nkeynes@653 | 1 | /**
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nkeynes@653 | 2 | * $Id$
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nkeynes@653 | 3 | *
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nkeynes@653 | 4 | * Standard OpenGL rendering engine.
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nkeynes@653 | 5 | *
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nkeynes@653 | 6 | * Copyright (c) 2005 Nathan Keynes.
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nkeynes@653 | 7 | *
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nkeynes@653 | 8 | * This program is free software; you can redistribute it and/or modify
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nkeynes@653 | 9 | * it under the terms of the GNU General Public License as published by
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nkeynes@653 | 10 | * the Free Software Foundation; either version 2 of the License, or
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nkeynes@653 | 11 | * (at your option) any later version.
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nkeynes@653 | 12 | *
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nkeynes@653 | 13 | * This program is distributed in the hope that it will be useful,
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nkeynes@653 | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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nkeynes@653 | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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nkeynes@653 | 16 | * GNU General Public License for more details.
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nkeynes@653 | 17 | */
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nkeynes@653 | 18 |
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nkeynes@653 | 19 | #include <assert.h>
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nkeynes@653 | 20 | #include "display.h"
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nkeynes@653 | 21 | #include "pvr2/pvr2.h"
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nkeynes@653 | 22 | #include "pvr2/scene.h"
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nkeynes@665 | 23 | #include "pvr2/glutil.h"
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nkeynes@653 | 24 |
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nkeynes@653 | 25 | int pvr2_poly_depthmode[8] = { GL_NEVER, GL_LESS, GL_EQUAL, GL_LEQUAL,
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nkeynes@653 | 26 | GL_GREATER, GL_NOTEQUAL, GL_GEQUAL,
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nkeynes@653 | 27 | GL_ALWAYS };
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nkeynes@653 | 28 | int pvr2_poly_srcblend[8] = {
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nkeynes@653 | 29 | GL_ZERO, GL_ONE, GL_DST_COLOR, GL_ONE_MINUS_DST_COLOR,
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nkeynes@653 | 30 | GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_DST_ALPHA,
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nkeynes@653 | 31 | GL_ONE_MINUS_DST_ALPHA };
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nkeynes@653 | 32 | int pvr2_poly_dstblend[8] = {
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nkeynes@653 | 33 | GL_ZERO, GL_ONE, GL_SRC_COLOR, GL_ONE_MINUS_SRC_COLOR,
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nkeynes@653 | 34 | GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_DST_ALPHA,
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nkeynes@653 | 35 | GL_ONE_MINUS_DST_ALPHA };
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nkeynes@653 | 36 | int pvr2_poly_texblend[4] = {
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nkeynes@653 | 37 | GL_REPLACE,
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nkeynes@653 | 38 | GL_MODULATE,
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nkeynes@653 | 39 | GL_DECAL,
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nkeynes@653 | 40 | GL_MODULATE
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nkeynes@653 | 41 | };
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nkeynes@653 | 42 | int pvr2_render_colour_format[8] = {
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nkeynes@653 | 43 | COLFMT_BGRA1555, COLFMT_RGB565, COLFMT_BGRA4444, COLFMT_BGRA1555,
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nkeynes@653 | 44 | COLFMT_BGR888, COLFMT_BGRA8888, COLFMT_BGRA8888, COLFMT_BGRA4444 };
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nkeynes@653 | 45 |
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nkeynes@653 | 46 |
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nkeynes@653 | 47 | /**
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nkeynes@653 | 48 | * Clip the tile bounds to the clipping plane.
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nkeynes@653 | 49 | * @return TRUE if the tile was not clipped completely.
