pickmode.c revision 1.1.2.2
1 1.1.2.2 rmind /* $NetBSD: pickmode.c,v 1.1.2.2 2010/05/30 05:17:46 rmind Exp $ */ 2 1.1.2.2 rmind 3 1.1.2.2 rmind /*- 4 1.1.2.2 rmind * Copyright (c) 2006 The NetBSD Foundation 5 1.1.2.2 rmind * All rights reserved. 6 1.1.2.2 rmind * 7 1.1.2.2 rmind * this code was contributed to The NetBSD Foundation by Michael Lorenz 8 1.1.2.2 rmind * 9 1.1.2.2 rmind * Redistribution and use in source and binary forms, with or without 10 1.1.2.2 rmind * modification, are permitted provided that the following conditions 11 1.1.2.2 rmind * are met: 12 1.1.2.2 rmind * 1. Redistributions of source code must retain the above copyright 13 1.1.2.2 rmind * notice, this list of conditions and the following disclaimer. 14 1.1.2.2 rmind * 2. Redistributions in binary form must reproduce the above copyright 15 1.1.2.2 rmind * notice, this list of conditions and the following disclaimer in the 16 1.1.2.2 rmind * documentation and/or other materials provided with the distribution. 17 1.1.2.2 rmind * 18 1.1.2.2 rmind * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS 19 1.1.2.2 rmind * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 20 1.1.2.2 rmind * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 1.1.2.2 rmind * ARE DISCLAIMED. IN NO EVENT SHALL THE NETBSD FOUNDATION BE LIABLE 22 1.1.2.2 rmind * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 1.1.2.2 rmind * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 24 1.1.2.2 rmind * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 1.1.2.2 rmind * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 26 1.1.2.2 rmind * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 27 1.1.2.2 rmind * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 28 1.1.2.2 rmind * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 1.1.2.2 rmind */ 30 1.1.2.2 rmind 31 1.1.2.2 rmind #include <sys/cdefs.h> 32 1.1.2.2 rmind __KERNEL_RCSID(0, "$NetBSD: pickmode.c,v 1.1.2.2 2010/05/30 05:17:46 rmind Exp $"); 33 1.1.2.2 rmind 34 1.1.2.2 rmind #include <sys/param.h> 35 1.1.2.2 rmind #include <dev/videomode/videomode.h> 36 1.1.2.2 rmind #include "opt_videomode.h" 37 1.1.2.2 rmind 38 1.1.2.2 rmind #ifdef PICKMODE_DEBUG 39 1.1.2.2 rmind #define DPRINTF printf 40 1.1.2.2 rmind #else 41 1.1.2.2 rmind #define DPRINTF while (0) printf 42 1.1.2.2 rmind #endif 43 1.1.2.2 rmind 44 1.1.2.2 rmind const struct videomode * 45 1.1.2.2 rmind pick_mode_by_dotclock(int width, int height, int dotclock) 46 1.1.2.2 rmind { 47 1.1.2.2 rmind const struct videomode *this, *best = NULL; 48 1.1.2.2 rmind int i; 49 1.1.2.2 rmind 50 1.1.2.2 rmind DPRINTF("%s: looking for %d x %d at up to %d kHz\n", __func__, width, 51 1.1.2.2 rmind height, dotclock); 52 1.1.2.2 rmind for (i = 0; i < videomode_count; i++) { 53 1.1.2.2 rmind 54 1.1.2.2 rmind this = &videomode_list[i]; 55 1.1.2.2 rmind if ((this->hdisplay != width) || (this->vdisplay != height) || 56 1.1.2.2 rmind (this->dot_clock > dotclock)) 57 1.1.2.2 rmind continue; 58 1.1.2.2 rmind if (best != NULL) { 59 1.1.2.2 rmind 60 1.1.2.2 rmind if (this->dot_clock > best->dot_clock) 61 1.1.2.2 rmind best = this; 62 1.1.2.2 rmind } else 63 1.1.2.2 rmind best = this; 64 1.1.2.2 rmind } 65 1.1.2.2 rmind if (best!= NULL) 66 1.1.2.2 rmind DPRINTF("found %s\n", best->name); 67 1.1.2.2 rmind 68 1.1.2.2 rmind return best; 69 1.1.2.2 rmind } 70 1.1.2.2 rmind 71 1.1.2.2 rmind const struct videomode * 72 1.1.2.2 rmind pick_mode_by_ref(int width, int height, int refresh) 73 1.1.2.2 rmind { 74 1.1.2.2 rmind const struct videomode *this, *best = NULL; 75 1.1.2.2 rmind int mref, closest = 1000, i, diff; 76 1.1.2.2 rmind 77 1.1.2.2 rmind DPRINTF("%s: looking for %d x %d at up to %d Hz\n", __func__, width, 78 1.1.2.2 rmind height, refresh); 79 1.1.2.2 rmind for (i = 0; i < videomode_count; i++) { 80 1.1.2.2 rmind 81 1.1.2.2 rmind this = &videomode_list[i]; 82 1.1.2.2 rmind mref = this->dot_clock * 1000 / (this->htotal * this->vtotal); 83 1.1.2.2 rmind diff = abs(mref - refresh); 84 1.1.2.2 rmind if ((this->hdisplay != width) || (this->vdisplay != height) || 85 1.1.2.2 rmind (diff > closest)) 86 1.1.2.2 rmind continue; 87 1.1.2.2 rmind if (best != NULL) { 88 1.1.2.2 rmind 89 1.1.2.2 rmind if (diff < closest) { 90 1.1.2.2 rmind 91 1.1.2.2 rmind best = this; 92 1.1.2.2 rmind closest = diff; 93 1.1.2.2 rmind } 94 1.1.2.2 rmind } else 95 1.1.2.2 rmind best = this; 96 1.1.2.2 rmind } 97 1.1.2.2 rmind if (best!= NULL) 98 1.1.2.2 rmind DPRINTF("found %s\n", best->name); 99 1.1.2.2 rmind 100 1.1.2.2 rmind return best; 101 1.1.2.2 rmind } 102
Indexes created Tue Oct 21 19:09:51 GMT 2025