Merge remote-tracking branch 'upstream/master' into anchor-part3

# Conflicts:
#	Tests/test_imagefontctl.py

.ci/install.sh

@@ -33,7 +33,8 @@ pip install pyroma
 pip install test-image-results
 pip install numpy
 
-# TODO Remove when 3.9 includes setuptools 49.3.2+:
+# TODO Remove when 3.8 / 3.9 includes setuptools 49.3.2+:
+if [ "$GHA_PYTHON_VERSION" == "3.8" ]; then pip install -U "setuptools>=49.3.2" ; fi
 if [ "$GHA_PYTHON_VERSION" == "3.9" ]; then pip install -U "setuptools>=49.3.2" ; fi
 
 if [[ $TRAVIS_PYTHON_VERSION == 3.* ]]; then

.github/workflows/test-windows.yml

@@ -63,9 +63,9 @@ jobs:
     - name: pip install wheel pytest pytest-cov
       run: python -m pip install wheel pytest pytest-cov
 
-    # TODO Remove when 3.9 includes setuptools 49.3.2+:
+    # TODO Remove when 3.8 / 3.9 includes setuptools 49.3.2+:
     - name: Upgrade setuptools
-      if: "contains(matrix.python-version, '3.9')"
+      if: "contains(matrix.python-version, '3.8') || contains(matrix.python-version, '3.9')"
       run: python -m pip install -U "setuptools>=49.3.2"
 
     - name: Install dependencies
@@ -105,6 +105,10 @@ jobs:
     - name: Build dependencies / WebP
       if: steps.build-cache.outputs.cache-hit != 'true'
       run: "& winbuild\\build\\build_dep_libwebp.cmd"
+    # for FreeType CBDT font support
+    - name: Build dependencies / libpng
+      if: steps.build-cache.outputs.cache-hit != 'true'
+      run: "& winbuild\\build\\build_dep_libpng.cmd"
     - name: Build dependencies / FreeType
       if: steps.build-cache.outputs.cache-hit != 'true'
       run: "& winbuild\\build\\build_dep_freetype.cmd"

Tests/fonts/LICENSE.txt

@@ -2,15 +2,20 @@
 NotoNastaliqUrdu-Regular.ttf and NotoSansSymbols-Regular.ttf, from https://github.com/googlei18n/noto-fonts
 NotoSans-Regular.ttf, from https://www.google.com/get/noto/
 NotoSansJP-Thin.otf, from https://www.google.com/get/noto/help/cjk/
+NotoColorEmoji.ttf, from https://github.com/googlefonts/noto-emoji
 AdobeVFPrototype.ttf, from https://github.com/adobe-fonts/adobe-variable-font-prototype
 TINY5x3GX.ttf, from http://velvetyne.fr/fonts/tiny
 ArefRuqaa-Regular.ttf, from https://github.com/google/fonts/tree/master/ofl/arefruqaa
 ter-x20b.pcf, from http://terminus-font.sourceforge.net/
+BungeeColor-Regular_colr_Windows.ttf, from https://github.com/djrrb/bungee
 
 All of the above fonts are published under the SIL Open Font License (OFL) v1.1 (http://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&id=OFL), which allows you to copy, modify, and redistribute them if you need to.
 
 OpenSansCondensed-LightItalic.tt, from https://fonts.google.com/specimen/Open+Sans, under Apache License 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
 
+DejaVuSans-24-{1,2,4,8}-stripped.ttf are based on DejaVuSans.ttf converted using FontForge to add bitmap strikes and keep only the ASCII range.
+
+
 10x20-ISO8859-1.pcf, from https://packages.ubuntu.com/xenial/xfonts-base
 
 "Public domain font.  Share and enjoy."

Tests/helper.py

@@ -11,6 +11,7 @@ import tempfile
 from io import BytesIO
 
 import pytest
+from packaging.version import parse as parse_version
 
 from PIL import Image, ImageMath, features
 
@@ -162,6 +163,16 @@ def skip_unless_feature(feature):
     return pytest.mark.skipif(not features.check(feature), reason=reason)
 
 
+def skip_unless_feature_version(feature, version_required, reason=None):
+    if not features.check(feature):
+        return pytest.mark.skip(f"{feature} not available")
+    if reason is None:
+        reason = f"{feature} is older than {version_required}"
+    version_required = parse_version(version_required)
+    version_available = parse_version(features.version(feature))
+    return pytest.mark.skipif(version_available < version_required, reason=reason)
+
+
 @pytest.mark.skipif(sys.platform.startswith("win32"), reason="Requires Unix or macOS")
 class PillowLeakTestCase:
     # requires unix/macOS

Tests/test_decompression_bomb.py

@@ -60,6 +60,10 @@ class TestDecompressionBomb:
         with pytest.raises(Image.DecompressionBombError):
             Image.open("Tests/images/decompression_bomb.gif")
 
+    def test_exception_bmp(self):
+        with pytest.raises(Image.DecompressionBombError):
+            Image.open("Tests/images/bmp/b/reallybig.bmp")
+
 
 class TestDecompressionCrop:
     @classmethod

Tests/test_image.py

@@ -498,6 +498,12 @@ class TestImage:
         with pytest.raises(ValueError):
             Image.core.fill("RGB", (2, -2), (0, 0, 0))
 
+    def test_one_item_tuple(self):
+        for mode in ("I", "F", "L"):
+            im = Image.new(mode, (100, 100), (5,))
+            px = im.load()
+            assert px[0, 0] == 5
+
     def test_linear_gradient_wrong_mode(self):
         # Arrange
         wrong_mode = "RGB"

Tests/test_image_access.py

@@ -330,21 +330,22 @@ class TestCffi(AccessTest):
 class TestImagePutPixelError(AccessTest):
     IMAGE_MODES1 = ["L", "LA", "RGB", "RGBA"]
     IMAGE_MODES2 = ["I", "I;16", "BGR;15"]
-    INVALID_TYPES1 = ["foo", 1.0, None]
-    INVALID_TYPES2 = [*INVALID_TYPES1, (10,)]
+    INVALID_TYPES = ["foo", 1.0, None]
 
     @pytest.mark.parametrize("mode", IMAGE_MODES1)
     def test_putpixel_type_error1(self, mode):
         im = hopper(mode)
-        for v in self.INVALID_TYPES1:
+        for v in self.INVALID_TYPES:
             with pytest.raises(TypeError, match="color must be int or tuple"):
                 im.putpixel((0, 0), v)
 
     @pytest.mark.parametrize("mode", IMAGE_MODES2)
     def test_putpixel_type_error2(self, mode):
         im = hopper(mode)
-        for v in self.INVALID_TYPES2:
-            with pytest.raises(TypeError, match="color must be int"):
+        for v in self.INVALID_TYPES:
+            with pytest.raises(
+                TypeError, match="color must be int or single-element tuple"
+            ):
                 im.putpixel((0, 0), v)
 
     @pytest.mark.parametrize("mode", IMAGE_MODES1 + IMAGE_MODES2)

Tests/test_imagechops.py

@@ -311,8 +311,8 @@ def test_subtract():
 
     # Assert
     assert new.getbbox() == (25, 50, 76, 76)
-    assert new.getpixel((50, 50)) == GREEN
-    assert new.getpixel((50, 51)) == BLACK
+    assert new.getpixel((50, 51)) == GREEN
+    assert new.getpixel((50, 52)) == BLACK
 
 
 def test_subtract_scale_offset():
@@ -350,8 +350,8 @@ def test_subtract_modulo():
 
     # Assert
     assert new.getbbox() == (25, 50, 76, 76)
-    assert new.getpixel((50, 50)) == GREEN
-    assert new.getpixel((50, 51)) == BLACK
+    assert new.getpixel((50, 51)) == GREEN
+    assert new.getpixel((50, 52)) == BLACK
 
 
 def test_subtract_modulo_no_clip():

Tests/test_imagedraw.py

@@ -164,6 +164,19 @@ def test_arc_width_non_whole_angle():
     assert_image_similar_tofile(im, expected, 1)
 
 
+def test_arc_high():
+    # Arrange
+    im = Image.new("RGB", (200, 200))
+    draw = ImageDraw.Draw(im)
+
+    # Act
+    draw.arc([10, 10, 89, 189], 20, 330, width=20, fill="white")
+    draw.arc([110, 10, 189, 189], 20, 150, width=20, fill="white")
+
+    # Assert
+    assert_image_equal(im, Image.open("Tests/images/imagedraw_arc_high.png"))
+
+
 def test_bitmap():
     # Arrange
     im = Image.new("RGB", (W, H))
@@ -194,13 +207,11 @@ def helper_chord(mode, bbox, start, end):
 def test_chord1():
     for mode in ["RGB", "L"]:
         helper_chord(mode, BBOX1, 0, 180)
-        helper_chord(mode, BBOX1, 0.5, 180.4)
 
 
 def test_chord2():
     for mode in ["RGB", "L"]:
         helper_chord(mode, BBOX2, 0, 180)
-        helper_chord(mode, BBOX2, 0.5, 180.4)
 
 
 def test_chord_width():
@@ -240,6 +251,18 @@ def test_chord_zero_width():
         assert_image_equal(im, expected)
 
 
+def test_chord_too_fat():
+    # Arrange
+    im = Image.new("RGB", (100, 100))
+    draw = ImageDraw.Draw(im)
+
+    # Act
+    draw.chord([-150, -150, 99, 99], 15, 60, width=10, fill="white", outline="red")
+
+    # Assert
+    assert_image_equal(im, Image.open("Tests/images/imagedraw_chord_too_fat.png"))
+
+
 def helper_ellipse(mode, bbox):
     # Arrange
     im = Image.new(mode, (W, H))
@@ -282,15 +305,18 @@ def test_ellipse_edge():
     draw = ImageDraw.Draw(im)
 
