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mame/src/emu/drawgfx.h
Miodrag Milanovic 0e19f641d3 Cleanups and version bump
2013-01-11 07:32:46 +00:00

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/*********************************************************************
drawgfx.h
Generic graphic functions.
Copyright Nicola Salmoria and the MAME Team.
Visit http://mamedev.org for licensing and usage restrictions.
*********************************************************************/
#pragma once
#ifndef __EMU_H__
#error Dont include this file directly; include emu.h instead.
#endif
#ifndef __DRAWGFX_H__
#define __DRAWGFX_H__
/***************************************************************************
CONSTANTS
***************************************************************************/
#define MAX_GFX_PLANES 8
#define MAX_GFX_SIZE 32
#define MAX_ABS_GFX_SIZE 1024
#define EXTENDED_XOFFS { 0 }
#define EXTENDED_YOFFS { 0 }
#define GFX_RAW 0x12345678
// When planeoffset[0] is set to GFX_RAW, the gfx data is left as-is, with no conversion.
// No buffer is allocated for the decoded data, and gfxdata is set to point to the source
// data.
// xoffset[0] is an optional displacement (*8) from the beginning of the source data, while
// yoffset[0] is the line modulo (*8) and charincrement the char modulo (*8). They are *8
// for consistency with the usual behaviour, but the bottom 3 bits are not used.
// This special mode can be used to save memory in games that require several different
// handlings of the same ROM data (e.g. metro.c can use both 4bpp and 8bpp tiles, and both
// 8x8 and 16x16; cps.c has 8x8, 16x16 and 32x32 tiles all fetched from the same ROMs).
enum
{
DRAWMODE_NONE,
DRAWMODE_SOURCE,
DRAWMODE_SHADOW
};
/***************************************************************************
MACROS
***************************************************************************/
// these macros describe gfx_layouts in terms of fractions of a region
// they can be used for total, planeoffset, xoffset, yoffset
#define RGN_FRAC(num,den) (0x80000000 | (((num) & 0x0f) << 27) | (((den) & 0x0f) << 23))
#define IS_FRAC(offset) ((offset) & 0x80000000)
#define FRAC_NUM(offset) (((offset) >> 27) & 0x0f)
#define FRAC_DEN(offset) (((offset) >> 23) & 0x0f)
#define FRAC_OFFSET(offset) ((offset) & 0x007fffff)
// these macros are useful in gfx_layouts
#define STEP2(START,STEP) (START),(START)+(STEP)
#define STEP4(START,STEP) STEP2(START,STEP),STEP2((START)+2*(STEP),STEP)
#define STEP8(START,STEP) STEP4(START,STEP),STEP4((START)+4*(STEP),STEP)
#define STEP16(START,STEP) STEP8(START,STEP),STEP8((START)+8*(STEP),STEP)
#define STEP32(START,STEP) STEP16(START,STEP),STEP16((START)+16*(STEP),STEP)
#define STEP64(START,STEP) STEP32(START,STEP),STEP32((START)+32*(STEP),STEP)
#define STEP128(START,STEP) STEP64(START,STEP),STEP64((START)+64*(STEP),STEP)
#define STEP256(START,STEP) STEP128(START,STEP),STEP128((START)+128*(STEP),STEP)
#define STEP512(START,STEP) STEP256(START,STEP),STEP256((START)+256*(STEP),STEP)
#define STEP1024(START,STEP) STEP512(START,STEP),STEP512((START)+512*(STEP),STEP)
#define STEP2048(START,STEP) STEP1024(START,STEP),STEP1024((START)+1024*(STEP),STEP)
// these macros are used for declaring gfx_decode_entry_entry info arrays.
#define GFXDECODE_NAME( name ) gfxdecodeinfo_##name
#define GFXDECODE_EXTERN( name ) extern const gfx_decode_entry GFXDECODE_NAME(name)[]
#define GFXDECODE_START( name ) const gfx_decode_entry GFXDECODE_NAME(name)[] = {
#define GFXDECODE_ENTRY(region,offset,layout,start,colors) { region, offset, &layout, start, colors, 0, 0 },
#define GFXDECODE_SCALE(region,offset,layout,start,colors,xscale,yscale) { region, offset, &layout, start, colors, xscale, yscale },
#define GFXDECODE_END { 0 } };
// these macros are used for declaring gfx_layout structures.
