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 | * Where possible this uses VBOs for the vertex + index data.
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nkeynes@635 | 6 | *
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nkeynes@635 | 7 | * Copyright (c) 2005 Nathan Keynes.
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nkeynes@635 | 8 | *
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nkeynes@635 | 9 | * This program is free software; you can redistribute it and/or modify
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nkeynes@635 | 10 | * it under the terms of the GNU General Public License as published by
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nkeynes@635 | 11 | * the Free Software Foundation; either version 2 of the License, or
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nkeynes@635 | 12 | * (at your option) any later version.
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nkeynes@635 | 13 | *
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nkeynes@635 | 14 | * This program is distributed in the hope that it will be useful,
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nkeynes@635 | 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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nkeynes@635 | 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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nkeynes@635 | 17 | * GNU General Public License for more details.
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nkeynes@635 | 18 | */
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nkeynes@635 | 19 |
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nkeynes@635 | 20 | #include <assert.h>
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nkeynes@635 | 21 | #include <string.h>
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nkeynes@645 | 22 | #include <math.h>
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nkeynes@635 | 23 | #include "lxdream.h"
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nkeynes@635 | 24 | #include "display.h"
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nkeynes@635 | 25 | #include "pvr2/pvr2.h"
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nkeynes@677 | 26 | #include "pvr2/pvr2mmio.h"
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nkeynes@635 | 27 | #include "pvr2/glutil.h"
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nkeynes@635 | 28 | #include "pvr2/scene.h"
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nkeynes@635 | 29 |
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nkeynes@863 | 30 | #define U8TOFLOAT(n) (((float)((n)+1))/256.0)
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nkeynes@1155 | 31 | #define POLY_IDX(addr) ( ((uint32_t *)addr) - ((uint32_t *)pvr2_scene.pvr2_pbuf))
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nkeynes@863 | 32 |
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nkeynes@687 | 33 | static void unpack_bgra(uint32_t bgra, float *rgba)
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nkeynes@687 | 34 | {
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nkeynes@687 | 35 | rgba[0] = ((float)(((bgra&0x00FF0000)>>16) + 1)) / 256.0;
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nkeynes@687 | 36 | rgba[1] = ((float)(((bgra&0x0000FF00)>>8) + 1)) / 256.0;
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nkeynes@687 | 37 | rgba[2] = ((float)((bgra&0x000000FF) + 1)) / 256.0;
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nkeynes@687 | 38 | rgba[3] = ((float)(((bgra&0xFF000000)>>24) + 1)) / 256.0;
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nkeynes@687 | 39 | }
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nkeynes@635 | 40 |
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nkeynes@639 | 41 | static inline uint32_t bgra_to_rgba(uint32_t bgra)
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nkeynes@639 | 42 | {
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nkeynes@639 | 43 | return (bgra&0xFF00FF00) | ((bgra&0x00FF0000)>>16) | ((bgra&0x000000FF)<<16);
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nkeynes@639 | 44 | }
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nkeynes@639 | 45 |
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nkeynes@645 | 46 | /**
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nkeynes@645 | 47 | * Convert a half-float (16-bit) FP number to a regular 32-bit float.
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nkeynes@645 | 48 | * Source is 1-bit sign, 5-bit exponent, 10-bit mantissa.
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nkeynes@645 | 49 | * TODO: Check the correctness of this.
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nkeynes@645 | 50 | */
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nkeynes@645 | 51 | static float halftofloat( uint16_t half )
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nkeynes@645 | 52 | {
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nkeynes@645 | 53 | union {
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nkeynes@645 | 54 | float f;
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nkeynes@645 | 55 | uint32_t i;
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nkeynes@645 | 56 | } temp;
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nkeynes@645 | 57 | temp.i = ((uint32_t)half)<<16;
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nkeynes@645 | 58 | return temp.f;
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nkeynes@645 | 59 | }
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nkeynes@645 | 60 |
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nkeynes@847 | 61 | static float parse_fog_density( uint32_t value )
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nkeynes@847 | 62 | {
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nkeynes@847 | 63 | union {
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nkeynes@847 | 64 | uint32_t i;
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nkeynes@847 | 65 | float f;
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nkeynes@847 | 66 | } u;
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nkeynes@847 | 67 | u.i = (((value+127)&0xFF)<<23)|((value & 0xFF00)<<7);
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nkeynes@847 | 68 | return u.f;
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nkeynes@847 | 69 | }
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nkeynes@645 | 70 |
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nkeynes@635 | 71 | struct pvr2_scene_struct pvr2_scene;
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nkeynes@635 | 72 |
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nkeynes@635 | 73 | static gboolean vbo_init = FALSE;
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nkeynes@863 | 74 | static float scene_shadow_intensity = 0.0;
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nkeynes@669 | 75 |
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nkeynes@669 | 76 | #ifdef ENABLE_VERTEX_BUFFER
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nkeynes@635 | 77 | static gboolean vbo_supported = FALSE;
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nkeynes@669 | 78 | #endif
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nkeynes@635 | 79 |
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nkeynes@635 | 80 | /**
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nkeynes@635 | 81 | * Test for VBO support, and allocate all the system memory needed for the
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nkeynes@635 | 82 | * temporary structures. GL context must have been initialized before this
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nkeynes@635 | 83 | * point.
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nkeynes@635 | 84 | */
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nkeynes@635 | 85 | void pvr2_scene_init()
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nkeynes@635 | 86 | {
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nkeynes@635 | 87 | if( !vbo_init ) {
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nkeynes@645 | 88 | #ifdef ENABLE_VERTEX_BUFFER
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nkeynes@736 | 89 | if( isGLVertexBufferSupported() ) {
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nkeynes@736 | 90 | vbo_supported = TRUE;
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nkeynes@736 | 91 | pvr2_scene.vbo_id = 1;
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nkeynes@736 | 92 | }
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nkeynes@645 | 93 | #endif
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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@736 | 98 | vbo_init = TRUE;
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nkeynes@635 | 99 | }
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nkeynes@635 | 100 | }
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nkeynes@635 | 101 |
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nkeynes@639 | 102 | /**
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nkeynes@639 | 103 | * Clear the scene data structures in preparation for fresh data
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nkeynes@639 | 104 | */
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nkeynes@639 | 105 | void pvr2_scene_reset()
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nkeynes@639 | 106 | {
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nkeynes@1155 | 107 | /* Faster to just clear the active entries */
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nkeynes@1155 | 108 | for( int i=0; i<pvr2_scene.poly_count; i++ ) {
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nkeynes@1155 | 109 | pvr2_scene.buf_to_poly_map[POLY_IDX(pvr2_scene.poly_array[i].context)] = 0;
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nkeynes@1155 | 110 | }
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nkeynes@639 | 111 | pvr2_scene.poly_count = 0;
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nkeynes@639 | 112 | pvr2_scene.vertex_count = 0;
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nkeynes@639 | 113 | }
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nkeynes@639 | 114 |
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nkeynes@635 | 115 | void pvr2_scene_shutdown()
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nkeynes@635 | 116 | {
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nkeynes@645 | 117 | #ifdef ENABLE_VERTEX_BUFFER
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nkeynes@635 | 118 | if( vbo_supported ) {
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nkeynes@736 | 119 | glBindBufferARB( GL_ARRAY_BUFFER_ARB, 0 );
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nkeynes@736 | 120 | glDeleteBuffersARB( 1, &pvr2_scene.vbo_id );
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nkeynes@736 | 121 | pvr2_scene.vbo_id = 0;
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nkeynes@635 | 122 | } else {
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nkeynes@645 | 123 | #endif
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nkeynes@736 | 124 | g_free( pvr2_scene.vertex_array );
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nkeynes@736 | 125 | pvr2_scene.vertex_array = NULL;
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nkeynes@645 | 126 | #ifdef ENABLE_VERTEX_BUFFER
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nkeynes@635 | 127 | }
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nkeynes@645 | 128 | #endif
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nkeynes@645 | 129 |
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nkeynes@635 | 130 | g_free( pvr2_scene.poly_array );
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nkeynes@645 | 131 | pvr2_scene.poly_array = NULL;
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nkeynes@635 | 132 | g_free( pvr2_scene.buf_to_poly_map );
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nkeynes@645 | 133 | pvr2_scene.buf_to_poly_map = NULL;
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nkeynes@635 | 134 | vbo_init = FALSE;
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nkeynes@635 | 135 | }
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nkeynes@635 | 136 |
