nkeynes@635 | 1 | /**
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nkeynes@635 | 2 | * $Id$
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nkeynes@635 | 3 | *
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nkeynes@635 | 4 | * Common GL code that doesn't depend on a specific implementation
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nkeynes@635 | 5 | *
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nkeynes@635 | 6 | * Copyright (c) 2005 Nathan Keynes.
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nkeynes@635 | 7 | *
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nkeynes@635 | 8 | * This program is free software; you can redistribute it and/or modify
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nkeynes@635 | 9 | * it under the terms of the GNU General Public License as published by
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nkeynes@635 | 10 | * the Free Software Foundation; either version 2 of the License, or
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nkeynes@635 | 11 | * (at your option) any later version.
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nkeynes@635 | 12 | *
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nkeynes@635 | 13 | * This program is distributed in the hope that it will be useful,
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nkeynes@635 | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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nkeynes@635 | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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nkeynes@635 | 16 | * GNU General Public License for more details.
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nkeynes@635 | 17 | */
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nkeynes@635 | 18 |
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nkeynes@635 | 19 | #include <sys/time.h>
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nkeynes@635 | 20 |
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nkeynes@635 | 21 | #include "display.h"
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nkeynes@635 | 22 | #include "pvr2/pvr2.h"
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nkeynes@1236 | 23 | #include "pvr2/glutil.h"
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nkeynes@1240 | 24 | #include "pvr2/shaders.h"
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nkeynes@635 | 25 | #include "drivers/video_gl.h"
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nkeynes@635 | 26 |
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nkeynes@1239 | 27 | /* FIXME: Need to actually handle this case */
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nkeynes@1239 | 28 | #ifndef GL_PACK_ROW_LENGTH
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nkeynes@1239 | 29 | #define glPixelStorei(key,val)
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nkeynes@1239 | 30 | #endif
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nkeynes@1239 | 31 |
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nkeynes@1236 | 32 | uint32_t video_width, video_height;
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nkeynes@1236 | 33 | struct video_vertex {
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nkeynes@1236 | 34 | float x,y;
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nkeynes@1236 | 35 | float u,v;
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nkeynes@1240 | 36 | float r,g,b,a;
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nkeynes@1236 | 37 | };
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nkeynes@1236 | 38 |
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nkeynes@1236 | 39 | static struct video_box_t {
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nkeynes@1236 | 40 | float viewMatrix[16];
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nkeynes@1236 | 41 | struct video_vertex gap1[4];
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nkeynes@1236 | 42 | struct video_vertex gap2[4];
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nkeynes@1236 | 43 | struct video_vertex video_view[4];
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nkeynes@1236 | 44 | struct video_vertex invert_view[4];
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nkeynes@1236 | 45 | } video_box;
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nkeynes@1236 | 46 |
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nkeynes@1251 | 47 | void gl_set_video_size( uint32_t width, uint32_t height, int flipped )
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nkeynes@1236 | 48 | {
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nkeynes@1236 | 49 | video_width = width;
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nkeynes@1236 | 50 | video_height = height;
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nkeynes@1236 | 51 |
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nkeynes@1236 | 52 | int x1=0,y1=0,x2=video_width,y2=video_height;
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nkeynes@1251 | 53 | int top = 0, bottom = 1;
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nkeynes@1251 | 54 |
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nkeynes@1251 | 55 | if( flipped ) {
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nkeynes@1251 | 56 | top = 1;
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nkeynes@1251 | 57 | bottom = 0;
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nkeynes@1251 | 58 | }
