skia2/gm/textblobcolortrans.cpp
Ben Wagner 7fde8e1728 IWYU for gms.
This almost gets gms to be iwyu clean. The last bit is around gm.cpp
and the tracing framework and its use of atomic. Will also need a way
of keeping things from regressing, which is difficult due to needing to
do this outside-in.

Change-Id: I1393531e99da8b0f1a29f55c53c86d53f459af7d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/211593
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
2019-05-02 17:48:53 +00:00

107 lines
3.2 KiB
C++

/*
* 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/SkFont.h"
#include "include/core/SkFontTypes.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/SkTextBlob.h"
#include "include/core/SkTypeface.h"
#include "include/core/SkTypes.h"
#include "tools/ToolUtils.h"
#include <string.h>
namespace skiagm {
class TextBlobColorTrans : public GM {
public:
// This gm tests that textblobs can be translated and have their colors regenerated
// correctly. With smaller atlas sizes, it can also trigger regeneration of texture coords on
// the GPU backend
TextBlobColorTrans() { }
protected:
void onOnceBeforeDraw() override {
SkTextBlobBuilder builder;
// make textblob
// Large text is used to trigger atlas eviction
SkFont font(ToolUtils::create_portable_typeface(), 256);
font.setEdging(SkFont::Edging::kAlias);
const char* text = "AB";
SkRect bounds;
font.measureText(text, strlen(text), kUTF8_SkTextEncoding, &bounds);
SkScalar yOffset = bounds.height();
ToolUtils::add_to_text_blob(&builder, text, font, 0, yOffset - 30);
// A8
font.setSize(28);
text = "The quick brown fox jumps over the lazy dog.";
font.measureText(text, strlen(text), kUTF8_SkTextEncoding, &bounds);
ToolUtils::add_to_text_blob(&builder, text, font, 0, yOffset - 8);
// build
fBlob = builder.make();
}
SkString onShortName() override {
return SkString("textblobcolortrans");
}
SkISize onISize() override {
return SkISize::Make(kWidth, kHeight);
}
void onDraw(SkCanvas* canvas) override {
canvas->drawColor(SK_ColorGRAY);
SkPaint paint;
canvas->translate(10, 40);
SkRect bounds = fBlob->bounds();
// Colors were chosen to map to pairs of canonical colors. The GPU Backend will cache A8
// Texture Blobs based on the canonical color they map to. Canonical colors are used to
// create masks. For A8 there are 8 of them.
SkColor colors[] = {SK_ColorCYAN, SK_ColorLTGRAY, SK_ColorYELLOW, SK_ColorWHITE};
size_t count = SK_ARRAY_COUNT(colors);
size_t colorIndex = 0;
for (int y = 0; y + SkScalarFloorToInt(bounds.height()) < kHeight;
y += SkScalarFloorToInt(bounds.height())) {
paint.setColor(colors[colorIndex++ % count]);
canvas->save();
canvas->translate(0, SkIntToScalar(y));
canvas->drawTextBlob(fBlob, 0, 0, paint);
canvas->restore();
}
}
private:
sk_sp<SkTextBlob> fBlob;
static constexpr int kWidth = 675;
static constexpr int kHeight = 1600;
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM(return new TextBlobColorTrans;)
}