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nkeynes@635 | 137 | void *vertex_buffer_map()
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nkeynes@635 | 138 | {
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nkeynes@687 | 139 | // Allow 8 vertexes for the background (4+4)
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nkeynes@687 | 140 | uint32_t size = (pvr2_scene.vertex_count + 8) * sizeof(struct vertex_struct);
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nkeynes@645 | 141 | #ifdef ENABLE_VERTEX_BUFFER
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nkeynes@635 | 142 | if( vbo_supported ) {
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nkeynes@690 | 143 | glGetError();
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nkeynes@736 | 144 | glBindBufferARB( GL_ARRAY_BUFFER_ARB, pvr2_scene.vbo_id );
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nkeynes@736 | 145 | if( size > pvr2_scene.vertex_array_size ) {
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nkeynes@736 | 146 | glBufferDataARB( GL_ARRAY_BUFFER_ARB, size, NULL, GL_DYNAMIC_DRAW_ARB );
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nkeynes@736 | 147 | int status = glGetError();
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nkeynes@736 | 148 | if( status != 0 ) {
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nkeynes@736 | 149 | fprintf( stderr, "Error %08X allocating vertex buffer\n", status );
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nkeynes@736 | 150 | abort();
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nkeynes@736 | 151 | }
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nkeynes@736 | 152 | pvr2_scene.vertex_array_size = size;
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nkeynes@736 | 153 | }
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nkeynes@736 | 154 | pvr2_scene.vertex_array = glMapBufferARB( GL_ARRAY_BUFFER_ARB, GL_WRITE_ONLY_ARB );
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nkeynes@736 | 155 | assert(pvr2_scene.vertex_array != NULL );
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nkeynes@635 | 156 | } else {
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nkeynes@645 | 157 | #endif
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nkeynes@736 | 158 | if( size > pvr2_scene.vertex_array_size ) {
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nkeynes@736 | 159 | pvr2_scene.vertex_array = g_realloc( pvr2_scene.vertex_array, size );
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nkeynes@736 | 160 | }
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nkeynes@645 | 161 | #ifdef ENABLE_VERTEX_BUFFER
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nkeynes@635 | 162 | }
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nkeynes@645 | 163 | #endif
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nkeynes@635 | 164 | return pvr2_scene.vertex_array;
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nkeynes@635 | 165 | }
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nkeynes@635 | 166 |
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nkeynes@635 | 167 | gboolean vertex_buffer_unmap()
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nkeynes@635 | 168 | {
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nkeynes@645 | 169 | #ifdef ENABLE_VERTEX_BUFFER
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nkeynes@635 | 170 | if( vbo_supported ) {
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nkeynes@736 | 171 | pvr2_scene.vertex_array = NULL;
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nkeynes@736 | 172 | return glUnmapBufferARB( GL_ARRAY_BUFFER_ARB );
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nkeynes@635 | 173 | } else {
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nkeynes@736 | 174 | return TRUE;
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nkeynes@635 | 175 | }
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nkeynes@645 | 176 | #else
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nkeynes@645 | 177 | return TRUE;
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nkeynes@645 | 178 | #endif
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nkeynes@635 | 179 | }
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nkeynes@635 | 180 |
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nkeynes@639 | 181 | static struct polygon_struct *scene_add_polygon( pvraddr_t poly_idx, int vertex_count,
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nkeynes@863 | 182 | shadow_mode_t is_modified )
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nkeynes@635 | 183 | {
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nkeynes@863 | 184 | int vert_mul = is_modified != SHADOW_NONE ? 2 : 1;
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nkeynes@635 | 185 |
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nkeynes@635 | 186 | if( pvr2_scene.buf_to_poly_map[poly_idx] != NULL ) {
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nkeynes@687 | 187 | if( vertex_count > pvr2_scene.buf_to_poly_map[poly_idx]->vertex_count ) {
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nkeynes@687 | 188 | pvr2_scene.vertex_count += (vertex_count - pvr2_scene.buf_to_poly_map[poly_idx]->vertex_count) * vert_mul;
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nkeynes@687 | 189 | pvr2_scene.buf_to_poly_map[poly_idx]->vertex_count = vertex_count;
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nkeynes@687 | 190 | }
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nkeynes@687 | 191 | return pvr2_scene.buf_to_poly_map[poly_idx];
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nkeynes@635 | 192 | } else {
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nkeynes@687 | 193 | struct polygon_struct *poly = &pvr2_scene.poly_array[pvr2_scene.poly_count++];
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nkeynes@687 | 194 | poly->context = &pvr2_scene.pvr2_pbuf[poly_idx];
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nkeynes@687 | 195 | poly->vertex_count = vertex_count;
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nkeynes@687 | 196 | poly->vertex_index = -1;
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nkeynes@687 | 197 | poly->mod_vertex_index = -1;
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nkeynes@687 | 198 | poly->next = NULL;
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nkeynes@1133 | 199 | poly->sub_next = NULL;
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nkeynes@687 | 200 | pvr2_scene.buf_to_poly_map[poly_idx] = poly;
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nkeynes@687 | 201 | pvr2_scene.vertex_count += (vertex_count * vert_mul);
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nkeynes@687 | 202 | return poly;
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nkeynes@635 | 203 | }
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nkeynes@635 | 204 | }
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nkeynes@635 | 205 |
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nkeynes@635 | 206 | /**
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nkeynes@1133 | 207 | * Given a starting polygon, break it at the specified triangle so that the
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nkeynes@1133 | 208 | * preceding triangles are retained, and the remainder are contained in a
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nkeynes@1133 | 209 | * new sub-polygon. Does not preserve winding.
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nkeynes@1133 | 210 | */
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nkeynes@1133 | 211 | static struct polygon_struct *scene_split_subpolygon( struct polygon_struct *parent, int split_offset )
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nkeynes@1133 | 212 | {
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nkeynes@1133 | 213 | assert( split_offset > 0 && split_offset < (parent->vertex_count-2) );
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nkeynes@1133 | 214 | assert( pvr2_scene.poly_count < MAX_POLYGONS );
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nkeynes@1133 | 215 | struct polygon_struct *poly = &pvr2_scene.poly_array[pvr2_scene.poly_count++];
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nkeynes@1133 | 216 | poly->vertex_count = parent->vertex_count - split_offset;
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nkeynes@1133 | 217 | poly->vertex_index = parent->vertex_index + split_offset;
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nkeynes@1133 | 218 | if( parent->mod_vertex_index == -1 ) {
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nkeynes@1133 | 219 | poly->mod_vertex_index = -1;
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nkeynes@1133 | 220 | } else {
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nkeynes@1133 | 221 | poly->mod_vertex_index = parent->mod_vertex_index + split_offset;
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nkeynes@1133 | 222 | }
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nkeynes@1133 | 223 | poly->context = parent->context;
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nkeynes@1133 | 224 | poly->next = NULL;
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nkeynes@1133 | 225 | poly->sub_next = parent->sub_next;
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nkeynes@1133 | 226 |
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nkeynes@1133 | 227 | parent->sub_next = poly;
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nkeynes@1133 | 228 | parent->vertex_count = split_offset + 2;
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nkeynes@1133 | 229 |
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nkeynes@1133 | 230 | return poly;
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nkeynes@1133 | 231 | }
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nkeynes@1133 | 232 |
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nkeynes@1140 | 233 | static float scene_get_palette_offset( uint32_t tex )
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nkeynes@1140 | 234 | {
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nkeynes@1140 | 235 | uint32_t fmt = (tex & PVR2_TEX_FORMAT_MASK);
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nkeynes@1140 | 236 | if( fmt == PVR2_TEX_FORMAT_IDX4 ) {
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nkeynes@1140 | 237 | return ((float)((tex & 0x07E00000) >> 17))/1024.0 + 0.0002;
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nkeynes@1140 | 238 | } else if( fmt == PVR2_TEX_FORMAT_IDX8 ) {
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nkeynes@1140 | 239 | return ((float)((tex & 0x06000000) >> 17))/1024.0 + 0.0002;
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nkeynes@1140 | 240 | } else {
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nkeynes@1140 | 241 | return -1.0;
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nkeynes@1140 | 242 | }
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nkeynes@1140 | 243 | }
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nkeynes@1140 | 244 |
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nkeynes@1133 | 245 | /**
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nkeynes@635 | 246 | * Decode a single PVR2 renderable vertex (opaque/trans/punch-out, but not shadow
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nkeynes@635 | 247 | * volume)
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nkeynes@635 | 248 | * @param vert Pointer to output vertex structure
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nkeynes@635 | 249 | * @param poly1 First word of polygon context (needed to understand vertex)
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nkeynes@639 | 250 | * @param poly2 Second word of polygon context
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nkeynes@635 | 251 | * @param pvr2_data Pointer to raw pvr2 vertex data (in VRAM)
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nkeynes@635 | 252 | * @param modify_offset Offset in 32-bit words to the tex/color data. 0 for
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nkeynes@635 | 253 | * the normal vertex, half the vertex length for the modified vertex.
