aclindsa/aedrix-kernel
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framebuffer: fix 16- and 24-bit color. 8-bit still doesn't work.

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This commit is contained in:
Aaron Lindsay 2012-09-08 00:42:23 -04:00
parent 29404c4199
commit 332b86f520
2 changed files with 9 additions and 10 deletions
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12
kernel/framebuffer.c
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@ -1,22 +1,22 @@
#include <framebuffer.h>
int fb_write_pixel_8bit(struct fb *f, unsigned int x, unsigned int y, unsigned int r, unsigned int g, unsigned int b) {
unsigned char pixel = (((r >> 6) << 4) & 0x30) | (((b >> 6) << 2) & 0xC) | ((g >> 6) & 0x3);
((char*) (f->device->fbaddr))[y*f->device->pixelwidth + x] = pixel;
unsigned char pixel = (((b >> 6) << 6) & 0xC0) | (((g >> 5) << 3) & 0x38) | ((r >> 5) & 0x7);
((char*)f->device->fbaddr)[y*f->device->pixelwidth + x] = pixel;
return 0;
}
int fb_write_pixel_16bit(struct fb *f, unsigned int x, unsigned int y, unsigned int r, unsigned int g, unsigned int b) {
unsigned int pixel = (((r >> 3) << 10) & 0x7BF6) | (((b >> 3) << 5) & 0x3E0) | ((g >> 3) & 0x1F);
unsigned int pixel = (((b >> 3) << 11) & 0xF800) | (((g >> 2) << 6) & 0x7E0) | ((r >> 3) & 0x1F);
((char*)f->device->fbaddr)[(y*f->device->pixelwidth + x) << 1] = (char)pixel;
((char*)f->device->fbaddr)[((y*f->device->pixelwidth + x) << 1) + 1] = (char)(pixel >> 8);
return 0;
}
int fb_write_pixel_24bit(struct fb *f, unsigned int x, unsigned int y, unsigned int r, unsigned int g, unsigned int b) {
((char*)f->device->fbaddr)[(y*f->device->pixelwidth + x)*3] = (char)r;
((char*)f->device->fbaddr)[(y*f->device->pixelwidth + x)*3 + 1] = (char)b;
((char*)f->device->fbaddr)[(y*f->device->pixelwidth + x)*3 + 2] = (char)g;
((char*)f->device->fbaddr)[(y*f->device->pixelwidth + x)*4] = (char)r;
((char*)f->device->fbaddr)[(y*f->device->pixelwidth + x)*4 + 1] = (char)g;
((char*)f->device->fbaddr)[(y*f->device->pixelwidth + x)*4 + 2] = (char)b;
return 0;
}

7
kernel/start_kernel.c
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@ -11,10 +11,9 @@ void video(void)
unsigned int x, y;
pl110_init(&myfb, 16);
x = 0, y = 0;
for (x=0; x<640; x++)
for (y=0; y<480; y++)
fb_write_pixel(&myfb, x, y, 0x1f, 0x1f, 0x0);
for (y=0; y<480; y++)
for (x=0; x<640; x++)
fb_write_pixel(&myfb, x, y, 0xff, 0x00, 0x00);
}
int main(void)