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skia2/gm/showmiplevels.cpp
Adlai Holler 302e8fb771 Downgrade SkImage to GrImageContext 
We still occasionally downcast, so this is not airtight,
but it (1) allows us to know where we are downcasting and
(2) lets us move away from GrContext (and hopefully remove
it sooner than later.)

All three canaries are currently broken =( so here we go!

Bug: skia:104662
Change-Id: I84efe132574690b62ea512e194e4f9e318e9c050
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/316218
Commit-Queue: Adlai Holler <adlai@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
2020-09-14 17:01:07 +00:00

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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/gm.h"
#include "include/core/SkBitmap.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkColorPriv.h"
#include "include/core/SkImageInfo.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPixmap.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/private/SkNx.h"
#include "src/core/SkMipmap.h"
#include "tools/ToolUtils.h"
#include <math.h>
#define SHOW_MIP_COLOR 0xFF000000
static SkBitmap make_bitmap(int w, int h) {
SkBitmap bm;
bm.allocN32Pixels(w, h);
SkCanvas canvas(bm);
canvas.clear(0xFFFFFFFF);
SkPaint paint;
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(w / 16.0f);
paint.setColor(SHOW_MIP_COLOR);
canvas.drawCircle(w/2.0f, h/2.0f, w/3.0f, paint);
return bm;
}
static SkBitmap make_bitmap2(int w, int h) {
SkBitmap bm;
bm.allocN32Pixels(w, h);
SkCanvas canvas(bm);
canvas.clear(0xFFFFFFFF);
SkPaint paint;
paint.setColor(SHOW_MIP_COLOR);
paint.setStyle(SkPaint::kStroke_Style);
SkScalar inset = 2;
SkRect r = SkRect::MakeIWH(w, h).makeInset(0.5f, 0.5f);
while (r.width() > 4) {
canvas.drawRect(r, paint);
r.inset(inset, inset);
inset += 1;
}
return bm;
}
static SkBitmap make_bitmap3(int w, int h) {
SkBitmap bm;
bm.allocN32Pixels(w, h);
SkCanvas canvas(bm);
canvas.clear(0xFFFFFFFF);
SkPaint paint;
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(2.1f);
paint.setColor(SHOW_MIP_COLOR);
SkScalar s = SkIntToScalar(w);
Sk4f p(s, -s, -s, s);
Sk4f d(5);
while (p[1] < s) {
canvas.drawLine(p[0],p[1], p[2], p[3], paint);
p = p + d;
}
return bm;
}
class ShowMipLevels : public skiagm::GM {
const int fN;
SkBitmap fBM[4];
public:
static unsigned gamma(unsigned n) {
float x = n / 255.0f;
#if 0
x = sqrtf(x);
#else
if (x > 0.0031308f) {
x = 1.055f * (powf(x, (1.0f / 2.4f))) - 0.055f;
} else {
x = 12.92f * x;
}
#endif
return (int)(x * 255);
}
static void apply_gamma(const SkBitmap& bm) {
return; // below is our experiment for sRGB correction
for (int y = 0; y < bm.height(); ++y) {
for (int x = 0; x < bm.width(); ++x) {
SkPMColor c = *bm.getAddr32(x, y);
unsigned r = gamma(SkGetPackedR32(c));
unsigned g = gamma(SkGetPackedG32(c));
unsigned b = gamma(SkGetPackedB32(c));
*bm.getAddr32(x, y) = SkPackARGB32(0xFF, r, g, b);
}
}
}
ShowMipLevels(int N) : fN(N) { }
protected:
SkString onShortName() override {
SkString str;
str.printf("showmiplevels_%d", fN);
return str;
}
SkISize onISize() override { return { 150, 862 }; }
static void DrawAndFrame(SkCanvas* canvas, const SkBitmap& orig, SkScalar x, SkScalar y) {
SkBitmap bm;
ToolUtils::copy_to(&bm, orig.colorType(), orig);