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nkeynes@635 | 254 | */
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nkeynes@827 | 255 | static void pvr2_decode_render_vertex( struct vertex_struct *vert, uint32_t poly1,
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nkeynes@1140 | 256 | uint32_t poly2, uint32_t tex, uint32_t *pvr2_data,
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nkeynes@736 | 257 | int modify_offset )
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nkeynes@635 | 258 | {
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nkeynes@639 | 259 | gboolean force_alpha = !POLY2_ALPHA_ENABLE(poly2);
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nkeynes@635 | 260 | union pvr2_data_type {
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nkeynes@687 | 261 | uint32_t *ival;
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nkeynes@687 | 262 | float *fval;
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nkeynes@635 | 263 | } data;
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nkeynes@635 | 264 |
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nkeynes@635 | 265 | data.ival = pvr2_data;
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nkeynes@687 | 266 |
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nkeynes@635 | 267 | vert->x = *data.fval++;
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nkeynes@635 | 268 | vert->y = *data.fval++;
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nkeynes@635 | 269 |
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nkeynes@635 | 270 | float z = *data.fval++;
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nkeynes@645 | 271 | if( !isfinite(z) ) {
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nkeynes@687 | 272 | z = 0;
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nkeynes@648 | 273 | } else if( z != 0 ) {
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nkeynes@687 | 274 | z = 1/z;
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nkeynes@645 | 275 | }
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nkeynes@635 | 276 | if( z > pvr2_scene.bounds[5] ) {
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nkeynes@687 | 277 | pvr2_scene.bounds[5] = z;
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nkeynes@635 | 278 | } else if( z < pvr2_scene.bounds[4] && z != 0 ) {
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nkeynes@687 | 279 | pvr2_scene.bounds[4] = z;
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nkeynes@635 | 280 | }
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nkeynes@635 | 281 | vert->z = z;
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nkeynes@635 | 282 | data.ival += modify_offset;
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nkeynes@635 | 283 |
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nkeynes@687 | 284 |
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nkeynes@635 | 285 | if( POLY1_TEXTURED(poly1) ) {
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nkeynes@687 | 286 | if( POLY1_UV16(poly1) ) {
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nkeynes@687 | 287 | vert->u = halftofloat( *data.ival>>16 );
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nkeynes@687 | 288 | vert->v = halftofloat( *data.ival );
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nkeynes@687 | 289 | data.ival++;
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nkeynes@687 | 290 | } else {
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nkeynes@687 | 291 | vert->u = *data.fval++;
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nkeynes@687 | 292 | vert->v = *data.fval++;
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nkeynes@687 | 293 | }
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nkeynes@1139 | 294 |
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nkeynes@1139 | 295 | switch( POLY2_TEX_BLEND(poly2) ) {
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nkeynes@1139 | 296 | case 0:/* Convert replace => modulate by setting colour values to 1.0 */
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nkeynes@1139 | 297 | vert->rgba[0] = vert->rgba[1] = vert->rgba[2] = vert->rgba[3] = 1.0;
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nkeynes@1140 | 298 | vert->tex_mode = 0.0;
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nkeynes@1139 | 299 | data.ival++; /* Skip the colour word */
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nkeynes@1139 | 300 | break;
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nkeynes@1140 | 301 | case 2: /* Decal */
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nkeynes@1140 | 302 | vert->tex_mode = 1.0;
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nkeynes@1140 | 303 | unpack_bgra(*data.ival++, vert->rgba);
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nkeynes@1140 | 304 | break;
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nkeynes@1139 | 305 | case 1:
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nkeynes@687 | 306 | force_alpha = TRUE;
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nkeynes@1139 | 307 | /* fall-through */
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nkeynes@1140 | 308 | default:
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nkeynes@1140 | 309 | vert->tex_mode = 0.0;
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nkeynes@1139 | 310 | unpack_bgra(*data.ival++, vert->rgba);
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nkeynes@1139 | 311 | break;
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nkeynes@687 | 312 | }
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nkeynes@1140 | 313 | vert->r = scene_get_palette_offset(tex);
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nkeynes@1139 | 314 | } else {
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nkeynes@1140 | 315 | vert->tex_mode = 2.0;
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nkeynes@1140 | 316 | vert->r = -1.0;
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nkeynes@1139 | 317 | unpack_bgra(*data.ival++, vert->rgba);
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nkeynes@635 | 318 | }
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nkeynes@1139 | 319 |
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nkeynes@687 | 320 | if( POLY1_SPECULAR(poly1) ) {
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nkeynes@687 | 321 | unpack_bgra(*data.ival++, vert->offset_rgba);
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nkeynes@687 | 322 | } else {
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nkeynes@687 | 323 | vert->offset_rgba[0] = 0.0;
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nkeynes@687 | 324 | vert->offset_rgba[1] = 0.0;
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nkeynes@687 | 325 | vert->offset_rgba[2] = 0.0;
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nkeynes@827 | 326 | vert->offset_rgba[3] = 0.0;
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nkeynes@687 | 327 | }
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nkeynes@687 | 328 |
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nkeynes@639 | 329 | if( force_alpha ) {
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nkeynes@687 | 330 | vert->rgba[3] = 1.0;
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nkeynes@635 | 331 | }
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nkeynes@635 | 332 | }
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nkeynes@635 | 333 |
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nkeynes@635 | 334 | /**
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nkeynes@687 | 335 | * Compute texture, colour, and z values for 1 or more result points by interpolating from
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nkeynes@687 | 336 | * a set of 3 input points. The result point(s) must define their x,y.
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nkeynes@635 | 337 | */
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nkeynes@827 | 338 | static void scene_compute_vertexes( struct vertex_struct *result,
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nkeynes@687 | 339 | int result_count,
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nkeynes@736 | 340 | struct vertex_struct *input,
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nkeynes@736 | 341 | gboolean is_solid_shaded )
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nkeynes@635 | 342 | {
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nkeynes@687 | 343 | int i,j;
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nkeynes@635 | 344 | float sx = input[2].x - input[1].x;
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nkeynes@635 | 345 | float sy = input[2].y - input[1].y;
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nkeynes@635 | 346 | float tx = input[0].x - input[1].x;
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nkeynes@635 | 347 | float ty = input[0].y - input[1].y;
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nkeynes@635 | 348 |
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nkeynes@635 | 349 | float detxy = ((sy) * (tx)) - ((ty) * (sx));
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nkeynes@635 | 350 | if( detxy == 0 ) {
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nkeynes@827 | 351 | // If the input points fall on a line, they don't define a usable
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nkeynes@687 | 352 | // polygon - the PVR2 takes the last input point as the result in
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nkeynes@687 | 353 | // this case.
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nkeynes@687 | 354 | for( i=0; i<result_count; i++ ) {
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nkeynes@687 | 355 | float x = result[i].x;
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nkeynes@687 | 356 | float y = result[i].y;
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nkeynes@687 | 357 | memcpy( &result[i], &input[2], sizeof(struct vertex_struct) );
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nkeynes@687 | 358 | result[i].x = x;
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nkeynes@687 | 359 | result[i].y = y;
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nkeynes@687 | 360 | }
|
nkeynes@687 | 361 | return;
|
nkeynes@635 | 362 | }
|
nkeynes@635 | 363 | float sz = input[2].z - input[1].z;
|
nkeynes@635 | 364 | float tz = input[0].z - input[1].z;
|
nkeynes@635 | 365 | float su = input[2].u - input[1].u;
|
nkeynes@635 | 366 | float tu = input[0].u - input[1].u;
|
nkeynes@635 | 367 | float sv = input[2].v - input[1].v;
|
nkeynes@635 | 368 | float tv = input[0].v - input[1].v;
|
nkeynes@635 | 369 |
|
nkeynes@687 | 370 | for( i=0; i<result_count; i++ ) {
|
nkeynes@687 | 371 | float t = ((result[i].x - input[1].x) * sy -
|
nkeynes@687 | 372 | (result[i].y - input[1].y) * sx) / detxy;
|
nkeynes@687 | 373 | float s = ((result[i].y - input[1].y) * tx -
|
nkeynes@687 | 374 | (result[i].x - input[1].x) * ty) / detxy;
|
nkeynes@687 | 375 |
|
nkeynes@687 | 376 | float rz = input[1].z + (t*tz) + (s*sz);
|
nkeynes@687 | 377 | if( rz > pvr2_scene.bounds[5] ) {
|
nkeynes@687 | 378 | pvr2_scene.bounds[5] = rz;
|
nkeynes@687 | 379 | } else if( rz < pvr2_scene.bounds[4] ) {
|
nkeynes@827 | 380 | pvr2_scene.bounds[4] = rz;
|
nkeynes@687 | 381 | }
|
nkeynes@687 | 382 | result[i].z = rz;
|
nkeynes@687 | 383 | result[i].u = input[1].u + (t*tu) + (s*su);
|
nkeynes@687 | 384 | result[i].v = input[1].v + (t*tv) + (s*sv);
|
nkeynes@1140 | 385 | result[i].r = input[1].r; /* Last two components are flat */
|
nkeynes@1140 | 386 | result[i].tex_mode = input[1].tex_mode;
|
nkeynes@687 | 387 |
|
nkeynes@687 | 388 | if( is_solid_shaded ) {
|
nkeynes@687 | 389 | memcpy( result->rgba, input[2].rgba, sizeof(result->rgba) );
|
nkeynes@687 | 390 | memcpy( result->offset_rgba, input[2].offset_rgba, sizeof(result->offset_rgba) );
|
nkeynes@687 | 391 | } else {
|
nkeynes@687 | 392 | float *rgba0 = input[0].rgba;
|
nkeynes@687 | 393 | float *rgba1 = input[1].rgba;
|
nkeynes@687 | 394 | float *rgba2 = input[2].rgba;
|
nkeynes@687 | 395 | float *rgba3 = result[i].rgba;
|
nkeynes@687 | 396 | for( j=0; j<8; j++ ) {
|
nkeynes@687 | 397 | float tc = *rgba0++ - *rgba1;
|
nkeynes@687 | 398 | float sc = *rgba2++ - *rgba1;
|
nkeynes@687 | 399 | float rc = *rgba1++ + (t*tc) + (s*sc);
|
nkeynes@687 | 400 | *rgba3++ = rc;
|
nkeynes@687 | 401 | }
|
nkeynes@687 | 402 | }
|
nkeynes@635 | 403 | }
|
nkeynes@653 | 404 | }
|
nkeynes@635 | 405 |
|
nkeynes@847 | 406 | static float scene_compute_lut_fog_vertex( float z, float fog_density, float fog_table[][2] )
|
nkeynes@847 | 407 | {
|
nkeynes@847 | 408 | union {
|
nkeynes@847 | 409 | uint32_t i;
|
nkeynes@847 | 410 | float f;
|
nkeynes@847 | 411 | } v;
|
nkeynes@847 | 412 | v.f = z * fog_density;
|
nkeynes@847 | 413 | if( v.f < 1.0 ) v.f = 1.0;
|
nkeynes@847 | 414 | else if( v.f > 255.9999 ) v.f = 255.9999;
|
nkeynes@847 | 415 |
|
nkeynes@847 | 416 | uint32_t index = ((v.i >> 18) & 0x0F)|((v.i>>19)&0x70);
|
nkeynes@847 | 417 | return fog_table[index][0];
|
nkeynes@847 | 418 | }
|
nkeynes@847 | 419 |
|
nkeynes@847 | 420 | /**
|
nkeynes@847 | 421 | * Compute the fog coefficients for all polygons using lookup-table fog. It's
|
nkeynes@847 | 422 | * a little more convenient to do this as a separate pass, since we don't have
|
nkeynes@847 | 423 | * to worry about computed vertexes.
