at91sam9263 ATMEL Corporation, at91sam9263 Datasheet - Page 934

• Manufacturer Part Number: at91sam9263
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

44.4.3
44.4.4
934
AT91SAM9263 Preliminary
Clipped Line Draw
Polygon Fill
This function draws a thick (2 pixels wide) patterned (pixel ON,OFF, ON, OFF…) black line from
start point (startx, starty) to end point (endx, endy). Only the pixels that fall on or within the clip
rectangle boundary are drawn. startx, starty, endx, endy should be in pixel units.
This function fills a polygon with patterned black color. The number of vertices can be a maxi-
mum of 16. x_vertices and y_vertices should be in pixel units.
Void clipped_line_draw(signed long int startx, signed long int starty,
{
while(graphics_control.2DGC_GSR & 3);
graphics_control.2DGC_SBXR = startx;
graphics_control.2DGC_SBYR = starty;
graphics_control.2DGC_TEXR = endx;
graphics_control.2DGC_TEYR = endy;
graphics_control.2DGC_LOR = 0x00; // Select logic operation MOV
graphics_control.2DGC_CSR = 0x00; // Colour black
graphics_control.2DGC_LWR = 0x02; // 2 pixels wide
graphics_control.2DGC_LPR = 0x5555; // Patterned line ON, OFF, ON, OFF …
// set clip rectangle boundary (4,2), (8,2), (4,4), (8,4)
graphics_control.2DGC_CXMINR = 4;
graphics_control.2DGC_CXMAXR = 8;
graphics_control.2DGC_CYMINR = 2;
graphics_control.2DGC_CYMAXR = 4;
graphics_control.2DGC_CCR = 1; // Enable clipping
graphics_control.2DGC_GOR = 0xD5; // Line draw, absolute, no update, 1D
pattern
while(graphics_control.2DGC_GSR & 1);
}
Void polygon_fill(unsigned short *x_vertices, unsigned short *y_vertices,
{
int i;
while(graphics_control.2DGC_GSR & 3);
for(i = 0; i < vertex_count; i++)
{
}
graphics_control.2DGC_VXR[i] = x_vertices;
graphics_control.2DGC_VYR[i] = y_vertices;
x_vertices++;
y_vertices++;
unsigned short pattern, unsigned char vertex_count)
signed long int endx, signed long int endy)
6249D–ATARM–20-Dec-07