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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 "gm/gm.h"
- #include "include/core/SkBitmap.h"
- #include "include/core/SkCanvas.h"
- #include "include/core/SkColorSpace.h"
- #include "include/core/SkFilterQuality.h"
- #include "include/core/SkImage.h"
- #include "include/core/SkImageInfo.h"
- #include "include/core/SkPaint.h"
- #include "include/core/SkRect.h"
- #include "include/core/SkRefCnt.h"
- #include "include/core/SkString.h"
- #include "include/core/SkSurface.h"
- #include "include/core/SkTypes.h"
- static sk_sp<SkImage> make_image() {
- const SkImageInfo info = SkImageInfo::MakeN32Premul(319, 52);
- auto surface(SkSurface::MakeRaster(info));
- SkCanvas* canvas = surface->getCanvas();
- canvas->drawColor(0xFFF8F8F8);
- SkPaint paint;
- paint.setAntiAlias(true);
- paint.setStyle(SkPaint::kStroke_Style);
- for (int i = 0; i < 20; ++i) {
- canvas->drawCircle(-4, 25, 20, paint);
- canvas->translate(25, 0);
- }
- return surface->makeImageSnapshot();
- }
- DEF_SIMPLE_GM(mipmap, canvas, 400, 200) {
- sk_sp<SkImage> img(make_image());//SkImage::NewFromEncoded(data));
- SkPaint paint;
- const SkRect dst = SkRect::MakeWH(177, 15);
- SkString str;
- str.printf("scale %g %g", dst.width() / img->width(), dst.height() / img->height());
- // canvas->drawString(str, 300, 100, SkFont(nullptr, 30), paint);
- canvas->translate(20, 20);
- for (int i = 0; i < 4; ++i) {
- paint.setFilterQuality(SkFilterQuality(i));
- canvas->drawImageRect(img.get(), dst, &paint);
- canvas->translate(0, 20);
- }
- canvas->drawImage(img.get(), 20, 20, nullptr);
- }
- ///////////////////////////////////////////////////////////////////////////////////////////////////
- // create a circle image computed raw, so we can wrap it as a linear or srgb image
- static sk_sp<SkImage> make(sk_sp<SkColorSpace> cs) {
- const int N = 100;
- SkImageInfo info = SkImageInfo::Make(N, N, kN32_SkColorType, kPremul_SkAlphaType, cs);
- SkBitmap bm;
- bm.allocPixels(info);
- for (int y = 0; y < N; ++y) {
- for (int x = 0; x < N; ++x) {
- *bm.getAddr32(x, y) = (x ^ y) & 1 ? 0xFFFFFFFF : 0xFF000000;
- }
- }
- bm.setImmutable();
- return SkImage::MakeFromBitmap(bm);
- }
- static void show_mips(SkCanvas* canvas, SkImage* img) {
- SkPaint paint;
- paint.setFilterQuality(kMedium_SkFilterQuality);
- // Want to ensure we never draw fractional pixels, so we use an IRect
- SkIRect dst = SkIRect::MakeWH(img->width(), img->height());
- while (dst.width() > 5) {
- canvas->drawImageRect(img, SkRect::Make(dst), &paint);
- dst.offset(dst.width() + 10, 0);
- dst.fRight = dst.fLeft + dst.width()/2;
- dst.fBottom = dst.fTop + dst.height()/2;
- }
- }
- /*
- * Ensure that in L32 drawing mode, both images/mips look the same as each other, and
- * their mips are darker than the original (since the mips should ignore the gamma in L32).
- *
- * Ensure that in S32 drawing mode, all images/mips look the same, and look correct (i.e.
- * the mip levels match the original in brightness).
- */
- DEF_SIMPLE_GM(mipmap_srgb, canvas, 260, 230) {
- sk_sp<SkImage> limg = make(nullptr);
- sk_sp<SkImage> simg = make(SkColorSpace::MakeSRGB());
- canvas->translate(10, 10);
- show_mips(canvas, limg.get());
- canvas->translate(0, limg->height() + 10.0f);
- show_mips(canvas, simg.get());
- }
- ///////////////////////////////////////////////////////////////////////////////////////////////////
- // create a gradient image computed raw, so we can wrap it as a linear or srgb image
- static sk_sp<SkImage> make_g8_gradient(sk_sp<SkColorSpace> cs) {
- const int N = 100;
- SkImageInfo info = SkImageInfo::Make(N, N, kGray_8_SkColorType, kOpaque_SkAlphaType, cs);
- SkBitmap bm;
- bm.allocPixels(info);
- for (int y = 0; y < N; ++y) {
- for (int x = 0; x < N; ++x) {
- *bm.getAddr8(x, y) = static_cast<uint8_t>(255.0f * ((x + y) / (2.0f * (N - 1))));
- }
- }
- bm.setImmutable();
- return SkImage::MakeFromBitmap(bm);
- }
- static void show_mips_only(SkCanvas* canvas, SkImage* img) {
- SkPaint paint;
- paint.setFilterQuality(kMedium_SkFilterQuality);
- // Want to ensure we never draw fractional pixels, so we use an IRect
- SkIRect dst = SkIRect::MakeWH(img->width() / 2, img->height() / 2);
- while (dst.width() > 5) {
- canvas->drawImageRect(img, SkRect::Make(dst), &paint);
- dst.offset(dst.width() + 10, 0);
- dst.fRight = dst.fLeft + dst.width() / 2;
- dst.fBottom = dst.fTop + dst.height() / 2;
- }
- }
- /*
- * Ensure that in L32 drawing mode, both images/mips look the same as each other, and
- * their mips are darker than the original (since the mips should ignore the gamma in L32).
- *
- * Ensure that in S32 drawing mode, all images/mips look the same, and look correct (i.e.
- * the mip levels match the original in brightness).
- */
- DEF_SIMPLE_GM(mipmap_gray8_srgb, canvas, 260, 230) {
- sk_sp<SkImage> limg = make_g8_gradient(nullptr);
- sk_sp<SkImage> simg = make_g8_gradient(SkColorSpace::MakeSRGB());
- canvas->translate(10, 10);
- show_mips_only(canvas, limg.get());
- canvas->translate(0, limg->height() + 10.0f);
- show_mips_only(canvas, simg.get());
- }
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