You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
111 lines
3.7 KiB
111 lines
3.7 KiB
/*
|
|
* Copyright 2020 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/SkRSXform.h"
|
|
#include "include/core/SkShader.h"
|
|
#include "include/core/SkSurface.h"
|
|
#include "include/core/SkTextBlob.h"
|
|
#include "tools/ToolUtils.h"
|
|
|
|
// Exercises RSX text blobs + shader with various local matrix combinations.
|
|
// Yellow grid should stay aligned for text vs. background.
|
|
class RSXShaderGM : public skiagm::GM {
|
|
public:
|
|
private:
|
|
SkString onShortName() override {
|
|
return SkString("rsx_blob_shader");
|
|
}
|
|
|
|
SkISize onISize() override {
|
|
return SkISize::Make(kSZ*kScale*2.1f, kSZ*kScale*2.1f);
|
|
}
|
|
|
|
void onOnceBeforeDraw() override {
|
|
const SkFontStyle style(SkFontStyle::kExtraBlack_Weight,
|
|
SkFontStyle::kNormal_Width,
|
|
SkFontStyle::kUpright_Slant);
|
|
SkFont font(ToolUtils::create_portable_typeface(nullptr, style), kFontSZ);
|
|
font.setEdging(SkFont::Edging::kAntiAlias);
|
|
|
|
static constexpr char txt[] = "TEST";
|
|
SkGlyphID glyphs[16];
|
|
float widths[16];
|
|
const auto glyph_count = font.textToGlyphs(txt, strlen(txt), SkTextEncoding::kUTF8,
|
|
glyphs, SK_ARRAY_COUNT(glyphs));
|
|
font.getWidths(glyphs, glyph_count, widths);
|
|
|
|
SkTextBlobBuilder builder;
|
|
const auto& buf = builder.allocRunRSXform(font, glyph_count);
|
|
std::copy(glyphs, glyphs + glyph_count, buf.glyphs);
|
|
|
|
float x = 0;
|
|
for (int i = 0; i < glyph_count; ++i) {
|
|
buf.xforms()[i] = {
|
|
1, 0,
|
|
x, 0,
|
|
};
|
|
x += widths[i];
|
|
}
|
|
|
|
fBlob = builder.make();
|
|
}
|
|
|
|
void onDraw(SkCanvas* canvas) override {
|
|
canvas->scale(kScale, kScale);
|
|
this->draw_one(canvas,
|
|
{0, 0}, SkMatrix::I(), SkMatrix::I());
|
|
this->draw_one(canvas,
|
|
{kSZ*1.1f, 0}, SkMatrix::Scale(2, 2), SkMatrix::I());
|
|
this->draw_one(canvas,
|
|
{0, kSZ*1.1f}, SkMatrix::I(), SkMatrix::RotateDeg(45));
|
|
this->draw_one(canvas,
|
|
{kSZ*1.1f, kSZ*1.1f}, SkMatrix::Scale(2, 2), SkMatrix::RotateDeg(45));
|
|
}
|
|
|
|
void draw_one(SkCanvas* canvas, SkPoint pos, const SkMatrix& lm,
|
|
const SkMatrix& outer_lm) const {
|
|
SkAutoCanvasRestore acr(canvas, true);
|
|
canvas->translate(pos.fX, pos.fY);
|
|
|
|
SkPaint p;
|
|
p.setShader(make_shader(lm, outer_lm));
|
|
p.setAlphaf(0.75f);
|
|
canvas->drawRect(SkRect::MakeWH(kSZ, kSZ), p);
|
|
|
|
p.setAlphaf(1);
|
|
canvas->drawTextBlob(fBlob, 0, kFontSZ*1, p);
|
|
canvas->drawTextBlob(fBlob, 0, kFontSZ*2, p);
|
|
}
|
|
|
|
static sk_sp<SkShader> make_shader(const SkMatrix& lm, const SkMatrix& outer_lm) {
|
|
static constexpr SkISize kTileSize = { 30, 30 };
|
|
auto surface = SkSurface::MakeRasterN32Premul(kTileSize.width(), kTileSize.height());
|
|
|
|
SkPaint p;
|
|
p.setColor(0xffffff00);
|
|
surface->getCanvas()->drawPaint(p);
|
|
p.setColor(0xff008000);
|
|
surface->getCanvas()
|
|
->drawRect({0, 0, kTileSize.width()*0.9f, kTileSize.height()*0.9f}, p);
|
|
|
|
return surface->makeImageSnapshot()
|
|
->makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat,
|
|
SkSamplingOptions(SkFilterMode::kLinear), &lm)
|
|
->makeWithLocalMatrix(outer_lm);
|
|
}
|
|
|
|
static constexpr float kSZ = 300,
|
|
kFontSZ = kSZ * 0.38,
|
|
kScale = 1.4f;
|
|
|
|
sk_sp<SkTextBlob> fBlob;
|
|
};
|
|
|
|
DEF_GM(return new RSXShaderGM;)
|