C++ bitmap_rgb32::cliprect方法代码示例

INPUT_PORTS_END

/****************************************************\
* Video hardware                                     *
\****************************************************/

void uzebox_state::line_update()
{
	uint32_t cycles = (uint32_t)(m_maincpu->get_elapsed_cycles() - m_line_start_cycles) / 2;
	rgb_t color = rgb_t(pal3bit(m_port_c >> 0), pal3bit(m_port_c >> 3), pal2bit(m_port_c >> 6));

	for (uint32_t x = m_line_pos_cycles; x < cycles; x++)
	{
		if (m_bitmap.cliprect().contains(x, m_vpos))
			m_bitmap.pix32(m_vpos, x) = color;
		if (!INTERLACED)
			if (m_bitmap.cliprect().contains(x, m_vpos + 1))
				m_bitmap.pix32(m_vpos + 1, x) = color;
	}

	m_line_pos_cycles = cycles;
}

inline void deco_zoomspr_device::dragngun_drawgfxzoom(
		bitmap_rgb32 &dest_bmp,const rectangle &clip,gfx_element *gfx,
		UINT32 code,UINT32 color,int flipx,int flipy,int sx,int sy,
		int transparent_color,
		int scalex, int scaley,bitmap_ind8 *pri_buffer,UINT32 pri_mask, int sprite_screen_width, int  sprite_screen_height, UINT8 alpha,
		bitmap_ind8 &pri_bitmap, bitmap_rgb32 &temp_bitmap,
		int priority)
{
	rectangle myclip;

	if (!scalex || !scaley) return;

	/*
	scalex and scaley are 16.16 fixed point numbers
	1<<15 : shrink to 50%
	1<<16 : uniform scale
	1<<17 : double to 200%
	*/

	/* KW 991012 -- Added code to force clip to bitmap boundary */
	myclip = clip;
	myclip &= temp_bitmap.cliprect();

	{
		if( gfx )
		{
			const pen_t *pal = &m_palette->pen(gfx->colorbase() + gfx->granularity() * (color % gfx->colors()));
			const UINT8 *code_base = gfx->get_data(code % gfx->elements());

			if (sprite_screen_width && sprite_screen_height)
			{
				/* compute sprite increment per screen pixel */
				int dx = (gfx->width()<<16)/sprite_screen_width;
				int dy = (gfx->height()<<16)/sprite_screen_height;

				int ex = sx+sprite_screen_width;
				int ey = sy+sprite_screen_height;

				int x_index_base;
				int y_index;

				if( flipx )
				{
					x_index_base = (sprite_screen_width-1)*dx;
					dx = -dx;
				}
				else
				{
					x_index_base = 0;
				}

				if( flipy )
				{
					y_index = (sprite_screen_height-1)*dy;
					dy = -dy;
				}
				else
				{
					y_index = 0;
				}

				if( sx < clip.min_x)
				{ /* clip left */
					int pixels = clip.min_x-sx;
					sx += pixels;
					x_index_base += pixels*dx;
				}
				if( sy < clip.min_y )
				{ /* clip top */
					int pixels = clip.min_y-sy;
					sy += pixels;
					y_index += pixels*dy;
				}
				/* NS 980211 - fixed incorrect clipping */
				if( ex > clip.max_x+1 )
				{ /* clip right */
					int pixels = ex-clip.max_x-1;
					ex -= pixels;
				}
				if( ey > clip.max_y+1 )
				{ /* clip bottom */
					int pixels = ey-clip.max_y-1;
					ey -= pixels;
				}

				if( ex>sx )
				{ /* skip if inner loop doesn't draw anything */
					int y;

					/* case 1: no alpha */
					if (alpha == 0xff)
					{
						{
							for( y=sy; y<ey; y++ )
							{
								const UINT8 *source = code_base + (y_index>>16) * gfx->rowbytes();
								UINT32 *dest = &temp_bitmap.pix32(y);
								UINT8 *pri = &pri_bitmap.pix8(y);


//.........这里部分代码省略.........

void bt459_device::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect, u8 *pixel_data)
{
	// initialise the blink timer
	if (m_blink_start > screen.frame_number())
		m_blink_start = screen.frame_number();

	// compute the blink state according to the programmed duty cycle
	const bool blink_state = ((screen.frame_number() - m_blink_start) & (
		(m_command_0 & CR0302) == CR0302_1616 ? 0x10 :
		(m_command_0 & CR0302) == CR0302_3232 ? 0x20 :
		(m_command_0 & CR0302) == CR0302_6464 ? 0x40 : 0x30)) == 0;