     # Act
-    draw.ellipse(((0, 0), (W - 1, H)), fill="white")
+    draw.ellipse(((0, 0), (W - 1, H - 1)), fill="white")
 
     # Assert
     assert_image_similar_tofile(im, "Tests/images/imagedraw_ellipse_edge.png", 1)
 
 
 def test_ellipse_symmetric():
-    for bbox in [(25, 25, 76, 76), (25, 25, 75, 75)]:
-        im = Image.new("RGB", (101, 101))
+    for width, bbox in (
+        (100, (24, 24, 75, 75)),
+        (101, (25, 25, 75, 75)),
+    ):
+        im = Image.new("RGB", (width, 100))
         draw = ImageDraw.Draw(im)
         draw.ellipse(bbox, fill="green", outline="blue")
         assert_image_equal(im, im.transpose(Image.FLIP_LEFT_RIGHT))
@@ -345,6 +371,43 @@ def test_ellipse_zero_width():
         assert_image_equal(im, expected)
 
 
+def ellipse_various_sizes_helper(filled):
+    ellipse_sizes = range(32)
+    image_size = sum(ellipse_sizes) + len(ellipse_sizes) + 1
+    im = Image.new("RGB", (image_size, image_size))
+    draw = ImageDraw.Draw(im)
+
+    x = 1
+    for w in ellipse_sizes:
+        y = 1
+        for h in ellipse_sizes:
+            border = [x, y, x + w - 1, y + h - 1]
+            if filled:
+                draw.ellipse(border, fill="white")
+            else:
+                draw.ellipse(border, outline="white")
+            y += h + 1
+        x += w + 1
+
+    return im
+
+
+def test_ellipse_various_sizes():
+    im = ellipse_various_sizes_helper(False)
+
+    with Image.open("Tests/images/imagedraw_ellipse_various_sizes.png") as expected:
+        assert_image_equal(im, expected)
+
+
+def test_ellipse_various_sizes_filled():
+    im = ellipse_various_sizes_helper(True)
+
+    with Image.open(
+        "Tests/images/imagedraw_ellipse_various_sizes_filled.png"
+    ) as expected:
+        assert_image_equal(im, expected)
+
+
 def helper_line(points):
     # Arrange
     im = Image.new("RGB", (W, H))
@@ -420,13 +483,13 @@ def helper_pieslice(bbox, start, end):
 
 
 def test_pieslice1():
-    helper_pieslice(BBOX1, -90, 45)
-    helper_pieslice(BBOX1, -90.5, 45.4)
+    helper_pieslice(BBOX1, -92, 46)
+    helper_pieslice(BBOX1, -92.2, 46.2)
 
 
 def test_pieslice2():
-    helper_pieslice(BBOX2, -90, 45)
-    helper_pieslice(BBOX2, -90.5, 45.4)
+    helper_pieslice(BBOX2, -92, 46)
+    helper_pieslice(BBOX2, -92.2, 46.2)
 
 
 def test_pieslice_width():
@@ -467,6 +530,18 @@ def test_pieslice_zero_width():
         assert_image_equal(im, expected)
 
 
+def test_pieslice_wide():
+    # Arrange
+    im = Image.new("RGB", (200, 100))
+    draw = ImageDraw.Draw(im)
+
+    # Act
+    draw.pieslice([0, 0, 199, 99], 190, 170, width=10, fill="white", outline="red")
+
+    # Assert
+    assert_image_equal(im, Image.open("Tests/images/imagedraw_pieslice_wide.png"))
+
+
 def helper_point(points):
     # Arrange
     im = Image.new("RGB", (W, H))

Tests/test_imagedraw2.py

@@ -79,7 +79,7 @@ def test_ellipse_edge():
     brush = ImageDraw2.Brush("white")
 
     # Act
-    draw.ellipse(((0, 0), (W - 1, H)), brush)
+    draw.ellipse(((0, 0), (W - 1, H - 1)), brush)
 
     # Assert
     assert_image_similar(im, Image.open("Tests/images/imagedraw_ellipse_edge.png"), 1)

Tests/test_imagefont.py

@@ -18,6 +18,7 @@ from .helper import (
     is_pypy,
     is_win32,
     skip_unless_feature,
+    skip_unless_feature_version,
 )
 
 FONT_PATH = "Tests/fonts/FreeMono.ttf"
@@ -901,18 +902,120 @@ class TestImageFont:
                 lambda: d.multiline_textbbox((0, 0), "foo\nbar", anchor=anchor),
             )
 
+    @skip_unless_feature("freetype2")
+    @pytest.mark.parametrize("bpp", (1, 2, 4, 8))
+    def test_bitmap_font(self, bpp):
+        text = "Bitmap Font"
+        layout_name = ["basic", "raqm"][self.LAYOUT_ENGINE]
+        target = f"Tests/images/bitmap_font_{bpp}_{layout_name}.png"
+        font = ImageFont.truetype(
+            f"Tests/fonts/DejaVuSans-24-{bpp}-stripped.ttf",
+            24,
+            layout_engine=self.LAYOUT_ENGINE,
+        )
+
+        im = Image.new("RGB", (160, 35), "white")
+        draw = ImageDraw.Draw(im)
+        draw.text((2, 2), text, "black", font)
+
+        assert_image_equal_tofile(im, target)
+
+    def test_standard_embedded_color(self):
+        txt = "Hello World!"
+        ttf = ImageFont.truetype(FONT_PATH, 40, layout_engine=self.LAYOUT_ENGINE)
+        ttf.getsize(txt)
+
+        im = Image.new("RGB", (300, 64), "white")
+        d = ImageDraw.Draw(im)
+        d.text((10, 10), txt, font=ttf, fill="#fa6", embedded_color=True)
+
+        with Image.open("Tests/images/standard_embedded.png") as expected:
+            assert_image_similar(im, expected, max(self.metrics["multiline"], 3))
+
+    @skip_unless_feature_version("freetype2", "2.5.0")
+    @pytest.mark.xfail(is_pypy(), reason="failing on PyPy with Raqm")
+    def test_cbdt(self):
+        try:
+            font = ImageFont.truetype(
+                "Tests/fonts/NotoColorEmoji.ttf",
+                size=109,
+                layout_engine=self.LAYOUT_ENGINE,
+            )
+
+            im = Image.new("RGB", (150, 150), "white")
+            d = ImageDraw.Draw(im)
+
+            d.text((10, 10), "\U0001f469", embedded_color=True, font=font)
+
+            with Image.open("Tests/images/cbdt_notocoloremoji.png") as expected:
+                assert_image_similar(im, expected, self.metrics["multiline"])
+        except IOError as e:
+            assert str(e) in ("unimplemented feature", "unknown file format")
+            pytest.skip("freetype compiled without libpng or unsupported")
+
+    @skip_unless_feature_version("freetype2", "2.5.0")
+    @pytest.mark.xfail(is_pypy(), reason="failing on PyPy with Raqm")
+    def test_cbdt_mask(self):
+        try:
+            font = ImageFont.truetype(
+                "Tests/fonts/NotoColorEmoji.ttf",
+                size=109,
+                layout_engine=self.LAYOUT_ENGINE,
+            )
+
+            im = Image.new("RGB", (150, 150), "white")
+            d = ImageDraw.Draw(im)
+
+            d.text((10, 10), "\U0001f469", "black", font=font)
+
+            with Image.open("Tests/images/cbdt_notocoloremoji_mask.png") as expected:
+                assert_image_similar(im, expected, self.metrics["multiline"])
+        except IOError as e:
+            assert str(e) in ("unimplemented feature", "unknown file format")
+            pytest.skip("freetype compiled without libpng or unsupported")
+
+    @skip_unless_feature_version("freetype2", "2.10.0")
+    def test_colr(self):
+        font = ImageFont.truetype(
+            "Tests/fonts/BungeeColor-Regular_colr_Windows.ttf",
+            size=64,
+            layout_engine=self.LAYOUT_ENGINE,
+        )
+
+        im = Image.new("RGB", (300, 75), "white")
+        d = ImageDraw.Draw(im)
+
+        d.text((15, 5), "Bungee", embedded_color=True, font=font)
+
+        with Image.open("Tests/images/colr_bungee.png") as expected:
+            assert_image_similar(im, expected, 21)
+
+    @skip_unless_feature_version("freetype2", "2.10.0")
+    def test_colr_mask(self):
+        font = ImageFont.truetype(
+            "Tests/fonts/BungeeColor-Regular_colr_Windows.ttf",
+            size=64,
+            layout_engine=self.LAYOUT_ENGINE,
+        )
+
+        im = Image.new("RGB", (300, 75), "white")
+        d = ImageDraw.Draw(im)
+
+        d.text((15, 5), "Bungee", "black", font=font)
+
+        with Image.open("Tests/images/colr_bungee_mask.png") as expected:
+            assert_image_similar(im, expected, 22)
+
 
 @skip_unless_feature("raqm")
 class TestImageFont_RaqmLayout(TestImageFont):
     LAYOUT_ENGINE = ImageFont.LAYOUT_RAQM
 
 
+@skip_unless_feature_version("freetype2", "2.4", "Different metrics")
 def test_render_mono_size():
     # issue 4177
 
-    if parse_version(ImageFont.core.freetype2_version) < parse_version("2.4"):
-        pytest.skip("Different metrics")
-
     im = Image.new("P", (100, 30), "white")
     draw = ImageDraw.Draw(im)
     ttf = ImageFont.truetype(

