nkeynes@635 | 1 | /**
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nkeynes@636 | 2 | * $Id$
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nkeynes@635 | 3 | *
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nkeynes@827 | 4 | * Manage the internal vertex/polygon buffers and scene data structure.
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nkeynes@635 | 5 | *
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nkeynes@635 | 6 | * Copyright (c) 2005 Nathan Keynes.
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nkeynes@635 | 7 | *
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nkeynes@635 | 8 | * This program is free software; you can redistribute it and/or modify
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nkeynes@635 | 9 | * it under the terms of the GNU General Public License as published by
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nkeynes@635 | 10 | * the Free Software Foundation; either version 2 of the License, or
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nkeynes@635 | 11 | * (at your option) any later version.
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nkeynes@635 | 12 | *
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nkeynes@635 | 13 | * This program is distributed in the hope that it will be useful,
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nkeynes@635 | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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nkeynes@635 | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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nkeynes@635 | 16 | * GNU General Public License for more details.
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nkeynes@635 | 17 | */
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nkeynes@635 | 18 |
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nkeynes@635 | 19 | #include <assert.h>
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nkeynes@635 | 20 | #include <string.h>
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nkeynes@645 | 21 | #include <math.h>
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nkeynes@635 | 22 | #include "lxdream.h"
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nkeynes@635 | 23 | #include "display.h"
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nkeynes@635 | 24 | #include "pvr2/pvr2.h"
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nkeynes@677 | 25 | #include "pvr2/pvr2mmio.h"
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nkeynes@635 | 26 | #include "pvr2/glutil.h"
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nkeynes@635 | 27 | #include "pvr2/scene.h"
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nkeynes@635 | 28 |
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nkeynes@863 | 29 | #define U8TOFLOAT(n) (((float)((n)+1))/256.0)
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nkeynes@1155 | 30 | #define POLY_IDX(addr) ( ((uint32_t *)addr) - ((uint32_t *)pvr2_scene.pvr2_pbuf))
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nkeynes@863 | 31 |
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nkeynes@687 | 32 | static void unpack_bgra(uint32_t bgra, float *rgba)
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nkeynes@687 | 33 | {
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nkeynes@687 | 34 | rgba[0] = ((float)(((bgra&0x00FF0000)>>16) + 1)) / 256.0;
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nkeynes@687 | 35 | rgba[1] = ((float)(((bgra&0x0000FF00)>>8) + 1)) / 256.0;
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nkeynes@687 | 36 | rgba[2] = ((float)((bgra&0x000000FF) + 1)) / 256.0;
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nkeynes@687 | 37 | rgba[3] = ((float)(((bgra&0xFF000000)>>24) + 1)) / 256.0;
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nkeynes@687 | 38 | }
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nkeynes@635 | 39 |
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nkeynes@639 | 40 | static inline uint32_t bgra_to_rgba(uint32_t bgra)
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nkeynes@639 | 41 | {
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nkeynes@639 | 42 | return (bgra&0xFF00FF00) | ((bgra&0x00FF0000)>>16) | ((bgra&0x000000FF)<<16);
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nkeynes@639 | 43 | }
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nkeynes@639 | 44 |
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nkeynes@645 | 45 | /**
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nkeynes@645 | 46 | * Convert a half-float (16-bit) FP number to a regular 32-bit float.
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nkeynes@645 | 47 | * Source is 1-bit sign, 5-bit exponent, 10-bit mantissa.
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nkeynes@645 | 48 | * TODO: Check the correctness of this.
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nkeynes@645 | 49 | */
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nkeynes@645 | 50 | static float halftofloat( uint16_t half )
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nkeynes@645 | 51 | {
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nkeynes@645 | 52 | union {
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nkeynes@645 | 53 | float f;
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nkeynes@645 | 54 | uint32_t i;
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nkeynes@645 | 55 | } temp;
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nkeynes@645 | 56 | temp.i = ((uint32_t)half)<<16;
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nkeynes@645 | 57 | return temp.f;
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nkeynes@645 | 58 | }
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nkeynes@645 | 59 |
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nkeynes@847 | 60 | static float parse_fog_density( uint32_t value )
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nkeynes@847 | 61 | {
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nkeynes@847 | 62 | union {
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nkeynes@847 | 63 | uint32_t i;
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nkeynes@847 | 64 | float f;
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nkeynes@847 | 65 | } u;
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nkeynes@847 | 66 | u.i = (((value+127)&0xFF)<<23)|((value & 0xFF00)<<7);
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nkeynes@847 | 67 | return u.f;
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nkeynes@847 | 68 | }
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nkeynes@645 | 69 |
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nkeynes@635 | 70 | struct pvr2_scene_struct pvr2_scene;
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nkeynes@1159 | 71 | static float scene_shadow_intensity = 0.0;
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nkeynes@1159 | 72 | static vertex_buffer_t vbuf = NULL;
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nkeynes@635 | 73 |
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nkeynes@1159 | 74 | static void vertex_buffer_map()
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nkeynes@1159 | 75 | {
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nkeynes@1159 | 76 | // Allow 8 vertexes for the background (4+4)
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nkeynes@1159 | 77 | uint32_t size = (pvr2_scene.vertex_count + 8) * sizeof(struct vertex_struct);
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nkeynes@1159 | 78 | pvr2_scene.vertex_array = vbuf->map(vbuf, size);
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nkeynes@1159 | 79 | }
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nkeynes@669 | 80 |
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nkeynes@1159 | 81 | static void vertex_buffer_unmap()
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nkeynes@1159 | 82 | {
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nkeynes@1159 | 83 | pvr2_scene.vertex_array = vbuf->unmap(vbuf);
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nkeynes@1159 | 84 | }
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nkeynes@635 | 85 |
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nkeynes@635 | 86 | /**
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nkeynes@1159 | 87 | * Allocate vertex buffer + temporary structures. GL context must have been initialized before this
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nkeynes@635 | 88 | * point.
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nkeynes@635 | 89 | */
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nkeynes@635 | 90 | void pvr2_scene_init()
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nkeynes@635 | 91 | {
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nkeynes@1159 | 92 | if( vbuf == NULL ) {
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nkeynes@1159 | 93 | vbuf = display_driver->create_vertex_buffer();
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nkeynes@736 | 94 | pvr2_scene.vertex_array = NULL;
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nkeynes@736 | 95 | pvr2_scene.vertex_array_size = 0;
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nkeynes@736 | 96 | pvr2_scene.poly_array = g_malloc( MAX_POLY_BUFFER_SIZE );
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nkeynes@736 | 97 | pvr2_scene.buf_to_poly_map = g_malloc0( BUF_POLY_MAP_SIZE );
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nkeynes@635 | 98 | }
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nkeynes@635 | 99 | }
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nkeynes@635 | 100 |
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nkeynes@639 | 101 | /**
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nkeynes@639 | 102 | * Clear the scene data structures in preparation for fresh data
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nkeynes@639 | 103 | */
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nkeynes@639 | 104 | void pvr2_scene_reset()
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nkeynes@639 | 105 | {
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nkeynes@1155 | 106 | /* Faster to just clear the active entries */
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nkeynes@1155 | 107 | for( int i=0; i<pvr2_scene.poly_count; i++ ) {
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nkeynes@1155 | 108 | pvr2_scene.buf_to_poly_map[POLY_IDX(pvr2_scene.poly_array[i].context)] = 0;
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nkeynes@1155 | 109 | }
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nkeynes@639 | 110 | pvr2_scene.poly_count = 0;
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nkeynes@639 | 111 | pvr2_scene.vertex_count = 0;
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nkeynes@1159 | 112 | }
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nkeynes@639 | 113 |
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nkeynes@635 | 114 | void pvr2_scene_shutdown()
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nkeynes@635 | 115 | {
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nkeynes@1159 | 116 | vbuf->destroy(vbuf);
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nkeynes@1159 | 117 | vbuf = NULL;
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nkeynes@635 | 118 | g_free( pvr2_scene.poly_array );
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nkeynes@645 | 119 | pvr2_scene.poly_array = NULL;
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nkeynes@635 | 120 | g_free( pvr2_scene.buf_to_poly_map );
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nkeynes@645 | 121 | pvr2_scene.buf_to_poly_map = NULL;
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nkeynes@635 | 122 | }
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nkeynes@635 | 123 |
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nkeynes@639 | 124 | static struct polygon_struct *scene_add_polygon( pvraddr_t poly_idx, int vertex_count,
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nkeynes@863 | 125 | shadow_mode_t is_modified )
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nkeynes@635 | 126 | {
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nkeynes@863 | 127 | int vert_mul = is_modified != SHADOW_NONE ? 2 : 1;
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nkeynes@635 | 128 |
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nkeynes@635 | 129 | if( pvr2_scene.buf_to_poly_map[poly_idx] != NULL ) {
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nkeynes@687 | 130 | if( vertex_count > pvr2_scene.buf_to_poly_map[poly_idx]->vertex_count ) {
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nkeynes@687 | 131 | pvr2_scene.vertex_count += (vertex_count - pvr2_scene.buf_to_poly_map[poly_idx]->vertex_count) * vert_mul;
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nkeynes@687 | 132 | pvr2_scene.buf_to_poly_map[poly_idx]->vertex_count = vertex_count;
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nkeynes@687 | 133 | }
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nkeynes@687 | 134 | return pvr2_scene.buf_to_poly_map[poly_idx];
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nkeynes@635 | 135 | } else {
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nkeynes@687 | 136 | struct polygon_struct *poly = &pvr2_scene.poly_array[pvr2_scene.poly_count++];
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nkeynes@687 | 137 | poly->context = &pvr2_scene.pvr2_pbuf[poly_idx];
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nkeynes@687 | 138 | poly->vertex_count = vertex_count;
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nkeynes@687 | 139 | poly->vertex_index = -1;
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nkeynes@687 | 140 | poly->mod_vertex_index = -1;
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nkeynes@687 | 141 | poly->next = NULL;
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nkeynes@1133 | 142 | poly->sub_next = NULL;
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nkeynes@687 | 143 | pvr2_scene.buf_to_poly_map[poly_idx] = poly;
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nkeynes@687 | 144 | pvr2_scene.vertex_count += (vertex_count * vert_mul);
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nkeynes@687 | 145 | return poly;
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nkeynes@635 | 146 | }
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nkeynes@635 | 147 | }
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nkeynes@635 | 148 |
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nkeynes@635 | 149 | /**
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nkeynes@1133 | 150 | * Given a starting polygon, break it at the specified triangle so that the
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nkeynes@1133 | 151 | * preceding triangles are retained, and the remainder are contained in a
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nkeynes@1133 | 152 | * new sub-polygon. Does not preserve winding.
