void CL_PixelFillRenderer::fill_rect(const CL_Rect &dest, const CL_Colorf &primary_color)
{
int dest_buffer_width = colorbuffer0.size.width;
int dest_buffer_height = colorbuffer0.size.height;
unsigned int *dest_data = colorbuffer0.data;
int start_x = cl_max(dest.left, clip_rect.left);
int end_x = cl_min(dest.right, clip_rect.right);
int start_y = cl_max(dest.top, clip_rect.top);
int end_y = cl_min(dest.bottom, clip_rect.bottom);
if (start_x < end_x && start_y < end_y)
{
int dest_y = find_first_line_for_core(start_y, core, num_cores);
int delta_x = start_x-dest.left;
int delta_y = dest_y-dest.top;
unsigned int *dest_line = dest_data+dest_y*dest_buffer_width+start_x;
int line_length = end_x-start_x;
int dest_line_incr = dest_buffer_width * num_cores;
unsigned int sred = (unsigned int) (primary_color.r*255);
unsigned int sgreen = (unsigned int) (primary_color.g*255);
unsigned int sblue = (unsigned int) (primary_color.b*255);
unsigned int salpha = (unsigned int) (primary_color.a*255);
if (salpha == 255)
{
unsigned int color = (salpha<<24) + (sred<<16) + (sgreen<<8) + sblue;
while (dest_y < end_y)
{
for (int x = 0; x < line_length; x++)
dest_line[x] = color;
dest_y += num_cores;
dest_line += dest_line_incr;
}
}
else
{
unsigned int pos_salpha = salpha*256/255;
unsigned int neg_salpha = 256-salpha;
while (dest_y < end_y)
{
for (int x = 0; x < line_length; x++)
{
#define alpha_component(a) (((a)&0xff000000)>>24)
#define red_component(a) (((a)&0x00ff0000)>>16)
#define green_component(a) (((a)&0x0000ff00)>>8)
#define blue_component(a) ((a)&0x000000ff)
unsigned int dest_color = dest_line[x];
unsigned int dred = red_component(dest_color);
unsigned int dgreen = green_component(dest_color);
unsigned int dblue = blue_component(dest_color);
unsigned int dalpha = alpha_component(dest_color);
unsigned red = (dred * neg_salpha + sred * pos_salpha) >> 8;
unsigned green = (dgreen * neg_salpha + sgreen * pos_salpha) >> 8;
unsigned blue = (dblue * neg_salpha + sblue * pos_salpha) >> 8;
unsigned alpha = (dalpha * neg_salpha + salpha * pos_salpha) >> 8;
dest_line[x] = (alpha<<24) + (red<<16) + (green<<8) + blue;
}
dest_y += num_cores;
dest_line += dest_line_incr;
}
}
}
void PixelLineRenderer::draw_line(const LineSegment2 &line_dest, const Colorf &primary_color)
{
// Clip the input line
LineSegment2 line(line_dest);
bool clipped;
line.clip(clip_rect, clipped);
if (!clipped) // Off screen
return;
if (line.p.y > line.q.y) // We draw top down
{
Vec2i t(line.p);
line.p = line.q;
line.q = t;
}
#define alpha_component(a) (((a)&0xff000000)>>24)
#define red_component(a) (((a)&0x00ff0000)>>16)
#define green_component(a) (((a)&0x0000ff00)>>8)
#define blue_component(a) ((a)&0x000000ff)
unsigned int sred = (unsigned int) (primary_color.r*255);
unsigned int sgreen = (unsigned int) (primary_color.g*255);
unsigned int sblue = (unsigned int) (primary_color.b*255);
unsigned int salpha = (unsigned int) (primary_color.a*255);
// Special case - horizontal line
if (line.p.y == line.q.y)
{
int dest_y = find_first_line_for_core(line.p.y, core, num_cores);
if (dest_y == line.p.y) // Ensure correct line --- This might not be required
{
// Draw left to right
if (line.p.x > line.q.x)
{
// Swap left and right
int t = line.p.x;
line.p.x = line.q.x;
line.q.x = t;
}
if(dest_y>=dest_height)
{
//abort
return;
}
unsigned int *dest_line = dest+dest_y*dest_width;
if (salpha == 255)
{
unsigned int color = (salpha<<24) + (sred<<16) + (sgreen<<8) + sblue;
for (int x = line.p.x; x < line.q.x; x++)
{
dest_line[x] = color;
}
}
else
{
unsigned int pos_salpha = salpha*256/255;
unsigned int neg_salpha = 256-salpha;
for (int x = line.p.x; x < line.q.x; x++)
{
unsigned int dest_color = dest_line[x];
unsigned int dred = red_component(dest_color);
unsigned int dgreen = green_component(dest_color);
unsigned int dblue = blue_component(dest_color);
unsigned int dalpha = alpha_component(dest_color);
unsigned red = (dred * neg_salpha + sred * pos_salpha) >> 8;
unsigned green = (dgreen * neg_salpha + sgreen * pos_salpha) >> 8;
unsigned blue = (dblue * neg_salpha + sblue * pos_salpha) >> 8;
unsigned alpha = (dalpha * neg_salpha + salpha * pos_salpha) >> 8;
dest_line[x] = (alpha<<24) + (red<<16) + (green<<8) + blue;
}
}
}
}