Tests/test_imagefont_bitmap.py

@@ -1,42 +0,0 @@
-import pytest
-
-from PIL import Image, ImageDraw, ImageFont
-
-from .helper import assert_image_similar
-
-image_font_installed = True
-try:
-    ImageFont.core.getfont
-except ImportError:
-    image_font_installed = False
-
-
-@pytest.mark.skipif(not image_font_installed, reason="Image font not installed")
-def test_similar():
-    text = "EmbeddedBitmap"
-    font_outline = ImageFont.truetype(font="Tests/fonts/DejaVuSans.ttf", size=24)
-    font_bitmap = ImageFont.truetype(font="Tests/fonts/DejaVuSans-bitmap.ttf", size=24)
-    size_outline = font_outline.getsize(text)
-    size_bitmap = font_bitmap.getsize(text)
-    size_final = (
-        max(size_outline[0], size_bitmap[0]),
-        max(size_outline[1], size_bitmap[1]),
-    )
-    im_bitmap = Image.new("RGB", size_final, (255, 255, 255))
-    im_outline = im_bitmap.copy()
-    draw_bitmap = ImageDraw.Draw(im_bitmap)
-    draw_outline = ImageDraw.Draw(im_outline)
-
-    # Metrics are different on the bitmap and TTF fonts,
-    # more so on some platforms and versions of FreeType than others.
-    # Mac has a 1px difference, Linux doesn't.
-    draw_bitmap.text(
-        (0, size_final[1] - size_bitmap[1]), text, fill=(0, 0, 0), font=font_bitmap
-    )
-    draw_outline.text(
-        (0, size_final[1] - size_outline[1]),
-        text,
-        fill=(0, 0, 0),
-        font=font_outline,
-    )
-    assert_image_similar(im_bitmap, im_outline, 20)

Tests/test_imagefontctl.py

@@ -3,7 +3,11 @@ from packaging.version import parse as parse_version
 
 from PIL import Image, ImageDraw, ImageFont, features
 
-from .helper import assert_image_similar, skip_unless_feature
+from .helper import (
+    assert_image_similar,
+    skip_unless_feature,
+    skip_unless_feature_version,
+)
 
 FONT_SIZE = 20
 FONT_PATH = "Tests/fonts/DejaVuSans.ttf"
@@ -262,13 +266,13 @@ def test_getlength_combine(mode, direction, text):
             pytest.skip("libraqm 0.7 or greater not available")
 
 
-@pytest.mark.parametrize("anchor", ("lt", "mm", "rb", "sm"))
-def test_anchor_ttb(anchor):
-    if parse_version(features.version_module("freetype2")) < parse_version("2.5.1"):
 # FreeType 2.5.1 README: Miscellaneous Changes:
 # Improved computation of emulated vertical metrics for TrueType fonts.
-        pytest.skip("FreeType <2.5.1 has incompatible ttb metrics")
-
+@skip_unless_feature_version(
+    "freetype2", "2.5.1", "FreeType <2.5.1 has incompatible ttb metrics"
+)
+@pytest.mark.parametrize("anchor", ("lt", "mm", "rb", "sm"))
+def test_anchor_ttb(anchor):
     text = "f"
     path = f"Tests/images/test_anchor_ttb_{text}_{anchor}.png"
     f = ImageFont.truetype("Tests/fonts/NotoSans-Regular.ttf", 120)

docs/installation.rst

@@ -438,11 +438,11 @@ These platforms are built and tested for every change.
 +----------------------------------+--------------------------+-----------------------+
 | Fedora 32                        | 3.8                      |x86-64                 |
 +----------------------------------+--------------------------+-----------------------+
-| macOS 10.15 Catalina             | 3.6, 3.7, 3.8, PyPy3     |x86-64                 |
+| macOS 10.15 Catalina             | 3.6, 3.7, 3.8, 3.9, PyPy3|x86-64                 |
 +----------------------------------+--------------------------+-----------------------+
 | Ubuntu Linux 16.04 LTS (Xenial)  | 3.6, 3.7, 3.8, PyPy3     |x86-64                 |
 +----------------------------------+--------------------------+-----------------------+
-| Ubuntu Linux 18.04 LTS (Bionic)  | 3.6, 3.7, 3.8, PyPy3     |x86-64                 |
+| Ubuntu Linux 18.04 LTS (Bionic)  | 3.6, 3.7, 3.8, 3.9, PyPy3|x86-64                 |
 +----------------------------------+--------------------------+-----------------------+
 | Ubuntu Linux 20.04 LTS (Focal)   | 3.8                      |x86-64                 |
 +----------------------------------+--------------------------+-----------------------+
@@ -450,7 +450,7 @@ These platforms are built and tested for every change.
 |                                  +--------------------------+-----------------------+
 |                                  | 3.6                      |x86-64                 |
 +----------------------------------+--------------------------+-----------------------+
-| Windows Server 2019              | 3.6, 3.7, 3.8            |x86, x86-64            |
+| Windows Server 2019              | 3.6, 3.7, 3.8, 3.9       |x86, x86-64            |
 |                                  +--------------------------+-----------------------+
 |                                  | PyPy3                    |x86                    |
 |                                  +--------------------------+-----------------------+

docs/reference/ImageDraw.rst

@@ -291,7 +291,7 @@ Methods
 
     Draw a shape.
 
-.. py:method:: ImageDraw.text(xy, text, fill=None, font=None, anchor=None, spacing=4, align="left", direction=None, features=None, language=None, stroke_width=0, stroke_fill=None)
+.. py:method:: ImageDraw.text(xy, text, fill=None, font=None, anchor=None, spacing=4, align="left", direction=None, features=None, language=None, stroke_width=0, stroke_fill=None, embedded_color=False)
 
     Draws the string at the given position.
 
@@ -352,7 +352,12 @@ Methods
 
         .. versionadded:: 6.2.0
 
-.. py:method:: ImageDraw.multiline_text(xy, text, fill=None, font=None, anchor=None, spacing=4, align="left", direction=None, features=None, language=None)
+    :param embedded_color: Whether to use font embedded color glyphs (COLR or CBDT).
+
+                    .. versionadded:: 8.0.0
+
+
+.. py:method:: ImageDraw.multiline_text(xy, text, fill=None, font=None, anchor=None, spacing=4, align="left", direction=None, features=None, language=None, stroke_width=0, stroke_fill=None, embedded_color=False)
 
     Draws the string at the given position.
 
@@ -399,6 +404,19 @@ Methods
 
                      .. versionadded:: 6.0.0
 
+    :param stroke_width: The width of the text stroke.
+
+                     .. versionadded:: 6.2.0
+
+    :param stroke_fill: Color to use for the text stroke. If not given, will default to
+                        the ``fill`` parameter.
+
+                     .. versionadded:: 6.2.0
+
+    :param embedded_color: Whether to use font embedded color glyphs (COLR or CBDT).
+
+                     .. versionadded:: 8.0.0
+
 .. py:method:: ImageDraw.textsize(text, font=None, spacing=4, direction=None, features=None, language=None, stroke_width=0)
 
     Return the size of the given string, in pixels.

docs/releasenotes/8.0.0.rst

@@ -86,15 +86,11 @@ A new method :py:meth:`.ImageDraw.regular_polygon`, draws a regular polygon of `
 For example ``draw.regular_polygon(((100, 100), 50), 5)``
 draws a pentagon centered at the point ``(100, 100)`` with a polygon radius of ``50``.
 
-Security
-========
-
-TODO
-
 Other Changes
 =============
 
-TODO
-^^^^
+Error for large BMP files
+^^^^^^^^^^^^^^^^^^^^^^^^^
 
-TODO
+Previously, if a BMP file was too large, an ``OSError`` would be raised. Now,
+``DecompressionBombError`` is used instead, as Pillow already uses for other formats.

src/PIL/BmpImagePlugin.py

@@ -162,10 +162,6 @@ class BmpImageFile(ImageFile.ImageFile):
             else (1 << file_info["bits"])
         )
 
-        # ------------------------------- Check abnormal values for DOS attacks
-        if file_info["width"] * file_info["height"] > 2 ** 31:
-            raise OSError("Unsupported BMP Size: (%dx%d)" % self.size)
-
         # ---------------------- Check bit depth for unusual unsupported values
         self.mode, raw_mode = BIT2MODE.get(file_info["bits"], (None, None))
         if self.mode is None:

src/PIL/Image.py

@@ -3285,7 +3285,7 @@ class Exif(MutableMapping):
         return value
 
     def _fixup_dict(self, src_dict):
-        # Helper function for _getexif()
+        # Helper function
         # returns a dict with any single item tuples/lists as individual values
         return {k: self._fixup(v) for k, v in src_dict.items()}
 

src/PIL/ImageDraw.py

@@ -118,7 +118,7 @@ class ImageDraw:
                 fill = self.draw.draw_ink(fill)
         return ink, fill
 
-    def arc(self, xy, start, end, fill=None, width=0):
+    def arc(self, xy, start, end, fill=None, width=1):
         """Draw an arc."""
         ink, fill = self._getink(fill)
         if ink is not None:
@@ -282,6 +282,7 @@ class ImageDraw:
         language=None,
         stroke_width=0,
         stroke_fill=None,
+        embedded_color=False,
         *args,
         **kwargs,
     ):
@@ -299,8 +300,12 @@ class ImageDraw:
                 language,
                 stroke_width,
                 stroke_fill,
+                embedded_color,
             )
 
+        if embedded_color and self.mode not in ("RGB", "RGBA"):
+            raise ValueError("Embedded color supported only in RGB and RGBA modes")
+
         if font is None:
             font = self.getfont()
 
