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authorGravatarGravatar Miodrag Milanovic <mmicko@gmail.com>2015-09-13 08:41:44 +0200
committerGravatarGravatar Miodrag Milanovic <mmicko@gmail.com>2015-09-13 08:41:44 +0200
commitf88cefad27a1737c76e09d99c9fb43e173506081 (patch)
tree2d8167d03579c46e226471747eb4407bd00ed6fa /src/devices/video/snes_ppu.h
parente92ac9e0fa8e99869894bea00589bbb526be30aa (diff)
Move all devices into separate part of src tree (nw)
Diffstat (limited to 'src/devices/video/snes_ppu.h')
-rw-r--r--src/devices/video/snes_ppu.h295
1 files changed, 295 insertions, 0 deletions
diff --git a/src/devices/video/snes_ppu.h b/src/devices/video/snes_ppu.h
new file mode 100644
index 00000000000..806865a0729
--- /dev/null
+++ b/src/devices/video/snes_ppu.h
@@ -0,0 +1,295 @@
+// license:BSD-3-Clause
+// copyright-holders:Anthony Kruize, Fabio Priuli
+/***************************************************************************
+
+ SNES PPU
+
+***************************************************************************/
+
+#pragma once
+
+#ifndef __SNES_PPU_H__
+#define __SNES_PPU_H__
+
+
+#define MCLK_NTSC (21477272) /* verified */
+#define MCLK_PAL (21218370) /* verified */
+
+#define DOTCLK_NTSC (MCLK_NTSC/4)
+#define DOTCLK_PAL (MCLK_PAL/4)
+
+#define SNES_SCR_WIDTH 256 /* 32 characters 8 pixels wide */
+#define SNES_SCR_HEIGHT_NTSC 225 /* Can be 224 or 240 height */
+#define SNES_SCR_HEIGHT_PAL 240 /* ??? */
+#define SNES_VTOTAL_NTSC 262 /* Maximum number of lines for NTSC systems */
+#define SNES_VTOTAL_PAL 312 /* Maximum number of lines for PAL systems */
+#define SNES_HTOTAL 341 /* Maximum number pixels per line (incl. hblank) */
+
+#define SNES_NTSC 0x00
+#define SNES_PAL 0x10
+
+
+#define SNES_LAYER_DEBUG 0
+
+
+/* offset-per-tile modes */
+enum
+{
+ SNES_OPT_NONE = 0,
+ SNES_OPT_MODE2,
+ SNES_OPT_MODE4,
+ SNES_OPT_MODE6
+};
+
+/* layers */
+enum
+{
+ SNES_BG1 = 0,
+ SNES_BG2,
+ SNES_BG3,
+ SNES_BG4,
+ SNES_OAM,
+ SNES_COLOR
+};
+
+
+struct SNES_SCANLINE
+{
+ int enable, clip;
+
+ UINT16 buffer[SNES_SCR_WIDTH];
+ UINT8 priority[SNES_SCR_WIDTH];
+ UINT8 layer[SNES_SCR_WIDTH];
+ UINT8 blend_exception[SNES_SCR_WIDTH];
+};
+
+// ======================> snes_ppu_device
+
+class snes_ppu_device : public device_t,
+ public device_video_interface
+{
+public:
+ // construction/destruction
+ snes_ppu_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ // inline configuration helpers
+ template<class _Object> static devcb_base &static_set_open_bus_callback(device_t &device, _Object object) { return downcast<snes_ppu_device &>(device).m_openbus_cb.set_callback(object); }
+
+ UINT8 m_regs[0x40];
+
+ SNES_SCANLINE m_scanlines[2];
+
+ struct
+ {
+ /* clipmasks */
+ UINT8 window1_enabled, window1_invert;
+ UINT8 window2_enabled, window2_invert;
+ UINT8 wlog_mask;
+ /* color math enabled */
+ UINT8 color_math;
+
+ UINT8 charmap;
+ UINT8 tilemap;
+ UINT8 tilemap_size;
+
+ UINT8 tile_size;
+ UINT8 mosaic_enabled; // actually used only for layers 0->3!