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nkeynes@1133 | 153 | */
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nkeynes@1133 | 154 | static struct polygon_struct *scene_split_subpolygon( struct polygon_struct *parent, int split_offset )
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nkeynes@1133 | 155 | {
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nkeynes@1133 | 156 | assert( split_offset > 0 && split_offset < (parent->vertex_count-2) );
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nkeynes@1133 | 157 | assert( pvr2_scene.poly_count < MAX_POLYGONS );
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nkeynes@1133 | 158 | struct polygon_struct *poly = &pvr2_scene.poly_array[pvr2_scene.poly_count++];
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nkeynes@1133 | 159 | poly->vertex_count = parent->vertex_count - split_offset;
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nkeynes@1133 | 160 | poly->vertex_index = parent->vertex_index + split_offset;
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nkeynes@1133 | 161 | if( parent->mod_vertex_index == -1 ) {
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nkeynes@1133 | 162 | poly->mod_vertex_index = -1;
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nkeynes@1133 | 163 | } else {
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nkeynes@1133 | 164 | poly->mod_vertex_index = parent->mod_vertex_index + split_offset;
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nkeynes@1133 | 165 | }
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nkeynes@1133 | 166 | poly->context = parent->context;
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nkeynes@1133 | 167 | poly->next = NULL;
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nkeynes@1133 | 168 | poly->sub_next = parent->sub_next;
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nkeynes@1133 | 169 |
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nkeynes@1133 | 170 | parent->sub_next = poly;
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nkeynes@1133 | 171 | parent->vertex_count = split_offset + 2;
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nkeynes@1133 | 172 |
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nkeynes@1133 | 173 | return poly;
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nkeynes@1133 | 174 | }
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nkeynes@1133 | 175 |
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nkeynes@1140 | 176 | static float scene_get_palette_offset( uint32_t tex )
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nkeynes@1140 | 177 | {
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nkeynes@1140 | 178 | uint32_t fmt = (tex & PVR2_TEX_FORMAT_MASK);
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nkeynes@1140 | 179 | if( fmt == PVR2_TEX_FORMAT_IDX4 ) {
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nkeynes@1140 | 180 | return ((float)((tex & 0x07E00000) >> 17))/1024.0 + 0.0002;
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nkeynes@1140 | 181 | } else if( fmt == PVR2_TEX_FORMAT_IDX8 ) {
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nkeynes@1140 | 182 | return ((float)((tex & 0x06000000) >> 17))/1024.0 + 0.0002;
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nkeynes@1140 | 183 | } else {
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nkeynes@1140 | 184 | return -1.0;
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nkeynes@1140 | 185 | }
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nkeynes@1140 | 186 | }
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nkeynes@1140 | 187 |
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nkeynes@1133 | 188 | /**
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nkeynes@635 | 189 | * Decode a single PVR2 renderable vertex (opaque/trans/punch-out, but not shadow
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nkeynes@635 | 190 | * volume)
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nkeynes@635 | 191 | * @param vert Pointer to output vertex structure
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nkeynes@635 | 192 | * @param poly1 First word of polygon context (needed to understand vertex)
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nkeynes@639 | 193 | * @param poly2 Second word of polygon context
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nkeynes@635 | 194 | * @param pvr2_data Pointer to raw pvr2 vertex data (in VRAM)
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nkeynes@635 | 195 | * @param modify_offset Offset in 32-bit words to the tex/color data. 0 for
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nkeynes@635 | 196 | * the normal vertex, half the vertex length for the modified vertex.
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nkeynes@635 | 197 | */
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nkeynes@1159 | 198 | static void scene_decode_vertex( struct vertex_struct *vert, uint32_t poly1,
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nkeynes@1140 | 199 | uint32_t poly2, uint32_t tex, uint32_t *pvr2_data,
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nkeynes@736 | 200 | int modify_offset )
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nkeynes@635 | 201 | {
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nkeynes@639 | 202 | gboolean force_alpha = !POLY2_ALPHA_ENABLE(poly2);
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nkeynes@635 | 203 | union pvr2_data_type {
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nkeynes@687 | 204 | uint32_t *ival;
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nkeynes@687 | 205 | float *fval;
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nkeynes@635 | 206 | } data;
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nkeynes@635 | 207 |
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nkeynes@635 | 208 | data.ival = pvr2_data;
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nkeynes@687 | 209 |
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nkeynes@635 | 210 | vert->x = *data.fval++;
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nkeynes@635 | 211 | vert->y = *data.fval++;
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nkeynes@635 | 212 |
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nkeynes@635 | 213 | float z = *data.fval++;
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nkeynes@645 | 214 | if( !isfinite(z) ) {
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nkeynes@687 | 215 | z = 0;
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nkeynes@648 | 216 | } else if( z != 0 ) {
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nkeynes@687 | 217 | z = 1/z;
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nkeynes@645 | 218 | }
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nkeynes@635 | 219 | if( z > pvr2_scene.bounds[5] ) {
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nkeynes@687 | 220 | pvr2_scene.bounds[5] = z;
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nkeynes@635 | 221 | } else if( z < pvr2_scene.bounds[4] && z != 0 ) {
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nkeynes@687 | 222 | pvr2_scene.bounds[4] = z;
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nkeynes@635 | 223 | }
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nkeynes@635 | 224 | vert->z = z;
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nkeynes@635 | 225 | data.ival += modify_offset;
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nkeynes@635 | 226 |
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nkeynes@687 | 227 |
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nkeynes@635 | 228 | if( POLY1_TEXTURED(poly1) ) {
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nkeynes@687 | 229 | if( POLY1_UV16(poly1) ) {
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nkeynes@687 | 230 | vert->u = halftofloat( *data.ival>>16 );
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nkeynes@687 | 231 | vert->v = halftofloat( *data.ival );
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nkeynes@687 | 232 | data.ival++;
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nkeynes@687 | 233 | } else {
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nkeynes@687 | 234 | vert->u = *data.fval++;
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nkeynes@687 | 235 | vert->v = *data.fval++;
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nkeynes@687 | 236 | }
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nkeynes@1139 | 237 |
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nkeynes@1139 | 238 | switch( POLY2_TEX_BLEND(poly2) ) {
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nkeynes@1139 | 239 | case 0:/* Convert replace => modulate by setting colour values to 1.0 */
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nkeynes@1139 | 240 | vert->rgba[0] = vert->rgba[1] = vert->rgba[2] = vert->rgba[3] = 1.0;
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nkeynes@1140 | 241 | vert->tex_mode = 0.0;
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nkeynes@1139 | 242 | data.ival++; /* Skip the colour word */
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nkeynes@1139 | 243 | break;
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nkeynes@1140 | 244 | case 2: /* Decal */
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nkeynes@1140 | 245 | vert->tex_mode = 1.0;
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nkeynes@1140 | 246 | unpack_bgra(*data.ival++, vert->rgba);
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nkeynes@1140 | 247 | break;
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nkeynes@1139 | 248 | case 1:
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nkeynes@687 | 249 | force_alpha = TRUE;
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nkeynes@1139 | 250 | /* fall-through */
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nkeynes@1140 | 251 | default:
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nkeynes@1140 | 252 | vert->tex_mode = 0.0;
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nkeynes@1139 | 253 | unpack_bgra(*data.ival++, vert->rgba);
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nkeynes@1139 | 254 | break;
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nkeynes@687 | 255 | }
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nkeynes@1140 | 256 | vert->r = scene_get_palette_offset(tex);
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nkeynes@1139 | 257 | } else {
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nkeynes@1140 | 258 | vert->tex_mode = 2.0;
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nkeynes@1140 | 259 | vert->r = -1.0;
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nkeynes@1139 | 260 | unpack_bgra(*data.ival++, vert->rgba);
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nkeynes@635 | 261 | }
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nkeynes@1139 | 262 |
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nkeynes@687 | 263 | if( POLY1_SPECULAR(poly1) ) {
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nkeynes@687 | 264 | unpack_bgra(*data.ival++, vert->offset_rgba);
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nkeynes@687 | 265 | } else {
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nkeynes@687 | 266 | vert->offset_rgba[0] = 0.0;
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nkeynes@687 | 267 | vert->offset_rgba[1] = 0.0;
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nkeynes@687 | 268 | vert->offset_rgba[2] = 0.0;
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nkeynes@827 | 269 | vert->offset_rgba[3] = 0.0;
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nkeynes@687 | 270 | }
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nkeynes@687 | 271 |
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nkeynes@639 | 272 | if( force_alpha ) {
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nkeynes@687 | 273 | vert->rgba[3] = 1.0;
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nkeynes@635 | 274 | }
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nkeynes@635 | 275 | }
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nkeynes@635 | 276 |
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nkeynes@635 | 277 | /**
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nkeynes@687 | 278 | * Compute texture, colour, and z values for 1 or more result points by interpolating from
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nkeynes@687 | 279 | * a set of 3 input points. The result point(s) must define their x,y.