@@ -311,16 +316,20 @@ class ImageDraw:
             return ink
 
         def draw_text(ink, stroke_width=0, stroke_offset=None):
+            mode = self.fontmode
+            if stroke_width == 0 and embedded_color:
+                mode = "RGBA"
             coord = xy
             try:
                 mask, offset = font.getmask2(
                     text,
-                    self.fontmode,
+                    mode,
                     direction=direction,
                     features=features,
                     language=language,
                     stroke_width=stroke_width,
                     anchor=anchor,
+                    ink=ink,
                     *args,
                     **kwargs,
                 )
@@ -329,12 +338,13 @@ class ImageDraw:
                 try:
                     mask = font.getmask(
                         text,
-                        self.fontmode,
+                        mode,
                         direction,
                         features,
                         language,
                         stroke_width,
                         anchor,
+                        ink,
                         *args,
                         **kwargs,
                     )
@@ -342,6 +352,14 @@ class ImageDraw:
                     mask = font.getmask(text)
             if stroke_offset:
                 coord = coord[0] + stroke_offset[0], coord[1] + stroke_offset[1]
+            if mode == "RGBA":
+                # font.getmask2(mode="RGBA") returns color in RGB bands and mask in A
+                # extract mask and set text alpha
+                color, mask = mask, mask.getband(3)
+                color.fillband(3, (ink >> 24) & 0xFF)
+                coord2 = coord[0] + mask.size[0], coord[1] + mask.size[1]
+                self.im.paste(color, coord + coord2, mask)
+            else:
                 self.draw.draw_bitmap(coord, mask, ink)
 
         ink = getink(fill)
@@ -374,6 +392,7 @@ class ImageDraw:
         language=None,
         stroke_width=0,
         stroke_fill=None,
+        embedded_color=False,
     ):
         if direction == "ttb":
             raise ValueError("ttb direction is unsupported for multiline text")
@@ -435,6 +454,7 @@ class ImageDraw:
                 language=language,
                 stroke_width=stroke_width,
                 stroke_fill=stroke_fill,
+                embedded_color=embedded_color,
             )
             top += line_spacing
 

src/PIL/ImageFont.py

@@ -413,7 +413,7 @@ class FreeTypeFont:
         """
         # vertical offset is added for historical reasons
         # see https://github.com/python-pillow/Pillow/pull/4910#discussion_r486682929
-        size, offset = self.font.getsize(text, False, direction, features, language)
+        size, offset = self.font.getsize(text, "L", direction, features, language)
         return (
             size[0] + stroke_width * 2,
             size[1] + stroke_width * 2 + offset[1],
@@ -500,12 +500,14 @@ class FreeTypeFont:
         language=None,
         stroke_width=0,
         anchor=None,
+        ink=0,
     ):
         """
         Create a bitmap for the text.
 
         If the font uses antialiasing, the bitmap should have mode ``L`` and use a
-        maximum value of 255. Otherwise, it should have mode ``1``.
+        maximum value of 255. If the font has embedded color data, the bitmap
+        should have mode ``RGBA``. Otherwise, it should have mode ``1``.
 
         :param text: Text to render.
         :param mode: Used by some graphics drivers to indicate what mode the
@@ -554,6 +556,10 @@ class FreeTypeFont:
 
                          .. versionadded:: 8.0.0
 
+        :param ink: Foreground ink for rendering in RGBA mode.
+
+                         .. versionadded:: 8.0.0
+
         :return: An internal PIL storage memory instance as defined by the
                  :py:mod:`PIL.Image.core` interface module.
         """
@@ -565,6 +571,7 @@ class FreeTypeFont:
             language=language,
             stroke_width=stroke_width,
             anchor=anchor,
+            ink=ink,
         )[0]
 
     def getmask2(
@@ -577,6 +584,7 @@ class FreeTypeFont:
         language=None,
         stroke_width=0,
         anchor=None,
+        ink=0,
         *args,
         **kwargs,
     ):
@@ -584,7 +592,8 @@ class FreeTypeFont:
         Create a bitmap for the text.
 
         If the font uses antialiasing, the bitmap should have mode ``L`` and use a
-        maximum value of 255. Otherwise, it should have mode ``1``.
+        maximum value of 255. If the font has embedded color data, the bitmap
+        should have mode ``RGBA``. Otherwise, it should have mode ``1``.
 
         :param text: Text to render.
         :param mode: Used by some graphics drivers to indicate what mode the
@@ -633,18 +642,22 @@ class FreeTypeFont:
 
                          .. versionadded:: 8.0.0
 
+        :param ink: Foreground ink for rendering in RGBA mode.
+
+                         .. versionadded:: 8.0.0
+
         :return: A tuple of an internal PIL storage memory instance as defined by the
                  :py:mod:`PIL.Image.core` interface module, and the text offset, the
                  gap between the starting coordinate and the first marking
         """
         size, offset = self.font.getsize(
-            text, mode == "1", direction, features, language, anchor
+            text, mode, direction, features, language, anchor
         )
         size = size[0] + stroke_width * 2, size[1] + stroke_width * 2
         offset = offset[0] - stroke_width, offset[1] - stroke_width
-        im = fill("L", size, 0)
+        im = fill("RGBA" if mode == "RGBA" else "L", size, 0)
         self.font.render(
-            text, im.id, mode == "1", direction, features, language, stroke_width
+            text, im.id, mode, direction, features, language, stroke_width, ink
         )
         return im, offset
 

src/PIL/JpegImagePlugin.py

@@ -475,13 +475,6 @@ class JpegImageFile(ImageFile.ImageFile):
         return _getmp(self)
 
 
-def _fixup_dict(src_dict):
-    # Helper function for _getexif()
-    # returns a dict with any single item tuples/lists as individual values
-    exif = Image.Exif()
-    return exif._fixup_dict(src_dict)
-
-
 def _getexif(self):
     if "exif" not in self.info:
         return None

src/_imaging.c

@@ -518,6 +518,9 @@ getink(PyObject* color, Imaging im, char* ink)
        be cast to either UINT8 or INT32 */
 
     int rIsInt = 0;
+    if (PyTuple_Check(color) && PyTuple_Size(color) == 1) {
+        color = PyTuple_GetItem(color, 0);
+    }
     if (im->type == IMAGING_TYPE_UINT8 ||
         im->type == IMAGING_TYPE_INT32 ||
         im->type == IMAGING_TYPE_SPECIAL) {
@@ -533,7 +536,7 @@ getink(PyObject* color, Imaging im, char* ink)
                 return NULL;
             }
         } else {
-            PyErr_SetString(PyExc_TypeError, "color must be int");
+            PyErr_SetString(PyExc_TypeError, "color must be int or single-element tuple");
             return NULL;
         }
     }
@@ -2836,8 +2839,7 @@ _draw_arc(ImagingDrawObject* self, PyObject* args)
     int ink;
     int width = 0;
     float start, end;
-    int op = 0;
-    if (!PyArg_ParseTuple(args, "Offi|ii", &data, &start, &end, &ink, &width)) {
+    if (!PyArg_ParseTuple(args, "Offi|i", &data, &start, &end, &ink, &width)) {
         return NULL;
     }
 
@@ -2854,7 +2856,7 @@ _draw_arc(ImagingDrawObject* self, PyObject* args)
     n = ImagingDrawArc(self->image->image,
                        (int) xy[0], (int) xy[1],
                        (int) xy[2], (int) xy[3],
-                       start, end, &ink, width, op
+                       start, end, &ink, width, self->blend
                        );
 
     free(xy);

src/_imagingft.c

@@ -25,9 +25,13 @@
 #include <ft2build.h>
 #include FT_FREETYPE_H
 #include FT_GLYPH_H
+#include FT_BITMAP_H
 #include FT_STROKER_H
 #include FT_MULTIPLE_MASTERS_H
 #include FT_SFNT_NAMES_H
+#ifdef FT_COLOR_H
+#include FT_COLOR_H
+#endif
 
 #define KEEP_PY_UNICODE
 
@@ -350,7 +354,7 @@ font_getchar(PyObject* string, int index, FT_ULong* char_out)
 
 static size_t
 text_layout_raqm(PyObject* string, FontObject* self, const char* dir, PyObject *features,
-                 const char* lang, GlyphInfo **glyph_info, int mask)
+                 const char* lang, GlyphInfo **glyph_info, int mask, int color)
 {
     size_t i = 0, count = 0, start = 0;
     raqm_t *rq;
@@ -529,7 +533,7 @@ failed:
 
 static size_t
 text_layout_fallback(PyObject* string, FontObject* self, const char* dir, PyObject *features,
-                     const char* lang, GlyphInfo **glyph_info, int mask)
+                     const char* lang, GlyphInfo **glyph_info, int mask, int color)
 {
     int error, load_flags;
     FT_ULong ch;
@@ -561,10 +565,15 @@ text_layout_fallback(PyObject* string, FontObject* self, const char* dir, PyObje
         return 0;
     }
 
-    load_flags = FT_LOAD_NO_BITMAP;
+    load_flags = FT_LOAD_DEFAULT;
     if (mask) {
         load_flags |= FT_LOAD_TARGET_MONO;
     }
+#ifdef FT_LOAD_COLOR
+    if (color) {
+        load_flags |= FT_LOAD_COLOR;
+    }
+#endif
     for (i = 0; font_getchar(string, i, &ch); i++) {
         (*glyph_info)[i].index = FT_Get_Char_Index(self->face, ch);
         error = FT_Load_Glyph(self->face, (*glyph_info)[i].index, load_flags);
@@ -595,14 +604,14 @@ text_layout_fallback(PyObject* string, FontObject* self, const char* dir, PyObje
 
 static size_t
 text_layout(PyObject* string, FontObject* self, const char* dir, PyObject *features,
-            const char* lang, GlyphInfo **glyph_info, int mask)
+            const char* lang, GlyphInfo **glyph_info, int mask, int color)
 {
     size_t count;
 
     if (p_raqm.raqm && self->layout_engine == LAYOUT_RAQM) {
-        count = text_layout_raqm(string, self, dir, features, lang, glyph_info,  mask);
+        count = text_layout_raqm(string, self, dir, features, lang, glyph_info,  mask, color);
     } else {
-        count = text_layout_fallback(string, self, dir, features, lang, glyph_info, mask);
+        count = text_layout_fallback(string, self, dir, features, lang, glyph_info, mask, color);
     }
     return count;
 }
@@ -667,6 +676,8 @@ font_getsize(FontObject* self, PyObject* args)
     size_t i, count; /* glyph_info index and length */
     int horizontal_dir; /* is primary axis horizontal? */
     int mask = 0; /* is FT_LOAD_TARGET_MONO enabled? */
+    int color = 0; /* is FT_LOAD_COLOR enabled? */
+    const char *mode = NULL;
     const char *dir = NULL;
     const char *lang = NULL;
     const char *anchor = NULL;
@@ -675,12 +686,15 @@ font_getsize(FontObject* self, PyObject* args)
 
