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@635 | 24 | #include "drivers/video_gl.h"
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nkeynes@635 | 25 |
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nkeynes@1239 | 26 | /* FIXME: Need to actually handle this case */
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nkeynes@1239 | 27 | #ifndef GL_PACK_ROW_LENGTH
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nkeynes@1239 | 28 | #define glPixelStorei(key,val)
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nkeynes@1239 | 29 | #endif
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nkeynes@1239 | 30 |
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nkeynes@1236 | 31 | uint32_t video_width, video_height;
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nkeynes@1236 | 32 | struct video_vertex {
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nkeynes@1236 | 33 | float x,y;
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nkeynes@1236 | 34 | float u,v;
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nkeynes@1236 | 35 | float r,g,b;
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nkeynes@1236 | 36 | };
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nkeynes@1236 | 37 |
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nkeynes@1236 | 38 | static struct video_box_t {
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nkeynes@1236 | 39 | float viewMatrix[16];
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nkeynes@1236 | 40 | struct video_vertex gap1[4];
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nkeynes@1236 | 41 | struct video_vertex gap2[4];
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nkeynes@1236 | 42 | struct video_vertex video_view[4];
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nkeynes@1236 | 43 | struct video_vertex invert_view[4];
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nkeynes@1236 | 44 | } video_box;
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nkeynes@1236 | 45 |
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nkeynes@1236 | 46 | void gl_set_video_size( uint32_t width, uint32_t height )
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nkeynes@1236 | 47 | {
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nkeynes@1236 | 48 | video_width = width;
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nkeynes@1236 | 49 | video_height = height;
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nkeynes@1236 | 50 |
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nkeynes@1236 | 51 | int x1=0,y1=0,x2=video_width,y2=video_height;
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nkeynes@1236 | 52 |
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nkeynes@1236 | 53 | int ah = video_width * 0.75;
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nkeynes@1236 | 54 |
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nkeynes@1236 | 55 | if( ah > video_height ) {
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nkeynes@1236 | 56 | int w = (video_height/0.75);
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nkeynes@1236 | 57 | x1 = (video_width - w)/2;
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nkeynes@1236 | 58 | x2 -= x1;
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nkeynes@1236 | 59 | video_box.gap1[0].x = 0; video_box.gap1[0].y = 0;
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nkeynes@1236 | 60 | video_box.gap1[1].x = x1; video_box.gap1[1].y = 0;
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nkeynes@1236 | 61 | video_box.gap1[2].x = 0; video_box.gap1[2].y = video_height;
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nkeynes@1236 | 62 | video_box.gap1[3].x = x2; video_box.gap1[3].y = video_height;
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nkeynes@1236 | 63 | video_box.gap2[0].x = x2; video_box.gap2[0].y = 0;
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nkeynes@1236 | 64 | video_box.gap2[1].x = video_width; video_box.gap2[1].y = 0;
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nkeynes@1236 | 65 | video_box.gap2[2].x = x2; video_box.gap2[2].y = video_height;
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nkeynes@1236 | 66 | video_box.gap2[3].x = video_width; video_box.gap2[3].y = video_height;
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nkeynes@1236 | 67 | } else if( ah < video_height ) {
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nkeynes@1236 | 68 | y1 = (video_height - ah)/2;
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nkeynes@1236 | 69 | y2 -= y1;
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nkeynes@1236 | 70 |
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nkeynes@1236 | 71 | video_box.gap1[0].x = 0; video_box.gap1[0].y = 0;
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nkeynes@1236 | 72 | video_box.gap1[1].x = video_width; video_box.gap1[1].y = 0;
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nkeynes@1236 | 73 | video_box.gap1[2].x = 0; video_box.gap1[2].y = y1;
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nkeynes@1236 | 74 | video_box.gap1[3].x = video_width; video_box.gap1[3].y = y1;
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nkeynes@1236 | 75 | video_box.gap2[0].x = 0; video_box.gap2[0].y = y2;
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nkeynes@1236 | 76 | video_box.gap2[1].x = video_width; video_box.gap2[1].y = y2;
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nkeynes@1236 | 77 | video_box.gap2[2].x = 0; video_box.gap2[2].y = video_height;
