mirror of
https://github.com/yuzu-emu/FasTC
synced 2024-11-22 23:33:46 +00:00
248 lines
6.5 KiB
C++
248 lines
6.5 KiB
C++
// Copyright 2016 The University of North Carolina at Chapel Hill
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// Please send all BUG REPORTS to <pavel@cs.unc.edu>.
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// <http://gamma.cs.unc.edu/FasTC/>
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#include "gtest/gtest.h"
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#include "PVRTCImage.h"
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#include "FasTC/Pixel.h"
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#include "TestUtils.h"
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#include <cstdlib>
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TEST(Image, BilinearUpscale) {
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FasTC::Pixel pxs[16];
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for(uint32 i = 0; i < 4; i++) {
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for(uint32 j = 0; j < 4; j++) {
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pxs[j*4 + i].R() = i*2;
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pxs[j*4 + i].G() = j*2;
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}
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}
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PVRTCC::Image img(4, 4, pxs);
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img.BilinearUpscale(1, 1, PVRTCC::eWrapMode_Clamp);
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EXPECT_EQ(img.GetWidth(), static_cast<uint32>(8));
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EXPECT_EQ(img.GetHeight(), static_cast<uint32>(8));
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for(uint32 i = 0; i < img.GetWidth(); i++) {
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for(uint32 j = 0; j < img.GetHeight(); j++) {
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if(i == 0) {
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EXPECT_EQ(static_cast<uint32>(img(i, j).R()), i);
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} else {
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EXPECT_EQ(static_cast<uint32>(img(i, j).R()), i-1);
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}
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if(j == 0) {
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EXPECT_EQ(static_cast<uint32>(img(i, j).G()), j);
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} else {
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EXPECT_EQ(static_cast<uint32>(img(i, j).G()), j-1);
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}
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}
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}
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}
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TEST(Image, BilinearUpscaleMaintainsPixels) {
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srand(0xabd1ca7e);
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const uint32 w = 4;
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const uint32 h = 4;
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FasTC::Pixel pxs[16];
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for(uint32 i = 0; i < w; i++) {
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for(uint32 j = 0; j < h; j++) {
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pxs[j*w + i].R() = rand() % 256;
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pxs[j*w + i].G() = rand() % 256;
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pxs[j*w + i].B() = rand() % 256;
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pxs[j*w + i].A() = rand() % 256;
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}
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}
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PVRTCC::Image img(w, h, pxs);
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img.BilinearUpscale(2, 2, PVRTCC::eWrapMode_Clamp);
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EXPECT_EQ(img.GetWidth(), w << 2);
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EXPECT_EQ(img.GetHeight(), h << 2);
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for(uint32 i = 2; i < img.GetWidth(); i+=4) {
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for(uint32 j = 2; j < img.GetHeight(); j+=4) {
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FasTC::Pixel p = img(i, j);
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uint32 idx = ((j - 2) / 4) * w + ((i-2)/4);
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EXPECT_EQ(PixelPrinter(p.Pack()), PixelPrinter(pxs[idx].Pack()));
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}
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}
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}
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TEST(Image, NonuniformBilinearUpscale) {
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const uint32 kWidth = 4;
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const uint32 kHeight = 8;
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FasTC::Pixel pxs[kWidth * kHeight];
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for(uint32 i = 0; i < kWidth; i++) {
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for(uint32 j = 0; j < kHeight; j++) {
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pxs[j*kWidth + i].R() = i*4;
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pxs[j*kWidth + i].G() = j*2;
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}
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}
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PVRTCC::Image img(kWidth, kHeight, pxs);
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img.BilinearUpscale(2, 1, PVRTCC::eWrapMode_Clamp);
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EXPECT_EQ(img.GetWidth(), static_cast<uint32>(kWidth << 2));
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EXPECT_EQ(img.GetHeight(), static_cast<uint32>(kHeight << 1));
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for(uint32 i = 0; i < img.GetWidth(); i++) {
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for(uint32 j = 0; j < img.GetHeight(); j++) {
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if(i <= 2) {
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EXPECT_EQ(img(i, j).R(), 0);
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} else if(i == 15) {
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EXPECT_EQ(img(i, j).R(), 12);
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} else {
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EXPECT_EQ(static_cast<uint32>(img(i, j).R()), i-2);
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}
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if(j == 0) {
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EXPECT_EQ(img(i, j).G(), 0);
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} else {
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EXPECT_EQ(static_cast<uint32>(img(i, j).G()), j-1);
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}
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}
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}
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}
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TEST(Image, BilinearUpscaleWrapped) {
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FasTC::Pixel pxs[16];
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// Make sure that our bit depth is less than full...