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nkeynes@653 | 50 | */
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nkeynes@653 | 51 | static gboolean clip_tile_bounds( uint32_t *tile, float *clip )
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nkeynes@653 | 52 | {
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nkeynes@653 | 53 | if( tile[0] < clip[0] ) tile[0] = clip[0];
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nkeynes@653 | 54 | if( tile[1] > clip[1] ) tile[1] = clip[1];
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nkeynes@653 | 55 | if( tile[2] < clip[2] ) tile[2] = clip[2];
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nkeynes@653 | 56 | if( tile[3] > clip[3] ) tile[3] = clip[3];
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nkeynes@653 | 57 | return tile[0] < tile[1] && tile[2] < tile[3];
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nkeynes@653 | 58 | }
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nkeynes@653 | 59 |
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nkeynes@653 | 60 | void pvr2_scene_load_textures()
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nkeynes@653 | 61 | {
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nkeynes@653 | 62 | int i;
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nkeynes@653 | 63 | for( i=0; i < pvr2_scene.poly_count; i++ ) {
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nkeynes@653 | 64 | struct polygon_struct *poly = &pvr2_scene.poly_array[i];
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nkeynes@653 | 65 | if( POLY1_TEXTURED(poly->context[0]) ) {
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nkeynes@653 | 66 | poly->tex_id = texcache_get_texture( poly->context[2],
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nkeynes@653 | 67 | POLY2_TEX_WIDTH(poly->context[1]),
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nkeynes@653 | 68 | POLY2_TEX_HEIGHT(poly->context[1]) );
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nkeynes@653 | 69 | if( poly->mod_vertex_index != -1 ) {
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nkeynes@653 | 70 | poly->mod_tex_id = texcache_get_texture( poly->context[4],
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nkeynes@653 | 71 | POLY2_TEX_WIDTH(poly->context[3]),
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nkeynes@653 | 72 | POLY2_TEX_HEIGHT(poly->context[3]) );
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nkeynes@653 | 73 | }
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nkeynes@653 | 74 | } else {
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nkeynes@653 | 75 | poly->tex_id = -1;
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nkeynes@653 | 76 | poly->mod_tex_id = -1;
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nkeynes@653 | 77 | }
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nkeynes@653 | 78 | }
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nkeynes@653 | 79 | }
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nkeynes@653 | 80 |
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nkeynes@653 | 81 |
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nkeynes@653 | 82 |
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nkeynes@653 | 83 | /**
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nkeynes@653 | 84 | * Once-off call to setup the OpenGL context.
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nkeynes@653 | 85 | */
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nkeynes@653 | 86 | void pvr2_setup_gl_context()
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nkeynes@653 | 87 | {
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nkeynes@665 | 88 |
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nkeynes@665 | 89 | if( glsl_is_supported() ) {
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nkeynes@665 | 90 | if( !glsl_load_shaders( glsl_vertex_shader_src, NULL ) ) {
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nkeynes@665 | 91 | WARN( "Unable to load GL shaders" );
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nkeynes@665 | 92 | }
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nkeynes@665 | 93 | }
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nkeynes@665 | 94 |
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nkeynes@653 | 95 | texcache_gl_init(); // Allocate texture IDs
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nkeynes@653 | 96 | glCullFace( GL_BACK );
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nkeynes@653 | 97 | glEnable( GL_BLEND );
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nkeynes@653 | 98 | glEnable( GL_DEPTH_TEST );
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nkeynes@653 | 99 | glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
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nkeynes@653 | 100 | glMatrixMode(GL_MODELVIEW);
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nkeynes@653 | 101 | glLoadIdentity();
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nkeynes@653 | 102 |
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nkeynes@653 | 103 | glEnableClientState( GL_COLOR_ARRAY );
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nkeynes@653 | 104 | glEnableClientState( GL_VERTEX_ARRAY );
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nkeynes@653 | 105 | glEnableClientState( GL_TEXTURE_COORD_ARRAY );
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nkeynes@653 | 106 | glEnableClientState( GL_SECONDARY_COLOR_ARRAY );
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nkeynes@653 | 107 |
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nkeynes@653 | 108 | glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
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nkeynes@653 | 109 | glClearDepth(0);
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nkeynes@653 | 110 | glClearStencil(0);
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nkeynes@653 | 111 | }
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nkeynes@653 | 112 |
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nkeynes@653 | 113 | /**
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nkeynes@653 | 114 | * Setup the GL context for the supplied polygon context.
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nkeynes@653 | 115 | * @param context pointer to 3 or 5 words of polygon context
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nkeynes@653 | 116 | * @param modified boolean flag indicating that the modified
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nkeynes@653 | 117 | * version should be used, rather than the normal version.
