Add a test suite for the Image class
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Manolis Papadeas
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2ba66c1457
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7a918bacca
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/*************************************************************************/
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/* test_image.h */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifndef TEST_IMAGE_H
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#define TEST_IMAGE_H
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#include "core/io/file_access_pack.h"
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#include "core/io/image.h"
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#include "test_utils.h"
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#include "thirdparty/doctest/doctest.h"
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namespace TestImage {
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TEST_CASE("[Image] Instantiation") {
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Ref<Image> image = memnew(Image(8, 4, false, Image::FORMAT_RGBA8));
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CHECK_MESSAGE(
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!image->is_empty(),
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"An image created with specified size and format should not be empty at first.");
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CHECK_MESSAGE(
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image->is_invisible(),
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"A newly created image should be invisible.");
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CHECK_MESSAGE(
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!image->is_compressed(),
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"A newly created image should not be compressed.");
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CHECK(!image->has_mipmaps());
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Ref<Image> image_copy = memnew(Image());
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CHECK_MESSAGE(
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image_copy->is_empty(),
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"An image created without any specified size and format be empty at first.");
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image_copy->copy_internals_from(image);
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CHECK_MESSAGE(
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image->get_data() == image_copy->get_data(),
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"Duplicated images should have the same data.");
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PackedByteArray image_data = image->get_data();
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Ref<Image> image_from_data = memnew(Image(8, 4, false, Image::FORMAT_RGBA8, image_data));
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CHECK_MESSAGE(
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image->get_data() == image_from_data->get_data(),
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"An image created from data of another image should have the same data of the original image.");
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}
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TEST_CASE("[Image] Saving and loading") {
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Ref<Image> image = memnew(Image(4, 4, false, Image::FORMAT_RGBA8));
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const String save_path_png = OS::get_singleton()->get_cache_path().plus_file("image.png");
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const String save_path_exr = OS::get_singleton()->get_cache_path().plus_file("image.exr");
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// Save PNG
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Error err;
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err = image->save_png(save_path_png);
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CHECK_MESSAGE(
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err == OK,
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"The image should be saved successfully as a .png file.");
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// Save EXR
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err = image->save_exr(save_path_exr, false);
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CHECK_MESSAGE(
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err == OK,
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"The image should be saved successfully as an .exr file.");
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// Load using load()
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Ref<Image> image_load = memnew(Image());
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err = image_load->load(save_path_png);
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CHECK_MESSAGE(
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err == OK,
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"The image should load successfully using load().");
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CHECK_MESSAGE(
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image->get_data() == image_load->get_data(),
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"The loaded image should have the same data as the one that got saved.");
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// Load BMP
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Ref<Image> image_bmp = memnew(Image());
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FileAccessRef f_bmp = FileAccess::open(TestUtils::get_data_path("images/icon.bmp"), FileAccess::READ, &err);
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PackedByteArray data_bmp;
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data_bmp.resize(f_bmp->get_len() + 1);
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f_bmp->get_buffer(data_bmp.ptrw(), f_bmp->get_len());
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CHECK_MESSAGE(
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image_bmp->load_bmp_from_buffer(data_bmp) == OK,
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"The BMP image should load successfully.");
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// Load JPG
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Ref<Image> image_jpg = memnew(Image());
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FileAccessRef f_jpg = FileAccess::open(TestUtils::get_data_path("images/icon.jpg"), FileAccess::READ, &err);
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PackedByteArray data_jpg;
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data_jpg.resize(f_jpg->get_len() + 1);
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f_jpg->get_buffer(data_jpg.ptrw(), f_jpg->get_len());
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CHECK_MESSAGE(
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image_jpg->load_jpg_from_buffer(data_jpg) == OK,
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"The JPG image should load successfully.");
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// Load WEBP
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Ref<Image> image_webp = memnew(Image());
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FileAccessRef f_webp = FileAccess::open(TestUtils::get_data_path("images/icon.webp"), FileAccess::READ, &err);
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PackedByteArray data_webp;
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data_webp.resize(f_webp->get_len() + 1);
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f_webp->get_buffer(data_webp.ptrw(), f_webp->get_len());
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CHECK_MESSAGE(
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image_webp->load_webp_from_buffer(data_webp) == OK,
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"The WEBP image should load successfully.");
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// Load PNG
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Ref<Image> image_png = memnew(Image());
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FileAccessRef f_png = FileAccess::open(TestUtils::get_data_path("images/icon.png"), FileAccess::READ, &err);
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PackedByteArray data_png;
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data_png.resize(f_png->get_len() + 1);
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f_png->get_buffer(data_png.ptrw(), f_png->get_len());
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CHECK_MESSAGE(
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image_png->load_png_from_buffer(data_png) == OK,
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"The PNG image should load successfully.");
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// Load TGA
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Ref<Image> image_tga = memnew(Image());
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FileAccessRef f_tga = FileAccess::open(TestUtils::get_data_path("images/icon.tga"), FileAccess::READ, &err);
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PackedByteArray data_tga;
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data_tga.resize(f_tga->get_len() + 1);
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f_tga->get_buffer(data_tga.ptrw(), f_tga->get_len());
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CHECK_MESSAGE(
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image_tga->load_tga_from_buffer(data_tga) == OK,
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"The TGA image should load successfully.");