|
nkeynes@847 | 424 | */
|
nkeynes@847 | 425 | static void scene_compute_lut_fog( )
|
nkeynes@847 | 426 | {
|
nkeynes@847 | 427 | int i,j;
|
nkeynes@847 | 428 |
|
nkeynes@847 | 429 | float fog_density = parse_fog_density(MMIO_READ( PVR2, RENDER_FOGCOEFF ));
|
nkeynes@847 | 430 | float fog_table[128][2];
|
nkeynes@847 | 431 |
|
nkeynes@847 | 432 | /* Parse fog table out into floating-point format */
|
nkeynes@847 | 433 | for( i=0; i<128; i++ ) {
|
nkeynes@847 | 434 | uint32_t ent = MMIO_READ( PVR2, RENDER_FOGTABLE + (i<<2) );
|
nkeynes@847 | 435 | fog_table[i][0] = ((float)(((ent&0x0000FF00)>>8) + 1)) / 256.0;
|
nkeynes@847 | 436 | fog_table[i][1] = ((float)((ent&0x000000FF) + 1)) / 256.0;
|
nkeynes@847 | 437 | }
|
nkeynes@847 | 438 |
|
nkeynes@847 | 439 |
|
nkeynes@847 | 440 | for( i=0; i<pvr2_scene.poly_count; i++ ) {
|
nkeynes@847 | 441 | int mode = POLY2_FOG_MODE(pvr2_scene.poly_array[i].context[1]);
|
nkeynes@1132 | 442 | uint32_t index = pvr2_scene.poly_array[i].vertex_index;
|
nkeynes@847 | 443 | if( mode == PVR2_POLY_FOG_LOOKUP ) {
|
nkeynes@1132 | 444 | for( j=0; j<pvr2_scene.poly_array[i].vertex_count; j++ ) {
|
nkeynes@847 | 445 | pvr2_scene.vertex_array[index+j].offset_rgba[3] =
|
nkeynes@847 | 446 | scene_compute_lut_fog_vertex( pvr2_scene.vertex_array[index+j].z, fog_density, fog_table );
|
nkeynes@847 | 447 | }
|
nkeynes@847 | 448 | } else if( mode == PVR2_POLY_FOG_LOOKUP2 ) {
|
nkeynes@1132 | 449 | for( j=0; j<pvr2_scene.poly_array[i].vertex_count; j++ ) {
|
nkeynes@847 | 450 | pvr2_scene.vertex_array[index+j].rgba[0] = pvr2_scene.fog_lut_colour[0];
|
nkeynes@847 | 451 | pvr2_scene.vertex_array[index+j].rgba[1] = pvr2_scene.fog_lut_colour[1];
|
nkeynes@847 | 452 | pvr2_scene.vertex_array[index+j].rgba[2] = pvr2_scene.fog_lut_colour[2];
|
nkeynes@847 | 453 | pvr2_scene.vertex_array[index+j].rgba[3] =
|
nkeynes@847 | 454 | scene_compute_lut_fog_vertex( pvr2_scene.vertex_array[index+j].z, fog_density, fog_table );
|
nkeynes@1132 | 455 | pvr2_scene.vertex_array[index+j].offset_rgba[3] = 0;
|
nkeynes@1132 | 456 | }
|
nkeynes@1132 | 457 | } else if( mode == PVR2_POLY_FOG_DISABLED ) {
|
nkeynes@1132 | 458 | for( j=0; j<pvr2_scene.poly_array[i].vertex_count; j++ ) {
|
nkeynes@1132 | 459 | pvr2_scene.vertex_array[index+j].offset_rgba[3] = 0;
|
nkeynes@847 | 460 | }
|
nkeynes@847 | 461 | }
|
nkeynes@635 | 462 | }
|
nkeynes@847 | 463 | }
|
nkeynes@635 | 464 |
|
nkeynes@1133 | 465 | /**
|
nkeynes@1133 | 466 | * Manually cull back-facing polygons where we can - this actually saves
|
nkeynes@1133 | 467 | * us a lot of time vs passing everything to GL to do it.
|
nkeynes@1133 | 468 | */
|
nkeynes@1133 | 469 | static void scene_backface_cull()
|
nkeynes@1133 | 470 | {
|
nkeynes@1133 | 471 | unsigned poly_idx;
|
nkeynes@1133 | 472 | unsigned poly_count = pvr2_scene.poly_count; /* Note: we don't want to process any sub-polygons created here */
|
nkeynes@1133 | 473 | for( poly_idx = 0; poly_idx<poly_count; poly_idx++ ) {
|
nkeynes@1133 | 474 | uint32_t poly1 = pvr2_scene.poly_array[poly_idx].context[0];
|
nkeynes@1133 | 475 | if( POLY1_CULL_ENABLE(poly1) ) {
|
nkeynes@1133 | 476 | struct polygon_struct *poly = &pvr2_scene.poly_array[poly_idx];
|
nkeynes@1133 | 477 | unsigned vert_idx = poly->vertex_index;
|
nkeynes@1133 | 478 | unsigned tri_count = poly->vertex_count-2;
|
nkeynes@1133 | 479 | struct vertex_struct *vert = &pvr2_scene.vertex_array[vert_idx];
|
nkeynes@1133 | 480 | unsigned i;
|
nkeynes@1133 | 481 | gboolean ccw = (POLY1_CULL_MODE(poly1) == CULL_CCW);
|
nkeynes@1133 | 482 | int first_visible = -1, last_visible = -1;
|
nkeynes@1133 | 483 | for( i=0; i<tri_count; i++ ) {
|
nkeynes@1133 | 484 | float ux = vert[i+1].x - vert[i].x;
|
nkeynes@1133 | 485 | float uy = vert[i+1].y - vert[i].y;
|
nkeynes@1133 | 486 | float vx = vert[i+2].x - vert[i].x;
|
nkeynes@1133 | 487 | float vy = vert[i+2].y - vert[i].y;
|
nkeynes@1133 | 488 | float nz = (ux*vy) - (uy*vx);
|
nkeynes@1133 | 489 | if( ccw ? nz > 0 : nz < 0 ) {
|
nkeynes@1133 | 490 | /* Surface is visible */
|
nkeynes@1133 | 491 | if( first_visible == -1 ) {
|
nkeynes@1133 | 492 | first_visible = i;
|
nkeynes@1133 | 493 | /* Elide the initial hidden triangles (note we don't
|
nkeynes@1133 | 494 | * need to care about winding anymore here) */
|
nkeynes@1133 | 495 | poly->vertex_index += i;
|
nkeynes@1133 | 496 | poly->vertex_count -= i;
|
nkeynes@1133 | 497 | if( poly->mod_vertex_index != -1 )
|
nkeynes@1133 | 498 | poly->mod_vertex_index += i;
|
nkeynes@1133 | 499 | } else if( last_visible != i-1 ) {
|
nkeynes@1133 | 500 | /* And... here we have to split the polygon. Allocate a new
|
nkeynes@1133 | 501 | * sub-polygon to hold the vertex references */
|
nkeynes@1133 | 502 | struct polygon_struct *sub = scene_split_subpolygon(poly, (i-first_visible));
|
nkeynes@1133 | 503 | poly->vertex_count -= (i-first_visible-1) - last_visible;
|
nkeynes@1133 | 504 | first_visible = i;
|
nkeynes@1133 | 505 | poly = sub;
|
nkeynes@1133 | 506 | }