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nkeynes@635 | 280 | */
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nkeynes@827 | 281 | static void scene_compute_vertexes( struct vertex_struct *result,
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nkeynes@687 | 282 | int result_count,
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nkeynes@736 | 283 | struct vertex_struct *input,
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nkeynes@736 | 284 | gboolean is_solid_shaded )
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nkeynes@635 | 285 | {
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nkeynes@687 | 286 | int i,j;
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nkeynes@635 | 287 | float sx = input[2].x - input[1].x;
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nkeynes@635 | 288 | float sy = input[2].y - input[1].y;
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nkeynes@635 | 289 | float tx = input[0].x - input[1].x;
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nkeynes@635 | 290 | float ty = input[0].y - input[1].y;
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nkeynes@635 | 291 |
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nkeynes@635 | 292 | float detxy = ((sy) * (tx)) - ((ty) * (sx));
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nkeynes@635 | 293 | if( detxy == 0 ) {
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nkeynes@827 | 294 | // If the input points fall on a line, they don't define a usable
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nkeynes@687 | 295 | // polygon - the PVR2 takes the last input point as the result in
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nkeynes@687 | 296 | // this case.
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nkeynes@687 | 297 | for( i=0; i<result_count; i++ ) {
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nkeynes@687 | 298 | float x = result[i].x;
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nkeynes@687 | 299 | float y = result[i].y;
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nkeynes@687 | 300 | memcpy( &result[i], &input[2], sizeof(struct vertex_struct) );
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nkeynes@687 | 301 | result[i].x = x;
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nkeynes@687 | 302 | result[i].y = y;
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nkeynes@687 | 303 | }
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nkeynes@687 | 304 | return;
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nkeynes@635 | 305 | }
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nkeynes@635 | 306 | float sz = input[2].z - input[1].z;
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nkeynes@635 | 307 | float tz = input[0].z - input[1].z;
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nkeynes@635 | 308 | float su = input[2].u - input[1].u;
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nkeynes@635 | 309 | float tu = input[0].u - input[1].u;
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nkeynes@635 | 310 | float sv = input[2].v - input[1].v;
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nkeynes@635 | 311 | float tv = input[0].v - input[1].v;
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nkeynes@635 | 312 |
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nkeynes@687 | 313 | for( i=0; i<result_count; i++ ) {
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nkeynes@687 | 314 | float t = ((result[i].x - input[1].x) * sy -
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nkeynes@687 | 315 | (result[i].y - input[1].y) * sx) / detxy;
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nkeynes@687 | 316 | float s = ((result[i].y - input[1].y) * tx -
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nkeynes@687 | 317 | (result[i].x - input[1].x) * ty) / detxy;
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nkeynes@687 | 318 |
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nkeynes@687 | 319 | float rz = input[1].z + (t*tz) + (s*sz);
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nkeynes@687 | 320 | if( rz > pvr2_scene.bounds[5] ) {
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nkeynes@687 | 321 | pvr2_scene.bounds[5] = rz;
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nkeynes@687 | 322 | } else if( rz < pvr2_scene.bounds[4] ) {
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nkeynes@827 | 323 | pvr2_scene.bounds[4] = rz;
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nkeynes@687 | 324 | }
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nkeynes@687 | 325 | result[i].z = rz;
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nkeynes@687 | 326 | result[i].u = input[1].u + (t*tu) + (s*su);
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nkeynes@687 | 327 | result[i].v = input[1].v + (t*tv) + (s*sv);
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nkeynes@1140 | 328 | result[i].r = input[1].r; /* Last two components are flat */
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nkeynes@1140 | 329 | result[i].tex_mode = input[1].tex_mode;
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nkeynes@687 | 330 |
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nkeynes@687 | 331 | if( is_solid_shaded ) {
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nkeynes@687 | 332 | memcpy( result->rgba, input[2].rgba, sizeof(result->rgba) );
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nkeynes@687 | 333 | memcpy( result->offset_rgba, input[2].offset_rgba, sizeof(result->offset_rgba) );
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nkeynes@687 | 334 | } else {
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nkeynes@687 | 335 | float *rgba0 = input[0].rgba;
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nkeynes@687 | 336 | float *rgba1 = input[1].rgba;
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nkeynes@687 | 337 | float *rgba2 = input[2].rgba;
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nkeynes@687 | 338 | float *rgba3 = result[i].rgba;
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nkeynes@687 | 339 | for( j=0; j<8; j++ ) {
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nkeynes@687 | 340 | float tc = *rgba0++ - *rgba1;
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nkeynes@687 | 341 | float sc = *rgba2++ - *rgba1;
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nkeynes@687 | 342 | float rc = *rgba1++ + (t*tc) + (s*sc);
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nkeynes@687 | 343 | *rgba3++ = rc;
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nkeynes@687 | 344 | }
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nkeynes@687 | 345 | }
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nkeynes@635 | 346 | }
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nkeynes@653 | 347 | }
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nkeynes@635 | 348 |
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nkeynes@847 | 349 | static float scene_compute_lut_fog_vertex( float z, float fog_density, float fog_table[][2] )
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nkeynes@847 | 350 | {
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nkeynes@847 | 351 | union {
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nkeynes@847 | 352 | uint32_t i;
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nkeynes@847 | 353 | float f;
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nkeynes@847 | 354 | } v;
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nkeynes@847 | 355 | v.f = z * fog_density;
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nkeynes@847 | 356 | if( v.f < 1.0 ) v.f = 1.0;
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nkeynes@847 | 357 | else if( v.f > 255.9999 ) v.f = 255.9999;
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nkeynes@847 | 358 |
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nkeynes@847 | 359 | uint32_t index = ((v.i >> 18) & 0x0F)|((v.i>>19)&0x70);
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nkeynes@847 | 360 | return fog_table[index][0];
|
nkeynes@847 | 361 | }
|
nkeynes@847 | 362 |
|
nkeynes@847 | 363 | /**
|
nkeynes@847 | 364 | * Compute the fog coefficients for all polygons using lookup-table fog. It's
|
nkeynes@847 | 365 | * a little more convenient to do this as a separate pass, since we don't have
|
nkeynes@847 | 366 | * to worry about computed vertexes.
