modules/*: make use of generic fragmenters

Just one case, modules/submit, was using 32x32 tiles and is now
using 64x64.  I don't expect it to make any difference.

While here I fixed up the num_cpus/n_cpus naming inconsistencies,
normalizing on n_cpus.

22 files changed, 39 insertions, 153 deletions

diff --git a/src/modules/blinds/blinds.c b/src/modules/blinds/blinds.c
index 9996d8a..b14997e 100644
--- a/src/modules/blinds/blinds.c
+++ b/src/modules/blinds/blinds.c
@@ -35,7 +35,7 @@ static blinds_setup_t blinds_default_setup = {
 };
 
 
-static void * blinds_create_context(unsigned ticks, unsigned num_cpus, til_setup_t *setup)
+static void * blinds_create_context(unsigned ticks, unsigned n_cpus, til_setup_t *setup)
 {
 	blinds_context_t	*ctxt;
 
diff --git a/src/modules/checkers/checkers.c b/src/modules/checkers/checkers.c
index 99812cc..ba5f4c7 100644
--- a/src/modules/checkers/checkers.c
+++ b/src/modules/checkers/checkers.c
@@ -61,7 +61,7 @@ static checkers_setup_t checkers_default_setup = {
 };
 
 
-static void * checkers_create_context(unsigned ticks, unsigned num_cpus, til_setup_t *setup)
+static void * checkers_create_context(unsigned ticks, unsigned n_cpus, til_setup_t *setup)
 {
 	checkers_context_t	*ctxt;
 
diff --git a/src/modules/compose/compose.c b/src/modules/compose/compose.c
index 78ec75a..d672bf0 100644
--- a/src/modules/compose/compose.c
+++ b/src/modules/compose/compose.c
@@ -43,7 +43,7 @@ typedef struct compose_setup_t {
 	char			*layers[];
 } compose_setup_t;
 
-static void * compose_create_context(unsigned ticks, unsigned num_cpus, til_setup_t *setup);
+static void * compose_create_context(unsigned ticks, unsigned n_cpus, til_setup_t *setup);
 static void compose_destroy_context(void *context);
 static void compose_prepare_frame(void *context, unsigned ticks, unsigned n_cpus, til_fb_fragment_t *fragment, til_fragmenter_t *res_fragmenter);
 static int compose_setup(const til_settings_t *settings, til_setting_t **res_setting, const til_setting_desc_t **res_desc, til_setup_t **res_setup);
@@ -63,7 +63,7 @@ til_module_t	compose_module = {
 };
 
 
-static void * compose_create_context(unsigned ticks, unsigned num_cpus, til_setup_t *setup)
+static void * compose_create_context(unsigned ticks, unsigned n_cpus, til_setup_t *setup)
 {
 	compose_context_t	*ctxt;
 	size_t			n;
@@ -77,7 +77,7 @@ static void * compose_create_context(unsigned ticks, unsigned num_cpus, til_setu
 	if (!ctxt)
 		return NULL;
 
-	ctxt->n_cpus = num_cpus;
+	ctxt->n_cpus = n_cpus;
 
 	for (int i = 0; i < n; i++) {
 		const til_module_t	*layer_module;
diff --git a/src/modules/drizzle/drizzle.c b/src/modules/drizzle/drizzle.c
index 498b857..4fb62f6 100644
--- a/src/modules/drizzle/drizzle.c
+++ b/src/modules/drizzle/drizzle.c
@@ -42,7 +42,6 @@ typedef struct drizzle_setup_t {
 
 typedef struct drizzle_context_t {
 	puddle_t	*puddle;
-	unsigned	n_cpus;
 	drizzle_setup_t	setup;
 } drizzle_context_t;
 
@@ -73,7 +72,7 @@ static inline uint32_t color_to_uint32(v3f_t color) {
 }
 
 
-static void * drizzle_create_context(unsigned ticks, unsigned num_cpus, til_setup_t *setup)
+static void * drizzle_create_context(unsigned ticks, unsigned n_cpus, til_setup_t *setup)
 {
 	drizzle_context_t	*ctxt;
 