|
nkeynes@1133 | 507 | last_visible = i;
|
nkeynes@1133 | 508 | } /* Else culled */
|
nkeynes@1133 | 509 | /* Invert ccw flag for triangle strip processing */
|
nkeynes@1133 | 510 | ccw = !ccw;
|
nkeynes@1133 | 511 | }
|
nkeynes@1133 | 512 | if( last_visible == -1 ) {
|
nkeynes@1133 | 513 | /* No visible surfaces, so we can mark the whole polygon as being vertex-less */
|
nkeynes@1133 | 514 | poly->vertex_count = 0;
|
nkeynes@1133 | 515 | } else if( last_visible != tri_count-1 ) {
|
nkeynes@1133 | 516 | /* Remove final hidden tris */
|
nkeynes@1133 | 517 | poly->vertex_count -= (tri_count - 1 - last_visible);
|
nkeynes@1133 | 518 | }
|
nkeynes@1133 | 519 | }
|
nkeynes@1133 | 520 | }
|
nkeynes@1133 | 521 | }
|
nkeynes@1133 | 522 |
|
nkeynes@863 | 523 | static void scene_add_cheap_shadow_vertexes( struct vertex_struct *src, struct vertex_struct *dest, int count )
|
nkeynes@863 | 524 | {
|
nkeynes@863 | 525 | unsigned int i, j;
|
nkeynes@863 | 526 |
|
nkeynes@863 | 527 | for( i=0; i<count; i++ ) {
|
nkeynes@863 | 528 | dest->x = src->x;
|
nkeynes@863 | 529 | dest->y = src->y;
|
nkeynes@863 | 530 | dest->z = src->z;
|
nkeynes@863 | 531 | dest->u = src->u;
|
nkeynes@863 | 532 | dest->v = src->v;
|
nkeynes@1140 | 533 | dest->r = src->r;
|
nkeynes@1140 | 534 | dest->tex_mode = src->tex_mode;
|
nkeynes@863 | 535 | dest->rgba[0] = src->rgba[0] * scene_shadow_intensity;
|
nkeynes@863 | 536 | dest->rgba[1] = src->rgba[1] * scene_shadow_intensity;
|
nkeynes@863 | 537 | dest->rgba[2] = src->rgba[2] * scene_shadow_intensity;
|
nkeynes@863 | 538 | dest->rgba[3] = src->rgba[3] * scene_shadow_intensity;
|
nkeynes@863 | 539 | dest->offset_rgba[0] = src->offset_rgba[0] * scene_shadow_intensity;
|
nkeynes@863 | 540 | dest->offset_rgba[1] = src->offset_rgba[1] * scene_shadow_intensity;
|
nkeynes@863 | 541 | dest->offset_rgba[2] = src->offset_rgba[2] * scene_shadow_intensity;
|
nkeynes@863 | 542 | dest->offset_rgba[3] = src->offset_rgba[3];
|
nkeynes@863 | 543 | dest++;
|
nkeynes@863 | 544 | src++;
|
nkeynes@863 | 545 | }
|
nkeynes@635 | 546 | }
|
nkeynes@635 | 547 |
|
nkeynes@639 | 548 | static void scene_add_vertexes( pvraddr_t poly_idx, int vertex_length,
|
nkeynes@863 | 549 | shadow_mode_t is_modified )
|
nkeynes@635 | 550 | {
|
nkeynes@635 | 551 | struct polygon_struct *poly = pvr2_scene.buf_to_poly_map[poly_idx];
|
nkeynes@635 | 552 | uint32_t *ptr = &pvr2_scene.pvr2_pbuf[poly_idx];
|
nkeynes@635 | 553 | uint32_t *context = ptr;
|
nkeynes@635 | 554 | unsigned int i;
|
nkeynes@635 | 555 |
|
nkeynes@635 | 556 | if( poly->vertex_index == -1 ) {
|
nkeynes@863 | 557 | ptr += (is_modified == SHADOW_FULL ? 5 : 3 );
|
nkeynes@687 | 558 | poly->vertex_index = pvr2_scene.vertex_index;
|
nkeynes@687 | 559 |
|
nkeynes@687 | 560 | assert( poly != NULL );
|
nkeynes@687 | 561 | assert( pvr2_scene.vertex_index + poly->vertex_count <= pvr2_scene.vertex_count );
|
nkeynes@687 | 562 | for( i=0; i<poly->vertex_count; i++ ) {
|
nkeynes@1140 | 563 | pvr2_decode_render_vertex( &pvr2_scene.vertex_array[pvr2_scene.vertex_index++], context[0], context[1], context[2], ptr, 0 );
|
nkeynes@687 | 564 | ptr += vertex_length;
|
nkeynes@687 | 565 | }
|
nkeynes@687 | 566 | if( is_modified ) {
|
nkeynes@687 | 567 | assert( pvr2_scene.vertex_index + poly->vertex_count <= pvr2_scene.vertex_count );
|
nkeynes@687 | 568 | poly->mod_vertex_index = pvr2_scene.vertex_index;
|
nkeynes@863 | 569 | if( is_modified == SHADOW_FULL ) {
|
nkeynes@863 | 570 | int mod_offset = (vertex_length - 3)>>1;
|
nkeynes@863 | 571 | ptr = &pvr2_scene.pvr2_pbuf[poly_idx] + 5;
|
nkeynes@863 | 572 | for( i=0; i<poly->vertex_count; i++ ) {
|
nkeynes@1140 | 573 | pvr2_decode_render_vertex( &pvr2_scene.vertex_array[pvr2_scene.vertex_index++], context[0], context[3], context[4], ptr, mod_offset );
|
nkeynes@863 | 574 | ptr += vertex_length;
|
nkeynes@863 | 575 | }
|
nkeynes@863 | 576 | } else {
|
nkeynes@863 | 577 | scene_add_cheap_shadow_vertexes( &pvr2_scene.vertex_array[poly->vertex_index],
|
nkeynes@863 | 578 | &pvr2_scene.vertex_array[poly->mod_vertex_index], poly->vertex_count );
|
nkeynes@863 | 579 | pvr2_scene.vertex_index += poly->vertex_count;
|
nkeynes@687 | 580 | }
|
nkeynes@687 | 581 | }
|
nkeynes@635 | 582 | }
|
nkeynes@635 | 583 | }
|
nkeynes@635 | 584 |
|
nkeynes@827 | 585 | static void scene_add_quad_vertexes( pvraddr_t poly_idx, int vertex_length,
|
nkeynes@863 | 586 | shadow_mode_t is_modified )
|
nkeynes@635 | 587 | {
|
nkeynes@635 | 588 | struct polygon_struct *poly = pvr2_scene.buf_to_poly_map[poly_idx];
|
nkeynes@635 | 589 | uint32_t *ptr = &pvr2_scene.pvr2_pbuf[poly_idx];
|
nkeynes@635 | 590 | uint32_t *context = ptr;
|
nkeynes@635 | 591 | unsigned int i;
|
nkeynes@635 | 592 |
|
nkeynes@635 | 593 | if( poly->vertex_index == -1 ) {
|
nkeynes@827 | 594 | // Construct it locally and copy to the vertex buffer, as the VBO is
|
nkeynes@736 | 595 | // allowed to be horribly slow for reads (ie it could be direct-mapped
|
nkeynes@736 | 596 | // vram).