#define GFXLAYOUT_RAW( name, width, height, linemod, charmod ) \
const gfx_layout name = { width, height, RGN_FRAC(1,1), 8, { GFX_RAW }, { 0 }, { linemod }, charmod };
/***************************************************************************
TYPE DEFINITIONS
***************************************************************************/
struct gfx_layout
{
UINT32 xoffs(int x) const { return (extxoffs != NULL) ? extxoffs[x] : xoffset[x]; }
UINT32 yoffs(int y) const { return (extyoffs != NULL) ? extyoffs[y] : yoffset[y]; }
UINT16 width; // pixel width of each element
UINT16 height; // pixel height of each element
UINT32 total; // total number of elements, or RGN_FRAC()
UINT16 planes; // number of bitplanes
UINT32 planeoffset[MAX_GFX_PLANES]; // bit offset of each bitplane
UINT32 xoffset[MAX_GFX_SIZE]; // bit offset of each horizontal pixel
UINT32 yoffset[MAX_GFX_SIZE]; // bit offset of each vertical pixel
UINT32 charincrement; // distance between two consecutive elements (in bits)
const UINT32 * extxoffs; // extended X offset array for really big layouts
const UINT32 * extyoffs; // extended Y offset array for really big layouts
};
class gfx_element
{
public:
// construction/destruction
gfx_element(running_machine &machine);
gfx_element(running_machine &machine, const gfx_layout &gl, const UINT8 *srcdata, UINT32 total_colors, UINT32 color_base);
gfx_element(running_machine &machine, UINT8 *base, UINT32 width, UINT32 height, UINT32 rowbytes, UINT32 color_base, UINT32 color_granularity);
// getters
running_machine &machine() const { return m_machine; }
UINT16 width() const { return m_width; }
UINT16 height() const { return m_height; }
UINT32 elements() const { return m_total_elements; }
UINT32 colorbase() const { return m_color_base; }
UINT16 depth() const { return m_color_depth; }
UINT16 granularity() const { return m_color_granularity; }
UINT32 colors() const { return m_total_colors; }
UINT32 rowbytes() const { return m_line_modulo; }
bool has_pen_usage() const { return (m_pen_usage.count() > 0); }
// a bit gross that people muck with this stuff...
const UINT8 *srcdata() const { return m_srcdata; }
UINT32 dirtyseq() const { return m_dirtyseq; }
UINT32 *pen_usage() { return &m_pen_usage[0]; }
// setters
void set_layout(const gfx_layout &gl, const UINT8 *srcdata);
void set_raw_layout(const UINT8 *srcdata, UINT32 width, UINT32 height, UINT32 total, UINT32 linemod, UINT32 charmod);
void set_source(const UINT8 *source) { m_srcdata = source; if (m_layout_is_raw) m_gfxdata = const_cast<UINT8 *>(source); memset(m_dirty, 1, elements()); }
void set_colors(UINT32 colors) { m_total_colors = colors; }
void set_colorbase(UINT16 colorbase) { m_color_base = colorbase; }
void set_granularity(UINT16 granularity) { m_color_granularity = granularity; }
void set_source_clip(UINT32 xoffs, UINT32 width, UINT32 yoffs, UINT32 height);
// operations
void mark_dirty(UINT32 code) { if (code < elements()) { m_dirty[code] = 1; m_dirtyseq++; } }
void mark_all_dirty() { memset(&m_dirty[0], 1, elements()); }
void decode(UINT32 code);
const UINT8 *get_data(UINT32 code)
{
assert(code < elements());
if (code < m_dirty.count() && m_dirty[code]) decode(code);
return m_gfxdata + code * m_char_modulo + m_starty * m_line_modulo + m_startx;
}
UINT32 pen_usage(UINT32 code)
{
assert(code < m_pen_usage.count());
if (m_dirty[code]) decode(code);
return m_pen_usage[code];
}
private:
// internal state
UINT16 m_width; // current pixel width of each element (changeble with source clipping)
UINT16 m_height; // current pixel height of each element (changeble with source clipping)
UINT16 m_startx; // current source clip X offset
UINT16 m_starty; // current source clip Y offset
UINT16 m_origwidth; // starting pixel width of each element
UINT16 m_origheight; // staring pixel height of each element
UINT32 m_total_elements; // total number of decoded elements
UINT32 m_color_base; // base color for rendering
UINT16 m_color_depth; // number of colors each pixel can represent
UINT16 m_color_granularity; // number of colors for each color code
UINT32 m_total_colors; // number of color codes
UINT32 m_line_modulo; // bytes between each row of data
UINT32 m_char_modulo; // bytes between each element
const UINT8 * m_srcdata; // pointer to the source data for decoding
UINT32 m_dirtyseq; // sequence number; incremented each time a tile is dirtied
UINT8 * m_gfxdata; // pointer to decoded pixel data, 8bpp
dynamic_buffer m_gfxdata_allocated; // allocated decoded pixel data, 8bpp
dynamic_buffer m_dirty; // dirty array for detecting chars that need decoding
dynamic_array<UINT32> m_pen_usage; // bitmask of pens that are used (pens 0-31 only)
bool m_layout_is_raw; // raw layout?
