skia2/gm/textblob.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

204 lines
7.2 KiB
C++

/*
* 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/SkFontStyle.h"
#include "include/core/SkFontTypes.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPoint.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 "include/private/SkTDArray.h"
#include "tools/ToolUtils.h"
#include <cstring>
namespace {
enum Pos {
kDefault_Pos = 0,
kScalar_Pos = 1,
kPoint_Pos = 2,
};
const struct BlobCfg {
unsigned count;
Pos pos;
SkScalar scale;
} blobConfigs[][3][3] = {
{
{ { 1024, kDefault_Pos, 1 }, { 0, kDefault_Pos, 0 }, { 0, kDefault_Pos, 0 } },
{ { 1024, kScalar_Pos, 1 }, { 0, kScalar_Pos, 0 }, { 0, kScalar_Pos, 0 } },
{ { 1024, kPoint_Pos, 1 }, { 0, kPoint_Pos, 0 }, { 0, kPoint_Pos, 0 } },
},
{
{ { 4, kDefault_Pos, 1 }, { 4, kDefault_Pos, 1 }, { 4, kDefault_Pos, 1 } },
{ { 4, kScalar_Pos, 1 }, { 4, kScalar_Pos, 1 }, { 4, kScalar_Pos, 1 } },
{ { 4, kPoint_Pos, 1 }, { 4, kPoint_Pos, 1 }, { 4, kPoint_Pos, 1 } },
},
{
{ { 4, kDefault_Pos, 1 }, { 4, kDefault_Pos, 1 }, { 4, kScalar_Pos, 1 } },
{ { 4, kScalar_Pos, 1 }, { 4, kScalar_Pos, 1 }, { 4, kPoint_Pos, 1 } },
{ { 4, kPoint_Pos, 1 }, { 4, kPoint_Pos, 1 }, { 4, kDefault_Pos, 1 } },
},
{
{ { 4, kDefault_Pos, 1 }, { 4, kScalar_Pos, 1 }, { 4, kPoint_Pos, 1 } },
{ { 4, kScalar_Pos, 1 }, { 4, kPoint_Pos, 1 }, { 4, kDefault_Pos, 1 } },
{ { 4, kPoint_Pos, 1 }, { 4, kDefault_Pos, 1 }, { 4, kScalar_Pos, 1 } },
},
{
{ { 4, kDefault_Pos, .75f }, { 4, kDefault_Pos, 1 }, { 4, kScalar_Pos, 1.25f } },
{ { 4, kScalar_Pos, .75f }, { 4, kScalar_Pos, 1 }, { 4, kPoint_Pos, 1.25f } },
{ { 4, kPoint_Pos, .75f }, { 4, kPoint_Pos, 1 }, { 4, kDefault_Pos, 1.25f } },
},
{
{ { 4, kDefault_Pos, 1 }, { 4, kScalar_Pos, .75f }, { 4, kPoint_Pos, 1.25f } },
{ { 4, kScalar_Pos, 1 }, { 4, kPoint_Pos, .75f }, { 4, kDefault_Pos, 1.25f } },
{ { 4, kPoint_Pos, 1 }, { 4, kDefault_Pos, .75f }, { 4, kScalar_Pos, 1.25f } },
},
};
const SkScalar kFontSize = 16;
}
class TextBlobGM : public skiagm::GM {
public:
TextBlobGM(const char* txt)
: fText(txt) {
}
protected:
void onOnceBeforeDraw() override {
fTypeface = ToolUtils::create_portable_typeface("serif", SkFontStyle());
SkFont font(fTypeface);
size_t txtLen = strlen(fText);
int glyphCount = font.countText(fText, txtLen, kUTF8_SkTextEncoding);
fGlyphs.append(glyphCount);
font.textToGlyphs(fText, txtLen, kUTF8_SkTextEncoding, fGlyphs.begin(), glyphCount);
}
SkString onShortName() override {
return SkString("textblob");
}
SkISize onISize() override {
return SkISize::Make(640, 480);
}
void onDraw(SkCanvas* canvas) override {
for (unsigned b = 0; b < SK_ARRAY_COUNT(blobConfigs); ++b) {
sk_sp<SkTextBlob> blob(this->makeBlob(b));
SkPaint p;
p.setAntiAlias(true);
SkPoint offset = SkPoint::Make(SkIntToScalar(10 + 300 * (b % 2)),
SkIntToScalar(20 + 150 * (b / 2)));
canvas->drawTextBlob(blob, offset.x(), offset.y(), p);
p.setColor(SK_ColorBLUE);
p.setStyle(SkPaint::kStroke_Style);
SkRect box = blob->bounds();
box.offset(offset);
p.setAntiAlias(false);
canvas->drawRect(box, p);
}
}
private:
sk_sp<SkTextBlob> makeBlob(unsigned blobIndex) {
SkTextBlobBuilder builder;
SkFont font;
font.setSubpixel(true);
font.setEdging(SkFont::Edging::kAntiAlias);
font.setTypeface(fTypeface);
for (unsigned l = 0; l < SK_ARRAY_COUNT(blobConfigs[blobIndex]); ++l) {
unsigned currentGlyph = 0;
for (unsigned c = 0; c < SK_ARRAY_COUNT(blobConfigs[blobIndex][l]); ++c) {
const BlobCfg* cfg = &blobConfigs[blobIndex][l][c];
unsigned count = cfg->count;
if (count > fGlyphs.count() - currentGlyph) {
count = fGlyphs.count() - currentGlyph;
}
if (0 == count) {
break;
}
font.setSize(kFontSize * cfg->scale);
const SkScalar advanceX = font.getSize() * 0.85f;
const SkScalar advanceY = font.getSize() * 1.5f;
SkPoint offset = SkPoint::Make(currentGlyph * advanceX + c * advanceX,
advanceY * l);
switch (cfg->pos) {
case kDefault_Pos: {
const SkTextBlobBuilder::RunBuffer& buf = builder.allocRun(font, count,
offset.x(),
offset.y());
memcpy(buf.glyphs, fGlyphs.begin() + currentGlyph, count * sizeof(uint16_t));
} break;
case kScalar_Pos: {
const SkTextBlobBuilder::RunBuffer& buf = builder.allocRunPosH(font, count,
offset.y());
SkTDArray<SkScalar> pos;
for (unsigned i = 0; i < count; ++i) {
*pos.append() = offset.x() + i * advanceX;
}
memcpy(buf.glyphs, fGlyphs.begin() + currentGlyph, count * sizeof(uint16_t));
memcpy(buf.pos, pos.begin(), count * sizeof(SkScalar));
} break;
case kPoint_Pos: {
const SkTextBlobBuilder::RunBuffer& buf = builder.allocRunPos(font, count);
SkTDArray<SkScalar> pos;
for (unsigned i = 0; i < count; ++i) {
*pos.append() = offset.x() + i * advanceX;
*pos.append() = offset.y() + i * (advanceY / count);
}
memcpy(buf.glyphs, fGlyphs.begin() + currentGlyph, count * sizeof(uint16_t));
memcpy(buf.pos, pos.begin(), count * sizeof(SkScalar) * 2);
} break;
default:
SK_ABORT("unhandled pos value");
}
currentGlyph += count;
}
}
return builder.make();
}
SkTDArray<uint16_t> fGlyphs;
sk_sp<SkTypeface> fTypeface;
const char* fText;
typedef skiagm::GM INHERITED;
};
DEF_GM(return new TextBlobGM("hamburgefons");)