@@ -90,7 +89,6 @@ static void * drizzle_create_context(unsigned ticks, unsigned num_cpus, til_setu
 		return NULL;
 	}
 
-	ctxt->n_cpus = num_cpus;
 	ctxt->setup = *(drizzle_setup_t *)setup;
 
 	return ctxt;
@@ -106,19 +104,11 @@ static void drizzle_destroy_context(void *context)
 }
 
 
-static int drizzle_fragmenter(void *context, unsigned n_cpus, const til_fb_fragment_t *fragment, unsigned number, til_fb_fragment_t *res_fragment)
-{
-	drizzle_context_t	*ctxt = context;
-
-	return til_fb_fragment_slice_single(fragment, ctxt->n_cpus, number, res_fragment);
-}
-
-
 static void drizzle_prepare_frame(void *context, unsigned ticks, unsigned n_cpus, til_fb_fragment_t *fragment, til_fragmenter_t *res_fragmenter)
 {
 	drizzle_context_t	*ctxt = context;
 
-	*res_fragmenter = drizzle_fragmenter;
+	*res_fragmenter = til_fragmenter_slice_per_cpu;
 
 	for (int i = 0; i < DRIZZLE_CNT; i++) {
 		int	x = rand() % (PUDDLE_SIZE - 1);
diff --git a/src/modules/flui2d/flui2d.c b/src/modules/flui2d/flui2d.c
index e00dcca..dae73d8 100644
--- a/src/modules/flui2d/flui2d.c
+++ b/src/modules/flui2d/flui2d.c
@@ -243,7 +243,7 @@ static void gamma_init(float gamma)
 }
 
 
-static void * flui2d_create_context(unsigned ticks, unsigned num_cpus, til_setup_t *setup)
+static void * flui2d_create_context(unsigned ticks, unsigned n_cpus, til_setup_t *setup)
 {
 	static int		initialized;
 	flui2d_context_t	*ctxt;
@@ -276,19 +276,13 @@ static void flui2d_destroy_context(void *context)
 }
 
 
-static int flui2d_fragmenter(void *context, unsigned n_cpus, const til_fb_fragment_t *fragment, unsigned number, til_fb_fragment_t *res_fragment)
-{
-	return til_fb_fragment_tile_single(fragment, 64, number, res_fragment);
-}
-
-
 /* Prepare a frame for concurrent drawing of fragment using multiple fragments */
 static void flui2d_prepare_frame(void *context, unsigned ticks, unsigned n_cpus, til_fb_fragment_t *fragment, til_fragmenter_t *res_fragmenter)
 {
 	flui2d_context_t	*ctxt = context;
 	float			r = (ticks % (unsigned)(2 * M_PI * 1000)) * .001f;
 
-	*res_fragmenter = flui2d_fragmenter;
+	*res_fragmenter = til_fragmenter_tile64;
 
 	switch (ctxt->emitters) {
 	case FLUI2D_EMITTERS_FIGURE8: {
diff --git a/src/modules/julia/julia.c b/src/modules/julia/julia.c
index fc0f092..48f85da 100644
--- a/src/modules/julia/julia.c
+++ b/src/modules/julia/julia.c
@@ -19,7 +19,6 @@ typedef struct julia_context_t {
 	float		creal;
 	float		cimag;
 	float		threshold;
-	unsigned	n_cpus;
 } julia_context_t;
 
 static uint32_t	colors[] = {
@@ -66,7 +65,7 @@ static uint32_t	colors[] = {
 		};
 
 
-static void * julia_create_context(unsigned ticks, unsigned num_cpus, til_setup_t *setup)
+static void * julia_create_context(unsigned ticks, unsigned n_cpus, til_setup_t *setup)
 {
 	return calloc(1, sizeof(julia_context_t));
 }
@@ -102,21 +101,12 @@ static inline unsigned julia_iter(float real, float imag, float creal, float cim
 }
 