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nkeynes@1236 | 78 | video_box.gap2[3].x = video_width; video_box.gap2[3].y = video_height;
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nkeynes@1236 | 79 | }
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nkeynes@1236 | 80 |
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nkeynes@1236 | 81 | video_box.video_view[0].x = x1; video_box.video_view[0].y = y1;
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nkeynes@1236 | 82 | video_box.video_view[0].u = 0; video_box.video_view[0].v = 0;
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nkeynes@1236 | 83 | video_box.video_view[1].x = x2; video_box.video_view[1].y = y1;
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nkeynes@1236 | 84 | video_box.video_view[1].u = 1; video_box.video_view[1].v = 0;
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nkeynes@1236 | 85 | video_box.video_view[2].x = x1; video_box.video_view[2].y = y2;
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nkeynes@1236 | 86 | video_box.video_view[2].u = 0; video_box.video_view[2].v = 1;
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nkeynes@1236 | 87 | video_box.video_view[3].x = x2; video_box.video_view[3].y = y2;
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nkeynes@1236 | 88 | video_box.video_view[3].u = 1; video_box.video_view[3].v = 1;
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nkeynes@1236 | 89 |
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nkeynes@1236 | 90 | memcpy( &video_box.invert_view, &video_box.video_view, sizeof(video_box.video_view) );
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nkeynes@1236 | 91 | video_box.invert_view[0].v = 1; video_box.invert_view[1].v = 1;
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nkeynes@1236 | 92 | video_box.invert_view[2].v = 0; video_box.invert_view[3].v = 0;
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nkeynes@1236 | 93 |
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nkeynes@1236 | 94 | defineOrthoMatrix(video_box.viewMatrix, video_width, video_height, 0, 65535);
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nkeynes@1236 | 95 | }
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nkeynes@635 | 96 |
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nkeynes@1239 | 97 | #ifdef HAVE_OPENGL_FIXEDFUNC
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nkeynes@635 | 98 | /**
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nkeynes@1236 | 99 | * Setup the gl context for writes to the display output.
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nkeynes@635 | 100 | */
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nkeynes@1236 | 101 | void gl_framebuffer_setup()
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nkeynes@635 | 102 | {
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nkeynes@1239 | 103 | glViewport( 0, 0, video_width, video_height );
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nkeynes@1236 | 104 | glLoadMatrixf(video_box.viewMatrix);
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nkeynes@1236 | 105 | glBlendFunc( GL_ONE, GL_ZERO );
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nkeynes@1236 | 106 | glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE );
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nkeynes@1236 | 107 | glVertexPointer(2, GL_FLOAT, sizeof(struct video_vertex), &video_box.gap1[0].x);
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nkeynes@1236 | 108 | glColorPointer(3, GL_FLOAT, sizeof(struct video_vertex), &video_box.gap1[0].r);
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nkeynes@1236 | 109 | glTexCoordPointer(2, GL_FLOAT, sizeof(struct video_vertex), &video_box.gap1[0].u);
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nkeynes@1236 | 110 | glEnableClientState( GL_VERTEX_ARRAY );
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nkeynes@1236 | 111 | glEnableClientState( GL_COLOR_ARRAY );
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nkeynes@1236 | 112 | glEnableClientState( GL_TEXTURE_COORD_ARRAY );
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nkeynes@635 | 113 | }
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nkeynes@635 | 114 |
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nkeynes@1239 | 115 | #else
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nkeynes@1239 | 116 | void gl_framebuffer_setup()
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nkeynes@1239 | 117 | {
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nkeynes@1239 | 118 | /* TODO */
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nkeynes@1239 | 119 | }
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nkeynes@1239 | 120 | #endif
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nkeynes@1239 | 121 |
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nkeynes@635 | 122 | void gl_display_render_buffer( render_buffer_t buffer )
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nkeynes@635 | 123 | {
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nkeynes@635 | 124 | gl_texture_window( buffer->width, buffer->height, buffer->buf_id, buffer->inverted );
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nkeynes@635 | 125 | }
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nkeynes@635 | 126 |
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nkeynes@854 | 127 | /**
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nkeynes@854 | 128 | * Convert window coordinates to dreamcast device coords (640x480) using the
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nkeynes@854 | 129 | * same viewable area as gl_texture_window.