+
+ UINT8 main_window_enabled;
+ UINT8 sub_window_enabled;
+ UINT8 main_bg_enabled;
+ UINT8 sub_bg_enabled;
+
+ UINT16 hoffs;
+ UINT16 voffs;
+ } m_layer[6]; // this is for the BG1 - BG2 - BG3 - BG4 - OBJ - color layers
+
+ struct
+ {
+ UINT8 address_low;
+ UINT8 address_high;
+ UINT8 saved_address_low;
+ UINT8 saved_address_high;
+ UINT16 address;
+ UINT16 priority_rotation;
+ UINT8 next_charmap;
+ UINT8 next_size;
+ UINT8 size;
+ UINT32 next_name_select;
+ UINT32 name_select;
+ UINT8 first_sprite;
+ UINT8 flip;
+ UINT16 write_latch;
+ } m_oam;
+
+ struct
+ {
+ UINT16 latch_horz;
+ UINT16 latch_vert;
+ UINT16 current_vert;
+ UINT8 last_visible_line;
+ UINT8 interlace_count;
+ } m_beam;
+
+ struct
+ {
+ UINT8 repeat;
+ UINT8 hflip;
+ UINT8 vflip;
+ INT16 matrix_a;
+ INT16 matrix_b;
+ INT16 matrix_c;
+ INT16 matrix_d;
+ INT16 origin_x;
+ INT16 origin_y;
+ UINT16 hor_offset;
+ UINT16 ver_offset;
+ UINT8 extbg;
+ } m_mode7;
+
+ struct OAM
+ {
+ UINT16 tile;
+ INT16 x, y;
+ UINT8 size, vflip, hflip, priority_bits, pal;
+ int height, width;
+ };
+
+ struct OAM m_oam_spritelist[SNES_SCR_WIDTH / 2];
+
+ UINT8 m_oam_itemlist[32];
+
+ struct TILELIST {
+ INT16 x;
+ UINT16 priority, pal, tileaddr;
+ int hflip;
+ };
+
+ struct TILELIST m_oam_tilelist[34];
+
+#if SNES_LAYER_DEBUG
+ struct DEBUGOPTS
+ {
+ UINT8 bg_disabled[5];
+ UINT8 mode_disabled[8];
+ UINT8 draw_subscreen;
+ UINT8 windows_disabled;
+ UINT8 mosaic_disabled;
+ UINT8 colormath_disabled;
+ UINT8 sprite_reversed;
+ UINT8 select_pri[5];
+ };
+ struct DEBUGOPTS m_debug_options;
+#endif
+
+ UINT8 m_mosaic_size;
+ UINT8 m_clip_to_black;
+ UINT8 m_prevent_color_math;
+ UINT8 m_sub_add_mode;
+ UINT8 m_bg3_priority_bit;
+ UINT8 m_direct_color;
+ UINT8 m_ppu_last_scroll; /* as per Anomie's doc and Theme Park, all scroll regs shares (but mode 7 ones) the same
+ 'previous' scroll value */
+ UINT8 m_mode7_last_scroll; /* as per Anomie's doc mode 7 scroll regs use a different value, shared with mode 7 matrix! */
+
+ UINT8 m_ppu1_open_bus, m_ppu2_open_bus;
+ UINT8 m_ppu1_version, m_ppu2_version;
+ UINT8 m_window1_left, m_window1_right, m_window2_left, m_window2_right;
+
+ UINT16 m_mosaic_table[16][4096];
+ UINT8 m_clipmasks[6][SNES_SCR_WIDTH];
+ UINT8 m_update_windows;
+ UINT8 m_update_offsets;
+ UINT8 m_update_oam_list;
+ UINT8 m_mode;
+ UINT8 m_interlace; //doubles the visible resolution
+ UINT8 m_obj_interlace;
+ UINT8 m_screen_brightness;
+ UINT8 m_screen_disabled;
+ UINT8 m_pseudo_hires;
+ UINT8 m_color_modes;
+ UINT8 m_stat77;
+ UINT8 m_stat78;
+
+ UINT16 m_htmult; /* in 512 wide, we run HTOTAL double and halve it on latching */
+ UINT16 m_cgram_address; /* CGRAM address */
+ UINT8 m_read_ophct;
+ UINT8 m_read_opvct;
+ UINT16 m_vram_fgr_high;
+ UINT16 m_vram_fgr_increment;
+ UINT16 m_vram_fgr_count;
+ UINT16 m_vram_fgr_mask;
+ UINT16 m_vram_fgr_shift;
+ UINT16 m_vram_read_buffer;
+ UINT16 m_vmadd;
+
+ inline UINT16 get_bgcolor(UINT8 direct_colors, UINT16 palette, UINT8 color);
+ inline void set_scanline_pixel(int screen, INT16 x, UINT16 color, UINT8 priority, UINT8 layer, int blend);
