filename | src/pvr2/scene.c |
changeset | 635:76c63aac3590 |
next | 636:2ccf94f966fc |
author | nkeynes |
date | Thu Feb 14 13:54:11 2008 +0000 (14 years ago) |
branch | lxdream-render |
permissions | -rw-r--r-- |
last change | Commit render work in progress. Main changes: * Preliminary OSMesa support * Move the generic gl code out to pvr2/ * Implement scene data structure + reader * Remove the 1/z adjustments |
file | annotate | diff | log | raw |
nkeynes@635 | 1 | /** |
nkeynes@635 | 2 | * $Id: gl_common.c 602 2008-01-15 20:50:23Z nkeynes $ |
nkeynes@635 | 3 | * |
nkeynes@635 | 4 | * Manage the internal vertex/polygon buffers and scene data structure. |
nkeynes@635 | 5 | * Where possible this uses VBOs for the vertex + index data. |
nkeynes@635 | 6 | * |
nkeynes@635 | 7 | * Copyright (c) 2005 Nathan Keynes. |
nkeynes@635 | 8 | * |
nkeynes@635 | 9 | * This program is free software; you can redistribute it and/or modify |
nkeynes@635 | 10 | * it under the terms of the GNU General Public License as published by |
nkeynes@635 | 11 | * the Free Software Foundation; either version 2 of the License, or |
nkeynes@635 | 12 | * (at your option) any later version. |
nkeynes@635 | 13 | * |
nkeynes@635 | 14 | * This program is distributed in the hope that it will be useful, |
nkeynes@635 | 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
nkeynes@635 | 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
nkeynes@635 | 17 | * GNU General Public License for more details. |
nkeynes@635 | 18 | */ |
nkeynes@635 | 19 | |
nkeynes@635 | 20 | #include <assert.h> |
nkeynes@635 | 21 | #include <string.h> |
nkeynes@635 | 22 | #include "lxdream.h" |
nkeynes@635 | 23 | #include "display.h" |
nkeynes@635 | 24 | #include "pvr2/pvr2.h" |
nkeynes@635 | 25 | #include "pvr2/glutil.h" |
nkeynes@635 | 26 | #include "pvr2/scene.h" |
nkeynes@635 | 27 | |
nkeynes@635 | 28 | #define VBO_EXT_STRING "GL_ARB_vertex_buffer_object" |
nkeynes@635 | 29 | #define PBO_EXT_STRING "GL_ARB_pixel_buffer_object" |
nkeynes@635 | 30 | |
nkeynes@635 | 31 | struct pvr2_scene_struct pvr2_scene; |
nkeynes@635 | 32 | |
nkeynes@635 | 33 | static gboolean vbo_init = FALSE; |
nkeynes@635 | 34 | static gboolean vbo_supported = FALSE; |
nkeynes@635 | 35 | |
nkeynes@635 | 36 | /** |
nkeynes@635 | 37 | * Test for VBO support, and allocate all the system memory needed for the |
nkeynes@635 | 38 | * temporary structures. GL context must have been initialized before this |
nkeynes@635 | 39 | * point. |
nkeynes@635 | 40 | */ |
nkeynes@635 | 41 | void pvr2_scene_init() |
nkeynes@635 | 42 | { |
nkeynes@635 | 43 | if( !vbo_init ) { |
nkeynes@635 | 44 | if( isGLExtensionSupported(VBO_EXT_STRING) ) { |
nkeynes@635 | 45 | vbo_supported = TRUE; |
nkeynes@635 | 46 | pvr2_scene.vbo_id = 1; |
nkeynes@635 | 47 | } |
nkeynes@635 | 48 | pvr2_scene.vertex_array = NULL; |
nkeynes@635 | 49 | pvr2_scene.vertex_array_size = 0; |
nkeynes@635 | 50 | pvr2_scene.poly_array = g_malloc( MAX_POLY_BUFFER_SIZE ); |
nkeynes@635 | 51 | pvr2_scene.buf_to_poly_map = g_malloc0( BUF_POLY_MAP_SIZE ); |
nkeynes@635 | 52 | vbo_init = TRUE; |
nkeynes@635 | 53 | } |
nkeynes@635 | 54 | } |
nkeynes@635 | 55 | |
nkeynes@635 | 56 | void pvr2_scene_shutdown() |
nkeynes@635 | 57 | { |
nkeynes@635 | 58 | if( vbo_supported ) { |
nkeynes@635 | 59 | glBindBufferARB( GL_ARRAY_BUFFER_ARB, 0 ); |
