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bc5dd8dd0f
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.
42 lines
1.4 KiB
C++
42 lines
1.4 KiB
C++
/*
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* Copyright (c) 2022, Luke Wilde <lukew@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibGL/GL/gl.h>
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#include <LibGL/GLContext.h>
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#include <LibTest/TestCase.h>
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static NonnullOwnPtr<GL::GLContext> create_testing_context()
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{
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auto bitmap = MUST(Gfx::Bitmap::try_create(Gfx::BitmapFormat::BGRx8888, { 1, 1 }));
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auto context = GL::create_context(*bitmap);
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GL::make_context_current(context);
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return context;
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}
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TEST_CASE(0001_gl_gen_textures_does_not_return_the_same_texture_name_twice_unless_deleted)
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{
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// https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGenTextures.xhtml
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// "Texture names returned by a call to glGenTextures are not returned by subsequent calls, unless they are first deleted with glDeleteTextures."
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auto context = create_testing_context();
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GLuint texture1 = 0;
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GLuint texture2 = 0;
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glGenTextures(1, &texture1);
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// glDeleteTextures previously did not check that the texture name was allocated by glGenTextures before adding it to the free texture name list.
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// 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
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// same texture name twice in a row.
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glDeleteTextures(1, &texture1);
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glDeleteTextures(1, &texture1);
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texture1 = 0;
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glGenTextures(1, &texture1);
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glGenTextures(1, &texture2);
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EXPECT_NE(texture1, texture2);
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}
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