source/src/vm/familybasic/ppu.h

   1 /*
   2         Nintendo Family BASIC Emulator 'eFamilyBASIC'
   3
   4         Origin : nester
   5         Author : Takeda.Toshiya
   6         Date   : 2010.08.11-
   7
   8         [ PPU ]
   9 */
  10
  11 #ifndef _PPU_H_
  12 #define _PPU_H_
  13
  14 #include "../vm.h"
  15 #include "../../emu.h"
  16 #include "../device.h"
  17
  18 class PPU : public DEVICE
  19 {
  20 private:
  21         DEVICE *d_cpu;
  22
  23         scrntype_t palette_pc[64];
  24         uint8_t screen[240][256 + 16];  // 2*8 = side margin
  25         uint8_t solid_buf[512];
  26
  27         uint8_t* banks[16];
  28         uint8_t header[16];
  29         uint8_t chr_rom[0x2000];
  30         uint8_t name_tables[0x1000];
  31         uint8_t spr_ram[0x100];
  32         uint8_t bg_pal[0x10];
  33         uint8_t spr_pal[0x10];
  34         uint8_t spr_ram_rw_ptr;
  35
  36         uint8_t regs[8];
  37         uint16_t bg_pattern_table_addr;
  38         uint16_t spr_pattern_table_addr;
  39         uint16_t ppu_addr_inc;
  40         uint8_t rgb_bak;
  41         bool toggle_2005_2006;
  42         uint8_t read_2007_buffer;
  43
  44         uint16_t loopy_v;
  45         uint16_t loopy_t;
  46         uint8_t loopy_x;
  47
  48         void render_scanline(int v);
  49         void render_bg(int v);
  50         void render_spr(int v);
  51         void update_palette();
  52
  53 public:
  54         PPU(VM* parent_vm, EMU* parent_emu) : DEVICE(parent_vm, parent_emu)
  55         {
  56                 set_device_name(_T("PPU"));
  57         }
  58         ~PPU() {}
  59
  60         // common functions
  61         void initialize();
  62         void reset();
  63         void write_data8(uint32_t addr, uint32_t data);
  64         uint32_t read_data8(uint32_t addr);
  65         void event_vline(int v, int clock);
  66         void save_state(FILEIO* state_fio);
  67         bool load_state(FILEIO* state_fio);
  68
  69         // unique functions
  70         void set_context_cpu(DEVICE* device)
  71         {
  72                 d_cpu = device;
  73         }
  74         uint8_t *get_spr_ram()
  75         {
  76                 return spr_ram;
  77         }
  78         void load_rom_image(const _TCHAR *file_name);
  79         void draw_screen();
  80 };
  81
  82 #endif