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112 lines
3.4 KiB
C++
112 lines
3.4 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::create(Gfx::BitmapFormat::BGRx8888, { 1, 1 }));
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auto context = MUST(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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TEST_CASE(0002_gl_cull_face_does_not_accept_left_and_right)
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{
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auto context = create_testing_context();
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// 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.
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// However, this range also contains GL_LEFT and GL_RIGHT, which we would accept when we should return a GL_INVALID_ENUM error.
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glCullFace(GL_LEFT);
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EXPECT_EQ(glGetError(), static_cast<GLenum>(GL_INVALID_ENUM));
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glCullFace(GL_RIGHT);
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EXPECT_EQ(glGetError(), static_cast<GLenum>(GL_INVALID_ENUM));
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}
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TEST_CASE(0003_gl_bind_buffer_names_must_be_allocated)
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{
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auto context = create_testing_context();
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glBindBuffer(GL_ARRAY_BUFFER, 123);
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EXPECT_EQ(glGetError(), static_cast<GLenum>(GL_INVALID_VALUE));
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}
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TEST_CASE(0004_gl_color_clear_value)
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{
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auto context = create_testing_context();
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Array<GLdouble, 4> clear_color;
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glGetDoublev(GL_COLOR_CLEAR_VALUE, clear_color.data());
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EXPECT_EQ(clear_color[0], 0.);
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EXPECT_EQ(clear_color[1], 0.);
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EXPECT_EQ(clear_color[2], 0.);
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EXPECT_EQ(clear_color[3], 0.);
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glClearColor(.1f, .2f, .3f, .4f);
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glGetDoublev(GL_COLOR_CLEAR_VALUE, clear_color.data());
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EXPECT_APPROXIMATE(clear_color[0], .1);
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EXPECT_APPROXIMATE(clear_color[1], .2);
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EXPECT_APPROXIMATE(clear_color[2], .3);
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EXPECT_APPROXIMATE(clear_color[3], .4);
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}
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TEST_CASE(0005_gl_depth_clear_value)
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{
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auto context = create_testing_context();
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GLdouble clear_depth;
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glGetDoublev(GL_DEPTH_CLEAR_VALUE, &clear_depth);
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EXPECT_EQ(clear_depth, 1.);
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glClearDepth(.1f);
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glGetDoublev(GL_DEPTH_CLEAR_VALUE, &clear_depth);
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EXPECT_APPROXIMATE(clear_depth, .1);
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}
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TEST_CASE(0006_gl_stencil_clear_value)
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{
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auto context = create_testing_context();
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GLint clear_stencil;
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glGetIntegerv(GL_STENCIL_CLEAR_VALUE, &clear_stencil);
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EXPECT_EQ(clear_stencil, 0);
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glClearStencil(255);
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glGetIntegerv(GL_STENCIL_CLEAR_VALUE, &clear_stencil);
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EXPECT_EQ(clear_stencil, 255);
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}
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