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nkeynes@1236 | 59 |
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nkeynes@1236 | 60 | int ah = video_width * 0.75;
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nkeynes@1236 | 61 |
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nkeynes@1236 | 62 | if( ah > video_height ) {
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nkeynes@1236 | 63 | int w = (video_height/0.75);
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nkeynes@1236 | 64 | x1 = (video_width - w)/2;
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nkeynes@1236 | 65 | x2 -= x1;
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nkeynes@1236 | 66 | video_box.gap1[0].x = 0; video_box.gap1[0].y = 0;
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nkeynes@1236 | 67 | video_box.gap1[1].x = x1; video_box.gap1[1].y = 0;
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nkeynes@1262 | 68 | video_box.gap1[2].x = x1; video_box.gap1[2].y = video_height;
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nkeynes@1259 | 69 | video_box.gap1[3].x = 0; video_box.gap1[3].y = video_height;
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nkeynes@1236 | 70 | video_box.gap2[0].x = x2; video_box.gap2[0].y = 0;
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nkeynes@1236 | 71 | video_box.gap2[1].x = video_width; video_box.gap2[1].y = 0;
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nkeynes@1259 | 72 | video_box.gap2[2].x = video_width; video_box.gap2[2].y = video_height;
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nkeynes@1259 | 73 | video_box.gap2[3].x = x2; video_box.gap2[3].y = video_height;
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nkeynes@1236 | 74 | } else if( ah < video_height ) {
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nkeynes@1236 | 75 | y1 = (video_height - ah)/2;
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nkeynes@1236 | 76 | y2 -= y1;
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nkeynes@1236 | 77 |
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nkeynes@1236 | 78 | video_box.gap1[0].x = 0; video_box.gap1[0].y = 0;
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nkeynes@1236 | 79 | video_box.gap1[1].x = video_width; video_box.gap1[1].y = 0;
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nkeynes@1259 | 80 | video_box.gap1[2].x = video_width; video_box.gap1[2].y = y1;
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nkeynes@1259 | 81 | video_box.gap1[3].x = 0; video_box.gap1[3].y = y1;
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nkeynes@1236 | 82 | video_box.gap2[0].x = 0; video_box.gap2[0].y = y2;
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nkeynes@1236 | 83 | video_box.gap2[1].x = video_width; video_box.gap2[1].y = y2;
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nkeynes@1259 | 84 | video_box.gap2[2].x = video_width; video_box.gap2[2].y = video_height;
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nkeynes@1259 | 85 | video_box.gap2[3].x = 0; video_box.gap2[3].y = video_height;
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nkeynes@1236 | 86 | }
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nkeynes@1236 | 87 |
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nkeynes@1236 | 88 | video_box.video_view[0].x = x1; video_box.video_view[0].y = y1;
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nkeynes@1259 | 89 | video_box.video_view[0].u = 0; video_box.video_view[0].v = top;
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nkeynes@1236 | 90 | video_box.video_view[1].x = x2; video_box.video_view[1].y = y1;
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nkeynes@1259 | 91 | video_box.video_view[1].u = 1; video_box.video_view[1].v = top;
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nkeynes@1259 | 92 | video_box.video_view[2].x = x2; video_box.video_view[2].y = y2;
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nkeynes@1259 | 93 | video_box.video_view[2].u = 1; video_box.video_view[2].v = bottom;
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nkeynes@1259 | 94 | video_box.video_view[3].x = x1; video_box.video_view[3].y = y2;
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nkeynes@1259 | 95 | video_box.video_view[3].u = 0; video_box.video_view[3].v = bottom;
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nkeynes@1236 | 96 |
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nkeynes@1236 | 97 | memcpy( &video_box.invert_view, &video_box.video_view, sizeof(video_box.video_view) );
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nkeynes@1251 | 98 | video_box.invert_view[0].v = bottom; video_box.invert_view[1].v = bottom;
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nkeynes@1251 | 99 | video_box.invert_view[2].v = top; video_box.invert_view[3].v = top;
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nkeynes@1236 | 100 |
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nkeynes@1236 | 101 | defineOrthoMatrix(video_box.viewMatrix, video_width, video_height, 0, 65535);
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nkeynes@1236 | 102 | }
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nkeynes@635 | 103 |
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nkeynes@1239 | 104 | #ifdef HAVE_OPENGL_FIXEDFUNC
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nkeynes@635 | 105 | /**
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nkeynes@1236 | 106 | * Setup the gl context for writes to the display output.
