blob: 122d6fd1e0f256adda9d50a85af92f8bcf10cee8 [file] [log] [blame]
/*
* Copyright 2015 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/SkColorSpace.h"
#include "include/core/SkFont.h"
#include "include/core/SkFontStyle.h"
#include "include/core/SkFontTypes.h"
#include "include/core/SkImageInfo.h"
#include "include/core/SkPaint.h"
#include "include/core/SkRect.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkScalar.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkSurface.h"
#include "include/core/SkSurfaceProps.h"
#include "include/core/SkTextBlob.h"
#include "include/core/SkTypeface.h"
#include "include/gpu/GrDirectContext.h"
#include "include/gpu/GrRecordingContext.h"
#include "tools/ToolUtils.h"
#include "tools/fonts/RandomScalerContext.h"
#include <string.h>
#include <utility>
namespace skiagm {
class TextBlobRandomFont : public GM {
public:
// This gm tests that textblobs can be translated and scaled with a font that returns random
// but deterministic masks
TextBlobRandomFont() { }
protected:
void onOnceBeforeDraw() override {
SkTextBlobBuilder builder;
const char* text = "The quick brown fox jumps over the lazy dog.";
SkPaint paint;
paint.setAntiAlias(true);
paint.setColor(SK_ColorMAGENTA);
// make textbloben
SkFont font;
font.setSize(32);
font.setEdging(SkFont::Edging::kSubpixelAntiAlias);
// Setup our random scaler context
auto typeface = ToolUtils::create_portable_typeface("sans-serif", SkFontStyle::Bold());
if (!typeface) {
typeface = SkTypeface::MakeDefault();
}
font.setTypeface(sk_make_sp<SkRandomTypeface>(std::move(typeface), paint, false));
SkScalar y = 0;
SkRect bounds;
font.measureText(text, strlen(text), SkTextEncoding::kUTF8, &bounds);
y -= bounds.fTop;
ToolUtils::add_to_text_blob(&builder, text, font, 0, y);
y += bounds.fBottom;
// A8
const char* bigtext1 = "The quick brown fox";
const char* bigtext2 = "jumps over the lazy dog.";
font.setSize(160);
font.setSubpixel(false);
font.setEdging(SkFont::Edging::kAntiAlias);
font.measureText(bigtext1, strlen(bigtext1), SkTextEncoding::kUTF8, &bounds);
y -= bounds.fTop;
ToolUtils::add_to_text_blob(&builder, bigtext1, font, 0, y);
y += bounds.fBottom;
font.measureText(bigtext2, strlen(bigtext2), SkTextEncoding::kUTF8, &bounds);
y -= bounds.fTop;
ToolUtils::add_to_text_blob(&builder, bigtext2, font, 0, y);
y += bounds.fBottom;
// color emoji
if (sk_sp<SkTypeface> origEmoji = ToolUtils::emoji_typeface()) {
font.setTypeface(sk_make_sp<SkRandomTypeface>(origEmoji, paint, false));
const char* emojiText = ToolUtils::emoji_sample_text();
font.measureText(emojiText, strlen(emojiText), SkTextEncoding::kUTF8, &bounds);
y -= bounds.fTop;
ToolUtils::add_to_text_blob(&builder, emojiText, font, 0, y);
y += bounds.fBottom;
}
// build
fBlob = builder.make();
}
SkString onShortName() override {
return SkString("textblobrandomfont");
}
SkISize onISize() override {
return SkISize::Make(kWidth, kHeight);
}
DrawResult onDraw(SkCanvas* canvas, SkString* errorMsg) override {
if (!canvas->recordingContext()) {
*errorMsg = "Active context required to create SkSurface";
return DrawResult::kSkip;
}
auto dContext = GrAsDirectContext(canvas->recordingContext());
// This GM exists to test a specific feature of the GPU backend.
// This GM uses ToolUtils::makeSurface which doesn't work well with vias.
// This GM uses SkRandomTypeface which doesn't work well with serialization.
canvas->drawColor(SK_ColorWHITE);
SkImageInfo info = SkImageInfo::Make(kWidth, kHeight, canvas->imageInfo().colorType(),
kPremul_SkAlphaType,
canvas->imageInfo().refColorSpace());
SkSurfaceProps props(0, kUnknown_SkPixelGeometry);
auto surface(ToolUtils::makeSurface(canvas, info, &props));
if (!surface) {
*errorMsg = "This test requires a surface";
return DrawResult::kFail;
}
SkPaint paint;
paint.setAntiAlias(true);
SkCanvas* surfaceCanvas = surface->getCanvas();
SkScalar stride = SkScalarCeilToScalar(fBlob->bounds().height());
SkScalar yOffset = 5;
canvas->save();
// Originally we would alternate between rotating and not to force blob regeneration,
// but that code seems to have rotted. Keeping the rotate to match the old GM as
// much as possible, and it seems like a reasonable stress test for transformed
// color emoji.
canvas->rotate(-0.05f);
canvas->drawTextBlob(fBlob, 10, yOffset, paint);
yOffset += stride;
canvas->restore();
// Rotate in the surface canvas, not the final canvas, to avoid aliasing
surfaceCanvas->rotate(-0.05f);
surfaceCanvas->drawTextBlob(fBlob, 10, yOffset, paint);
surface->draw(canvas, 0, 0);
yOffset += stride;
if (dContext) {
// free gpu resources and verify
dContext->freeGpuResources();
}
canvas->rotate(-0.05f);
canvas->drawTextBlob(fBlob, 10, yOffset, paint);
yOffset += stride;
return DrawResult::kOk;
}
private:
sk_sp<SkTextBlob> fBlob;
static constexpr int kWidth = 2000;
static constexpr int kHeight = 1600;
using INHERITED = GM;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM(return new TextBlobRandomFont;)
} // namespace skiagm