UINT8 m_layout_planes; // bit planes in the layout
UINT32 m_layout_charincrement; // per-character increment in source data
dynamic_array<UINT32> m_layout_planeoffset;// plane offsets
dynamic_array<UINT32> m_layout_xoffset; // X offsets
dynamic_array<UINT32> m_layout_yoffset; // Y offsets
running_machine &m_machine; // pointer to the owning machine
};
struct gfx_decode_entry
{
const char * memory_region; // memory region where the data resides
UINT32 start; // offset of beginning of data to decode
const gfx_layout *gfxlayout; // pointer to gfx_layout describing the layout; NULL marks the end of the array
UINT16 color_codes_start; // offset in the color lookup table where color codes start
UINT16 total_color_codes; // total number of color codes
UINT8 xscale; // optional horizontal scaling factor; 0 means 1x
UINT8 yscale; // optional vertical scaling factor; 0 means 1x
};
/***************************************************************************
FUNCTION PROTOTYPES
***************************************************************************/
// ----- graphics elements -----
// allocate memory for the graphics elements referenced by a machine
void gfx_init(running_machine &machine);
// ----- core graphics drawing -----
// specific drawgfx implementations for each transparency type
void drawgfx_opaque(bitmap_ind16 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty);
void drawgfx_opaque(bitmap_rgb32 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty);
void drawgfx_transpen(bitmap_ind16 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, UINT32 transpen);
void drawgfx_transpen(bitmap_rgb32 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, UINT32 transpen);
void drawgfx_transpen_raw(bitmap_ind16 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, UINT32 transpen);
void drawgfx_transpen_raw(bitmap_rgb32 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, UINT32 transpen);
void drawgfx_transmask(bitmap_ind16 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, UINT32 transmask);
void drawgfx_transmask(bitmap_rgb32 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, UINT32 transmask);
void drawgfx_transtable(bitmap_ind16 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, const UINT8 *pentable, const pen_t *shadowtable);
void drawgfx_transtable(bitmap_rgb32 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, const UINT8 *pentable, const pen_t *shadowtable);
void drawgfx_alpha(bitmap_rgb32 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, UINT32 transpen, UINT8 alpha);
// ----- zoomed graphics drawing -----
// specific drawgfxzoom implementations for each transparency type
void drawgfxzoom_opaque(bitmap_ind16 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, UINT32 scalex, UINT32 scaley);
void drawgfxzoom_opaque(bitmap_rgb32 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, UINT32 scalex, UINT32 scaley);
void drawgfxzoom_transpen(bitmap_ind16 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, UINT32 scalex, UINT32 scaley, UINT32 transpen);
void drawgfxzoom_transpen(bitmap_rgb32 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, UINT32 scalex, UINT32 scaley, UINT32 transpen);
void drawgfxzoom_transpen_raw(bitmap_ind16 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, UINT32 scalex, UINT32 scaley, UINT32 transpen);
void drawgfxzoom_transpen_raw(bitmap_rgb32 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, UINT32 scalex, UINT32 scaley, UINT32 transpen);
void drawgfxzoom_transmask(bitmap_ind16 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, UINT32 scalex, UINT32 scaley, UINT32 transmask);
void drawgfxzoom_transmask(bitmap_rgb32 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, UINT32 scalex, UINT32 scaley, UINT32 transmask);
void drawgfxzoom_transtable(bitmap_ind16 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, UINT32 scalex, UINT32 scaley, const UINT8 *pentable, const pen_t *shadowtable);
void drawgfxzoom_transtable(bitmap_rgb32 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, UINT32 scalex, UINT32 scaley, const UINT8 *pentable, const pen_t *shadowtable);
