2 * Copyright 2015 Google Inc.
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
12 #include "SkSurface.h"
14 static sk_sp<SkImage> make_image() {
15 const SkImageInfo info = SkImageInfo::MakeN32Premul(319, 52);
16 auto surface(SkSurface::MakeRaster(info));
17 SkCanvas* canvas = surface->getCanvas();
18 canvas->drawColor(sk_tool_utils::color_to_565(0xFFF8F8F8));
21 paint.setAntiAlias(true);
23 paint.setStyle(SkPaint::kStroke_Style);
24 for (int i = 0; i < 20; ++i) {
25 canvas->drawCircle(-4, 25, 20, paint);
26 canvas->translate(25, 0);
28 return surface->makeImageSnapshot();
31 DEF_SIMPLE_GM(mipmap, canvas, 400, 200) {
32 sk_sp<SkImage> img(make_image());//SkImage::NewFromEncoded(data));
35 const SkRect dst = SkRect::MakeWH(177, 15);
37 paint.setTextSize(30);
39 str.printf("scale %g %g", dst.width() / img->width(), dst.height() / img->height());
40 // canvas->drawText(str.c_str(), str.size(), 300, 100, paint);
42 canvas->translate(20, 20);
43 for (int i = 0; i < 4; ++i) {
44 paint.setFilterQuality(SkFilterQuality(i));
45 canvas->drawImageRect(img.get(), dst, &paint);
46 canvas->translate(0, 20);
48 canvas->drawImage(img.get(), 20, 20, nullptr);
51 ///////////////////////////////////////////////////////////////////////////////////////////////////
53 // create a circle image computed raw, so we can wrap it as a linear or srgb image
54 static sk_sp<SkImage> make(sk_sp<SkColorSpace> cs) {
56 SkImageInfo info = SkImageInfo::Make(N, N, kN32_SkColorType, kPremul_SkAlphaType, cs);
60 for (int y = 0; y < N; ++y) {
61 for (int x = 0; x < N; ++x) {
62 *bm.getAddr32(x, y) = (x ^ y) & 1 ? 0xFFFFFFFF : 0xFF000000;
66 return SkImage::MakeFromBitmap(bm);
69 static void show_mips(SkCanvas* canvas, SkImage* img) {
71 paint.setFilterQuality(kMedium_SkFilterQuality);
73 // Want to ensure we never draw fractional pixels, so we use an IRect
74 SkIRect dst = SkIRect::MakeWH(img->width(), img->height());
75 while (dst.width() > 5) {
76 canvas->drawImageRect(img, SkRect::Make(dst), &paint);
77 dst.offset(dst.width() + 10, 0);
78 dst.fRight = dst.fLeft + dst.width()/2;
79 dst.fBottom = dst.fTop + dst.height()/2;
84 * Ensure that in L32 drawing mode, both images/mips look the same as each other, and
85 * their mips are darker than the original (since the mips should ignore the gamma in L32).
87 * Ensure that in S32 drawing mode, all images/mips look the same, and look correct (i.e.
88 * the mip levels match the original in brightness).
90 DEF_SIMPLE_GM(mipmap_srgb, canvas, 260, 230) {
91 sk_sp<SkImage> limg = make(nullptr);
92 sk_sp<SkImage> simg = make(SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named));
94 canvas->translate(10, 10);
95 show_mips(canvas, limg.get());
96 canvas->translate(0, limg->height() + 10.0f);
97 show_mips(canvas, simg.get());
100 ///////////////////////////////////////////////////////////////////////////////////////////////////
102 // create a gradient image computed raw, so we can wrap it as a linear or srgb image
103 static sk_sp<SkImage> make_g8_gradient(sk_sp<SkColorSpace> cs) {
105 SkImageInfo info = SkImageInfo::Make(N, N, kGray_8_SkColorType, kOpaque_SkAlphaType, cs);
107 bm.allocPixels(info);
109 for (int y = 0; y < N; ++y) {
110 for (int x = 0; x < N; ++x) {
111 *bm.getAddr8(x, y) = static_cast<uint8_t>(255.0f * ((x + y) / (2.0f * (N - 1))));
115 return SkImage::MakeFromBitmap(bm);
118 static void show_mips_only(SkCanvas* canvas, SkImage* img) {
120 paint.setFilterQuality(kMedium_SkFilterQuality);
122 // Want to ensure we never draw fractional pixels, so we use an IRect
123 SkIRect dst = SkIRect::MakeWH(img->width() / 2, img->height() / 2);
124 while (dst.width() > 5) {
125 canvas->drawImageRect(img, SkRect::Make(dst), &paint);
126 dst.offset(dst.width() + 10, 0);
127 dst.fRight = dst.fLeft + dst.width() / 2;
128 dst.fBottom = dst.fTop + dst.height() / 2;
133 * Ensure that in L32 drawing mode, both images/mips look the same as each other, and
134 * their mips are darker than the original (since the mips should ignore the gamma in L32).
136 * Ensure that in S32 drawing mode, all images/mips look the same, and look correct (i.e.
137 * the mip levels match the original in brightness).
139 * This test also verifies handling of Gray_8 data in Ganesh, which is not done natively.
141 DEF_SIMPLE_GM(mipmap_gray8_srgb, canvas, 260, 230) {
142 sk_sp<SkImage> limg = make_g8_gradient(nullptr);
143 sk_sp<SkImage> simg = make_g8_gradient(SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named));
145 canvas->translate(10, 10);
146 show_mips_only(canvas, limg.get());
147 canvas->translate(0, limg->height() + 10.0f);
148 show_mips_only(canvas, simg.get());