BasiliskII/src/video.cpp

/*
 *  video.cpp - Video/graphics emulation
 *
 *  Basilisk II (C) 1997-2001 Christian Bauer
 *  Portions (C) 1997-1999 Marc Hellwig
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/*
 *  SEE ALSO
 *    Inside Macintosh: Devices, chapter 1 "Device Manager"
 *    Designing Cards and Drivers for the Macintosh Family, Second Edition
 */

#include <stdio.h>

#include "sysdeps.h"
#include "cpu_emulation.h"
#include "main.h"
#include "macos_util.h"
#include "slot_rom.h"
#include "video.h"
#include "video_defs.h"

#define DEBUG 0
#include "debug.h"


// List of supported video modes
vector<video_mode> VideoModes;

// Description of the main monitor
monitor_desc VideoMonitor;

// Depth code -> Apple mode mapping
uint16 apple_mode_for_depth[6];

// Local variables (per monitor)
struct {
        monitor_desc *desc;                     // Pointer to description of monitor handled by this instance of the driver
        uint8 palette[256 * 3];         // Color palette, 256 entries, RGB
        bool luminance_mapping;         // Luminance mapping on/off
        bool interrupts_enabled;        // VBL interrupts on/off
        bool dm_present;                        // We received a GetVideoParameters call, so the Display Manager seems to be present
        uint32 gamma_table;                     // Mac address of gamma table
        int alloc_gamma_table_size;     // Allocated size of gamma table
        uint16 current_mode;            // Currently selected depth/resolution
        uint32 current_id;
        uint16 preferred_mode;          // Preferred depth/resolution
        uint32 preferred_id;
        uint32 slot_param;                      // Mac address of Slot Manager parameter block
} VidLocal;


/*
 *  Initialize apple_mode_for_depth[] array from VideoModes list
 */

void video_init_depth_list(void)
{
        uint16 mode = 0x80;
        for (int depth = VDEPTH_1BIT; depth <= VDEPTH_32BIT; depth++) {
                if (video_has_depth(video_depth(depth)))
                        apple_mode_for_depth[depth] = mode++;
                else
                        apple_mode_for_depth[depth] = 0;
        }
}


/*
 *  Check whether a mode with the specified depth exists
 */

bool video_has_depth(video_depth depth)
{
        vector<video_mode>::const_iterator i = VideoModes.begin(), end = VideoModes.end();
        while (i != end) {
                if (i->depth == depth)
                        return true;
                ++i;
        }
        return false;
}


/*
 *  Check whether specified resolution ID is one of the supported resolutions
 */

static bool has_resolution(uint32 id)
{
        vector<video_mode>::const_iterator i, end = VideoModes.end();
        for (i = VideoModes.begin(); i != end; ++i) {
                if (i->resolution_id == id)
                        return true;
        }
        return false;
}


/*
 *  Find specified mode (depth/resolution) (or VideoModes.end() if not found)
 */

static vector<video_mode>::const_iterator find_mode(uint16 mode, uint32 id)
{
        vector<video_mode>::const_iterator i, end = VideoModes.end();
        for (i = VideoModes.begin(); i != end; ++i) {
                if (i->resolution_id == id && DepthToAppleMode(i->depth) == mode)
                        return i;
        }
        return i;
}


/*
 *  Find maximum supported depth for given resolution ID
 */

static video_depth max_depth_of_resolution(uint32 id)
{
        video_depth m = VDEPTH_1BIT;
        vector<video_mode>::const_iterator i, end = VideoModes.end();
        for (i = VideoModes.begin(); i != end; ++i) {
                if (i->depth > m)
                        m = i->depth;
        }
        return m;
}


/*
 *  Get X/Y size of specified resolution
 */

static void get_size_of_resolution(uint32 id, uint32 &x, uint32 &y)
{
        vector<video_mode>::const_iterator i, end = VideoModes.end();
        for (i = VideoModes.begin(); i != end; ++i) {
                if (i->resolution_id == id) {
                        x = i->x;
                        y = i->y;
                        return;
                }
        }
        x = y = 0;
}


/*
 *  Get bytes-per-row value for specified resolution/depth
 */

uint32 video_bytes_per_row(video_depth depth, uint32 id)
{
        vector<video_mode>::const_iterator i, end = VideoModes.end();
        for (i = VideoModes.begin(); i != end; ++i) {
                if (i->depth == depth && i->resolution_id == id)
                        return i->bytes_per_row;
        }
        uint32 x, y;
        get_size_of_resolution(id, x, y);
        return TrivialBytesPerRow(x, depth);
}


