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godot/tests/core/io/test_image.h

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/**************************************************************************/
/* test_image.h */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/**************************************************************************/
#ifndef TEST_IMAGE_H
#define TEST_IMAGE_H
#include "core/io/image.h"
#include "core/os/os.h"
#include "tests/test_utils.h"
#include "thirdparty/doctest/doctest.h"
namespace TestImage {
TEST_CASE("[Image] Instantiation") {
Ref<Image> image = memnew(Image(8, 4, false, Image::FORMAT_RGBA8));
CHECK_MESSAGE(
!image->is_empty(),
"An image created with specified size and format should not be empty at first.");
CHECK_MESSAGE(
image->is_invisible(),
"A newly created image should be invisible.");
CHECK_MESSAGE(
!image->is_compressed(),
"A newly created image should not be compressed.");
CHECK(!image->has_mipmaps());
PackedByteArray image_data = image->get_data();
for (int i = 0; i < image_data.size(); i++) {
CHECK_MESSAGE(
image_data[i] == 0,
"An image created without data specified should have its data zeroed out.");
}
Ref<Image> image_copy = memnew(Image());
CHECK_MESSAGE(
image_copy->is_empty(),
"An image created without any specified size and format be empty at first.");
image_copy->copy_internals_from(image);
CHECK_MESSAGE(
image->get_data() == image_copy->get_data(),
"Duplicated images should have the same data.");
image_data = image->get_data();
Ref<Image> image_from_data = memnew(Image(8, 4, false, Image::FORMAT_RGBA8, image_data));
CHECK_MESSAGE(
image->get_data() == image_from_data->get_data(),
"An image created from data of another image should have the same data of the original image.");
}
TEST_CASE("[Image] Saving and loading") {
Ref<Image> image = memnew(Image(4, 4, false, Image::FORMAT_RGBA8));
const String save_path_png = OS::get_singleton()->get_cache_path().path_join("image.png");
const String save_path_exr = OS::get_singleton()->get_cache_path().path_join("image.exr");
// Save PNG
Error err;
err = image->save_png(save_path_png);
CHECK_MESSAGE(
err == OK,
"The image should be saved successfully as a .png file.");
// Save EXR
err = image->save_exr(save_path_exr, false);
CHECK_MESSAGE(
err == OK,
"The image should be saved successfully as an .exr file.");
// Load using load()
Ref<Image> image_load = memnew(Image());
err = image_load->load(save_path_png);
CHECK_MESSAGE(
err == OK,
"The image should load successfully using load().");
CHECK_MESSAGE(
image->get_data() == image_load->get_data(),
"The loaded image should have the same data as the one that got saved.");
// Load BMP
Ref<Image> image_bmp = memnew(Image());
Ref<FileAccess> f_bmp = FileAccess::open(TestUtils::get_data_path("images/icon.bmp"), FileAccess::READ, &err);
REQUIRE(!f_bmp.is_null());
PackedByteArray data_bmp;
data_bmp.resize(f_bmp->get_length() + 1);
f_bmp->get_buffer(data_bmp.ptrw(), f_bmp->get_length());
CHECK_MESSAGE(
image_bmp->load_bmp_from_buffer(data_bmp) == OK,
"The BMP image should load successfully.");
// Load JPG
Ref<Image> image_jpg = memnew(Image());
Ref<FileAccess> f_jpg = FileAccess::open(TestUtils::get_data_path("images/icon.jpg"), FileAccess::READ, &err);
REQUIRE(!f_jpg.is_null());
PackedByteArray data_jpg;
data_jpg.resize(f_jpg->get_length() + 1);
f_jpg->get_buffer(data_jpg.ptrw(), f_jpg->get_length());
CHECK_MESSAGE(
image_jpg->load_jpg_from_buffer(data_jpg) == OK,
"The JPG image should load successfully.");
// Load WebP
Ref<Image> image_webp = memnew(Image());
Ref<FileAccess> f_webp = FileAccess::open(TestUtils::get_data_path("images/icon.webp"), FileAccess::READ, &err);
REQUIRE(!f_webp.is_null());
PackedByteArray data_webp;
data_webp.resize(f_webp->get_length() + 1);
f_webp->get_buffer(data_webp.ptrw(), f_webp->get_length());
CHECK_MESSAGE(
image_webp->load_webp_from_buffer(data_webp) == OK,
"The WebP image should load successfully.");
// Load PNG
Ref<Image> image_png = memnew(Image());