void drawgfxzoom_alpha(bitmap_rgb32 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, UINT32 scalex, UINT32 scaley, UINT32 transpen, UINT8 alpha);
// ----- priority masked graphics drawing -----
// specific pdrawgfx implementations for each transparency type
void pdrawgfx_opaque(bitmap_ind16 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, bitmap_ind8 &priority, UINT32 pmask);
void pdrawgfx_opaque(bitmap_rgb32 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, bitmap_ind8 &priority, UINT32 pmask);
void pdrawgfx_transpen(bitmap_ind16 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, bitmap_ind8 &priority, UINT32 pmask, UINT32 transpen);
void pdrawgfx_transpen(bitmap_rgb32 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, bitmap_ind8 &priority, UINT32 pmask, UINT32 transpen);
void pdrawgfx_transpen_raw(bitmap_ind16 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, bitmap_ind8 &priority, UINT32 pmask, UINT32 transpen);
void pdrawgfx_transpen_raw(bitmap_rgb32 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, bitmap_ind8 &priority, UINT32 pmask, UINT32 transpen);
void pdrawgfx_transmask(bitmap_ind16 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, bitmap_ind8 &priority, UINT32 pmask, UINT32 transmask);
void pdrawgfx_transmask(bitmap_rgb32 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, bitmap_ind8 &priority, UINT32 pmask, UINT32 transmask);
void pdrawgfx_transtable(bitmap_ind16 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, bitmap_ind8 &priority, UINT32 pmask, const UINT8 *pentable, const pen_t *shadowtable);
void pdrawgfx_transtable(bitmap_rgb32 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, bitmap_ind8 &priority, UINT32 pmask, const UINT8 *pentable, const pen_t *shadowtable);
void pdrawgfx_alpha(bitmap_rgb32 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, bitmap_ind8 &priority, UINT32 pmask, UINT32 transpen, UINT8 alpha);
// ----- priority masked zoomed graphics drawing -----
// specific pdrawgfxzoom implementations for each transparency type
void pdrawgfxzoom_opaque(bitmap_ind16 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, UINT32 scalex, UINT32 scaley, bitmap_ind8 &priority, UINT32 pmask);
void pdrawgfxzoom_opaque(bitmap_rgb32 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, UINT32 scalex, UINT32 scaley, bitmap_ind8 &priority, UINT32 pmask);
void pdrawgfxzoom_transpen(bitmap_ind16 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, UINT32 scalex, UINT32 scaley, bitmap_ind8 &priority, UINT32 pmask, UINT32 transpen);
void pdrawgfxzoom_transpen(bitmap_rgb32 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, UINT32 scalex, UINT32 scaley, bitmap_ind8 &priority, UINT32 pmask, UINT32 transpen);
void pdrawgfxzoom_transpen_raw(bitmap_ind16 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, UINT32 scalex, UINT32 scaley, bitmap_ind8 &priority, UINT32 pmask, UINT32 transpen);
void pdrawgfxzoom_transpen_raw(bitmap_rgb32 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, UINT32 scalex, UINT32 scaley, bitmap_ind8 &priority, UINT32 pmask, UINT32 transpen);
void pdrawgfxzoom_transmask(bitmap_ind16 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, UINT32 scalex, UINT32 scaley, bitmap_ind8 &priority, UINT32 pmask, UINT32 transmask);
void pdrawgfxzoom_transmask(bitmap_rgb32 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, UINT32 scalex, UINT32 scaley, bitmap_ind8 &priority, UINT32 pmask, UINT32 transmask);
void pdrawgfxzoom_transtable(bitmap_ind16 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, UINT32 scalex, UINT32 scaley, bitmap_ind8 &priority, UINT32 pmask, const UINT8 *pentable, const pen_t *shadowtable);
void pdrawgfxzoom_transtable(bitmap_rgb32 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, UINT32 scalex, UINT32 scaley, bitmap_ind8 &priority, UINT32 pmask, const UINT8 *pentable, const pen_t *shadowtable);
void pdrawgfxzoom_alpha(bitmap_rgb32 &dest, const rectangle &cliprect, gfx_element *gfx, UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty, UINT32 scalex, UINT32 scaley, bitmap_ind8 &priority, UINT32 pmask, UINT32 transpen, UINT8 alpha);
// ----- scanline copying -----
// copy pixels from an 8bpp buffer to a single scanline of a bitmap
