diff options
| -rw-r--r-- | src/modules/drizzle/drizzle.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/src/modules/drizzle/drizzle.c b/src/modules/drizzle/drizzle.c index fff59bd..57b2664 100644 --- a/src/modules/drizzle/drizzle.c +++ b/src/modules/drizzle/drizzle.c @@ -43,6 +43,7 @@ typedef struct drizzle_setup_t { typedef struct drizzle_context_t { til_module_context_t til_module_context; + til_fb_fragment_t *snapshot; puddle_t *puddle; drizzle_setup_t setup; } drizzle_context_t; @@ -127,6 +128,31 @@ static void drizzle_prepare_frame(til_module_context_t *context, unsigned ticks, } puddle_tick(ctxt->puddle, ctxt->setup.viscosity); + + if ((*fragment_ptr)->cleared) + ctxt->snapshot = til_fb_fragment_snapshot(fragment_ptr, 0); +} + + +/* TODO: this probably should also go through a gamma correction */ +static inline uint32_t pixel_mult_scalar(uint32_t pixel, float t) +{ + float r, g, b; + + if (t > 1.f) + t = 1.f; + if (t < 0.f) + t = 0.f; + + r = (pixel >> 16) & 0xff; + g = (pixel >> 8) & 0xff; + b = (pixel & 0xff); + + r *= t; + g *= t; + b *= t; + + return ((uint32_t)r) << 16 | ((uint32_t)g) << 8 | ((uint32_t)b); } @@ -139,6 +165,26 @@ static void drizzle_render_fragment(til_module_context_t *context, unsigned tick float yf = 1.f / (float)fragment->frame_height; v2f_t coord; + if (ctxt->snapshot) { + coord.y = yf * (float)fragment->y; + for (int y = fragment->y; y < fragment->y + fragment->height; y++) { + + coord.x = xf * (float)fragment->x; + for (int x = fragment->x; x < fragment->x + fragment->width; x++) { + float t = puddle_sample(ctxt->puddle, &coord); + uint32_t pixel = pixel_mult_scalar(til_fb_fragment_get_pixel_unchecked(ctxt->snapshot, x, y), t); + + til_fb_fragment_put_pixel_unchecked(fragment, 0, x, y, pixel); + + coord.x += xf; + } + + coord.y += yf; + } + + return; + } + coord.y = yf * (float)fragment->y; for (int y = fragment->y; y < fragment->y + fragment->height; y++) { @@ -160,6 +206,15 @@ static void drizzle_render_fragment(til_module_context_t *context, unsigned tick } +static void drizzle_finish_frame(til_module_context_t *context, unsigned int ticks, til_fb_fragment_t **fragment_ptr) +{ + drizzle_context_t *ctxt = (drizzle_context_t *)context; + + if (ctxt->snapshot) + ctxt->snapshot = til_fb_fragment_reclaim(ctxt->snapshot); +} + + static int drizzle_setup(const til_settings_t *settings, til_setting_t **res_setting, const til_setting_desc_t **res_desc, til_setup_t **res_setup) { const char *viscosity; @@ -208,8 +263,10 @@ til_module_t drizzle_module = { .destroy_context = drizzle_destroy_context, .prepare_frame = drizzle_prepare_frame, .render_fragment = drizzle_render_fragment, + .finish_frame = drizzle_finish_frame, .name = "drizzle", .description = "Classic 2D rain effect (threaded (poorly))", .author = "Vito Caputo <vcaputo@pengaru.com>", .setup = drizzle_setup, + .flags = TIL_MODULE_OVERLAYABLE, }; |