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for(uint32 i = 0; i < 16; i++) {
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const uint8 newBitDepth[4] = { 6, 5, 6, 5 };
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pxs[i].ChangeBitDepth(newBitDepth);
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}
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for(uint32 i = 0; i < 4; i++) {
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for(uint32 j = 0; j < 4; j++) {
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pxs[j*4 + i].R() = i*4;
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pxs[j*4 + i].G() = j*4;
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}
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}
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PVRTCC::Image img(4, 4, pxs);
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img.BilinearUpscale(2, 2, PVRTCC::eWrapMode_Wrap);
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EXPECT_EQ(img.GetWidth(), static_cast<uint32>(16));
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EXPECT_EQ(img.GetHeight(), static_cast<uint32>(16));
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for(uint32 i = 0; i < img.GetWidth(); i++) {
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for(uint32 j = 0; j < img.GetHeight(); j++) {
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const FasTC::Pixel &p = img(i, j);
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// First make sure that the bit depth didn't change
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uint8 depth[4];
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p.GetBitDepth(depth);
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EXPECT_EQ(depth[0], 6);
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EXPECT_EQ(depth[1], 5);
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EXPECT_EQ(depth[2], 6);
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EXPECT_EQ(depth[3], 5);
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// Now make sure that the values are correct.
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if(i == 0) {
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EXPECT_EQ(p.R(), 6);
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} else if(i == 1) {
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EXPECT_EQ(p.R(), 3);
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} else if(i == 15) {
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EXPECT_EQ(p.R(), 9);
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} else {
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EXPECT_EQ(static_cast<uint32>(p.R()), i-2);
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}
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if(j == 0) {
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EXPECT_EQ(p.G(), 6);
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} else if(j == 1) {
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EXPECT_EQ(p.G(), 3);
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} else if(j == 15) {
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EXPECT_EQ(p.G(), 9);
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} else {
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EXPECT_EQ(static_cast<uint32>(p.G()), j-2);
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}
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}
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}
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}
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TEST(Image, AverageDownscale) {
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PVRTCC::Image img(8, 8);
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for(uint32 j = 0; j < img.GetHeight(); j++) {
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for(uint32 i = 0; i < img.GetWidth(); i++) {
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if((i ^ j) & 1) {
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img(i, j) = FasTC::Pixel(0xFF000000);
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} else {
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img(i, j) = FasTC::Pixel(0xFFFFFFFF);
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}
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}
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}
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img.AverageDownscale(1, 2);
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EXPECT_EQ(img.GetWidth(), static_cast<uint32>(4));
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EXPECT_EQ(img.GetHeight(), static_cast<uint32>(2));
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for(uint32 j = 0; j < img.GetHeight(); j++) {
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for(uint32 i = 0; i < img.GetWidth(); i++) {
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EXPECT_EQ(PixelPrinter(0xFF7F7F7F), PixelPrinter(img(i, j).Pack()));
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}
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}
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}
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TEST(Image, ContentAwareDownscale) {
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PVRTCC::Image img(8, 8);
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for(uint32 j = 0; j < img.GetHeight(); j++) {
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for(uint32 i = 0; i < img.GetWidth(); i++) {
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if(j < 4) {
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img(i, j) = FasTC::Pixel( 0xFF000000 );
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} else {
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img(i, j) = FasTC::Pixel( 0xFF0000FF );
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}
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}
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}
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img.ContentAwareDownscale(1, 1);
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EXPECT_EQ(img.GetWidth(), static_cast<uint32>(4));
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EXPECT_EQ(img.GetHeight(), static_cast<uint32>(4));
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for(uint32 j = 0; j < img.GetHeight(); j++) {
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for(uint32 i = 0; i < img.GetWidth(); i++) {
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if(j < 2) {
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EXPECT_EQ(img(i, j).R(), 0);
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} else {
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EXPECT_EQ(img(i, j).R(), 255);
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}
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}
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}
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}
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TEST(Image, ChangeBitDepth) {
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PVRTCC::Image img(4, 4);
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uint8 testDepth[4] = { 2, 3, 5, 0 };
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img.ChangeBitDepth(testDepth);
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uint8 depth[4];
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for(uint32 j = 0; j < img.GetHeight(); j++) {
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for(uint32 i = 0; i < img.GetWidth(); i++) {
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img(i, j).GetBitDepth(depth);
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for(int d = 0; d < 4; d++) {
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EXPECT_EQ(testDepth[d], depth[d]);
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}
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}
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}
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}
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