filename | src/drivers/video_gl.c |
changeset | 854:130928a3cdcb |
prev | 736:a02d1475ccfd |
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author | nkeynes |
date | Sat Jun 13 07:12:51 2009 +0000 (14 years ago) |
permissions | -rw-r--r-- |
last change | Load plugins from the directory containing the executable first if they're there - simplifies development testing. Add dummy plugin for easy identification of the plugin directory |
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nkeynes@635 | 1 | /** |
nkeynes@635 | 2 | * $Id$ |
nkeynes@635 | 3 | * |
nkeynes@635 | 4 | * Common GL code that doesn't depend on a specific implementation |
nkeynes@635 | 5 | * |
nkeynes@635 | 6 | * Copyright (c) 2005 Nathan Keynes. |
nkeynes@635 | 7 | * |
nkeynes@635 | 8 | * This program is free software; you can redistribute it and/or modify |
nkeynes@635 | 9 | * it under the terms of the GNU General Public License as published by |
nkeynes@635 | 10 | * the Free Software Foundation; either version 2 of the License, or |
nkeynes@635 | 11 | * (at your option) any later version. |
nkeynes@635 | 12 | * |
nkeynes@635 | 13 | * This program is distributed in the hope that it will be useful, |
nkeynes@635 | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
nkeynes@635 | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
nkeynes@635 | 16 | * GNU General Public License for more details. |
nkeynes@635 | 17 | */ |
nkeynes@635 | 18 | |
nkeynes@635 | 19 | #include <sys/time.h> |
nkeynes@635 | 20 | |
nkeynes@635 | 21 | #include "display.h" |
nkeynes@635 | 22 | #include "pvr2/pvr2.h" |
nkeynes@635 | 23 | #include "drivers/video_gl.h" |
nkeynes@635 | 24 | |
nkeynes@635 | 25 | extern uint32_t video_width, video_height; |
nkeynes@635 | 26 | |
nkeynes@635 | 27 | /** |
nkeynes@635 | 28 | * Reset the gl state to simple orthographic projection with |
nkeynes@635 | 29 | * texturing, alpha/depth/scissor/cull tests disabled. |
nkeynes@635 | 30 | */ |
nkeynes@635 | 31 | void gl_reset_state() |
nkeynes@635 | 32 | { |
nkeynes@635 | 33 | glViewport( 0, 0, video_width, video_height ); |
nkeynes@635 | 34 | glMatrixMode(GL_PROJECTION); |
nkeynes@635 | 35 | glLoadIdentity(); |
nkeynes@635 | 36 | glOrtho( 0, video_width, video_height, 0, 0, 65535 ); |
nkeynes@635 | 37 | glMatrixMode(GL_MODELVIEW); |
nkeynes@635 | 38 | glLoadIdentity(); |
nkeynes@681 | 39 | glEnable( GL_BLEND ); |
nkeynes@635 | 40 | glDisable( GL_TEXTURE_2D ); |
nkeynes@681 | 41 | glDisable( GL_TEXTURE_RECTANGLE_ARB ); |
nkeynes@635 | 42 | glDisable( GL_ALPHA_TEST ); |
nkeynes@635 | 43 | glDisable( GL_DEPTH_TEST ); |
nkeynes@635 | 44 | glDisable( GL_SCISSOR_TEST ); |
nkeynes@635 | 45 | glDisable( GL_CULL_FACE ); |
nkeynes@635 | 46 | glDrawBuffer( GL_FRONT ); |
nkeynes@635 | 47 | } |
nkeynes@635 | 48 | |
nkeynes@635 | 49 | void gl_display_render_buffer( render_buffer_t buffer ) |
nkeynes@635 | 50 | { |
nkeynes@635 | 51 | gl_texture_window( buffer->width, buffer->height, buffer->buf_id, buffer->inverted ); |
nkeynes@635 | 52 | } |
nkeynes@635 | 53 | |
nkeynes@854 | 54 | /** |
nkeynes@854 | 55 | * Convert window coordinates to dreamcast device coords (640x480) using the |
nkeynes@854 | 56 | * same viewable area as gl_texture_window. |
nkeynes@854 | 57 | * If the coordinates are outside the viewable area, the result is -1,-1. |