|
nkeynes@847 | 367 | */
|
nkeynes@847 | 368 | static void scene_compute_lut_fog( )
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nkeynes@847 | 369 | {
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nkeynes@847 | 370 | int i,j;
|
nkeynes@847 | 371 |
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nkeynes@847 | 372 | float fog_density = parse_fog_density(MMIO_READ( PVR2, RENDER_FOGCOEFF ));
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nkeynes@847 | 373 | float fog_table[128][2];
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nkeynes@847 | 374 |
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nkeynes@847 | 375 | /* Parse fog table out into floating-point format */
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nkeynes@847 | 376 | for( i=0; i<128; i++ ) {
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nkeynes@847 | 377 | uint32_t ent = MMIO_READ( PVR2, RENDER_FOGTABLE + (i<<2) );
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nkeynes@847 | 378 | fog_table[i][0] = ((float)(((ent&0x0000FF00)>>8) + 1)) / 256.0;
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nkeynes@847 | 379 | fog_table[i][1] = ((float)((ent&0x000000FF) + 1)) / 256.0;
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nkeynes@847 | 380 | }
|
nkeynes@847 | 381 |
|
nkeynes@847 | 382 |
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nkeynes@847 | 383 | for( i=0; i<pvr2_scene.poly_count; i++ ) {
|
nkeynes@847 | 384 | int mode = POLY2_FOG_MODE(pvr2_scene.poly_array[i].context[1]);
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nkeynes@1132 | 385 | uint32_t index = pvr2_scene.poly_array[i].vertex_index;
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nkeynes@847 | 386 | if( mode == PVR2_POLY_FOG_LOOKUP ) {
|
nkeynes@1132 | 387 | for( j=0; j<pvr2_scene.poly_array[i].vertex_count; j++ ) {
|
nkeynes@847 | 388 | pvr2_scene.vertex_array[index+j].offset_rgba[3] =
|
nkeynes@847 | 389 | scene_compute_lut_fog_vertex( pvr2_scene.vertex_array[index+j].z, fog_density, fog_table );
|
nkeynes@847 | 390 | }
|
nkeynes@847 | 391 | } else if( mode == PVR2_POLY_FOG_LOOKUP2 ) {
|
nkeynes@1132 | 392 | for( j=0; j<pvr2_scene.poly_array[i].vertex_count; j++ ) {
|
nkeynes@847 | 393 | pvr2_scene.vertex_array[index+j].rgba[0] = pvr2_scene.fog_lut_colour[0];
|
nkeynes@847 | 394 | pvr2_scene.vertex_array[index+j].rgba[1] = pvr2_scene.fog_lut_colour[1];
|
nkeynes@847 | 395 | pvr2_scene.vertex_array[index+j].rgba[2] = pvr2_scene.fog_lut_colour[2];
|
nkeynes@847 | 396 | pvr2_scene.vertex_array[index+j].rgba[3] =
|
nkeynes@847 | 397 | scene_compute_lut_fog_vertex( pvr2_scene.vertex_array[index+j].z, fog_density, fog_table );
|
nkeynes@1132 | 398 | pvr2_scene.vertex_array[index+j].offset_rgba[3] = 0;
|
nkeynes@1132 | 399 | }
|
nkeynes@1132 | 400 | } else if( mode == PVR2_POLY_FOG_DISABLED ) {
|
nkeynes@1132 | 401 | for( j=0; j<pvr2_scene.poly_array[i].vertex_count; j++ ) {
|
nkeynes@1132 | 402 | pvr2_scene.vertex_array[index+j].offset_rgba[3] = 0;
|
nkeynes@847 | 403 | }
|
nkeynes@847 | 404 | }
|
nkeynes@635 | 405 | }
|
nkeynes@847 | 406 | }
|
nkeynes@635 | 407 |
|
nkeynes@1133 | 408 | /**
|
nkeynes@1133 | 409 | * Manually cull back-facing polygons where we can - this actually saves
|
nkeynes@1133 | 410 | * us a lot of time vs passing everything to GL to do it.
|
nkeynes@1133 | 411 | */
|
nkeynes@1133 | 412 | static void scene_backface_cull()
|
nkeynes@1133 | 413 | {
|
nkeynes@1133 | 414 | unsigned poly_idx;
|
nkeynes@1133 | 415 | unsigned poly_count = pvr2_scene.poly_count; /* Note: we don't want to process any sub-polygons created here */
|
nkeynes@1133 | 416 | for( poly_idx = 0; poly_idx<poly_count; poly_idx++ ) {
|
nkeynes@1133 | 417 | uint32_t poly1 = pvr2_scene.poly_array[poly_idx].context[0];
|
nkeynes@1133 | 418 | if( POLY1_CULL_ENABLE(poly1) ) {
|
nkeynes@1133 | 419 | struct polygon_struct *poly = &pvr2_scene.poly_array[poly_idx];
|
nkeynes@1133 | 420 | unsigned vert_idx = poly->vertex_index;
|
nkeynes@1133 | 421 | unsigned tri_count = poly->vertex_count-2;
|
nkeynes@1133 | 422 | struct vertex_struct *vert = &pvr2_scene.vertex_array[vert_idx];
|
nkeynes@1133 | 423 | unsigned i;
|
nkeynes@1133 | 424 | gboolean ccw = (POLY1_CULL_MODE(poly1) == CULL_CCW);
|
nkeynes@1133 | 425 | int first_visible = -1, last_visible = -1;
|
nkeynes@1133 | 426 | for( i=0; i<tri_count; i++ ) {
|
nkeynes@1133 | 427 | float ux = vert[i+1].x - vert[i].x;
|
nkeynes@1133 | 428 | float uy = vert[i+1].y - vert[i].y;
|
nkeynes@1133 | 429 | float vx = vert[i+2].x - vert[i].x;
|
nkeynes@1133 | 430 | float vy = vert[i+2].y - vert[i].y;
|
nkeynes@1133 | 431 | float nz = (ux*vy) - (uy*vx);
|
nkeynes@1133 | 432 | if( ccw ? nz > 0 : nz < 0 ) {
|
nkeynes@1133 | 433 | /* Surface is visible */
|
nkeynes@1133 | 434 | if( first_visible == -1 ) {
|
nkeynes@1133 | 435 | first_visible = i;
|
nkeynes@1133 | 436 | /* Elide the initial hidden triangles (note we don't
|
nkeynes@1133 | 437 | * need to care about winding anymore here) */
|
nkeynes@1133 | 438 | poly->vertex_index += i;
|
nkeynes@1133 | 439 | poly->vertex_count -= i;
|
nkeynes@1133 | 440 | if( poly->mod_vertex_index != -1 )
|
nkeynes@1133 | 441 | poly->mod_vertex_index += i;
|
nkeynes@1133 | 442 | } else if( last_visible != i-1 ) {
|
nkeynes@1133 | 443 | /* And... here we have to split the polygon. Allocate a new
|
nkeynes@1133 | 444 | * sub-polygon to hold the vertex references */
|
nkeynes@1133 | 445 | struct polygon_struct *sub = scene_split_subpolygon(poly, (i-first_visible));
|
nkeynes@1133 | 446 | poly->vertex_count -= (i-first_visible-1) - last_visible;
|
nkeynes@1133 | 447 | first_visible = i;
|
nkeynes@1133 | 448 | poly = sub;
|
nkeynes@1133 | 449 | }
|
nkeynes@1133 | 450 | last_visible = i;
|
nkeynes@1133 | 451 | } /* Else culled */
|
nkeynes@1133 | 452 | /* Invert ccw flag for triangle strip processing */
|
nkeynes@1133 | 453 | ccw = !ccw;
|
nkeynes@1133 | 454 | }
|
nkeynes@1133 | 455 | if( last_visible == -1 ) {
|
nkeynes@1133 | 456 | /* No visible surfaces, so we can mark the whole polygon as being vertex-less */
|
nkeynes@1133 | 457 | poly->vertex_count = 0;
|
nkeynes@1133 | 458 | } else if( last_visible != tri_count-1 ) {
|
nkeynes@1133 | 459 | /* Remove final hidden tris */
|
nkeynes@1133 | 460 | poly->vertex_count -= (tri_count - 1 - last_visible);
|
nkeynes@1133 | 461 | }
|
nkeynes@1133 | 462 | }
|
nkeynes@1133 | 463 | }
|
nkeynes@1133 | 464 | }
|
nkeynes@1133 | 465 |
|
nkeynes@863 | 466 | static void scene_add_cheap_shadow_vertexes( struct vertex_struct *src, struct vertex_struct *dest, int count )
|