nkeynes@635 | 60 | glDeleteBuffersARB( 1, &pvr2_scene.vbo_id ); |
nkeynes@635 | 61 | pvr2_scene.vbo_id = 0; |
nkeynes@635 | 62 | } else { |
nkeynes@635 | 63 | g_free( pvr2_scene.vertex_array ); |
nkeynes@635 | 64 | pvr2_scene.vertex_array = NULL; |
nkeynes@635 | 65 | } |
nkeynes@635 | 66 | g_free( pvr2_scene.poly_array ); |
nkeynes@635 | 67 | g_free( pvr2_scene.buf_to_poly_map ); |
nkeynes@635 | 68 | vbo_init = FALSE; |
nkeynes@635 | 69 | } |
nkeynes@635 | 70 | |
nkeynes@635 | 71 | void *vertex_buffer_map() |
nkeynes@635 | 72 | { |
nkeynes@635 | 73 | uint32_t size = pvr2_scene.vertex_count * sizeof(struct vertex_struct); |
nkeynes@635 | 74 | if( vbo_supported ) { |
nkeynes@635 | 75 | glBindBufferARB( GL_ARRAY_BUFFER_ARB, pvr2_scene.vbo_id ); |
nkeynes@635 | 76 | |
nkeynes@635 | 77 | if( size > pvr2_scene.vertex_array_size ) { |
nkeynes@635 | 78 | glBufferDataARB( GL_ARRAY_BUFFER_ARB, size, NULL, GL_DYNAMIC_DRAW_ARB ); |
nkeynes@635 | 79 | assert( glGetError() == 0 ); |
nkeynes@635 | 80 | } |
nkeynes@635 | 81 | pvr2_scene.vertex_array = glMapBufferARB( GL_ARRAY_BUFFER_ARB, GL_WRITE_ONLY_ARB ); |
nkeynes@635 | 82 | assert(pvr2_scene.vertex_array != NULL ); |
nkeynes@635 | 83 | } else { |
nkeynes@635 | 84 | if( size > pvr2_scene.vertex_array_size ) { |
nkeynes@635 | 85 | pvr2_scene.vertex_array = g_realloc( pvr2_scene.vertex_array, size ); |
nkeynes@635 | 86 | } |
nkeynes@635 | 87 | } |
nkeynes@635 | 88 | return pvr2_scene.vertex_array; |
nkeynes@635 | 89 | } |
nkeynes@635 | 90 | |
nkeynes@635 | 91 | gboolean vertex_buffer_unmap() |
nkeynes@635 | 92 | { |
nkeynes@635 | 93 | if( vbo_supported ) { |
nkeynes@635 | 94 | pvr2_scene.vertex_array = NULL; |
nkeynes@635 | 95 | return glUnmapBufferARB( GL_ARRAY_BUFFER_ARB ); |
nkeynes@635 | 96 | } else { |
nkeynes@635 | 97 | return TRUE; |
nkeynes@635 | 98 | } |
nkeynes@635 | 99 | } |
nkeynes@635 | 100 | |
nkeynes@635 | 101 | static struct polygon_struct *vertex_buffer_add_polygon( pvraddr_t poly_idx, int vertex_count, |
nkeynes@635 | 102 | gboolean is_modified ) |
nkeynes@635 | 103 | { |
nkeynes@635 | 104 | int vert_mul = is_modified ? 2 : 1; |
nkeynes@635 | 105 | |
nkeynes@635 | 106 | if( pvr2_scene.buf_to_poly_map[poly_idx] != NULL ) { |
nkeynes@635 | 107 | if( vertex_count > pvr2_scene.buf_to_poly_map[poly_idx]->vertex_count ) { |
nkeynes@635 | 108 | pvr2_scene.vertex_count += (vertex_count - pvr2_scene.buf_to_poly_map[poly_idx]->vertex_count) * vert_mul; |
nkeynes@635 | 109 | pvr2_scene.buf_to_poly_map[poly_idx]->vertex_count = vertex_count; |
nkeynes@635 | 110 | } |
nkeynes@635 | 111 | return pvr2_scene.buf_to_poly_map[poly_idx]; |
nkeynes@635 | 112 | } else { |
nkeynes@635 | 113 | struct polygon_struct *poly = &pvr2_scene.poly_array[pvr2_scene.poly_count++]; |
nkeynes@635 | 114 | poly->context = (uint32_t *)(video_base + MMIO_READ(PVR2,RENDER_POLYBASE) + (poly_idx<<2)); |
nkeynes@635 | 115 | poly->vertex_count = vertex_count; |
nkeynes@635 | 116 | poly->vertex_index = -1; |
nkeynes@635 | 117 | pvr2_scene.buf_to_poly_map[poly_idx] = poly; |
nkeynes@635 | 118 | pvr2_scene.vertex_count += (vertex_count * vert_mul); |
nkeynes@635 | 119 | return poly; |
nkeynes@635 | 120 | } |
nkeynes@635 | 121 | } |
nkeynes@635 | 122 | |
nkeynes@635 | 123 | /** |
nkeynes@635 | 124 | * Decode a single PVR2 renderable vertex (opaque/trans/punch-out, but not shadow |
nkeynes@635 | 125 | * volume) |