 
-static int julia_fragmenter(void *context, unsigned n_cpus, const til_fb_fragment_t *fragment, unsigned number, til_fb_fragment_t *res_fragment)
-{
-	julia_context_t	*ctxt = context;
-
-	return til_fb_fragment_slice_single(fragment, ctxt->n_cpus, number, res_fragment);
-}
-
-
 /* Prepare a frame for concurrent drawing of fragment using multiple fragments */
 static void julia_prepare_frame(void *context, unsigned ticks, unsigned n_cpus, til_fb_fragment_t *fragment, til_fragmenter_t *res_fragmenter)
 {
 	julia_context_t	*ctxt = context;
 
-	*res_fragmenter = julia_fragmenter;
-	ctxt->n_cpus = n_cpus;
+	*res_fragmenter = til_fragmenter_slice_per_cpu;
 
 	ctxt->rr += .01;
 			/* Rather than just sweeping creal,cimag from -2.0-+2.0, I try to keep things confined
diff --git a/src/modules/meta2d/meta2d.c b/src/modules/meta2d/meta2d.c
index 327a4d9..01bbc58 100644
--- a/src/modules/meta2d/meta2d.c
+++ b/src/modules/meta2d/meta2d.c
@@ -39,7 +39,6 @@ typedef struct meta2d_context_t {
 	unsigned	n;
 	din_t		*din_a, *din_b;
 	float		din_t;
-	unsigned	n_cpus;
 	meta2d_ball_t	balls[META2D_NUM_BALLS];
 } meta2d_context_t;
 
@@ -66,7 +65,7 @@ static inline uint32_t color_to_uint32(v3f_t color) {
 }
 
 
-static void * meta2d_create_context(unsigned ticks, unsigned num_cpus, til_setup_t *setup)
+static void * meta2d_create_context(unsigned ticks, unsigned n_cpus, til_setup_t *setup)
 {
 	meta2d_context_t	*ctxt;
 
@@ -76,8 +75,6 @@ static void * meta2d_create_context(unsigned ticks, unsigned num_cpus, til_setup
 	ctxt->din_a = din_new(10, 10, META2D_NUM_BALLS + 2);
 	ctxt->din_b = din_new(10, 10, META2D_NUM_BALLS + 2);
 
-	ctxt->n_cpus = num_cpus;
-
 	for (int i = 0; i < META2D_NUM_BALLS; i++) {
 		meta2d_ball_t	*ball = &ctxt->balls[i];
 
@@ -100,19 +97,11 @@ static void meta2d_destroy_context(void *context)
 }
 
 
-static int meta2d_fragmenter(void *context, unsigned n_cpus, const til_fb_fragment_t *fragment, unsigned number, til_fb_fragment_t *res_fragment)
-{
-	meta2d_context_t	*ctxt = context;
-
-	return til_fb_fragment_slice_single(fragment, ctxt->n_cpus, number, res_fragment);
-}
-
-
 static void meta2d_prepare_frame(void *context, unsigned ticks, unsigned n_cpus, til_fb_fragment_t *fragment, til_fragmenter_t *res_fragmenter)
 {
 	meta2d_context_t	*ctxt = context;
 
-	*res_fragmenter = meta2d_fragmenter;
+	*res_fragmenter = til_fragmenter_slice_per_cpu;
 
 	/* move the balls around */
 	for (int i = 0; i < META2D_NUM_BALLS; i++) {
diff --git a/src/modules/montage/montage.c b/src/modules/montage/montage.c
index 19562db..8444616 100644
--- a/src/modules/montage/montage.c
+++ b/src/modules/montage/montage.c
@@ -15,7 +15,7 @@ typedef struct montage_context_t {
 } montage_context_t;
 
 static void setup_next_module(montage_context_t *ctxt);
-static void * montage_create_context(unsigned ticks, unsigned num_cpus, til_setup_t *setup);
+static void * montage_create_context(unsigned ticks, unsigned n_cpus, til_setup_t *setup);
 static void montage_destroy_context(void *context);
 static void montage_prepare_frame(void *context, unsigned ticks, unsigned n_cpus, til_fb_fragment_t *fragment, til_fragmenter_t *res_fragmenter);
 static void montage_render_fragment(void *context, unsigned ticks, unsigned cpu, til_fb_fragment_t *fragment);
@@ -31,7 +31,7 @@ til_module_t	montage_module = {
 };
 