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nkeynes@854 | 130 | * If the coordinates are outside the viewable area, the result is -1,-1.
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nkeynes@854 | 131 | */
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nkeynes@854 | 132 | void gl_window_to_system_coords( int *x, int *y )
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nkeynes@854 | 133 | {
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nkeynes@854 | 134 | int x1=0,y1=0,x2=video_width,y2=video_height;
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nkeynes@854 | 135 |
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nkeynes@854 | 136 | int ah = video_width * 0.75;
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nkeynes@854 | 137 |
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nkeynes@854 | 138 | if( ah > video_height ) {
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nkeynes@854 | 139 | int w = (video_height/0.75);
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nkeynes@854 | 140 | x1 = (video_width - w)/2;
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nkeynes@854 | 141 | x2 -= x1;
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nkeynes@854 | 142 | } else if( ah < video_height ) {
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nkeynes@854 | 143 | y1 = (video_height - ah)/2;
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nkeynes@854 | 144 | y2 -= y1;
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nkeynes@854 | 145 | }
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nkeynes@854 | 146 | if( *x < x1 || *x >= x2 || *y < y1 || *y >= y2 ) {
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nkeynes@854 | 147 | *x = -1;
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nkeynes@854 | 148 | *y = -1;
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nkeynes@854 | 149 | } else {
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nkeynes@854 | 150 | *x = (*x - x1) * DISPLAY_WIDTH / (x2-x1);
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nkeynes@854 | 151 | *y = (*y - y1) * DISPLAY_HEIGHT / (y2-y1);
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nkeynes@854 | 152 | }
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nkeynes@854 | 153 | }
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nkeynes@854 | 154 |
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nkeynes@635 | 155 | void gl_texture_window( int width, int height, int tex_id, gboolean inverted )
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nkeynes@635 | 156 | {
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nkeynes@635 | 157 | /* Reset display parameters */
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nkeynes@1236 | 158 | gl_framebuffer_setup();
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nkeynes@1236 | 159 | glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
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nkeynes@1236 | 160 | glDrawArrays(GL_TRIANGLE_STRIP, 4, 4);
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nkeynes@1236 | 161 | glEnable(GL_TEXTURE_2D);
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nkeynes@1236 | 162 | glBindTexture(GL_TEXTURE_2D,tex_id);
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nkeynes@1222 | 163 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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nkeynes@1222 | 164 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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nkeynes@1236 | 165 | glDrawArrays(GL_TRIANGLE_STRIP, inverted ? 12 : 8, 4);
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nkeynes@1236 | 166 | glDisable(GL_TEXTURE_2D);
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nkeynes@635 | 167 | glFlush();
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nkeynes@635 | 168 | }
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nkeynes@635 | 169 |
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nkeynes@635 | 170 | gboolean gl_load_frame_buffer( frame_buffer_t frame, int tex_id )
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nkeynes@635 | 171 | {
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nkeynes@635 | 172 | GLenum type = colour_formats[frame->colour_format].type;
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nkeynes@635 | 173 | GLenum format = colour_formats[frame->colour_format].format;
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nkeynes@635 | 174 | int bpp = colour_formats[frame->colour_format].bpp;
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nkeynes@635 | 175 | int rowstride = (frame->rowstride / bpp) - frame->width;
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nkeynes@736 | 176 |
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nkeynes@635 | 177 | glPixelStorei( GL_UNPACK_ROW_LENGTH, rowstride );
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nkeynes@1222 | 178 | glBindTexture( GL_TEXTURE_2D, tex_id );