/*
 *  Find palette size for given color depth
 */

static int palette_size(video_depth depth)
{
        switch (depth) {
                case VDEPTH_1BIT: return 2;
                case VDEPTH_2BIT: return 4;
                case VDEPTH_4BIT: return 16;
                case VDEPTH_8BIT: return 256;
                case VDEPTH_16BIT: return 32;
                case VDEPTH_32BIT: return 256;
                default: return 0;
        }
}


/*
 *  Set palette to 50% gray
 */

static void set_gray_palette(void)
{
        for (int i=0; i<256; i++) {
                VidLocal.palette[i * 3 + 0] = 127;
                VidLocal.palette[i * 3 + 1] = 127;
                VidLocal.palette[i * 3 + 2] = 127;
        }
        video_set_palette(VidLocal.palette, 256);
}


/*
 *  Load gamma-corrected black-to-white ramp to palette for direct-color mode
 */

static void load_ramp_palette(void)
{
        // Find tables for gamma correction
        uint8 *red_gamma, *green_gamma, *blue_gamma;
        bool have_gamma = false;
        int data_width = 0;
        if (VidLocal.gamma_table) {
                uint32 table = VidLocal.gamma_table;
                red_gamma = Mac2HostAddr(table + gFormulaData + ReadMacInt16(table + gFormulaSize));
                int chan_cnt = ReadMacInt16(table + gChanCnt);
                if (chan_cnt == 1)
                        green_gamma = blue_gamma = red_gamma;
                else {
                        int ofs = ReadMacInt16(table + gDataCnt);
                        green_gamma = red_gamma + ofs;
                        blue_gamma = green_gamma + ofs;
                }
                data_width = ReadMacInt16(table + gDataWidth);
                have_gamma = true;
        }

        int num = (VidLocal.desc->mode.depth == VDEPTH_16BIT ? 32 : 256);
        uint8 *p = VidLocal.palette;
        for (int i=0; i<num; i++) {
                uint8 red = (i * 256 / num), green = red, blue = red;
                if (have_gamma) {
                        red = red_gamma[red >> (8 - data_width)];
                        green = green_gamma[green >> (8 - data_width)];
                        blue = blue_gamma[blue >> (8 - data_width)];
                }
                *p++ = red;
                *p++ = green;
                *p++ = blue;
        }

        video_set_palette(VidLocal.palette, num);
}


/*
 *  Allocate gamma table of specified size
 */

static bool allocate_gamma_table(int size)
{
        M68kRegisters r;

        if (size > VidLocal.alloc_gamma_table_size) {
                if (VidLocal.gamma_table) {
                        r.a[0] = VidLocal.gamma_table;
                        Execute68kTrap(0xa01f, &r);     // DisposePtr()
                        VidLocal.gamma_table = 0;
                        VidLocal.alloc_gamma_table_size = 0;
                }
                r.d[0] = size;
                Execute68kTrap(0xa71e, &r);     // NewPtrSysClear()
                if (r.a[0] == 0)
                        return false;
                VidLocal.gamma_table = r.a[0];
                VidLocal.alloc_gamma_table_size = size;
        }
        return true;
}


/*
 *  Set gamma table (0 = build linear ramp)
 */

static bool set_gamma_table(uint32 user_table)
{
        if (user_table == 0) { // Build linear ramp, 256 entries

                // Allocate new table, if necessary
                if (!allocate_gamma_table(SIZEOF_GammaTbl + 256))
                        return memFullErr;
                uint32 table = VidLocal.gamma_table;

                // Initialize header
                WriteMacInt16(table + gVersion, 0);
                WriteMacInt16(table + gType, 0);
                WriteMacInt16(table + gFormulaSize, 0);
                WriteMacInt16(table + gChanCnt, 1);
                WriteMacInt16(table + gDataCnt, 256);
                WriteMacInt16(table + gDataWidth, 8);

                // Build ramp
                uint32 p = table + gFormulaData;
                for (int i=0; i<256; i++)
                        WriteMacInt8(p + i, i);

        } else { // User-supplied gamma table

                // Validate header
                if (ReadMacInt16(user_table + gVersion))
                        return paramErr;
                if (ReadMacInt16(user_table + gType))
                        return paramErr;
                int chan_cnt = ReadMacInt16(user_table + gChanCnt);
                if (chan_cnt != 1 && chan_cnt != 3)
                        return paramErr;
                int data_width = ReadMacInt16(user_table + gDataWidth);
                if (data_width > 8)
                        return paramErr;
                int data_cnt = ReadMacInt16(user_table + gDataCnt);
                if (data_cnt != (1 << data_width))
                        return paramErr;

