1 /**************************************************************************
2 *
3 * Copyright 2006 VMware, Inc.
4 * 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
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28 #ifndef INTEL_FBO_H
29 #define INTEL_FBO_H
30
31 #include <stdbool.h>
32 #include <assert.h>
33 #include "main/formats.h"
34 #include "main/macros.h"
35 #include "intel_context.h"
36 #include "intel_mipmap_tree.h"
37 #include "intel_screen.h"
38
39 #ifdef __cplusplus
40 extern "C" {
41 #endif
42
43 struct intel_context;
44 struct intel_mipmap_tree;
45 struct intel_texture_image;
46
47 /**
48 * Intel renderbuffer, derived from gl_renderbuffer.
49 */
50 struct intel_renderbuffer
51 {
52 struct swrast_renderbuffer Base;
53 struct intel_mipmap_tree *mt; /**< The renderbuffer storage. */
54
55 /**
56 * \name Miptree view
57 * \{
58 *
59 * Multiple renderbuffers may simultaneously wrap a single texture and each
60 * provide a different view into that texture. The fields below indicate
61 * which miptree slice is wrapped by this renderbuffer. The fields' values
62 * are consistent with the 'level' and 'layer' parameters of
63 * glFramebufferTextureLayer().
64 *
65 * For renderbuffers not created with glFramebufferTexture*(), mt_level and
66 * mt_layer are 0.
67 */
68 unsigned int mt_level;
69 unsigned int mt_layer;
70 /** \} */
71
72 GLuint draw_x, draw_y; /**< Offset of drawing within the region */
73 };
74
75
76 /**
77 * gl_renderbuffer is a base class which we subclass. The Class field
78 * is used for simple run-time type checking.
79 */
80 #define INTEL_RB_CLASS 0x12345678
81
82
83 /**
84 * Return a gl_renderbuffer ptr casted to intel_renderbuffer.
85 * NULL will be returned if the rb isn't really an intel_renderbuffer.
86 * This is determined by checking the ClassID.
87 */
88 static inline struct intel_renderbuffer *
intel_renderbuffer(struct gl_renderbuffer * rb)89 intel_renderbuffer(struct gl_renderbuffer *rb)
90 {
91 struct intel_renderbuffer *irb = (struct intel_renderbuffer *) rb;
92 if (irb && irb->Base.Base.ClassID == INTEL_RB_CLASS)
93 return irb;
94 else
95 return NULL;
96 }
97
98
99 /**
100 * \brief Return the framebuffer attachment specified by attIndex.
101 *
102 * If the framebuffer lacks the specified attachment, then return null.
103 *
104 * If the attached renderbuffer is a wrapper, then return wrapped
105 * renderbuffer.
106 */
107 static inline struct intel_renderbuffer *
intel_get_renderbuffer(struct gl_framebuffer * fb,gl_buffer_index attIndex)108 intel_get_renderbuffer(struct gl_framebuffer *fb, gl_buffer_index attIndex)
109 {
110 struct gl_renderbuffer *rb;
111
112 assert((unsigned)attIndex < ARRAY_SIZE(fb->Attachment));
113
114 rb = fb->Attachment[attIndex].Renderbuffer;
115 if (!rb)
116 return NULL;
117
118 return intel_renderbuffer(rb);
119 }
120
121
122 static inline mesa_format
intel_rb_format(const struct intel_renderbuffer * rb)123 intel_rb_format(const struct intel_renderbuffer *rb)
124 {
125 return rb->Base.Base.Format;
126 }
127
128 extern struct intel_renderbuffer *
129 intel_create_renderbuffer(mesa_format format);
130
131 struct intel_renderbuffer *
132 intel_create_private_renderbuffer(mesa_format format);
133
134 struct gl_renderbuffer*
135 intel_create_wrapped_renderbuffer(struct gl_context * ctx,
136 int width, int height,
137 mesa_format format);
138
139 extern void
140 intel_fbo_init(struct intel_context *intel);
141
142
143 extern void
144 intel_flip_renderbuffers(struct gl_framebuffer *fb);
145
146 void
147 intel_renderbuffer_set_draw_offset(struct intel_renderbuffer *irb);
148
149 static inline uint32_t
intel_renderbuffer_get_tile_offsets(struct intel_renderbuffer * irb,uint32_t * tile_x,uint32_t * tile_y)150 intel_renderbuffer_get_tile_offsets(struct intel_renderbuffer *irb,
151 uint32_t *tile_x,
152 uint32_t *tile_y)
153 {
154 return intel_miptree_get_tile_offsets(irb->mt, irb->mt_level, irb->mt_layer,
155 tile_x, tile_y);
156 }
157
158 struct intel_region*
159 intel_get_rb_region(struct gl_framebuffer *fb, GLuint attIndex);
160
161 #ifdef __cplusplus
162 }
163 #endif
164
165 #endif /* INTEL_FBO_H */
166