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 palette_pc[64];
  24         uint8 screen[240][256 + 16];    // 2*8 = side margin
  25         uint8 solid_buf[512];
  26
  27         uint8* banks[16];
  28         uint8 header[16];
  29         uint8 chr_rom[0x2000];
  30         uint8 name_tables[0x1000];
  31         uint8 spr_ram[0x100];
  32         uint8 bg_pal[0x10];
  33         uint8 spr_pal[0x10];
  34         uint8 spr_ram_rw_ptr;
  35
  36         uint8 regs[8];
  37         uint16 bg_pattern_table_addr;
  38         uint16 spr_pattern_table_addr;
  39         uint16 ppu_addr_inc;
  40         uint8 rgb_bak;
  41         bool toggle_2005_2006;
  42         uint8 read_2007_buffer;
  43
  44         uint16 loopy_v;
  45         uint16 loopy_t;
  46         uint8 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         ~PPU() {}
  56
  57         // common functions
  58         void initialize();
  59         void reset();
  60         void write_data8(uint32 addr, uint32 data);
  61         uint32 read_data8(uint32 addr);
  62         void event_vline(int v, int clock);
  63         void save_state(FILEIO* state_fio);
  64         bool load_state(FILEIO* state_fio);
  65
  66         // unique functions
  67         void set_context_cpu(DEVICE* device)
  68         {
  69                 d_cpu = device;
  70         }
  71         uint8 *get_spr_ram()
  72         {
  73                 return spr_ram;
  74         }
  75         void load_rom_image(_TCHAR *file_name);
  76         void draw_screen();
  77 };
  78
  79 #endif