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nkeynes@635 | 107 | */
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nkeynes@1246 | 108 | void gl_framebuffer_setup()
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nkeynes@635 | 109 | {
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nkeynes@1239 | 110 | glViewport( 0, 0, video_width, video_height );
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nkeynes@1236 | 111 | glLoadMatrixf(video_box.viewMatrix);
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nkeynes@1236 | 112 | glBlendFunc( GL_ONE, GL_ZERO );
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nkeynes@1236 | 113 | glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE );
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nkeynes@1236 | 114 | glVertexPointer(2, GL_FLOAT, sizeof(struct video_vertex), &video_box.gap1[0].x);
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nkeynes@1236 | 115 | glColorPointer(3, GL_FLOAT, sizeof(struct video_vertex), &video_box.gap1[0].r);
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nkeynes@1236 | 116 | glTexCoordPointer(2, GL_FLOAT, sizeof(struct video_vertex), &video_box.gap1[0].u);
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nkeynes@1236 | 117 | glEnableClientState( GL_VERTEX_ARRAY );
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nkeynes@1236 | 118 | glEnableClientState( GL_COLOR_ARRAY );
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nkeynes@1236 | 119 | glEnableClientState( GL_TEXTURE_COORD_ARRAY );
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nkeynes@635 | 120 | }
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nkeynes@635 | 121 |
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nkeynes@1246 | 122 | void gl_framebuffer_cleanup()
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nkeynes@1240 | 123 | {
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nkeynes@1240 | 124 | glDisableClientState( GL_VERTEX_ARRAY );
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nkeynes@1240 | 125 | glDisableClientState( GL_COLOR_ARRAY );
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nkeynes@1240 | 126 | glDisableClientState( GL_TEXTURE_COORD_ARRAY );
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nkeynes@1240 | 127 | }
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nkeynes@1239 | 128 | #else
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nkeynes@1246 | 129 | void gl_framebuffer_setup()
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nkeynes@1239 | 130 | {
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nkeynes@1240 | 131 | glViewport( 0, 0, video_width, video_height );
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nkeynes@1240 | 132 | glBlendFunc( GL_ONE, GL_ZERO );
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nkeynes@1240 | 133 | glsl_use_basic_shader();
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nkeynes@1240 | 134 | glsl_set_basic_shader_view_matrix(video_box.viewMatrix);
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nkeynes@1240 | 135 | glsl_set_basic_shader_in_vertex_pointer(&video_box.gap1[0].x, sizeof(struct video_vertex));
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nkeynes@1240 | 136 | glsl_set_basic_shader_in_colour_pointer(&video_box.gap1[0].r, sizeof(struct video_vertex));
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nkeynes@1240 | 137 | glsl_set_basic_shader_in_texcoord_pointer(&video_box.gap1[0].u, sizeof(struct video_vertex));
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nkeynes@1240 | 138 | glsl_set_basic_shader_primary_texture(0);
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nkeynes@1240 | 139 | }
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nkeynes@1240 | 140 |
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nkeynes@1246 | 141 | void gl_framebuffer_cleanup()
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nkeynes@1240 | 142 | {
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nkeynes@1240 | 143 | glsl_clear_shader();
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nkeynes@1239 | 144 | }
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nkeynes@1239 | 145 | #endif
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nkeynes@1239 | 146 |
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nkeynes@635 | 147 | void gl_display_render_buffer( render_buffer_t buffer )
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nkeynes@635 | 148 | {
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nkeynes@635 | 149 | gl_texture_window( buffer->width, buffer->height, buffer->buf_id, buffer->inverted );
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nkeynes@635 | 150 | }
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nkeynes@635 | 151 |
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nkeynes@854 | 152 | /**
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nkeynes@854 | 153 | * Convert window coordinates to dreamcast device coords (640x480) using the
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nkeynes@854 | 154 | * same viewable area as gl_texture_window.