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nkeynes@653 | 118 | */
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nkeynes@653 | 119 | void render_set_context( uint32_t *context, int render_mode )
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nkeynes@653 | 120 | {
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nkeynes@653 | 121 | uint32_t poly1 = context[0], poly2, texture;
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nkeynes@653 | 122 | if( render_mode == RENDER_FULLMOD ) {
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nkeynes@653 | 123 | poly2 = context[3];
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nkeynes@653 | 124 | texture = context[4];
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nkeynes@653 | 125 | } else {
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nkeynes@653 | 126 | poly2 = context[1];
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nkeynes@653 | 127 | texture = context[2];
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nkeynes@653 | 128 | }
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nkeynes@653 | 129 |
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nkeynes@653 | 130 | glDepthFunc( POLY1_DEPTH_MODE(poly1) );
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nkeynes@653 | 131 | glDepthMask( POLY1_DEPTH_WRITE(poly1) ? GL_TRUE : GL_FALSE );
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nkeynes@653 | 132 |
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nkeynes@653 | 133 | switch( POLY1_CULL_MODE(poly1) ) {
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nkeynes@653 | 134 | case CULL_NONE:
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nkeynes@653 | 135 | case CULL_SMALL:
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nkeynes@653 | 136 | glDisable( GL_CULL_FACE );
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nkeynes@653 | 137 | break;
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nkeynes@653 | 138 | case CULL_CCW:
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nkeynes@653 | 139 | glEnable( GL_CULL_FACE );
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nkeynes@653 | 140 | glFrontFace( GL_CW );
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nkeynes@653 | 141 | break;
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nkeynes@653 | 142 | case CULL_CW:
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nkeynes@653 | 143 | glEnable( GL_CULL_FACE );
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nkeynes@653 | 144 | glFrontFace( GL_CCW );
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nkeynes@653 | 145 | break;
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nkeynes@653 | 146 | }
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nkeynes@653 | 147 |
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nkeynes@653 | 148 | if( POLY1_SPECULAR(poly1) ) {
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nkeynes@653 | 149 | glEnable(GL_COLOR_SUM);
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nkeynes@653 | 150 | } else {
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nkeynes@653 | 151 | glDisable(GL_COLOR_SUM);
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nkeynes@653 | 152 | }
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nkeynes@653 | 153 |
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nkeynes@653 | 154 |
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nkeynes@653 | 155 | if( POLY1_TEXTURED(poly1) ) {
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nkeynes@653 | 156 | int width = POLY2_TEX_WIDTH(poly2);
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nkeynes@653 | 157 | int height = POLY2_TEX_HEIGHT(poly2);
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nkeynes@653 | 158 | glEnable(GL_TEXTURE_2D);
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nkeynes@653 | 159 | glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, pvr2_poly_texblend[POLY2_TEX_BLEND(poly2)] );
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nkeynes@653 | 160 | if( POLY2_TEX_CLAMP_U(poly2) ) {
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nkeynes@653 | 161 | glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP );
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nkeynes@655 | 162 | } else if( POLY2_TEX_MIRROR_U(poly2) ) {
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nkeynes@655 | 163 | glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_MIRRORED_REPEAT_ARB );
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nkeynes@653 | 164 | } else {
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nkeynes@653 | 165 | glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
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nkeynes@653 | 166 | }
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nkeynes@653 | 167 | if( POLY2_TEX_CLAMP_V(poly2) ) {
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nkeynes@653 | 168 | glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP );
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nkeynes@655 | 169 | } else if( POLY2_TEX_MIRROR_V(poly2) ) {
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nkeynes@655 | 170 | glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_MIRRORED_REPEAT_ARB );
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nkeynes@653 | 171 | } else {
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nkeynes@653 | 172 | glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
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nkeynes@653 | 173 | }
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nkeynes@653 | 174 | } else {
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nkeynes@653 | 175 | glDisable( GL_TEXTURE_2D );
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nkeynes@653 | 176 | }
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nkeynes@653 | 177 |
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nkeynes@653 | 178 | glShadeModel( POLY1_SHADE_MODEL(poly1) );
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nkeynes@653 | 179 |
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nkeynes@653 | 180 | int srcblend = POLY2_SRC_BLEND(poly2);
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nkeynes@653 | 181 | int destblend = POLY2_DEST_BLEND(poly2);
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nkeynes@653 | 182 | glBlendFunc( srcblend, destblend );
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nkeynes@653 | 183 |
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nkeynes@653 | 184 | if( POLY2_SRC_BLEND_TARGET(poly2) || POLY2_DEST_BLEND_TARGET(poly2) ) {
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nkeynes@653 | 185 | ERROR( "Accumulation buffer not supported" );
