source/libs/cairo/cairo-src/src/cairo-cogl-private.h

   1 /* cairo - a vector graphics library with display and print output
   2  *
   3  * Copyright © 2011 Intel Corporation.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it either under the terms of the GNU Lesser General Public
   7  * License version 2.1 as published by the Free Software Foundation
   8  * (the "LGPL") or, at your option, under the terms of the Mozilla
   9  * Public License Version 1.1 (the "MPL"). If you do not alter this
  10  * notice, a recipient may use your version of this file under either
  11  * the MPL or the LGPL.
  12  *
  13  * You should have received a copy of the LGPL along with this library
  14  * in the file COPYING-LGPL-2.1; if not, write to the Free Software
  15  * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
  16  * You should have received a copy of the MPL along with this library
  17  * in the file COPYING-MPL-1.1
  18  *
  19  * The contents of this file are subject to the Mozilla Public License
  20  * Version 1.1 (the "License"); you may not use this file except in
  21  * compliance with the License. You may obtain a copy of the License at
  22  * http://www.mozilla.og/MPL/
  23  *
  24  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
  25  * OF ANY KIND, either express or implied. See the LGPL or the MPL for
  26  * the specific language governing rights and limitations.
  27  *
  28  * Contributor(s):
  29  *      Robert Bragg <robert@linux.intel.com>
  30  */
  31
  32 #ifndef CAIRO_COGL_PRIVATE_H
  33 #define CAIRO_COGL_PRIVATE_H
  34
  35 #include "cairo-device-private.h"
  36 #include "cairo-cache-private.h"
  37 #include "cairo-backend-private.h"
  38 #include "cairo-default-context-private.h"
  39 #include "cairo-surface-private.h"
  40
  41 #include <cogl/cogl2-experimental.h>
  42
  43 typedef enum _cairo_cogl_template_type {
  44     CAIRO_COGL_TEMPLATE_TYPE_SOLID,
  45     CAIRO_COGL_TEMPLATE_TYPE_TEXTURE,
  46     CAIRO_COGL_TEMPLATE_TYPE_MASK_SOLID,
  47     CAIRO_COGL_TEMPLATE_TYPE_MASK_TEXTURE,
  48     CAIRO_COGL_TEMPLATE_TYPE_COUNT
  49 } cairo_cogl_template_type;
  50
  51 typedef struct _cairo_cogl_device {
  52     cairo_device_t base;
  53
  54     cairo_bool_t backend_vtable_initialized;
  55     cairo_backend_t backend;
  56
  57     /* We save a copy of all the original backend methods that we override so
  58      * we can chain up...
  59      */
  60     cairo_backend_t backend_parent;
  61
  62     CoglContext *cogl_context;
  63
  64     CoglTexture *dummy_texture;
  65
  66     /* This is a sparsely filled set of templates because we don't support
  67      * the full range of operators that cairo has. All entries corresponding
  68      * to unsupported operators are NULL.
  69      *
  70      * The CAIRO_OPERATOR_ADD is the operator enum with the highest value that
  71      * we support so we at least cap the size of the array by that.
  72      *
  73      * For each operator we have a template for when we have a solid source
  74      * and another for each texture format that could be used as a source.
  75      */
  76     CoglPipeline *template_pipelines[CAIRO_OPERATOR_ADD + 1][CAIRO_COGL_TEMPLATE_TYPE_COUNT];
  77
  78     CoglMatrix identity;
  79
  80     /* Caches 1d linear gradient textures */
  81     cairo_cache_t linear_cache;
  82
  83     cairo_cache_t path_fill_staging_cache;
  84     cairo_cache_t path_fill_prim_cache;
  85     cairo_cache_t path_stroke_staging_cache;
  86     cairo_cache_t path_stroke_prim_cache;
  87 } cairo_cogl_device_t;
  88
  89 typedef struct _cairo_cogl_clip_primitives {
  90     cairo_t *clip;
  91     CoglPrimitive **primitives;
  92 } cairo_cogl_clip_primitives_t;
  93
  94 typedef struct _cairo_cogl_surface {
  95     cairo_surface_t base;
  96
  97     CoglPixelFormat cogl_format;
  98     cairo_bool_t ignore_alpha;
  99
 100     /* We currently have 3 basic kinds of Cogl surfaces:
 101      * 1) A light surface simply wrapping a CoglTexture
 102      * 2) A CoglOffscreen framebuffer that implicitly also wraps a CoglTexture
 103      * 3) A CoglOnscreen framebuffer which could potentially be mapped to
 104      *    a CoglTexture (e.g. via tfp on X11) but we don't currently do
 105      *    that.
 106      */
 107
 108     CoglTexture *texture;
 109     CoglFramebuffer *framebuffer;
 110
 111     int width;
 112     int height;
 113
 114     GQueue *journal;
 115
 116     CoglAttributeBuffer *buffer_stack;
 117     size_t buffer_stack_size;
 118     size_t buffer_stack_offset;
 119     guint8 *buffer_stack_pointer;
 120
 121     cairo_clip_t *last_clip;
 122
 123     /* A small fifo of recently used cairo_clip_ts paired with CoglPrimitives
 124      * that can be used to mask the stencil buffer. */
 125     GList *clips_fifo;
 126
 127     int n_clip_updates_per_frame;
 128
 129     /* Since the surface backend drawing operator functions don't get
 130      * passed the current cairo_t context we don't have a good way
 131      * to get our user-coordinates path into our surface_fill function.
 132      *
 133      * For now we use our _cairo_cogl_context_fill() wrapper to set this
 134      * side band data on the surface...
 135      */
 136     cairo_path_fixed_t *user_path;
 137     cairo_matrix_t *ctm;
 138     cairo_matrix_t *ctm_inverse;
 139     cairo_bool_t path_is_rectangle;
 140     double path_rectangle_x;
 141     double path_rectangle_y;
 142     double path_rectangle_width;
 143     double path_rectangle_height;
 144 } cairo_cogl_surface_t;
 145
 146 cairo_status_t
 147 _cairo_cogl_path_fixed_rectangle (cairo_path_fixed_t *path,
 148                                   cairo_fixed_t x,
 149                                   cairo_fixed_t y,
 150                                   cairo_fixed_t width,
 151                                   cairo_fixed_t height);
 152
 153 cairo_int_status_t
 154 _cairo_cogl_surface_fill_rectangle (void                     *abstract_surface,
 155                                     cairo_operator_t          op,
 156                                     const cairo_pattern_t    *source,
 157                                     double                    x,
 158                                     double                    y,
 159                                     double                    width,
 160                                     double                    height,
 161                                     cairo_matrix_t           *ctm,
 162                                     const cairo_clip_t       *clip);
 163
 164 #endif /* CAIRO_COGL_PRIVATE_H */