filename | src/drivers/video_gl.c |
changeset | 1236:d93175c36387 |
prev | 1222:a4545699a82b |
next | 1239:be3121267597 |
author | nkeynes |
date | Fri Feb 24 21:17:47 2012 +1000 (9 years ago) |
permissions | -rw-r--r-- |
last change | Factor video_width/video_height out into video_gl.c Convert immediate-mode bits in video_gl.c into a structure for glDrawArray Move setOrtho into defineOrthoMatrix in glutil.c Rearrange various GL settings to keep a consistent state |
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@1236 | 23 | #include "pvr2/glutil.h" |
nkeynes@635 | 24 | #include "drivers/video_gl.h" |
nkeynes@635 | 25 | |
nkeynes@1236 | 26 | uint32_t video_width, video_height; |
nkeynes@1236 | 27 | struct video_vertex { |
nkeynes@1236 | 28 | float x,y; |
nkeynes@1236 | 29 | float u,v; |
nkeynes@1236 | 30 | float r,g,b; |
nkeynes@1236 | 31 | }; |
nkeynes@1236 | 32 | |
nkeynes@1236 | 33 | static struct video_box_t { |
nkeynes@1236 | 34 | float viewMatrix[16]; |
nkeynes@1236 | 35 | struct video_vertex gap1[4]; |
nkeynes@1236 | 36 | struct video_vertex gap2[4]; |
nkeynes@1236 | 37 | struct video_vertex video_view[4]; |
nkeynes@1236 | 38 | struct video_vertex invert_view[4]; |
nkeynes@1236 | 39 | } video_box; |
nkeynes@1236 | 40 | |
nkeynes@1236 | 41 | void gl_set_video_size( uint32_t width, uint32_t height ) |
nkeynes@1236 | 42 | { |
nkeynes@1236 | 43 | video_width = width; |
nkeynes@1236 | 44 | video_height = height; |
nkeynes@1236 | 45 | |
nkeynes@1236 | 46 | int x1=0,y1=0,x2=video_width,y2=video_height; |
nkeynes@1236 | 47 | |
nkeynes@1236 | 48 | int ah = video_width * 0.75; |
nkeynes@1236 | 49 | |
nkeynes@1236 | 50 | if( ah > video_height ) { |
nkeynes@1236 | 51 | int w = (video_height/0.75); |
nkeynes@1236 | 52 | x1 = (video_width - w)/2; |
nkeynes@1236 | 53 | x2 -= x1; |
nkeynes@1236 | 54 | video_box.gap1[0].x = 0; video_box.gap1[0].y = 0; |
nkeynes@1236 | 55 | video_box.gap1[1].x = x1; video_box.gap1[1].y = 0; |
nkeynes@1236 | 56 | video_box.gap1[2].x = 0; video_box.gap1[2].y = video_height; |
nkeynes@1236 | 57 | video_box.gap1[3].x = x2; video_box.gap1[3].y = video_height; |
nkeynes@1236 | 58 | video_box.gap2[0].x = x2; video_box.gap2[0].y = 0; |
nkeynes@1236 | 59 | video_box.gap2[1].x = video_width; video_box.gap2[1].y = 0; |
nkeynes@1236 | 60 | video_box.gap2[2].x = x2; video_box.gap2[2].y = video_height; |
nkeynes@1236 | 61 | video_box.gap2[3].x = video_width; video_box.gap2[3].y = video_height; |
nkeynes@1236 | 62 | } else if( ah < video_height ) { |
nkeynes@1236 | 63 | y1 = (video_height - ah)/2; |
nkeynes@1236 | 64 | y2 -= y1; |
nkeynes@1236 | 65 | |
nkeynes@1236 | 66 | video_box.gap1[0].x = 0; video_box.gap1[0].y = 0; |
nkeynes@1236 | 67 | video_box.gap1[1].x = video_width; video_box.gap1[1].y = 0; |