 
-static void * montage_create_context(unsigned ticks, unsigned num_cpus, til_setup_t *setup)
+static void * montage_create_context(unsigned ticks, unsigned n_cpus, til_setup_t *setup)
 {
 	const til_module_t	**modules, *rtv_module, *compose_module;
 	size_t			n_modules;
diff --git a/src/modules/pixbounce/pixbounce.c b/src/modules/pixbounce/pixbounce.c
index 67f35a9..e864763 100644
--- a/src/modules/pixbounce/pixbounce.c
+++ b/src/modules/pixbounce/pixbounce.c
@@ -129,7 +129,6 @@ char pix_map[][16*16] = {
 };
 
 typedef struct pixbounce_context_t {
-	unsigned	n_cpus;
 	int		x, y;
 	int		x_dir, y_dir;
 	int		pix_num;
@@ -154,7 +153,7 @@ static uint32_t pick_color()
 	return makergb(rand()%256, rand()%256, rand()%256, 1);
 }
 
-static void * pixbounce_create_context(unsigned ticks, unsigned num_cpus, til_setup_t *setup)
+static void * pixbounce_create_context(unsigned ticks, unsigned n_cpus, til_setup_t *setup)
 {
 	pixbounce_context_t *ctxt;
 
@@ -162,7 +161,6 @@ static void * pixbounce_create_context(unsigned ticks, unsigned num_cpus, til_se
 	if (!ctxt)
 		return NULL;
 
-	ctxt->n_cpus = num_cpus;
 	ctxt->x = -1;
 	ctxt->y = -1;
 	ctxt->x_dir = 0;
diff --git a/src/modules/plasma/plasma.c b/src/modules/plasma/plasma.c
index a498f6d..d319d90 100644
--- a/src/modules/plasma/plasma.c
+++ b/src/modules/plasma/plasma.c
@@ -32,7 +32,6 @@ static int32_t	costab[FIXED_TRIG_LUT_SIZE], sintab[FIXED_TRIG_LUT_SIZE];
 
 typedef struct plasma_context_t {
 	unsigned	rr;
-	unsigned	n_cpus;
 } plasma_context_t;
 
 
@@ -52,7 +51,7 @@ static void init_plasma(int32_t *costab, int32_t *sintab)
 }
 
 
-static void * plasma_create_context(unsigned ticks, unsigned num_cpus, til_setup_t *setup)
+static void * plasma_create_context(unsigned ticks, unsigned n_cpus, til_setup_t *setup)
 {
 	static int	initialized;
 
@@ -72,21 +71,12 @@ static void plasma_destroy_context(void *context)
 }
 
 
-static int plasma_fragmenter(void *context, unsigned n_cpus, const til_fb_fragment_t *fragment, unsigned number, til_fb_fragment_t *res_fragment)
-{
-	plasma_context_t	*ctxt = context;
-
-	return til_fb_fragment_slice_single(fragment, ctxt->n_cpus, number, res_fragment);
-}
-
-
 /* Prepare a frame for concurrent drawing of fragment using multiple fragments */
 static void plasma_prepare_frame(void *context, unsigned ticks, unsigned n_cpus, til_fb_fragment_t *fragment, til_fragmenter_t *res_fragmenter)
 {
 	plasma_context_t	*ctxt = context;
 
-	*res_fragmenter = plasma_fragmenter;
-	ctxt->n_cpus = n_cpus;
+	*res_fragmenter = til_fragmenter_slice_per_cpu;
 	ctxt->rr += 3;
 }
 
diff --git a/src/modules/plato/plato.c b/src/modules/plato/plato.c
index ec53dd1..163a785 100644
--- a/src/modules/plato/plato.c
+++ b/src/modules/plato/plato.c
@@ -49,7 +49,6 @@
 
 
 typedef struct plato_context_t {
-	unsigned	n_cpus;
 	float		r;
 } plato_context_t;
 
@@ -609,7 +608,7 @@ static void draw_polyhedron(const polyhedron_t *polyhedron, m4f_t *transform, ti
 }
 