nkeynes@635 | 126 | * @param vert Pointer to output vertex structure |
nkeynes@635 | 127 | * @param poly1 First word of polygon context (needed to understand vertex) |
nkeynes@635 | 128 | * @param pvr2_data Pointer to raw pvr2 vertex data (in VRAM) |
nkeynes@635 | 129 | * @param modify_offset Offset in 32-bit words to the tex/color data. 0 for |
nkeynes@635 | 130 | * the normal vertex, half the vertex length for the modified vertex. |
nkeynes@635 | 131 | */ |
nkeynes@635 | 132 | static void pvr2_decode_render_vertex( struct vertex_struct *vert, uint32_t poly1, |
nkeynes@635 | 133 | uint32_t *pvr2_data, int modify_offset ) |
nkeynes@635 | 134 | { |
nkeynes@635 | 135 | union pvr2_data_type { |
nkeynes@635 | 136 | uint32_t *ival; |
nkeynes@635 | 137 | float *fval; |
nkeynes@635 | 138 | } data; |
nkeynes@635 | 139 | |
nkeynes@635 | 140 | data.ival = pvr2_data; |
nkeynes@635 | 141 | |
nkeynes@635 | 142 | vert->x = *data.fval++; |
nkeynes@635 | 143 | vert->y = *data.fval++; |
nkeynes@635 | 144 | |
nkeynes@635 | 145 | float z = *data.fval++; |
nkeynes@635 | 146 | if( z > pvr2_scene.bounds[5] ) { |
nkeynes@635 | 147 | pvr2_scene.bounds[5] = z; |
nkeynes@635 | 148 | } else if( z < pvr2_scene.bounds[4] && z != 0 ) { |
nkeynes@635 | 149 | pvr2_scene.bounds[4] = z; |
nkeynes@635 | 150 | } |
nkeynes@635 | 151 | vert->z = z; |
nkeynes@635 | 152 | data.ival += modify_offset; |
nkeynes@635 | 153 | |
nkeynes@635 | 154 | |
nkeynes@635 | 155 | if( POLY1_TEXTURED(poly1) ) { |
nkeynes@635 | 156 | if( POLY1_UV16(poly1) ) { |
nkeynes@635 | 157 | vert->u = halftofloat( *data.ival>>16 ); |
nkeynes@635 | 158 | vert->v = halftofloat( *data.ival ); |
nkeynes@635 | 159 | data.ival++; |
nkeynes@635 | 160 | } else { |
nkeynes@635 | 161 | vert->u = *data.fval++; |
nkeynes@635 | 162 | vert->v = *data.fval++; |
nkeynes@635 | 163 | } |
nkeynes@635 | 164 | } |
nkeynes@635 | 165 | vert->rgba = *data.ival++; |
nkeynes@635 | 166 | if( POLY1_SPECULAR(poly1) ) { |
nkeynes@635 | 167 | vert->offset_rgba = *data.ival++; |
nkeynes@635 | 168 | } |
nkeynes@635 | 169 | } |
nkeynes@635 | 170 | |
nkeynes@635 | 171 | /** |
nkeynes@635 | 172 | * Compute texture, colour, and z values for a result point by interpolating from |
nkeynes@635 | 173 | * a set of 3 input points. The result point must define its x,y. |
nkeynes@635 | 174 | */ |
nkeynes@635 | 175 | static void vertex_buffer_compute_vertex( struct vertex_struct *result, |
nkeynes@635 | 176 | struct vertex_struct *input, |
nkeynes@635 | 177 | gboolean is_solid_shaded ) |
nkeynes@635 | 178 | { |
nkeynes@635 | 179 | int i; |
nkeynes@635 | 180 | float sx = input[2].x - input[1].x; |
nkeynes@635 | 181 | float sy = input[2].y - input[1].y; |
nkeynes@635 | 182 | float tx = input[0].x - input[1].x; |
nkeynes@635 | 183 | float ty = input[0].y - input[1].y; |
nkeynes@635 | 184 | |
nkeynes@635 | 185 | float detxy = ((sy) * (tx)) - ((ty) * (sx)); |
nkeynes@635 | 186 | if( detxy == 0 ) { |
nkeynes@635 | 187 | result->z = input[2].z; |
nkeynes@635 | 188 | result->u = input[2].u; |
nkeynes@635 | 189 | result->v = input[2].v; |
nkeynes@635 | 190 | result->rgba = input[2].rgba; |
nkeynes@635 | 191 | result->offset_rgba = input[2].offset_rgba; |
nkeynes@635 | 192 | return; |
nkeynes@635 | 193 | } |
nkeynes@635 | 194 | float t = ((result->x - input[1].x) * sy - |
nkeynes@635 | 195 | (result->y - input[1].y) * sx) / detxy; |
