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/* cairo - a vector graphics library with display and print output
*
* Copyright © 2009 Eric Anholt
* Copyright © 2009 Chris Wilson
* Copyright © 2005 Red Hat, Inc
*
* This library is free software; you can redistribute it and/or
* modify it either under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation
* (the "LGPL") or, at your option, under the terms of the Mozilla
* Public License Version 1.1 (the "MPL"). If you do not alter this
* notice, a recipient may use your version of this file under either
* the MPL or the LGPL.
*
* You should have received a copy of the LGPL along with this library
* in the file COPYING-LGPL-2.1; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
* You should have received a copy of the MPL along with this library
* in the file COPYING-MPL-1.1
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
* OF ANY KIND, either express or implied. See the LGPL or the MPL for
* the specific language governing rights and limitations.
*
* The Original Code is the cairo graphics library.
*
* The Initial Developer of the Original Code is Red Hat, Inc.
*
* Contributor(s):
* Carl Worth <cworth@cworth.org>
* Chris Wilson <chris@chris-wilson.co.uk>
*/
#ifndef CAIRO_GL_PRIVATE_H
#define CAIRO_GL_PRIVATE_H
#include "cairoint.h"
#include "cairo-rtree-private.h"
#include <GL/glew.h>
#include "cairo-gl.h"
#include <GL/gl.h>
#define GL_GLEXT_PROTOTYPES
#include <GL/glext.h>
#define DEBUG_GL 0
#if DEBUG_GL && __GNUC__
#define UNSUPPORTED(reason) ({ \
fprintf (stderr, \
"cairo-gl: hit unsupported operation in %s(), line %d: %s\n", \
__FUNCTION__, __LINE__, reason); \
CAIRO_INT_STATUS_UNSUPPORTED; \
})
#else
#define UNSUPPORTED(reason) CAIRO_INT_STATUS_UNSUPPORTED
#endif
typedef struct _cairo_gl_surface {
cairo_surface_t base;
cairo_gl_context_t *ctx;
int width, height;
GLuint tex; /* GL texture object containing our data. */
GLuint fb; /* GL framebuffer object wrapping our data. */
} cairo_gl_surface_t;
typedef struct cairo_gl_glyph_cache {
cairo_rtree_t rtree;
GLuint tex;
unsigned int width, height;
} cairo_gl_glyph_cache_t;
struct _cairo_gl_context {
cairo_reference_count_t ref_count;
cairo_status_t status;
cairo_mutex_t mutex; /* needed? */
GLuint dummy_tex;
GLint max_framebuffer_size;
GLint max_texture_size;
cairo_gl_surface_t *current_target;
cairo_gl_glyph_cache_t glyph_cache[2];
void (*make_current)(void *ctx, cairo_gl_surface_t *surface);
void (*swap_buffers)(void *ctx, cairo_gl_surface_t *surface);
void (*destroy) (void *ctx);
};
enum cairo_gl_composite_operand_type {
OPERAND_CONSTANT,
OPERAND_TEXTURE,
};
/* This union structure describes a potential source or mask operand to the
* compositing equation.
*/
typedef struct cairo_gl_composite_operand {
enum cairo_gl_composite_operand_type type;
union {
struct {
GLuint tex;
cairo_gl_surface_t *surface;
cairo_surface_attributes_t attributes;
cairo_bool_t has_alpha;
} texture;
struct {
GLfloat color[4];
} constant;
} operand;
const cairo_pattern_t *pattern;
} cairo_gl_composite_operand_t;
typedef struct _cairo_gl_composite_setup {
cairo_gl_composite_operand_t src;
cairo_gl_composite_operand_t mask;
} cairo_gl_composite_setup_t;
cairo_private extern const cairo_surface_backend_t _cairo_gl_surface_backend;
cairo_private cairo_gl_context_t *
_cairo_gl_context_create_in_error (cairo_status_t status);
cairo_private cairo_status_t
_cairo_gl_context_init (cairo_gl_context_t *ctx);
cairo_private void
_cairo_gl_surface_init (cairo_gl_context_t *ctx,
cairo_gl_surface_t *surface,
cairo_content_t content,
int width, int height);
cairo_private cairo_status_t
_cairo_gl_surface_draw_image (cairo_gl_surface_t *dst,
cairo_image_surface_t *src,
int src_x, int src_y,
int width, int height,
int dst_x, int dst_y);
cairo_private cairo_int_status_t
_cairo_gl_operand_init (cairo_gl_composite_operand_t *operand,
const cairo_pattern_t *pattern,
cairo_gl_surface_t *dst,
int src_x, int src_y,
int dst_x, int dst_y,
int width, int height);
cairo_private cairo_gl_context_t *
_cairo_gl_context_acquire (cairo_gl_context_t *ctx);
cairo_private void
_cairo_gl_context_release (cairo_gl_context_t *ctx);
cairo_private void
_cairo_gl_set_destination (cairo_gl_surface_t *surface);
cairo_private cairo_bool_t
_cairo_gl_operator_is_supported (cairo_operator_t op);
cairo_private void
_cairo_gl_set_operator (cairo_gl_surface_t *dst, cairo_operator_t op);
cairo_private void
_cairo_gl_set_src_operand (cairo_gl_context_t *ctx,
cairo_gl_composite_setup_t *setup);
cairo_private void
_cairo_gl_operand_destroy (cairo_gl_composite_operand_t *operand);
cairo_private cairo_bool_t
_cairo_gl_get_image_format_and_type (pixman_format_code_t pixman_format,
GLenum *internal_format, GLenum *format,
GLenum *type, cairo_bool_t *has_alpha);
cairo_private void
_cairo_gl_surface_scaled_glyph_fini (cairo_scaled_glyph_t *scaled_glyph,
cairo_scaled_font_t *scaled_font);
cairo_private void
_cairo_gl_glyph_cache_init (cairo_gl_glyph_cache_t *cache);
cairo_private cairo_int_status_t
_cairo_gl_surface_show_glyphs (void *abstract_dst,
cairo_operator_t op,
const cairo_pattern_t *source,
cairo_glyph_t *glyphs,
int num_glyphs,
cairo_scaled_font_t *scaled_font,
cairo_clip_t *clip,
int *remaining_glyphs);
cairo_private void
_cairo_gl_glyph_cache_fini (cairo_gl_glyph_cache_t *cache);
static inline int
_cairo_gl_y_flip (cairo_gl_surface_t *surface, int y)
{
if (surface->fb)
return y;
else
return (surface->height - 1) - y;
}
slim_hidden_proto (cairo_gl_surface_create);
#endif /* CAIRO_GL_PRIVATE_H */
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