1/*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25
26#ifndef FRAMEBUFFER_H
27#define FRAMEBUFFER_H
28
29#include "mtypes.h"
30
31struct gl_config;
32struct gl_context;
33struct gl_renderbuffer;
34
35extern struct gl_framebuffer *
36_mesa_new_framebuffer(struct gl_context *ctx, GLuint name);
37
38extern void
39_mesa_initialize_window_framebuffer(struct gl_framebuffer *fb,
40				     const struct gl_config *visual);
41
42extern void
43_mesa_initialize_user_framebuffer(struct gl_framebuffer *fb, GLuint name);
44
45extern void
46_mesa_destroy_framebuffer(struct gl_framebuffer *buffer);
47
48extern void
49_mesa_free_framebuffer_data(struct gl_framebuffer *buffer);
50
51extern void
52_mesa_reference_framebuffer_(struct gl_framebuffer **ptr,
53                             struct gl_framebuffer *fb);
54
55static inline void
56_mesa_reference_framebuffer(struct gl_framebuffer **ptr,
57                            struct gl_framebuffer *fb)
58{
59   if (*ptr != fb)
60      _mesa_reference_framebuffer_(ptr, fb);
61}
62
63extern void
64_mesa_resize_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb,
65                         GLuint width, GLuint height);
66
67
68extern void
69_mesa_resizebuffers( struct gl_context *ctx );
70
71extern void
72_mesa_intersect_scissor_bounding_box(const struct gl_context *ctx,
73                                     unsigned idx, int *bbox);
74
75static inline GLuint
76_mesa_geometric_width(const struct gl_framebuffer *buffer)
77{
78   return buffer->_HasAttachments ?
79      buffer->Width : buffer->DefaultGeometry.Width;
80}
81
82static inline GLuint
83_mesa_geometric_height(const struct gl_framebuffer *buffer)
84{
85   return buffer->_HasAttachments ?
86      buffer->Height : buffer->DefaultGeometry.Height;
87}
88
89static inline GLuint
90_mesa_geometric_samples(const struct gl_framebuffer *buffer)
91{
92   return buffer->_HasAttachments ?
93      buffer->Visual.samples :
94      buffer->DefaultGeometry._NumSamples;
95}
96
97static inline GLuint
98_mesa_geometric_layers(const struct gl_framebuffer *buffer)
99{
100   return buffer->_HasAttachments ?
101      buffer->MaxNumLayers : buffer->DefaultGeometry.Layers;
102}
103
104extern void
105_mesa_update_draw_buffer_bounds(struct gl_context *ctx,
106                                struct gl_framebuffer *drawFb);
107
108extern void
109_mesa_update_framebuffer_visual(struct gl_context *ctx,
110				struct gl_framebuffer *fb);
111
112extern void
113_mesa_update_framebuffer(struct gl_context *ctx,
114                         struct gl_framebuffer *readFb,
115                         struct gl_framebuffer *drawFb);
116
117extern GLboolean
118_mesa_source_buffer_exists(struct gl_context *ctx, GLenum format);
119
120extern GLboolean
121_mesa_dest_buffer_exists(struct gl_context *ctx, GLenum format);
122
123extern GLenum
124_mesa_get_color_read_type(struct gl_context *ctx,
125                          struct gl_framebuffer *fb,
126                          const char *caller);
127
128extern GLenum
129_mesa_get_color_read_format(struct gl_context *ctx,
130                            struct gl_framebuffer *fb,
131                            const char *caller);
132
133extern struct gl_renderbuffer *
134_mesa_get_read_renderbuffer_for_format(const struct gl_context *ctx,
135                                       GLenum format);
136
137extern void
138_mesa_print_framebuffer(const struct gl_framebuffer *fb);
139
140extern bool
141_mesa_is_front_buffer_reading(const struct gl_framebuffer *fb);
142
143extern bool
144_mesa_is_front_buffer_drawing(const struct gl_framebuffer *fb);
145
146extern bool
147_mesa_is_multisample_enabled(const struct gl_context *ctx);
148
149extern bool
150_mesa_is_alpha_test_enabled(const struct gl_context *ctx);
151
152extern bool
153_mesa_is_alpha_to_coverage_enabled(const struct gl_context *ctx);
154
155#endif /* FRAMEBUFFER_H */
156