                // Allocate new table, if necessary
                int size = SIZEOF_GammaTbl + ReadMacInt16(user_table + gFormulaSize) + chan_cnt * data_cnt;
                if (!allocate_gamma_table(size))
                        return memFullErr;
                uint32 table = VidLocal.gamma_table;

                // Copy table
                Mac2Mac_memcpy(table, user_table, size);
        }

        if (IsDirectMode(VidLocal.desc->mode))
                load_ramp_palette();

        return true;
}


/*
 *  Switch video mode
 */

static void switch_mode(const video_mode &mode, uint32 param, uint32 dce)
{
        // Switch mode
        set_gray_palette();
        video_switch_to_mode(mode);

        // Update VidLocal
        VidLocal.current_mode = DepthToAppleMode(mode.depth);
        VidLocal.current_id = mode.resolution_id;

        uint32 frame_base = VidLocal.desc->mac_frame_base;

        M68kRegisters r;
        uint32 sp = VidLocal.slot_param;
        r.a[0] = sp;

        // Find functional sResource for this display
        WriteMacInt8(sp + spSlot, ReadMacInt8(dce + dCtlSlot));
        WriteMacInt8(sp + spID, ReadMacInt8(dce + dCtlSlotId));
        WriteMacInt8(sp + spExtDev, 0);
        r.d[0] = 0x0016;
        Execute68kTrap(0xa06e, &r);     // SRsrcInfo()
        uint32 rsrc = ReadMacInt32(sp + spPointer);

        // Patch minorBase (otherwise rebooting won't work)
        WriteMacInt8(sp + spID, 0x0a); // minorBase
        r.d[0] = 0x0006;
        Execute68kTrap(0xa06e, &r); // SFindStruct()
        uint32 minor_base = ReadMacInt32(sp + spPointer) - ROMBaseMac;
        ROMBaseHost[minor_base + 0] = frame_base >> 24;
        ROMBaseHost[minor_base + 1] = frame_base >> 16;
        ROMBaseHost[minor_base + 2] = frame_base >> 8;
        ROMBaseHost[minor_base + 3] = frame_base;

        // Patch video mode parameter table
        WriteMacInt32(sp + spPointer, rsrc);
        WriteMacInt8(sp + spID, DepthToAppleMode(mode.depth));
        r.d[0] = 0x0006;
        Execute68kTrap(0xa06e, &r); // SFindStruct()
        WriteMacInt8(sp + spID, 0x01);
        r.d[0] = 0x0006;
        Execute68kTrap(0xa06e, &r); // SFindStruct()
        uint32 p = ReadMacInt32(sp + spPointer) - ROMBaseMac;
        ROMBaseHost[p +  8] = mode.bytes_per_row >> 8;
        ROMBaseHost[p +  9] = mode.bytes_per_row;
        ROMBaseHost[p + 14] = mode.y >> 8;
        ROMBaseHost[p + 15] = mode.y;
        ROMBaseHost[p + 16] = mode.x >> 8;
        ROMBaseHost[p + 17] = mode.x;

        // Recalculate slot ROM checksum
        ChecksumSlotROM();

        // Update sResource
        WriteMacInt8(sp + spID, ReadMacInt8(dce + dCtlSlotId));
        r.d[0] = 0x002b;
        Execute68kTrap(0xa06e, &r); // SUpdateSRT()

        // Update frame buffer base in DCE and param block
        WriteMacInt32(dce + dCtlDevBase, frame_base);
        WriteMacInt32(param + csBaseAddr, frame_base);

        // Patch frame buffer base address for MacOS versions <7.6
        if (!VidLocal.dm_present) { // Only do this when no Display Manager seems to be present; otherwise, the screen will not get redrawn
                WriteMacInt32(0x824, frame_base);                       // ScrnBase
                uint32 gdev = ReadMacInt32(0x8a4);                      // MainDevice
                gdev = ReadMacInt32(gdev);
                uint32 pmap = ReadMacInt32(gdev + 0x16);        // gdPMap
                pmap = ReadMacInt32(pmap);
                WriteMacInt32(pmap, frame_base);                        // baseAddr
        }
}