nkeynes@854 | 58 | */ |
nkeynes@854 | 59 | void gl_window_to_system_coords( int *x, int *y ) |
nkeynes@854 | 60 | { |
nkeynes@854 | 61 | int x1=0,y1=0,x2=video_width,y2=video_height; |
nkeynes@854 | 62 | |
nkeynes@854 | 63 | int ah = video_width * 0.75; |
nkeynes@854 | 64 | |
nkeynes@854 | 65 | if( ah > video_height ) { |
nkeynes@854 | 66 | int w = (video_height/0.75); |
nkeynes@854 | 67 | x1 = (video_width - w)/2; |
nkeynes@854 | 68 | x2 -= x1; |
nkeynes@854 | 69 | } else if( ah < video_height ) { |
nkeynes@854 | 70 | y1 = (video_height - ah)/2; |
nkeynes@854 | 71 | y2 -= y1; |
nkeynes@854 | 72 | } |
nkeynes@854 | 73 | if( *x < x1 || *x >= x2 || *y < y1 || *y >= y2 ) { |
nkeynes@854 | 74 | *x = -1; |
nkeynes@854 | 75 | *y = -1; |
nkeynes@854 | 76 | } else { |
nkeynes@854 | 77 | *x = (*x - x1) * DISPLAY_WIDTH / (x2-x1); |
nkeynes@854 | 78 | *y = (*y - y1) * DISPLAY_HEIGHT / (y2-y1); |
nkeynes@854 | 79 | } |
nkeynes@854 | 80 | } |
nkeynes@854 | 81 | |
nkeynes@635 | 82 | void gl_texture_window( int width, int height, int tex_id, gboolean inverted ) |
nkeynes@635 | 83 | { |
nkeynes@635 | 84 | float top, bottom; |
nkeynes@635 | 85 | if( inverted ) { |
nkeynes@736 | 86 | top = ((float)height); |
nkeynes@736 | 87 | bottom = 0; |
nkeynes@635 | 88 | } else { |
nkeynes@736 | 89 | top = 0; |
nkeynes@736 | 90 | bottom = ((float)height); |
nkeynes@635 | 91 | } |
nkeynes@635 | 92 | |
nkeynes@635 | 93 | /* Reset display parameters */ |
nkeynes@635 | 94 | gl_reset_state(); |
nkeynes@635 | 95 | glColor3f( 0,0,0 ); |
nkeynes@635 | 96 | |
nkeynes@635 | 97 | int x1=0,y1=0,x2=video_width,y2=video_height; |
nkeynes@635 | 98 | |
nkeynes@635 | 99 | int ah = video_width * 0.75; |
nkeynes@635 | 100 | |
nkeynes@635 | 101 | if( ah > video_height ) { |
nkeynes@736 | 102 | int w = (video_height/0.75); |
nkeynes@736 | 103 | x1 = (video_width - w)/2; |
nkeynes@736 | 104 | x2 -= x1; |
nkeynes@635 | 105 | |
nkeynes@736 | 106 | glBegin( GL_QUADS ); |
nkeynes@736 | 107 | glVertex2f( 0, 0 ); |
nkeynes@736 | 108 | glVertex2f( x1, 0 ); |
nkeynes@736 | 109 | glVertex2f( x1, video_height ); |
nkeynes@736 | 110 | glVertex2f( 0, video_height); |
nkeynes@736 | 111 | glVertex2f( x2, 0 ); |
nkeynes@736 | 112 | glVertex2f( video_width, 0 ); |
nkeynes@736 | 113 | glVertex2f( video_width, video_height ); |
nkeynes@736 | 114 | glVertex2f( x2, video_height); |
nkeynes@736 | 115 | glEnd(); |
nkeynes@635 | 116 | } else if( ah < video_height ) { |
nkeynes@736 | 117 | y1 = (video_height - ah)/2; |
nkeynes@736 | 118 | y2 -= y1; |
nkeynes@736 | 119 | glBegin( GL_QUADS ); |
nkeynes@736 | 120 | glVertex2f( 0, 0 ); |
nkeynes@736 | 121 | glVertex2f( video_width, 0 ); |
nkeynes@736 | 122 | glVertex2f( video_width, y1 ); |
nkeynes@736 | 123 | glVertex2f( 0, y1 ); |
nkeynes@736 | 124 | glVertex2f( 0, y2 ); |
nkeynes@736 | 125 | glVertex2f( video_width, y2 ); |
nkeynes@736 | 126 | glVertex2f( video_width, video_height ); |
nkeynes@736 | 127 | glVertex2f( 0, video_height ); |
nkeynes@736 | 128 | glEnd(); |
nkeynes@635 | 129 | } |
nkeynes@635 | 130 | |
nkeynes@635 | 131 | /* Render the textured rectangle */ |
nkeynes@635 | 132 | glEnable( GL_TEXTURE_RECTANGLE_ARB ); |
nkeynes@635 | 133 | glBindTexture( GL_TEXTURE_RECTANGLE_ARB, tex_id ); |
nkeynes@635 | 134 | glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE ); |