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}
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TEST_CASE("[Image] Basic getters") {
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Ref<Image> image = memnew(Image(8, 4, false, Image::FORMAT_LA8));
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CHECK(image->get_width() == 8);
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CHECK(image->get_height() == 4);
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CHECK(image->get_size() == Vector2(8, 4));
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CHECK(image->get_format() == Image::FORMAT_LA8);
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CHECK(image->get_used_rect() == Rect2(0, 0, 0, 0));
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Ref<Image> image_get_rect = image->get_rect(Rect2(0, 0, 2, 1));
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CHECK(image_get_rect->get_size() == Vector2(2, 1));
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}
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TEST_CASE("[Image] Resizing") {
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Ref<Image> image = memnew(Image(8, 8, false, Image::FORMAT_RGBA8));
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// Crop
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image->crop(4, 4);
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CHECK_MESSAGE(
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image->get_size() == Vector2(4, 4),
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"get_size() should return the correct size after cropping.");
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image->set_pixel(0, 0, Color(1, 1, 1, 1));
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// Resize
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for (int i = 0; i < 5; i++) {
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Ref<Image> image_resized = memnew(Image());
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image_resized->copy_internals_from(image);
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Image::Interpolation interpolation = static_cast<Image::Interpolation>(i);
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image_resized->resize(8, 8, interpolation);
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CHECK_MESSAGE(
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image_resized->get_size() == Vector2(8, 8),
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"get_size() should return the correct size after resizing.");
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CHECK_MESSAGE(
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image_resized->get_pixel(1, 1).a > 0,
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"Resizing an image should also affect its content.");
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}
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// shrink_x2()
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image->shrink_x2();
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CHECK_MESSAGE(
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image->get_size() == Vector2(2, 2),
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"get_size() should return the correct size after shrink_x2().");
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// resize_to_po2()
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Ref<Image> image_po_2 = memnew(Image(14, 28, false, Image::FORMAT_RGBA8));
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image_po_2->resize_to_po2();
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CHECK_MESSAGE(
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image_po_2->get_size() == Vector2(16, 32),
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"get_size() should return the correct size after resize_to_po2().");
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}
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TEST_CASE("[Image] Modifying pixels of an image") {
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Ref<Image> image = memnew(Image(3, 3, false, Image::FORMAT_RGBA8));
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image->set_pixel(0, 0, Color(1, 1, 1, 1));
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CHECK_MESSAGE(
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!image->is_invisible(),
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"Image should not be invisible after drawing on it.");
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CHECK_MESSAGE(
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image->get_pixelv(Vector2(0, 0)).is_equal_approx(Color(1, 1, 1, 1)),
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"Image's get_pixel() should return the same color value as the one being set with set_pixel() in the same position.");
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CHECK_MESSAGE(
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image->get_used_rect() == Rect2(0, 0, 1, 1),
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"Image's get_used_rect should return the expected value, larger than Rect2(0, 0, 0, 0) if it's visible.");
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image->set_pixelv(Vector2(0, 0), Color(0.5, 0.5, 0.5, 0.5));
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Ref<Image> image2 = memnew(Image(3, 3, false, Image::FORMAT_RGBA8));
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// Fill image with color
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image2->fill(Color(0.5, 0.5, 0.5, 0.5));
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for (int x = 0; x < image2->get_width(); x++) {
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for (int y = 0; y < image2->get_height(); y++) {
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CHECK_MESSAGE(
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image2->get_pixel(x, y).r > 0.49,
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"fill() should colorize all pixels of the image.");
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}
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}
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// Blend two images together
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image->blend_rect(image2, Rect2(Vector2(0, 0), image2->get_size()), Vector2(0, 0));
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CHECK_MESSAGE(
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image->get_pixel(0, 0).a > 0.7,
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"blend_rect() should blend the alpha values of the two images.");
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CHECK_MESSAGE(
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image->get_used_rect().size == image->get_size(),
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"get_used_rect() should return the expected value, its Rect size should be the same as get_size() if there are no transparent pixels.");
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Ref<Image> image3 = memnew(Image(2, 2, false, Image::FORMAT_RGBA8));
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image3->set_pixel(0, 0, Color(0, 1, 0, 1));
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//blit_rect() two images together
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image->blit_rect(image3, Rect2(Vector2(0, 0), image3->get_size()), Vector2(0, 0));
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CHECK_MESSAGE(
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image->get_pixel(0, 0).is_equal_approx(Color(0, 1, 0, 1)),
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"blit_rect() should replace old colors and not blend them.");
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CHECK_MESSAGE(
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!image->get_pixel(2, 2).is_equal_approx(Color(0, 1, 0, 1)),
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"blit_rect() should not affect the area of the image that is outside src_rect.");
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// Flip image
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image3->flip_x();
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CHECK(image3->get_pixel(1, 0).is_equal_approx(Color(0, 1, 0, 1)));
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CHECK_MESSAGE(
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image3->get_pixel(0, 0).is_equal_approx(Color(0, 0, 0, 0)),
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"flip_x() should not leave old pixels behind.");
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image3->flip_y();
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CHECK(image3->get_pixel(1, 1).is_equal_approx(Color(0, 1, 0, 1)));
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CHECK_MESSAGE(
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image3->get_pixel(1, 0).is_equal_approx(Color(0, 0, 0, 0)),
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"flip_y() should not leave old pixels behind.");
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}
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} // namespace TestImage
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#endif // TEST_IMAGE_H
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@ -46,6 +46,7 @@
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#include "test_geometry_2d.h"
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#include "test_gradient.h"
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#include "test_gui.h"
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#include "test_image.h"
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#include "test_json.h"
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#include "test_list.h"
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#include "test_local_vector.h"
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