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nkeynes@854 | 155 | * If the coordinates are outside the viewable area, the result is -1,-1.
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nkeynes@854 | 156 | */
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nkeynes@854 | 157 | void gl_window_to_system_coords( int *x, int *y )
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nkeynes@854 | 158 | {
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nkeynes@854 | 159 | int x1=0,y1=0,x2=video_width,y2=video_height;
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nkeynes@854 | 160 |
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nkeynes@854 | 161 | int ah = video_width * 0.75;
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nkeynes@854 | 162 |
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nkeynes@854 | 163 | if( ah > video_height ) {
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nkeynes@854 | 164 | int w = (video_height/0.75);
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nkeynes@854 | 165 | x1 = (video_width - w)/2;
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nkeynes@854 | 166 | x2 -= x1;
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nkeynes@854 | 167 | } else if( ah < video_height ) {
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nkeynes@854 | 168 | y1 = (video_height - ah)/2;
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nkeynes@854 | 169 | y2 -= y1;
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nkeynes@854 | 170 | }
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nkeynes@854 | 171 | if( *x < x1 || *x >= x2 || *y < y1 || *y >= y2 ) {
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nkeynes@854 | 172 | *x = -1;
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nkeynes@854 | 173 | *y = -1;
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nkeynes@854 | 174 | } else {
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nkeynes@854 | 175 | *x = (*x - x1) * DISPLAY_WIDTH / (x2-x1);
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nkeynes@854 | 176 | *y = (*y - y1) * DISPLAY_HEIGHT / (y2-y1);
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nkeynes@854 | 177 | }
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nkeynes@854 | 178 | }
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nkeynes@854 | 179 |
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nkeynes@1259 | 180 | /**
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nkeynes@1259 | 181 | * Use quads if we have them, otherwise tri-fans.
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nkeynes@1259 | 182 | */
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nkeynes@1259 | 183 | #ifndef GL_QUADS
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nkeynes@1260 | 184 | #define GL_QUADS GL_TRIANGLE_FAN
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nkeynes@1259 | 185 | #endif
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nkeynes@1259 | 186 |
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nkeynes@635 | 187 | void gl_texture_window( int width, int height, int tex_id, gboolean inverted )
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nkeynes@635 | 188 | {
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nkeynes@1240 | 189 | /* Set video box tex alpha to 1 */
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nkeynes@1240 | 190 | video_box.video_view[0].a = video_box.video_view[1].a = video_box.video_view[2].a = video_box.video_view[3].a = 1;
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nkeynes@1251 | 191 | video_box.invert_view[0].a = video_box.invert_view[1].a = video_box.invert_view[2].a = video_box.invert_view[3].a = 1;
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nkeynes@1240 | 192 |
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nkeynes@635 | 193 | /* Reset display parameters */
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nkeynes@1236 | 194 | gl_framebuffer_setup();
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nkeynes@1259 | 195 | glDrawArrays(GL_QUADS, 0, 4);
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nkeynes@1259 | 196 | glDrawArrays(GL_QUADS, 4, 4);
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nkeynes@1236 | 197 | glEnable(GL_TEXTURE_2D);
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nkeynes@1236 | 198 | glBindTexture(GL_TEXTURE_2D,tex_id);
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nkeynes@1222 | 199 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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nkeynes@1222 | 200 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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nkeynes@1259 | 201 | glDrawArrays(GL_QUADS, inverted ? 12 : 8, 4);