 
-static void * plato_create_context(unsigned ticks, unsigned num_cpus, til_setup_t *setup)
+static void * plato_create_context(unsigned ticks, unsigned n_cpus, til_setup_t *setup)
 {
 	plato_context_t	*ctxt;
 
@@ -617,8 +616,6 @@ static void * plato_create_context(unsigned ticks, unsigned num_cpus, til_setup_
 	if (!ctxt)
 		return NULL;
 
-	ctxt->n_cpus = num_cpus;
-
 	return ctxt;
 }
 
diff --git a/src/modules/ray/ray.c b/src/modules/ray/ray.c
index 6ecb2ff..2b3c836 100644
--- a/src/modules/ray/ray.c
+++ b/src/modules/ray/ray.c
@@ -130,7 +130,7 @@ typedef struct ray_context_t {
 } ray_context_t;
 
 
-static void * ray_create_context(unsigned ticks, unsigned num_cpus, til_setup_t *setup)
+static void * ray_create_context(unsigned ticks, unsigned n_cpus, til_setup_t *setup)
 {
 	return calloc(1, sizeof(ray_context_t));
 }
@@ -142,18 +142,12 @@ static void ray_destroy_context(void *context)
 }
 
 
-static int ray_fragmenter(void *context, unsigned n_cpus, const til_fb_fragment_t *fragment, unsigned number, til_fb_fragment_t *res_fragment)
-{
-	return til_fb_fragment_tile_single(fragment, 64, number, res_fragment);
-}
-
-
 /* prepare a frame for concurrent rendering */
 static void ray_prepare_frame(void *context, unsigned ticks, unsigned n_cpus, til_fb_fragment_t *fragment, til_fragmenter_t *res_fragmenter)
 {
 	ray_context_t	*ctxt = context;
 
-	*res_fragmenter = ray_fragmenter;
+	*res_fragmenter = til_fragmenter_tile64;
 #if 1
 	/* animated point light source */
 
diff --git a/src/modules/roto/roto.c b/src/modules/roto/roto.c
index 98fffc0..06a9e11 100644
--- a/src/modules/roto/roto.c
+++ b/src/modules/roto/roto.c
@@ -25,14 +25,13 @@ typedef struct color_t {
 
 typedef struct roto_context_t {
 	unsigned	r, rr;
-	unsigned	n_cpus;
 } 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 void * roto_create_context(unsigned ticks, unsigned num_cpus, til_setup_t *setup)
+static void * roto_create_context(unsigned ticks, unsigned n_cpus, til_setup_t *setup)
 {
 	return calloc(1, sizeof(roto_context_t));
 }
@@ -169,14 +168,6 @@ static void init_roto(uint8_t texture[256][256], int32_t *costab, int32_t *sinta
 }
 
 
-static int roto_fragmenter(void *context, unsigned n_cpus, const til_fb_fragment_t *fragment, unsigned number, til_fb_fragment_t *res_fragment)
-{
-	roto_context_t	*ctxt = context;
-
-	return til_fb_fragment_slice_single(fragment, ctxt->n_cpus, number, res_fragment);
-}
-
-
 /* prepare a frame for concurrent rendering */
 static void roto_prepare_frame(void *context, unsigned ticks, unsigned n_cpus, til_fb_fragment_t *fragment, til_fragmenter_t *res_fragmenter)
 {
@@ -189,8 +180,7 @@ static void roto_prepare_frame(void *context, unsigned ticks, unsigned n_cpus, t
 		init_roto(texture, costab, sintab);
 	}
 
-	*res_fragmenter = roto_fragmenter;
-	ctxt->n_cpus = n_cpus;
+	*res_fragmenter = til_fragmenter_slice_per_cpu;
 