nkeynes@635 | 135 | glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
nkeynes@635 | 136 | glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
nkeynes@635 | 137 | glEnable( GL_BLEND ); |
nkeynes@635 | 138 | glBlendFunc( GL_ONE, GL_ZERO ); |
nkeynes@635 | 139 | glBegin( GL_QUADS ); |
nkeynes@635 | 140 | glTexCoord2f( 0, top ); |
nkeynes@635 | 141 | glVertex2f( x1, y1 ); |
nkeynes@635 | 142 | glTexCoord2f( ((float)width), top ); |
nkeynes@635 | 143 | glVertex2f( x2, y1 ); |
nkeynes@635 | 144 | glTexCoord2f( ((float)width), bottom ); |
nkeynes@635 | 145 | glVertex2f( x2, y2 ); |
nkeynes@635 | 146 | glTexCoord2f( 0, bottom ); |
nkeynes@635 | 147 | glVertex2f( x1, y2 ); |
nkeynes@635 | 148 | glEnd(); |
nkeynes@635 | 149 | glDisable( GL_TEXTURE_RECTANGLE_ARB ); |
nkeynes@635 | 150 | glFlush(); |
nkeynes@635 | 151 | } |
nkeynes@635 | 152 | |
nkeynes@635 | 153 | gboolean gl_load_frame_buffer( frame_buffer_t frame, int tex_id ) |
nkeynes@635 | 154 | { |
nkeynes@635 | 155 | GLenum type = colour_formats[frame->colour_format].type; |
nkeynes@635 | 156 | GLenum format = colour_formats[frame->colour_format].format; |
nkeynes@635 | 157 | int bpp = colour_formats[frame->colour_format].bpp; |
nkeynes@635 | 158 | int rowstride = (frame->rowstride / bpp) - frame->width; |
nkeynes@736 | 159 | |
nkeynes@635 | 160 | glPixelStorei( GL_UNPACK_ROW_LENGTH, rowstride ); |
nkeynes@635 | 161 | glBindTexture( GL_TEXTURE_RECTANGLE_ARB, tex_id ); |
nkeynes@635 | 162 | glTexSubImage2D( GL_TEXTURE_RECTANGLE_ARB, 0, 0,0, |
nkeynes@736 | 163 | frame->width, frame->height, format, type, frame->data ); |
nkeynes@635 | 164 | return TRUE; |
nkeynes@635 | 165 | } |
nkeynes@635 | 166 | |
nkeynes@669 | 167 | void gl_display_blank( uint32_t colour ) |
nkeynes@635 | 168 | { |
nkeynes@635 | 169 | gl_reset_state(); |
nkeynes@635 | 170 | glColor3ub( (colour >> 16) & 0xFF, (colour >> 8) & 0xFF, colour & 0xFF ); |
nkeynes@635 | 171 | glRecti(0,0, video_width, video_height ); |
nkeynes@635 | 172 | glFlush(); |
nkeynes@635 | 173 | } |
nkeynes@635 | 174 | |
nkeynes@635 | 175 | /** |
nkeynes@635 | 176 | * Generic GL read_render_buffer. This function assumes that the caller |
nkeynes@635 | 177 | * has already set the appropriate glReadBuffer(); in other words, unless |
nkeynes@635 | 178 | * there's only one buffer this needs to be wrapped. |
nkeynes@635 | 179 | */ |
nkeynes@635 | 180 | gboolean gl_read_render_buffer( unsigned char *target, render_buffer_t buffer, |
nkeynes@736 | 181 | int rowstride, int colour_format ) |
nkeynes@635 | 182 | { |
nkeynes@635 | 183 | glFinish(); |
nkeynes@635 | 184 | GLenum type = colour_formats[colour_format].type; |
nkeynes@635 | 185 | GLenum format = colour_formats[colour_format].format; |
nkeynes@635 | 186 | // int line_size = buffer->width * colour_formats[colour_format].bpp; |
nkeynes@635 | 187 | // int size = line_size * buffer->height; |
nkeynes@635 | 188 | int glrowstride = (rowstride / colour_formats[colour_format].bpp) - buffer->width; |
nkeynes@635 | 189 | glPixelStorei( GL_PACK_ROW_LENGTH, glrowstride ); |
nkeynes@736 | 190 | |
nkeynes@635 | 191 | glReadPixels( 0, 0, buffer->width, buffer->height, format, type, target ); |
nkeynes@635 | 192 | return TRUE; |
nkeynes@635 | 193 | } |
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