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author | Vito Caputo <vcaputo@gnugeneration.com> | 2017-01-18 19:12:41 -0800 |
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committer | GitHub <noreply@github.com> | 2017-01-18 19:12:41 -0800 |
commit | 467137113c8b3d6bcb73ecff8c76f23793f25cb7 (patch) | |
tree | ecf3064d6587ec875d5c021d46d44855dc814212 /src/modules/sparkler/draw.h | |
parent | ee2073d4e411555aba878277131b56f7eb562c84 (diff) | |
parent | 404a356b2b22a134aea151145d1baabf253ee491 (diff) |
Merge build system cleanups
- Move source to src/ subdir
- Use $(top_srcdir)/src instead of ../../
Diffstat (limited to 'src/modules/sparkler/draw.h')
-rw-r--r-- | src/modules/sparkler/draw.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/src/modules/sparkler/draw.h b/src/modules/sparkler/draw.h new file mode 100644 index 0000000..5010374 --- /dev/null +++ b/src/modules/sparkler/draw.h @@ -0,0 +1,32 @@ +#ifndef _DRAW_H +#define _DRAW_H + +#include <stdint.h> + +#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 |