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- /*
- * Copyright (c) 2022, Luke Wilde <lukew@serenityos.org>
- *
- * SPDX-License-Identifier: BSD-2-Clause
- */
- #include <LibGL/GL/gl.h>
- #include <LibGL/GLContext.h>
- #include <LibTest/TestCase.h>
- static NonnullOwnPtr<GL::GLContext> create_testing_context()
- {
- auto bitmap = MUST(Gfx::Bitmap::try_create(Gfx::BitmapFormat::BGRx8888, { 1, 1 }));
- auto context = MUST(GL::create_context(*bitmap));
- GL::make_context_current(context);
- return context;
- }
- TEST_CASE(0001_gl_gen_textures_does_not_return_the_same_texture_name_twice_unless_deleted)
- {
- // https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGenTextures.xhtml
- // "Texture names returned by a call to glGenTextures are not returned by subsequent calls, unless they are first deleted with glDeleteTextures."
- auto context = create_testing_context();
- GLuint texture1 = 0;
- GLuint texture2 = 0;
- glGenTextures(1, &texture1);
- // glDeleteTextures previously did not check that the texture name was allocated by glGenTextures before adding it to the free texture name list.
- // This means that if you delete a texture twice in a row, the name will appear twice in the free texture list, making glGenTextures return the
- // same texture name twice in a row.
- glDeleteTextures(1, &texture1);
- glDeleteTextures(1, &texture1);
- texture1 = 0;
- glGenTextures(1, &texture1);
- glGenTextures(1, &texture2);
- EXPECT_NE(texture1, texture2);
- }
- TEST_CASE(0002_gl_cull_face_does_not_accept_left_and_right)
- {
- auto context = create_testing_context();
- // glCullFace only accepts GL_FRONT, GL_BACK and GL_FRONT_AND_BACK. We checked if the mode was valid by performing cull_mode < GL_FRONT || cull_mode > GL_FRONT_AND_BACK.
- // However, this range also contains GL_LEFT and GL_RIGHT, which we would accept when we should return a GL_INVALID_ENUM error.
- glCullFace(GL_LEFT);
- EXPECT_EQ(glGetError(), static_cast<GLenum>(GL_INVALID_ENUM));
- glCullFace(GL_RIGHT);
- EXPECT_EQ(glGetError(), static_cast<GLenum>(GL_INVALID_ENUM));
- }
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