filename | src/drivers/video_gl.c |
changeset | 635:76c63aac3590 |
next | 669:ab344e42bca9 |
author | nkeynes |
date | Thu Feb 14 13:54:11 2008 +0000 (14 years ago) |
branch | lxdream-render |
permissions | -rw-r--r-- |
last change | Commit render work in progress. Main changes: * Preliminary OSMesa support * Move the generic gl code out to pvr2/ * Implement scene data structure + reader * Remove the 1/z adjustments |
file | annotate | diff | log | raw |
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@635 | 39 | glDisable( GL_TEXTURE_2D ); |
nkeynes@635 | 40 | glDisable( GL_ALPHA_TEST ); |
nkeynes@635 | 41 | glDisable( GL_DEPTH_TEST ); |
nkeynes@635 | 42 | glDisable( GL_SCISSOR_TEST ); |
nkeynes@635 | 43 | glDisable( GL_CULL_FACE ); |
nkeynes@635 | 44 | glDrawBuffer( GL_FRONT ); |
nkeynes@635 | 45 | } |
nkeynes@635 | 46 | |
nkeynes@635 | 47 | void gl_display_render_buffer( render_buffer_t buffer ) |
nkeynes@635 | 48 | { |
nkeynes@635 | 49 | gl_texture_window( buffer->width, buffer->height, buffer->buf_id, buffer->inverted ); |
nkeynes@635 | 50 | } |
nkeynes@635 | 51 | |
nkeynes@635 | 52 | void gl_texture_window( int width, int height, int tex_id, gboolean inverted ) |
nkeynes@635 | 53 | { |
nkeynes@635 | 54 | float top, bottom; |
nkeynes@635 | 55 | if( inverted ) { |
nkeynes@635 | 56 | top = ((float)height); |
nkeynes@635 | 57 | bottom = 0; |
nkeynes@635 | 58 | } else { |
nkeynes@635 | 59 | top = 0; |
nkeynes@635 | 60 | bottom = ((float)height); |
nkeynes@635 | 61 | } |
nkeynes@635 | 62 | |
nkeynes@635 | 63 | /* Reset display parameters */ |
nkeynes@635 | 64 | gl_reset_state(); |
nkeynes@635 | 65 | glColor3f( 0,0,0 ); |
nkeynes@635 | 66 | |
nkeynes@635 | 67 | int x1=0,y1=0,x2=video_width,y2=video_height; |
nkeynes@635 | 68 | |
nkeynes@635 | 69 | int ah = video_width * 0.75; |
nkeynes@635 | 70 | |
nkeynes@635 | 71 | if( ah > video_height ) { |
nkeynes@635 | 72 | int w = (video_height/0.75); |
nkeynes@635 | 73 | x1 = (video_width - w)/2; |
nkeynes@635 | 74 | x2 -= x1; |
nkeynes@635 | 75 | |
nkeynes@635 | 76 | glBegin( GL_QUADS ); |
nkeynes@635 | 77 | glVertex2f( 0, 0 ); |
nkeynes@635 | 78 | glVertex2f( x1, 0 ); |
nkeynes@635 | 79 | glVertex2f( x1, video_height ); |
nkeynes@635 | 80 | glVertex2f( 0, video_height); |
nkeynes@635 | 81 | glVertex2f( x2, 0 ); |
nkeynes@635 | 82 | glVertex2f( video_width, 0 ); |
nkeynes@635 | 83 | glVertex2f( video_width, video_height ); |
nkeynes@635 | 84 | glVertex2f( x2, video_height); |
nkeynes@635 | 85 | glEnd(); |
nkeynes@635 | 86 | } else if( ah < video_height ) { |
nkeynes@635 | 87 | y1 = (video_height - ah)/2; |
nkeynes@635 | 88 | y2 -= y1; |
nkeynes@635 | 89 | glBegin( GL_QUADS ); |
nkeynes@635 | 90 | glVertex2f( 0, 0 ); |
nkeynes@635 | 91 | glVertex2f( video_width, 0 ); |
nkeynes@635 | 92 | glVertex2f( video_width, y1 ); |
nkeynes@635 | 93 | glVertex2f( 0, y1 ); |
nkeynes@635 | 94 | glVertex2f( 0, y2 ); |
nkeynes@635 | 95 | glVertex2f( video_width, y2 ); |
nkeynes@635 | 96 | glVertex2f( video_width, video_height ); |
nkeynes@635 | 97 | glVertex2f( 0, video_height ); |
nkeynes@635 | 98 | glEnd(); |
nkeynes@635 | 99 | } |
nkeynes@635 | 100 | |
nkeynes@635 | 101 | /* Render the textured rectangle */ |
nkeynes@635 | 102 | glEnable( GL_TEXTURE_RECTANGLE_ARB ); |
nkeynes@635 | 103 | glBindTexture( GL_TEXTURE_RECTANGLE_ARB, tex_id ); |