Ref<FileAccess> f_png = FileAccess::open(TestUtils::get_data_path("images/icon.png"), FileAccess::READ, &err);
REQUIRE(!f_png.is_null());
PackedByteArray data_png;
data_png.resize(f_png->get_length() + 1);
f_png->get_buffer(data_png.ptrw(), f_png->get_length());
CHECK_MESSAGE(
image_png->load_png_from_buffer(data_png) == OK,
"The PNG image should load successfully.");
// Load TGA
Ref<Image> image_tga = memnew(Image());
Ref<FileAccess> f_tga = FileAccess::open(TestUtils::get_data_path("images/icon.tga"), FileAccess::READ, &err);
REQUIRE(!f_tga.is_null());
PackedByteArray data_tga;
data_tga.resize(f_tga->get_length() + 1);
f_tga->get_buffer(data_tga.ptrw(), f_tga->get_length());
CHECK_MESSAGE(
image_tga->load_tga_from_buffer(data_tga) == OK,
"The TGA image should load successfully.");
}
TEST_CASE("[Image] Basic getters") {
Ref<Image> image = memnew(Image(8, 4, false, Image::FORMAT_LA8));
CHECK(image->get_width() == 8);
CHECK(image->get_height() == 4);
CHECK(image->get_size() == Vector2(8, 4));
CHECK(image->get_format() == Image::FORMAT_LA8);
CHECK(image->get_used_rect() == Rect2i(0, 0, 0, 0));
Ref<Image> image_get_rect = image->get_region(Rect2i(0, 0, 2, 1));
CHECK(image_get_rect->get_size() == Vector2(2, 1));
}
TEST_CASE("[Image] Resizing") {
Ref<Image> image = memnew(Image(8, 8, false, Image::FORMAT_RGBA8));
// Crop
image->crop(4, 4);
CHECK_MESSAGE(
image->get_size() == Vector2(4, 4),
"get_size() should return the correct size after cropping.");
image->set_pixel(0, 0, Color(1, 1, 1, 1));
// Resize
for (int i = 0; i < 5; i++) {
Ref<Image> image_resized = memnew(Image());
image_resized->copy_internals_from(image);
Image::Interpolation interpolation = static_cast<Image::Interpolation>(i);
image_resized->resize(8, 8, interpolation);
CHECK_MESSAGE(
image_resized->get_size() == Vector2(8, 8),
"get_size() should return the correct size after resizing.");
CHECK_MESSAGE(
image_resized->get_pixel(1, 1).a > 0,
"Resizing an image should also affect its content.");
}
// shrink_x2()
image->shrink_x2();
CHECK_MESSAGE(
image->get_size() == Vector2(2, 2),
"get_size() should return the correct size after shrink_x2().");
// resize_to_po2()
Ref<Image> image_po_2 = memnew(Image(14, 28, false, Image::FORMAT_RGBA8));
image_po_2->resize_to_po2();
CHECK_MESSAGE(
image_po_2->get_size() == Vector2(16, 32),
"get_size() should return the correct size after resize_to_po2().");
}
TEST_CASE("[Image] Modifying pixels of an image") {
Ref<Image> image = memnew(Image(3, 3, false, Image::FORMAT_RGBA8));
image->set_pixel(0, 0, Color(1, 1, 1, 1));
CHECK_MESSAGE(
!image->is_invisible(),
"Image should not be invisible after drawing on it.");
CHECK_MESSAGE(
image->get_pixelv(Vector2(0, 0)).is_equal_approx(Color(1, 1, 1, 1)),
"Image's get_pixel() should return the same color value as the one being set with set_pixel() in the same position.");
CHECK_MESSAGE(
image->get_used_rect() == Rect2i(0, 0, 1, 1),
"Image's get_used_rect should return the expected value, larger than Rect2i(0, 0, 0, 0) if it's visible.");
image->set_pixelv(Vector2(0, 0), Color(0.5, 0.5, 0.5, 0.5));
Ref<Image> image2 = memnew(Image(3, 3, false, Image::FORMAT_RGBA8));
// Fill image with color
image2->fill(Color(0.5, 0.5, 0.5, 0.5));
for (int y = 0; y < image2->get_height(); y++) {
for (int x = 0; x < image2->get_width(); x++) {
CHECK_MESSAGE(
image2->get_pixel(x, y).r > 0.49,
"fill() should colorize all pixels of the image.");
}
}
// Fill rect with color
{
const int img_width = 3;
const int img_height = 3;
Vector<Rect2i> rects;
rects.push_back(Rect2i());
rects.push_back(Rect2i(-5, -5, 3, 3));
rects.push_back(Rect2i(img_width, 0, 12, 12));
rects.push_back(Rect2i(0, img_height, 12, 12));
rects.push_back(Rect2i(img_width + 1, img_height + 2, 12, 12));
rects.push_back(Rect2i(1, 1, 1, 1));
rects.push_back(Rect2i(0, 1, 2, 3));
rects.push_back(Rect2i(-5, 0, img_width + 10, 2));
rects.push_back(Rect2i(0, -5, 2, img_height + 10));
rects.push_back(Rect2i(-1, -1, img_width + 1, img_height + 1));
