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#include "object/framebuffer.h"
#ifdef CONFIG_framebuffer_in_text_segment
__attribute__ ((section(".text")))
#endif
static unsigned char framebuffer[(unsigned long int)CONFIG_framebuffer_width * (unsigned long int)CONFIG_framebuffer_height / 8];
void Framebuffer::clear()
{
for (unsigned int i = 0; i < width * (height / 8); i++) {
data[i] = 0;
}
}
void Framebuffer::fillBox(unsigned int x, unsigned int y, unsigned int w, unsigned int h)
{
if (w == 0 || h == 0) {
return;
}
w -= 1;
h -= 1;
if ((x+w) >= width || (y+h) >= height) {
return;
}
unsigned int x1 = (height/8)*x;
unsigned int x2 = (height/8)*(x+w);
unsigned int y2 = height-1-y;
unsigned int y1 = y2-h;
unsigned char y2_mask = 0xff << (8 - (y2 % 8)); // bits from 0 to y2%8 must be filled
unsigned char y1_mask = 0xff >> (y1 % 8); // bits from y1%8 to 7 must be filled
y1 = y1/8;
y2 = y2/8;
if (y1 == y2) {
// y1_mask and y2_mask overlap
for (unsigned int pos_x = x1; pos_x < x2; pos_x += height/8) {
data[pos_x + y1] |= y1_mask & y2_mask;
}
} else {
if (y1_mask != 0xff) {
for (unsigned int pos_x = x1; pos_x < x2; pos_x += height/8) {
data[pos_x + y1] |= y1_mask;
}
y1++;
}
for (unsigned int pos_x = x1; pos_x < x2; pos_x += height/8) {
for (unsigned int pos_y = y1; pos_y < y2; pos_y++) {
data[pos_x + pos_y] = 0xff;
}
}
if (y2_mask) {
for (unsigned int pos_x = x1; pos_x < x2; pos_x += height/8) {
data[pos_x + y2] |= y2_mask;
}
}
}
}
void Framebuffer::drawAt(unsigned int x, unsigned int y, unsigned int w, unsigned int h, unsigned char *image)
{
y /= 8;
for (unsigned int pos_x = 0; pos_x < w; pos_x++) {
for (unsigned int pos_y = 0; pos_y < h/8; pos_y++) {
data[(x + pos_x) * (height/8) + y + pos_y] = image[pos_x * (h/8) + pos_y];
}
}
}
Framebuffer fb(framebuffer);
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