| 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 | } |