/*
DingusPPC - The Experimental PowerPC Macintosh emulator
Copyright (C) 2018-24 divingkatae and maximum
                      (theweirdo)     spatium

(Contact divingkatae#1017 or powermax#2286 on Discord for more info)

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 3 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, see <https://www.gnu.org/licenses/>.
*/

/** ATI Mach64 GX definitions. */

#ifndef ATI_MACH64_GX_H
#define ATI_MACH64_GX_H

#include <devices/common/pci/pcidevice.h>
#include <devices/video/displayid.h>
#include <devices/video/videoctrl.h>
#include <devices/video/atimach64defs.h>

#include <cinttypes>
#include <memory>

class AtiMach64Gx : public PCIDevice, public VideoCtrlBase {
public:
    AtiMach64Gx();
    ~AtiMach64Gx() = default;

    static std::unique_ptr<HWComponent> create() {
        return std::unique_ptr<AtiMach64Gx>(new AtiMach64Gx());
    }

    // PCI device methods
    bool supports_io_space(void) {
        return true;
    };

    // I/O space access methods
    bool pci_io_read(uint32_t offset, uint32_t size, uint32_t* res);
    bool pci_io_write(uint32_t offset, uint32_t value, uint32_t size);

    // HWComponent methods
    int device_postinit();

    // MMIODevice methods
    uint32_t read(uint32_t rgn_start, uint32_t offset, int size);
    void write(uint32_t rgn_start, uint32_t offset, uint32_t value, int size);

protected:
    void notify_bar_change(int bar_num);
    const char* get_reg_name(uint32_t reg_offset);
    const char* rgb514_get_reg_name(uint32_t reg_offset);
    bool io_access_allowed(uint32_t offset);
    uint32_t read_reg(uint32_t reg_offset, uint32_t size);
    void write_reg(uint32_t reg_offset, uint32_t value, uint32_t size);
    void crtc_update();
    void rgb514_write_reg(uint8_t reg_addr, uint8_t value);
    void rgb514_write_ind_reg(uint8_t reg_addr, uint8_t value);
    void verbose_pixel_format(int crtc_index);
    void draw_hw_cursor(uint8_t *dst_buf, int dst_pitch);
    void get_cursor_position(int& x, int& y);

private:
    void change_one_bar(uint32_t &aperture, uint32_t aperture_size, uint32_t aperture_new, int bar_num);

    uint32_t    regs[256] = {}; // internal registers

    int         vram_size;

    // main aperture (16MB)
    const uint32_t aperture_count = 1;
    const uint32_t aperture_size[1] = { 0x1000000 };
    const uint32_t aperture_flag[1] = { 0 };
    uint32_t aperture_base[1] = { 0 };

    uint32_t    config_cntl[2] = { 2, 0 };
    uint32_t    mm_regs_offset = MM_REGS_0_OFF;

    // RGB514 RAMDAC state
    uint8_t     dac_idx_lo = 0;
    uint8_t     dac_idx_hi = 0;
    uint8_t     clut_index = 0;
    uint8_t     comp_index = 0;
    uint8_t     clut_color[3] = {0};
    uint8_t     dac_regs[256] = {0};

    std::unique_ptr<DisplayID>  disp_id;
    std::unique_ptr<uint8_t[]>  vram_ptr;
};

#endif // ATI_MACH64_GX_H