void draw_scanline8(bitmap_ind16 &bitmap, INT32 destx, INT32 desty, INT32 length, const UINT8 *srcptr, const pen_t *paldata);
void draw_scanline8(bitmap_rgb32 &bitmap, INT32 destx, INT32 desty, INT32 length, const UINT8 *srcptr, const pen_t *paldata);
// copy pixels from a 16bpp buffer to a single scanline of a bitmap
void draw_scanline16(bitmap_ind16 &bitmap, INT32 destx, INT32 desty, INT32 length, const UINT16 *srcptr, const pen_t *paldata);
void draw_scanline16(bitmap_rgb32 &bitmap, INT32 destx, INT32 desty, INT32 length, const UINT16 *srcptr, const pen_t *paldata);
// copy pixels from a 32bpp buffer to a single scanline of a bitmap
void draw_scanline32(bitmap_ind16 &bitmap, INT32 destx, INT32 desty, INT32 length, const UINT32 *srcptr, const pen_t *paldata);
void draw_scanline32(bitmap_rgb32 &bitmap, INT32 destx, INT32 desty, INT32 length, const UINT32 *srcptr, const pen_t *paldata);
// ----- scanline extraction -----
// copy pixels from a single scanline of a bitmap to an 8bpp buffer
void extract_scanline8(bitmap_ind16 &bitmap, INT32 srcx, INT32 srcy, INT32 length, UINT8 *destptr);
void extract_scanline8(bitmap_rgb32 &bitmap, INT32 srcx, INT32 srcy, INT32 length, UINT8 *destptr);
// copy pixels from a single scanline of a bitmap to a 16bpp buffer
void extract_scanline16(bitmap_ind16 &bitmap, INT32 srcx, INT32 srcy, INT32 length, UINT16 *destptr);
void extract_scanline16(bitmap_rgb32 &bitmap, INT32 srcx, INT32 srcy, INT32 length, UINT16 *destptr);
// copy pixels from a single scanline of a bitmap to a 32bpp buffer
void extract_scanline32(bitmap_ind16 &bitmap, INT32 srcx, INT32 srcy, INT32 length, UINT32 *destptr);
void extract_scanline32(bitmap_rgb32 &bitmap, INT32 srcx, INT32 srcy, INT32 length, UINT32 *destptr);
// ----- bitmap copying -----
// copy from one bitmap to another, copying all unclipped pixels
void copybitmap(bitmap_ind16 &dest, bitmap_ind16 &src, int flipx, int flipy, INT32 destx, INT32 desty, const rectangle &cliprect);
void copybitmap(bitmap_rgb32 &dest, bitmap_rgb32 &src, int flipx, int flipy, INT32 destx, INT32 desty, const rectangle &cliprect);
// copy from one bitmap to another, copying all unclipped pixels except those that match transpen
void copybitmap_trans(bitmap_ind16 &dest, bitmap_ind16 &src, int flipx, int flipy, INT32 destx, INT32 desty, const rectangle &cliprect, UINT32 transpen);
void copybitmap_trans(bitmap_rgb32 &dest, bitmap_rgb32 &src, int flipx, int flipy, INT32 destx, INT32 desty, const rectangle &cliprect, UINT32 transpen);
/*
Copy a bitmap onto another with scroll and wraparound.
These functions support multiple independently scrolling rows/columns.
"rows" is the number of indepentently scrolling rows. "rowscroll" is an
array of integers telling how much to scroll each row. Same thing for
"numcols" and "colscroll".
If the bitmap cannot scroll in one direction, set numrows or columns to 0.
If the bitmap scrolls as a whole, set numrows and/or numcols to 1.
Bidirectional scrolling is, of course, supported only if the bitmap
scrolls as a whole in at least one direction.
*/
// copy from one bitmap to another, copying all unclipped pixels, and applying scrolling to one or more rows/columns
void copyscrollbitmap(bitmap_ind16 &dest, bitmap_ind16 &src, UINT32 numrows, const INT32 *rowscroll, UINT32 numcols, const INT32 *colscroll, const rectangle &cliprect);
void copyscrollbitmap(bitmap_rgb32 &dest, bitmap_rgb32 &src, UINT32 numrows, const INT32 *rowscroll, UINT32 numcols, const INT32 *colscroll, const rectangle &cliprect);
// copy from one bitmap to another, copying all unclipped pixels except those that match transpen, and applying scrolling to one or more rows/columns
void copyscrollbitmap_trans(bitmap_ind16 &dest, bitmap_ind16 &src, UINT32 numrows, const INT32 *rowscroll, UINT32 numcols, const INT32 *colscroll, const rectangle &cliprect, UINT32 transpen);
void copyscrollbitmap_trans(bitmap_rgb32 &dest, bitmap_rgb32 &src, UINT32 numrows, const INT32 *rowscroll, UINT32 numcols, const INT32 *colscroll, const rectangle &cliprect, UINT32 transpen);
/*
Copy a bitmap applying rotation, zooming, and arbitrary distortion.