/*
 *  Driver Open() routine
 */

int16 VideoDriverOpen(uint32 pb, uint32 dce)
{
        D(bug("VideoDriverOpen\n"));

        // This shouldn't happen unless the platform-specific video code is broken
        if (VideoModes.empty())
                fprintf(stderr, "No valid video modes found (broken video driver?)\n");

        // Init local variables
        VidLocal.desc = &VideoMonitor;
        VidLocal.luminance_mapping = false;
        VidLocal.interrupts_enabled = false;
        VidLocal.current_mode = DepthToAppleMode(VidLocal.desc->mode.depth);
        VidLocal.current_id = VidLocal.desc->mode.resolution_id;
        VidLocal.preferred_mode = VidLocal.current_mode;
        VidLocal.preferred_id = VidLocal.current_id;
        VidLocal.dm_present = false;

        // Allocate Slot Manager parameter block in Mac RAM
        M68kRegisters r;
        r.d[0] = SIZEOF_SPBlock;
        Execute68kTrap(0xa71e, &r);     // NewPtrSysClear()
        if (r.a[0] == 0)
                return memFullErr;
        VidLocal.slot_param = r.a[0];
        D(bug("SPBlock at %08x\n", VidLocal.slot_param));

        // Find and set default gamma table
        VidLocal.gamma_table = 0;
        VidLocal.alloc_gamma_table_size = 0;
        set_gamma_table(0);

        // Init color palette (solid gray)
        set_gray_palette();
        return noErr;
}


/*
 *  Driver Control() routine
 */

int16 VideoDriverControl(uint32 pb, uint32 dce)
{
        uint16 code = ReadMacInt16(pb + csCode);
        uint32 param = ReadMacInt32(pb + csParam);
        D(bug("VideoDriverControl %d\n", code));
        switch (code) {

                case cscSetMode: {              // Set color depth
                        uint16 mode = ReadMacInt16(param + csMode);
                        D(bug(" SetMode %04x\n", mode));

                        // Set old base address in case the switch fails
                        WriteMacInt32(param + csBaseAddr, VidLocal.desc->mac_frame_base);

                        if (ReadMacInt16(param + csPage))
                                return paramErr;

                        if (mode != VidLocal.current_mode) {
                                vector<video_mode>::const_iterator i = find_mode(mode, VidLocal.current_id);
                                if (i == VideoModes.end())
                                        return paramErr;
                                switch_mode(*i, param, dce);
                        }
                        D(bug("  base %08x\n", VidLocal.desc->mac_frame_base));
                        return noErr;
                }

                case cscSetEntries:             // Set palette
                case cscDirectSetEntries: {
                        D(bug(" (Direct)SetEntries table %08x, count %d, start %d\n", ReadMacInt32(param + csTable), ReadMacInt16(param + csCount), ReadMacInt16(param + csStart)));
                        bool is_direct = IsDirectMode(VidLocal.desc->mode);
                        if (code == cscSetEntries && is_direct)
                                return controlErr;
                        if (code == cscDirectSetEntries && !is_direct)
                                return controlErr;

                        uint32 s_pal = ReadMacInt32(param + csTable);   // Source palette
                        uint8 *d_pal;                                                                   // Destination palette
                        uint16 start = ReadMacInt16(param + csStart);
                        uint16 count = ReadMacInt16(param + csCount);
                        if (s_pal == 0 || count > 255)
                                return paramErr;

                        // Find tables for gamma correction
                        uint8 *red_gamma, *green_gamma, *blue_gamma;
                        bool have_gamma = false;
                        int data_width = 0;
                        if (VidLocal.gamma_table) {
                                uint32 table = VidLocal.gamma_table;
                                red_gamma = Mac2HostAddr(table + gFormulaData + ReadMacInt16(table + gFormulaSize));
                                int chan_cnt = ReadMacInt16(table + gChanCnt);
                                if (chan_cnt == 1)
                                        green_gamma = blue_gamma = red_gamma;
                                else {
                                        int ofs = ReadMacInt16(table + gDataCnt);
                                        green_gamma = red_gamma + ofs;
                                        blue_gamma = green_gamma + ofs;
                                }
                                data_width = ReadMacInt16(table + gDataWidth);
                                have_gamma = true;
                        }