nkeynes@635 | 196 | float s = ((result->y - input[1].y) * tx - |
nkeynes@635 | 197 | (result->x - input[1].x) * ty) / detxy; |
nkeynes@635 | 198 | |
nkeynes@635 | 199 | float sz = input[2].z - input[1].z; |
nkeynes@635 | 200 | float tz = input[0].z - input[1].z; |
nkeynes@635 | 201 | float su = input[2].u - input[1].u; |
nkeynes@635 | 202 | float tu = input[0].u - input[1].u; |
nkeynes@635 | 203 | float sv = input[2].v - input[1].v; |
nkeynes@635 | 204 | float tv = input[0].v - input[1].v; |
nkeynes@635 | 205 | |
nkeynes@635 | 206 | float rz = input[1].z + (t*tz) + (s*sz); |
nkeynes@635 | 207 | if( rz > pvr2_scene.bounds[5] ) { |
nkeynes@635 | 208 | pvr2_scene.bounds[5] = rz; |
nkeynes@635 | 209 | } else if( rz < pvr2_scene.bounds[4] ) { |
nkeynes@635 | 210 | pvr2_scene.bounds[4] = rz; |
nkeynes@635 | 211 | } |
nkeynes@635 | 212 | result->z = rz; |
nkeynes@635 | 213 | result->u = input[1].u + (t*tu) + (s*su); |
nkeynes@635 | 214 | result->v = input[1].v + (t*tv) + (s*sv); |
nkeynes@635 | 215 | |
nkeynes@635 | 216 | if( is_solid_shaded ) { |
nkeynes@635 | 217 | result->rgba = input[2].rgba; |
nkeynes@635 | 218 | result->offset_rgba = input[2].offset_rgba; |
nkeynes@635 | 219 | } else { |
nkeynes@635 | 220 | uint8_t *rgba0 = (uint8_t *)&input[0].rgba; |
nkeynes@635 | 221 | uint8_t *rgba1 = (uint8_t *)&input[1].rgba; |
nkeynes@635 | 222 | uint8_t *rgba2 = (uint8_t *)&input[2].rgba; |
nkeynes@635 | 223 | uint8_t *rgba3 = (uint8_t *)&result->rgba; |
nkeynes@635 | 224 | for( i=0; i<8; i++ ) { // note: depends on rgba & offset_rgba being adjacent |
nkeynes@635 | 225 | float tc = *rgba0++ - *rgba1; |
nkeynes@635 | 226 | float sc = *rgba2++ - *rgba1; |
nkeynes@635 | 227 | float rc = *rgba1++ + (t*tc) + (s*sc); |
nkeynes@635 | 228 | if( rc < 0 ) { |
nkeynes@635 | 229 | rc = 0; |
nkeynes@635 | 230 | } else if( rc > 255 ) { |
nkeynes@635 | 231 | rc = 255; |
nkeynes@635 | 232 | } |
nkeynes@635 | 233 | *rgba3++ = rc; |
nkeynes@635 | 234 | } |
nkeynes@635 | 235 | } |
nkeynes@635 | 236 | |
nkeynes@635 | 237 | } |
nkeynes@635 | 238 | |
nkeynes@635 | 239 | static void vertex_buffer_add_vertexes( pvraddr_t poly_idx, int vertex_length, |
nkeynes@635 | 240 | gboolean is_modified ) |
nkeynes@635 | 241 | { |
nkeynes@635 | 242 | struct polygon_struct *poly = pvr2_scene.buf_to_poly_map[poly_idx]; |
nkeynes@635 | 243 | uint32_t *ptr = &pvr2_scene.pvr2_pbuf[poly_idx]; |
nkeynes@635 | 244 | uint32_t *context = ptr; |
nkeynes@635 | 245 | unsigned int i; |
nkeynes@635 | 246 | |
nkeynes@635 | 247 | assert( poly != NULL ); |
nkeynes@635 | 248 | if( poly->vertex_index == -1 ) { |
nkeynes@635 | 249 | ptr += (is_modified ? 5 : 3 ); |
nkeynes@635 | 250 | poly->vertex_index = pvr2_scene.vertex_index; |
nkeynes@635 | 251 | assert( pvr2_scene.vertex_index + poly->vertex_count <= pvr2_scene.vertex_count ); |
nkeynes@635 | 252 | for( i=0; i<poly->vertex_count; i++ ) { |
nkeynes@635 | 253 | pvr2_decode_render_vertex( &pvr2_scene.vertex_array[pvr2_scene.vertex_index++], context[0], ptr, 0 ); |
nkeynes@635 | 254 | ptr += vertex_length; |
nkeynes@635 | 255 | } |
nkeynes@635 | 256 | if( is_modified ) { |
nkeynes@635 | 257 | int mod_offset = (vertex_length - 3)>>1; |
nkeynes@635 | 258 | ptr = &pvr2_scene.pvr2_pbuf[poly_idx] + 5; |
nkeynes@635 | 259 | poly->mod_vertex_index = pvr2_scene.vertex_index; |
nkeynes@635 | 260 | for( i=0; i<poly->vertex_count; i++ ) { |
