skia2/gm/all_bitmap_configs.cpp

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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkSurface.h"
#include "Resources.h"
#include "gm.h"
#include "sk_tool_utils.h"
#include "SkMath.h"
#include "SkColorPriv.h"
static SkBitmap copy_bitmap(const SkBitmap& src, SkColorType colorType) {
const SkBitmap* srcPtr = &src;
SkBitmap tmp(src);
if (kRGB_565_SkColorType == colorType) {
tmp.setAlphaType(kOpaque_SkAlphaType);
srcPtr = &tmp;
}
SkBitmap copy;
sk_tool_utils::copy_to(&copy, colorType, *srcPtr);
copy.setImmutable();
return copy;
}
#define SCALE 128
// Make either A8 or gray8 bitmap.
static SkBitmap make_bitmap(SkColorType ct) {
SkBitmap bm;
switch (ct) {
case kAlpha_8_SkColorType:
bm.allocPixels(SkImageInfo::MakeA8(SCALE, SCALE));
break;
case kGray_8_SkColorType:
bm.allocPixels(
SkImageInfo::Make(SCALE, SCALE, ct, kOpaque_SkAlphaType));
break;
default:
SkASSERT(false);
return bm;
}
uint8_t spectrum[256];
for (int y = 0; y < 256; ++y) {
spectrum[y] = y;
}
for (int y = 0; y < 128; ++y) {
// Shift over one byte each scanline.
memcpy(bm.getAddr8(0, y), &spectrum[y], 128);
}
bm.setImmutable();
return bm;
}
static void draw_center_letter(char c,
SkPaint* p,
SkColor color,
SkScalar x,
SkScalar y,
SkCanvas* canvas) {
SkRect bounds;
p->setColor(color);
p->measureText(&c, 1, &bounds);
canvas->drawText(&c, 1, x - bounds.centerX(), y - bounds.centerY(), *p);
}
static void color_wheel_native(SkCanvas* canvas) {
SkAutoCanvasRestore autoCanvasRestore(canvas, true);
canvas->translate(0.5f * SCALE, 0.5f * SCALE);
SkPaint p;
p.setAntiAlias(false);
p.setColor(SK_ColorWHITE);
canvas->drawCircle(0.0f, 0.0f, SCALE * 0.5f, p);
const double sqrt_3_over_2 = 0.8660254037844387;
const SkScalar Z = 0.0f;
const SkScalar D = 0.3f * SkIntToScalar(SCALE);
const SkScalar X = SkDoubleToScalar(D * sqrt_3_over_2);
const SkScalar Y = D * SK_ScalarHalf;
sk_tool_utils::set_portable_typeface(&p, nullptr, SkFontStyle::Bold());
p.setTextSize(0.28125f * SCALE);
draw_center_letter('K', &p, SK_ColorBLACK, Z, Z, canvas);
draw_center_letter('R', &p, SK_ColorRED, Z, D, canvas);
draw_center_letter('G', &p, SK_ColorGREEN, -X, -Y, canvas);
draw_center_letter('B', &p, SK_ColorBLUE, X, -Y, canvas);
draw_center_letter('C', &p, SK_ColorCYAN, Z, -D, canvas);
draw_center_letter('M', &p, SK_ColorMAGENTA, X, Y, canvas);
draw_center_letter('Y', &p, SK_ColorYELLOW, -X, Y, canvas);
}
template <typename T>
int find(T* array, int N, T item) {
for (int i = 0; i < N; ++i) {
if (array[i] == item) {
return i;
}
}
return -1;
}
static void draw(SkCanvas* canvas,
const SkPaint& p,
const SkBitmap& src,
SkColorType colorType,
const char text[]) {
SkASSERT(src.colorType() == colorType);
canvas->drawBitmap(src, 0.0f, 0.0f);
canvas->drawString(text, 0.0f, 12.0f, p);
}
DEF_SIMPLE_GM(all_bitmap_configs, canvas, SCALE, 5 * SCALE) {
SkAutoCanvasRestore autoCanvasRestore(canvas, true);
SkPaint p;
p.setColor(SK_ColorBLACK);
p.setAntiAlias(true);
sk_tool_utils::set_portable_typeface(&p, nullptr);
sk_tool_utils::draw_checkerboard(canvas, SK_ColorLTGRAY, SK_ColorWHITE, 8);
SkBitmap bitmap;
if (GetResourceAsBitmap("images/color_wheel.png", &bitmap)) {
bitmap.setImmutable();
draw(canvas, p, bitmap, kN32_SkColorType, "Native 32");
canvas->translate(0.0f, SkIntToScalar(SCALE));
SkBitmap copy565 = copy_bitmap(bitmap, kRGB_565_SkColorType);
p.setColor(SK_ColorRED);