nkeynes@863 | 467 | {
|
nkeynes@863 | 468 | unsigned int i, j;
|
nkeynes@863 | 469 |
|
nkeynes@863 | 470 | for( i=0; i<count; i++ ) {
|
nkeynes@863 | 471 | dest->x = src->x;
|
nkeynes@863 | 472 | dest->y = src->y;
|
nkeynes@863 | 473 | dest->z = src->z;
|
nkeynes@863 | 474 | dest->u = src->u;
|
nkeynes@863 | 475 | dest->v = src->v;
|
nkeynes@1140 | 476 | dest->r = src->r;
|
nkeynes@1140 | 477 | dest->tex_mode = src->tex_mode;
|
nkeynes@863 | 478 | dest->rgba[0] = src->rgba[0] * scene_shadow_intensity;
|
nkeynes@863 | 479 | dest->rgba[1] = src->rgba[1] * scene_shadow_intensity;
|
nkeynes@863 | 480 | dest->rgba[2] = src->rgba[2] * scene_shadow_intensity;
|
nkeynes@863 | 481 | dest->rgba[3] = src->rgba[3] * scene_shadow_intensity;
|
nkeynes@863 | 482 | dest->offset_rgba[0] = src->offset_rgba[0] * scene_shadow_intensity;
|
nkeynes@863 | 483 | dest->offset_rgba[1] = src->offset_rgba[1] * scene_shadow_intensity;
|
nkeynes@863 | 484 | dest->offset_rgba[2] = src->offset_rgba[2] * scene_shadow_intensity;
|
nkeynes@863 | 485 | dest->offset_rgba[3] = src->offset_rgba[3];
|
nkeynes@863 | 486 | dest++;
|
nkeynes@863 | 487 | src++;
|
nkeynes@863 | 488 | }
|
nkeynes@635 | 489 | }
|
nkeynes@635 | 490 |
|
nkeynes@639 | 491 | static void scene_add_vertexes( pvraddr_t poly_idx, int vertex_length,
|
nkeynes@863 | 492 | shadow_mode_t is_modified )
|
nkeynes@635 | 493 | {
|
nkeynes@635 | 494 | struct polygon_struct *poly = pvr2_scene.buf_to_poly_map[poly_idx];
|
nkeynes@635 | 495 | uint32_t *ptr = &pvr2_scene.pvr2_pbuf[poly_idx];
|
nkeynes@635 | 496 | uint32_t *context = ptr;
|
nkeynes@635 | 497 | unsigned int i;
|
nkeynes@635 | 498 |
|
nkeynes@635 | 499 | if( poly->vertex_index == -1 ) {
|
nkeynes@863 | 500 | ptr += (is_modified == SHADOW_FULL ? 5 : 3 );
|
nkeynes@687 | 501 | poly->vertex_index = pvr2_scene.vertex_index;
|
nkeynes@687 | 502 |
|
nkeynes@687 | 503 | assert( poly != NULL );
|
nkeynes@687 | 504 | assert( pvr2_scene.vertex_index + poly->vertex_count <= pvr2_scene.vertex_count );
|
nkeynes@687 | 505 | for( i=0; i<poly->vertex_count; i++ ) {
|
nkeynes@1159 | 506 | scene_decode_vertex( &pvr2_scene.vertex_array[pvr2_scene.vertex_index++], context[0], context[1], context[2], ptr, 0 );
|
nkeynes@687 | 507 | ptr += vertex_length;
|
nkeynes@687 | 508 | }
|
nkeynes@687 | 509 | if( is_modified ) {
|
nkeynes@687 | 510 | assert( pvr2_scene.vertex_index + poly->vertex_count <= pvr2_scene.vertex_count );
|
nkeynes@687 | 511 | poly->mod_vertex_index = pvr2_scene.vertex_index;
|
nkeynes@863 | 512 | if( is_modified == SHADOW_FULL ) {
|
nkeynes@863 | 513 | int mod_offset = (vertex_length - 3)>>1;
|
nkeynes@863 | 514 | ptr = &pvr2_scene.pvr2_pbuf[poly_idx] + 5;
|
nkeynes@863 | 515 | for( i=0; i<poly->vertex_count; i++ ) {
|
nkeynes@1159 | 516 | scene_decode_vertex( &pvr2_scene.vertex_array[pvr2_scene.vertex_index++], context[0], context[3], context[4], ptr, mod_offset );
|
nkeynes@863 | 517 | ptr += vertex_length;
|
nkeynes@863 | 518 | }
|
nkeynes@863 | 519 | } else {
|
nkeynes@863 | 520 | scene_add_cheap_shadow_vertexes( &pvr2_scene.vertex_array[poly->vertex_index],
|
nkeynes@863 | 521 | &pvr2_scene.vertex_array[poly->mod_vertex_index], poly->vertex_count );
|
nkeynes@863 | 522 | pvr2_scene.vertex_index += poly->vertex_count;
|
nkeynes@687 | 523 | }
|
nkeynes@687 | 524 | }
|
nkeynes@635 | 525 | }
|
nkeynes@635 | 526 | }
|
nkeynes@635 | 527 |
|
nkeynes@827 | 528 | static void scene_add_quad_vertexes( pvraddr_t poly_idx, int vertex_length,
|
nkeynes@863 | 529 | shadow_mode_t is_modified )
|
nkeynes@635 | 530 | {
|
nkeynes@635 | 531 | struct polygon_struct *poly = pvr2_scene.buf_to_poly_map[poly_idx];
|
nkeynes@635 | 532 | uint32_t *ptr = &pvr2_scene.pvr2_pbuf[poly_idx];
|
nkeynes@635 | 533 | uint32_t *context = ptr;
|
nkeynes@635 | 534 | unsigned int i;
|
nkeynes@635 | 535 |
|
nkeynes@635 | 536 | if( poly->vertex_index == -1 ) {
|
nkeynes@827 | 537 | // Construct it locally and copy to the vertex buffer, as the VBO is
|
nkeynes@736 | 538 | // allowed to be horribly slow for reads (ie it could be direct-mapped
|
nkeynes@736 | 539 | // vram).
|
nkeynes@736 | 540 | struct vertex_struct quad[4];
|
nkeynes@736 | 541 |
|
nkeynes@736 | 542 | assert( poly != NULL );
|
nkeynes@736 | 543 | assert( pvr2_scene.vertex_index + poly->vertex_count <= pvr2_scene.vertex_count );
|
nkeynes@863 | 544 | ptr += (is_modified == SHADOW_FULL ? 5 : 3 );
|
nkeynes@736 | 545 | poly->vertex_index = pvr2_scene.vertex_index;
|
nkeynes@736 | 546 | for( i=0; i<4; i++ ) {
|
nkeynes@1159 | 547 | scene_decode_vertex( &quad[i], context[0], context[1], context[2], ptr, 0 );
|
nkeynes@736 | 548 | ptr += vertex_length;
|
nkeynes@736 | 549 | }
|
nkeynes@687 | 550 | scene_compute_vertexes( &quad[3], 1, &quad[0], !POLY1_GOURAUD_SHADED(context[0]) );
|
nkeynes@736 | 551 | // Swap last two vertexes (quad arrangement => tri strip arrangement)
|
nkeynes@736 | 552 | memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index], quad, sizeof(struct vertex_struct)*2 );
|
nkeynes@736 | 553 | memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index+2], &quad[3], sizeof(struct vertex_struct) );
|
nkeynes@736 | 554 | memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index+3], &quad[2], sizeof(struct vertex_struct) );
|
nkeynes@1240 | 555 | if( !POLY1_GOURAUD_SHADED(context[0]) ) {
|
nkeynes@1240 | 556 | memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index].rgba, &pvr2_scene.vertex_array[pvr2_scene.vertex_index+3].rgba, sizeof(float)*8 );
|
nkeynes@1240 | 557 | memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index+1].rgba, &pvr2_scene.vertex_array[pvr2_scene.vertex_index+3].rgba, sizeof(float)*8 );
|
nkeynes@1240 | 558 | }
|
nkeynes@1240 | 559 |
|
nkeynes@736 | 560 | pvr2_scene.vertex_index += 4;
|
nkeynes@736 | 561 |
|
nkeynes@736 | 562 | if( is_modified ) {
|
nkeynes@736 | 563 | assert( pvr2_scene.vertex_index + poly->vertex_count <= pvr2_scene.vertex_count );
|
nkeynes@736 | 564 | poly->mod_vertex_index = pvr2_scene.vertex_index;
|
nkeynes@863 | 565 | if( is_modified == SHADOW_FULL ) {
|
nkeynes@863 | 566 | int mod_offset = (vertex_length - 3)>>1;
|
nkeynes@863 | 567 | ptr = &pvr2_scene.pvr2_pbuf[poly_idx] + 5;
|
nkeynes@863 | 568 | for( i=0; i<4; i++ ) {
|
nkeynes@1159 | 569 | scene_decode_vertex( &quad[4], context[0], context[3], context[4], ptr, mod_offset );
|
nkeynes@863 | 570 | ptr += vertex_length;
|
nkeynes@863 | 571 | }
|
nkeynes@863 | 572 | scene_compute_vertexes( &quad[3], 1, &quad[0], !POLY1_GOURAUD_SHADED(context[0]) );
|
nkeynes@863 | 573 | memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index], quad, sizeof(struct vertex_struct)*2 );