 	// This governs the rotation and color cycle.
 	ctxt->r += FIXED_TO_INT(FIXED_MULT(FIXED_SIN(ctxt->rr), FIXED_NEW(16)));
diff --git a/src/modules/rtv/rtv.c b/src/modules/rtv/rtv.c
index f50d9a8..ef6be98 100644
--- a/src/modules/rtv/rtv.c
+++ b/src/modules/rtv/rtv.c
@@ -33,8 +33,6 @@ typedef struct rtv_channel_t {
 } rtv_channel_t;
 
 typedef struct rtv_context_t {
-	unsigned		n_cpus;
-
 	time_t			next_switch, next_hide_caption;
 	rtv_channel_t		*channel, *last_channel;
 	txt_t			*caption;
@@ -61,7 +59,7 @@ typedef struct rtv_setup_t {
 } rtv_setup_t;
 
 static void setup_next_channel(rtv_context_t *ctxt, unsigned ticks);
-static void * rtv_create_context(unsigned ticks, unsigned num_cpus, til_setup_t *setup);
+static void * rtv_create_context(unsigned ticks, unsigned n_cpus, til_setup_t *setup);
 static void rtv_destroy_context(void *context);
 static void rtv_prepare_frame(void *context, unsigned ticks, unsigned n_cpus, til_fb_fragment_t *fragment, til_fragmenter_t *res_fragmenter);
 static void rtv_finish_frame(void *context, unsigned ticks, til_fb_fragment_t *fragment);
@@ -207,7 +205,7 @@ static int rtv_should_skip_module(const rtv_setup_t *setup, const til_module_t *
 }
 
 
-static void * rtv_create_context(unsigned ticks, unsigned num_cpus, til_setup_t *setup)
+static void * rtv_create_context(unsigned ticks, unsigned n_cpus, til_setup_t *setup)
 {
 	rtv_context_t		*ctxt;
 	const til_module_t	**modules;
@@ -228,7 +226,6 @@ static void * rtv_create_context(unsigned ticks, unsigned num_cpus, til_setup_t
 	if (!ctxt)
 		return NULL;
 
-	ctxt->n_cpus = num_cpus;
 	ctxt->duration = ((rtv_setup_t *)setup)->duration;
 	ctxt->context_duration = ((rtv_setup_t *)setup)->context_duration;
 	ctxt->snow_duration = ((rtv_setup_t *)setup)->snow_duration;
diff --git a/src/modules/snow/snow.c b/src/modules/snow/snow.c
index 685d1bc..dc49a1a 100644
--- a/src/modules/snow/snow.c
+++ b/src/modules/snow/snow.c
@@ -15,7 +15,7 @@ typedef union snow_seed_t {
 } snow_seed_t;
 
 typedef struct snow_context_t {
-	unsigned	n_cpus;
+	unsigned	unused;
 	snow_seed_t	seeds[];
 } snow_context_t;
 
@@ -31,8 +31,6 @@ static void * snow_create_context(unsigned ticks, unsigned n_cpus, til_setup_t *
 	for (unsigned i = 0; i < n_cpus; i++)
 		ctxt->seeds[i].seed = rand();
 
-	ctxt->n_cpus = n_cpus;
-
 	return ctxt;
 }
 
@@ -43,17 +41,9 @@ static void snow_destroy_context(void *context)
 }
 
 
-static int snow_fragmenter(void *context, unsigned n_cpus, const til_fb_fragment_t *fragment, unsigned number, til_fb_fragment_t *res_fragment)
-{
-	snow_context_t	*ctxt = context;
-
-	return til_fb_fragment_slice_single(fragment, ctxt->n_cpus, number, res_fragment);
-}
-
-
 static void snow_prepare_frame(void *context, unsigned ticks, unsigned n_cpus, til_fb_fragment_t *fragment, til_fragmenter_t *res_fragmenter)
 {
-	*res_fragmenter = snow_fragmenter;
+	*res_fragmenter = til_fragmenter_slice_per_cpu;
 }
 
 
diff --git a/src/modules/sparkler/sparkler.c b/src/modules/sparkler/sparkler.c
index e4e241d..08d0e9a 100644
--- a/src/modules/sparkler/sparkler.c
+++ b/src/modules/sparkler/sparkler.c
@@ -26,7 +26,6 @@ typedef struct sparkler_setup_t {
 
 typedef struct sparkler_context_t {
 	particles_t		*particles;
-	unsigned		n_cpus;
 	sparkler_setup_t	setup;
 } sparkler_context_t;
 
