forked from KolibriOS/kolibrios
156 lines
5.0 KiB
C
156 lines
5.0 KiB
C
/* Cairo - a vector graphics library with display and print output
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*
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* Copyright © 2009 Eric Anholt
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* Copyright © 2009 Chris Wilson
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*
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* This library is free software; you can redistribute it and/or
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* modify it either under the terms of the GNU Lesser General Public
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* License version 2.1 as published by the Free Software Foundation
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* (the "LGPL") or, at your option, under the terms of the Mozilla
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* Public License Version 1.1 (the "MPL"). If you do not alter this
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* notice, a recipient may use your version of this file under either
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* the MPL or the LGPL.
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*
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* You should have received a copy of the LGPL along with this library
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* in the file COPYING-LGPL-2.1; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
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* You should have received a copy of the MPL along with this library
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* in the file COPYING-MPL-1.1
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*
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* The contents of this file are subject to the Mozilla Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
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* OF ANY KIND, either express or implied. See the LGPL or the MPL for
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* the specific language governing rights and limitations.
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*
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* The Original Code is the cairo graphics library.
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*
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* The Initial Developer of the Original Code is Eric Anholt.
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*/
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/*
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* cairo-gl.h:
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*
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* The cairo-gl backend provides an implementation of possibly
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* hardware-accelerated cairo rendering by targeting the OpenGL API.
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* The goal of the cairo-gl backend is to provide better performance
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* with equal functionality to cairo-image where possible. It does
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* not directly provide for applying additional OpenGL effects to
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* cairo surfaces.
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*
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* Cairo-gl allows interoperability with other GL rendering through GL
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* context sharing. Cairo-gl surfaces are created in reference to a
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* #cairo_device_t, which represents a GL context created by the user.
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* When that GL context is created with its sharePtr set to another
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* context (or vice versa), its objects (textures backing cairo-gl
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* surfaces) can be accessed in the other OpenGL context. This allows
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* cairo-gl to maintain its drawing state in one context while the
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* user's 3D rendering occurs in the user's other context.
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*
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* However, as only one context can be current to a thread at a time,
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* cairo-gl may make its context current to the thread on any cairo
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* call which interacts with a cairo-gl surface or the cairo-gl
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* device. As a result, the user must make their own context current
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* between any cairo calls and their own OpenGL rendering.
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**/
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#ifndef CAIRO_GL_H
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#define CAIRO_GL_H
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#include "cairo.h"
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#if CAIRO_HAS_GL_SURFACE || CAIRO_HAS_GLESV2_SURFACE
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CAIRO_BEGIN_DECLS
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cairo_public cairo_surface_t *
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cairo_gl_surface_create (cairo_device_t *device,
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cairo_content_t content,
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int width, int height);
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cairo_public cairo_surface_t *
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cairo_gl_surface_create_for_texture (cairo_device_t *abstract_device,
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cairo_content_t content,
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unsigned int tex,
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int width, int height);
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cairo_public void
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cairo_gl_surface_set_size (cairo_surface_t *surface, int width, int height);
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cairo_public int
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cairo_gl_surface_get_width (cairo_surface_t *abstract_surface);
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cairo_public int
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cairo_gl_surface_get_height (cairo_surface_t *abstract_surface);
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cairo_public void
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cairo_gl_surface_swapbuffers (cairo_surface_t *surface);
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cairo_public void
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cairo_gl_device_set_thread_aware (cairo_device_t *device,
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cairo_bool_t thread_aware);
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#if CAIRO_HAS_GLX_FUNCTIONS
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#include <GL/glx.h>
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cairo_public cairo_device_t *
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cairo_glx_device_create (Display *dpy, GLXContext gl_ctx);
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cairo_public Display *
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cairo_glx_device_get_display (cairo_device_t *device);
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cairo_public GLXContext
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cairo_glx_device_get_context (cairo_device_t *device);
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cairo_public cairo_surface_t *
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cairo_gl_surface_create_for_window (cairo_device_t *device,
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Window win,
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int width, int height);
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#endif
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#if CAIRO_HAS_WGL_FUNCTIONS
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#include <windows.h>
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cairo_public cairo_device_t *
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cairo_wgl_device_create (HGLRC rc);
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cairo_public HGLRC
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cairo_wgl_device_get_context (cairo_device_t *device);
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cairo_public cairo_surface_t *
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cairo_gl_surface_create_for_dc (cairo_device_t *device,
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HDC dc,
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int width,
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int height);
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#endif
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#if CAIRO_HAS_EGL_FUNCTIONS
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#include <EGL/egl.h>
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cairo_public cairo_device_t *
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cairo_egl_device_create (EGLDisplay dpy, EGLContext egl);
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cairo_public cairo_surface_t *
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cairo_gl_surface_create_for_egl (cairo_device_t *device,
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EGLSurface egl,
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int width,
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int height);
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cairo_public EGLDisplay
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cairo_egl_device_get_display (cairo_device_t *device);
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cairo_public EGLSurface
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cairo_egl_device_get_context (cairo_device_t *device);
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#endif
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CAIRO_END_DECLS
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#else /* CAIRO_HAS_GL_SURFACE */
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# error Cairo was not compiled with support for the GL backend
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#endif /* CAIRO_HAS_GL_SURFACE */
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#endif /* CAIRO_GL_H */
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