Introduce decimal point font (#314)

* Introduce decimal point font * Add png of font * Add getting a decimal point str from int * Move font out of utils * Clang format * set Readme.md as main page in docs * Add font generator * kind of fix font * Fix image oddities * Added pip install pillow to build_ci_workflow * Added ensurepip * Update Docker/CI for font generation * Fix CI * Fix CI forreal * Another CI fix * Fix directory name for rom * Adjust directory * Dummy commit for test * Revert "Dummy commit for test" This reverts commit b607085c1322c824d2fdd800ab3c3700389ad3a6. * dos2unix and update .gitignore * Delete the generated font file * Delete the generated font file * remove dot from font * Update include/font.h Co-authored-by: MeirGavish <meir.gavish@gmail.com> --------- Co-authored-by: MeirGavish <meir.gavish@gmail.com>
2025-12-18 18:19:01 -08:00
parent faa75a4eea
commit 628c0c992d
12 changed files with 258 additions and 27 deletions
@@ -0,0 +1,116 @@
+#!/usr/bin/env python3
+
+from PIL import Image, ImageOps
+import argparse
+
+CHAR_WIDTH = 8
+CHAR_HEIGHT = 8
+NUM_VERT_CHARS = 6
+NUM_HORZ_CHARS = 16
+WORD_SIZE = 32
+
+parser = argparse.ArgumentParser()
+parser.add_argument("-i", "--input",  required=True, help="input file")
+parser.add_argument("-o", "--output", required=True, help="output file")
+
+args = parser.parse_args()
+
+in_path  = args.input
+out_path = args.output
+
+# The font is stored in a 4-bit colormap png and is made of a grid of
+# 16x6 characters:
+#   |-------------16---------------|
+# | [][][][][][][][][][][][][][][][]
+# | [][][][][][][][][][][][][][][][]
+# 6 [][][][][][][][][][][][][][][][]
+# | [][][][][][][][][][][][][][][][]
+# | [][][][][][][][][][][][][][][][]
+# | [][][][][][][][][][][][][][][][]
+# 
+# Each character is a bitmap of 8x8 pixels.
+#
+# For example, the ! : 
+#
+# ___00___
+# ___00___
+# ___00___
+# ___00___
+# ___00___
+# ___00___
+# ________
+# ___00___
+# 
+# The font file is organized to go character-by-character and left-to-right
+
+img = Image.open(in_path)
+img = img.convert("P")
+img = img.convert('1')
+img = ImageOps.invert(img)
+
+glyphs = []
+for char_y in range(NUM_VERT_CHARS):
+    for char_x in range(NUM_HORZ_CHARS):
+        # Get the 8x8 crop area at our current character in the image
+        pix_x = char_x * CHAR_WIDTH
+        pix_y = char_y * CHAR_HEIGHT
+        crop_area = (pix_x, pix_y, pix_x + CHAR_WIDTH, pix_y + CHAR_HEIGHT)
+        
+        pixel_block_img = img.crop(crop_area)
+        pixels = list(pixel_block_img.getdata())
+
+        word0 = 0
+        word1 = 0
+        for i, pixel in enumerate(pixels):
+            bit = 1 if pixel > 0 else 0
+            if i < WORD_SIZE:
+                word0 = word0 | (bit << i)
+            else:
+                word1 = word1 | (bit << (i - WORD_SIZE))
+        glyphs.append((word0, word1))
+
+NUM_WORDS_IN_ROW = 8
+first = True
+
+with open(out_path, "w") as out:
+    out.write("""
+
+@{{BLOCK(gbalatro_sys8)
+
+    .section .rodata
+    .align	2
+    .global	gbalatro_sys8Font
+gbalatro_sys8Font:
+    .word	gbalatro_sys8Glyphs, 0, 0
+    .hword	32, 96
+    .byte	8, 8
+    .byte	8, 8
+    .hword	8
+    .byte	1, 0
+
+    .section .rodata
+    .align	2
+    .global gbalatro_sys8Glyphs		@ 768 bytes (192 unsigned ints)
+gbalatro_sys8Glyphs:
+""")
+    
+    for i, glyph in enumerate(glyphs):
+        if first:
+            out.write("    .word ")
+            first = False
+
+        out.write(f"0x{glyph[0]:08X},0x{glyph[1]:08X}")
+
+        # This checks to see if we have reached NUM_WORDS_IN_ROW words, (divided by
+        # 2 because that's the number of entries in each char[])
+        if (((i + 1) % (NUM_WORDS_IN_ROW // 2)) == 0):
+            out.write("\n")
+            if i != (len(glyphs) - 1):
+                out.write("    .word ")
+        else:
+            out.write(",")
+            
+
+    out.write("\n")
+    out.write("\n")
+    out.write('@}}BLOCK(gbalatro_sys8)\n')