pixbounce: add pixbounce module

3 files changed, 191 insertions, 0 deletions

diff --git a/src/modules/pixbounce/Makefile.am b/src/modules/pixbounce/Makefile.am
new file mode 100644
index 0000000..a55374a
--- /dev/null
+++ b/src/modules/pixbounce/Makefile.am
@@ -0,0 +1,3 @@
+noinst_LIBRARIES = libpixbounce.a
+libpixbounce_a_SOURCES = draw.h pixbounce.c
+libpixbounce_a_CPPFLAGS = -I@top_srcdir@/src
diff --git a/src/modules/pixbounce/draw.h b/src/modules/pixbounce/draw.h
new file mode 100644
index 0000000..0b68c00
--- /dev/null
+++ b/src/modules/pixbounce/draw.h
@@ -0,0 +1,16 @@
+#ifndef _DRAW_H
+#define _DRAW_H
+
+#include <stdint.h>
+
+/* helper for scaling rgb colors and packing them into an pixel */
+static inline uint32_t makergb(uint32_t r, uint32_t g, uint32_t b, float intensity)
+{
+	r = (((float)intensity) * r);
+	g = (((float)intensity) * g);
+	b = (((float)intensity) * b);
+
+	return (((r & 0xff) << 16) | ((g & 0xff) << 8) | (b & 0xff));
+}
+
+#endif
diff --git a/src/modules/pixbounce/pixbounce.c b/src/modules/pixbounce/pixbounce.c
new file mode 100644
index 0000000..764f559
--- /dev/null
+++ b/src/modules/pixbounce/pixbounce.c
@@ -0,0 +1,172 @@
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "draw.h"
+#include "rototiller.h"
+
+/* Copyright (C) 2018 Philip J. Freeman <elektron@halo.nu> */
+
+int pix_width = 16;
+int pix_height = 16;
+int num_pix = 4;
+
+char pix_map[][16*16] = {
+
+	{
+	0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0,
+	0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0,
+	0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0,
+	0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0,
+	0, 1, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0,
+	1, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1,
+	1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
+	1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
+	1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
+	0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0,
+	0, 1, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0,
+	0, 0, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0,
+	0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0,
+	0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0,
+	},
+
+	{
+	0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0,
+	1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1,
+	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+	1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1,
+	0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0,
+	},
+
+	{
+	0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0,
+	0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0,
+	0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0,
+	0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0,
+	1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1,
+	1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1,
+	1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1,
+	1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1,
+	1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1,
+	1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1,
+	0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0,
+	0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0,
+	0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0,
+	0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0,
+	},
+
+	{
+	0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0,
+	0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 0,
+	0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0,
+	0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0,
+	0, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0,
+	1, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1,
+	1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 1,
+	1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 1,
+	1, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1,
+	0, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0,
+	0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0,
+	0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0,
+	0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 0,
+	0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0,
+	},
+};
+
+/* randomly pick another pixmap from the list, excluding the current one. */
+static int pick_pix(int num_pics, int last_pic)
+{
+	int pix_num = last_pic;
+
+	while(pix_num == last_pic)
+		pix_num = rand() % num_pics;
+
+	return pix_num;
+}
+
+static void pixbounce_render_fragment(void *context, fb_fragment_t *fragment)
+{
+	static int	initialized=0;
+	static int	x, y, multiplier;
+	static int	x_dir, y_dir;
+	static int	pix_num;
+
+	int		width = fragment->width, height = fragment->height;
+
+	if(!initialized) {
+		srand(time(NULL) + getpid());
+		int multiplier_x = width / pix_width;
+		int multiplier_y = height / pix_height;
+		if(multiplier_x>multiplier_y) {
+			multiplier = multiplier_y * 77 / 100;
+		} else if(multiplier_y>multiplier_x) {
+			multiplier = multiplier_x * 77 / 100;
+		}
+		x = rand()%(width - (pix_width * multiplier));
+		y = rand()%(height - (pix_height * multiplier));
+		pix_num = rand() % num_pix;
+		x_dir = 1;
+		y_dir = 1;
+		initialized = 1;
+	}
+
+	/* blank the frame */
+	fb_fragment_zero(fragment);
+
+	/* translate pixmap to multiplier size and draw it to the fragment */
+	for(int cursor_y=0; cursor_y < pix_height*multiplier; cursor_y++) {
+		for(int cursor_x=0; cursor_x < pix_width*multiplier; cursor_x++) {
+			int pix_offset = ((cursor_y/multiplier)*pix_width) + (cursor_x/multiplier);
+			if(pix_map[pix_num][pix_offset] == 0) continue;
+			fb_fragment_put_pixel_unchecked(
+					fragment, x+cursor_x, y+cursor_y,
+					makergb(0xFF, 0xFF, 0xFF, 1)
+				);
+		}
+	}
+
+	/* update pixmap location */
+	if(x+x_dir < 0) {
+		x_dir = 1;
+		pix_num = pick_pix(num_pix, pix_num);
+	}
+	if((x+(pix_width*multiplier))+x_dir > width) {
+		x_dir = -1;
+		pix_num = pick_pix(num_pix, pix_num);
+	}
+	if(y+y_dir < 0) {
+		y_dir = 1;
+		pix_num = pick_pix(num_pix, pix_num);
+	}
+	if((y+(pix_height*multiplier))+y_dir > height) {
+		y_dir = -1;
+		pix_num = pick_pix(num_pix, pix_num);
+	}
+	x = x+x_dir;
+	y = y+y_dir;
+}
+
+rototiller_module_t	pixbounce_module = {
+	.render_fragment = pixbounce_render_fragment,
+	.name = "pixbounce",
+	.description = "pixmap bounce",
+	.author = "Philip J Freeman <elektron@halo.nu>",
+	.license = "GPLv2",
+};