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nkeynes@1222 | 179 | glTexSubImage2D( GL_TEXTURE_2D, 0, 0,0,
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nkeynes@736 | 180 | frame->width, frame->height, format, type, frame->data );
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nkeynes@1236 | 181 | glPixelStorei( GL_UNPACK_ROW_LENGTH, 0 );
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nkeynes@635 | 182 | return TRUE;
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nkeynes@635 | 183 | }
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nkeynes@635 | 184 |
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nkeynes@669 | 185 | void gl_display_blank( uint32_t colour )
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nkeynes@635 | 186 | {
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nkeynes@1236 | 187 | /* Set the video_box background colour */
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nkeynes@1236 | 188 | video_box.video_view[0].r = ((float)(((colour >> 16) & 0xFF) + 1)) / 256.0;
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nkeynes@1236 | 189 | video_box.video_view[0].g = ((float)(((colour >> 8) & 0xFF) + 1)) / 256.0;
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nkeynes@1236 | 190 | video_box.video_view[0].b = ((float)((colour & 0xFF) + 1)) / 256.0;
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nkeynes@1236 | 191 | memcpy( &video_box.video_view[1].r, &video_box.video_view[0].r, sizeof(float)*3 );
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nkeynes@1236 | 192 | memcpy( &video_box.video_view[2].r, &video_box.video_view[0].r, sizeof(float)*3 );
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nkeynes@1236 | 193 | memcpy( &video_box.video_view[3].r, &video_box.video_view[0].r, sizeof(float)*3 );
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nkeynes@1236 | 194 |
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nkeynes@1236 | 195 | /* And render */
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nkeynes@1236 | 196 | gl_framebuffer_setup();
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nkeynes@1236 | 197 | glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
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nkeynes@1236 | 198 | glDrawArrays(GL_TRIANGLE_STRIP, 4, 4);
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nkeynes@1236 | 199 | glDrawArrays(GL_TRIANGLE_STRIP, 8, 4);
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nkeynes@635 | 200 | glFlush();
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nkeynes@635 | 201 | }
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nkeynes@635 | 202 |
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nkeynes@635 | 203 | /**
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nkeynes@635 | 204 | * Generic GL read_render_buffer. This function assumes that the caller
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nkeynes@635 | 205 | * has already set the appropriate glReadBuffer(); in other words, unless
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nkeynes@635 | 206 | * there's only one buffer this needs to be wrapped.
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nkeynes@635 | 207 | */
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nkeynes@635 | 208 | gboolean gl_read_render_buffer( unsigned char *target, render_buffer_t buffer,
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nkeynes@736 | 209 | int rowstride, int colour_format )
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nkeynes@635 | 210 | {
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nkeynes@635 | 211 | glFinish();
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nkeynes@635 | 212 | GLenum type = colour_formats[colour_format].type;
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nkeynes@635 | 213 | GLenum format = colour_formats[colour_format].format;
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nkeynes@635 | 214 | // int line_size = buffer->width * colour_formats[colour_format].bpp;
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nkeynes@635 | 215 | // int size = line_size * buffer->height;
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nkeynes@635 | 216 | int glrowstride = (rowstride / colour_formats[colour_format].bpp) - buffer->width;
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nkeynes@635 | 217 | glPixelStorei( GL_PACK_ROW_LENGTH, glrowstride );
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nkeynes@635 | 218 | glReadPixels( 0, 0, buffer->width, buffer->height, format, type, target );
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nkeynes@1236 | 219 | glPixelStorei( GL_PACK_ROW_LENGTH, 0 );
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nkeynes@635 | 220 | return TRUE;
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nkeynes@635 | 221 | }
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