|
nkeynes@736 | 597 | struct vertex_struct quad[4];
|
nkeynes@736 | 598 |
|
nkeynes@736 | 599 | assert( poly != NULL );
|
nkeynes@736 | 600 | assert( pvr2_scene.vertex_index + poly->vertex_count <= pvr2_scene.vertex_count );
|
nkeynes@863 | 601 | ptr += (is_modified == SHADOW_FULL ? 5 : 3 );
|
nkeynes@736 | 602 | poly->vertex_index = pvr2_scene.vertex_index;
|
nkeynes@736 | 603 | for( i=0; i<4; i++ ) {
|
nkeynes@1140 | 604 | pvr2_decode_render_vertex( &quad[i], context[0], context[1], context[2], ptr, 0 );
|
nkeynes@736 | 605 | ptr += vertex_length;
|
nkeynes@736 | 606 | }
|
nkeynes@687 | 607 | scene_compute_vertexes( &quad[3], 1, &quad[0], !POLY1_GOURAUD_SHADED(context[0]) );
|
nkeynes@736 | 608 | // Swap last two vertexes (quad arrangement => tri strip arrangement)
|
nkeynes@736 | 609 | memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index], quad, sizeof(struct vertex_struct)*2 );
|
nkeynes@736 | 610 | memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index+2], &quad[3], sizeof(struct vertex_struct) );
|
nkeynes@736 | 611 | memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index+3], &quad[2], sizeof(struct vertex_struct) );
|
nkeynes@736 | 612 | pvr2_scene.vertex_index += 4;
|
nkeynes@736 | 613 |
|
nkeynes@736 | 614 | if( is_modified ) {
|
nkeynes@736 | 615 | assert( pvr2_scene.vertex_index + poly->vertex_count <= pvr2_scene.vertex_count );
|
nkeynes@736 | 616 | poly->mod_vertex_index = pvr2_scene.vertex_index;
|
nkeynes@863 | 617 | if( is_modified == SHADOW_FULL ) {
|
nkeynes@863 | 618 | int mod_offset = (vertex_length - 3)>>1;
|
nkeynes@863 | 619 | ptr = &pvr2_scene.pvr2_pbuf[poly_idx] + 5;
|
nkeynes@863 | 620 | for( i=0; i<4; i++ ) {
|
nkeynes@1140 | 621 | pvr2_decode_render_vertex( &quad[4], context[0], context[3], context[4], ptr, mod_offset );
|
nkeynes@863 | 622 | ptr += vertex_length;
|
nkeynes@863 | 623 | }
|
nkeynes@863 | 624 | scene_compute_vertexes( &quad[3], 1, &quad[0], !POLY1_GOURAUD_SHADED(context[0]) );
|
nkeynes@863 | 625 | memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index], quad, sizeof(struct vertex_struct)*2 );
|
nkeynes@863 | 626 | memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index+2], &quad[3], sizeof(struct vertex_struct) );
|
nkeynes@863 | 627 | memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index+3], &quad[2], sizeof(struct vertex_struct) );
|
nkeynes@863 | 628 | } else {
|
nkeynes@863 | 629 | scene_add_cheap_shadow_vertexes( &pvr2_scene.vertex_array[poly->vertex_index],
|
nkeynes@863 | 630 | &pvr2_scene.vertex_array[poly->mod_vertex_index], poly->vertex_count );
|
nkeynes@863 | 631 | pvr2_scene.vertex_index += poly->vertex_count;
|
nkeynes@736 | 632 | }
|
nkeynes@736 | 633 | pvr2_scene.vertex_index += 4;
|
nkeynes@736 | 634 | }
|
nkeynes@635 | 635 | }
|
nkeynes@635 | 636 | }
|
nkeynes@635 | 637 |
|
nkeynes@639 | 638 | static void scene_extract_polygons( pvraddr_t tile_entry )
|
nkeynes@635 | 639 | {
|
nkeynes@934 | 640 | uint32_t *tile_list = (uint32_t *)(pvr2_main_ram+tile_entry);
|
nkeynes@635 | 641 | do {
|
nkeynes@687 | 642 | uint32_t entry = *tile_list++;
|
nkeynes@687 | 643 | if( entry >> 28 == 0x0F ) {
|
nkeynes@687 | 644 | break;
|
nkeynes@687 | 645 | } else if( entry >> 28 == 0x0E ) {
|
nkeynes@934 | 646 | tile_list = (uint32_t *)(pvr2_main_ram + (entry&0x007FFFFF));
|
nkeynes@687 | 647 | } else {
|
nkeynes@687 | 648 | pvraddr_t polyaddr = entry&0x000FFFFF;
|
nkeynes@863 | 649 | shadow_mode_t is_modified = (entry & 0x01000000) ? pvr2_scene.shadow_mode : SHADOW_NONE;
|
nkeynes@687 | 650 | int vertex_length = (entry >> 21) & 0x07;
|
nkeynes@687 | 651 | int context_length = 3;
|
nkeynes@863 | 652 | if( is_modified == SHADOW_FULL ) {
|
nkeynes@687 | 653 | context_length = 5;
|
nkeynes@687 | 654 | vertex_length <<= 1 ;
|
nkeynes@687 | 655 | }
|
nkeynes@687 | 656 | vertex_length += 3;
|
nkeynes@687 | 657 |
|
nkeynes@687 | 658 | if( (entry & 0xE0000000) == 0x80000000 ) {
|
nkeynes@687 | 659 | /* Triangle(s) */
|
nkeynes@687 | 660 | int strip_count = ((entry >> 25) & 0x0F)+1;
|
nkeynes@687 | 661 | int polygon_length = 3 * vertex_length + context_length;
|
nkeynes@687 | 662 | int i;
|
nkeynes@687 | 663 | struct polygon_struct *last_poly = NULL;
|
nkeynes@687 | 664 | for( i=0; i<strip_count; i++ ) {
|
nkeynes@687 | 665 | struct polygon_struct *poly = scene_add_polygon( polyaddr, 3, is_modified );
|
nkeynes@687 | 666 | polyaddr += polygon_length;
|
nkeynes@687 | 667 | if( last_poly != NULL && last_poly->next == NULL ) {
|
nkeynes@687 | 668 | last_poly->next = poly;
|
nkeynes@687 | 669 | }
|
nkeynes@687 | 670 | last_poly = poly;
|
nkeynes@687 | 671 | }
|
nkeynes@687 | 672 | } else if( (entry & 0xE0000000) == 0xA0000000 ) {
|
nkeynes@687 | 673 | /* Sprite(s) */
|
nkeynes@687 | 674 | int strip_count = ((entry >> 25) & 0x0F)+1;
|
nkeynes@687 | 675 | int polygon_length = 4 * vertex_length + context_length;
|
nkeynes@687 | 676 | int i;
|
nkeynes@687 | 677 | struct polygon_struct *last_poly = NULL;
|
nkeynes@687 | 678 | for( i=0; i<strip_count; i++ ) {
|
nkeynes@687 | 679 | struct polygon_struct *poly = scene_add_polygon( polyaddr, 4, is_modified );
|
nkeynes@687 | 680 | polyaddr += polygon_length;
|
nkeynes@687 | 681 | if( last_poly != NULL && last_poly->next == NULL ) {
|
nkeynes@687 | 682 | last_poly->next = poly;
|
nkeynes@687 | 683 | }
|
nkeynes@687 | 684 | last_poly = poly;
|
nkeynes@687 | 685 | }
|
nkeynes@687 | 686 | } else {
|
nkeynes@687 | 687 | /* Polygon */
|
nkeynes@687 | 688 | int i, last = -1;
|
nkeynes@687 | 689 | for( i=5; i>=0; i-- ) {
|
nkeynes@687 | 690 | if( entry & (0x40000000>>i) ) {
|
nkeynes@687 | 691 | last = i;
|
nkeynes@687 | 692 | break;
|
nkeynes@687 | 693 | }
|
nkeynes@687 | 694 | }
|
nkeynes@687 | 695 | if( last != -1 ) {
|
nkeynes@687 | 696 | scene_add_polygon( polyaddr, last+3, is_modified );
|
nkeynes@687 | 697 | }
|
nkeynes@687 | 698 | }
|
nkeynes@687 | 699 | }
|
nkeynes@635 | 700 | } while( 1 );
|
nkeynes@635 | 701 | }
|
nkeynes@635 | 702 |
|
nkeynes@639 | 703 | static void scene_extract_vertexes( pvraddr_t tile_entry )
|
nkeynes@635 | 704 | {
|
nkeynes@934 | 705 | uint32_t *tile_list = (uint32_t *)(pvr2_main_ram+tile_entry);
|
nkeynes@635 | 706 | do {
|
nkeynes@736 | 707 | uint32_t entry = *tile_list++;
|
nkeynes@736 | 708 | if( entry >> 28 == 0x0F ) {
|
nkeynes@736 | 709 | break;
|
nkeynes@736 | 710 | } else if( entry >> 28 == 0x0E ) {
|
nkeynes@934 | 711 | tile_list = (uint32_t *)(pvr2_main_ram + (entry&0x007FFFFF));
|
nkeynes@736 | 712 | } else {
|
nkeynes@736 | 713 | pvraddr_t polyaddr = entry&0x000FFFFF;
|
nkeynes@863 | 714 | shadow_mode_t is_modified = (entry & 0x01000000) ? pvr2_scene.shadow_mode : SHADOW_NONE;
|
nkeynes@736 | 715 | int vertex_length = (entry >> 21) & 0x07;
|
nkeynes@736 | 716 | int context_length = 3;
|
nkeynes@863 | 717 | if( is_modified == SHADOW_FULL ) {
|
nkeynes@736 | 718 | context_length = 5;
|
nkeynes@736 | 719 | vertex_length <<=1 ;
|
nkeynes@736 | 720 | }
|
nkeynes@736 | 721 | vertex_length += 3;
|
nkeynes@736 | 722 |
|
nkeynes@736 | 723 | if( (entry & 0xE0000000) == 0x80000000 ) {
|
nkeynes@736 | 724 | /* Triangle(s) */
|
nkeynes@736 | 725 | int strip_count = ((entry >> 25) & 0x0F)+1;
|
nkeynes@736 | 726 | int polygon_length = 3 * vertex_length + context_length;
|
nkeynes@736 | 727 | int i;
|
nkeynes@736 | 728 | for( i=0; i<strip_count; i++ ) {
|
nkeynes@736 | 729 | scene_add_vertexes( polyaddr, vertex_length, is_modified );