                        // Convert palette
                        if (start == 0xffff) {  // Indexed
                                for (uint32 i=0; i<=count; i++) {
                                        d_pal = VidLocal.palette + (ReadMacInt16(s_pal) & 0xff) * 3;
                                        uint8 red = (uint16)ReadMacInt16(s_pal + 2) >> 8;
                                        uint8 green = (uint16)ReadMacInt16(s_pal + 4) >> 8;
                                        uint8 blue = (uint16)ReadMacInt16(s_pal + 6) >> 8;
                                        if (VidLocal.luminance_mapping && !is_direct)
                                                red = green = blue = (red * 0x4ccc + green * 0x970a + blue * 0x1c29) >> 16;
                                        if (have_gamma) {
                                                red = red_gamma[red >> (8 - data_width)];
                                                green = green_gamma[green >> (8 - data_width)];
                                                blue = blue_gamma[blue >> (8 - data_width)];
                                        }
                                        *d_pal++ = red;
                                        *d_pal++ = green;
                                        *d_pal++ = blue;
                                        s_pal += 8;
                                }
                        } else {                                // Sequential
                                if (start + count > 255)
                                        return paramErr;
                                d_pal = VidLocal.palette + start * 3;
                                for (uint32 i=0; i<=count; i++) {
                                        uint8 red = (uint16)ReadMacInt16(s_pal + 2) >> 8;
                                        uint8 green = (uint16)ReadMacInt16(s_pal + 4) >> 8;
                                        uint8 blue = (uint16)ReadMacInt16(s_pal + 6) >> 8;
                                        if (VidLocal.luminance_mapping && !is_direct)
                                                red = green = blue = (red * 0x4ccc + green * 0x970a + blue * 0x1c29) >> 16;
                                        if (have_gamma) {
                                                red = red_gamma[red >> (8 - data_width)];
                                                green = green_gamma[green >> (8 - data_width)];
                                                blue = blue_gamma[blue >> (8 - data_width)];
                                        }
                                        *d_pal++ = red;
                                        *d_pal++ = green;
                                        *d_pal++ = blue;
                                        s_pal += 8;
                                }
                        }
                        video_set_palette(VidLocal.palette, palette_size(VidLocal.desc->mode.depth));
                        return noErr;
                }

                case cscSetGamma: {             // Set gamma table
                        uint32 user_table = ReadMacInt32(param + csGTable);
                        D(bug(" SetGamma %08x\n", user_table));
                        return set_gamma_table(user_table) ? noErr : memFullErr;
                }

                case cscGrayPage: {             // Fill page with dithered gray pattern
                        D(bug(" GrayPage %d\n", ReadMacInt16(param + csPage)));
                        if (ReadMacInt16(param + csPage))
                                return paramErr;

                        uint32 pattern[6] = {
                                0xaaaaaaaa,             // 1 bpp
                                0xcccccccc,             // 2 bpp
                                0xf0f0f0f0,             // 4 bpp
                                0xff00ff00,             // 8 bpp
                                0xffff0000,             // 16 bpp
                                0xffffffff              // 32 bpp
                        };
                        uint32 frame_base = VidLocal.desc->mac_frame_base;
                        uint32 pat = pattern[VidLocal.desc->mode.depth];
                        bool invert = (VidLocal.desc->mode.depth == VDEPTH_32BIT);
                        for (uint32 y=0; y<VidLocal.desc->mode.y; y++) {
                                for (uint32 x=0; x<VidLocal.desc->mode.bytes_per_row; x+=4) {
                                        WriteMacInt32(frame_base + x, pat);
                                        if (invert)
                                                pat = ~pat;
                                }
                                frame_base += VidLocal.desc->mode.bytes_per_row;
                                pat = ~pat;
                        }

                        if (IsDirectMode(VidLocal.desc->mode))
                                load_ramp_palette();

                        return noErr;
                }

                case cscSetGray:                // Enable/disable luminance mapping
                        D(bug(" SetGray %02x\n", ReadMacInt8(param + csMode)));
                        VidLocal.luminance_mapping = ReadMacInt8(param + csMode);
                        return noErr;

                case cscSetInterrupt:   // Enable/disable VBL
                        D(bug(" SetInterrupt %02x\n", ReadMacInt8(param + csMode)));
                        VidLocal.interrupts_enabled = (ReadMacInt8(param + csMode) == 0);
                        return noErr;

                case cscSetDefaultMode: { // Set default color depth
                        uint16 mode = ReadMacInt16(param + csMode);
                        D(bug(" SetDefaultMode %04x\n", mode));
                        VidLocal.preferred_mode = mode;
                        return noErr;
                }

                case cscSwitchMode: {   // Switch video mode (depth and resolution)
                        uint16 mode = ReadMacInt16(param + csMode);
                        uint32 id = ReadMacInt32(param + csData);
                        D(bug(" SwitchMode %04x, %08x\n", mode, id));

