static void _mono_draw_hline(rtgui_color_t *c, int x1, int x2, int y)
{
struct rtgui_graphic_driver *drv = rtgui_graphic_get_device();
rt_ubase_t index;
if (*c == white)
for (index = x1; index < x2; index ++)
{
MONO_PIXEL(FRAMEBUFFER, index, y) &= ~(1 << (y % 8));
}
else
for (index = x1; index < x2; index ++)
{
MONO_PIXEL(FRAMEBUFFER, index, y) |= (1 << (y % 8));
}
}
static void _rgb565p_draw_vline(rtgui_color_t *c, int x , int y1, int y2)
{
struct rtgui_graphic_driver *drv;
rt_uint8_t *dst;
rt_uint16_t pixel;
rt_ubase_t index;
drv = rtgui_graphic_get_device();
pixel = rtgui_color_to_565p(*c);
dst = GET_PIXEL(drv, x, y1, rt_uint8_t);
for (index = y1; index < y2; index ++)
{
*(rt_uint16_t *)dst = pixel;
dst += drv->pitch;
}
}
static void _rgb565p_draw_hline(rtgui_color_t *c, int x1, int x2, int y)
{
int index;
rt_uint16_t pixel;
rt_uint16_t *pixel_ptr;
/* get pixel from color */
pixel = rtgui_color_to_565p(*c);
/* get pixel pointer in framebuffer */
pixel_ptr = GET_PIXEL(rtgui_graphic_get_device(), x1, y, rt_uint16_t);
for (index = x1; index < x2; index ++)
{
*pixel_ptr = pixel;
pixel_ptr ++;
}
}
static void rtgui_image_png_blit(struct rtgui_image *image, struct rtgui_dc *dc, struct rtgui_rect *rect)
{
rt_uint16_t x, y, w, h;
rtgui_color_t *ptr;
struct rtgui_image_png *png;
int fg_maxsample;
int ialpha;
float alpha;
rtgui_color_t color;
rtgui_color_t c, bgcolor;
int fc[3], bc[3];
struct rtgui_graphic_driver *hwdev = rtgui_graphic_get_device();
RT_ASSERT(image != RT_NULL && dc != RT_NULL && rect != RT_NULL);
RT_ASSERT(image->data != RT_NULL);
png = (struct rtgui_image_png *) image->data;
w = _UI_MIN(image->w, rtgui_rect_width(*rect));
h = _UI_MIN(image->h, rtgui_rect_height(*rect));
fg_maxsample = (1 << png->info_ptr->bit_depth) - 1;
if (png->pixels != RT_NULL)
{
ptr = (rtgui_color_t *)png->pixels;
bgcolor = RTGUI_DC_BC(dc);
bc[0] = RTGUI_RGB_R(bgcolor);
bc[1] = RTGUI_RGB_G(bgcolor);
bc[2] = RTGUI_RGB_B(bgcolor);
/* draw each point within dc */
for (y = 0; y < h; y ++)
{
for (x = 0; x < w; x++)
{
c = *ptr;
ialpha = RTGUI_RGB_A(c);
if (ialpha == 0)
{
/*
* Foreground image is transparent hear.
* If the background image is already in the frame
* buffer, there is nothing to do.
*/
}
else if (ialpha == fg_maxsample)
{
/*
* Copy foreground pixel to frame buffer.
*/
rtgui_dc_draw_color_point(dc, x + rect->x1, y + rect->y1, c);
}
else
{
/* output = alpha * foreground + (1-alpha) * background */
/*
* Compositing is necessary.
* Get floating-point alpha and its complement.
* Note: alpha is always linear: gamma does not
* affect it.
*/
fc[0] = RTGUI_RGB_R(c);
fc[1] = RTGUI_RGB_G(c);
fc[2] = RTGUI_RGB_B(c);
alpha = (float) ialpha / fg_maxsample;
color = RTGUI_RGB((rt_uint8_t)(fc[0] * alpha + bc[0] * (1 - alpha)),
(rt_uint8_t)(fc[1] * alpha + bc[1] * (1 - alpha)),
(rt_uint8_t)(fc[2] * alpha + bc[2] * (1 - alpha)));
rtgui_dc_draw_color_point(dc, x + rect->x1, y + rect->y1, color);
}
/* move to next color buffer */
ptr ++;
}
}
}
else
{
png_bytep row;
png_bytep data;
row = (png_bytep) rtgui_malloc(png_get_rowbytes(png->png_ptr, png->info_ptr));
if (row == RT_NULL) return ;
switch (png->info_ptr->color_type)
{
case PNG_COLOR_TYPE_RGB:
for (y = 0; y < h; y++)
{
png_read_row(png->png_ptr, row, png_bytep_NULL);
for (x = 0; x < w; x++)
{
data = &(row[x * 3]);
rtgui_dc_draw_color_point(dc, x + rect->x1, y + rect->y1,
RTGUI_RGB(data[0], data[1], data[2]));
}
}
break;
case PNG_COLOR_TYPE_RGBA:
for (y = 0; y < h; y++)
{
png_read_row(png->png_ptr, row, png_bytep_NULL);
for (x = 0; x < w; x++)
{
data = &(row[x * 4]);
if (data[3] != 0)
{
rtgui_dc_draw_color_point(dc, x + rect->x1, y + rect->y1,
RTGUI_ARGB(data[3], data[0], data[1], data[2]));
}
}
}
break;
case PNG_COLOR_TYPE_PALETTE:
for (y = 0; y < h; y++)
{
png_read_row(png->png_ptr, row, png_bytep_NULL);
for (x = 0; x < w; x++)
{
data = &(row[x]);
rtgui_dc_draw_color_point(dc, x + rect->x1, y + rect->y1,
RTGUI_ARGB(0, png->info_ptr->palette[data[0]].red,
png->info_ptr->palette[data[0]].green,
png->info_ptr->palette[data[0]].blue));
}
}
default:
break;
};
rtgui_free(row);
}
}
static void _argb888_get_pixel(rtgui_color_t *c, int x, int y)
{
*c = (rtgui_color_t)*GET_PIXEL(rtgui_graphic_get_device(), x, y, rtgui_color_t);
}
static void _rgb565p_set_pixel(rtgui_color_t *c, int x, int y)
{
*GET_PIXEL(rtgui_graphic_get_device(), x, y, rt_uint16_t) = rtgui_color_to_565p(*c);
}
static void _rgb888_set_pixel(rtgui_color_t *c, int x, int y)
{
*GET_PIXEL(rtgui_graphic_get_device(), x, y, rt_uint32_t) = rtgui_color_to_888(*c);
}