|
nkeynes@736 | 730 | polyaddr += polygon_length;
|
nkeynes@736 | 731 | }
|
nkeynes@736 | 732 | } else if( (entry & 0xE0000000) == 0xA0000000 ) {
|
nkeynes@736 | 733 | /* Sprite(s) */
|
nkeynes@736 | 734 | int strip_count = ((entry >> 25) & 0x0F)+1;
|
nkeynes@736 | 735 | int polygon_length = 4 * vertex_length + context_length;
|
nkeynes@736 | 736 | int i;
|
nkeynes@736 | 737 | for( i=0; i<strip_count; i++ ) {
|
nkeynes@736 | 738 | scene_add_quad_vertexes( polyaddr, vertex_length, is_modified );
|
nkeynes@736 | 739 | polyaddr += polygon_length;
|
nkeynes@736 | 740 | }
|
nkeynes@736 | 741 | } else {
|
nkeynes@736 | 742 | /* Polygon */
|
nkeynes@736 | 743 | int i, last = -1;
|
nkeynes@736 | 744 | for( i=5; i>=0; i-- ) {
|
nkeynes@736 | 745 | if( entry & (0x40000000>>i) ) {
|
nkeynes@736 | 746 | last = i;
|
nkeynes@736 | 747 | break;
|
nkeynes@736 | 748 | }
|
nkeynes@736 | 749 | }
|
nkeynes@736 | 750 | if( last != -1 ) {
|
nkeynes@736 | 751 | scene_add_vertexes( polyaddr, vertex_length, is_modified );
|
nkeynes@736 | 752 | }
|
nkeynes@736 | 753 | }
|
nkeynes@736 | 754 | }
|
nkeynes@827 | 755 | } while( 1 );
|
nkeynes@635 | 756 | }
|
nkeynes@635 | 757 |
|
nkeynes@687 | 758 | static void scene_extract_background( void )
|
nkeynes@687 | 759 | {
|
nkeynes@687 | 760 | uint32_t bgplane = MMIO_READ(PVR2, RENDER_BGPLANE);
|
nkeynes@687 | 761 | int vertex_length = (bgplane >> 24) & 0x07;
|
nkeynes@687 | 762 | int context_length = 3, i;
|
nkeynes@863 | 763 | shadow_mode_t is_modified = (bgplane & 0x08000000) ? pvr2_scene.shadow_mode : SHADOW_NONE;
|
nkeynes@687 | 764 |
|
nkeynes@687 | 765 | struct polygon_struct *poly = &pvr2_scene.poly_array[pvr2_scene.poly_count++];
|
nkeynes@687 | 766 | uint32_t *context = &pvr2_scene.pvr2_pbuf[(bgplane & 0x00FFFFFF)>>3];
|
nkeynes@687 | 767 | poly->context = context;
|
nkeynes@687 | 768 | poly->vertex_count = 4;
|
nkeynes@687 | 769 | poly->vertex_index = pvr2_scene.vertex_count;
|
nkeynes@863 | 770 | if( is_modified == SHADOW_FULL ) {
|
nkeynes@687 | 771 | context_length = 5;
|
nkeynes@687 | 772 | vertex_length <<= 1;
|
nkeynes@863 | 773 | }
|
nkeynes@863 | 774 | if( is_modified != SHADOW_NONE ) {
|
nkeynes@687 | 775 | poly->mod_vertex_index = pvr2_scene.vertex_count + 4;
|
nkeynes@827 | 776 | pvr2_scene.vertex_count += 8;
|
nkeynes@687 | 777 | } else {
|
nkeynes@687 | 778 | poly->mod_vertex_index = -1;
|
nkeynes@687 | 779 | pvr2_scene.vertex_count += 4;
|
nkeynes@687 | 780 | }
|
nkeynes@687 | 781 | vertex_length += 3;
|
nkeynes@687 | 782 | context_length += (bgplane & 0x07) * vertex_length;
|
nkeynes@687 | 783 |
|
nkeynes@687 | 784 | poly->next = NULL;
|
nkeynes@1133 | 785 | poly->sub_next = NULL;
|
nkeynes@687 | 786 | pvr2_scene.bkgnd_poly = poly;
|
nkeynes@736 | 787 |
|
nkeynes@687 | 788 | struct vertex_struct base_vertexes[3];
|
nkeynes@827 | 789 | uint32_t *ptr = context + context_length;
|
nkeynes@687 | 790 | for( i=0; i<3; i++ ) {
|
nkeynes@1140 | 791 | pvr2_decode_render_vertex( &base_vertexes[i], context[0], context[1], context[2],
|
nkeynes@736 | 792 | ptr, 0 );
|
nkeynes@687 | 793 | ptr += vertex_length;
|
nkeynes@687 | 794 | }
|
nkeynes@687 | 795 | struct vertex_struct *result_vertexes = &pvr2_scene.vertex_array[poly->vertex_index];
|
nkeynes@687 | 796 | result_vertexes[0].x = result_vertexes[0].y = 0;
|
nkeynes@687 | 797 | result_vertexes[1].x = result_vertexes[3].x = pvr2_scene.buffer_width;
|
nkeynes@687 | 798 | result_vertexes[1].y = result_vertexes[2].x = 0;
|
nkeynes@687 | 799 | result_vertexes[2].y = result_vertexes[3].y = pvr2_scene.buffer_height;
|
nkeynes@687 | 800 | scene_compute_vertexes( result_vertexes, 4, base_vertexes, !POLY1_GOURAUD_SHADED(context[0]) );
|
nkeynes@687 | 801 |
|
nkeynes@863 | 802 | if( is_modified == SHADOW_FULL ) {
|
nkeynes@687 | 803 | int mod_offset = (vertex_length - 3)>>1;
|
nkeynes@687 | 804 | ptr = context + context_length;
|
nkeynes@687 | 805 | for( i=0; i<3; i++ ) {
|
nkeynes@1140 | 806 | pvr2_decode_render_vertex( &base_vertexes[i], context[0], context[3], context[4],
|
nkeynes@736 | 807 | ptr, mod_offset );
|
nkeynes@687 | 808 | ptr += vertex_length;
|
nkeynes@687 | 809 | }
|
nkeynes@687 | 810 | result_vertexes = &pvr2_scene.vertex_array[poly->mod_vertex_index];
|
nkeynes@687 | 811 | result_vertexes[0].x = result_vertexes[0].y = 0;
|
nkeynes@687 | 812 | result_vertexes[1].x = result_vertexes[3].x = pvr2_scene.buffer_width;
|
nkeynes@687 | 813 | result_vertexes[1].y = result_vertexes[2].x = 0;
|
nkeynes@687 | 814 | result_vertexes[2].y = result_vertexes[3].y = pvr2_scene.buffer_height;
|
nkeynes@687 | 815 | scene_compute_vertexes( result_vertexes, 4, base_vertexes, !POLY1_GOURAUD_SHADED(context[0]) );
|
nkeynes@863 | 816 | } else if( is_modified == SHADOW_CHEAP ) {
|
nkeynes@863 | 817 | scene_add_cheap_shadow_vertexes( &pvr2_scene.vertex_array[poly->vertex_index],
|
nkeynes@863 | 818 | &pvr2_scene.vertex_array[poly->mod_vertex_index], poly->vertex_count );
|
nkeynes@863 | 819 | pvr2_scene.vertex_index += poly->vertex_count;
|
nkeynes@687 | 820 | }
|
nkeynes@736 | 821 |
|
nkeynes@687 | 822 | }
|
nkeynes@687 | 823 |
|
nkeynes@687 | 824 |
|
nkeynes@639 | 825 | uint32_t pvr2_scene_buffer_width()
|
nkeynes@639 | 826 | {
|
nkeynes@639 | 827 | return pvr2_scene.buffer_width;
|
nkeynes@639 | 828 | }
|
nkeynes@639 | 829 |
|
nkeynes@639 | 830 | uint32_t pvr2_scene_buffer_height()
|
nkeynes@639 | 831 | {
|
nkeynes@639 | 832 | return pvr2_scene.buffer_height;
|
nkeynes@639 | 833 | }
|
nkeynes@639 | 834 |
|
nkeynes@635 | 835 | /**
|
nkeynes@635 | 836 | * Extract the current scene into the rendering structures. We run two passes
|
nkeynes@827 | 837 | * - first pass extracts the polygons into pvr2_scene.poly_array (finding vertex counts),
|
nkeynes@635 | 838 | * second pass extracts the vertex data into the VBO/vertex array.
|
nkeynes@635 | 839 | *
|
nkeynes@827 | 840 | * Difficult to do in single pass as we don't generally know the size of a
|
nkeynes@635 | 841 | * polygon for certain until we've seen all tiles containing it. It also means we
|
nkeynes@635 | 842 | * can count the vertexes and allocate the appropriate size VBO.
|
nkeynes@635 | 843 | *
|
nkeynes@635 | 844 | * FIXME: accesses into VRAM need to be bounds-checked properly
|
nkeynes@635 | 845 | */
|
nkeynes@635 | 846 | void pvr2_scene_read( void )
|
nkeynes@635 | 847 | {
|
nkeynes@635 | 848 | pvr2_scene_init();
|
nkeynes@639 | 849 | pvr2_scene_reset();
|
nkeynes@635 | 850 |
|
nkeynes@635 | 851 | pvr2_scene.bounds[0] = MMIO_READ( PVR2, RENDER_HCLIP ) & 0x03FF;
|
nkeynes@635 | 852 | pvr2_scene.bounds[1] = ((MMIO_READ( PVR2, RENDER_HCLIP ) >> 16) & 0x03FF) + 1;
|
nkeynes@635 | 853 | pvr2_scene.bounds[2] = MMIO_READ( PVR2, RENDER_VCLIP ) & 0x03FF;
|
nkeynes@635 | 854 | pvr2_scene.bounds[3] = ((MMIO_READ( PVR2, RENDER_VCLIP ) >> 16) & 0x03FF) + 1;
|
nkeynes@635 | 855 | pvr2_scene.bounds[4] = pvr2_scene.bounds[5] = MMIO_READF( PVR2, RENDER_FARCLIP );
|
nkeynes@635 | 856 |
|
nkeynes@827 | 857 | uint32_t scaler = MMIO_READ( PVR2, RENDER_SCALER );
|
nkeynes@827 | 858 | if( scaler & SCALER_HSCALE ) {
|
nkeynes@827 | 859 | /* If the horizontal scaler is in use, we're (in principle) supposed to
|
nkeynes@827 | 860 | * divide everything by 2. However in the interests of display quality,
|
nkeynes@827 | 861 | * instead we want to render to the unscaled resolution and downsample
|
nkeynes@827 | 862 | * only if/when required.