|
nkeynes@863 | 574 | memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index+2], &quad[3], sizeof(struct vertex_struct) );
|
nkeynes@863 | 575 | memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index+3], &quad[2], sizeof(struct vertex_struct) );
|
nkeynes@1240 | 576 | if( !POLY1_GOURAUD_SHADED(context[0]) ) {
|
nkeynes@1240 | 577 | memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index].rgba, &pvr2_scene.vertex_array[pvr2_scene.vertex_index+3].rgba, sizeof(float)*8 );
|
nkeynes@1240 | 578 | memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index+1].rgba, &pvr2_scene.vertex_array[pvr2_scene.vertex_index+3].rgba, sizeof(float)*8 );
|
nkeynes@1240 | 579 | }
|
nkeynes@863 | 580 | } else {
|
nkeynes@863 | 581 | scene_add_cheap_shadow_vertexes( &pvr2_scene.vertex_array[poly->vertex_index],
|
nkeynes@863 | 582 | &pvr2_scene.vertex_array[poly->mod_vertex_index], poly->vertex_count );
|
nkeynes@863 | 583 | pvr2_scene.vertex_index += poly->vertex_count;
|
nkeynes@736 | 584 | }
|
nkeynes@736 | 585 | pvr2_scene.vertex_index += 4;
|
nkeynes@736 | 586 | }
|
nkeynes@635 | 587 | }
|
nkeynes@635 | 588 | }
|
nkeynes@635 | 589 |
|
nkeynes@639 | 590 | static void scene_extract_polygons( pvraddr_t tile_entry )
|
nkeynes@635 | 591 | {
|
nkeynes@934 | 592 | uint32_t *tile_list = (uint32_t *)(pvr2_main_ram+tile_entry);
|
nkeynes@635 | 593 | do {
|
nkeynes@687 | 594 | uint32_t entry = *tile_list++;
|
nkeynes@687 | 595 | if( entry >> 28 == 0x0F ) {
|
nkeynes@687 | 596 | break;
|
nkeynes@687 | 597 | } else if( entry >> 28 == 0x0E ) {
|
nkeynes@934 | 598 | tile_list = (uint32_t *)(pvr2_main_ram + (entry&0x007FFFFF));
|
nkeynes@687 | 599 | } else {
|
nkeynes@687 | 600 | pvraddr_t polyaddr = entry&0x000FFFFF;
|
nkeynes@863 | 601 | shadow_mode_t is_modified = (entry & 0x01000000) ? pvr2_scene.shadow_mode : SHADOW_NONE;
|
nkeynes@687 | 602 | int vertex_length = (entry >> 21) & 0x07;
|
nkeynes@687 | 603 | int context_length = 3;
|
nkeynes@863 | 604 | if( is_modified == SHADOW_FULL ) {
|
nkeynes@687 | 605 | context_length = 5;
|
nkeynes@687 | 606 | vertex_length <<= 1 ;
|
nkeynes@687 | 607 | }
|
nkeynes@687 | 608 | vertex_length += 3;
|
nkeynes@687 | 609 |
|
nkeynes@687 | 610 | if( (entry & 0xE0000000) == 0x80000000 ) {
|
nkeynes@687 | 611 | /* Triangle(s) */
|
nkeynes@687 | 612 | int strip_count = ((entry >> 25) & 0x0F)+1;
|
nkeynes@687 | 613 | int polygon_length = 3 * vertex_length + context_length;
|
nkeynes@687 | 614 | int i;
|
nkeynes@687 | 615 | struct polygon_struct *last_poly = NULL;
|
nkeynes@687 | 616 | for( i=0; i<strip_count; i++ ) {
|
nkeynes@687 | 617 | struct polygon_struct *poly = scene_add_polygon( polyaddr, 3, is_modified );
|
nkeynes@687 | 618 | polyaddr += polygon_length;
|
nkeynes@687 | 619 | if( last_poly != NULL && last_poly->next == NULL ) {
|
nkeynes@687 | 620 | last_poly->next = poly;
|
nkeynes@687 | 621 | }
|
nkeynes@687 | 622 | last_poly = poly;
|
nkeynes@687 | 623 | }
|
nkeynes@687 | 624 | } else if( (entry & 0xE0000000) == 0xA0000000 ) {
|
nkeynes@687 | 625 | /* Sprite(s) */
|
nkeynes@687 | 626 | int strip_count = ((entry >> 25) & 0x0F)+1;
|
nkeynes@687 | 627 | int polygon_length = 4 * vertex_length + context_length;
|
nkeynes@687 | 628 | int i;
|
nkeynes@687 | 629 | struct polygon_struct *last_poly = NULL;
|
nkeynes@687 | 630 | for( i=0; i<strip_count; i++ ) {
|
nkeynes@687 | 631 | struct polygon_struct *poly = scene_add_polygon( polyaddr, 4, is_modified );
|
nkeynes@687 | 632 | polyaddr += polygon_length;
|
nkeynes@687 | 633 | if( last_poly != NULL && last_poly->next == NULL ) {
|
nkeynes@687 | 634 | last_poly->next = poly;
|
nkeynes@687 | 635 | }
|
nkeynes@687 | 636 | last_poly = poly;
|
nkeynes@687 | 637 | }
|
nkeynes@687 | 638 | } else {
|
nkeynes@687 | 639 | /* Polygon */
|
nkeynes@687 | 640 | int i, last = -1;
|
nkeynes@687 | 641 | for( i=5; i>=0; i-- ) {
|
nkeynes@687 | 642 | if( entry & (0x40000000>>i) ) {
|
nkeynes@687 | 643 | last = i;
|
nkeynes@687 | 644 | break;
|
nkeynes@687 | 645 | }
|
nkeynes@687 | 646 | }
|
nkeynes@687 | 647 | if( last != -1 ) {
|
nkeynes@687 | 648 | scene_add_polygon( polyaddr, last+3, is_modified );
|
nkeynes@687 | 649 | }
|
nkeynes@687 | 650 | }
|
nkeynes@687 | 651 | }
|
nkeynes@635 | 652 | } while( 1 );
|
nkeynes@635 | 653 | }
|
nkeynes@635 | 654 |
|
nkeynes@639 | 655 | static void scene_extract_vertexes( pvraddr_t tile_entry )
|
nkeynes@635 | 656 | {
|
nkeynes@934 | 657 | uint32_t *tile_list = (uint32_t *)(pvr2_main_ram+tile_entry);
|
nkeynes@635 | 658 | do {
|
nkeynes@736 | 659 | uint32_t entry = *tile_list++;
|
nkeynes@736 | 660 | if( entry >> 28 == 0x0F ) {
|
nkeynes@736 | 661 | break;
|
nkeynes@736 | 662 | } else if( entry >> 28 == 0x0E ) {
|
nkeynes@934 | 663 | tile_list = (uint32_t *)(pvr2_main_ram + (entry&0x007FFFFF));
|
nkeynes@736 | 664 | } else {
|
nkeynes@736 | 665 | pvraddr_t polyaddr = entry&0x000FFFFF;
|
nkeynes@863 | 666 | shadow_mode_t is_modified = (entry & 0x01000000) ? pvr2_scene.shadow_mode : SHADOW_NONE;
|
nkeynes@736 | 667 | int vertex_length = (entry >> 21) & 0x07;
|
nkeynes@736 | 668 | int context_length = 3;
|
nkeynes@863 | 669 | if( is_modified == SHADOW_FULL ) {
|
nkeynes@736 | 670 | context_length = 5;
|
nkeynes@736 | 671 | vertex_length <<=1 ;
|
nkeynes@736 | 672 | }
|
nkeynes@736 | 673 | vertex_length += 3;
|
nkeynes@736 | 674 |
|
nkeynes@736 | 675 | if( (entry & 0xE0000000) == 0x80000000 ) {
|
nkeynes@736 | 676 | /* Triangle(s) */
|
nkeynes@736 | 677 | int strip_count = ((entry >> 25) & 0x0F)+1;
|
nkeynes@736 | 678 | int polygon_length = 3 * vertex_length + context_length;
|
nkeynes@736 | 679 | int i;
|
nkeynes@736 | 680 | for( i=0; i<strip_count; i++ ) {
|
nkeynes@736 | 681 | scene_add_vertexes( polyaddr, vertex_length, is_modified );
|
nkeynes@736 | 682 | polyaddr += polygon_length;
|
nkeynes@736 | 683 | }
|
nkeynes@736 | 684 | } else if( (entry & 0xE0000000) == 0xA0000000 ) {
|
nkeynes@736 | 685 | /* Sprite(s) */
|
nkeynes@736 | 686 | int strip_count = ((entry >> 25) & 0x0F)+1;
|
nkeynes@736 | 687 | int polygon_length = 4 * vertex_length + context_length;
|
nkeynes@736 | 688 | int i;
|
nkeynes@736 | 689 | for( i=0; i<strip_count; i++ ) {
|
nkeynes@736 | 690 | scene_add_quad_vertexes( polyaddr, vertex_length, is_modified );
|
nkeynes@736 | 691 | polyaddr += polygon_length;
|
nkeynes@736 | 692 | }
|
nkeynes@736 | 693 | } else {
|
nkeynes@736 | 694 | /* Polygon */
|
nkeynes@736 | 695 | int i, last = -1;
|
nkeynes@736 | 696 | for( i=5; i>=0; i-- ) {
|
nkeynes@736 | 697 | if( entry & (0x40000000>>i) ) {
|
