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LibGL: Implement a basic OpenGL 1.x compatible library

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This currently (obviously) doesn't support any actual 3D hardware,
hence all calls are done via software rendering.

Note that any modern constructs such as shaders are unsupported,
as this driver only implements Fixed Function Pipeline functionality.

The library is split into a base GLContext interface and a software
based renderer implementation of said interface. The global glXXX
functions serve as an OpenGL compatible c-style interface to the
currently bound context instance.

Co-authored-by: Stephan Unverwerth <s.unverwerth@gmx.de>
This commit is contained in:
Jesse Buhagiar 2021-01-06 22:58:01 +11:00 • committed by Andreas Kling
parent 1424c4651f
commit 4807d32139
14 changed files with 920 additions and 0 deletions
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31
Userland/Libraries/LibGL/GLUtils.cpp Normal file
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/*
* Copyright (c) 2021, Jesse Buhagiar <jooster669@gmail.com>
* Copyright (c) 2021, Stephan Unverwerth <s.unverwerth@gmx.de>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "GL/gl.h"
#include "GLContext.h"
extern GL::GLContext* g_gl_context;
void glClear(GLbitfield mask)
{
g_gl_context->gl_clear(mask);
}
void glClearColor(GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha)
{
g_gl_context->gl_clear_color(red, green, blue, alpha);
}
GLubyte* glGetString(GLenum name)
{
return g_gl_context->gl_get_string(name);
}
void glViewport(GLint x, GLint y, GLsizei width, GLsizei height)
{
g_gl_context->gl_viewport(x, y, width, height);
}