nkeynes@635 | 261 | pvr2_decode_render_vertex( &pvr2_scene.vertex_array[pvr2_scene.vertex_index++], context[0], ptr, mod_offset ); |
nkeynes@635 | 262 | ptr += vertex_length; |
nkeynes@635 | 263 | } |
nkeynes@635 | 264 | } |
nkeynes@635 | 265 | } |
nkeynes@635 | 266 | } |
nkeynes@635 | 267 | |
nkeynes@635 | 268 | static void vertex_buffer_add_quad_vertexes( pvraddr_t poly_idx, int vertex_length, |
nkeynes@635 | 269 | gboolean is_modified ) |
nkeynes@635 | 270 | { |
nkeynes@635 | 271 | struct polygon_struct *poly = pvr2_scene.buf_to_poly_map[poly_idx]; |
nkeynes@635 | 272 | uint32_t *ptr = &pvr2_scene.pvr2_pbuf[poly_idx]; |
nkeynes@635 | 273 | uint32_t *context = ptr; |
nkeynes@635 | 274 | unsigned int i; |
nkeynes@635 | 275 | |
nkeynes@635 | 276 | if( poly->vertex_index == -1 ) { |
nkeynes@635 | 277 | // Construct it locally and copy to the vertex buffer, as the VBO is |
nkeynes@635 | 278 | // allowed to be horribly slow for reads (ie it could be direct-mapped |
nkeynes@635 | 279 | // vram). |
nkeynes@635 | 280 | struct vertex_struct quad[4]; |
nkeynes@635 | 281 | |
nkeynes@635 | 282 | assert( poly != NULL ); |
nkeynes@635 | 283 | ptr += (is_modified ? 5 : 3 ); |
nkeynes@635 | 284 | poly->vertex_index = pvr2_scene.vertex_index; |
nkeynes@635 | 285 | for( i=0; i<4; i++ ) { |
nkeynes@635 | 286 | pvr2_decode_render_vertex( &quad[i], context[0], ptr, 0 ); |
nkeynes@635 | 287 | ptr += vertex_length; |
nkeynes@635 | 288 | } |
nkeynes@635 | 289 | vertex_buffer_compute_vertex( &quad[3], &quad[0], !POLY1_GOURAUD_SHADED(context[0]) ); |
nkeynes@635 | 290 | memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index], quad, sizeof(quad) ); |
nkeynes@635 | 291 | pvr2_scene.vertex_index += 4; |
nkeynes@635 | 292 | |
nkeynes@635 | 293 | if( is_modified ) { |
nkeynes@635 | 294 | int mod_offset = (vertex_length - 3)>>1; |
nkeynes@635 | 295 | ptr = &pvr2_scene.pvr2_pbuf[poly_idx] + 5; |
nkeynes@635 | 296 | poly->mod_vertex_index = pvr2_scene.vertex_index; |
nkeynes@635 | 297 | for( i=0; i<4; i++ ) { |
nkeynes@635 | 298 | pvr2_decode_render_vertex( &quad[4], context[0], ptr, mod_offset ); |
nkeynes@635 | 299 | ptr += vertex_length; |
nkeynes@635 | 300 | } |
nkeynes@635 | 301 | vertex_buffer_compute_vertex( &quad[3], &quad[0], !POLY1_GOURAUD_SHADED(context[0]) ); |
nkeynes@635 | 302 | memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index], quad, sizeof(quad) ); |
nkeynes@635 | 303 | pvr2_scene.vertex_index += 4; |
nkeynes@635 | 304 | } |
nkeynes@635 | 305 | } |
nkeynes@635 | 306 | } |
nkeynes@635 | 307 | |
nkeynes@635 | 308 | static void vertex_buffer_extract_polygons( pvraddr_t tile_entry ) |
nkeynes@635 | 309 | { |
nkeynes@635 | 310 | uint32_t *tile_list = (uint32_t *)(video_base+tile_entry); |
nkeynes@635 | 311 | do { |
nkeynes@635 | 312 | uint32_t entry = *tile_list++; |
nkeynes@635 | 313 | if( entry >> 28 == 0x0F ) { |
nkeynes@635 | 314 | break; |
nkeynes@635 | 315 | } else if( entry >> 28 == 0x0E ) { |
nkeynes@635 | 316 | tile_list = (uint32_t *)(video_base + (entry&0x007FFFFF)); |
nkeynes@635 | 317 | } else { |
nkeynes@635 | 318 | pvraddr_t polyaddr = entry&0x000FFFFF; |
nkeynes@635 | 319 | int is_modified = (entry & 0x01000000) && pvr2_scene.full_shadow; |
nkeynes@635 | 320 | int vertex_length = (entry >> 21) & 0x07; |
nkeynes@635 | 321 | int context_length = 3; |
nkeynes@635 | 322 | if( is_modified ) { |