apply_gamma(bm);
canvas->drawBitmap(bm, x, y, nullptr);
SkPaint paint;
paint.setStyle(SkPaint::kStroke_Style);
paint.setColor(0xFFFFCCCC);
canvas->drawRect(SkRect::MakeIWH(bm.width(), bm.height()).makeOffset(x, y).makeOutset(0.5f, 0.5f), paint);
}
template <typename F> void drawLevels(SkCanvas* canvas, const SkBitmap& baseBM, F func) {
SkScalar x = 4;
SkScalar y = 4;
SkPixmap prevPM;
baseBM.peekPixels(&prevPM);
sk_sp<SkMipmap> mm(SkMipmap::Build(baseBM, nullptr));
int index = 0;
SkMipmap::Level level;
SkScalar scale = 0.5f;
while (mm->extractLevel(SkSize::Make(scale, scale), &level)) {
SkBitmap bm = func(prevPM, level.fPixmap);
DrawAndFrame(canvas, bm, x, y);
if (level.fPixmap.width() <= 2 || level.fPixmap.height() <= 2) {
break;
}
if (index & 1) {
x += level.fPixmap.width() + 4;
} else {
y += level.fPixmap.height() + 4;
}
scale /= 2;
prevPM = level.fPixmap;
index += 1;
}
}
void drawSet(SkCanvas* canvas, const SkBitmap& orig) {
SkAutoCanvasRestore acr(canvas, true);
drawLevels(canvas, orig, [](const SkPixmap& prev, const SkPixmap& curr) {
SkBitmap bm;
bm.installPixels(curr);
return bm;
});
}
void onOnceBeforeDraw() override {
fBM[0] = ToolUtils::create_checkerboard_bitmap(fN, fN, SK_ColorBLACK, SK_ColorWHITE, 2);
fBM[1] = make_bitmap(fN, fN);
fBM[2] = make_bitmap2(fN, fN);
fBM[3] = make_bitmap3(fN, fN);
}
void onDraw(SkCanvas* canvas) override {
canvas->translate(4, 4);
for (const auto& bm : fBM) {
this->drawSet(canvas, bm);
// round so we always produce an integral translate, so the GOLD tool won't show
// unimportant diffs if this is drawn on a GPU with different rounding rules
// since we draw the bitmaps using nearest-neighbor
canvas->translate(0, SkScalarRoundToScalar(bm.height() * 0.85f));
}
}
private:
using INHERITED = skiagm::GM;
};
DEF_GM( return new ShowMipLevels(255); )
DEF_GM( return new ShowMipLevels(256); )
///////////////////////////////////////////////////////////////////////////////////////////////////
void copy_to(SkBitmap* dst, SkColorType dstColorType, const SkBitmap& src) {
if (kGray_8_SkColorType == dstColorType) {
return ToolUtils::copy_to_g8(dst, src);
}
const SkBitmap* srcPtr = &src;
SkBitmap tmp(src);
if (kRGB_565_SkColorType == dstColorType) {
tmp.setAlphaType(kOpaque_SkAlphaType);
srcPtr = &tmp;
}
ToolUtils::copy_to(dst, dstColorType, *srcPtr);
}
/**
* Show mip levels that were built, for all supported colortypes
*/
class ShowMipLevels2 : public skiagm::GM {
const int fW, fH;
SkBitmap fBM[4];
public:
ShowMipLevels2(int w, int h) : fW(w), fH(h) { }
protected:
SkString onShortName() override {
SkString str;
str.printf("showmiplevels2_%dx%d", fW, fH);
return str;
}
SkISize onISize() override {
return { 824, 862 };
}
static void DrawAndFrame(SkCanvas* canvas, const SkBitmap& bm, SkScalar x, SkScalar y) {
canvas->drawBitmap(bm, x, y, nullptr);
SkPaint paint;
paint.setStyle(SkPaint::kStroke_Style);
paint.setColor(0xFFFFCCCC);
canvas->drawRect(SkRect::MakeIWH(bm.width(), bm.height()).makeOffset(x, y).makeOutset(0.5f, 0.5f), paint);
}
void drawLevels(SkCanvas* canvas, const SkBitmap& baseBM) {
SkScalar x = 4;
SkScalar y = 4;
sk_sp<SkMipmap> mm(SkMipmap::Build(baseBM, nullptr));
int index = 0;
SkMipmap::Level level;
SkScalar scale = 0.5f;
while (mm->extractLevel(SkSize::Make(scale, scale), &level)) {