for (const Rect2i &rect : rects) {
Ref<Image> img = memnew(Image(img_width, img_height, false, Image::FORMAT_RGBA8));
img->fill_rect(rect, Color(1, 1, 1, 1));
for (int y = 0; y < img->get_height(); y++) {
for (int x = 0; x < img->get_width(); x++) {
if (rect.abs().has_point(Point2(x, y))) {
CHECK_MESSAGE(
img->get_pixel(x, y).is_equal_approx(Color(1, 1, 1, 1)),
"fill_rect() should colorize all image pixels within rect bounds.");
} else {
CHECK_MESSAGE(
!img->get_pixel(x, y).is_equal_approx(Color(1, 1, 1, 1)),
"fill_rect() shouldn't colorize any image pixel out of rect bounds.");
}
}
}
}
}
// Blend two images together
image->blend_rect(image2, Rect2i(Vector2i(0, 0), image2->get_size()), Vector2i(0, 0));
CHECK_MESSAGE(
image->get_pixel(0, 0).a > 0.7,
"blend_rect() should blend the alpha values of the two images.");
CHECK_MESSAGE(
image->get_used_rect().size == image->get_size(),
"get_used_rect() should return the expected value, its Rect size should be the same as get_size() if there are no transparent pixels.");
Ref<Image> image3 = memnew(Image(2, 2, false, Image::FORMAT_RGBA8));
image3->set_pixel(0, 0, Color(0, 1, 0, 1));
//blit_rect() two images together
image->blit_rect(image3, Rect2i(Vector2i(0, 0), image3->get_size()), Vector2i(0, 0));
CHECK_MESSAGE(
image->get_pixel(0, 0).is_equal_approx(Color(0, 1, 0, 1)),
"blit_rect() should replace old colors and not blend them.");
CHECK_MESSAGE(
!image->get_pixel(2, 2).is_equal_approx(Color(0, 1, 0, 1)),
"blit_rect() should not affect the area of the image that is outside src_rect.");
// Flip image
image3->flip_x();
CHECK(image3->get_pixel(1, 0).is_equal_approx(Color(0, 1, 0, 1)));
CHECK_MESSAGE(
image3->get_pixel(0, 0).is_equal_approx(Color(0, 0, 0, 0)),
"flip_x() should not leave old pixels behind.");
image3->flip_y();
CHECK(image3->get_pixel(1, 1).is_equal_approx(Color(0, 1, 0, 1)));
CHECK_MESSAGE(
image3->get_pixel(1, 0).is_equal_approx(Color(0, 0, 0, 0)),
"flip_y() should not leave old pixels behind.");
// Pre-multiply Alpha then Convert from RGBA to L8, checking alpha
{
Ref<Image> gray_image = memnew(Image(3, 3, false, Image::FORMAT_RGBA8));
gray_image->fill_rect(Rect2i(0, 0, 3, 3), Color(1, 1, 1, 0));
gray_image->set_pixel(1, 1, Color(1, 1, 1, 1));
gray_image->set_pixel(1, 2, Color(0.5, 0.5, 0.5, 0.5));
gray_image->set_pixel(2, 1, Color(0.25, 0.05, 0.5, 1.0));
gray_image->set_pixel(2, 2, Color(0.5, 0.25, 0.95, 0.75));
gray_image->premultiply_alpha();
gray_image->convert(Image::FORMAT_L8);
CHECK_MESSAGE(gray_image->get_pixel(0, 0).is_equal_approx(Color(0, 0, 0, 1)), "convert() RGBA to L8 should be black.");
CHECK_MESSAGE(gray_image->get_pixel(0, 1).is_equal_approx(Color(0, 0, 0, 1)), "convert() RGBA to L8 should be black.");
CHECK_MESSAGE(gray_image->get_pixel(0, 2).is_equal_approx(Color(0, 0, 0, 1)), "convert() RGBA to L8 should be black.");
CHECK_MESSAGE(gray_image->get_pixel(1, 0).is_equal_approx(Color(0, 0, 0, 1)), "convert() RGBA to L8 should be black.");
CHECK_MESSAGE(gray_image->get_pixel(1, 1).is_equal_approx(Color(1, 1, 1, 1)), "convert() RGBA to L8 should be white.");
CHECK_MESSAGE(gray_image->get_pixel(1, 2).is_equal_approx(Color(0.250980407, 0.250980407, 0.250980407, 1)), "convert() RGBA to L8 should be around 0.250980407 (64).");
CHECK_MESSAGE(gray_image->get_pixel(2, 0).is_equal_approx(Color(0, 0, 0, 1)), "convert() RGBA to L8 should be black.");
CHECK_MESSAGE(gray_image->get_pixel(2, 1).is_equal_approx(Color(0.121568628, 0.121568628, 0.121568628, 1)), "convert() RGBA to L8 should be around 0.121568628 (31).");
CHECK_MESSAGE(gray_image->get_pixel(2, 2).is_equal_approx(Color(0.266666681, 0.266666681, 0.266666681, 1)), "convert() RGBA to L8 should be around 0.266666681 (68).");
}
}
TEST_CASE("[Image] Custom mipmaps") {
Ref<Image> image = memnew(Image(100, 100, false, Image::FORMAT_RGBA8));
REQUIRE(!image->has_mipmaps());
image->generate_mipmaps();
REQUIRE(image->has_mipmaps());
const int mipmaps = image->get_mipmap_count() + 1;
REQUIRE(mipmaps == 7);
// Initialize reference mipmap data.