nkeynes@1236 | 68 | video_box.gap1[2].x = 0; video_box.gap1[2].y = y1; |
nkeynes@1236 | 69 | video_box.gap1[3].x = video_width; video_box.gap1[3].y = y1; |
nkeynes@1236 | 70 | video_box.gap2[0].x = 0; video_box.gap2[0].y = y2; |
nkeynes@1236 | 71 | video_box.gap2[1].x = video_width; video_box.gap2[1].y = y2; |
nkeynes@1236 | 72 | video_box.gap2[2].x = 0; video_box.gap2[2].y = video_height; |
nkeynes@1236 | 73 | video_box.gap2[3].x = video_width; video_box.gap2[3].y = video_height; |
nkeynes@1236 | 74 | } |
nkeynes@1236 | 75 | |
nkeynes@1236 | 76 | video_box.video_view[0].x = x1; video_box.video_view[0].y = y1; |
nkeynes@1236 | 77 | video_box.video_view[0].u = 0; video_box.video_view[0].v = 0; |
nkeynes@1236 | 78 | video_box.video_view[1].x = x2; video_box.video_view[1].y = y1; |
nkeynes@1236 | 79 | video_box.video_view[1].u = 1; video_box.video_view[1].v = 0; |
nkeynes@1236 | 80 | video_box.video_view[2].x = x1; video_box.video_view[2].y = y2; |
nkeynes@1236 | 81 | video_box.video_view[2].u = 0; video_box.video_view[2].v = 1; |
nkeynes@1236 | 82 | video_box.video_view[3].x = x2; video_box.video_view[3].y = y2; |
nkeynes@1236 | 83 | video_box.video_view[3].u = 1; video_box.video_view[3].v = 1; |
nkeynes@1236 | 84 | |
nkeynes@1236 | 85 | memcpy( &video_box.invert_view, &video_box.video_view, sizeof(video_box.video_view) ); |
nkeynes@1236 | 86 | video_box.invert_view[0].v = 1; video_box.invert_view[1].v = 1; |
nkeynes@1236 | 87 | video_box.invert_view[2].v = 0; video_box.invert_view[3].v = 0; |
nkeynes@1236 | 88 | |
nkeynes@1236 | 89 | defineOrthoMatrix(video_box.viewMatrix, video_width, video_height, 0, 65535); |
nkeynes@1236 | 90 | } |
nkeynes@635 | 91 | |
nkeynes@635 | 92 | /** |
nkeynes@1236 | 93 | * Setup the gl context for writes to the display output. |
nkeynes@635 | 94 | */ |
nkeynes@1236 | 95 | void gl_framebuffer_setup() |
nkeynes@635 | 96 | { |
nkeynes@1236 | 97 | glLoadMatrixf(video_box.viewMatrix); |
nkeynes@1236 | 98 | glBlendFunc( GL_ONE, GL_ZERO ); |
nkeynes@1236 | 99 | glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE ); |
nkeynes@635 | 100 | glViewport( 0, 0, video_width, video_height ); |
nkeynes@1236 | 101 | glVertexPointer(2, GL_FLOAT, sizeof(struct video_vertex), &video_box.gap1[0].x); |
nkeynes@1236 | 102 | glColorPointer(3, GL_FLOAT, sizeof(struct video_vertex), &video_box.gap1[0].r); |
nkeynes@1236 | 103 | glTexCoordPointer(2, GL_FLOAT, sizeof(struct video_vertex), &video_box.gap1[0].u); |
nkeynes@1236 | 104 | glEnableClientState( GL_VERTEX_ARRAY ); |
nkeynes@1236 | 105 | glEnableClientState( GL_COLOR_ARRAY ); |
nkeynes@1236 | 106 | glEnableClientState( GL_TEXTURE_COORD_ARRAY ); |
nkeynes@635 | 107 | } |
nkeynes@635 | 108 | |
nkeynes@635 | 109 | void gl_display_render_buffer( render_buffer_t buffer ) |