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nkeynes@1236 | 202 | glDisable(GL_TEXTURE_2D);
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nkeynes@1251 | 203 | gl_framebuffer_cleanup();
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nkeynes@635 | 204 | glFlush();
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nkeynes@635 | 205 | }
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nkeynes@635 | 206 |
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nkeynes@635 | 207 | gboolean gl_load_frame_buffer( frame_buffer_t frame, int tex_id )
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nkeynes@635 | 208 | {
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nkeynes@635 | 209 | GLenum type = colour_formats[frame->colour_format].type;
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nkeynes@635 | 210 | GLenum format = colour_formats[frame->colour_format].format;
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nkeynes@635 | 211 | int bpp = colour_formats[frame->colour_format].bpp;
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nkeynes@635 | 212 | int rowstride = (frame->rowstride / bpp) - frame->width;
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nkeynes@736 | 213 |
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nkeynes@635 | 214 | glPixelStorei( GL_UNPACK_ROW_LENGTH, rowstride );
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nkeynes@1222 | 215 | glBindTexture( GL_TEXTURE_2D, tex_id );
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nkeynes@1222 | 216 | glTexSubImage2D( GL_TEXTURE_2D, 0, 0,0,
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nkeynes@736 | 217 | frame->width, frame->height, format, type, frame->data );
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nkeynes@1236 | 218 | glPixelStorei( GL_UNPACK_ROW_LENGTH, 0 );
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nkeynes@635 | 219 | return TRUE;
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nkeynes@635 | 220 | }
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nkeynes@635 | 221 |
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nkeynes@669 | 222 | void gl_display_blank( uint32_t colour )
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nkeynes@635 | 223 | {
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nkeynes@1236 | 224 | /* Set the video_box background colour */
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nkeynes@1236 | 225 | video_box.video_view[0].r = ((float)(((colour >> 16) & 0xFF) + 1)) / 256.0;
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nkeynes@1236 | 226 | video_box.video_view[0].g = ((float)(((colour >> 8) & 0xFF) + 1)) / 256.0;
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nkeynes@1236 | 227 | video_box.video_view[0].b = ((float)((colour & 0xFF) + 1)) / 256.0;
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nkeynes@1240 | 228 | video_box.video_view[0].a = 0;
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nkeynes@1236 | 229 | memcpy( &video_box.video_view[1].r, &video_box.video_view[0].r, sizeof(float)*3 );
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nkeynes@1236 | 230 | memcpy( &video_box.video_view[2].r, &video_box.video_view[0].r, sizeof(float)*3 );
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nkeynes@1236 | 231 | memcpy( &video_box.video_view[3].r, &video_box.video_view[0].r, sizeof(float)*3 );
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nkeynes@1236 | 232 |
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nkeynes@1236 | 233 | /* And render */
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nkeynes@1236 | 234 | gl_framebuffer_setup();
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nkeynes@1259 | 235 | glDrawArrays(GL_QUADS, 0, 4);
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nkeynes@1259 | 236 | glDrawArrays(GL_QUADS, 4, 4);
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nkeynes@1259 | 237 | glDrawArrays(GL_QUADS, 8, 4);
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nkeynes@1251 | 238 | gl_framebuffer_cleanup();
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nkeynes@635 | 239 | glFlush();
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nkeynes@635 | 240 | }
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nkeynes@635 | 241 |
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nkeynes@635 | 242 | /**
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nkeynes@635 | 243 | * Generic GL read_render_buffer. This function assumes that the caller
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nkeynes@635 | 244 | * has already set the appropriate glReadBuffer(); in other words, unless
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nkeynes@635 | 245 | * there's only one buffer this needs to be wrapped.