nkeynes@635 | 323 | context_length = 5; |
nkeynes@635 | 324 | vertex_length <<= 1 ; |
nkeynes@635 | 325 | } |
nkeynes@635 | 326 | vertex_length += 3; |
nkeynes@635 | 327 | |
nkeynes@635 | 328 | if( (entry & 0xE0000000) == 0x80000000 ) { |
nkeynes@635 | 329 | /* Triangle(s) */ |
nkeynes@635 | 330 | int strip_count = ((entry >> 25) & 0x0F)+1; |
nkeynes@635 | 331 | int polygon_length = 3 * vertex_length + context_length; |
nkeynes@635 | 332 | int i; |
nkeynes@635 | 333 | struct polygon_struct *last_poly = NULL; |
nkeynes@635 | 334 | for( i=0; i<strip_count; i++ ) { |
nkeynes@635 | 335 | struct polygon_struct *poly = vertex_buffer_add_polygon( polyaddr, 3, is_modified ); |
nkeynes@635 | 336 | polyaddr += polygon_length; |
nkeynes@635 | 337 | if( last_poly != NULL && last_poly->next == NULL ) { |
nkeynes@635 | 338 | last_poly->next = poly; |
nkeynes@635 | 339 | } |
nkeynes@635 | 340 | last_poly = poly; |
nkeynes@635 | 341 | } |
nkeynes@635 | 342 | } else if( (entry & 0xE0000000) == 0xA0000000 ) { |
nkeynes@635 | 343 | /* Sprite(s) */ |
nkeynes@635 | 344 | int strip_count = ((entry >> 25) & 0x0F)+1; |
nkeynes@635 | 345 | int polygon_length = 4 * vertex_length + context_length; |
nkeynes@635 | 346 | int i; |
nkeynes@635 | 347 | struct polygon_struct *last_poly = NULL; |
nkeynes@635 | 348 | for( i=0; i<strip_count; i++ ) { |
nkeynes@635 | 349 | struct polygon_struct *poly = vertex_buffer_add_polygon( polyaddr, 4, is_modified ); |
nkeynes@635 | 350 | polyaddr += polygon_length; |
nkeynes@635 | 351 | if( last_poly != NULL && last_poly->next == NULL ) { |
nkeynes@635 | 352 | last_poly->next = poly; |
nkeynes@635 | 353 | } |
nkeynes@635 | 354 | last_poly = poly; |
nkeynes@635 | 355 | } |
nkeynes@635 | 356 | } else { |
nkeynes@635 | 357 | /* Polygon */ |
nkeynes@635 | 358 | int i, last = -1; |
nkeynes@635 | 359 | for( i=5; i>=0; i-- ) { |
nkeynes@635 | 360 | if( entry & (0x40000000>>i) ) { |
nkeynes@635 | 361 | last = i; |
nkeynes@635 | 362 | break; |
nkeynes@635 | 363 | } |
nkeynes@635 | 364 | } |
nkeynes@635 | 365 | if( last != -1 ) { |
nkeynes@635 | 366 | vertex_buffer_add_polygon( polyaddr, last+3, is_modified ); |
nkeynes@635 | 367 | } |
nkeynes@635 | 368 | } |
nkeynes@635 | 369 | } |
nkeynes@635 | 370 | } while( 1 ); |
nkeynes@635 | 371 | } |
nkeynes@635 | 372 | |
nkeynes@635 | 373 | static void vertex_buffer_extract_vertexes( pvraddr_t tile_entry ) |
nkeynes@635 | 374 | { |
nkeynes@635 | 375 | uint32_t *tile_list = (uint32_t *)(video_base+tile_entry); |
nkeynes@635 | 376 | do { |
nkeynes@635 | 377 | uint32_t entry = *tile_list++; |
nkeynes@635 | 378 | if( entry >> 28 == 0x0F ) { |
nkeynes@635 | 379 | break; |
nkeynes@635 | 380 | } else if( entry >> 28 == 0x0E ) { |
nkeynes@635 | 381 | tile_list = (uint32_t *)(video_base + (entry&0x007FFFFF)); |
nkeynes@635 | 382 | } else { |
nkeynes@635 | 383 | pvraddr_t polyaddr = entry&0x000FFFFF; |
nkeynes@635 | 384 | int is_modified = (entry & 0x01000000) && pvr2_scene.full_shadow; |
nkeynes@635 | 385 | int vertex_length = (entry >> 21) & 0x07; |
nkeynes@635 | 386 | int context_length = 3; |
nkeynes@635 | 387 | if( is_modified ) { |
nkeynes@635 | 388 | context_length = 5; |
nkeynes@635 | 389 | vertex_length <<=1 ; |
nkeynes@635 | 390 | } |
nkeynes@635 | 391 | vertex_length += 3; |
nkeynes@635 | 392 | |
nkeynes@635 | 393 | if( (entry & 0xE0000000) == 0x80000000 ) { |
