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cebix |
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/* |
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* video.cpp - Video/graphics emulation |
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* |
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* Basilisk II (C) 1997-1999 Christian Bauer |
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* Portions (C) 1997-1999 Marc Hellwig |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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/* |
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* SEE ALSO |
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* Inside Macintosh: Devices, chapter 1 "Device Manager" |
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* Designing Cards and Drivers for the Macintosh Family, Second Edition |
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*/ |
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#include <stdio.h> |
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#include "sysdeps.h" |
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#include "cpu_emulation.h" |
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#include "main.h" |
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#include "macos_util.h" |
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#include "video.h" |
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#include "video_defs.h" |
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#define DEBUG 0 |
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#include "debug.h" |
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// Description of the main monitor |
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video_desc VideoMonitor; |
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// Local variables (per monitor) |
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struct { |
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video_desc *desc; // Pointer to monitor description |
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uint8 palette[256 * 3]; // Color palette, 256 entries, RGB |
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bool luminance_mapping; // Luminance mapping on/off |
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bool interrupts_enabled; // VBL interrupts on/off |
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} VidLocal; |
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/* |
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* Driver Open() routine |
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*/ |
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int16 VideoOpen(uint32 pb, uint32 dce) |
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{ |
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D(bug("VideoOpen\n")); |
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// Init local variables |
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VidLocal.desc = &VideoMonitor; |
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VidLocal.luminance_mapping = false; |
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VidLocal.interrupts_enabled = false; |
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// Init color palette (solid gray) |
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if (!IsDirectMode(VidLocal.desc->mode)) { |
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for (int i=0; i<256; i++) { |
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VidLocal.palette[i * 3 + 0] = 127; |
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VidLocal.palette[i * 3 + 1] = 127; |
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VidLocal.palette[i * 3 + 2] = 127; |
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} |
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video_set_palette(VidLocal.palette); |
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} |
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return noErr; |
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} |
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/* |
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* Driver Control() routine |
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*/ |
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int16 VideoControl(uint32 pb, uint32 dce) |
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{ |
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uint16 code = ReadMacInt16(pb + csCode); |
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uint32 param = ReadMacInt32(pb + csParam); |
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D(bug("VideoControl %d\n", code)); |
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switch (code) { |
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case cscSetMode: // Set color depth |
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D(bug(" SetMode %04x\n", ReadMacInt16(param + csMode))); |
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WriteMacInt32(param + csBaseAddr, VidLocal.desc->mac_frame_base); |
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return noErr; |
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case cscSetEntries: { // Set palette |
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D(bug(" SetEntries table %08lx, count %d, start %d\n", ReadMacInt32(param + csTable), ReadMacInt16(param + csCount), ReadMacInt16(param + csStart))); |
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if (IsDirectMode(VidLocal.desc->mode)) |
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return controlErr; |
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uint32 s_pal = ReadMacInt32(param + csTable); // Source palette |
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uint8 *d_pal; // Destination palette |
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uint16 count = ReadMacInt16(param + csCount); |
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if (!s_pal || count > 255) |
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return paramErr; |
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if (ReadMacInt16(param + csStart) == 0xffff) { // Indexed |
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for (uint32 i=0; i<=count; i++) { |
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d_pal = VidLocal.palette + ReadMacInt16(s_pal) * 3; |
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uint8 red = (uint16)ReadMacInt16(s_pal + 2) >> 8; |
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uint8 green = (uint16)ReadMacInt16(s_pal + 4) >> 8; |
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uint8 blue = (uint16)ReadMacInt16(s_pal + 6) >> 8; |
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if (VidLocal.luminance_mapping) |
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red = green = blue = (red * 0x4ccc + green * 0x970a + blue * 0x1c29) >> 16; |
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*d_pal++ = red; |
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*d_pal++ = green; |
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*d_pal++ = blue; |
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s_pal += 8; |
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} |
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} else { // Sequential |
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d_pal = VidLocal.palette + ReadMacInt16(param + csStart) * 3; |
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for (uint32 i=0; i<=count; i++) { |
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uint8 red = (uint16)ReadMacInt16(s_pal + 2) >> 8; |
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uint8 green = (uint16)ReadMacInt16(s_pal + 4) >> 8; |
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uint8 blue = (uint16)ReadMacInt16(s_pal + 6) >> 8; |
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if (VidLocal.luminance_mapping) |
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red = green = blue = (red * 0x4ccc + green * 0x970a + blue * 0x1c29) >> 16; |
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*d_pal++ = red; |
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*d_pal++ = green; |
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*d_pal++ = blue; |
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s_pal += 8; |
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} |
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} |
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video_set_palette(VidLocal.palette); |
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return noErr; |
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} |
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case cscSetGamma: // Set gamma table |
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D(bug(" SetGamma\n")); |
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return noErr; |
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case cscGrayPage: { // Fill page with dithered gray pattern |
