diff options
Diffstat (limited to 'src/modules')
| -rw-r--r-- | src/modules/roto/roto.c | 84 |
1 files changed, 6 insertions, 78 deletions
diff --git a/src/modules/roto/roto.c b/src/modules/roto/roto.c index e21b971..c5c951d 100644 --- a/src/modules/roto/roto.c +++ b/src/modules/roto/roto.c @@ -198,8 +198,8 @@ static void roto_prepare_frame(void *context, unsigned n_cpus, fb_fragment_t *fr } -/* Draw a rotating checkered 256x256 texture into fragment. (32-bit version) */ -static void roto32_render_fragment(void *context, fb_fragment_t *fragment) +/* Draw a rotating checkered 256x256 texture into fragment. */ +static void roto_render_fragment(void *context, fb_fragment_t *fragment) { roto_context_t *ctxt = context; int y_cos_r, y_sin_r, x_cos_r, x_sin_r, x_cos_r_init, x_sin_r_init, cos_r, sin_r; @@ -248,85 +248,13 @@ static void roto32_render_fragment(void *context, fb_fragment_t *fragment) } -/* Draw a rotating checkered 256x256 texture into fragment. (64-bit version) */ -static void roto64_render_fragment(void *context, fb_fragment_t *fragment) -{ - roto_context_t *ctxt = context; - int y_cos_r, y_sin_r, x_cos_r, x_sin_r, x_cos_r_init, x_sin_r_init, cos_r, sin_r; - int x, y, frame_width = fragment->frame_width, frame_height = fragment->frame_height, width = fragment->width; - uint64_t *buf = (uint64_t *)fragment->buf; - - /* This is all done using fixed-point in the hopes of being faster, and yes assumptions - * are being made WRT the overflow of tx/ty as well, only tested on x86_64. */ - cos_r = FIXED_COS(ctxt->r); - sin_r = FIXED_SIN(ctxt->r); - - /* Vary the colors, this is just a mashup of sinusoidal rgb values. */ - palette[0].r = (FIXED_MULT(FIXED_COS(ctxt->rr), FIXED_NEW(127)) + FIXED_NEW(128)); - palette[0].g = (FIXED_MULT(FIXED_SIN(ctxt->rr / 2), FIXED_NEW(127)) + FIXED_NEW(128)); - palette[0].b = (FIXED_MULT(FIXED_COS(ctxt->rr / 3), FIXED_NEW(127)) + FIXED_NEW(128)); - - palette[1].r = (FIXED_MULT(FIXED_SIN(ctxt->rr / 2), FIXED_NEW(127)) + FIXED_NEW(128)); - palette[1].g = (FIXED_MULT(FIXED_COS(ctxt->rr / 2), FIXED_NEW(127)) + FIXED_NEW(128)); - palette[1].b = (FIXED_MULT(FIXED_SIN(ctxt->rr), FIXED_NEW(127)) + FIXED_NEW(128)); - - /* The dimensions are cut in half and negated to center the rotation. */ - /* The [xy]_{sin,cos}_r variables are accumulators to replace multiplication with addition. */ - x_cos_r_init = FIXED_MULT(-FIXED_NEW(frame_width / 2) + FIXED_NEW(fragment->x), cos_r); - x_sin_r_init = FIXED_MULT(-FIXED_NEW(frame_width / 2) + FIXED_NEW(fragment->x), sin_r); - - y_cos_r = FIXED_MULT(-FIXED_NEW(frame_height / 2) + FIXED_NEW(fragment->y), cos_r); - y_sin_r = FIXED_MULT(-FIXED_NEW(frame_height / 2) + FIXED_NEW(fragment->y), sin_r); - - width /= 2; /* Since we're processing 64-bit words (2 pixels) at a time */ - - for (y = fragment->y; y < fragment->y + fragment->height; y++) { - - x_cos_r = x_cos_r_init; - x_sin_r = x_sin_r_init; - - for (x = fragment->x; x < fragment->x + width; x++, buf++) { - uint64_t p; - - p = bilerp_color(texture, palette, x_sin_r - y_cos_r, y_sin_r + x_cos_r); - - x_cos_r += cos_r; - x_sin_r += sin_r; - - p |= (uint64_t)(bilerp_color(texture, palette, x_sin_r - y_cos_r, y_sin_r + x_cos_r)) << 32; - - *buf = p; - - x_cos_r += cos_r; - x_sin_r += sin_r; - } - - buf = ((void *)buf) + fragment->stride; - y_cos_r += cos_r; - y_sin_r += sin_r; - } -} - - -rototiller_module_t roto32_module = { - .create_context = roto_create_context, - .destroy_context = roto_destroy_context, - .prepare_frame = roto_prepare_frame, - .render_fragment = roto32_render_fragment, - .name = "roto32", - .description = "Anti-aliased tiled texture rotation (32-bit, threaded)", - .author = "Vito Caputo <vcaputo@pengaru.com>", - .license = "GPLv2", -}; - - -rototiller_module_t roto64_module = { +rototiller_module_t roto_module = { .create_context = roto_create_context, .destroy_context = roto_destroy_context, .prepare_frame = roto_prepare_frame, - .render_fragment = roto64_render_fragment, - .name = "roto64", - .description = "Anti-aliased tiled texture rotation (64-bit, threaded)", + .render_fragment = roto_render_fragment, + .name = "roto", + .description = "Anti-aliased tiled texture rotation (threaded)", .author = "Vito Caputo <vcaputo@pengaru.com>", .license = "GPLv2", }; |