1/* -*-C++-*-	$NetBSD: framebuffer.cpp,v 1.11 2006/03/05 04:05:39 uwe 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
43FrameBufferInfo::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
89FrameBufferInfo::~FrameBufferInfo()
90{
91	/* NO-OP */
92}
93
94int
95FrameBufferInfo::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