                        // Set old base address in case the switch fails
                        WriteMacInt32(param + csBaseAddr, VidLocal.desc->mac_frame_base);

                        if (ReadMacInt16(param + csPage))
                                return paramErr;

                        if (mode != VidLocal.current_mode || id != VidLocal.current_id) {
                                vector<video_mode>::const_iterator i = find_mode(mode, id);
                                if (i == VideoModes.end())
                                        return paramErr;
                                switch_mode(*i, param, dce);
                        }
                        D(bug("  base %08x\n", VidLocal.desc->mac_frame_base));
                        return noErr;
                }

                case cscSavePreferredConfiguration: {
                        uint16 mode = ReadMacInt16(param + csMode);
                        uint32 id = ReadMacInt32(param + csData);
                        D(bug(" SavePreferredConfiguration %04x, %08x\n", mode, id));
                        VidLocal.preferred_mode = mode;
                        VidLocal.preferred_id = id;
                        return noErr;
                }

                default:
                        printf("WARNING: Unknown VideoDriverControl(%d)\n", code);
                        return controlErr;
        }
}


/*
 *  Driver Status() routine
 */

int16 VideoDriverStatus(uint32 pb, uint32 dce)
{
        uint16 code = ReadMacInt16(pb + csCode);
        uint32 param = ReadMacInt32(pb + csParam);
        D(bug("VideoDriverStatus %d\n", code));
        switch (code) {

                case cscGetMode:                        // Get current color depth
                        D(bug(" GetMode -> %04x, base %08x\n", VidLocal.current_mode, VidLocal.desc->mac_frame_base));
                        WriteMacInt16(param + csMode, VidLocal.current_mode);
                        WriteMacInt16(param + csPage, 0);
                        WriteMacInt32(param + csBaseAddr, VidLocal.desc->mac_frame_base);
                        return noErr;

                case cscGetEntries: {           // Read palette
                        D(bug(" GetEntries table %08x, count %d, start %d\n", ReadMacInt32(param + csTable), ReadMacInt16(param + csCount), ReadMacInt16(param + csStart)));

                        uint8 *s_pal;                                                                   // Source palette
                        uint32 d_pal = ReadMacInt32(param + csTable);   // Destination palette
                        uint16 start = ReadMacInt16(param + csStart);
                        uint16 count = ReadMacInt16(param + csCount);
                        if (d_pal == 0 || count > 255)
                                return paramErr;

                        if (start == 0xffff) {  // Indexed
                                for (uint32 i=0; i<=count; i++) {
                                        s_pal = VidLocal.palette + (ReadMacInt16(d_pal) & 0xff) * 3;
                                        uint8 red = *s_pal++;
                                        uint8 green = *s_pal++;
                                        uint8 blue = *s_pal++;
                                        WriteMacInt16(d_pal + 2, red * 0x0101);
                                        WriteMacInt16(d_pal + 4, green * 0x0101);
                                        WriteMacInt16(d_pal + 6, blue * 0x0101);
                                        d_pal += 8;
                                }
                        } else {                                // Sequential
                                if (start + count > 255)
                                        return paramErr;
                                s_pal = VidLocal.palette + start * 3;
                                for (uint32 i=0; i<=count; i++) {
                                        uint8 red = *s_pal++;
                                        uint8 green = *s_pal++;
                                        uint8 blue = *s_pal++;
                                        WriteMacInt16(d_pal + 2, red * 0x0101);
                                        WriteMacInt16(d_pal + 4, green * 0x0101);
                                        WriteMacInt16(d_pal + 6, blue * 0x0101);
                                        d_pal += 8;
                                }
                        }
                        return noErr;
                }

                case cscGetPages:                       // Get number of pages
                        D(bug(" GetPages -> 1\n"));
                        WriteMacInt16(param + csPage, 1);
                        return noErr;

                case cscGetBaseAddress:         // Get page base address
                        D(bug(" GetBaseAddress -> %08x\n", VidLocal.desc->mac_frame_base));
                        WriteMacInt32(param + csBaseAddr, VidLocal.desc->mac_frame_base);
                        if (ReadMacInt16(param + csPage))
                                return paramErr;
                        else
                                return noErr;

                case cscGetGray:                        // Get luminance mapping flag
                        D(bug(" GetGray -> %d\n", VidLocal.luminance_mapping));
                        WriteMacInt16(param, VidLocal.luminance_mapping ? 0x0100 : 0);
                        return noErr;