	// compute the pixel mask from the pixel read mask and blink mask/state
	const u8 pixel_mask = m_pixel_read_mask & (blink_state ? 0xffU : ~m_pixel_blink_mask);

	// draw visible pixel data
	switch (m_command_0 & CR0100)
	{
	case CR0100_1BPP:
		for (int y = screen.visible_area().min_y; y <= screen.visible_area().max_y; y++)
			for (int x = screen.visible_area().min_x; x <= screen.visible_area().max_x; x += 8)
			{
				u8 data = *pixel_data++;

				bitmap.pix(y, x + 7) = get_rgb(data & 0x1, pixel_mask); data >>= 1;
				bitmap.pix(y, x + 6) = get_rgb(data & 0x1, pixel_mask); data >>= 1;
				bitmap.pix(y, x + 5) = get_rgb(data & 0x1, pixel_mask); data >>= 1;
				bitmap.pix(y, x + 4) = get_rgb(data & 0x1, pixel_mask); data >>= 1;
				bitmap.pix(y, x + 3) = get_rgb(data & 0x1, pixel_mask); data >>= 1;
				bitmap.pix(y, x + 2) = get_rgb(data & 0x1, pixel_mask); data >>= 1;
				bitmap.pix(y, x + 1) = get_rgb(data & 0x1, pixel_mask); data >>= 1;
				bitmap.pix(y, x + 0) = get_rgb(data & 0x1, pixel_mask);
			}
		break;

	case CR0100_2BPP:
		for (int y = screen.visible_area().min_y; y <= screen.visible_area().max_y; y++)
			for (int x = screen.visible_area().min_x; x <= screen.visible_area().max_x; x += 4)
			{
				u8 data = *pixel_data++;

				bitmap.pix(y, x + 3) = get_rgb(data & 0x3, pixel_mask); data >>= 2;
				bitmap.pix(y, x + 2) = get_rgb(data & 0x3, pixel_mask); data >>= 2;
				bitmap.pix(y, x + 1) = get_rgb(data & 0x3, pixel_mask); data >>= 2;
				bitmap.pix(y, x + 0) = get_rgb(data & 0x3, pixel_mask);
			}
		break;

	case CR0100_4BPP:
		for (int y = screen.visible_area().min_y; y <= screen.visible_area().max_y; y++)
			for (int x = screen.visible_area().min_x; x <= screen.visible_area().max_x; x += 2)
			{
				u8 data = *pixel_data++;

				bitmap.pix(y, x + 1) = get_rgb(data & 0x7, pixel_mask); data >>= 4;
				bitmap.pix(y, x + 0) = get_rgb(data & 0x7, pixel_mask);
			}
		break;

	case CR0100_8BPP:
		for (int y = screen.visible_area().min_y; y <= screen.visible_area().max_y; y++)
			for (int x = screen.visible_area().min_x; x <= screen.visible_area().max_x; x++)
				bitmap.pix(y, x) = get_rgb(*pixel_data++, pixel_mask);
		break;
	}

	// draw cursors when visible and not blinked off
	if ((m_cursor_command & (CR47 | CR46 | CR45 | CR44)) && ((m_cursor_command & CR40) == 0 || blink_state))
	{
		// get 64x64 bitmap and cross hair cursor plane enable
		const u8 bm_cursor_enable = (m_cursor_command & (CR47 | CR46)) >> 6;
		const u8 ch_cursor_enable = (m_cursor_command & (CR45 | CR44)) >> 4;

		// get cross hair cursor half thickness
		const int ch_thickness = (m_cursor_command & CR4241) >> 1;

		/*
		 * The cursor (x) value to be written is calculated as follows:
		 *
		 *   Cx = desired display screen (x) position + H - P
		 *
		 * where
		 *
		 *   P = 37 if 1:1 input multiplexing, 52 if 4:1 input multiplexing,
		 *       57 if 5:1 input multiplexing
		 *   H = number of pixels between the first rising edge of LD*
		 *       following the falling edge of HSYNC* to active video
		 *
		 * The cursor (y) value to be written is calculated as follows:
		 *
		 *   Cy = desired display screen (y) position + V - 32
		 *
		 * where
		 *
		 *   V = number of scan lines from the second sync pulse during
		 *       vertical blanking to active video
		 *
		 * Values from $0FC0 (-64) to $0FBF (+4031) may be loaded into the
		 * cursor (y) register. The negative values ($0FC0 to $0FFF) are used
		 * in situations where V < 32, and the cursor must be moved off the
//.........这里部分代码省略.........