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/***************************************************************************
bitmap.h
Core bitmap routines.
****************************************************************************
Copyright Aaron Giles
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
* Neither the name 'MAME' nor the names of its contributors may be
used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY AARON GILES ''AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL AARON GILES BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
***************************************************************************/
#pragma once
#ifndef __BITMAP_H__
#define __BITMAP_H__
#include "osdcore.h"
#include "palette.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// bitmap_format describes the various bitmap formats we use
enum bitmap_format
{
BITMAP_FORMAT_INVALID = 0, // invalid forma
BITMAP_FORMAT_INDEXED8, // 8bpp indexed
BITMAP_FORMAT_INDEXED16, // 16bpp indexed
BITMAP_FORMAT_INDEXED32, // 32bpp indexed
BITMAP_FORMAT_INDEXED64, // 64bpp indexed
BITMAP_FORMAT_RGB15, // 15bpp 5-5-5 RGB
BITMAP_FORMAT_RGB32, // 32bpp 8-8-8 RGB
BITMAP_FORMAT_ARGB32, // 32bpp 8-8-8-8 ARGB
BITMAP_FORMAT_YUY16, // 16bpp 8-8 Y/Cb, Y/Cr in sequence
BITMAP_FORMAT_LAST
};
// rectangles describe a bitmap portion
class rectangle
{
public:
// construction/destruction
rectangle() { }
rectangle(INT32 minx, INT32 maxx, INT32 miny, INT32 maxy)
: min_x(minx), max_x(maxx), min_y(miny), max_y(maxy) { }
// compute intersection with another rect
rectangle &operator&=(const rectangle &src)
{
if (src.min_x > min_x) min_x = src.min_x;
if (src.max_x < max_x) max_x = src.max_x;
if (src.min_y > min_y) min_y = src.min_y;
if (src.max_y < max_y) max_y = src.max_y;
return *this;
}
// compute union with another rect
rectangle &operator|=(const rectangle &src)
{
if (src.min_x < min_x) min_x = src.min_x;
if (src.max_x > max_x) max_x = src.max_x;
if (src.min_y < min_y) min_y = src.min_y;
if (src.max_y > max_y) max_y = src.max_y;
return *this;
}
// other helpers
bool empty() const { return (min_x > max_x || min_y > max_y); }
bool contains(INT32 x, INT32 y) const { return (x >= min_x && x <= max_x && y >= min_y && y <= max_y); }
INT32 width() const { return max_x + 1 - min_x; }
INT32 height() const { return max_y + 1 - min_y; }
// setters
void set(INT32 minx, INT32 maxx, INT32 miny, INT32 maxy) { min_x = minx; max_x = maxx; min_y = miny; max_y = maxy; }
void set_width(INT32 width) { max_x = min_x + width - 1; }
void set_height(INT32 height) { max_y = min_y + height - 1; }
void set_origin(INT32 x, INT32 y) { max_x += x - min_x; max_y += y - min_y; min_x = x; min_y = y; }
// internal state
INT32 min_x; // minimum X, or left coordinate
INT32 max_x; // maximum X, or right coordinate (inclusive)
INT32 min_y; // minimum Y, or top coordinate
INT32 max_y; // maximum Y, or bottom coordinate (inclusive)
};
// bitmaps describe a rectangular array of pixels
class bitmap_t
{
private:
// prevent implicit copying
bitmap_t(const bitmap_t &);
bitmap_t &operator=(const bitmap_t &);
public:
// construction/destruction
bitmap_t();
bitmap_t(int width, int height, bitmap_format format, int xslop = 0, int yslop = 0);
bitmap_t(void *base, int width, int height, int rowpixels, bitmap_format format);
~bitmap_t();
// getters
INT32 width() const { return m_width; }
INT32 height() const { return m_height; }
INT32 rowpixels() const { return m_rowpixels; }
INT32 rowbytes() const { return m_rowpixels * m_bpp / 8; }
UINT8 bpp() const { return m_bpp; }
bitmap_format format() const { return m_format; }
palette_t *palette() const { return m_palette; }
const rectangle &cliprect() const { return m_cliprect; }
// helpers
void clone_existing(const bitmap_t &srcbitmap);
void set_palette(palette_t *palette);
void fill(rgb_t color) { fill(color, m_cliprect); }
void fill(rgb_t color, const rectangle &cliprect);
void plot_box(int x, int y, int width, int height, UINT32 color)
{
rectangle clip(x, x + width - 1, y, y + height - 1);
fill(color, clip);
}
// pixel access
template<typename _PixelType>
_PixelType &pix(INT32 y, INT32 x = 0) const { return *(reinterpret_cast<_PixelType *>(m_base) + y * m_rowpixels + x); }
UINT8 &pix8(INT32 y, INT32 x = 0) const { return *(reinterpret_cast<UINT8 *>(m_base) + y * m_rowpixels + x); }
UINT16 &pix16(INT32 y, INT32 x = 0) const { return *(reinterpret_cast<UINT16 *>(m_base) + y * m_rowpixels + x); }
UINT32 &pix32(INT32 y, INT32 x = 0) const { return *(reinterpret_cast<UINT32 *>(m_base) + y * m_rowpixels + x); }
UINT64 &pix64(INT32 y, INT32 x = 0) const { return *(reinterpret_cast<UINT64 *>(m_base) + y * m_rowpixels + x); }
void *raw_pixptr(INT32 y, INT32 x = 0) const { return reinterpret_cast<UINT8 *>(m_base) + (y * m_rowpixels + x) * m_bpp / 8; }
// static helpers
static UINT8 format_to_bpp(bitmap_format format);
private:
// internal state
UINT8 * m_alloc; // pointer to allocated pixel memory
void * m_base; // pointer to pixel (0,0) (adjusted for padding)
INT32 m_rowpixels; // pixels per row (including padding)
INT32 m_width; // width of the bitmap
INT32 m_height; // height of the bitmap
bitmap_format m_format; // format of the bitmap
UINT8 m_bpp; // bits per pixel
palette_t * m_palette; // optional palette
rectangle m_cliprect; // a clipping rectangle covering the full bitmap
};
#endif // __BITMAP_H__
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