     /* calculate size and bearing for a given string */
 
-    if (!PyArg_ParseTuple(args, "O|izOzz:getsize", &string, &mask, &dir, &features, &lang, &anchor)) {
+    if (!PyArg_ParseTuple(args, "O|zzOzz:getsize", &string, &mode, &dir, &features, &lang, &anchor)) {
         return NULL;
     }
 
     horizontal_dir = dir && strcmp(dir, "ttb") == 0 ? 0 : 1;
 
+    mask = mode && strcmp(mode, "1") == 0;
+    color = mode && strcmp(mode, "RGBA") == 0;
+
     if (anchor == NULL) {
         anchor = horizontal_dir ? "la" : "lt";
     }
@@ -688,18 +702,20 @@ font_getsize(FontObject* self, PyObject* args)
         goto bad_anchor;
     }
 
-    count = text_layout(string, self, dir, features, lang, &glyph_info, mask);
+    count = text_layout(string, self, dir, features, lang, &glyph_info, mask, color);
     if (PyErr_Occurred()) {
         return NULL;
     }
 
-    /* Note: bitmap fonts within ttf fonts do not work, see #891/pr#960
-     *   Yifu Yu<root@jackyyf.com>, 2014-10-15
-     */
-    load_flags = FT_LOAD_NO_BITMAP;
+    load_flags = FT_LOAD_DEFAULT;
     if (mask) {
         load_flags |= FT_LOAD_TARGET_MONO;
     }
+#ifdef FT_LOAD_COLOR
+    if (color) {
+        load_flags |= FT_LOAD_COLOR;
+    }
+#endif
 
     /*
      * text bounds are given by:
@@ -865,19 +881,26 @@ font_render(FontObject* self, PyObject* args)
     FT_Glyph glyph;
     FT_GlyphSlot glyph_slot;
     FT_Bitmap bitmap;
+    FT_Bitmap bitmap_converted; /* initialized lazily, for non-8bpp fonts */
     FT_BitmapGlyph bitmap_glyph;
     FT_Stroker stroker = NULL;
+    int bitmap_converted_ready = 0; /* has bitmap_converted been initialized */
     GlyphInfo *glyph_info = NULL; /* computed text layout */
     size_t i, count; /* glyph_info index and length */
     int xx, yy; /* pixel offset of current glyph bitmap */
     int x0, x1; /* horizontal bounds of glyph bitmap to copy */
     unsigned int bitmap_y; /* glyph bitmap y index */
     unsigned char *source; /* glyph bitmap source buffer */
+    unsigned char convert_scale; /* scale factor for non-8bpp bitmaps */
     Imaging im;
     Py_ssize_t id;
     int horizontal_dir; /* is primary axis horizontal? */
     int mask = 0; /* is FT_LOAD_TARGET_MONO enabled? */
+    int color = 0; /* is FT_LOAD_COLOR enabled? */
     int stroke_width = 0;
+    PY_LONG_LONG foreground_ink_long = 0;
+    unsigned int foreground_ink;
+    const char *mode = NULL;
     const char *dir = NULL;
     const char *lang = NULL;
     PyObject *features = Py_None;
@@ -886,14 +909,31 @@ font_render(FontObject* self, PyObject* args)
     /* render string into given buffer (the buffer *must* have
        the right size, or this will crash) */
 
-    if (!PyArg_ParseTuple(args, "On|izOzi:render", &string,  &id, &mask, &dir, &features, &lang,
-                                                   &stroke_width)) {
+    if (!PyArg_ParseTuple(args, "On|zzOziL:render", &string,  &id, &mode, &dir, &features, &lang,
+                                                   &stroke_width, &foreground_ink_long)) {
         return NULL;
     }
 
     horizontal_dir = dir && strcmp(dir, "ttb") == 0 ? 0 : 1;
 
-    count = text_layout(string, self, dir, features, lang, &glyph_info, mask);
+    mask = mode && strcmp(mode, "1") == 0;
+    color = mode && strcmp(mode, "RGBA") == 0;
+
+    foreground_ink = foreground_ink_long;
+
+#ifdef FT_COLOR_H
+    if (color) {
+        FT_Color foreground_color;
+        FT_Byte* ink = (FT_Byte*)&foreground_ink;
+        foreground_color.red = ink[0];
+        foreground_color.green = ink[1];
+        foreground_color.blue = ink[2];
+        foreground_color.alpha = (FT_Byte) 255; /* ink alpha is handled in ImageDraw.text */
+        FT_Palette_Set_Foreground_Color(self->face, foreground_color);
+    }
+#endif
+
+    count = text_layout(string, self, dir, features, lang, &glyph_info, mask, color);
     if (PyErr_Occurred()) {
         return NULL;
     }
@@ -911,12 +951,15 @@ font_render(FontObject* self, PyObject* args)
     }
 
     im = (Imaging) id;
-
-    /* Note: bitmap fonts within ttf fonts do not work, see #891/pr#960 */
-    load_flags = FT_LOAD_NO_BITMAP;
+    load_flags = FT_LOAD_DEFAULT;
     if (mask) {
         load_flags |= FT_LOAD_TARGET_MONO;
     }
+#ifdef FT_LOAD_COLOR
+    if (color) {
+        load_flags |= FT_LOAD_COLOR;
+    }
+#endif
 
     /*
      * calculate x_min and y_max
@@ -988,6 +1031,55 @@ font_render(FontObject* self, PyObject* args)
             yy = -(py + glyph_slot->bitmap_top);
         }
 
+        /* convert non-8bpp bitmaps */
+        switch (bitmap.pixel_mode) {
+            case FT_PIXEL_MODE_MONO:
+                convert_scale = 255;
+                break;
+            case FT_PIXEL_MODE_GRAY2:
+                convert_scale = 255 / 3;
+                break;
+            case FT_PIXEL_MODE_GRAY4:
+                convert_scale = 255 / 15;
+                break;
+            default:
+                convert_scale = 1;
+        }
+        switch (bitmap.pixel_mode) {
+            case FT_PIXEL_MODE_MONO:
+            case FT_PIXEL_MODE_GRAY2:
+            case FT_PIXEL_MODE_GRAY4:
+                if (!bitmap_converted_ready) {
+
+#if FREETYPE_MAJOR > 2 ||\
+    (FREETYPE_MAJOR == 2 && FREETYPE_MINOR > 6)
+                    FT_Bitmap_Init(&bitmap_converted);
+#else
+                    FT_Bitmap_New(&bitmap_converted);
+#endif
+                    bitmap_converted_ready = 1;
+                }
+                error = FT_Bitmap_Convert(library, &bitmap, &bitmap_converted, 1);
+                if (error) {
+                    geterror(error);
+                    goto glyph_error;
+                }
+                bitmap = bitmap_converted;
+                /* bitmap is now FT_PIXEL_MODE_GRAY, fall through */
+            case FT_PIXEL_MODE_GRAY:
+                break;
+#ifdef FT_LOAD_COLOR
+            case FT_PIXEL_MODE_BGRA:
+                if (color) {
+                    break;
+                }
+                /* we didn't ask for color, fall through to default */
+#endif
+            default:
+                PyErr_SetString(PyExc_IOError, "unsupported bitmap pixel mode");
+                goto glyph_error;
+        }
+
         /* clip glyph bitmap width to target image bounds */
         x0 = 0;
         x1 = bitmap.width;
@@ -1002,29 +1094,55 @@ font_render(FontObject* self, PyObject* args)
         for (bitmap_y = 0; bitmap_y < bitmap.rows; bitmap_y++, yy++) {
             /* clip glyph bitmap height to target image bounds */
             if (yy >= 0 && yy < im->ysize) {
-                // blend this glyph into the buffer
-                unsigned char *target = im->image8[yy] + xx;
-                if (mask) {
-                    // use monochrome mask (on palette images, etc)
-                    int j, k, m = 128;
-                    for (j = k = 0; j < x1; j++) {
-                        if (j >= x0 && (source[k] & m)) {
-                            target[j] = 255;
+                /* blend this glyph into the buffer */
+                int k;
+                unsigned char v;
+                unsigned char* target;
+                if (color) {
+                    /* target[RGB] returns the color, target[A] returns the mask */
+                    /* target bands get split again in ImageDraw.text */
+                    target = im->image[yy] + xx * 4;
+                } else {
+                    target = im->image8[yy] + xx;
                 }
-                        if (!(m >>= 1)) {
-                            m = 128;
-                            k++;
+#ifdef FT_LOAD_COLOR
+                if (color && bitmap.pixel_mode == FT_PIXEL_MODE_BGRA) {
+                    /* paste color glyph */
+                    for (k = x0; k < x1; k++) {
+                        if (target[k * 4 + 3] < source[k * 4 + 3]) {
+                            /* unpremultiply BGRa to RGBA */
+                            target[k * 4 + 0] = CLIP8((255 * (int)source[k * 4 + 2]) / source[k * 4 + 3]);
+                            target[k * 4 + 1] = CLIP8((255 * (int)source[k * 4 + 1]) / source[k * 4 + 3]);
+                            target[k * 4 + 2] = CLIP8((255 * (int)source[k * 4 + 0]) / source[k * 4 + 3]);
+                            target[k * 4 + 3] = source[k * 4 + 3];
+                        }
+                    }
+                } else
+#endif
+                if (bitmap.pixel_mode == FT_PIXEL_MODE_GRAY) {
+                    if (color) {
+                        unsigned char* ink = (unsigned char*)&foreground_ink;
+                        for (k = x0; k < x1; k++) {
+                            v = source[k] * convert_scale;
+                            if (target[k * 4 + 3] < v) {
+                                target[k * 4 + 0] = ink[0];
+                                target[k * 4 + 1] = ink[1];
+                                target[k * 4 + 2] = ink[2];
+                                target[k * 4 + 3] = v;
                             }
                         }
                     } else {
-                    // use antialiased rendering
-                    int k;
                         for (k = x0; k < x1; k++) {
-                        if (target[k] < source[k]) {
-                            target[k] = source[k];
+                            v = source[k] * convert_scale;
+                            if (target[k] < v) {
+                                target[k] = v;
                             }
                         }
                     }
+                } else {
+                    PyErr_SetString(PyExc_IOError, "unsupported bitmap pixel mode");
+                    goto glyph_error;
+                }
             }
             source += bitmap.pitch;
         }
@@ -1035,9 +1153,23 @@ font_render(FontObject* self, PyObject* args)
         }
     }
 
