32 lines
1.5 KiB
C
32 lines
1.5 KiB
C
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#include <framebuffer.h>
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int fb_write_pixel_8bit(struct fb *f, unsigned int x, unsigned int y, unsigned int r, unsigned int g, unsigned int b) {
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unsigned char pixel = (((r >> 6) << 4) & 0x30) | (((b >> 6) << 2) & 0xC) | ((g >> 6) & 0x3);
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((char*) (f->device->fbaddr))[y*f->device->pixelwidth + x] = pixel;
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return 0;
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}
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int fb_write_pixel_16bit(struct fb *f, unsigned int x, unsigned int y, unsigned int r, unsigned int g, unsigned int b) {
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unsigned int pixel = (((r >> 3) << 10) & 0x7BF6) | (((b >> 3) << 5) & 0x3E0) | ((g >> 3) & 0x1F);
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((char*)f->device->fbaddr)[(y*f->device->pixelwidth + x) << 1] = (char)pixel;
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((char*)f->device->fbaddr)[((y*f->device->pixelwidth + x) << 1) + 1] = (char)(pixel >> 8);
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return 0;
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}
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int fb_write_pixel_24bit(struct fb *f, unsigned int x, unsigned int y, unsigned int r, unsigned int g, unsigned int b) {
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((char*)f->device->fbaddr)[(y*f->device->pixelwidth + x)*3] = (char)r;
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((char*)f->device->fbaddr)[(y*f->device->pixelwidth + x)*3 + 1] = (char)b;
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((char*)f->device->fbaddr)[(y*f->device->pixelwidth + x)*3 + 2] = (char)g;
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return 0;
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}
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int fb_write_pixel(struct fb *f, unsigned int x, unsigned int y, unsigned int r, unsigned int g, unsigned int b) {
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if (f->device->color_depth == FB_COLOR_DEPTH_8)
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return fb_write_pixel_8bit(f, x, y, r, g, b);
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else if (f->device->color_depth == FB_COLOR_DEPTH_16)
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return fb_write_pixel_16bit(f, x, y, r, g, b);
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else if (f->device->color_depth == FB_COLOR_DEPTH_24)
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return fb_write_pixel_24bit(f, x, y, r, g, b);
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return -1;
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}
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