skia2/gm/showmiplevels.cpp

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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 "Resources.h"
#include "SkBitmapScaler.h"
#include "SkGradientShader.h"
#include "SkTypeface.h"
#include "SkStream.h"
#include "SkPaint.h"
#include "SkMipMap.h"
#include "Resources.h"
#include "sk_tool_utils.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;
}
#include "SkNx.h"
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
bm.lockPixels();
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 { 824, 862 };
}
static void DrawAndFrame(SkCanvas* canvas, const SkBitmap& orig, SkScalar x, SkScalar y) {
SkBitmap bm;
orig.copyTo(&bm);
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.lockPixels();
baseBM.peekPixels(&prevPM);
SkDestinationSurfaceColorMode colorMode = SkDestinationSurfaceColorMode::kLegacy;
sk_sp<SkMipMap> mm(SkMipMap::Build(baseBM, colorMode, 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;
});
const SkBitmapScaler::ResizeMethod methods[] = {
SkBitmapScaler::RESIZE_BOX,
SkBitmapScaler::RESIZE_TRIANGLE,
SkBitmapScaler::RESIZE_LANCZOS3,
SkBitmapScaler::RESIZE_HAMMING,
SkBitmapScaler::RESIZE_MITCHELL,
};
SkPixmap basePM;
orig.lockPixels();
orig.peekPixels(&basePM);
for (auto method : methods) {
canvas->translate(orig.width()/2 + 8.0f, 0);
drawLevels(canvas, orig, [method](const SkPixmap& prev, const SkPixmap& curr) {
SkBitmap bm;
SkBitmapScaler::Resize(&bm, prev, method, curr.width(), curr.height());
return bm;
});
}
}
void onOnceBeforeDraw() override {
fBM[0] = sk_tool_utils::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);
canvas->translate(0, bm.height() * 0.85f);
}
}
private:
typedef skiagm::GM INHERITED;
};
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 sk_tool_utils::copy_to_g8(dst, src);
}
src.copyTo(dst, dstColorType);
}
/**
* 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;
SkDestinationSurfaceColorMode colorMode = SkDestinationSurfaceColorMode::kLegacy;
sk_sp<SkMipMap> mm(SkMipMap::Build(baseBM, colorMode, 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] = sk_tool_utils::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:
typedef skiagm::GM INHERITED;
};
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); )