Add freetype-py

recipes/recipes_emscripten/freetype-py/emscripten-library-path.patch

@@ -0,0 +1,19 @@
+--- freetype/raw.py
++++ freetype/raw.py
+@@ -11,5 +11,6 @@
+ import os
+ import platform
++import glob
+ from ctypes import *
+ import ctypes.util
+
+@@ -29,4 +30,9 @@
+ else:
+     library_name = 'libfreetype.so'
+
++if system == 'Emscripten':
++    libraries = sorted(glob.glob('/lib/libfreetype.so*'))
++    if libraries:
++        library_name = libraries[0]
++
+ filename = os.path.join(os.path.dirname(freetype.__file__), library_name)

recipes/recipes_emscripten/freetype-py/recipe.yaml

@@ -0,0 +1,52 @@
+context:
+  version: "2.5.1"
+
+package:
+  name: freetype-py
+  version: ${{ version }}
+
+source:
+- url: https://files.pythonhosted.org/packages/d0/9c/61ba17f846b922c2d6d101cc886b0e8fb597c109cedfcb39b8c5d2304b54/freetype-py-${{ version }}.zip
+  sha256: cfe2686a174d0dd3d71a9d8ee9bf6a2c23f5872385cf8ce9f24af83d076e2fbd
+  patches:
+  - emscripten-library-path.patch
+
+build:
+  number: 0
+  script: ${{ PYTHON }} -m pip install . --no-deps ${{ PIP_ARGS }}
+
+requirements:
+  build:
+  - cross-python_${{ target_platform }}
+  - python
+  - pip
+  - setuptools
+  host:
+  - python
+  - pip
+  - setuptools
+  - freetype-shared
+  run:
+  - python
+  - freetype-shared
+
+tests:
+- script: pytester
+  files:
+    recipe:
+    - test_freetype_py.py
+  requirements:
+    build:
+    - pytester
+    run:
+    - pytester-run
+
+about:
+  homepage: https://github.com/rougier/freetype-py
+  license: BSD-3-Clause
+  license_file: LICENSE.txt
+  summary: Freetype Python bindings
+
+extra:
+  recipe-maintainers:
+  - Alex-PLACET

recipes/recipes_emscripten/freetype-py/test_freetype_py.py

@@ -0,0 +1,95 @@
+import freetype
+
+
+_FONT = """\
+STARTFONT 2.1
+FONT -misc-test-medium-r-normal--8-80-75-75-c-50-iso10646-1
+SIZE 8 75 75
+FONTBOUNDINGBOX 5 6 0 0
+STARTPROPERTIES 2
+FONT_ASCENT 6
+FONT_DESCENT 0
+ENDPROPERTIES
+CHARS 2
+STARTCHAR H
+ENCODING 72
+SWIDTH 625 0
+DWIDTH 5 0
+BBX 5 6 0 0
+BITMAP
+88
+88
+F8
+88
+88
+88
+ENDCHAR
+STARTCHAR i
+ENCODING 105
+SWIDTH 250 0
+DWIDTH 2 0
+BBX 2 6 0 0
+BITMAP
+40
+00
+C0
+40
+40
+E0
+ENDCHAR
+ENDFONT
+"""
+
+
+def test_render_text_to_bitmap(tmp_path):
+    font_path = tmp_path / "test.bdf"
+    font_path.write_text(_FONT)
+
+    face = freetype.Face(str(font_path))
+    face.set_pixel_sizes(0, 8)
+
+    rendered = []
+    pen_positions = []
+    pen_x = 0
+    for character in "Hi":
+        face.load_char(character, freetype.FT_LOAD_RENDER)
+        bitmap = face.glyph.bitmap
+        pixels = bytes(bitmap.buffer)
+
+        assert bitmap.width > 0
+        assert bitmap.rows > 0
+        assert any(pixels)
+        advance = face.glyph.advance.x >> 6
+        rendered.append(
+            (
+                face.glyph.bitmap_left,
+                bitmap.width,
+                bitmap.rows,
+                bitmap.pitch,
+                pixels,
+                advance,
+            )
+        )
+        pen_positions.append(pen_x)
+        pen_x += advance
+
+    height = max(item[2] for item in rendered)
+    canvas_width = max(
+        pen_x + left + bitmap_width
+        for pen_x, (left, bitmap_width, *_rest) in zip(pen_positions, rendered)
+    )
+    canvas = bytearray(canvas_width * height)
+    x = 0
+    for left, bitmap_width, bitmap_rows, pitch, pixels, advance in rendered:
+        for row in range(bitmap_rows):
+            start = row * abs(pitch)
+            for column in range(bitmap_width):
+                destination = x + left + column
+                source = start + column
+                if 0 <= destination < canvas_width and source < len(pixels):
+                    canvas[row * canvas_width + destination] = pixels[source]
+        x += advance
+
+    assert x == pen_x
+    assert len(canvas) == canvas_width * height
+    assert sum(canvas) > 0