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D(bug(" GrayPage %d\n", ReadMacInt16(param + csPage))); |
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if (ReadMacInt16(param + csPage)) |
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return paramErr; |
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uint32 pattern[6] = { |
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0xaaaaaaaa, // 1 bpp |
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0xcccccccc, // 2 bpp |
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0xf0f0f0f0, // 4 bpp |
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0xff00ff00, // 8 bpp |
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0xffff0000, // 16 bpp |
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0xffffffff // 32 bpp |
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}; |
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uint32 p = VidLocal.desc->mac_frame_base; |
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uint32 pat = pattern[VidLocal.desc->mode]; |
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for (uint32 y=0; y<VidLocal.desc->y; y++) { |
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uint32 p2 = p; |
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for (uint32 x=0; x<VidLocal.desc->bytes_per_row / 4; x++) { |
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WriteMacInt32(p2, pat); |
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p2 += 4; |
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if (VidLocal.desc->mode == VMODE_32BIT) |
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pat = ~pat; |
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} |
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p += VidLocal.desc->bytes_per_row; |
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pat = ~pat; |
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} |
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return noErr; |
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} |
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case cscSetGray: // Enable/disable luminance mapping |
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D(bug(" SetGray %02x\n", ReadMacInt8(param + csMode))); |
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VidLocal.luminance_mapping = ReadMacInt8(param + csMode); |
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return noErr; |
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case cscSwitchMode: // Switch video mode |
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D(bug(" SwitchMode %04x, %08lx\n", ReadMacInt16(param + csMode), ReadMacInt32(param + csData))); |
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WriteMacInt32(param + csBaseAddr, VidLocal.desc->mac_frame_base); |
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return noErr; |
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case cscSetInterrupt: // Enable/disable VBL |
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D(bug(" SetInterrupt %02x\n", ReadMacInt8(param + csMode))); |
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VidLocal.interrupts_enabled = (ReadMacInt8(param + csMode) == 0); |
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return noErr; |
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default: |
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printf("WARNING: Unknown VideoControl(%d)\n", code); |
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return controlErr; |
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} |
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} |
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/* |
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* Driver Status() routine |
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*/ |
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int16 VideoStatus(uint32 pb, uint32 dce) |
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{ |
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uint16 code = ReadMacInt16(pb + csCode); |
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uint32 param = ReadMacInt32(pb + csParam); |
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D(bug("VideoStatus %d\n", code)); |
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switch (code) { |
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case cscGetPageCnt: // Get number of pages |
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D(bug(" GetPageCnt\n")); |
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WriteMacInt16(param + csPage, 1); |
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return noErr; |
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case cscGetPageBase: // Get page base address |
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D(bug(" GetPageBase\n")); |
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WriteMacInt32(param + csBaseAddr, VidLocal.desc->mac_frame_base); |
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return noErr; |
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case cscGetGray: // Get luminance mapping flag |
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D(bug(" GetGray\n")); |
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WriteMacInt8(param + csMode, VidLocal.luminance_mapping ? 1 : 0); |
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return noErr; |
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case cscGetInterrupt: // Get interrupt disable flag |
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D(bug(" GetInterrupt\n")); |
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WriteMacInt8(param + csMode, VidLocal.interrupts_enabled ? 0 : 1); |
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return noErr; |
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case cscGetDefaultMode: // Get default video mode |
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D(bug(" GetDefaultMode\n")); |
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WriteMacInt8(param + csMode, 0x80); |
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return noErr; |
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case cscGetCurMode: // Get current video mode |
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D(bug(" GetCurMode\n")); |
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WriteMacInt16(param + csMode, 0x80); |
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WriteMacInt32(param + csData, 0x80); |
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WriteMacInt16(param + csPage, 0); |
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WriteMacInt32(param + csBaseAddr, VidLocal.desc->mac_frame_base); |
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return noErr; |
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case cscGetConnection: // Get monitor information |
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D(bug(" GetConnection\n")); |
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WriteMacInt16(param + csDisplayType, 6); // 21" Multiscan |
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WriteMacInt8(param + csConnectTaggedType, 6); |
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WriteMacInt8(param + csConnectTaggedData, 0x23); |
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WriteMacInt32(param + csConnectFlags, 0x03); // All modes valid and safe |
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WriteMacInt32(param + csDisplayComponent, 0); |
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return noErr; |
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case cscGetModeTiming: // Get video timing for mode |
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D(bug(" GetModeTiming mode %08lx\n", ReadMacInt32(param + csTimingMode))); |
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WriteMacInt32(param + csTimingFormat, 'decl'); |
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WriteMacInt32(param + csTimingData, 220); // 21" Multiscan |
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WriteMacInt32(param + csTimingFlags, 0x0f); // Mode valid, safe, default and shown in Monitors panel |
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return noErr; |
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case cscGetModeBaseAddress: // Get frame buffer base address |
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D(bug(" GetModeBaseAddress\n")); |
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WriteMacInt32(param + csBaseAddr, VidLocal.desc->mac_frame_base); |
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return noErr; |
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default: |
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printf("WARNING: Unknown VideoStatus(%d)\n", code); |
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return statusErr; |
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} |
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} |