nkeynes@635 | 110 | { |
nkeynes@635 | 111 | gl_texture_window( buffer->width, buffer->height, buffer->buf_id, buffer->inverted ); |
nkeynes@635 | 112 | } |
nkeynes@635 | 113 | |
nkeynes@854 | 114 | /** |
nkeynes@854 | 115 | * Convert window coordinates to dreamcast device coords (640x480) using the |
nkeynes@854 | 116 | * same viewable area as gl_texture_window. |
nkeynes@854 | 117 | * If the coordinates are outside the viewable area, the result is -1,-1. |
nkeynes@854 | 118 | */ |
nkeynes@854 | 119 | void gl_window_to_system_coords( int *x, int *y ) |
nkeynes@854 | 120 | { |
nkeynes@854 | 121 | int x1=0,y1=0,x2=video_width,y2=video_height; |
nkeynes@854 | 122 | |
nkeynes@854 | 123 | int ah = video_width * 0.75; |
nkeynes@854 | 124 | |
nkeynes@854 | 125 | if( ah > video_height ) { |
nkeynes@854 | 126 | int w = (video_height/0.75); |
nkeynes@854 | 127 | x1 = (video_width - w)/2; |
nkeynes@854 | 128 | x2 -= x1; |
nkeynes@854 | 129 | } else if( ah < video_height ) { |
nkeynes@854 | 130 | y1 = (video_height - ah)/2; |
nkeynes@854 | 131 | y2 -= y1; |
nkeynes@854 | 132 | } |
nkeynes@854 | 133 | if( *x < x1 || *x >= x2 || *y < y1 || *y >= y2 ) { |
nkeynes@854 | 134 | *x = -1; |
nkeynes@854 | 135 | *y = -1; |
nkeynes@854 | 136 | } else { |
nkeynes@854 | 137 | *x = (*x - x1) * DISPLAY_WIDTH / (x2-x1); |
nkeynes@854 | 138 | *y = (*y - y1) * DISPLAY_HEIGHT / (y2-y1); |
nkeynes@854 | 139 | } |
nkeynes@854 | 140 | } |
nkeynes@854 | 141 | |
nkeynes@635 | 142 | void gl_texture_window( int width, int height, int tex_id, gboolean inverted ) |
nkeynes@635 | 143 | { |
nkeynes@635 | 144 | /* Reset display parameters */ |
nkeynes@1236 | 145 | gl_framebuffer_setup(); |
nkeynes@1236 | 146 | glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); |
nkeynes@1236 | 147 | glDrawArrays(GL_TRIANGLE_STRIP, 4, 4); |
nkeynes@1236 | 148 | glEnable(GL_TEXTURE_2D); |
nkeynes@1236 | 149 | glBindTexture(GL_TEXTURE_2D,tex_id); |
nkeynes@1222 | 150 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
nkeynes@1222 | 151 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
nkeynes@1236 | 152 | glDrawArrays(GL_TRIANGLE_STRIP, inverted ? 12 : 8, 4); |
nkeynes@1236 | 153 | glDisable(GL_TEXTURE_2D); |
nkeynes@635 | 154 | glFlush(); |
nkeynes@635 | 155 | } |
nkeynes@635 | 156 | |
nkeynes@635 | 157 | gboolean gl_load_frame_buffer( frame_buffer_t frame, int tex_id ) |
nkeynes@635 | 158 | { |
nkeynes@635 | 159 | GLenum type = colour_formats[frame->colour_format].type; |
nkeynes@635 | 160 | GLenum format = colour_formats[frame->colour_format].format; |
nkeynes@635 | 161 | int bpp = colour_formats[frame->colour_format].bpp; |
nkeynes@635 | 162 | int rowstride = (frame->rowstride / bpp) - frame->width; |
nkeynes@736 | 163 | |
