本文整理汇总了C++中bitmap_rgb32::pix方法的典型用法代码示例。如果您正苦于以下问题：C++ bitmap_rgb32::pix方法的具体用法？C++ bitmap_rgb32::pix怎么用？C++ bitmap_rgb32::pix使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类bitmap_rgb32的用法示例。
在下文中一共展示了bitmap_rgb32::pix方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: cursor
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.........