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@1236 | 47 | void gl_set_video_size( uint32_t width, uint32_t height )
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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@1236 | 53 |
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nkeynes@1236 | 54 | int ah = video_width * 0.75;
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nkeynes@1236 | 55 |
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nkeynes@1236 | 56 | if( ah > video_height ) {
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nkeynes@1236 | 57 | int w = (video_height/0.75);
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nkeynes@1236 | 58 | x1 = (video_width - w)/2;
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nkeynes@1236 | 59 | x2 -= x1;
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nkeynes@1236 | 60 | video_box.gap1[0].x = 0; video_box.gap1[0].y = 0;
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nkeynes@1236 | 61 | video_box.gap1[1].x = x1; video_box.gap1[1].y = 0;
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nkeynes@1236 | 62 | video_box.gap1[2].x = 0; video_box.gap1[2].y = video_height;
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nkeynes@1236 | 63 | video_box.gap1[3].x = x2; video_box.gap1[3].y = video_height;
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nkeynes@1236 | 64 | video_box.gap2[0].x = x2; video_box.gap2[0].y = 0;
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nkeynes@1236 | 65 | video_box.gap2[1].x = video_width; video_box.gap2[1].y = 0;
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nkeynes@1236 | 66 | video_box.gap2[2].x = x2; video_box.gap2[2].y = video_height;
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nkeynes@1236 | 67 | video_box.gap2[3].x = video_width; video_box.gap2[3].y = video_height;
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nkeynes@1236 | 68 | } else if( ah < video_height ) {
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nkeynes@1236 | 69 | y1 = (video_height - ah)/2;
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nkeynes@1236 | 70 | y2 -= y1;
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nkeynes@1236 | 71 |
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nkeynes@1236 | 72 | video_box.gap1[0].x = 0; video_box.gap1[0].y = 0;
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nkeynes@1236 | 73 | video_box.gap1[1].x = video_width; video_box.gap1[1].y = 0;
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nkeynes@1236 | 74 | video_box.gap1[2].x = 0; video_box.gap1[2].y = y1;
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nkeynes@1236 | 75 | video_box.gap1[3].x = video_width; video_box.gap1[3].y = y1;
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nkeynes@1236 | 76 | video_box.gap2[0].x = 0; video_box.gap2[0].y = y2;
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nkeynes@1236 | 77 | video_box.gap2[1].x = video_width; video_box.gap2[1].y = y2;
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nkeynes@1236 | 78 | video_box.gap2[2].x = 0; video_box.gap2[2].y = video_height;
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nkeynes@1236 | 79 | video_box.gap2[3].x = video_width; video_box.gap2[3].y = video_height;
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nkeynes@1236 | 80 | }
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nkeynes@1236 | 81 |
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nkeynes@1236 | 82 | video_box.video_view[0].x = x1; video_box.video_view[0].y = y1;
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nkeynes@1236 | 83 | video_box.video_view[0].u = 0; video_box.video_view[0].v = 0;
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nkeynes@1236 | 84 | video_box.video_view[1].x = x2; video_box.video_view[1].y = y1;
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nkeynes@1236 | 85 | video_box.video_view[1].u = 1; video_box.video_view[1].v = 0;
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nkeynes@1236 | 86 | video_box.video_view[2].x = x1; video_box.video_view[2].y = y2;
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nkeynes@1236 | 87 | video_box.video_view[2].u = 0; video_box.video_view[2].v = 1;
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nkeynes@1236 | 88 | video_box.video_view[3].x = x2; video_box.video_view[3].y = y2;
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nkeynes@1236 | 89 | video_box.video_view[3].u = 1; video_box.video_view[3].v = 1;
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nkeynes@1236 | 90 |
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nkeynes@1236 | 91 | memcpy( &video_box.invert_view, &video_box.video_view, sizeof(video_box.video_view) );
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nkeynes@1236 | 92 | video_box.invert_view[0].v = 1; video_box.invert_view[1].v = 1;
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nkeynes@1236 | 93 | video_box.invert_view[2].v = 0; video_box.invert_view[3].v = 0;
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nkeynes@1236 | 94 |
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nkeynes@1236 | 95 | defineOrthoMatrix(video_box.viewMatrix, video_width, video_height, 0, 65535);
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nkeynes@1236 | 96 | }
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nkeynes@635 | 97 |
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nkeynes@1239 | 98 | #ifdef HAVE_OPENGL_FIXEDFUNC
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nkeynes@635 | 99 | /**
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nkeynes@1236 | 100 | * Setup the gl context for writes to the display output.
