From 524db0cf19648e3c7c78d3e73103b7a0bdcd6bfc Mon Sep 17 00:00:00 2001 From: Vito Caputo Date: Wed, 18 Jan 2017 17:14:52 -0800 Subject: *: move source into src/ subdir Restoring some organizational sanity since adopting autotools. --- src/modules/stars/draw.h | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 src/modules/stars/draw.h (limited to 'src/modules/stars/draw.h') diff --git a/src/modules/stars/draw.h b/src/modules/stars/draw.h new file mode 100644 index 0000000..5010374 --- /dev/null +++ b/src/modules/stars/draw.h @@ -0,0 +1,32 @@ +#ifndef _DRAW_H +#define _DRAW_H + +#include + +#include "fb.h" + +/* helper for scaling rgb colors and packing them into an pixel */ +static inline uint32_t makergb(uint32_t r, uint32_t g, uint32_t b, float intensity) +{ + r = (((float)intensity) * r); + g = (((float)intensity) * g); + b = (((float)intensity) * b); + + return (((r & 0xff) << 16) | ((g & 0xff) << 8) | (b & 0xff)); +} + +static inline int draw_pixel(fb_fragment_t *f, int x, int y, uint32_t pixel) +{ + uint32_t *pixels = f->buf; + + if (y < 0 || y >= f->height || x < 0 || x >= f->width) { + return 0; + } + + /* FIXME this assumes stride is aligned to 4 */ + pixels[(y * (f->width + (f->stride >> 2))) + x] = pixel; + + return 1; +} + +#endif -- cgit v1.2.1