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nkeynes@653 | 186 | }
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nkeynes@653 | 187 |
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nkeynes@653 | 188 | }
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nkeynes@653 | 189 |
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nkeynes@653 | 190 |
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nkeynes@653 | 191 | static void gl_render_poly( struct polygon_struct *poly )
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nkeynes@653 | 192 | {
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nkeynes@653 | 193 | if( poly->tex_id != -1 ) {
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nkeynes@653 | 194 | glBindTexture(GL_TEXTURE_2D, poly->tex_id);
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nkeynes@653 | 195 | }
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nkeynes@653 | 196 | render_set_context( poly->context, RENDER_NORMAL );
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nkeynes@653 | 197 | glDrawArrays(GL_TRIANGLE_STRIP, poly->vertex_index, poly->vertex_count );
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nkeynes@653 | 198 | }
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nkeynes@653 | 199 |
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nkeynes@653 | 200 | void gl_render_tilelist( pvraddr_t tile_entry )
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nkeynes@653 | 201 | {
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nkeynes@653 | 202 | uint32_t *tile_list = (uint32_t *)(video_base+tile_entry);
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nkeynes@653 | 203 | int strip_count;
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nkeynes@653 | 204 | struct polygon_struct *poly;
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nkeynes@653 | 205 |
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nkeynes@653 | 206 | while(1) {
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nkeynes@653 | 207 | uint32_t entry = *tile_list++;
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nkeynes@653 | 208 | switch( entry >> 28 ) {
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nkeynes@653 | 209 | case 0x0F:
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nkeynes@653 | 210 | return; // End-of-list
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nkeynes@653 | 211 | case 0x0E:
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nkeynes@653 | 212 | tile_list = (uint32_t *)(video_base + (entry&0x007FFFFF));
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nkeynes@653 | 213 | break;
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nkeynes@653 | 214 | case 0x08: case 0x09: case 0x0A: case 0x0B:
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nkeynes@653 | 215 | strip_count = ((entry >> 25) & 0x0F)+1;
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nkeynes@653 | 216 | poly = pvr2_scene.buf_to_poly_map[entry&0x000FFFFF];
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nkeynes@653 | 217 | while( strip_count > 0 ) {
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nkeynes@653 | 218 | assert( poly != NULL );
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nkeynes@653 | 219 | gl_render_poly( poly );
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nkeynes@653 | 220 | poly = poly->next;
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nkeynes@653 | 221 | strip_count--;
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nkeynes@653 | 222 | }
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nkeynes@653 | 223 | break;
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nkeynes@653 | 224 | default:
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nkeynes@653 | 225 | if( entry & 0x7E000000 ) {
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nkeynes@653 | 226 | poly = pvr2_scene.buf_to_poly_map[entry&0x000FFFFF];
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nkeynes@653 | 227 | gl_render_poly( poly );
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nkeynes@653 | 228 | }
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nkeynes@653 | 229 | }
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nkeynes@653 | 230 | }
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nkeynes@653 | 231 | }
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nkeynes@653 | 232 |
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nkeynes@653 | 233 |
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nkeynes@653 | 234 | /**
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nkeynes@653 | 235 | * Render the currently defined scene in pvr2_scene
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nkeynes@653 | 236 | */
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nkeynes@653 | 237 | void pvr2_scene_render( render_buffer_t buffer )
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nkeynes@653 | 238 | {
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nkeynes@653 | 239 | /* Scene setup */
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nkeynes@653 | 240 | struct timeval start_tv, tex_tv, end_tv;
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nkeynes@653 | 241 |
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nkeynes@653 | 242 | gettimeofday(&start_tv, NULL);
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nkeynes@653 | 243 | display_driver->set_render_target(buffer);
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nkeynes@653 | 244 | pvr2_check_palette_changed();
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nkeynes@653 | 245 | pvr2_scene_load_textures();
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nkeynes@653 | 246 |
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nkeynes@653 | 247 | gettimeofday( &tex_tv, NULL );
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nkeynes@653 | 248 | uint32_t ms = (tex_tv.tv_sec - start_tv.tv_sec) * 1000 +
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nkeynes@653 | 249 | (tex_tv.tv_usec - start_tv.tv_usec)/1000;
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nkeynes@653 | 250 | DEBUG( "Scene setup in %dms", ms );
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nkeynes@653 | 251 |
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nkeynes@653 | 252 | /* Setup view projection matrix */
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nkeynes@653 | 253 | glMatrixMode(GL_PROJECTION);
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nkeynes@653 | 254 | glLoadIdentity();
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nkeynes@653 | 255 | float nearz = pvr2_scene.bounds[4];
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nkeynes@653 | 256 | float farz = pvr2_scene.bounds[5];