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nkeynes@635 | 101 | */
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nkeynes@1240 | 102 | static void gl_framebuffer_setup()
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nkeynes@635 | 103 | {
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nkeynes@1239 | 104 | glViewport( 0, 0, video_width, video_height );
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nkeynes@1236 | 105 | glLoadMatrixf(video_box.viewMatrix);
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nkeynes@1236 | 106 | glBlendFunc( GL_ONE, GL_ZERO );
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nkeynes@1236 | 107 | glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE );
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nkeynes@1236 | 108 | glVertexPointer(2, GL_FLOAT, sizeof(struct video_vertex), &video_box.gap1[0].x);
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nkeynes@1236 | 109 | glColorPointer(3, GL_FLOAT, sizeof(struct video_vertex), &video_box.gap1[0].r);
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nkeynes@1236 | 110 | glTexCoordPointer(2, GL_FLOAT, sizeof(struct video_vertex), &video_box.gap1[0].u);
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nkeynes@1236 | 111 | glEnableClientState( GL_VERTEX_ARRAY );
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nkeynes@1236 | 112 | glEnableClientState( GL_COLOR_ARRAY );
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nkeynes@1236 | 113 | glEnableClientState( GL_TEXTURE_COORD_ARRAY );
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nkeynes@635 | 114 | }
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nkeynes@635 | 115 |
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nkeynes@1240 | 116 | static void gl_framebuffer_cleanup()
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nkeynes@1240 | 117 | {
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nkeynes@1240 | 118 | glDisableClientState( GL_VERTEX_ARRAY );
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nkeynes@1240 | 119 | glDisableClientState( GL_COLOR_ARRAY );
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nkeynes@1240 | 120 | glDisableClientState( GL_TEXTURE_COORD_ARRAY );
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nkeynes@1240 | 121 | }
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nkeynes@1239 | 122 | #else
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nkeynes@1240 | 123 | static void gl_framebuffer_setup()
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nkeynes@1239 | 124 | {
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nkeynes@1240 | 125 | glViewport( 0, 0, video_width, video_height );
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nkeynes@1240 | 126 | glBlendFunc( GL_ONE, GL_ZERO );
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nkeynes@1240 | 127 | glsl_use_basic_shader();
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nkeynes@1240 | 128 | glsl_set_basic_shader_view_matrix(video_box.viewMatrix);
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nkeynes@1240 | 129 | glsl_set_basic_shader_in_vertex_pointer(&video_box.gap1[0].x, sizeof(struct video_vertex));
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nkeynes@1240 | 130 | glsl_set_basic_shader_in_colour_pointer(&video_box.gap1[0].r, sizeof(struct video_vertex));
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nkeynes@1240 | 131 | glsl_set_basic_shader_in_texcoord_pointer(&video_box.gap1[0].u, sizeof(struct video_vertex));
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nkeynes@1240 | 132 | glsl_set_basic_shader_primary_texture(0);
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nkeynes@1240 | 133 | }
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nkeynes@1240 | 134 |
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nkeynes@1240 | 135 | static void gl_framebuffer_cleanup()
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nkeynes@1240 | 136 | {
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nkeynes@1240 | 137 | glsl_clear_shader();
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nkeynes@1239 | 138 | }
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nkeynes@1239 | 139 | #endif
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nkeynes@1239 | 140 |
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nkeynes@635 | 141 | void gl_display_render_buffer( render_buffer_t buffer )
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nkeynes@635 | 142 | {
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nkeynes@635 | 143 | gl_texture_window( buffer->width, buffer->height, buffer->buf_id, buffer->inverted );
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nkeynes@635 | 144 | }
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nkeynes@635 | 145 |
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nkeynes@854 | 146 | /**
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nkeynes@854 | 147 | * Convert window coordinates to dreamcast device coords (640x480) using the
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nkeynes@854 | 148 | * same viewable area as gl_texture_window.
