrics;
SkScalar y = 0;
for (SkScalar textSize : { 70, 180, 270, 340 }) {
font.setSize(textSize);
font.getMetrics(&metrics);
y += -metrics.fAscent;
canvas->drawSimpleText(text, strlen(text), SkTextEncoding::kUTF8, 10, y, font, paint);
y += metrics.fDescent + metrics.fLeading;
}
}
private:
using INHERITED = GM;
};
class ScaledEmojiPosGM : public GM {
public:
ScaledEmojiPosGM() {}
protected:
struct EmojiFont {
sk_sp<SkTypeface> fTypeface;
const char* fText;
} fEmojiFont;
void onOnceBeforeDraw() override {
fEmojiFont.fTypeface = ToolUtils::emoji_typeface();
fEmojiFont.fText = ToolUtils::emoji_sample_text();
}
SkString onShortName() override {
return SkString("scaledemojipos");
}
SkISize onISize() override { return SkISize::Make(1200, 1200); }
void onDraw(SkCanvas* canvas) override {
canvas->drawColor(SK_ColorGRAY);
SkPaint paint;
SkFont font;
font.setTypeface(fEmojiFont.fTypeface);
const char* text = fEmojiFont.fText;
// draw text at different point sizes
// Testing GPU bitmap path, SDF path with no scaling,
// SDF path with scaling, path rendering with scaling
SkFontMetrics metrics;
SkScalar y = 0;
for (SkScalar textSize : { 70, 180, 270, 340 }) {
font.setSize(textSize);
font.getMetrics(&metrics);
y += -metrics.fAscent;
sk_sp<SkTextBlob> blob = make_hpos_test_blob_utf8(text, font);
// Draw with an origin.
canvas->drawTextBlob(blob, 10, y, paint);
// Draw with shifted canvas.
canvas->save();
canvas->translate(750, 0);
canvas->drawTextBlob(blob, 10, y, paint);
canvas->restore();
y += metrics.fDescent + metrics.fLeading;
}
}
private:
using INHERITED = GM;
};
class ScaledEmojiPerspectiveGM : public GM {
public:
ScaledEmojiPerspectiveGM() {}
protected:
struct EmojiFont {
sk_sp<SkTypeface> fTypeface;
SkString fText;
} fEmojiFont;
void onOnceBeforeDraw() override {
fEmojiFont.fTypeface = ToolUtils::emoji_typeface();
int count = 0;
const char* ch_ptr = ToolUtils::emoji_sample_text();
const char* ch_end = ch_ptr + strlen(ch_ptr);
while (ch_ptr < ch_end && count < 2) {
SkUnichar ch = SkUTF::NextUTF8(&ch_ptr, ch_end);
if (ch != ' ') {
fEmojiFont.fText.appendUnichar(ch);
++count;
}
}
}
SkString onShortName() override {
return SkString("scaledemojiperspective");
}
SkISize onISize() override { return SkISize::Make(1200, 1200); }
void onDraw(SkCanvas* canvas) override {
canvas->drawColor(SK_ColorGRAY);
SkMatrix taper;
taper.setPerspY(-0.0025f);
SkPaint paint;
SkFont font;
font.setTypeface(fEmojiFont.fTypeface);
font.setSize(40);
sk_sp<SkTextBlob> blob = make_hpos_test_blob_utf8(fEmojiFont.fText.c_str(), font);
// draw text at different point sizes
// Testing GPU bitmap path, SDF path with no scaling,
// SDF path with scaling, path rendering with scaling
SkFontMetrics metrics;
font.getMetrics(&metrics);
for (auto rotate : {0.0, 45.0, 90.0, 135.0, 180.0, 225.0, 270.0, 315.0}) {
canvas->save();
SkMatrix perspective;
perspective.postTranslate(-600, -600);
perspective.postConcat(taper);
perspective.postRotate(rotate);
perspective.postTranslate(600, 600);
canvas->concat(perspective);
SkScalar y = 670;
for (int i = 0; i < 5; i++) {
y += -metrics.fAscent;
// Draw with an origin.
canvas->drawTextBlob(blob, 565, y, paint);
y += metrics.fDescent + metrics.fLeading;
}
canvas->restore();
}
}
private:
using INHERITED = GM;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM(return new ScaledEmojiGM;)
DEF_GM(return new ScaledEmojiPosGM;)
DEF_GM(return new ScaledEmojiPerspectiveGM;)
} // namespace skiagm