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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm.h"
#include "SkBlitter.h"
#include "SkCanvas.h"
#include "SkColor.h"
#include "SkImage.h"
#include "SkImageInfo.h"
#include "SkLinearBitmapPipeline.h"
#include "SkXfermode.h"
#include "SkPM4fPriv.h"
#include "SkShader.h"
static void fill_in_bits(SkBitmap& bm, SkIRect ir, SkColor c, bool premul) {
bm.allocN32Pixels(ir.width(), ir.height());
SkPixmap pm;
bm.peekPixels(&pm);
SkPMColor b = SkColorSetARGBMacro(255, 0, 0, 0);
SkPMColor w;
if (premul) {
w = SkPreMultiplyColor(c);
} else {
w = SkPackARGB32NoCheck(SkColorGetA(c), SkColorGetR(c), SkColorGetG(c), SkColorGetB(c));
}
for (int y = 0; y < ir.height(); y++) {
for (int x = 0; x < ir.width(); x++) {
if ((x ^ y) & 16) {
*pm.writable_addr32(x, y) = b;
} else {
*pm.writable_addr32(x, y) = w;
}
}
}
}
static void draw_rect_orig(SkCanvas* canvas, const SkRect& r, SkColor c, const SkMatrix* mat, bool useBilerp) {
const SkIRect ir = r.round();
SkBitmap bmsrc;
fill_in_bits(bmsrc, ir, c, true);
SkPixmap pmsrc;
bmsrc.peekPixels(&pmsrc);
SkBitmap bmdst;
bmdst.allocN32Pixels(ir.width(), ir.height());
bmdst.eraseColor(0xFFFFFFFF);
SkPixmap pmdst;
bmdst.peekPixels(&pmdst);
SkImageInfo info = SkImageInfo::MakeN32Premul(ir.width(), ir.height());
sk_sp<SkImage> image(SkImage::MakeRasterCopy(SkPixmap(info, pmsrc.addr32(), pmsrc.rowBytes())));
SkPaint paint;
int32_t storage[kSkBlitterContextSize];
sk_sp<SkShader> shader = image->makeShader(SkShader::kRepeat_TileMode,
SkShader::kRepeat_TileMode);
if (useBilerp) {
paint.setFilterQuality(SkFilterQuality::kLow_SkFilterQuality);
} else {
paint.setFilterQuality(SkFilterQuality::kNone_SkFilterQuality);
}
paint.setShader(std::move(shader));
const SkShader::ContextRec rec(paint, *mat, nullptr,
SkBlitter::PreferredShaderDest(pmsrc.info()));
SkASSERT(paint.getShader()->contextSize(rec) <= sizeof(storage));
SkShader::Context* ctx = paint.getShader()->createContext(rec, storage);
for (int y = 0; y < ir.height(); y++) {
ctx->shadeSpan(0, y, pmdst.writable_addr32(0, y), ir.width());
}
canvas->drawBitmap(bmdst, r.left(), r.top(), nullptr);
ctx->~Context();
}
static void draw_rect_fp(SkCanvas* canvas, const SkRect& r, SkColor c, const SkMatrix* mat, bool useBilerp) {
const SkIRect ir = r.round();
SkBitmap bmsrc;
fill_in_bits(bmsrc, ir, c, true);
SkPixmap pmsrc;
bmsrc.peekPixels(&pmsrc);
SkBitmap bmdst;
bmdst.allocN32Pixels(ir.width(), ir.height());
bmdst.eraseColor(0xFFFFFFFF);
SkPixmap pmdst;
bmdst.peekPixels(&pmdst);
SkPM4f* dstBits = new SkPM4f[ir.width()];
SkMatrix inv;
bool trash = mat->invert(&inv);
sk_ignore_unused_variable(trash);
SkFilterQuality filterQuality;
if (useBilerp) {
filterQuality = SkFilterQuality::kLow_SkFilterQuality;
} else {
filterQuality = SkFilterQuality::kNone_SkFilterQuality;
}
uint32_t flags = 0;
auto procN = SkXfermode::GetD32Proc(nullptr, flags);
SkLinearBitmapPipeline pipeline{
inv, filterQuality,
SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode, SK_ColorBLACK, pmsrc};
for (int y = 0; y < ir.height(); y++) {
pipeline.shadeSpan4f(0, y, dstBits, ir.width());
procN(nullptr, pmdst.writable_addr32(0, y), dstBits, ir.width(), nullptr);
}
delete [] dstBits;
canvas->drawBitmap(bmdst, r.left(), r.top(), nullptr);
}
static void draw_rect_none(SkCanvas* canvas, const SkRect& r, SkColor c) {
const SkIRect ir = r.round();
SkBitmap bm;
fill_in_bits(bm, ir, c, true);
canvas->drawBitmap(bm, r.left(), r.top(), nullptr);
}
/*
* Test SkXfer4fProcs directly for src-over, comparing them to current SkColor blits.
*/
DEF_SIMPLE_GM(linear_pipeline, canvas, 580, 2200) {
const int IW = 50;
const SkScalar W = IW;
const SkScalar H = 100;
const SkColor colors[] = {
0x880000FF, 0x8800FF00, 0x88FF0000, 0x88000000,
SK_ColorBLUE, SK_ColorGREEN, SK_ColorRED, SK_ColorBLACK,
};
canvas->translate(20, 20);
SkMatrix mi = SkMatrix::I();
SkMatrix mlr;
mlr.setScale(-1.0f, 1.0f, 20, 0.0f);
SkMatrix mt;
mt.setTranslate(8, 8);
SkMatrix mt2;
mt2.setTranslate(-18, -18);
SkMatrix ms;
ms.setScale(2.7f, 2.7f, -1.5f, 0);
SkMatrix ms2;
ms2.setScale(-0.4f, 0.4f);
SkMatrix mr;
mr.setRotate(10);
const SkMatrix* mats[] = {nullptr, &mi, &mlr, &mt, &mt2, &ms, &ms2, &mr};
const SkRect r = SkRect::MakeWH(W, H);
bool useBilerp = false;
while (true) {
canvas->save();
for (auto mat : mats) {
canvas->save();
for (SkColor c : colors) {
if (mat == nullptr) {
SkPaint p;
p.setColor(c);
draw_rect_none(canvas, r, c);
canvas->translate(W + 20, 0);
draw_rect_none(canvas, r, c);
} else {
draw_rect_orig(canvas, r, c, mat, useBilerp);
canvas->translate(W + 20, 0);
draw_rect_fp(canvas, r, c, mat, useBilerp);
}
canvas->translate(W + 20, 0);
}
canvas->restore();
canvas->translate(0, H + 20);
}
canvas->restore();
canvas->translate(0, (H + 20) * SK_ARRAY_COUNT(mats));
if (useBilerp) break;
useBilerp = true;
}
}
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