diff options
author | Vito Caputo <vcaputo@gnugeneration.com> | 2017-02-03 15:43:51 -0800 |
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committer | Vito Caputo <vcaputo@gnugeneration.com> | 2017-02-03 15:43:51 -0800 |
commit | 90fde2df2d8c59b0b885e6e02b5e89dbe966a5e9 (patch) | |
tree | f1e5d26650fd34bb47b2d8040d7711996c77f97c /src/modules/sparkler/helpers.h | |
parent | 1a330772b827364471dbe02b417c14fb42838c2d (diff) |
sparkler: use fb.h put_pixel helpers
discards draw_pixel(), introduces helpers.h and a convenience
function for bounds checking and oob extermination. Move makergb
to helpers.h, draw.h gets removed in a later commit.
Diffstat (limited to 'src/modules/sparkler/helpers.h')
-rw-r--r-- | src/modules/sparkler/helpers.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/modules/sparkler/helpers.h b/src/modules/sparkler/helpers.h new file mode 100644 index 0000000..e263d36 --- /dev/null +++ b/src/modules/sparkler/helpers.h @@ -0,0 +1,36 @@ +#ifndef _HELPERS_H +#define _HELPERS_H + +#include <stdint.h> + +#include "fb.h" +#include "particle.h" +#include "particles.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)); +} + + +/* return if the particle should be drawn, and set *longevity to 0 if out of bounds */ +static inline int should_draw_expire_if_oob(particles_t *particles, particle_t *p, int x, int y, fb_fragment_t *f, int *longevity) +{ + if (!fb_fragment_contains(f, x, y)) { + /* offscreen */ + if (longevity) + *longevity = 0; + + return 0; + } + + return 1; +} + +#endif |