nkeynes@635 | 104 | glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE ); |
nkeynes@635 | 105 | glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
nkeynes@635 | 106 | glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
nkeynes@635 | 107 | glEnable( GL_BLEND ); |
nkeynes@635 | 108 | glBlendFunc( GL_ONE, GL_ZERO ); |
nkeynes@635 | 109 | glBegin( GL_QUADS ); |
nkeynes@635 | 110 | glTexCoord2f( 0, top ); |
nkeynes@635 | 111 | glVertex2f( x1, y1 ); |
nkeynes@635 | 112 | glTexCoord2f( ((float)width), top ); |
nkeynes@635 | 113 | glVertex2f( x2, y1 ); |
nkeynes@635 | 114 | glTexCoord2f( ((float)width), bottom ); |
nkeynes@635 | 115 | glVertex2f( x2, y2 ); |
nkeynes@635 | 116 | glTexCoord2f( 0, bottom ); |
nkeynes@635 | 117 | glVertex2f( x1, y2 ); |
nkeynes@635 | 118 | glEnd(); |
nkeynes@635 | 119 | glDisable( GL_TEXTURE_RECTANGLE_ARB ); |
nkeynes@635 | 120 | glFlush(); |
nkeynes@635 | 121 | } |
nkeynes@635 | 122 | |
nkeynes@635 | 123 | gboolean gl_load_frame_buffer( frame_buffer_t frame, int tex_id ) |
nkeynes@635 | 124 | { |
nkeynes@635 | 125 | GLenum type = colour_formats[frame->colour_format].type; |
nkeynes@635 | 126 | GLenum format = colour_formats[frame->colour_format].format; |
nkeynes@635 | 127 | int bpp = colour_formats[frame->colour_format].bpp; |
nkeynes@635 | 128 | int rowstride = (frame->rowstride / bpp) - frame->width; |
nkeynes@635 | 129 | |
nkeynes@635 | 130 | glPixelStorei( GL_UNPACK_ROW_LENGTH, rowstride ); |
nkeynes@635 | 131 | glBindTexture( GL_TEXTURE_RECTANGLE_ARB, tex_id ); |
nkeynes@635 | 132 | glTexSubImage2D( GL_TEXTURE_RECTANGLE_ARB, 0, 0,0, |
nkeynes@635 | 133 | frame->width, frame->height, format, type, frame->data ); |
nkeynes@635 | 134 | return TRUE; |
nkeynes@635 | 135 | } |
nkeynes@635 | 136 | |
nkeynes@635 | 137 | gboolean gl_display_blank( uint32_t colour ) |
nkeynes@635 | 138 | { |
nkeynes@635 | 139 | gl_reset_state(); |
nkeynes@635 | 140 | glColor3ub( (colour >> 16) & 0xFF, (colour >> 8) & 0xFF, colour & 0xFF ); |
nkeynes@635 | 141 | glRecti(0,0, video_width, video_height ); |
nkeynes@635 | 142 | glFlush(); |
nkeynes@635 | 143 | return TRUE; |
nkeynes@635 | 144 | } |
nkeynes@635 | 145 | |
nkeynes@635 | 146 | /** |
nkeynes@635 | 147 | * Generic GL read_render_buffer. This function assumes that the caller |
nkeynes@635 | 148 | * has already set the appropriate glReadBuffer(); in other words, unless |
nkeynes@635 | 149 | * there's only one buffer this needs to be wrapped. |
nkeynes@635 | 150 | */ |
nkeynes@635 | 151 | gboolean gl_read_render_buffer( unsigned char *target, render_buffer_t buffer, |
nkeynes@635 | 152 | int rowstride, int colour_format ) |
nkeynes@635 | 153 | { |
nkeynes@635 | 154 | glFinish(); |
nkeynes@635 | 155 | GLenum type = colour_formats[colour_format].type; |
nkeynes@635 | 156 | GLenum format = colour_formats[colour_format].format; |
nkeynes@635 | 157 | // int line_size = buffer->width * colour_formats[colour_format].bpp; |
nkeynes@635 | 158 | // int size = line_size * buffer->height; |
nkeynes@635 | 159 | int glrowstride = (rowstride / colour_formats[colour_format].bpp) - buffer->width; |
nkeynes@635 | 160 | glPixelStorei( GL_PACK_ROW_LENGTH, glrowstride ); |
nkeynes@635 | 161 | |
nkeynes@635 | 162 | glReadPixels( 0, 0, buffer->width, buffer->height, format, type, target ); |
nkeynes@635 | 163 | return TRUE; |
nkeynes@635 | 164 | } |
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