nkeynes@635 | 164 | glPixelStorei( GL_UNPACK_ROW_LENGTH, rowstride ); |
nkeynes@1222 | 165 | glBindTexture( GL_TEXTURE_2D, tex_id ); |
nkeynes@1222 | 166 | glTexSubImage2D( GL_TEXTURE_2D, 0, 0,0, |
nkeynes@736 | 167 | frame->width, frame->height, format, type, frame->data ); |
nkeynes@1236 | 168 | glPixelStorei( GL_UNPACK_ROW_LENGTH, 0 ); |
nkeynes@635 | 169 | return TRUE; |
nkeynes@635 | 170 | } |
nkeynes@635 | 171 | |
nkeynes@669 | 172 | void gl_display_blank( uint32_t colour ) |
nkeynes@635 | 173 | { |
nkeynes@1236 | 174 | /* Set the video_box background colour */ |
nkeynes@1236 | 175 | video_box.video_view[0].r = ((float)(((colour >> 16) & 0xFF) + 1)) / 256.0; |
nkeynes@1236 | 176 | video_box.video_view[0].g = ((float)(((colour >> 8) & 0xFF) + 1)) / 256.0; |
nkeynes@1236 | 177 | video_box.video_view[0].b = ((float)((colour & 0xFF) + 1)) / 256.0; |
nkeynes@1236 | 178 | memcpy( &video_box.video_view[1].r, &video_box.video_view[0].r, sizeof(float)*3 ); |
nkeynes@1236 | 179 | memcpy( &video_box.video_view[2].r, &video_box.video_view[0].r, sizeof(float)*3 ); |
nkeynes@1236 | 180 | memcpy( &video_box.video_view[3].r, &video_box.video_view[0].r, sizeof(float)*3 ); |
nkeynes@1236 | 181 | |
nkeynes@1236 | 182 | /* And render */ |
nkeynes@1236 | 183 | gl_framebuffer_setup(); |
nkeynes@1236 | 184 | glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); |
nkeynes@1236 | 185 | glDrawArrays(GL_TRIANGLE_STRIP, 4, 4); |
nkeynes@1236 | 186 | glDrawArrays(GL_TRIANGLE_STRIP, 8, 4); |
nkeynes@635 | 187 | glFlush(); |
nkeynes@635 | 188 | } |
nkeynes@635 | 189 | |
nkeynes@635 | 190 | /** |
nkeynes@635 | 191 | * Generic GL read_render_buffer. This function assumes that the caller |
nkeynes@635 | 192 | * has already set the appropriate glReadBuffer(); in other words, unless |
nkeynes@635 | 193 | * there's only one buffer this needs to be wrapped. |
nkeynes@635 | 194 | */ |
nkeynes@635 | 195 | gboolean gl_read_render_buffer( unsigned char *target, render_buffer_t buffer, |
nkeynes@736 | 196 | int rowstride, int colour_format ) |
nkeynes@635 | 197 | { |
nkeynes@635 | 198 | glFinish(); |
nkeynes@635 | 199 | GLenum type = colour_formats[colour_format].type; |
nkeynes@635 | 200 | GLenum format = colour_formats[colour_format].format; |
nkeynes@635 | 201 | // int line_size = buffer->width * colour_formats[colour_format].bpp; |
nkeynes@635 | 202 | // int size = line_size * buffer->height; |
nkeynes@635 | 203 | int glrowstride = (rowstride / colour_formats[colour_format].bpp) - buffer->width; |
nkeynes@635 | 204 | glPixelStorei( GL_PACK_ROW_LENGTH, glrowstride ); |
nkeynes@635 | 205 | glReadPixels( 0, 0, buffer->width, buffer->height, format, type, target ); |
nkeynes@1236 | 206 | glPixelStorei( GL_PACK_ROW_LENGTH, 0 ); |
nkeynes@635 | 207 | return TRUE; |
nkeynes@635 | 208 | } |
.