@@ -34,7 +33,7 @@ extern particle_ops_t	simple_ops;
 
 static sparkler_setup_t sparkler_default_setup;
 
-static void * sparkler_create_context(unsigned ticks, unsigned num_cpus, til_setup_t *setup)
+static void * sparkler_create_context(unsigned ticks, unsigned n_cpus, til_setup_t *setup)
 {
 	sparkler_context_t	*ctxt;
 
@@ -73,19 +72,11 @@ static void sparkler_destroy_context(void *context)
 }
 
 
-static int sparkler_fragmenter(void *context, unsigned n_cpus, const til_fb_fragment_t *fragment, unsigned number, til_fb_fragment_t *res_fragment)
+static void sparkler_prepare_frame(void *context, unsigned ticks, unsigned n_cpus, til_fb_fragment_t *fragment, til_fragmenter_t *res_fragmenter)
 {
 	sparkler_context_t	*ctxt = context;
 
-	return til_fb_fragment_slice_single(fragment, ctxt->n_cpus, number, res_fragment);
-}
-
-static void sparkler_prepare_frame(void *context, unsigned ticks, unsigned ncpus, til_fb_fragment_t *fragment, til_fragmenter_t *res_fragmenter)
-{
-	sparkler_context_t	*ctxt = context;
-
-	*res_fragmenter = sparkler_fragmenter;
-	ctxt->n_cpus = ncpus;
+	*res_fragmenter = til_fragmenter_slice_per_cpu;
 
 	if (ctxt->setup.show_bsp_matches)
 		til_fb_fragment_clear(fragment);
diff --git a/src/modules/spiro/spiro.c b/src/modules/spiro/spiro.c
index 50a44e8..f588638 100644
--- a/src/modules/spiro/spiro.c
+++ b/src/modules/spiro/spiro.c
@@ -29,7 +29,7 @@ typedef struct spiro_context_t {
 } spiro_context_t;
 
 
-static void * spiro_create_context(unsigned ticks, unsigned num_cpus, til_setup_t *setup)
+static void * spiro_create_context(unsigned ticks, unsigned n_cpus, til_setup_t *setup)
 {
 	spiro_context_t *ctxt;
 	float		z;
diff --git a/src/modules/stars/stars.c b/src/modules/stars/stars.c
index 0629c36..43e7622 100644
--- a/src/modules/stars/stars.c
+++ b/src/modules/stars/stars.c
@@ -49,7 +49,7 @@ float get_random_unit_coord() {
 }
 
 
-static void * stars_create_context(unsigned ticks, unsigned num_cpus, til_setup_t *setup)
+static void * stars_create_context(unsigned ticks, unsigned n_cpus, til_setup_t *setup)
 {
 	stars_context_t *ctxt;
 	float		z;
diff --git a/src/modules/submit/submit.c b/src/modules/submit/submit.c
index ebda531..f0be5eb 100644
--- a/src/modules/submit/submit.c
+++ b/src/modules/submit/submit.c
@@ -265,7 +265,7 @@ static void setup_grid(submit_context_t *ctxt)
 }
 
 
-static void * submit_create_context(unsigned ticks, unsigned num_cpus, til_setup_t *setup)
+static void * submit_create_context(unsigned ticks, unsigned n_cpus, til_setup_t *setup)
 {
 	submit_context_t	*ctxt;
 
@@ -292,17 +292,11 @@ static void submit_destroy_context(void *context)
 }
 
 
-static int submit_fragmenter(void *context, unsigned n_cpus, const til_fb_fragment_t *fragment, unsigned number, til_fb_fragment_t *res_fragment)
-{
-	return til_fb_fragment_tile_single(fragment, 32, number, res_fragment);
-}
-
-
 static void submit_prepare_frame(void *context, unsigned ticks, unsigned n_cpus, til_fb_fragment_t *fragment, til_fragmenter_t *res_fragmenter)
 {
 	submit_context_t	*ctxt = context;
 