// Each byte is given value "mipmap_index * 5".
{
PackedByteArray data = image->get_data();
uint8_t *data_ptr = data.ptrw();
for (int mip = 0; mip < mipmaps; mip++) {
int mip_offset = 0;
int mip_size = 0;
image->get_mipmap_offset_and_size(mip, mip_offset, mip_size);
for (int i = 0; i < mip_size; i++) {
data_ptr[mip_offset + i] = mip * 5;
}
}
image->set_data(image->get_width(), image->get_height(), image->has_mipmaps(), image->get_format(), data);
}
// Byte format conversion.
for (int format = Image::FORMAT_L8; format <= Image::FORMAT_RGBA8; format++) {
Ref<Image> image_bytes = memnew(Image());
image_bytes->copy_internals_from(image);
image_bytes->convert((Image::Format)format);
REQUIRE(image_bytes->has_mipmaps());
PackedByteArray data = image_bytes->get_data();
const uint8_t *data_ptr = data.ptr();
for (int mip = 0; mip < mipmaps; mip++) {
int mip_offset = 0;
int mip_size = 0;
image_bytes->get_mipmap_offset_and_size(mip, mip_offset, mip_size);
for (int i = 0; i < mip_size; i++) {
if (data_ptr[mip_offset + i] != mip * 5) {
REQUIRE_MESSAGE(false, "Byte format conversion error.");
}
}
}
}
// Floating point format conversion.
for (int format = Image::FORMAT_RF; format <= Image::FORMAT_RGBAF; format++) {
Ref<Image> image_rgbaf = memnew(Image());
image_rgbaf->copy_internals_from(image);
image_rgbaf->convert((Image::Format)format);
REQUIRE(image_rgbaf->has_mipmaps());
PackedByteArray data = image_rgbaf->get_data();
const uint8_t *data_ptr = data.ptr();
for (int mip = 0; mip < mipmaps; mip++) {
int mip_offset = 0;
int mip_size = 0;
image_rgbaf->get_mipmap_offset_and_size(mip, mip_offset, mip_size);
for (int i = 0; i < mip_size; i += 4) {
float value = *(float *)(data_ptr + mip_offset + i);
if (!Math::is_equal_approx(value * 255.0f, mip * 5)) {
REQUIRE_MESSAGE(false, "Floating point conversion error.");
}
}
}
}
}
TEST_CASE("[Image] Convert image") {
for (int format = Image::FORMAT_RF; format < Image::FORMAT_RGBE9995; format++) {
for (int new_format = Image::FORMAT_RF; new_format < Image::FORMAT_RGBE9995; new_format++) {
Ref<Image> image = memnew(Image(4, 4, false, (Image::Format)format));
image->convert((Image::Format)new_format);
String format_string = Image::format_names[(Image::Format)format];
String new_format_string = Image::format_names[(Image::Format)new_format];
format_string = "Error converting from " + format_string + " to " + new_format_string + ".";
CHECK_MESSAGE(image->get_format() == new_format, format_string);
}
}
Ref<Image> image = memnew(Image(4, 4, false, Image::FORMAT_RGBA8));
PackedByteArray image_data = image->get_data();
image->convert((Image::Format)-1);
CHECK_MESSAGE(image->get_data() == image_data, "Image conversion to invalid type (-1) should not alter image.");
Ref<Image> image2 = memnew(Image(4, 4, false, Image::FORMAT_RGBA8));
image_data = image2->get_data();
image2->convert((Image::Format)(Image::FORMAT_MAX + 1));
CHECK_MESSAGE(image2->get_data() == image_data, "Image conversion to invalid type (Image::FORMAT_MAX + 1) should not alter image.");
}
} // namespace TestImage
#endif // TEST_IMAGE_H
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