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nkeynes@653 | 257 | if( nearz == farz ) {
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nkeynes@653 | 258 | farz*= 2.0;
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nkeynes@653 | 259 | }
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nkeynes@653 | 260 | glOrtho( 0, pvr2_scene.buffer_width, pvr2_scene.buffer_height, 0,
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nkeynes@653 | 261 | -farz, -nearz );
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nkeynes@653 | 262 | float alphaRef = ((float)(MMIO_READ(PVR2, RENDER_ALPHA_REF)&0xFF)+1)/256.0;
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nkeynes@653 | 263 | glAlphaFunc( GL_GEQUAL, alphaRef );
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nkeynes@653 | 264 |
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nkeynes@653 | 265 | /* Clear the buffer (FIXME: May not want always want to do this) */
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nkeynes@653 | 266 | glDisable( GL_SCISSOR_TEST );
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nkeynes@653 | 267 | glDepthMask( GL_TRUE );
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nkeynes@653 | 268 | glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT );
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nkeynes@653 | 269 |
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nkeynes@653 | 270 | /* Setup vertex array pointers */
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nkeynes@653 | 271 | glInterleavedArrays(GL_T2F_C4UB_V3F, sizeof(struct vertex_struct), pvr2_scene.vertex_array);
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nkeynes@666 | 272 | glSecondaryColorPointerEXT(3, GL_UNSIGNED_BYTE, sizeof(struct vertex_struct), &pvr2_scene.vertex_array[0].offset_rgba );
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nkeynes@653 | 273 |
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nkeynes@653 | 274 | uint32_t bgplane_mode = MMIO_READ(PVR2, RENDER_BGPLANE);
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nkeynes@653 | 275 | uint32_t *bgplane = pvr2_scene.pvr2_pbuf + (((bgplane_mode & 0x00FFFFFF)) >> 3) ;
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nkeynes@653 | 276 | render_backplane( bgplane, pvr2_scene.buffer_width, pvr2_scene.buffer_height, bgplane_mode );
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nkeynes@653 | 277 |
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nkeynes@653 | 278 | glEnable( GL_SCISSOR_TEST );
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nkeynes@653 | 279 |
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nkeynes@653 | 280 | /* Process the segment list */
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nkeynes@653 | 281 | struct tile_segment *segment = pvr2_scene.segment_list;
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nkeynes@653 | 282 | do {
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nkeynes@653 | 283 | int tilex = SEGMENT_X(segment->control);
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nkeynes@653 | 284 | int tiley = SEGMENT_Y(segment->control);
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nkeynes@653 | 285 |
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nkeynes@653 | 286 | int tile_bounds[4] = { tilex << 5, (tilex+1)<<5, tiley<<5, (tiley+1)<<5 };
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nkeynes@653 | 287 | if( !clip_tile_bounds(tile_bounds, pvr2_scene.bounds) ) {
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nkeynes@653 | 288 | continue; // fully clipped, skip tile
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nkeynes@653 | 289 | }
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nkeynes@653 | 290 |
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nkeynes@653 | 291 | /* Clip to the visible part of the tile */
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nkeynes@653 | 292 | glScissor( tile_bounds[0], pvr2_scene.buffer_height-tile_bounds[3],
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nkeynes@653 | 293 | tile_bounds[1]-tile_bounds[0], tile_bounds[3] - tile_bounds[2] );
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nkeynes@653 | 294 | if( IS_TILE_PTR(segment->opaque_ptr) ) {
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nkeynes@653 | 295 | gl_render_tilelist(segment->opaque_ptr);
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nkeynes@653 | 296 | }
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nkeynes@653 | 297 | if( IS_TILE_PTR(segment->trans_ptr) ) {
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nkeynes@653 | 298 | if( pvr2_scene.sort_mode == SORT_NEVER ||
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nkeynes@653 | 299 | (pvr2_scene.sort_mode == SORT_TILEFLAG && (segment->control&SEGMENT_SORT_TRANS))) {
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nkeynes@653 | 300 | gl_render_tilelist(segment->trans_ptr);
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nkeynes@653 | 301 | } else {
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nkeynes@653 | 302 | render_autosort_tile(segment->trans_ptr, RENDER_NORMAL );
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nkeynes@653 | 303 | }
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nkeynes@653 | 304 | }
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nkeynes@653 | 305 | if( IS_TILE_PTR(segment->punchout_ptr) ) {
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nkeynes@653 | 306 | glEnable(GL_ALPHA_TEST );
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nkeynes@653 | 307 | render_autosort_tile(segment->punchout_ptr, RENDER_NORMAL );
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nkeynes@653 | 308 | glDisable(GL_ALPHA_TEST );
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nkeynes@653 | 309 | }
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nkeynes@653 | 310 | } while( !IS_LAST_SEGMENT(segment++) );
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nkeynes@653 | 311 | glDisable( GL_SCISSOR_TEST );
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nkeynes@653 | 312 |
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nkeynes@653 | 313 | gettimeofday( &end_tv, NULL );
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nkeynes@653 | 314 | ms = (end_tv.tv_sec - tex_tv.tv_sec) * 1000 +
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nkeynes@653 | 315 | (end_tv.tv_usec - tex_tv.tv_usec)/1000;
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nkeynes@653 | 316 | DEBUG( "Scene render in %dms", ms );
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nkeynes@653 | 317 | }
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