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nkeynes@635 | 246 | */
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nkeynes@635 | 247 | gboolean gl_read_render_buffer( unsigned char *target, render_buffer_t buffer,
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nkeynes@736 | 248 | int rowstride, int colour_format )
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nkeynes@635 | 249 | {
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nkeynes@635 | 250 | glFinish();
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nkeynes@635 | 251 | GLenum type = colour_formats[colour_format].type;
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nkeynes@635 | 252 | GLenum format = colour_formats[colour_format].format;
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nkeynes@635 | 253 | // int line_size = buffer->width * colour_formats[colour_format].bpp;
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nkeynes@635 | 254 | // int size = line_size * buffer->height;
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nkeynes@635 | 255 | int glrowstride = (rowstride / colour_formats[colour_format].bpp) - buffer->width;
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nkeynes@635 | 256 | glPixelStorei( GL_PACK_ROW_LENGTH, glrowstride );
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nkeynes@635 | 257 | glReadPixels( 0, 0, buffer->width, buffer->height, format, type, target );
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nkeynes@1236 | 258 | glPixelStorei( GL_PACK_ROW_LENGTH, 0 );
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nkeynes@635 | 259 | return TRUE;
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nkeynes@635 | 260 | }
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nkeynes@1244 | 261 |
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nkeynes@1258 | 262 | gboolean gl_init_driver( display_driver_t driver, gboolean need_fbo )
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nkeynes@1258 | 263 | {
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nkeynes@1258 | 264 | /* Use framebuffer objects if available */
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nkeynes@1258 | 265 | if( gl_fbo_is_supported() ) {
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nkeynes@1258 | 266 | gl_fbo_init(driver);
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nkeynes@1258 | 267 | } else if( need_fbo ) {
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nkeynes@1258 | 268 | ERROR( "Framebuffer objects not supported - unable to construct an off-screen buffer" );
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nkeynes@1258 | 269 | return FALSE;
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nkeynes@1258 | 270 | }
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nkeynes@1258 | 271 |
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nkeynes@1258 | 272 | /* Use SL shaders if available */
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nkeynes@1258 | 273 | gboolean have_shaders = glsl_init(driver);
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nkeynes@1258 | 274 | #ifndef HAVE_OPENGL_FIXEDFUNC
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nkeynes@1258 | 275 | if( !have_shaders ) { /* Shaders are required if we don't have fixed-functionality */
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nkeynes@1258 | 276 | gl_fbo_shutdown();
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nkeynes@1258 | 277 | return FALSE;
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nkeynes@1258 | 278 | }
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nkeynes@1258 | 279 | #endif
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nkeynes@1258 | 280 |
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nkeynes@1258 | 281 | /* Use vertex arrays, VBOs, etc, if we have them */
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nkeynes@1258 | 282 | gl_vbo_init(driver);
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nkeynes@1258 | 283 |
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nkeynes@1258 | 284 | driver->capabilities.has_gl = TRUE;
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nkeynes@1258 | 285 | return TRUE;
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nkeynes@1258 | 286 | }
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nkeynes@1258 | 287 |
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nkeynes@1244 | 288 | static gboolean video_gl_init();
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nkeynes@1244 | 289 |
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nkeynes@1244 | 290 | /**
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nkeynes@1244 | 291 | * Minimal GL driver (assuming that the GL context is already set up externally)
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nkeynes@1244 | 292 | * This requires FBO support (since otherwise we have no way to get a render buffer)
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nkeynes@1244 | 293 | */
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nkeynes@1244 | 294 | struct display_driver display_gl_driver = {
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nkeynes@1244 | 295 | "gl", N_("OpenGL driver"), video_gl_init, NULL,
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nkeynes@1244 | 296 | NULL, NULL, NULL,
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nkeynes@1244 | 297 | NULL, NULL, NULL, NULL,
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nkeynes@1244 | 298 | gl_load_frame_buffer, gl_display_render_buffer, gl_display_blank,
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nkeynes@1244 | 299 | NULL, gl_read_render_buffer, NULL, NULL
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nkeynes@1244 | 300 | };
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nkeynes@1244 | 301 |
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nkeynes@1244 | 302 | static gboolean video_gl_init()
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nkeynes@1244 | 303 | {
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nkeynes@1258 | 304 | return gl_init_driver(&display_gl_driver, TRUE);
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nkeynes@1244 | 305 | }
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