+    if (bitmap_converted_ready) {
+        FT_Bitmap_Done(library, &bitmap_converted);
+    }
     FT_Stroker_Done(stroker);
     PyMem_Del(glyph_info);
     Py_RETURN_NONE;
+
+glyph_error:
+    if (stroker != NULL) {
+        FT_Done_Glyph(glyph);
+    }
+    if (bitmap_converted_ready) {
+        FT_Bitmap_Done(library, &bitmap_converted);
+    }
+    FT_Stroker_Done(stroker);
+    PyMem_Del(glyph_info);
+    return NULL;
 }
 
 #if FREETYPE_MAJOR > 2 ||\

src/libImaging/Draw.c

@@ -35,6 +35,7 @@
 #include "Imaging.h"
 
 #include <math.h>
+#include <stdint.h>
 
 #define CEIL(v)  (int) ceil(v)
 #define FLOOR(v) ((v) >= 0.0 ? (int) (v) : (int) floor(v))
@@ -818,221 +819,750 @@ ImagingDrawBitmap(Imaging im, int x0, int y0, Imaging bitmap, const void* ink,
 /* -------------------------------------------------------------------- */
 /* standard shapes */
 
-#define ARC 0
-#define CHORD 1
-#define PIESLICE 2
+// Imagine 2D plane and ellipse with center in (0, 0) and semi-major axes a and b.
+// Then quarter_* stuff approximates its top right quarter (x, y >= 0) with integer
+// points from set {(2x+x0, 2y+y0) | x,y in Z} where x0, y0 are from {0, 1} and
+// are such that point (a, b) is in the set.
 
-static void
-ellipsePoint(int cx, int cy, int w, int h,
-             float i, int *x, int *y)
-{
-    float i_cos, i_sin;
-    float x_f, y_f;
-    double modf_int;
-    i_cos = cos(i*M_PI/180);
-    i_sin = sin(i*M_PI/180);
-    x_f = (i_cos * w/2) + cx;
-    y_f = (i_sin * h/2) + cy;
-    if (modf(x_f, &modf_int) == 0.5) {
-        *x = i_cos > 0 ? FLOOR(x_f) : CEIL(x_f);
+typedef struct {
+    int32_t a, b, cx, cy, ex, ey;
+    int64_t a2, b2, a2b2;
+    int8_t finished;
+} quarter_state;
+
+void quarter_init(quarter_state* s, int32_t a, int32_t b) {
+    if (a < 0 || b < 0) {
+        s->finished = 1;
     } else {
-        *x = FLOOR(x_f + 0.5);
+        s->a = a;
+        s->b = b;
+        s->cx = a;
+        s->cy = b % 2;
+        s->ex = a % 2;
+        s->ey = b;
+        s->a2 = a * a;
+        s->b2 = b * b;
+        s->a2b2 = s->a2 * s->b2;
+        s->finished = 0;
     }
-    if (modf(y_f, &modf_int) == 0.5) {
-        *y = i_sin > 0 ? FLOOR(y_f) : CEIL(y_f);
+}
+
+// deviation of the point from ellipse curve, basically a substitution
+// of the point into the ellipse equation
+int64_t quarter_delta(quarter_state* s, int64_t x, int64_t y) {
+    return llabs(s->a2 * y * y + s->b2 * x * x - s->a2b2);
+}
+
+int8_t quarter_next(quarter_state* s, int32_t* ret_x, int32_t* ret_y) {
+    if (s->finished) {
+        return -1;
+    }
+    *ret_x = s->cx;
+    *ret_y = s->cy;
+    if (s->cx == s->ex && s->cy == s->ey) {
+        s->finished = 1;
     } else {
-        *y = FLOOR(y_f + 0.5);
+        // Bresenham's algorithm, possible optimization: only consider 2 of 3
+        // next points depending on current slope
+        int32_t nx = s->cx;
+        int32_t ny = s->cy + 2;
+        int64_t ndelta = quarter_delta(s, nx, ny);
+        if (nx > 1) {
+            int64_t newdelta = quarter_delta(s, s->cx - 2, s->cy + 2);
+            if (ndelta > newdelta) {
+                nx = s->cx - 2;
+                ny = s->cy + 2;
+                ndelta = newdelta;
+            }
+            newdelta = quarter_delta(s, s->cx - 2, s->cy);
+            if (ndelta > newdelta) {
+                nx = s->cx - 2;
+                ny = s->cy;
             }
         }
-
-static int
-ellipse(Imaging im, int x0, int y0, int x1, int y1,
-        float start, float end, const void* ink_, int fill,
-        int width, int mode, int op)
-{
-    float i;
-    int inner;
-    int n;
-    int maxEdgeCount;
-    int w, h;
-    int x, y;
-    int cx, cy;
-    int lx = 0, ly = 0;
-    int sx = 0, sy = 0;
-    int lx_inner = 0, ly_inner = 0;
-    int sx_inner = 0, sy_inner = 0;
-    DRAW* draw;
-    INT32 ink;
-    Edge* e;
-
-    DRAWINIT();
-
-    while (end < start) {
-        end += 360;
+        s->cx = nx;
+        s->cy = ny;
     }
-
-    if (end - start > 360) {
-        // no need to go in loops
-        end = start + 361;
-    }
-
-    w = x1 - x0;
-    h = y1 - y0;
-    if (w <= 0 || h <= 0) {
     return 0;
 }
 
-    cx = (x0 + x1) / 2;
-    cy = (y0 + y1) / 2;
+// quarter_* stuff can "draw" a quarter of an ellipse with thickness 1, great.
+// Now we use ellipse_* stuff to join all four quarters of two different sized
+// ellipses and receive horizontal segments of a complete ellipse with
+// specified thickness.
+//
+// Still using integer grid with step 2 at this point (like in quarter_*)
+// to ease angle clipping in future.
 
-    if (!fill && width <= 1) {
-        for (i = start; i < end+1; i++) {
-            if (i > end) {
-                i = end;
-            }
-            ellipsePoint(cx, cy, w, h, i, &x, &y);
-            if (i != start) {
-                draw->line(im, lx, ly, x, y, ink);
+typedef struct {
+    quarter_state st_o, st_i;
+    int32_t py, pl, pr;
+    int32_t cy[4], cl[4], cr[4];
+    int8_t bufcnt;
+    int8_t finished;
+    int8_t leftmost;
+} ellipse_state;
+
+void ellipse_init(ellipse_state* s, int32_t a, int32_t b, int32_t w) {
+    s->bufcnt = 0;
+    s->leftmost = a % 2;
+    quarter_init(&s->st_o, a, b);
+    if (w < 1 || quarter_next(&s->st_o, &s->pr, &s->py) == -1) {
+        s->finished = 1;
     } else {
-                sx = x, sy = y;
+        s->finished = 0;
+        quarter_init(&s->st_i, a - 2 * (w - 1), b - 2 * (w - 1));
+        s->pl = s->leftmost;
     }
-            lx = x, ly = y;
 }
 