This function works in a way that mimics some real hardware like the Konami
051316, so it requires little or no further processing on the caller side.
Two 16.16 fixed point counters are used to keep track of the position on
the source bitmap. startx and starty are the initial values of those counters,
indicating the source pixel that will be drawn at coordinates (0,0) in the
destination bitmap. The destination bitmap is scanned left to right, top to
bottom; every time the cursor moves one pixel to the right, incxx is added
to startx and incxy is added to starty. Every time the cursor moves to the
next line, incyx is added to startx and incyy is added to startyy.
What this means is that if incxy and incyx are both 0, the bitmap will be
copied with only zoom and no rotation. If e.g. incxx and incyy are both 0x8000,
the source bitmap will be doubled.
Rotation is performed this way:
incxx = 0x10000 * cos(theta)
incxy = 0x10000 * -sin(theta)
incyx = 0x10000 * sin(theta)
incyy = 0x10000 * cos(theta)
this will perform a rotation around (0,0), you'll have to adjust startx and
starty to move the center of rotation elsewhere.
Optionally the bitmap can be tiled across the screen instead of doing a single
copy. This is obtained by setting the wraparound parameter to true.
*/
// copy from one bitmap to another, with zoom and rotation, copying all unclipped pixels
void copyrozbitmap(bitmap_ind16 &dest, const rectangle &cliprect, bitmap_ind16 &src, INT32 startx, INT32 starty, INT32 incxx, INT32 incxy, INT32 incyx, INT32 incyy, int wraparound);
void copyrozbitmap(bitmap_rgb32 &dest, const rectangle &cliprect, bitmap_rgb32 &src, INT32 startx, INT32 starty, INT32 incxx, INT32 incxy, INT32 incyx, INT32 incyy, int wraparound);
// copy from one bitmap to another, with zoom and rotation, copying all unclipped pixels whose values do not match transpen
void copyrozbitmap_trans(bitmap_ind16 &dest, const rectangle &cliprect, bitmap_ind16 &src, INT32 startx, INT32 starty, INT32 incxx, INT32 incxy, INT32 incyx, INT32 incyy, int wraparound, UINT32 transparent_color);
void copyrozbitmap_trans(bitmap_rgb32 &dest, const rectangle &cliprect, bitmap_rgb32 &src, INT32 startx, INT32 starty, INT32 incxx, INT32 incxy, INT32 incyx, INT32 incyy, int wraparound, UINT32 transparent_color);
/***************************************************************************
INLINE FUNCTIONS
***************************************************************************/
//-------------------------------------------------
// alpha_blend_r16 - alpha blend two 16-bit
// 5-5-5 RGB pixels
//-------------------------------------------------
inline UINT32 alpha_blend_r16(UINT32 d, UINT32 s, UINT8 level)
{
int alphad = 256 - level;
return ((((s & 0x001f) * level + (d & 0x001f) * alphad) >> 8)) |
((((s & 0x03e0) * level + (d & 0x03e0) * alphad) >> 8) & 0x03e0) |
((((s & 0x7c00) * level + (d & 0x7c00) * alphad) >> 8) & 0x7c00);
}
//-------------------------------------------------
// alpha_blend_r16 - alpha blend two 32-bit
// 8-8-8 RGB pixels
//-------------------------------------------------
inline UINT32 alpha_blend_r32(UINT32 d, UINT32 s, UINT8 level)
{
int alphad = 256 - level;
return ((((s & 0x0000ff) * level + (d & 0x0000ff) * alphad) >> 8)) |
((((s & 0x00ff00) * level + (d & 0x00ff00) * alphad) >> 8) & 0x00ff00) |
((((s & 0xff0000) * level + (d & 0xff0000) * alphad) >> 8) & 0xff0000);
}
#endif // __DRAWGFX_H__
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