draw(canvas, p, copy565, kRGB_565_SkColorType, "RGB 565");
p.setColor(SK_ColorBLACK);
canvas->translate(0.0f, SkIntToScalar(SCALE));
SkBitmap copy4444 = copy_bitmap(bitmap, kARGB_4444_SkColorType);
draw(canvas, p, copy4444, kARGB_4444_SkColorType, "ARGB 4444");
} else {
canvas->translate(0.0f, SkIntToScalar(2 * SCALE));
}
canvas->translate(0.0f, SkIntToScalar(SCALE));
SkBitmap bitmapA8 = make_bitmap(kAlpha_8_SkColorType);
draw(canvas, p, bitmapA8, kAlpha_8_SkColorType, "Alpha 8");
p.setColor(SK_ColorRED);
canvas->translate(0.0f, SkIntToScalar(SCALE));
SkBitmap bitmapG8 = make_bitmap(kGray_8_SkColorType);
draw(canvas, p, bitmapG8, kGray_8_SkColorType, "Gray 8");
}
sk_sp<SkImage> make_not_native32_color_wheel() {
SkBitmap n32bitmap, notN32bitmap;
n32bitmap.allocN32Pixels(SCALE, SCALE);
n32bitmap.eraseColor(SK_ColorTRANSPARENT);
SkCanvas n32canvas(n32bitmap);
color_wheel_native(&n32canvas);
n32canvas.flush();
#if SK_PMCOLOR_BYTE_ORDER(B,G,R,A)
const SkColorType ct = kRGBA_8888_SkColorType;
#elif SK_PMCOLOR_BYTE_ORDER(R,G,B,A)
const SkColorType ct = kBGRA_8888_SkColorType;
#endif
static_assert(ct != kN32_SkColorType, "BRGA!=RGBA");
SkAssertResult(sk_tool_utils::copy_to(&notN32bitmap, ct, n32bitmap));
SkASSERT(notN32bitmap.colorType() == ct);
return SkImage::MakeFromBitmap(notN32bitmap);
}
DEF_SIMPLE_GM(not_native32_bitmap_config, canvas, SCALE, SCALE) {
sk_sp<SkImage> notN32image(make_not_native32_color_wheel());
SkASSERT(notN32image);
sk_tool_utils::draw_checkerboard(canvas, SK_ColorLTGRAY, SK_ColorWHITE, 8);
canvas->drawImage(notN32image.get(), 0.0f, 0.0f);
}
static uint32_t make_pixel(int x, int y, SkAlphaType alphaType) {
SkASSERT(x >= 0 && x < SCALE);
SkASSERT(y >= 0 && y < SCALE);
SkScalar R = SCALE / 2.0f;
uint32_t alpha = 0x00;
if ((x - R) * (x - R) + (y - R) * (y - R) < R * R) {
alpha = 0xFF;
}
uint32_t component;
switch (alphaType) {
case kPremul_SkAlphaType:
component = alpha;
break;
case kUnpremul_SkAlphaType:
component = 0xFF;
break;
default:
SK_ABORT("Should not get here - invalid alpha type");
return 0xFF000000;
}
return alpha << 24 | component;
}
static void make_color_test_bitmap_variant(
SkColorType colorType,
SkAlphaType alphaType,
sk_sp<SkColorSpace> colorSpace,
SkBitmap* bm)
{
SkASSERT(colorType == kRGBA_8888_SkColorType || colorType == kBGRA_8888_SkColorType);
SkASSERT(alphaType == kPremul_SkAlphaType || alphaType == kUnpremul_SkAlphaType);
bm->allocPixels(
SkImageInfo::Make(SCALE, SCALE, colorType, alphaType, colorSpace));
const SkPixmap& pm = bm->pixmap();
for (int y = 0; y < pm.height(); y++) {
for (int x = 0; x < pm.width(); x++) {
*pm.writable_addr32(x, y) = make_pixel(x, y, alphaType);
}
}
}
DEF_SIMPLE_GM(all_variants_8888, canvas, 4 * SCALE + 30, 2 * SCALE + 10) {
sk_tool_utils::draw_checkerboard(canvas, SK_ColorLTGRAY, SK_ColorWHITE, 8);
sk_sp<SkColorSpace> colorSpaces[] {
SkColorSpace::MakeSRGB(),
nullptr,
};
for (auto colorSpace : colorSpaces) {
canvas->save();
for (auto alphaType : {kPremul_SkAlphaType, kUnpremul_SkAlphaType}) {
canvas->save();
for (auto colorType : {kRGBA_8888_SkColorType, kBGRA_8888_SkColorType}) {
SkBitmap bm;
make_color_test_bitmap_variant(colorType, alphaType, colorSpace, &bm);
canvas->drawBitmap(bm, 0.0f, 0.0f);
canvas->translate(SCALE + 10, 0.0f);
}
canvas->restore();
canvas->translate(0.0f, SCALE + 10);
}
canvas->restore();
canvas->translate(2 * (SCALE + 10), 0.0f);
}
}