Stopped images having their height halved when using blocky printing

[rainbowstream.git] / rainbowstream / c_image.py

diff --git a/rainbowstream/c_image.py b/rainbowstream/c_image.py
index ec0e47e5114dd278a561cf19ce1c3163913a7b25..e4d450564d203a10ab92a03fe6e87d949dc81ae3 100644 (file)
--- a/rainbowstream/c_image.py
+++ b/rainbowstream/c_image.py
@@ -1,6 +1,7 @@
 from PIL import Image
 from os.path import join, dirname, getmtime, exists, expanduser
 from .config import *
+from .py3patch import *
 
 import ctypes
 import sys
@@ -8,11 +9,14 @@ import os
 
 
 def call_c():
+    """
+    Call the C program for converting RGB to Ansi colors
+    """
     library = expanduser('~/.image.so')
     sauce = join(dirname(__file__), 'image.c')
     if not exists(library) or getmtime(sauce) > getmtime(library):
-        build = "gcc -fPIC -shared -o %s %s" % (library, sauce)
-        assert os.system(build + " >/dev/null 2>&1") == 0
+        build = "cc -fPIC -shared -o %s %s" % (library, sauce)
+        os.system(build + " >/dev/null 2>&1")
     image_c = ctypes.cdll.LoadLibrary(library)
     image_c.init()
     return image_c.rgb_to_ansi
@@ -21,28 +25,52 @@ rgb2short = call_c()
 
 
 def pixel_print(ansicolor):
+    """
+    Print a pixel with given Ansi color
+    """
     sys.stdout.write('\033[48;5;%sm \033[0m' % (ansicolor))
 
 
-def image_to_display(path):
+def block_print(lower, higher):
+    """
+    Print two pixels arranged above each other with Ansi color.
+    Abuses Unicode to print two pixels in the space of one terminal block.
+    """
+    sys.stdout.write('\033[38;5;%sm\033[48;5;%sm▄\033[0m' % (higher, lower))
+
+
+def image_to_display(path, start=None, length=None):
+    """
+    Display an image
+    """
+    rows, columns = os.popen('stty size', 'r').read().split()
+    if not start:
+        start = c['IMAGE_SHIFT']
+    if not length:
+        length = int(columns) - 2 * start
     i = Image.open(path)
     i = i.convert('RGBA')
     w, h = i.size
     i.load()
-    rows, columns = os.popen('stty size', 'r').read().split()
-    width = min(w, int(columns) - 2 * IMAGE_SHIFT)
+    width = min(w, length)
     height = int(float(h) * (float(width) / float(w)))
-    height //= 2
     i = i.resize((width, height), Image.ANTIALIAS)
-    height = min(height, IMAGE_MAX_HEIGHT)
+    height = min(height, c['IMAGE_MAX_HEIGHT'])
 
-    for y in xrange(height):
-        print ' ' * IMAGE_SHIFT,
+    for real_y in xrange(height // 2):
+        sys.stdout.write(' ' * start)
         for x in xrange(width):
-            p = i.getpixel((x, y))
-            r, g, b = p[:3]
-            pixel_print(rgb2short(r, g, b))
-        print ''
+            y = real_y * 2
+            p0 = i.getpixel((x, y))
+            p1 = i.getpixel((x, y+1))
+            r0, g0, b0 = p0[:3]
+            r1, g1, b1 = p1[:3]
+            block_print(rgb2short(r0, g0, b0), rgb2short(r1, g1, b1))
+        sys.stdout.write('\n')
+
 
+"""
+For direct using purpose
+"""
 if __name__ == '__main__':
     image_to_display(sys.argv[1])