SkBitmap bm;
bm.installPixels(level.fPixmap);
DrawAndFrame(canvas, bm, x, y);
if (level.fPixmap.width() <= 2 || level.fPixmap.height() <= 2) {
break;
}
if (index & 1) {
x += level.fPixmap.width() + 4;
} else {
y += level.fPixmap.height() + 4;
}
scale /= 2;
index += 1;
}
}
void drawSet(SkCanvas* canvas, const SkBitmap& orig) {
const SkColorType ctypes[] = {
kN32_SkColorType, kRGB_565_SkColorType, kARGB_4444_SkColorType, kGray_8_SkColorType
};
SkAutoCanvasRestore acr(canvas, true);
for (auto ctype : ctypes) {
SkBitmap bm;
copy_to(&bm, ctype, orig);
drawLevels(canvas, bm);
canvas->translate(orig.width()/2 + 8.0f, 0);
}
}
void onOnceBeforeDraw() override {
fBM[0] = ToolUtils::create_checkerboard_bitmap(fW, fH, SHOW_MIP_COLOR, SK_ColorWHITE, 2);
fBM[1] = make_bitmap(fW, fH);
fBM[2] = make_bitmap2(fW, fH);
fBM[3] = make_bitmap3(fW, fH);
}
void onDraw(SkCanvas* canvas) override {
canvas->translate(4, 4);
for (const auto& bm : fBM) {
this->drawSet(canvas, bm);
// round so we always produce an integral translate, so the GOLD tool won't show
// unimportant diffs if this is drawn on a GPU with different rounding rules
// since we draw the bitmaps using nearest-neighbor
canvas->translate(0, SkScalarRoundToScalar(bm.height() * 0.85f));
}
}
private:
using INHERITED = skiagm::GM;
};
DEF_GM( return new ShowMipLevels2(255, 255); )
DEF_GM( return new ShowMipLevels2(256, 255); )
DEF_GM( return new ShowMipLevels2(255, 256); )
DEF_GM( return new ShowMipLevels2(256, 256); )
#include "tools/Resources.h"
class ShowMipLevels3 : public skiagm::GM {
sk_sp<SkImage> fImg;
SkString onShortName() override { return SkString("showmiplevels_explicit"); }
SkISize onISize() override { return {1130, 970}; }
void onOnceBeforeDraw() override {
fImg = GetResourceAsImage("images/ship.png");
fImg = fImg->makeRasterImage(); // makeWithMips only works on raster for now
const SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE };
SkMipmapBuilder builder(fImg->imageInfo());
for (int i = 0; i < builder.countLevels(); ++i) {
auto surf = SkSurface::MakeRasterDirect(builder.level(i));
surf->getCanvas()->drawColor(colors[i % SK_ARRAY_COUNT(colors)]);
}
fImg = fImg->withMipmaps(builder.detach());
}
DrawResult onDraw(SkCanvas* canvas, SkString*) override {
if (canvas->recordingContext()) {
// mips not supported yet
return DrawResult::kSkip;
}
canvas->drawColor(0xFFDDDDDD);
canvas->translate(10, 10);
for (auto mm : {SkMipmapMode::kNone, SkMipmapMode::kNearest, SkMipmapMode::kLinear}) {
for (auto sa : {SkSamplingMode::kNearest, SkSamplingMode::kLinear}) {
canvas->translate(0, draw_downscaling(canvas, {sa, mm}));
}
}
return DrawResult::kOk;
}
private:
SkScalar draw_downscaling(SkCanvas* canvas, SkFilterOptions options) {
SkAutoCanvasRestore acr(canvas, true);
SkPaint paint;
SkRect r = {0, 0, 150, 150};
for (float scale = 1; scale >= 0.1f; scale *= 0.7f) {
SkMatrix matrix = SkMatrix::Scale(scale, scale);
paint.setShader(fImg->makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat,
options, &matrix));
canvas->drawRect(r, paint);
canvas->translate(r.width() + 10, 0);
}
return r.height() + 10;
}
using INHERITED = skiagm::GM;
};
DEF_GM( return new ShowMipLevels3; )
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