initial commit

lain-rainbow.c

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+#include <stdio.h>
+#include <cairo.h>
+#define M_PI 3.14159265358979323846
+
+static double width, height;
+static char path_output[512];
+static cairo_t *cr;
+static cairo_surface_t *surface;
+
+struct rgb {
+    double r, g, b;
+} values[] = {
+    {0, .7, .9},
+    {.5, .9, .5},
+    {1., 1., .4},
+    {1., .8, .5},
+    {1., .6, .65},
+    {1., .4, .9},
+};
+#define NVALUES 6
+
+int start = 0;
+
+void lain_rainbow(cairo_t * cr) {
+    unsigned ii, jj;
+    double dy, dx, x0, y0, x1, y1, red, green, blue;
+
+    /* Outer black border */
+    red = green = blue = 1.;
+    cairo_set_line_width(cr, 0);
+    cairo_set_source_rgba(cr, red, green, blue, 1.);
+
+    cairo_rectangle(cr, 0, 0, width, height);
+    cairo_fill(cr);
+
+    /* Colors */
+    x1 = width;
+    dx = width / 36;
+    y1 = dy = height / 36;
+    x0 = 0;
+    y0 = 0;
+    for (ii = start, jj = 0; jj < 36; jj++, ii++) {
+        cairo_rectangle(cr, x0, y0, x1, y1);
+        cairo_set_source_rgba(cr, values[ii % NVALUES].r, values[ii % NVALUES].g, values[ii % NVALUES].b, 1.);
+        cairo_fill(cr);
+        y0 += dy;
+        x1 += dx;
+        y1 += dy;
+    }
+}
+
+int main(int argc, char **argv) {
+    int n;
+    width = 3840;
+    height = 2160;
+    sprintf (path_output, "stage1-00.png");
+    if (argc == 2) {
+        n = 0;
+        sscanf(argv[1], "%d", &n);
+        start = n;
+        sprintf (path_output, "stage1-%02d.png", n);
+    }
+    surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height);
+    cr = cairo_create(surface);
+    lain_rainbow(cr);
+    cairo_surface_write_to_png (surface, path_output);
+    cairo_surface_destroy(surface);
+    cairo_destroy(cr);
+    return 0;
+}

makefile

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+FRAMES = 00 01 02 03 04 05
+FRAMES_SUFFIX = .png
+STAGE1_NAME = stage1-
+STAGE2_NAME = stage2-
+STAGE1_FILES := $(addprefix $(STAGE1_NAME),$(FRAMES))
+STAGE1_FILES := $(addsuffix $(FRAMES_SUFFIX),$(STAGE1_FILES))
+STAGE2_FILES := $(addprefix $(STAGE2_NAME),$(FRAMES))
+STAGE2_FILES := $(addsuffix $(FRAMES_SUFFIX),$(STAGE2_FILES))
+
+all: $(STAGE1_FILES) $(STAGE2_FILES) lain.mp4
+
+lain-rainbow: lain-rainbow.c
+	$(CC) -W -Wall -Werror -Wextra -std=c89 $^ -o $@ $(shell pkg-config --cflags --libs cairo cairo-svg)
+
+$(STAGE1_NAME)%.png: lain-rainbow
+	./lain-rainbow $*
+
+$(STAGE2_NAME)%.png: $(STAGE1_NAME)%.png
+	composite lain.png $(STAGE1_NAME)$*.png $(STAGE2_NAME)$*.png
+
+lain.mp4: $(STAGE2_FILES)
+	ffmpeg -re -stream_loop -1 -y -i "$(STAGE2_NAME)%02d.png" -vf 'zoompan=d=.5:s=3840x2160:fps=2,framerate=25:interp_start=0:interp_end=255:scene=100' -c:v mpeg4 -maxrate 5M -q:v 2 -t 0:0:3 $@
+
+clean:
+	$(RM) lain-rainbow $(STAGE1_FILES) $(STAGE2_FILES)

readme.org

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+#MODE: -*- org -*-
+
+* Info
+
+  - ~original.gif~ is the original image
+  - ~drawing.svg~ is a vector of the important parts
+  - ~lain.xcf~ contains all ~source_images~ and masking to produce ~lain.png~
+  - ~lain.png~ is combined with 6 frames of ~stage1-%02d.png~ to produce ~stage2-%02d.png~
+  - ~stage2-%02d.png~ is merged into ~lain.mp4~ with ~ffmpeg~
+
+* Usage
+  #+BEGIN_SRC
+    mpv --loop=inf --vo=vdpau lain.mp4
+  #+END_SRC
+
+* Source Images
+  No idea where these came from. I guess around the net. Google.
+  You could probably reverse image search.
+
+* Dependencies
+  - cc
+  - mpv (for viewing)
+  - make
+  - imagemagick
+  - libcairo2-dev
+  - gimp (for editing xcf)
+  - inkscape (for editing svg)