-        if (i != start) {
-            if (mode == PIESLICE) {
-                if (x != cx || y != cy) {
-                    draw->line(im, x, y, cx, cy, ink);
-                    draw->line(im, cx, cy, sx, sy, ink);
-                }
-            } else if (mode == CHORD) {
-                if (x != sx || y != sy) {
-                    draw->line(im, x, y, sx, sy, ink);
-                }
+int8_t ellipse_next(ellipse_state* s, int32_t* ret_x0, int32_t* ret_y, int32_t* ret_x1) {
+    if (s->bufcnt == 0) {
+        if (s->finished) {
+            return -1;
         }
+        int32_t y = s->py;
+        int32_t l = s->pl;
+        int32_t r = s->pr;
+        int32_t cx = 0, cy = 0;
+        int8_t next_ret;
+        while ((next_ret = quarter_next(&s->st_o, &cx, &cy)) != -1 && cy <= y) {
         }
+        if (next_ret == -1) {
+            s->finished = 1;
         } else {
-        inner = (mode == ARC || !fill) ? 1 : 0;
-
-        // Build edge list
-        // malloc check UNDONE, FLOAT?
-        maxEdgeCount = ceil(end - start);
-        if (inner) {
-            maxEdgeCount *= 2;
+            s->pr = cx;
+            s->py = cy;
         }
-        maxEdgeCount += 3;
-        e = calloc(maxEdgeCount, sizeof(Edge));
-        if (!e) {
+        while ((next_ret = quarter_next(&s->st_i, &cx, &cy)) != -1 && cy <= y) {
+            l = cx;
+        }
+        s->pl = next_ret == -1 ? s->leftmost : cx;
+
+        if ((l > 0 || l < r) && y > 0) {
+            s->cl[s->bufcnt] = l == 0 ? 2 : l;
+            s->cy[s->bufcnt] = y;
+            s->cr[s->bufcnt] = r;
+            ++s->bufcnt;
+        }
+        if (y > 0) {
+            s->cl[s->bufcnt] = -r;
+            s->cy[s->bufcnt] = y;
+            s->cr[s->bufcnt] = -l;
+            ++s->bufcnt;
+        }
+        if (l > 0 || l < r) {
+            s->cl[s->bufcnt] = l == 0 ? 2 : l;
+            s->cy[s->bufcnt] = -y;
+            s->cr[s->bufcnt] = r;
+            ++s->bufcnt;
+        }
+        s->cl[s->bufcnt] = -r;
+        s->cy[s->bufcnt] = -y;
+        s->cr[s->bufcnt] = -l;
+        ++s->bufcnt;
+    }
+    --s->bufcnt;
+    *ret_x0 = s->cl[s->bufcnt];
+    *ret_y = s->cy[s->bufcnt];
+    *ret_x1 = s->cr[s->bufcnt];
+    return 0;
+}
+
+// Clipping tree consists of half-plane clipping nodes and combining nodes.
+// We can throw a horizontal segment in such a tree and collect an ordered set
+// of resulting disjoint clipped segments organized into a sorted linked list
+// of their end points.
+typedef enum {
+  CT_AND, // intersection
+  CT_OR, // union
+  CT_CLIP // half-plane clipping
+} clip_type;
+
+typedef struct clip_node {
+  clip_type type;
+  double a, b, c; // half-plane coeffs, only used in clipping nodes
+  struct clip_node* l; // child pointers, are only non-NULL in combining nodes
+  struct clip_node* r;
+} clip_node;
+
+// Linked list for the ends of the clipped horizontal segments.
+// Since the segment is always horizontal, we don't need to store Y coordinate.
+typedef struct event_list {
+  int32_t x;
+  int8_t type; // used internally, 1 for the left end (smaller X), -1 for the
+               // right end; pointless in output since the output segments
+               // are disjoint, therefore the types would always come in pairs
+               // and interchange (1 -1 1 -1 ...)
+  struct event_list* next;
+} event_list;
+
+// Mirrors all the clipping nodes of the tree relative to the y = x line.
+void clip_tree_transpose(clip_node* root) {
+  if (root != NULL) {
+    if (root->type == CT_CLIP) {
+      double t = root->a;
+      root->a = root->b;
+      root->b = t;
+    }
+    clip_tree_transpose(root->l);
+    clip_tree_transpose(root->r);
+  }
+}
+
+// Outputs a sequence of open-close events (types -1 and 1) for
+// non-intersecting segments sorted by X coordinate.
+// Combining nodes (AND, OR) may also accept sequences for intersecting
+// segments, i.e. something like correct bracket sequences.
+int clip_tree_do_clip(clip_node* root, int32_t x0, int32_t y, int32_t x1, event_list** ret) {
+  if (root == NULL) {
+    event_list* start = malloc(sizeof(event_list));
+    if (!start) {
       ImagingError_MemoryError();
       return -1;
     }
-
-        // Outer circle
-        n = 0;
-        for (i = start; i < end+1; i++) {
-            if (i > end) {
-                i = end;
+    event_list* end = malloc(sizeof(event_list));
+    if (!end) {
+      free(start);
+      ImagingError_MemoryError();
+      return -1;
+    }
+    start->x = x0;
+    start->type = 1;
+    start->next = end;
+    end->x = x1;
+    end->type = -1;
+    end->next = NULL;
+    *ret = start;
+    return 0;
+  }
+  if (root->type == CT_CLIP) {
+    double eps = 1e-9;
+    double A = root->a;
+    double B = root->b;
+    double C = root->c;
+    if (fabs(A) < eps) {
+      if (B * y + C < -eps) {
+        x0 = 1;
+        x1 = 0;
       }
-            ellipsePoint(cx, cy, w, h, i, &x, &y);
-            if (i == start) {
-                sx = x, sy = y;
     } else {
-                add_edge(&e[n++], lx, ly, x, y);
+      // X of intersection
+      double ix = - (B * y + C) / A;
+      if (A * x0 + B * y + C < eps) {
+        x0 = lround(fmax(x0, ix));
       }
-            lx = x, ly = y;
+      if (A * x1 + B * y + C < eps) {
+        x1 = lround(fmin(x1, ix));
       }
-        if (n == 0) {
+    }
+    if (x0 <= x1) {
+      event_list* start = malloc(sizeof(event_list));
+      if (!start) {
+        ImagingError_MemoryError();
+        return -1;
+      }
+      event_list* end = malloc(sizeof(event_list));
+      if (!end) {
+        free(start);
+        ImagingError_MemoryError();
+        return -1;
+      }
+      start->x = x0;
+      start->type = 1;
+      start->next = end;
+      end->x = x1;
+      end->type = -1;
+      end->next = NULL;
+      *ret = start;
+    } else {
+      *ret = NULL;
+    }
+    return 0;
+  }
+  if (root->type == CT_OR || root->type == CT_AND) {
+    event_list* l1;
+    event_list* l2;
+    if (clip_tree_do_clip(root->l, x0, y, x1, &l1) < 0) {
+      return -1;
+    }
+    if (clip_tree_do_clip(root->r, x0, y, x1, &l2) < 0) {
+      while (l1) {
+        l2 = l1->next;
+        free(l1);
+        l1 = l2;
+      }
+      return -1;
+    }
+    *ret = NULL;
+    event_list* tail = NULL;
+    int32_t k1 = 0;
+    int32_t k2 = 0;
+    while (l1 != NULL || l2 != NULL) {
+      event_list* t;
+      if (l2 == NULL || (l1 != NULL && (l1->x < l2->x || (l1->x == l2->x && l1->type > l2->type)))) {
+        t = l1;
+        k1 += t->type;
+        assert(k1 >= 0);
+        l1 = l1->next;
+      } else {
+        t = l2;
+        k2 += t->type;
+        assert(k2 >= 0);
+        l2 = l2->next;
+      }
+      t->next = NULL;
+      if ((root->type == CT_OR && (
+              (t->type == 1 && (tail == NULL || tail->type == -1)) ||
+              (t->type == -1 && k1 == 0 && k2 == 0)
+          )) || 
+          (root->type == CT_AND && (
+              (t->type == 1 && (tail == NULL || tail->type == -1) && k1 > 0 && k2 > 0) ||
+              (t->type == -1 && tail != NULL && tail->type == 1 && (k1 == 0 || k2 == 0))
+          ))) {
+        if (tail == NULL) {
+          *ret = t;
+        } else {
+          tail->next = t;
+        }
+        tail = t;
+      } else {
+        free(t);
+      }
+    }
+    return 0;
+  }
+  *ret = NULL;
   return 0;
 }
 
-        if (inner) {
-            // Inner circle
-            x0 += width - 1;
-            y0 += width - 1;
-            x1 -= width - 1;
-            y1 -= width - 1;
+// One more layer of processing on top of the regular ellipse.
+// Uses the clipping tree.
+// Used for producing ellipse derivatives such as arc, chord, pie, etc.
+typedef struct {
+  ellipse_state st;
+  clip_node* root;
+  clip_node nodes[7];
+  int32_t node_count;
+  event_list* head;
+  int32_t y;
+} clip_ellipse_state;
 
-            w = x1 - x0;
-            h = y1 - y0;
-            if (w <= 0 || h <= 0) {
-                // ARC with no gap in the middle is a PIESLICE
-                mode = PIESLICE;
-                inner = 0;
+typedef void (*clip_ellipse_init)(clip_ellipse_state*, int32_t, int32_t, int32_t, float, float);
+
+void debug_clip_tree(clip_node* root, int space) {
+  if (root == NULL) {
+    return;
+  }
+  if (root->type == CT_CLIP) {
+    int t = space;
+    while (t--) {
+      fputc(' ', stderr);
+    }
+    fprintf(stderr, "clip %+fx%+fy%+f > 0\n", root->a, root->b, root->c);
   } else {
-                for (i = start; i < end+1; i++) {
-                    if (i > end) {
-                        i = end;
+    debug_clip_tree(root->l, space + 2);
+    int t = space;
+    while (t--) {
+      fputc(' ', stderr);
     }
-                    ellipsePoint(cx, cy, w, h, i, &x, &y);
-                    if (i == start) {
-                        sx_inner = x, sy_inner = y;
+    fprintf(stderr, "%s\n", root->type == CT_AND ? "and" : "or");
+    debug_clip_tree(root->r, space + 2);
+  }
+  if (space == 0) {
+    fputc('\n', stderr);
+  }
+}
+
+// Resulting angles will satisfy 0 <= al < 360, al <= ar <= al + 360
+void normalize_angles(float* al, float* ar) {
+  if (*ar - *al >= 360) {
+    *al = 0;
+    *ar = 360;
   } else {
-                        add_edge(&e[n++], lx_inner, ly_inner, x, y);
+    *al = fmod(*al < 0 ? 360 - (fmod(-*al, 360)) : *al, 360);
+    *ar = *al + fmod(*ar < *al ? 360 - fmod(*al - *ar, 360) : *ar - *al, 360);
+  }
+}
+
+// An arc with caps orthogonal to the ellipse curve.
+void arc_init(clip_ellipse_state* s, int32_t a, int32_t b, int32_t w, float al, float ar) {
+  if (a < b) {
+    // transpose the coordinate system
+    arc_init(s, b, a, w, 90 - ar, 90 - al);
+    ellipse_init(&s->st, a, b, w);
+    clip_tree_transpose(s->root);
+  } else {
+    // a >= b, based on "wide" ellipse
+    ellipse_init(&s->st, a, b, w);
+
+    s->head = NULL;
+    s->node_count = 0;
+    normalize_angles(&al, &ar);
+
+    // building clipping tree, a lot of different cases
+    if (ar == al + 360) {
+      s->root = NULL;
+    } else {
+      clip_node* lc = s->nodes + s->node_count++;
+      clip_node* rc = s->nodes + s->node_count++;
+      lc->l = lc->r = rc->l = rc->r = NULL;
+      lc->type = rc->type = CT_CLIP;
+      lc->a = -a * sin(al * M_PI / 180.0);
+      lc->b = b * cos(al * M_PI / 180.0);
+      lc->c = (a * a - b * b) * sin(al * M_PI / 90.0) / 2.0;
+      rc->a = a * sin(ar * M_PI / 180.0);
+      rc->b = -b * cos(ar * M_PI / 180.0);
+      rc->c = (b * b - a * a) * sin(ar * M_PI / 90.0) / 2.0;
+      if (fmod(al, 180) == 0 || fmod(ar, 180) == 0) {
+        s->root = s->nodes + s->node_count++;
+        s->root->l = lc;
+        s->root->r = rc;
+        s->root->type = ar - al < 180 ? CT_AND : CT_OR;
+      } else if (((int)(al / 180) + (int)(ar / 180)) % 2 == 1) {
+        s->root = s->nodes + s->node_count++;
+        s->root->l = s->nodes + s->node_count++;
+        s->root->l->l = s->nodes + s->node_count++;
+        s->root->l->r = lc;
+        s->root->r = s->nodes + s->node_count++;
+        s->root->r->l = s->nodes + s->node_count++;
+        s->root->r->r = rc;
+        s->root->type = CT_OR;
+        s->root->l->type = CT_AND;
+        s->root->r->type = CT_AND;
+        s->root->l->l->type = CT_CLIP;
+        s->root->r->l->type = CT_CLIP;
+        s->root->l->l->l = s->root->l->l->r = NULL;
+        s->root->r->l->l = s->root->r->l->r = NULL;
+        s->root->l->l->a = s->root->l->l->c = 0;
+        s->root->r->l->a = s->root->r->l->c = 0;
+        s->root->l->l->b = (int)(al / 180) % 2 == 0 ? 1 : -1;
+        s->root->r->l->b = (int)(ar / 180) % 2 == 0 ? 1 : -1;
+      } else {
+        s->root = s->nodes + s->node_count++;
+        s->root->l = s->nodes + s->node_count++;
+        s->root->r = s->nodes + s->node_count++;
+        s->root->type = s->root->l->type = ar - al < 180 ? CT_AND : CT_OR;
+        s->root->l->l = lc;
+        s->root->l->r = rc;
+        s->root->r->type = CT_CLIP;
+        s->root->r->l = s->root->r->r = NULL;
+        s->root->r->a = s->root->r->c = 0;
+        s->root->r->b = ar < 180 || ar > 540 ? 1 : -1;
       }
-                    lx_inner = x, ly_inner = y;
     }
   }
 }
 