-	*res_fragmenter = submit_fragmenter;
+	*res_fragmenter = til_fragmenter_tile64;
 
 	if (ctxt->game_winner)
 		setup_grid(ctxt);
diff --git a/src/modules/swab/swab.c b/src/modules/swab/swab.c
index 63d5649..8c71049 100644
--- a/src/modules/swab/swab.c
+++ b/src/modules/swab/swab.c
@@ -31,7 +31,6 @@
 typedef struct swab_context_t {
 	din_t		*din;
 	float		r;
-	unsigned	n_cpus;
 } swab_context_t;
 
 typedef struct color_t {
@@ -65,7 +64,7 @@ static inline uint32_t color_to_uint32(color_t color) {
 }
 
 
-static void * swab_create_context(unsigned ticks, unsigned num_cpus, til_setup_t *setup)
+static void * swab_create_context(unsigned ticks, unsigned n_cpus, til_setup_t *setup)
 {
 	swab_context_t	*ctxt;
 
@@ -92,22 +91,13 @@ static void swab_destroy_context(void *context)
 }
 
 
-static int swab_fragmenter(void *context, unsigned n_cpus, const til_fb_fragment_t *fragment, unsigned number, til_fb_fragment_t *res_fragment)
-{
-	swab_context_t	*ctxt = context;
-
-	return til_fb_fragment_tile_single(fragment, 64, number, res_fragment);
-}
-
-
 static void swab_prepare_frame(void *context, unsigned ticks, unsigned n_cpus, til_fb_fragment_t *fragment, til_fragmenter_t *res_fragmenter)
 {
 	swab_context_t	*ctxt = context;
 
-	*res_fragmenter = swab_fragmenter;
+	*res_fragmenter = til_fragmenter_tile64;
 
 	ctxt->r += .0001f;
-	ctxt->n_cpus = n_cpus;
 }
 
 
diff --git a/src/modules/swarm/swarm.c b/src/modules/swarm/swarm.c
index 0271693..e2381ab 100644
--- a/src/modules/swarm/swarm.c
+++ b/src/modules/swarm/swarm.c
@@ -179,7 +179,7 @@ static inline uint32_t color_to_uint32(v3f_t color) {
 }
 
 
-static void * swarm_create_context(unsigned ticks, unsigned num_cpus, til_setup_t *setup)
+static void * swarm_create_context(unsigned ticks, unsigned n_cpus, til_setup_t *setup)
 {
 	swarm_context_t	*ctxt;
 
diff --git a/src/modules/voronoi/voronoi.c b/src/modules/voronoi/voronoi.c
index 204746f..ea90389 100644
--- a/src/modules/voronoi/voronoi.c
+++ b/src/modules/voronoi/voronoi.c
@@ -77,7 +77,7 @@ static void voronoi_randomize(voronoi_context_t *ctxt)
 }
 
 
-static void * voronoi_create_context(unsigned ticks, unsigned num_cpus, til_setup_t *setup)
+static void * voronoi_create_context(unsigned ticks, unsigned n_cpus, til_setup_t *setup)
 {
 	voronoi_context_t	*ctxt;
 
@@ -105,14 +105,6 @@ static void voronoi_destroy_context(void *context)
 }
 
 
-static int voronoi_fragmenter(void *context, unsigned n_cpus, const til_fb_fragment_t *fragment, unsigned number, til_fb_fragment_t *res_fragment)
-{
-	voronoi_context_t	*ctxt = context;
-
-	return til_fb_fragment_tile_single(fragment, 64, number, res_fragment);
-}
-
-
 static inline size_t voronoi_cell_origin_to_distance_idx(const voronoi_context_t *ctxt, const voronoi_cell_t *cell)
 {
 	size_t	x, y;
@@ -289,7 +281,7 @@ static void voronoi_prepare_frame(void *context, unsigned ticks, unsigned n_cpus
 {
 	voronoi_context_t	*ctxt = context;
 
-	*res_fragmenter = voronoi_fragmenter;
+	*res_fragmenter = til_fragmenter_tile64;
 
 	if (!ctxt->distances.buf ||
 	    ctxt->distances.width != fragment->frame_width ||