nkeynes@635 | 394 | /* Triangle(s) */ |
nkeynes@635 | 395 | int strip_count = ((entry >> 25) & 0x0F)+1; |
nkeynes@635 | 396 | int polygon_length = 3 * vertex_length + context_length; |
nkeynes@635 | 397 | int i; |
nkeynes@635 | 398 | for( i=0; i<strip_count; i++ ) { |
nkeynes@635 | 399 | vertex_buffer_add_vertexes( polyaddr, vertex_length, is_modified ); |
nkeynes@635 | 400 | polyaddr += polygon_length; |
nkeynes@635 | 401 | } |
nkeynes@635 | 402 | } else if( (entry & 0xE0000000) == 0xA0000000 ) { |
nkeynes@635 | 403 | /* Sprite(s) */ |
nkeynes@635 | 404 | int strip_count = ((entry >> 25) & 0x0F)+1; |
nkeynes@635 | 405 | int polygon_length = 4 * vertex_length + context_length; |
nkeynes@635 | 406 | int i; |
nkeynes@635 | 407 | for( i=0; i<strip_count; i++ ) { |
nkeynes@635 | 408 | vertex_buffer_add_quad_vertexes( polyaddr, vertex_length, is_modified ); |
nkeynes@635 | 409 | polyaddr += polygon_length; |
nkeynes@635 | 410 | } |
nkeynes@635 | 411 | } else { |
nkeynes@635 | 412 | /* Polygon */ |
nkeynes@635 | 413 | int i, last = -1; |
nkeynes@635 | 414 | for( i=5; i>=0; i-- ) { |
nkeynes@635 | 415 | if( entry & (0x40000000>>i) ) { |
nkeynes@635 | 416 | last = i; |
nkeynes@635 | 417 | break; |
nkeynes@635 | 418 | } |
nkeynes@635 | 419 | } |
nkeynes@635 | 420 | if( last != -1 ) { |
nkeynes@635 | 421 | vertex_buffer_add_vertexes( polyaddr, vertex_length, is_modified ); |
nkeynes@635 | 422 | } |
nkeynes@635 | 423 | } |
nkeynes@635 | 424 | } |
nkeynes@635 | 425 | } while( 1 ); |
nkeynes@635 | 426 | } |
nkeynes@635 | 427 | |
nkeynes@635 | 428 | /** |
nkeynes@635 | 429 | * Extract the current scene into the rendering structures. We run two passes |
nkeynes@635 | 430 | * - first pass extracts the polygons into pvr2_scene.poly_array (finding vertex counts), |
nkeynes@635 | 431 | * second pass extracts the vertex data into the VBO/vertex array. |
nkeynes@635 | 432 | * |
nkeynes@635 | 433 | * Difficult to do in single pass as we don't generally know the size of a |
nkeynes@635 | 434 | * polygon for certain until we've seen all tiles containing it. It also means we |
nkeynes@635 | 435 | * can count the vertexes and allocate the appropriate size VBO. |
nkeynes@635 | 436 | * |
nkeynes@635 | 437 | * FIXME: accesses into VRAM need to be bounds-checked properly |
nkeynes@635 | 438 | */ |
nkeynes@635 | 439 | void pvr2_scene_read( void ) |
nkeynes@635 | 440 | { |
nkeynes@635 | 441 | pvr2_scene_init(); |
nkeynes@635 | 442 | |
nkeynes@635 | 443 | pvr2_scene.poly_count = 0; |
nkeynes@635 | 444 | pvr2_scene.vertex_count = 0; |
nkeynes@635 | 445 | pvr2_scene.bounds[0] = MMIO_READ( PVR2, RENDER_HCLIP ) & 0x03FF; |
nkeynes@635 | 446 | pvr2_scene.bounds[1] = ((MMIO_READ( PVR2, RENDER_HCLIP ) >> 16) & 0x03FF) + 1; |
nkeynes@635 | 447 | pvr2_scene.bounds[2] = MMIO_READ( PVR2, RENDER_VCLIP ) & 0x03FF; |
nkeynes@635 | 448 | pvr2_scene.bounds[3] = ((MMIO_READ( PVR2, RENDER_VCLIP ) >> 16) & 0x03FF) + 1; |
nkeynes@635 | 449 | pvr2_scene.bounds[4] = pvr2_scene.bounds[5] = MMIO_READF( PVR2, RENDER_FARCLIP ); |
nkeynes@635 | 450 | |
nkeynes@635 | 451 | uint32_t *tilebuffer = (uint32_t *)(video_base + MMIO_READ( PVR2, RENDER_TILEBASE )); |
nkeynes@635 | 452 | uint32_t *segment = tilebuffer; |
nkeynes@635 | 453 | pvr2_scene.segment_list = (struct tile_segment *)tilebuffer; |
nkeynes@635 | 454 | pvr2_scene.pvr2_pbuf = (uint32_t *)(video_base + MMIO_READ(PVR2,RENDER_POLYBASE)); |