+ inline void draw_bgtile_lores(UINT8 layer, INT16 ii, UINT8 colour, UINT16 pal, UINT8 direct_colors, UINT8 priority);
+ inline void draw_bgtile_hires(UINT8 layer, INT16 ii, UINT8 colour, UINT16 pal, UINT8 direct_colors, UINT8 priority);
+ inline void draw_oamtile(INT16 ii, UINT8 colour, UINT16 pal, UINT8 priority);
+ inline void draw_tile(UINT8 planes, UINT8 layer, UINT32 tileaddr, INT16 x, UINT8 priority, UINT8 flip, UINT8 direct_colors, UINT16 pal, UINT8 hires);
+ inline UINT32 get_tmap_addr(UINT8 layer, UINT8 tile_size, UINT32 base, UINT32 x, UINT32 y);
+ inline void update_line(UINT16 curline, UINT8 layer, UINT8 priority_b, UINT8 priority_a, UINT8 color_depth, UINT8 hires, UINT8 offset_per_tile, UINT8 direct_colors);
+ void update_line_mode7(UINT16 curline, UINT8 layer, UINT8 priority_b, UINT8 priority_a);
+ void update_obsel(void);
+ void oam_list_build(void);
+ int is_sprite_on_scanline(UINT16 curline, UINT8 sprite);
+ void update_objects_rto(UINT16 curline);
+ void update_objects(UINT8 priority_oam0, UINT8 priority_oam1, UINT8 priority_oam2, UINT8 priority_oam3);
+ void update_mode_0(UINT16 curline);
+ void update_mode_1(UINT16 curline);
+ void update_mode_2(UINT16 curline);
+ void update_mode_3(UINT16 curline);
+ void update_mode_4(UINT16 curline);
+ void update_mode_5(UINT16 curline);
+ void update_mode_6(UINT16 curline);
+ void update_mode_7(UINT16 curline);
+ void draw_screens(UINT16 curline);
+ void update_windowmasks(void);
+ void update_offsets(void);
+ inline void draw_blend(UINT16 offset, UINT16 *colour, UINT8 prevent_color_math, UINT8 black_pen_clip, int switch_screens);
+ void refresh_scanline(bitmap_rgb32 &bitmap, UINT16 curline);
+
+ inline INT16 current_x() { return m_screen->hpos() / m_htmult; }
+ inline INT16 current_y() { return m_screen->vpos(); }
+ void set_latch_hv(INT16 x, INT16 y);
+ void dynamic_res_change();
+ inline UINT32 get_vram_address();
+ UINT8 dbg_video(UINT16 curline);
+
+ UINT8 read(address_space &space, UINT32 offset, UINT8 wrio_bit7);
+ void write(address_space &space, UINT32 offset, UINT8 data);
+
+ DECLARE_READ8_MEMBER( oam_read );
+ DECLARE_WRITE8_MEMBER( oam_write );
+ DECLARE_READ8_MEMBER( cgram_read );
+ DECLARE_WRITE8_MEMBER( cgram_write );
+ DECLARE_READ8_MEMBER( vram_read );
+ DECLARE_WRITE8_MEMBER( vram_write );
+ UINT16 *m_oam_ram; /* Object Attribute Memory */
+ UINT16 *m_cgram; /* Palette RAM */
+ UINT8 *m_vram; /* Video RAM (TODO: Should be 16-bit, but it's easier this way) */
+
+protected:
+ // device-level overrides
+ virtual void device_start();
+ virtual void device_reset();
+
+private:
+ devcb_read16 m_openbus_cb;
+};
+
+
+// device type definition
+extern const device_type SNES_PPU;
+
+
+/***************************************************************************
+ INTERFACE CONFIGURATION MACROS
+ ***************************************************************************/
+
+#define MCFG_SNES_PPU_OPENBUS_CB(_read) \
+ devcb = &snes_ppu_device::static_set_open_bus_callback(*device, DEVCB_##_read);
+
+#endif