nkeynes@736 | 698 | last = i;
|
nkeynes@736 | 699 | break;
|
nkeynes@736 | 700 | }
|
nkeynes@736 | 701 | }
|
nkeynes@736 | 702 | if( last != -1 ) {
|
nkeynes@736 | 703 | scene_add_vertexes( polyaddr, vertex_length, is_modified );
|
nkeynes@736 | 704 | }
|
nkeynes@736 | 705 | }
|
nkeynes@736 | 706 | }
|
nkeynes@827 | 707 | } while( 1 );
|
nkeynes@635 | 708 | }
|
nkeynes@635 | 709 |
|
nkeynes@687 | 710 | static void scene_extract_background( void )
|
nkeynes@687 | 711 | {
|
nkeynes@687 | 712 | uint32_t bgplane = MMIO_READ(PVR2, RENDER_BGPLANE);
|
nkeynes@687 | 713 | int vertex_length = (bgplane >> 24) & 0x07;
|
nkeynes@687 | 714 | int context_length = 3, i;
|
nkeynes@863 | 715 | shadow_mode_t is_modified = (bgplane & 0x08000000) ? pvr2_scene.shadow_mode : SHADOW_NONE;
|
nkeynes@687 | 716 |
|
nkeynes@687 | 717 | struct polygon_struct *poly = &pvr2_scene.poly_array[pvr2_scene.poly_count++];
|
nkeynes@687 | 718 | uint32_t *context = &pvr2_scene.pvr2_pbuf[(bgplane & 0x00FFFFFF)>>3];
|
nkeynes@687 | 719 | poly->context = context;
|
nkeynes@687 | 720 | poly->vertex_count = 4;
|
nkeynes@687 | 721 | poly->vertex_index = pvr2_scene.vertex_count;
|
nkeynes@863 | 722 | if( is_modified == SHADOW_FULL ) {
|
nkeynes@687 | 723 | context_length = 5;
|
nkeynes@687 | 724 | vertex_length <<= 1;
|
nkeynes@863 | 725 | }
|
nkeynes@863 | 726 | if( is_modified != SHADOW_NONE ) {
|
nkeynes@687 | 727 | poly->mod_vertex_index = pvr2_scene.vertex_count + 4;
|
nkeynes@827 | 728 | pvr2_scene.vertex_count += 8;
|
nkeynes@687 | 729 | } else {
|
nkeynes@687 | 730 | poly->mod_vertex_index = -1;
|
nkeynes@687 | 731 | pvr2_scene.vertex_count += 4;
|
nkeynes@687 | 732 | }
|
nkeynes@687 | 733 | vertex_length += 3;
|
nkeynes@687 | 734 | context_length += (bgplane & 0x07) * vertex_length;
|
nkeynes@687 | 735 |
|
nkeynes@687 | 736 | poly->next = NULL;
|
nkeynes@1133 | 737 | poly->sub_next = NULL;
|
nkeynes@687 | 738 | pvr2_scene.bkgnd_poly = poly;
|
nkeynes@736 | 739 |
|
nkeynes@687 | 740 | struct vertex_struct base_vertexes[3];
|
nkeynes@827 | 741 | uint32_t *ptr = context + context_length;
|
nkeynes@687 | 742 | for( i=0; i<3; i++ ) {
|
nkeynes@1159 | 743 | scene_decode_vertex( &base_vertexes[i], context[0], context[1], context[2],
|
nkeynes@736 | 744 | ptr, 0 );
|
nkeynes@687 | 745 | ptr += vertex_length;
|
nkeynes@687 | 746 | }
|
nkeynes@687 | 747 | struct vertex_struct *result_vertexes = &pvr2_scene.vertex_array[poly->vertex_index];
|
nkeynes@687 | 748 | result_vertexes[0].x = result_vertexes[0].y = 0;
|
nkeynes@687 | 749 | result_vertexes[1].x = result_vertexes[3].x = pvr2_scene.buffer_width;
|
nkeynes@687 | 750 | result_vertexes[1].y = result_vertexes[2].x = 0;
|
nkeynes@687 | 751 | result_vertexes[2].y = result_vertexes[3].y = pvr2_scene.buffer_height;
|
nkeynes@687 | 752 | scene_compute_vertexes( result_vertexes, 4, base_vertexes, !POLY1_GOURAUD_SHADED(context[0]) );
|
nkeynes@687 | 753 |
|
nkeynes@863 | 754 | if( is_modified == SHADOW_FULL ) {
|
nkeynes@687 | 755 | int mod_offset = (vertex_length - 3)>>1;
|
nkeynes@687 | 756 | ptr = context + context_length;
|
nkeynes@687 | 757 | for( i=0; i<3; i++ ) {
|
nkeynes@1159 | 758 | scene_decode_vertex( &base_vertexes[i], context[0], context[3], context[4],
|
nkeynes@736 | 759 | ptr, mod_offset );
|
nkeynes@687 | 760 | ptr += vertex_length;
|
nkeynes@687 | 761 | }
|
nkeynes@687 | 762 | result_vertexes = &pvr2_scene.vertex_array[poly->mod_vertex_index];
|
nkeynes@687 | 763 | result_vertexes[0].x = result_vertexes[0].y = 0;
|
nkeynes@687 | 764 | result_vertexes[1].x = result_vertexes[3].x = pvr2_scene.buffer_width;
|
nkeynes@687 | 765 | result_vertexes[1].y = result_vertexes[2].x = 0;
|
nkeynes@687 | 766 | result_vertexes[2].y = result_vertexes[3].y = pvr2_scene.buffer_height;
|
nkeynes@687 | 767 | scene_compute_vertexes( result_vertexes, 4, base_vertexes, !POLY1_GOURAUD_SHADED(context[0]) );
|
nkeynes@863 | 768 | } else if( is_modified == SHADOW_CHEAP ) {
|
nkeynes@863 | 769 | scene_add_cheap_shadow_vertexes( &pvr2_scene.vertex_array[poly->vertex_index],
|
nkeynes@863 | 770 | &pvr2_scene.vertex_array[poly->mod_vertex_index], poly->vertex_count );
|
nkeynes@863 | 771 | pvr2_scene.vertex_index += poly->vertex_count;
|
nkeynes@687 | 772 | }
|
nkeynes@736 | 773 |
|
nkeynes@687 | 774 | }
|
nkeynes@687 | 775 |
|
nkeynes@687 | 776 |
|
nkeynes@639 | 777 | uint32_t pvr2_scene_buffer_width()
|
nkeynes@639 | 778 | {
|
nkeynes@639 | 779 | return pvr2_scene.buffer_width;
|
nkeynes@639 | 780 | }
|
nkeynes@639 | 781 |
|
nkeynes@639 | 782 | uint32_t pvr2_scene_buffer_height()
|
nkeynes@639 | 783 | {
|
nkeynes@639 | 784 | return pvr2_scene.buffer_height;
|
nkeynes@639 | 785 | }
|
nkeynes@639 | 786 |
|
nkeynes@635 | 787 | /**
|
nkeynes@635 | 788 | * Extract the current scene into the rendering structures. We run two passes
|
nkeynes@827 | 789 | * - first pass extracts the polygons into pvr2_scene.poly_array (finding vertex counts),
|
nkeynes@635 | 790 | * second pass extracts the vertex data into the VBO/vertex array.
|
nkeynes@635 | 791 | *
|
nkeynes@827 | 792 | * Difficult to do in single pass as we don't generally know the size of a
|
nkeynes@635 | 793 | * polygon for certain until we've seen all tiles containing it. It also means we
|
nkeynes@635 | 794 | * can count the vertexes and allocate the appropriate size VBO.
|
nkeynes@635 | 795 | *
|
nkeynes@635 | 796 | * FIXME: accesses into VRAM need to be bounds-checked properly
|
nkeynes@635 | 797 | */
|
nkeynes@635 | 798 | void pvr2_scene_read( void )
|
nkeynes@635 | 799 | {
|
nkeynes@635 | 800 | pvr2_scene_init();
|
nkeynes@639 | 801 | pvr2_scene_reset();
|
nkeynes@635 | 802 |
|
nkeynes@635 | 803 | pvr2_scene.bounds[0] = MMIO_READ( PVR2, RENDER_HCLIP ) & 0x03FF;
|
nkeynes@635 | 804 | pvr2_scene.bounds[1] = ((MMIO_READ( PVR2, RENDER_HCLIP ) >> 16) & 0x03FF) + 1;
|
nkeynes@635 | 805 | pvr2_scene.bounds[2] = MMIO_READ( PVR2, RENDER_VCLIP ) & 0x03FF;
|
nkeynes@635 | 806 | pvr2_scene.bounds[3] = ((MMIO_READ( PVR2, RENDER_VCLIP ) >> 16) & 0x03FF) + 1;
|
nkeynes@635 | 807 | pvr2_scene.bounds[4] = pvr2_scene.bounds[5] = MMIO_READF( PVR2, RENDER_FARCLIP );
|
nkeynes@635 | 808 |
|
nkeynes@827 | 809 | uint32_t scaler = MMIO_READ( PVR2, RENDER_SCALER );
|
nkeynes@827 | 810 | if( scaler & SCALER_HSCALE ) {
|
nkeynes@827 | 811 | /* If the horizontal scaler is in use, we're (in principle) supposed to
|
nkeynes@827 | 812 | * divide everything by 2. However in the interests of display quality,
|
nkeynes@827 | 813 | * instead we want to render to the unscaled resolution and downsample
|
nkeynes@827 | 814 | * only if/when required.