nkeynes@635 | 455 | pvr2_scene.full_shadow = MMIO_READ( PVR2, RENDER_SHADOW ) & 0x100 ? FALSE : TRUE; |
nkeynes@635 | 456 | |
nkeynes@635 | 457 | int max_tile_x = 0; |
nkeynes@635 | 458 | int max_tile_y = 0; |
nkeynes@635 | 459 | int obj_config = MMIO_READ( PVR2, RENDER_OBJCFG ); |
nkeynes@635 | 460 | int isp_config = MMIO_READ( PVR2, RENDER_ISPCFG ); |
nkeynes@635 | 461 | |
nkeynes@635 | 462 | if( (obj_config & 0x00200000) == 0 ) { |
nkeynes@635 | 463 | if( isp_config & 1 ) { |
nkeynes@635 | 464 | pvr2_scene.sort_mode = SORT_NEVER; |
nkeynes@635 | 465 | } else { |
nkeynes@635 | 466 | pvr2_scene.sort_mode = SORT_ALWAYS; |
nkeynes@635 | 467 | } |
nkeynes@635 | 468 | } else { |
nkeynes@635 | 469 | pvr2_scene.sort_mode = SORT_BYFLAG; |
nkeynes@635 | 470 | } |
nkeynes@635 | 471 | |
nkeynes@635 | 472 | // Pass 1: Extract polygon list |
nkeynes@635 | 473 | uint32_t control; |
nkeynes@635 | 474 | int i; |
nkeynes@635 | 475 | do { |
nkeynes@635 | 476 | control = *segment++; |
nkeynes@635 | 477 | int tile_x = SEGMENT_X(control); |
nkeynes@635 | 478 | int tile_y = SEGMENT_Y(control); |
nkeynes@635 | 479 | if( tile_x > max_tile_x ) { |
nkeynes@635 | 480 | max_tile_x = tile_x; |
nkeynes@635 | 481 | } |
nkeynes@635 | 482 | if( tile_y > max_tile_y ) { |
nkeynes@635 | 483 | max_tile_y = tile_y; |
nkeynes@635 | 484 | } |
nkeynes@635 | 485 | for( i=0; i<5; i++ ) { |
nkeynes@635 | 486 | if( (*segment & NO_POINTER) == 0 ) { |
nkeynes@635 | 487 | vertex_buffer_extract_polygons( *segment ); |
nkeynes@635 | 488 | } |
nkeynes@635 | 489 | segment++; |
nkeynes@635 | 490 | } |
nkeynes@635 | 491 | } while( (control & SEGMENT_END) == 0 ); |
nkeynes@635 | 492 | |
nkeynes@635 | 493 | pvr2_scene.buffer_width = (max_tile_x+1)<<5; |
nkeynes@635 | 494 | pvr2_scene.buffer_height = (max_tile_y+1)<<5; |
nkeynes@635 | 495 | |
nkeynes@635 | 496 | if( pvr2_scene.vertex_count > 0 ) { |
nkeynes@635 | 497 | // Pass 2: Extract vertex data |
nkeynes@635 | 498 | vertex_buffer_map(); |
nkeynes@635 | 499 | pvr2_scene.vertex_index = 0; |
nkeynes@635 | 500 | segment = tilebuffer; |
nkeynes@635 | 501 | do { |
nkeynes@635 | 502 | control = *segment++; |
nkeynes@635 | 503 | for( i=0; i<5; i++ ) { |
nkeynes@635 | 504 | if( (*segment & NO_POINTER) == 0 ) { |
nkeynes@635 | 505 | vertex_buffer_extract_vertexes( *segment ); |
nkeynes@635 | 506 | } |
nkeynes@635 | 507 | segment++; |
nkeynes@635 | 508 | } |
nkeynes@635 | 509 | } while( (control & SEGMENT_END) == 0 ); |
nkeynes@635 | 510 | |
nkeynes@635 | 511 | vertex_buffer_unmap(); |
nkeynes@635 | 512 | } |
nkeynes@635 | 513 | } |
nkeynes@635 | 514 | |
nkeynes@635 | 515 | /** |
nkeynes@635 | 516 | * Render the data in the scene structure. The GL target should already be setup. |
nkeynes@635 | 517 | * Note: thar be GL code here. |
nkeynes@635 | 518 | */ |
nkeynes@635 | 519 | void vertex_buffer_render() |
nkeynes@635 | 520 | { |
nkeynes@635 | 521 | /* Scene setup */ |
nkeynes@635 | 522 | |
nkeynes@635 | 523 | glEnable( GL_SCISSOR_TEST ); |
nkeynes@635 | 524 | |
nkeynes@635 | 525 | /* Scene render */ |
nkeynes@635 | 526 | struct tile_segment *segment = pvr2_scene.segment_list; |
nkeynes@635 | 527 | do { |
nkeynes@635 | 528 | |
nkeynes@635 | 529 | |
nkeynes@635 | 530 | } while( !IS_LAST_SEGMENT(segment) ); |
nkeynes@635 | 531 | glDisable( GL_SCISSOR_TEST ); |
nkeynes@635 | 532 | } |
.