                case cscGetInterrupt:           // Get interrupt disable flag
                        D(bug(" GetInterrupt -> %d\n", VidLocal.interrupts_enabled));
                        WriteMacInt16(param, VidLocal.interrupts_enabled ? 0 : 0x0100);
                        return noErr;

                case cscGetGamma:
                        D(bug(" GetGamma -> %08x\n", VidLocal.gamma_table));
                        WriteMacInt32(param + csGTable, VidLocal.gamma_table);
                        return noErr;

                case cscGetDefaultMode:         // Get default color depth
                        D(bug(" GetDefaultMode -> %04x\n", VidLocal.preferred_mode));
                        WriteMacInt16(param + csMode, VidLocal.preferred_mode);
                        return noErr;

                case cscGetCurrentMode:         // Get current video mode (depth and resolution)
                        D(bug(" GetCurMode -> %04x/%08x, base %08x\n", VidLocal.current_mode, VidLocal.current_id, VidLocal.desc->mac_frame_base));
                        WriteMacInt16(param + csMode, VidLocal.current_mode);
                        WriteMacInt32(param + csData, VidLocal.current_id);
                        WriteMacInt16(param + csPage, 0);
                        WriteMacInt32(param + csBaseAddr, VidLocal.desc->mac_frame_base);
                        return noErr;

                case cscGetConnection:          // Get monitor information
                        D(bug(" GetConnection\n"));
                        WriteMacInt16(param + csDisplayType, 8);                // Modeless connection
                        WriteMacInt8(param + csConnectTaggedType, 0);
                        WriteMacInt8(param + csConnectTaggedData, 0);
                        WriteMacInt32(param + csConnectFlags, 0x43);    // All modes valid and safe, non-standard tagging
                        WriteMacInt32(param + csDisplayComponent, 0);
                        return noErr;

                case cscGetModeTiming: {        // Get video timing for specified resolution
                        uint32 id = ReadMacInt32(param + csTimingMode);
                        D(bug(" GetModeTiming %08x\n", id));
                        if (!has_resolution(id))
                                return paramErr;

                        WriteMacInt32(param + csTimingFormat, FOURCC('d', 'e', 'c', 'l'));
                        WriteMacInt32(param + csTimingData, 0); // unknown
                        uint32 flags = 0xb; // mode valid, safe and shown in Monitors panel
                        if (id == VidLocal.preferred_id)
                                flags |= 4; // default mode
                        WriteMacInt32(param + csTimingFlags, flags);
                        return noErr;
                }

                case cscGetModeBaseAddress:     // Get frame buffer base address
                        D(bug(" GetModeBaseAddress -> base %08x\n", VidLocal.desc->mac_frame_base));
                        WriteMacInt32(param + csBaseAddr, VidLocal.desc->mac_frame_base);
                        return noErr;

                case cscGetPreferredConfiguration: // Get default video mode (depth and resolution)
                        D(bug(" GetPreferredConfiguration -> %04x/%08x\n", VidLocal.preferred_mode, VidLocal.preferred_id));
                        WriteMacInt16(param + csMode, VidLocal.preferred_mode);
                        WriteMacInt32(param + csData, VidLocal.preferred_id);
                        return noErr;

                case cscGetNextResolution: {    // Called iteratively to obtain a list of all supported resolutions
                        uint32 id = ReadMacInt32(param + csPreviousDisplayModeID);
                        D(bug(" GetNextResolution %08x\n", id));

                        switch (id) {
                                case 0:
                                        // Return current resolution
                                        id = VidLocal.current_id;
                                        break;

                                case 0xfffffffe:
                                        // Return first supported resolution
                                        id = 0x80;
                                        while (!has_resolution(id))
                                                id++;
                                        break;

                                default:
                                        // Get next resolution
                                        if (!has_resolution(id))
                                                return paramErr;
                                        id++;
                                        while (!has_resolution(id) && id < 0x100)
                                                id++;
                                        if (id == 0x100) { // No more resolutions
                                                WriteMacInt32(param + csRIDisplayModeID, 0xfffffffd);
                                                return noErr;
                                        }
                                        break;
                        }