|
nkeynes@827 | 815 | */
|
nkeynes@827 | 816 | pvr2_scene.bounds[1] *= 2;
|
nkeynes@827 | 817 | }
|
nkeynes@847 | 818 |
|
nkeynes@847 | 819 | uint32_t fog_col = MMIO_READ( PVR2, RENDER_FOGTBLCOL );
|
nkeynes@847 | 820 | unpack_bgra( fog_col, pvr2_scene.fog_lut_colour );
|
nkeynes@847 | 821 | fog_col = MMIO_READ( PVR2, RENDER_FOGVRTCOL );
|
nkeynes@847 | 822 | unpack_bgra( fog_col, pvr2_scene.fog_vert_colour );
|
nkeynes@847 | 823 |
|
nkeynes@934 | 824 | uint32_t *tilebuffer = (uint32_t *)(pvr2_main_ram + MMIO_READ( PVR2, RENDER_TILEBASE ));
|
nkeynes@635 | 825 | uint32_t *segment = tilebuffer;
|
nkeynes@863 | 826 | uint32_t shadow = MMIO_READ(PVR2,RENDER_SHADOW);
|
nkeynes@635 | 827 | pvr2_scene.segment_list = (struct tile_segment *)tilebuffer;
|
nkeynes@934 | 828 | pvr2_scene.pvr2_pbuf = (uint32_t *)(pvr2_main_ram + MMIO_READ(PVR2,RENDER_POLYBASE));
|
nkeynes@863 | 829 | pvr2_scene.shadow_mode = shadow & 0x100 ? SHADOW_CHEAP : SHADOW_FULL;
|
nkeynes@863 | 830 | scene_shadow_intensity = U8TOFLOAT(shadow&0xFF);
|
nkeynes@687 | 831 |
|
nkeynes@635 | 832 | int max_tile_x = 0;
|
nkeynes@635 | 833 | int max_tile_y = 0;
|
nkeynes@635 | 834 | int obj_config = MMIO_READ( PVR2, RENDER_OBJCFG );
|
nkeynes@635 | 835 | int isp_config = MMIO_READ( PVR2, RENDER_ISPCFG );
|
nkeynes@635 | 836 |
|
nkeynes@635 | 837 | if( (obj_config & 0x00200000) == 0 ) {
|
nkeynes@687 | 838 | if( isp_config & 1 ) {
|
nkeynes@687 | 839 | pvr2_scene.sort_mode = SORT_NEVER;
|
nkeynes@687 | 840 | } else {
|
nkeynes@687 | 841 | pvr2_scene.sort_mode = SORT_ALWAYS;
|
nkeynes@687 | 842 | }
|
nkeynes@635 | 843 | } else {
|
nkeynes@687 | 844 | pvr2_scene.sort_mode = SORT_TILEFLAG;
|
nkeynes@635 | 845 | }
|
nkeynes@635 | 846 |
|
nkeynes@827 | 847 | // Pass 1: Extract polygon list
|
nkeynes@635 | 848 | uint32_t control;
|
nkeynes@635 | 849 | int i;
|
nkeynes@635 | 850 | do {
|
nkeynes@687 | 851 | control = *segment++;
|
nkeynes@687 | 852 | int tile_x = SEGMENT_X(control);
|
nkeynes@687 | 853 | int tile_y = SEGMENT_Y(control);
|
nkeynes@687 | 854 | if( tile_x > max_tile_x ) {
|
nkeynes@687 | 855 | max_tile_x = tile_x;
|
nkeynes@827 | 856 | }
|
nkeynes@687 | 857 | if( tile_y > max_tile_y ) {
|
nkeynes@687 | 858 | max_tile_y = tile_y;
|
nkeynes@687 | 859 | }
|
nkeynes@687 | 860 | for( i=0; i<5; i++ ) {
|
nkeynes@687 | 861 | if( (*segment & NO_POINTER) == 0 ) {
|
nkeynes@687 | 862 | scene_extract_polygons( *segment );
|
nkeynes@687 | 863 | }
|
nkeynes@687 | 864 | segment++;
|
nkeynes@687 | 865 | }
|
nkeynes@635 | 866 | } while( (control & SEGMENT_END) == 0 );
|
nkeynes@635 | 867 |
|
nkeynes@635 | 868 | pvr2_scene.buffer_width = (max_tile_x+1)<<5;
|
nkeynes@635 | 869 | pvr2_scene.buffer_height = (max_tile_y+1)<<5;
|
nkeynes@635 | 870 |
|
nkeynes@687 | 871 | // Pass 2: Extract vertex data
|
nkeynes@687 | 872 | vertex_buffer_map();
|
nkeynes@687 | 873 | pvr2_scene.vertex_index = 0;
|
nkeynes@687 | 874 | segment = tilebuffer;
|
nkeynes@687 | 875 | do {
|
nkeynes@687 | 876 | control = *segment++;
|
nkeynes@687 | 877 | for( i=0; i<5; i++ ) {
|
nkeynes@687 | 878 | if( (*segment & NO_POINTER) == 0 ) {
|
nkeynes@687 | 879 | scene_extract_vertexes( *segment );
|
nkeynes@687 | 880 | }
|
nkeynes@687 | 881 | segment++;
|
nkeynes@687 | 882 | }
|
nkeynes@687 | 883 | } while( (control & SEGMENT_END) == 0 );
|
nkeynes@736 | 884 |
|
nkeynes@687 | 885 | scene_extract_background();
|
nkeynes@847 | 886 | scene_compute_lut_fog();
|
nkeynes@1133 | 887 | scene_backface_cull();
|
nkeynes@736 | 888 |
|
nkeynes@687 | 889 | vertex_buffer_unmap();
|
nkeynes@635 | 890 | }
|
nkeynes@645 | 891 |
|
nkeynes@1159 | 892 | void pvr2_scene_finished( )
|
nkeynes@1159 | 893 | {
|
nkeynes@1159 | 894 | vbuf->finished(vbuf);
|
nkeynes@1159 | 895 | }
|
nkeynes@1159 | 896 |
|
nkeynes@645 | 897 | /**
|
nkeynes@645 | 898 | * Dump the current scene to file in a (mostly) human readable form
|
nkeynes@645 | 899 | */
|
nkeynes@1142 | 900 | void pvr2_scene_print( FILE *f )
|
nkeynes@645 | 901 | {
|
nkeynes@645 | 902 | int i,j;
|
nkeynes@645 | 903 |
|
nkeynes@645 | 904 | fprintf( f, "Polygons: %d\n", pvr2_scene.poly_count );
|
nkeynes@645 | 905 | for( i=0; i<pvr2_scene.poly_count; i++ ) {
|
nkeynes@736 | 906 | struct polygon_struct *poly = &pvr2_scene.poly_array[i];
|
nkeynes@1074 | 907 | fprintf( f, " %08X ", (uint32_t)(((unsigned char *)poly->context) - pvr2_main_ram) );
|
nkeynes@736 | 908 | switch( poly->vertex_count ) {
|
nkeynes@736 | 909 | case 3: fprintf( f, "Tri " ); break;
|
nkeynes@736 | 910 | case 4: fprintf( f, "Quad " ); break;
|
nkeynes@736 | 911 | default: fprintf( f,"%d-Strip ", poly->vertex_count-2 ); break;
|
nkeynes@736 | 912 | }
|
nkeynes@736 | 913 | fprintf( f, "%08X %08X %08X ", poly->context[0], poly->context[1], poly->context[2] );
|
nkeynes@736 | 914 | if( poly->mod_vertex_index != -1 ) {
|
nkeynes@736 | 915 | fprintf( f, "%08X %08X\n", poly->context[3], poly->context[5] );
|
nkeynes@736 | 916 | } else {
|
nkeynes@736 | 917 | fprintf( f, "\n" );
|
nkeynes@736 | 918 | }
|
nkeynes@736 | 919 |
|
nkeynes@736 | 920 | for( j=0; j<poly->vertex_count; j++ ) {
|
nkeynes@736 | 921 | struct vertex_struct *v = &pvr2_scene.vertex_array[poly->vertex_index+j];
|
nkeynes@784 | 922 | fprintf( f, " %.5f %.5f %.5f, (%.5f,%.5f) %.5f,%.5f,%.5f,%.5f %.5f %.5f %.5f %.5f\n", v->x, v->y, v->z, v->u, v->v,
|
nkeynes@827 | 923 | v->rgba[0], v->rgba[1], v->rgba[2], v->rgba[3],
|
nkeynes@784 | 924 | v->offset_rgba[0], v->offset_rgba[1], v->offset_rgba[2], v->offset_rgba[3] );
|
nkeynes@736 | 925 | }
|
nkeynes@736 | 926 | if( poly->mod_vertex_index != -1 ) {
|
nkeynes@736 | 927 | fprintf( f, " ---\n" );
|
nkeynes@736 | 928 | for( j=0; j<poly->vertex_count; j++ ) {
|
nkeynes@736 | 929 | struct vertex_struct *v = &pvr2_scene.vertex_array[poly->mod_vertex_index+j];
|
nkeynes@784 | 930 | fprintf( f, " %.5f %.5f %.5f, (%.5f,%.5f) %.5f,%.5f,%.5f,%.5f %.5f %.5f %.5f %.5f\n", v->x, v->y, v->z, v->u, v->v,
|
nkeynes@827 | 931 | v->rgba[0], v->rgba[1], v->rgba[2], v->rgba[3],
|
nkeynes@784 | 932 | v->offset_rgba[0], v->offset_rgba[1], v->offset_rgba[2], v->offset_rgba[3] );
|
nkeynes@736 | 933 | }
|
nkeynes@736 | 934 | }
|
nkeynes@645 | 935 | }
|
nkeynes@645 | 936 |
|
nkeynes@645 | 937 | }
|
nkeynes@1142 | 938 |
|
nkeynes@1142 | 939 | void pvr2_scene_dump()
|
nkeynes@1142 | 940 | {
|
nkeynes@1142 | 941 | pvr2_scene_print(stdout);
|
nkeynes@1142 | 942 | }
|