static void rtgui_dc_buffer_draw_hline(struct rtgui_dc *self, int x1, int x2, int y1)
{
struct rtgui_dc_buffer *dst;
unsigned r, g, b, a;
dst = (struct rtgui_dc_buffer *)self;
if (y1 >= dst->height) return;
if (x1 > dst->width) x1 = dst->width;
if (x2 > dst->width) x2 = dst->width;
r = RTGUI_RGB_R(dst->gc.foreground);
g = RTGUI_RGB_G(dst->gc.foreground);
b = RTGUI_RGB_B(dst->gc.foreground);
a = RTGUI_RGB_A(dst->gc.foreground);
switch (dst->pixel_format)
{
case RTGRAPHIC_PIXEL_FORMAT_RGB565:
HLINE(rt_uint16_t, DRAW_SETPIXEL_RGB565, 0);
break;
case RTGRAPHIC_PIXEL_FORMAT_BGR565:
HLINE(rt_uint16_t, DRAW_SETPIXEL_BGR565, 0);
break;
case RTGRAPHIC_PIXEL_FORMAT_RGB888:
HLINE(rt_uint16_t, DRAW_SETPIXEL_RGB888, 0);
break;
case RTGRAPHIC_PIXEL_FORMAT_ARGB888:
HLINE(rt_uint32_t, DRAW_SETPIXEL_ARGB8888, 0);
break;
}
}
static void rtgui_dc_buffer_draw_color_point(struct rtgui_dc *self, int x, int y, rtgui_color_t color)
{
struct rtgui_dc_buffer *dst;
unsigned r, g, b, a;
dst = (struct rtgui_dc_buffer *)self;
/* does not draw point out of dc */
if ((x > dst->width) || (y > dst->height)) return ;
r = RTGUI_RGB_R(color);
g = RTGUI_RGB_G(color);
b = RTGUI_RGB_B(color);
a = RTGUI_RGB_A(color);
switch (dst->pixel_format)
{
case RTGRAPHIC_PIXEL_FORMAT_RGB565:
DRAW_SETPIXELXY_RGB565(x, y);
break;
case RTGRAPHIC_PIXEL_FORMAT_BGR565:
DRAW_SETPIXELXY_BGR565(x, y);
break;
case RTGRAPHIC_PIXEL_FORMAT_RGB888:
DRAW_SETPIXELXY_RGB888(x, y);
break;
case RTGRAPHIC_PIXEL_FORMAT_ARGB888:
DRAW_SETPIXELXY_ARGB8888(x, y);
break;
}
}
static void rtgui_dc_buffer_fill_rect(struct rtgui_dc *self, struct rtgui_rect *dst_rect)
{
struct rtgui_dc_buffer *dst;
unsigned r, g, b, a;
rtgui_rect_t _r, *rect;
RT_ASSERT(self);
if (dst_rect == RT_NULL) rtgui_dc_get_rect(self, &_r);
else _r = *dst_rect;
dst = (struct rtgui_dc_buffer *)self;
if (_r.x2 < 0 || _r.y2 < 0) return; /* out of rect */
/* parameter checking */
if (_r.x1 >= dst->width)
return;
else if (_r.x1 < 0)
_r.x1 = 0;
if (_r.x2 > dst->width)
_r.x2 = dst->width;
if (_r.y1 >= dst->height)
return;
else if (_r.y1 < 0)
_r.y1 = 0;
if (_r.y2 > dst->height)
_r.y2 = dst->height;
rect = &_r;
r = RTGUI_RGB_R(dst->gc.background);
g = RTGUI_RGB_G(dst->gc.background);
b = RTGUI_RGB_B(dst->gc.background);
a = RTGUI_RGB_A(dst->gc.background);
switch (dst->pixel_format)
{
case RTGRAPHIC_PIXEL_FORMAT_RGB565:
FILLRECT(rt_uint16_t, DRAW_SETPIXEL_RGB565);
break;
case RTGRAPHIC_PIXEL_FORMAT_BGR565:
FILLRECT(rt_uint16_t, DRAW_SETPIXEL_BGR565);
break;
case RTGRAPHIC_PIXEL_FORMAT_RGB888:
FILLRECT(rt_uint32_t, DRAW_SETPIXEL_RGB888);
break;
case RTGRAPHIC_PIXEL_FORMAT_ARGB888:
FILLRECT(rt_uint32_t, DRAW_SETPIXEL_ARGB8888);
break;
}
}
static void rtgui_dc_buffer_fill_rect(struct rtgui_dc *self, struct rtgui_rect *dst_rect)
{
struct rtgui_dc_buffer *dst;
unsigned r, g, b, a;
rtgui_rect_t _r, *rect;
dst = (struct rtgui_dc_buffer *)self;
_r = *dst_rect;
/* parameter checking */
if (_r.x1 > dst->width) _r.x1 = dst->width;
if (_r.x2 > dst->width) _r.x2 = dst->width;
if (_r.y1 > dst->height) _r.y1 = dst->height;
if (_r.y2 > dst->height) _r.y2 = dst->height;
rect = &_r;
r = RTGUI_RGB_R(dst->gc.foreground);
g = RTGUI_RGB_G(dst->gc.foreground);
b = RTGUI_RGB_B(dst->gc.foreground);
a = RTGUI_RGB_A(dst->gc.foreground);
switch (dst->pixel_format)
{
case RTGRAPHIC_PIXEL_FORMAT_RGB565:
FILLRECT(rt_uint16_t, DRAW_SETPIXEL_RGB565);
break;
case RTGRAPHIC_PIXEL_FORMAT_BGR565:
FILLRECT(rt_uint16_t, DRAW_SETPIXEL_BGR565);
break;
case RTGRAPHIC_PIXEL_FORMAT_RGB888:
FILLRECT(rt_uint16_t, DRAW_SETPIXEL_RGB888);
break;
case RTGRAPHIC_PIXEL_FORMAT_ARGB888:
FILLRECT(rt_uint16_t, DRAW_SETPIXEL_ARGB8888);
break;
}
}
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);
}
}