                        WriteMacInt32(param + csRIDisplayModeID, id);
                        uint32 x, y;
                        get_size_of_resolution(id, x, y);
                        WriteMacInt32(param + csHorizontalPixels, x);
                        WriteMacInt32(param + csVerticalLines, y);
                        WriteMacInt32(param + csRefreshRate, 75 << 16);
                        WriteMacInt16(param + csMaxDepthMode, DepthToAppleMode(max_depth_of_resolution(id)));
                        return noErr;
                }

                case cscGetVideoParameters: {   // Get information about specified resolution/depth
                        uint32 id = ReadMacInt32(param + csDisplayModeID);
                        uint16 mode = ReadMacInt16(param + csDepthMode);
                        D(bug(" GetVideoParameters %04x/%08x\n", mode, id));
                        VidLocal.dm_present = true;     // Display Manager seems to be present

                        vector<video_mode>::const_iterator i, end = VideoModes.end();
                        for (i = VideoModes.begin(); i != end; ++i) {
                                if (DepthToAppleMode(i->depth) == mode && i->resolution_id == id) {
                                        uint32 vp = ReadMacInt32(param + csVPBlockPtr);
                                        WriteMacInt32(vp + vpBaseOffset, 0);
                                        WriteMacInt16(vp + vpRowBytes, i->bytes_per_row);
                                        WriteMacInt16(vp + vpBounds, 0);
                                        WriteMacInt16(vp + vpBounds + 2, 0);
                                        WriteMacInt16(vp + vpBounds + 4, i->y);
                                        WriteMacInt16(vp + vpBounds + 6, i->x);
                                        WriteMacInt16(vp + vpVersion, 0);
                                        WriteMacInt16(vp + vpPackType, 0);
                                        WriteMacInt32(vp + vpPackSize, 0);
                                        WriteMacInt32(vp + vpHRes, 0x00480000); // 72 dpi
                                        WriteMacInt32(vp + vpVRes, 0x00480000);
                                        uint32 pix_type, pix_size, cmp_count, cmp_size, dev_type;
                                        switch (i->depth) {
                                                case VDEPTH_1BIT:
                                                        pix_type = 0; pix_size = 1;
                                                        cmp_count = 1; cmp_size = 1;
                                                        dev_type = 0; // CLUT
                                                        break;
                                                case VDEPTH_2BIT:
                                                        pix_type = 0; pix_size = 2;
                                                        cmp_count = 1; cmp_size = 2;
                                                        dev_type = 0; // CLUT
                                                        break;
                                                case VDEPTH_4BIT:
                                                        pix_type = 0; pix_size = 4;
                                                        cmp_count = 1; cmp_size = 4;
                                                        dev_type = 0; // CLUT
                                                        break;
                                                case VDEPTH_8BIT:
                                                        pix_type = 0; pix_size = 8;
                                                        cmp_count = 1; cmp_size = 8;
                                                        dev_type = 0; // CLUT
                                                        break;
                                                case VDEPTH_16BIT:
                                                        pix_type = 0x10; pix_size = 16;
                                                        cmp_count = 3; cmp_size = 5;
                                                        dev_type = 2; // direct
                                                        break;
                                                case VDEPTH_32BIT:
                                                        pix_type = 0x10; pix_size = 32;
                                                        cmp_count = 3; cmp_size = 8;
                                                        dev_type = 2; // direct
                                                        break;
                                        }
                                        WriteMacInt16(vp + vpPixelType, pix_type);
                                        WriteMacInt16(vp + vpPixelSize, pix_size);
                                        WriteMacInt16(vp + vpCmpCount, cmp_count);
                                        WriteMacInt16(vp + vpCmpSize, cmp_size);
                                        WriteMacInt32(param + csPageCount, 1);
                                        WriteMacInt32(param + csDeviceType, dev_type);
                                        return noErr;
                                }
                        }
                        return paramErr; // specified resolution/depth not supported
                }

                default:
                        printf("WARNING: Unknown VideoDriverStatus(%d)\n", code);
                        return statusErr;
        }
}
Revision:	1.20
Committed:	2001-07-03T19:20:38Z (23 years, 4 months ago) by cebix
Branch:	MAIN
Changes since 1.19:	+72 -6 lines
Log Message:	- improved compatibility of multiple depth/resolution handling with versions of MacOS before 7.6: - Apple mode IDs are now allocated contiguously from 0x80 (the video_*.cpp module must call video_init_depth_list() after adding all modes) - if the video driver didn't receive a GetVideoParameters call, it patches ScrnBase and the main GDevice upon a video mode switch (otherwise MacOS will continue to use the old frame buffer base) - the rowBytes values in the video parameters slot resources are correct for all bit depths