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framebuffer.cpp revision 1.11.72.1 
      1 /* -*-C++-*-	$NetBSD: framebuffer.cpp,v 1.11.72.1 2008/05/16 02:22:24 yamt 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  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <hpcmenu.h>
     33 #include <machine/bootinfo.h>
     34 #include <machine/platid.h>
     35 #include <machine/platid_mask.h>
     36 
     37 #include <framebuffer.h>
     38 
     39 //
     40 // framebuffer configuration table can be found in machine_config.cpp
     41 //
     42 
     43 FrameBufferInfo::FrameBufferInfo(uint32_t cpu, uint32_t machine)
     44 {
     45 	struct framebuffer_info *tab = _table;
     46 	platid_mask_t target, entry;
     47 	framebuffer_info *alt = 0;
     48 
     49 	// get current bpp.
     50 	HDC hdc = GetDC(0);
     51 	int bpp = GetDeviceCaps(hdc, BITSPIXEL);
     52 	ReleaseDC(0, hdc);
     53 
     54 	target.dw.dw0 = cpu;
     55 	target.dw.dw1 = machine;
     56 	// search apriori setting if any.
     57 	for (; tab->cpu; tab++) {
     58 		entry.dw.dw0 = tab->cpu;
     59 		entry.dw.dw1 = tab->machine;
     60 		if (platid_match(&target, &entry)) {
     61 			if (tab->bpp == bpp) {
     62 				_fb = tab;
     63 				return;
     64 			} else {
     65 				alt = tab;
     66 			}
     67 		}
     68 	}
     69 
     70 	// use alternative framebuffer setting, if any.
     71 	if (alt) {
     72 		_fb = alt;
     73 		return;
     74 	}
     75 
     76 	// no apriori setting. fill default.
     77 	memset(&_default, 0, sizeof(struct framebuffer_info));
     78 
     79 	_default.cpu = cpu;
     80 	_default.machine = machine;
     81 	hdc = GetDC(0);
     82 	_default.bpp = bpp;
     83 	_default.width = GetDeviceCaps(hdc, HORZRES);
     84 	_default.height = GetDeviceCaps(hdc, VERTRES);
     85 	ReleaseDC(0, hdc);
     86 	_fb = &_default;
     87 }
     88 
     89 FrameBufferInfo::~FrameBufferInfo()
     90 {
     91 	/* NO-OP */
     92 }
     93 
     94 int
     95 FrameBufferInfo::type()
     96 {
     97 	BOOL reverse = HPC_PREFERENCE.reverse_video;
     98 	int type;
     99 
    100 	switch(_fb->bpp) {
    101 	default:
    102 		// FALLTHROUGH
    103 	case 2:
    104 		type = reverse ? BIFB_D2_M2L_3 : BIFB_D2_M2L_0;
    105 		break;
    106 	case 4:
    107 		type = reverse ? BIFB_D4_M2L_F : BIFB_D4_M2L_0;
    108 		break;
    109 	case 8:
    110 		type = reverse ? BIFB_D8_FF : BIFB_D8_00;
    111 		break;
    112 	case 16:
    113 		type = reverse ? BIFB_D16_FFFF : BIFB_D16_0000;
    114 		break;
    115 	}
    116 
    117 	return type;
    118 }
    119