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Diffstat (limited to 'src/cairo-gl-private.h')
| -rw-r--r-- | src/cairo-gl-private.h | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/src/cairo-gl-private.h b/src/cairo-gl-private.h new file mode 100644 index 0000000..79145cf --- /dev/null +++ b/src/cairo-gl-private.h @@ -0,0 +1,216 @@ +/* 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 */ |