From 7e2c51dc2645c4dffe7cc33e8533f0667b8775a6 Mon Sep 17 00:00:00 2001
From: jaseg <jaseg@jaseg.net>
Date: Sun, 29 Dec 2013 02:52:28 +0100
Subject: Added basic text rendering & TCP server

---
 host/matelight/renderers.py | 55 +++++++++++++++++++++++++--------------------
 1 file changed, 31 insertions(+), 24 deletions(-)

(limited to 'host/matelight/renderers.py')

diff --git a/host/matelight/renderers.py b/host/matelight/renderers.py
index 0e223a2..f507513 100644
--- a/host/matelight/renderers.py
+++ b/host/matelight/renderers.py
@@ -1,11 +1,13 @@
-import numpy as np
+import time
 try:
 	import re2 as re
 except ImportError:
 	import re
+import numpy as np
 from PIL import Image
 from pixelterm import xtermcolors
 from config import *
+from font import *
 
 default_palette = [
 		(0x00, 0x00, 0x00), # 0 normal colors
@@ -24,17 +26,19 @@ default_palette = [
 		(0xff, 0x00, 0xff), # 13
 		(0x00, 0xff, 0xff), # 14
 		(0xff, 0xff, 0xff)] # 15
+default_colors = (default_palette[8], default_palette[0])
 
 class CharGenerator:
 	def __init__(self, seq=None, lg=None, text=''):
-		settings = False, False, False, default_palette[8], default_palette[0]
+		settings = False, False, False, default_colors
 		if lg:
-			settings = lg,bold, lg.blink, lg.underscore, lg.fg, lg.bg
-		self.bold, self.blink, self.underscore, self.fg, self.bg = settings
+			settings = lg.bold, lg.blink, lg.underscore, (lg.fg, lg.bg)
+		self.bold, self.blink, self.underscore, (self.fg, self.bg) = settings
 		self.text = text
-		self.parse_escape_sequence(seq)
+		if seq:
+			self.parse_escape_sequence(seq)
 
-	def parse_escape_sequence(seq):
+	def parse_escape_sequence(self, seq):
 		codes = list(map(int, seq[2:-1].split(';')))
 		fg, bg, reverse, i = self.fg, self.bg, False, 0
 		while i<len(codes):
@@ -49,7 +53,7 @@ class CharGenerator:
 			elif a == 49:
 				bg = (0,0,0)
 			elif a == 0:
-				fg, bg = (0,0,0), (0,0,0)
+				fg, bg = default_colors
 				self.bold, self.blink, self.underscore = False, False, False
 			elif a in range(30, 38):
 				fg = default_palette[a-30]
@@ -57,7 +61,7 @@ class CharGenerator:
 				fg = default_palette[a-90+8]
 			elif a in range(40, 48):
 				bg = default_palette[a-40]
-			elif a in range(100, 108):
+			elif a in range(101, 108):
 				bg = default_palette[a-100+8]
 			elif a == 7:
 				reverse = True
@@ -68,20 +72,22 @@ class CharGenerator:
 			elif a == 1: # Literally "bright", not bold.
 				self.bold = True
 			i += 1
-		fg, bg = bg, fg if reverse else fg, bg
+		fg, bg = (bg, fg) if reverse else (fg, bg)
 		self.fg, self.bg = fg, bg
 
 	def generate_char(self, c, now):
-		fg, bg = self.bg, self.bg if self.blink and now%1.0 < 0.3 else self.fg, self.bg
-		glyph = font.glyphs_by_codepoint[c]
+		fg, bg = (self.bg, self.fg) if self.blink and now%1.0 < 0.3 else (self.fg, self.bg)
+		glyph = FONT.glyphs_by_codepoint[ord(c)]
 		# Please forgive the string manipulation below.
 		lookup = {'0': bg, '1': fg}
-		return [ list(map(lookup.get, FONT_PADDED_BINARY(int(row, 16)))) for row in glyph.get_data() ]
+		FONT_PADDED_BINARY = ('{:0'+str(glyph.bbW)+'b}').format
+		FONT_Y_PAD = [[bg]*glyph.bbW]*(DISPLAY_HEIGHT-FONT_HEIGHT)
+		return np.swapaxes(np.array([ list(map(lookup.get, FONT_PADDED_BINARY(int(row, 16))[:glyph.bbW])) for row in glyph.get_data() ] + FONT_Y_PAD, dtype=np.uint8), 0, 1)
 
 	def generate(self, now):
 		chars = [self.generate_char(c, now) for c in self.text]
 		# This refers to inter-letter spacing
-		space = np.zeros((LETTER_SPACING, DISPLAY_HEIGHT, 3))
+		space = np.zeros((LETTER_SPACING, DISPLAY_HEIGHT, 3), dtype=np.uint8)
 		spaces = [space]*(len(chars)-1)
 		everything = chars + spaces
 		everything[::2] = chars
@@ -96,25 +102,26 @@ class TextRenderer:
 		"""
 		generators = []
 		current_generator = CharGenerator()
-		for esc, char in r'(\x1B\[[0-9;]+m)|(.)'.finditer(text):
+		for match in re.finditer('(\x1B\[[0-9;]+m)|(.)', text):
+			esc, char = match.groups()
 			if esc:
 				if current_generator.text != '':
 					generators.append(current_generator)
 				current_generator = CharGenerator(esc, current_generator)
 			elif char:
 				current_generator.text += char
-		self.generators = generators + [current_generator]
-
-	def frames(self, start):
-		now = time.time()
-		zeros = [np.zeros((DISPLAY_WIDTH, DISPLAY_HEIGHT, 3))]
+		generators = generators + [current_generator]
+		# Generate the actual frame buffer
+		zeros = [np.zeros((DISPLAY_WIDTH, DISPLAY_HEIGHT, 3), dtype=np.uint8)]
 		# Pad the array with one screen's worth of zeros on both sides so the text fully scrolls through.
-		raw = np.concatenate([zeros]+[g.generate(now) for g in generators]+[zeros])
-		w,h,_ = raw.size
-		for i in range(DISPLAY_WIDTH+w, 0, -1):
-			frame = raw[i:i+DISPLAY_WIDTH, :, :]
+		now = time.time()
+		self.raw = np.concatenate(zeros+[g.generate(now) for g in generators]+zeros)
+
+	def frames(self):
+		w,h,_ = self.raw.shape
+		for i in range(0, w-DISPLAY_WIDTH, 2):
+			frame = self.raw[i:i+DISPLAY_WIDTH, :, :]
 			yield frame, 1/DEFAULT_SCROLL_SPEED
-			raw = np.concatenate([zeros]+[g.generate(now) for g in generators]+[zeros])
 
 class ImageRenderer:
 	def __new__(cls, image_data):
-- 
cgit