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nkeynes@854 | 149 | * If the coordinates are outside the viewable area, the result is -1,-1.
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nkeynes@854 | 150 | */
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nkeynes@854 | 151 | void gl_window_to_system_coords( int *x, int *y )
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nkeynes@854 | 152 | {
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nkeynes@854 | 153 | int x1=0,y1=0,x2=video_width,y2=video_height;
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nkeynes@854 | 154 |
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nkeynes@854 | 155 | int ah = video_width * 0.75;
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nkeynes@854 | 156 |
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nkeynes@854 | 157 | if( ah > video_height ) {
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nkeynes@854 | 158 | int w = (video_height/0.75);
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nkeynes@854 | 159 | x1 = (video_width - w)/2;
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nkeynes@854 | 160 | x2 -= x1;
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nkeynes@854 | 161 | } else if( ah < video_height ) {
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nkeynes@854 | 162 | y1 = (video_height - ah)/2;
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nkeynes@854 | 163 | y2 -= y1;
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nkeynes@854 | 164 | }
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nkeynes@854 | 165 | if( *x < x1 || *x >= x2 || *y < y1 || *y >= y2 ) {
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nkeynes@854 | 166 | *x = -1;
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nkeynes@854 | 167 | *y = -1;
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nkeynes@854 | 168 | } else {
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nkeynes@854 | 169 | *x = (*x - x1) * DISPLAY_WIDTH / (x2-x1);
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nkeynes@854 | 170 | *y = (*y - y1) * DISPLAY_HEIGHT / (y2-y1);
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nkeynes@854 | 171 | }
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nkeynes@854 | 172 | }
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nkeynes@854 | 173 |
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nkeynes@635 | 174 | void gl_texture_window( int width, int height, int tex_id, gboolean inverted )
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nkeynes@635 | 175 | {
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nkeynes@1240 | 176 | /* Set video box tex alpha to 1 */
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nkeynes@1240 | 177 | 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@1240 | 178 |
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nkeynes@635 | 179 | /* Reset display parameters */
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nkeynes@1236 | 180 | gl_framebuffer_setup();
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nkeynes@1236 | 181 | glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
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nkeynes@1236 | 182 | glDrawArrays(GL_TRIANGLE_STRIP, 4, 4);
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nkeynes@1236 | 183 | glEnable(GL_TEXTURE_2D);
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nkeynes@1236 | 184 | glBindTexture(GL_TEXTURE_2D,tex_id);
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nkeynes@1222 | 185 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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nkeynes@1222 | 186 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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nkeynes@1236 | 187 | glDrawArrays(GL_TRIANGLE_STRIP, inverted ? 12 : 8, 4);
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nkeynes@1236 | 188 | glDisable(GL_TEXTURE_2D);
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nkeynes@635 | 189 | glFlush();
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nkeynes@1240 | 190 | gl_framebuffer_cleanup();
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nkeynes@635 | 191 | }
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nkeynes@635 | 192 |
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nkeynes@635 | 193 | gboolean gl_load_frame_buffer( frame_buffer_t frame, int tex_id )
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nkeynes@635 | 194 | {
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nkeynes@635 | 195 | GLenum type = colour_formats[frame->colour_format].type;
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nkeynes@635 | 196 | GLenum format = colour_formats[frame->colour_format].format;
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nkeynes@635 | 197 | int bpp = colour_formats[frame->colour_format].bpp;
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nkeynes@635 | 198 | int rowstride = (frame->rowstride / bpp) - frame->width;
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nkeynes@736 | 199 |
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nkeynes@635 | 200 | glPixelStorei( GL_UNPACK_ROW_LENGTH, rowstride );
