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framebuffer.cpp revision 1.10 
      1 /* -*-C++-*-	$NetBSD: framebuffer.cpp,v 1.10 2005/12/11 12:17:28 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2001 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by UCHIYAMA Yasushi.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #include <hpcmenu.h>
     40 #include <machine/bootinfo.h>
     41 #include <machine/platid.h>
     42 #include <machine/platid_mask.h>
     43 
     44 #include <framebuffer.h>
     45 
     46 //
     47 // framebuffer configuration table can be found in machine_config.cpp
     48 //
     49 
     50 FrameBufferInfo::FrameBufferInfo(u_int32_t cpu, u_int32_t machine)
     51 {
     52 	struct framebuffer_info *tab = _table;
     53 	platid_mask_t target, entry;
     54 	framebuffer_info *alt = 0;
     55 
     56 	// get current bpp.
     57 	HDC hdc = GetDC(0);
     58 	int bpp = GetDeviceCaps(hdc, BITSPIXEL);
     59 	ReleaseDC(0, hdc);
     60 
     61 	target.dw.dw0 = cpu;
     62 	target.dw.dw1 = machine;
     63 	// search apriori setting if any.
     64 	for (; tab->cpu; tab++) {
     65 		entry.dw.dw0 = tab->cpu;
     66 		entry.dw.dw1 = tab->machine;
     67 		if (platid_match(&target, &entry)) {
     68 			if (tab->bpp == bpp) {
     69 				_fb = tab;
     70 				return;
     71 			} else {
     72 				alt = tab;
     73 			}
     74 		}
     75 	}
     76 
     77 	// use alternative framebuffer setting, if any.
     78 	if (alt) {
     79 		_fb = alt;
     80 		return;
     81 	}
     82 
     83 	// no apriori setting. fill default.
     84 	memset(&_default, 0, sizeof(struct framebuffer_info));
     85 
     86 	_default.cpu = cpu;
     87 	_default.machine = machine;
     88 	hdc = GetDC(0);
     89 	_default.bpp = bpp;
     90 	_default.width = GetDeviceCaps(hdc, HORZRES);
     91 	_default.height = GetDeviceCaps(hdc, VERTRES);
     92 	ReleaseDC(0, hdc);
     93 	_fb = &_default;
     94 }
     95 
     96 FrameBufferInfo::~FrameBufferInfo()
     97 {
     98 	/* NO-OP */
     99 }
    100 
    101 int
    102 FrameBufferInfo::type()
    103 {
    104 	BOOL reverse = HPC_PREFERENCE.reverse_video;
    105 	int type;
    106 
    107 	switch(_fb->bpp) {
    108 	default:
    109 		// FALLTHROUGH
    110 	case 2:
    111 		type = reverse ? BIFB_D2_M2L_3 : BIFB_D2_M2L_0;
    112 		break;
    113 	case 4:
    114 		type = reverse ? BIFB_D4_M2L_F : BIFB_D4_M2L_0;
    115 		break;
    116 	case 8:
    117 		type = reverse ? BIFB_D8_FF : BIFB_D8_00;
    118 		break;
    119 	case 16:
    120 		type = reverse ? BIFB_D16_FFFF : BIFB_D16_0000;
    121 		break;
    122 	}
    123 
    124 	return type;
    125 }
    126