From 82dc0ce7b8417779baec6a3cb16a37000c16edc8 Mon Sep 17 00:00:00 2001
From: Vito Caputo <vcaputo@pengaru.com>
Date: Sat, 22 Apr 2017 16:02:50 -0700
Subject: plasma: utilize context struct for module state
---
src/modules/plasma/plasma.c | 61 +++++++++++++++++++++++++++++----------------
1 file changed, 40 insertions(+), 21 deletions(-)
(limited to 'src/modules/plasma')
diff --git a/src/modules/plasma/plasma.c b/src/modules/plasma/plasma.c
index 9acd73f..9746882 100644
--- a/src/modules/plasma/plasma.c
+++ b/src/modules/plasma/plasma.c
@@ -1,6 +1,7 @@
#include <stdint.h>
#include <inttypes.h>
#include <math.h>
+#include <stdlib.h>
#include "fb.h"
#include "rototiller.h"
@@ -22,7 +23,10 @@ typedef struct color_t {
} color_t;
static int32_t costab[FIXED_TRIG_LUT_SIZE], sintab[FIXED_TRIG_LUT_SIZE];
-static unsigned rr;
+
+typedef struct plasma_context_t {
+ unsigned rr;
+} plasma_context_t;
static inline uint32_t color2pixel(color_t *color)
{
@@ -42,10 +46,23 @@ static void init_plasma(int32_t *costab, int32_t *sintab)
}
+static void * plasma_create_context(void)
+{
+ return calloc(1, sizeof(plasma_context_t));
+}
+
+
+static void plasma_destroy_context(void *context)
+{
+ free(context);
+}
+
+
/* Prepare a frame for concurrent drawing of fragment using multiple fragments */
static void plasma_prepare_frame(void *context, unsigned n_cpus, fb_fragment_t *fragment, rototiller_frame_t *res_frame)
{
- static int initialized;
+ plasma_context_t *ctxt = context;
+ static int initialized;
if (!initialized) {
initialized = 1;
@@ -56,34 +73,34 @@ static void plasma_prepare_frame(void *context, unsigned n_cpus, fb_fragment_t *
res_frame->n_fragments = n_cpus;
fb_fragment_divide(fragment, n_cpus, res_frame->fragments);
- rr += 3;
+ ctxt->rr += 3;
}
/* Draw a plasma effect */
static void plasma_render_fragment(void *context, fb_fragment_t *fragment)
{
-
- unsigned stride = fragment->stride / 4, width = fragment->width, height = fragment->height;
- int fw2 = FIXED_NEW(width / 2), fh2 = FIXED_NEW(height / 2);
- int x, y, cx, cy, dx2, dy2;
- uint32_t *buf = fragment->buf;
- color_t c = { .r = 0, .g = 0, .b = 0 }, cscale;
- unsigned rr2, rr6, rr8, rr16, rr20, rr12;
-
- rr2 = rr * 2;
- rr6 = rr * 6;
- rr8 = rr * 8;
- rr16 = rr * 16;
- rr20 = rr * 20;
- rr12 = rr * 12;
+ plasma_context_t *ctxt = context;
+ unsigned stride = fragment->stride / 4, width = fragment->width, height = fragment->height;
+ int fw2 = FIXED_NEW(width / 2), fh2 = FIXED_NEW(height / 2);
+ int x, y, cx, cy, dx2, dy2;
+ uint32_t *buf = fragment->buf;
+ color_t c = { .r = 0, .g = 0, .b = 0 }, cscale;
+ unsigned rr2, rr6, rr8, rr16, rr20, rr12;
+
+ rr2 = ctxt->rr * 2;
+ rr6 = ctxt->rr * 6;
+ rr8 = ctxt->rr * 8;
+ rr16 = ctxt->rr * 16;
+ rr20 = ctxt->rr * 20;
+ rr12 = ctxt->rr * 12;
/* vary the color channel intensities */
- cscale.r = FIXED_MULT(FIXED_COS(rr / 2), FIXED_NEW(64)) + FIXED_NEW(64);
- cscale.g = FIXED_MULT(FIXED_COS(rr / 5), FIXED_NEW(64)) + FIXED_NEW(64);
- cscale.b = FIXED_MULT(FIXED_COS(rr / 7), FIXED_NEW(64)) + FIXED_NEW(64);
+ cscale.r = FIXED_MULT(FIXED_COS(ctxt->rr / 2), FIXED_NEW(64)) + FIXED_NEW(64);
+ cscale.g = FIXED_MULT(FIXED_COS(ctxt->rr / 5), FIXED_NEW(64)) + FIXED_NEW(64);
+ cscale.b = FIXED_MULT(FIXED_COS(ctxt->rr / 7), FIXED_NEW(64)) + FIXED_NEW(64);
- cx = FIXED_TO_INT(FIXED_MULT(FIXED_COS(rr), fw2) + fw2);
+ cx = FIXED_TO_INT(FIXED_MULT(FIXED_COS(ctxt->rr), fw2) + fw2);
cy = FIXED_TO_INT(FIXED_MULT(FIXED_SIN(rr2), fh2) + fh2);
for (y = fragment->y; y < fragment->y + height; y++) {
@@ -128,6 +145,8 @@ static void plasma_render_fragment(void *context, fb_fragment_t *fragment)
}
rototiller_module_t plasma_module = {
+ .create_context = plasma_create_context,
+ .destroy_context = plasma_destroy_context,
.prepare_frame = plasma_prepare_frame,
.render_fragment = plasma_render_fragment,
.name = "plasma",
--
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