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nkeynes@1222 | 201 | glBindTexture( GL_TEXTURE_2D, tex_id );
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nkeynes@1222 | 202 | glTexSubImage2D( GL_TEXTURE_2D, 0, 0,0,
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nkeynes@736 | 203 | frame->width, frame->height, format, type, frame->data );
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nkeynes@1236 | 204 | glPixelStorei( GL_UNPACK_ROW_LENGTH, 0 );
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nkeynes@635 | 205 | return TRUE;
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nkeynes@635 | 206 | }
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nkeynes@635 | 207 |
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nkeynes@669 | 208 | void gl_display_blank( uint32_t colour )
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nkeynes@635 | 209 | {
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nkeynes@1236 | 210 | /* Set the video_box background colour */
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nkeynes@1236 | 211 | video_box.video_view[0].r = ((float)(((colour >> 16) & 0xFF) + 1)) / 256.0;
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nkeynes@1236 | 212 | video_box.video_view[0].g = ((float)(((colour >> 8) & 0xFF) + 1)) / 256.0;
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nkeynes@1236 | 213 | video_box.video_view[0].b = ((float)((colour & 0xFF) + 1)) / 256.0;
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nkeynes@1240 | 214 | video_box.video_view[0].a = 0;
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nkeynes@1236 | 215 | memcpy( &video_box.video_view[1].r, &video_box.video_view[0].r, sizeof(float)*3 );
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nkeynes@1236 | 216 | memcpy( &video_box.video_view[2].r, &video_box.video_view[0].r, sizeof(float)*3 );
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nkeynes@1236 | 217 | memcpy( &video_box.video_view[3].r, &video_box.video_view[0].r, sizeof(float)*3 );
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nkeynes@1236 | 218 |
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nkeynes@1236 | 219 | /* And render */
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nkeynes@1236 | 220 | gl_framebuffer_setup();
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nkeynes@1236 | 221 | glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
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nkeynes@1236 | 222 | glDrawArrays(GL_TRIANGLE_STRIP, 4, 4);
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nkeynes@1236 | 223 | glDrawArrays(GL_TRIANGLE_STRIP, 8, 4);
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nkeynes@635 | 224 | glFlush();
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nkeynes@1240 | 225 | gl_framebuffer_cleanup();
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nkeynes@635 | 226 | }
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nkeynes@635 | 227 |
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nkeynes@635 | 228 | /**
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nkeynes@635 | 229 | * Generic GL read_render_buffer. This function assumes that the caller
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nkeynes@635 | 230 | * has already set the appropriate glReadBuffer(); in other words, unless
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nkeynes@635 | 231 | * there's only one buffer this needs to be wrapped.
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nkeynes@635 | 232 | */
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nkeynes@635 | 233 | gboolean gl_read_render_buffer( unsigned char *target, render_buffer_t buffer,
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nkeynes@736 | 234 | int rowstride, int colour_format )
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nkeynes@635 | 235 | {
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nkeynes@635 | 236 | glFinish();
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nkeynes@635 | 237 | GLenum type = colour_formats[colour_format].type;
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nkeynes@635 | 238 | GLenum format = colour_formats[colour_format].format;
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nkeynes@635 | 239 | // int line_size = buffer->width * colour_formats[colour_format].bpp;
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nkeynes@635 | 240 | // int size = line_size * buffer->height;
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nkeynes@635 | 241 | int glrowstride = (rowstride / colour_formats[colour_format].bpp) - buffer->width;
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nkeynes@635 | 242 | glPixelStorei( GL_PACK_ROW_LENGTH, glrowstride );
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nkeynes@635 | 243 | glReadPixels( 0, 0, buffer->width, buffer->height, format, type, target );
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nkeynes@1236 | 244 | glPixelStorei( GL_PACK_ROW_LENGTH, 0 );
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nkeynes@635 | 245 | return TRUE;
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nkeynes@635 | 246 | }
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