lxdream 0.9.1| filename | src/pvr2/scene.h |
| changeset | 736:a02d1475ccfd |
| prev | 687:6bdc2b7032ea |
| next | 847:2089244671d2 |
| author | nkeynes |
| date | Wed Aug 20 11:25:46 2008 +0000 (15 years ago) |
| permissions | -rw-r--r-- |
| last change | Setup the interrupt/exception vectors properly in the arm crt0 Use fully guarded memcpy_to_aica for program transfer |
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1 /**
2 * $Id$
3 *
4 * PVR2 scene description structure (pvr2-private)
5 *
6 * Copyright (c) 2005 Nathan Keynes.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 */
19 #ifndef lxdream_scene_H
20 #define lxdream_scene_H 1
22 #ifdef __cplusplus
23 extern "C" {
24 #endif
26 /************************* Intermediate vertex buffer ************************/
28 typedef enum {
29 SORT_NEVER = 0,
30 SORT_TILEFLAG = 1, /* In this mode, sorting is controlled by the per-segment flag */
31 SORT_ALWAYS = 2
32 } tile_sort_mode_t;
34 struct vertex_struct {
35 float u,v;
36 float x,y,z;
37 float rgba[4];
38 float offset_rgba[4];
39 };
41 struct polygon_struct {
42 uint32_t *context;
43 int cull; // culling mode
44 uint32_t vertex_count; // number of vertexes in polygon
45 uint32_t tex_id;
46 int32_t vertex_index; // index of first vertex in vertex buffer
47 uint32_t mod_tex_id;
48 int32_t mod_vertex_index; // index of first modified vertex in vertex buffer
49 float center_z;
50 struct polygon_struct *next; // chain for tri/quad arrays
51 };
53 void pvr2_scene_init(void);
54 void pvr2_scene_read(void);
55 void pvr2_scene_shutdown();
57 uint32_t pvr2_scene_buffer_width();
58 uint32_t pvr2_scene_buffer_height();
60 extern unsigned char *video_base;
62 /**
63 * Maximum possible size of the vertex buffer. This is figured as follows:
64 * PVR2 polygon buffer is limited to 4MB. The tightest polygon format
65 * is 3 vertexes in 48 bytes = 16 bytes/vertex, (shadow triangle)
66 * (the next tightest is 8 vertex in 140 bytes (6-strip colour-only)).
67 * giving a theoretical maximum of 262144 vertexes.
68 * The expanded structure is 44 bytes/vertex, giving
69 * 11534336 bytes...
70 */
71 #define MAX_VERTEXES 262144
72 #define MAX_VERTEX_BUFFER_SIZE (MAX_VERTEXES*sizeof(struct vertex_struct))
74 /**
75 * Maximum polygons - smallest is 1 polygon in 48 bytes, giving
76 * 87381, plus 1 for the background
77 *
78 */
79 #define MAX_POLYGONS 87382
80 #define MAX_POLY_BUFFER_SIZE (MAX_POLYGONS*sizeof(struct polygon_struct))
81 #define BUF_POLY_MAP_SIZE (4 MB)
83 /*************************************************************************/
85 /* Scene data - this structure holds all the intermediate data used during
86 * the rendering process.
87 *
88 * Special note: if vbo_supported == FALSE, then vertex_array points to a
89 * malloced chunk of system RAM. Otherwise, vertex_array will be either NULL
90 * (if the VBO is unmapped), or a pointer into a chunk of GL managed RAM
91 * (possibly direct-mapped VRAM).
92 */
93 struct pvr2_scene_struct {
94 /** GL ID of the VBO used by the scene (or 0 if VBOs are not in use). */
95 GLuint vbo_id;
96 /** Pointer to the vertex array data, or NULL for unmapped VBOs */
97 struct vertex_struct *vertex_array;
98 /** Current allocated size (in bytes) of the vertex array */
99 uint32_t vertex_array_size;
100 /** Total number of vertexes in the scene (note modified vertexes
101 * count for 2 vertexes */
102 uint32_t vertex_count;
104 /** Pointer to the polygon data for the scene (main ram).
105 * This will always have room for at least MAX_POLYGONS */
106 struct polygon_struct *poly_array;
107 /** Pointer to the background polygon. This is always a quad, and
108 * normally the last member of poly_array */
109 struct polygon_struct *bkgnd_poly;
110 /** Total number of polygons in the scene */
111 uint32_t poly_count;
113 /** Image bounds in 3D - x1,x2,y1,y2,z1,z2
114 * x and y values are determined by the clip planes, while z values are
115 * determined from the vertex data itself.
116 */
117 float bounds[6];
119 /* Total size of the image buffer, determined by the tile map used to
120 * render the scene */
121 uint32_t buffer_width, buffer_height;
123 /** True if modifier volumes use the two-parameter form, False if they
124 * use the cheap-shadow option.
125 */
126 gboolean full_shadow;
127 /** Specifies the translucency auto-sort mode for the scene */
128 tile_sort_mode_t sort_mode;
130 /** Pointer to the start of the tile segment list in PVR2 VRAM (32-bit) */
131 struct tile_segment *segment_list;
132 /** Map from PVR2 polygon address to an element of poly_array. */
133 struct polygon_struct **buf_to_poly_map;
134 /** Pointer to the start of the raw polygon buffer in PVR2 VRAM (32-bit).
135 * Also only used during parsing */
136 uint32_t *pvr2_pbuf;
137 /** Current vertex index during parsing */
138 uint32_t vertex_index;
139 };
141 /**
142 * Current scene structure. Note this should only be written to by vertex bufer
143 * functions
144 */
145 extern struct pvr2_scene_struct pvr2_scene;
147 #ifdef __cplusplus
148 }
149 #endif
151 #endif /* !lxdream_scene_H */
.