|
nkeynes@827 | 863 | */
|
nkeynes@827 | 864 | pvr2_scene.bounds[1] *= 2;
|
nkeynes@827 | 865 | }
|
nkeynes@847 | 866 |
|
nkeynes@847 | 867 | uint32_t fog_col = MMIO_READ( PVR2, RENDER_FOGTBLCOL );
|
nkeynes@847 | 868 | unpack_bgra( fog_col, pvr2_scene.fog_lut_colour );
|
nkeynes@847 | 869 | fog_col = MMIO_READ( PVR2, RENDER_FOGVRTCOL );
|
nkeynes@847 | 870 | unpack_bgra( fog_col, pvr2_scene.fog_vert_colour );
|
nkeynes@847 | 871 |
|
nkeynes@934 | 872 | uint32_t *tilebuffer = (uint32_t *)(pvr2_main_ram + MMIO_READ( PVR2, RENDER_TILEBASE ));
|
nkeynes@635 | 873 | uint32_t *segment = tilebuffer;
|
nkeynes@863 | 874 | uint32_t shadow = MMIO_READ(PVR2,RENDER_SHADOW);
|
nkeynes@635 | 875 | pvr2_scene.segment_list = (struct tile_segment *)tilebuffer;
|
nkeynes@934 | 876 | pvr2_scene.pvr2_pbuf = (uint32_t *)(pvr2_main_ram + MMIO_READ(PVR2,RENDER_POLYBASE));
|
nkeynes@863 | 877 | pvr2_scene.shadow_mode = shadow & 0x100 ? SHADOW_CHEAP : SHADOW_FULL;
|
nkeynes@863 | 878 | scene_shadow_intensity = U8TOFLOAT(shadow&0xFF);
|
nkeynes@687 | 879 |
|
nkeynes@635 | 880 | int max_tile_x = 0;
|
nkeynes@635 | 881 | int max_tile_y = 0;
|
nkeynes@635 | 882 | int obj_config = MMIO_READ( PVR2, RENDER_OBJCFG );
|
nkeynes@635 | 883 | int isp_config = MMIO_READ( PVR2, RENDER_ISPCFG );
|
nkeynes@635 | 884 |
|
nkeynes@635 | 885 | if( (obj_config & 0x00200000) == 0 ) {
|
nkeynes@687 | 886 | if( isp_config & 1 ) {
|
nkeynes@687 | 887 | pvr2_scene.sort_mode = SORT_NEVER;
|
nkeynes@687 | 888 | } else {
|
nkeynes@687 | 889 | pvr2_scene.sort_mode = SORT_ALWAYS;
|
nkeynes@687 | 890 | }
|
nkeynes@635 | 891 | } else {
|
nkeynes@687 | 892 | pvr2_scene.sort_mode = SORT_TILEFLAG;
|
nkeynes@635 | 893 | }
|
nkeynes@635 | 894 |
|
nkeynes@827 | 895 | // Pass 1: Extract polygon list
|
nkeynes@635 | 896 | uint32_t control;
|
nkeynes@635 | 897 | int i;
|
nkeynes@635 | 898 | do {
|
nkeynes@687 | 899 | control = *segment++;
|
nkeynes@687 | 900 | int tile_x = SEGMENT_X(control);
|
nkeynes@687 | 901 | int tile_y = SEGMENT_Y(control);
|
nkeynes@687 | 902 | if( tile_x > max_tile_x ) {
|
nkeynes@687 | 903 | max_tile_x = tile_x;
|
nkeynes@827 | 904 | }
|
nkeynes@687 | 905 | if( tile_y > max_tile_y ) {
|
nkeynes@687 | 906 | max_tile_y = tile_y;
|
nkeynes@687 | 907 | }
|
nkeynes@687 | 908 | for( i=0; i<5; i++ ) {
|
nkeynes@687 | 909 | if( (*segment & NO_POINTER) == 0 ) {
|
nkeynes@687 | 910 | scene_extract_polygons( *segment );
|
nkeynes@687 | 911 | }
|
nkeynes@687 | 912 | segment++;
|
nkeynes@687 | 913 | }
|
nkeynes@635 | 914 | } while( (control & SEGMENT_END) == 0 );
|
nkeynes@635 | 915 |
|
nkeynes@635 | 916 | pvr2_scene.buffer_width = (max_tile_x+1)<<5;
|
nkeynes@635 | 917 | pvr2_scene.buffer_height = (max_tile_y+1)<<5;
|
nkeynes@635 | 918 |
|
nkeynes@687 | 919 | // Pass 2: Extract vertex data
|
nkeynes@687 | 920 | vertex_buffer_map();
|
nkeynes@687 | 921 | pvr2_scene.vertex_index = 0;
|
nkeynes@687 | 922 | segment = tilebuffer;
|
nkeynes@687 | 923 | do {
|
nkeynes@687 | 924 | control = *segment++;
|
nkeynes@687 | 925 | for( i=0; i<5; i++ ) {
|
nkeynes@687 | 926 | if( (*segment & NO_POINTER) == 0 ) {
|
nkeynes@687 | 927 | scene_extract_vertexes( *segment );
|
nkeynes@687 | 928 | }
|
nkeynes@687 | 929 | segment++;
|
nkeynes@687 | 930 | }
|
nkeynes@687 | 931 | } while( (control & SEGMENT_END) == 0 );
|
nkeynes@736 | 932 |
|
nkeynes@687 | 933 | scene_extract_background();
|
nkeynes@847 | 934 | scene_compute_lut_fog();
|
nkeynes@1133 | 935 | scene_backface_cull();
|
nkeynes@736 | 936 |
|
nkeynes@687 | 937 | vertex_buffer_unmap();
|
nkeynes@635 | 938 | }
|
nkeynes@645 | 939 |
|
nkeynes@645 | 940 | /**
|
nkeynes@645 | 941 | * Dump the current scene to file in a (mostly) human readable form
|
nkeynes@645 | 942 | */
|
nkeynes@1142 | 943 | void pvr2_scene_print( FILE *f )
|
nkeynes@645 | 944 | {
|
nkeynes@645 | 945 | int i,j;
|
nkeynes@645 | 946 |
|
nkeynes@645 | 947 | fprintf( f, "Polygons: %d\n", pvr2_scene.poly_count );
|
nkeynes@645 | 948 | for( i=0; i<pvr2_scene.poly_count; i++ ) {
|
nkeynes@736 | 949 | struct polygon_struct *poly = &pvr2_scene.poly_array[i];
|
nkeynes@1074 | 950 | fprintf( f, " %08X ", (uint32_t)(((unsigned char *)poly->context) - pvr2_main_ram) );
|
nkeynes@736 | 951 | switch( poly->vertex_count ) {
|
nkeynes@736 | 952 | case 3: fprintf( f, "Tri " ); break;
|
nkeynes@736 | 953 | case 4: fprintf( f, "Quad " ); break;
|
nkeynes@736 | 954 | default: fprintf( f,"%d-Strip ", poly->vertex_count-2 ); break;
|
nkeynes@736 | 955 | }
|
nkeynes@736 | 956 | fprintf( f, "%08X %08X %08X ", poly->context[0], poly->context[1], poly->context[2] );
|
nkeynes@736 | 957 | if( poly->mod_vertex_index != -1 ) {
|
nkeynes@736 | 958 | fprintf( f, "%08X %08X\n", poly->context[3], poly->context[5] );
|
nkeynes@736 | 959 | } else {
|
nkeynes@736 | 960 | fprintf( f, "\n" );
|
nkeynes@736 | 961 | }
|
nkeynes@736 | 962 |
|
nkeynes@736 | 963 | for( j=0; j<poly->vertex_count; j++ ) {
|
nkeynes@736 | 964 | struct vertex_struct *v = &pvr2_scene.vertex_array[poly->vertex_index+j];
|
nkeynes@784 | 965 | 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 | 966 | v->rgba[0], v->rgba[1], v->rgba[2], v->rgba[3],
|
nkeynes@784 | 967 | v->offset_rgba[0], v->offset_rgba[1], v->offset_rgba[2], v->offset_rgba[3] );
|
nkeynes@736 | 968 | }
|
nkeynes@736 | 969 | if( poly->mod_vertex_index != -1 ) {
|
nkeynes@736 | 970 | fprintf( f, " ---\n" );
|
nkeynes@736 | 971 | for( j=0; j<poly->vertex_count; j++ ) {
|
nkeynes@736 | 972 | struct vertex_struct *v = &pvr2_scene.vertex_array[poly->mod_vertex_index+j];
|
nkeynes@784 | 973 | 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 | 974 | v->rgba[0], v->rgba[1], v->rgba[2], v->rgba[3],
|
nkeynes@784 | 975 | v->offset_rgba[0], v->offset_rgba[1], v->offset_rgba[2], v->offset_rgba[3] );
|
nkeynes@736 | 976 | }
|
nkeynes@736 | 977 | }
|
nkeynes@645 | 978 | }
|
nkeynes@645 | 979 |
|
nkeynes@645 | 980 | }
|
nkeynes@1142 | 981 |
|
nkeynes@1142 | 982 | void pvr2_scene_dump()
|
nkeynes@1142 | 983 | {
|
nkeynes@1142 | 984 | pvr2_scene_print(stdout);
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nkeynes@1142 | 985 | }
|