diff options
| -rw-r--r-- | src/modules/roto/roto.c | 60 |
1 files changed, 41 insertions, 19 deletions
diff --git a/src/modules/roto/roto.c b/src/modules/roto/roto.c index 9c7ac18..2074414 100644 --- a/src/modules/roto/roto.c +++ b/src/modules/roto/roto.c @@ -1,6 +1,7 @@ #include <stdint.h> #include <inttypes.h> #include <math.h> +#include <stdlib.h> #include "fb.h" #include "rototiller.h" @@ -22,10 +23,24 @@ typedef struct color_t { int r, g, b; } color_t; +typedef struct roto_context_t { + unsigned r, rr; +} roto_context_t; + static int32_t costab[FIXED_TRIG_LUT_SIZE], sintab[FIXED_TRIG_LUT_SIZE]; static uint8_t texture[256][256]; static color_t palette[2]; -static unsigned r, rr; + +static void * roto_create_context(void) +{ + return calloc(1, sizeof(roto_context_t)); +} + + +static void roto_destroy_context(void *context) +{ + free(context); +} /* linearly interpolate between two colors, alpha is fixed-point value 0-FIXED_EXP. */ @@ -156,6 +171,7 @@ static void init_roto(uint8_t texture[256][256], int32_t *costab, int32_t *sinta /* prepare a frame for concurrent rendering */ static void roto_prepare_frame(void *context, unsigned n_cpus, fb_fragment_t *fragment, rototiller_frame_t *res_frame) { + roto_context_t *ctxt = context; static int initialized; if (!initialized) { @@ -168,31 +184,32 @@ static void roto_prepare_frame(void *context, unsigned n_cpus, fb_fragment_t *fr fb_fragment_divide(fragment, n_cpus, res_frame->fragments); // This governs the rotation and color cycle. - r += FIXED_TO_INT(FIXED_MULT(FIXED_SIN(rr), FIXED_NEW(16))); - rr += 2; + ctxt->r += FIXED_TO_INT(FIXED_MULT(FIXED_SIN(ctxt->rr), FIXED_NEW(16))); + ctxt->rr += 2; } /* Draw a rotating checkered 256x256 texture into fragment. (32-bit version) */ static void roto32_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, stride = fragment->stride / 4, frame_width = fragment->frame_width, frame_height = fragment->frame_height; uint32_t *buf = 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(r); - sin_r = FIXED_SIN(r); + 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(rr), FIXED_NEW(127)) + FIXED_NEW(128)); - palette[0].g = (FIXED_MULT(FIXED_SIN(rr / 2), FIXED_NEW(127)) + FIXED_NEW(128)); - palette[0].b = (FIXED_MULT(FIXED_COS(rr / 3), FIXED_NEW(127)) + FIXED_NEW(128)); + 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(rr / 2), FIXED_NEW(127)) + FIXED_NEW(128)); - palette[1].g = (FIXED_MULT(FIXED_COS(rr / 2), FIXED_NEW(127)) + FIXED_NEW(128)); - palette[1].b = (FIXED_MULT(FIXED_SIN(rr), 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. */ @@ -225,23 +242,24 @@ 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, stride = fragment->stride / 8, 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(r); - sin_r = FIXED_SIN(r); + 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(rr), FIXED_NEW(127)) + FIXED_NEW(128)); - palette[0].g = (FIXED_MULT(FIXED_SIN(rr / 2), FIXED_NEW(127)) + FIXED_NEW(128)); - palette[0].b = (FIXED_MULT(FIXED_COS(rr / 3), FIXED_NEW(127)) + FIXED_NEW(128)); + 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(rr / 2), FIXED_NEW(127)) + FIXED_NEW(128)); - palette[1].g = (FIXED_MULT(FIXED_COS(rr / 2), FIXED_NEW(127)) + FIXED_NEW(128)); - palette[1].b = (FIXED_MULT(FIXED_SIN(rr), 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. */ @@ -282,6 +300,8 @@ static void roto64_render_fragment(void *context, fb_fragment_t *fragment) 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", @@ -292,6 +312,8 @@ rototiller_module_t roto32_module = { rototiller_module_t roto64_module = { + .create_context = roto_create_context, + .destroy_context = roto_destroy_context, .prepare_frame = roto_prepare_frame, .render_fragment = roto64_render_fragment, .name = "roto64", |