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1 | /****************************************************************************** |
2 | * Arachnoid Graphics Plugin for Mupen64Plus |
3 | * http://bitbucket.org/wahrhaft/mupen64plus-video-arachnoid/ |
4 | * |
5 | * Copyright (C) 2007 Kristofer Karlsson, Rickard Niklasson |
6 | * |
7 | * This program is free software; you can redistribute it and/or |
8 | * modify it under the terms of the GNU General Public License |
9 | * as published by the Free Software Foundation; either version 2 |
10 | * of the License, or (at your option) any later version. |
11 | * |
12 | * This program is distributed in the hope that it will be useful, |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | * GNU General Public License for more details. |
16 | * |
17 | * You should have received a copy of the GNU General Public License |
18 | * along with this program; if not, write to the Free Software |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
20 | *****************************************************************************/ |
21 | |
22 | #include "VI.h" |
23 | #include "GBIDefs.h" //_FIXED2FLOAT, _SHIFTR |
24 | #include "m64p.h" |
25 | |
26 | //----------------------------------------------------------------------------- |
27 | //! Constructor |
28 | //----------------------------------------------------------------------------- |
29 | VI::VI() |
30 | { |
31 | m_width = 320; |
32 | m_height = 240; |
33 | } |
34 | |
35 | //----------------------------------------------------------------------------- |
36 | //! Destructor |
37 | //----------------------------------------------------------------------------- |
38 | VI::~VI() |
39 | { |
40 | |
41 | } |
42 | |
43 | //----------------------------------------------------------------------------- |
44 | //* Calculate Size |
45 | //! Calculates width and height of video interface |
46 | //----------------------------------------------------------------------------- |
47 | void VI::calcSize(GFX_INFO* graphicsInfo) |
48 | { |
49 | //Get video interface values |
50 | //unsigned int viScaleX = *graphicsInfo->VI_X_SCALE_REG; |
51 | //unsigned int viScaleY = *graphicsInfo->VI_X_SCALE_REG; |
52 | unsigned int viStartHorizontal = *graphicsInfo->VI_H_START_REG; |
53 | unsigned int viStartVertical = *graphicsInfo->VI_V_START_REG; |
54 | |
55 | //Get Scale |
56 | float xScale = _FIXED2FLOAT(_SHIFTR(*graphicsInfo->VI_X_SCALE_REG, 0, 12), 10); |
57 | float yScale = _FIXED2FLOAT(_SHIFTR(*graphicsInfo->VI_Y_SCALE_REG, 0, 12), 10); |
58 | |
59 | //Get Offsets (no need for these?) |
60 | //float xOffset = _FIXED2FLOAT(_SHIFTR(viScaleX, 16, 12), 10); |
61 | //float yOffset = _FIXED2FLOAT(_SHIFTR(viScaleY, 16, 12), 10); |
62 | |
63 | //Get horizontal coordinats |
64 | unsigned int hEnd = _SHIFTR( viStartHorizontal, 0, 10 ); |
65 | unsigned int hStart = _SHIFTR( viStartHorizontal, 16, 10 ); |
66 | |
67 | //Get vertical coordinats |
68 | // These are in half-lines, so shift an extra bit |
69 | unsigned int vEnd = _SHIFTR( viStartVertical, 1, 9 ); |
70 | unsigned int vStart = _SHIFTR( viStartVertical, 17, 9 ); |
71 | |
72 | //Calculate size |
73 | m_width = (int)((hEnd - hStart) * xScale); |
74 | m_height = (int)((vEnd - vStart) * yScale * 1.0126582f); |
75 | |
76 | //If Zero: Set to defaults |
77 | if ( m_width == 0.0f ) m_width = 320; |
78 | if ( m_height == 0.0f ) m_height = 240; |
79 | |
80 | //m_width = 320; |
81 | //m_height = 240; |
82 | } |