-        if (end - start < 360) {
-            // Close polygon
-            if (mode == PIESLICE) {
-                if (x != cx || y != cy) {
-                    add_edge(&e[n++], sx, sy, cx, cy);
-                    add_edge(&e[n++], cx, cy, lx, ly);
-                    if (inner) {
-                        ImagingDrawWideLine(im, sx, sy, cx, cy, &ink, width, op);
-                        ImagingDrawWideLine(im, cx, cy, lx, ly, &ink, width, op);
+// A chord line.
+void chord_line_init(clip_ellipse_state* s, int32_t a, int32_t b, int32_t w, float al, float ar) {
+  ellipse_init(&s->st, a, b, a + b + 1);
+
+  s->head = NULL;
+  s->node_count = 0;
+
+  // line equation for chord
+  double xl = a * cos(al * M_PI / 180.0), xr = a * cos(ar * M_PI / 180.0);
+  double yl = b * sin(al * M_PI / 180.0), yr = b * sin(ar * M_PI / 180.0);
+  s->root = s->nodes + s->node_count++;
+  s->root->l = s->nodes + s->node_count++;
+  s->root->r = s->nodes + s->node_count++;
+  s->root->type = CT_AND;
+  s->root->l->type = s->root->r->type = CT_CLIP;
+  s->root->l->l = s->root->l->r = s->root->r->l = s->root->r->r = NULL;
+  s->root->l->a = yr - yl;
+  s->root->l->b = xl - xr;
+  s->root->l->c = -(s->root->l->a * xl + s->root->l->b * yl);
+  s->root->r->a = -s->root->l->a;
+  s->root->r->b = -s->root->l->b;
+  s->root->r->c = 2 * w * sqrt(pow(s->root->l->a, 2.0) + pow(s->root->l->b, 2.0)) - s->root->l->c;
 }
+
+// Pie side.
+void pie_side_init(clip_ellipse_state* s, int32_t a, int32_t b, int32_t w, float al, float _) {
+  ellipse_init(&s->st, a, b, a + b + 1);
+
+  s->head = NULL;
+  s->node_count = 0;
+
+  double xl = a * cos(al * M_PI / 180.0);
+  double yl = b * sin(al * M_PI / 180.0);
+  double a1 = -yl;
+  double b1 = xl;
+  double c1 = w * sqrt(a1 * a1 + b1 * b1);
+
+  s->root = s->nodes + s->node_count++;
+  s->root->type = CT_AND;
+  s->root->l = s->nodes + s->node_count++;
+  s->root->l->type = CT_AND;
+
+  clip_node* cnode;
+  cnode = s->nodes + s->node_count++;
+  cnode->l = cnode->r = NULL;
+  cnode->type = CT_CLIP;
+  cnode->a = a1;
+  cnode->b = b1;
+  cnode->c = c1;
+  s->root->l->l = cnode;
+  cnode = s->nodes + s->node_count++;
+  cnode->l = cnode->r = NULL;
+  cnode->type = CT_CLIP;
+  cnode->a = -a1;
+  cnode->b = -b1;
+  cnode->c = c1;
+  s->root->l->r = cnode;
+  cnode = s->nodes + s->node_count++;
+  cnode->l = cnode->r = NULL;
+  cnode->type = CT_CLIP;
+  cnode->a = b1;
+  cnode->b = -a1;
+  cnode->c = 0;
+  s->root->r = cnode;
 }
-            } else if (mode == CHORD) {
-                add_edge(&e[n++], sx, sy, lx, ly);
-                if (inner) {
-                    add_edge(&e[n++], sx_inner, sy_inner, lx_inner, ly_inner);
+
+// A chord.
+void chord_init(clip_ellipse_state* s, int32_t a, int32_t b, int32_t w, float al, float ar) {
+  ellipse_init(&s->st, a, b, w);
+
+  s->head = NULL;
+  s->node_count = 0;
+
+  // line equation for chord
+  double xl = a * cos(al * M_PI / 180.0), xr = a * cos(ar * M_PI / 180.0);
+  double yl = b * sin(al * M_PI / 180.0), yr = b * sin(ar * M_PI / 180.0);
+  s->root = s->nodes + s->node_count++;
+  s->root->l = s->root->r = NULL;
+  s->root->type = CT_CLIP;
+  s->root->a = yr - yl;
+  s->root->b = xl - xr;
+  s->root->c = -(s->root->a * xl + s->root->b * yl);
 }
-            } else if (mode == ARC) {
-                add_edge(&e[n++], sx, sy, sx_inner, sy_inner);
-                add_edge(&e[n++], lx, ly, lx_inner, ly_inner);
+
+// A pie. Can also be used to draw an arc with ugly sharp caps.
+void pie_init(clip_ellipse_state* s, int32_t a, int32_t b, int32_t w, float al, float ar) {
+  ellipse_init(&s->st, a, b, w);
+
+  s->head = NULL;
+  s->node_count = 0;
+
+  // line equations for pie sides
+  double xl = a * cos(al * M_PI / 180.0), xr = a * cos(ar * M_PI / 180.0);
+  double yl = b * sin(al * M_PI / 180.0), yr = b * sin(ar * M_PI / 180.0);
+
+  clip_node* lc = s->nodes + s->node_count++;
+  clip_node* rc = s->nodes + s->node_count++;
+  lc->l = lc->r = rc->l = rc->r = NULL;
+  lc->type = rc->type = CT_CLIP;
+  lc->a = -yl;
+  lc->b = xl;
+  lc->c = 0;
+  rc->a = yr;
+  rc->b = -xr;
+  rc->c = 0;
+        
+  s->root = s->nodes + s->node_count++;
+  s->root->l = lc;
+  s->root->r = rc;
+  s->root->type = ar - al < 180 ? CT_AND : CT_OR;
+}
+
+void clip_ellipse_free(clip_ellipse_state* s) {
+  while (s->head != NULL) {
+    event_list* t = s->head;
+    s->head = s->head->next;
+    free(t);
   }
 }
 
-        draw->polygon(im, n, e, ink, 0);
-
-        free(e);
+int8_t clip_ellipse_next(clip_ellipse_state* s, int32_t* ret_x0, int32_t* ret_y, int32_t* ret_x1) {
+  int32_t x0, y, x1;
+  while (s->head == NULL && ellipse_next(&s->st, &x0, &y, &x1) >= 0) {
+    if (clip_tree_do_clip(s->root, x0, y, x1, &s->head) < 0) {
+      return -2;
     }
-
+    s->y = y;
+  }
+  if (s->head != NULL) {
+    *ret_y = s->y;
+    event_list* t = s->head;
+    s->head = s->head->next;
+    *ret_x0 = t->x;
+    free(t);
+    t = s->head;
+    assert(t != NULL);
+    s->head = s->head->next;
+    *ret_x1 = t->x;
+    free(t);
     return 0;
   }
-
-int
-ImagingDrawArc(Imaging im, int x0, int y0, int x1, int y1,
-               float start, float end, const void* ink, int width, int op)
-{
-    return ellipse(im, x0, y0, x1, y1, start, end, ink, 0, width, ARC, op);
+  return -1;
 }
 
-int
-ImagingDrawChord(Imaging im, int x0, int y0, int x1, int y1,
-                 float start, float end, const void* ink, int fill,
+static int
+ellipseNew(Imaging im, int x0, int y0, int x1, int y1,
+        const void* ink_, int fill,
         int width, int op)
 {
-    return ellipse(im, x0, y0, x1, y1, start, end, ink, fill, width, CHORD, op);
+    DRAW* draw;
+    INT32 ink;
+    DRAWINIT();
+
+    int a = x1 - x0;
+    int b = y1 - y0;
+    if (a < 0 || b < 0) {
+      return 0;
+    }
+    if (fill) {
+      width = a + b;
+    }
+
+    ellipse_state st;
+    ellipse_init(&st, a, b, width);
+    int32_t X0, Y, X1;
+    while (ellipse_next(&st, &X0, &Y, &X1) != -1) {
+      draw->hline(im, x0 + (X0 + a) / 2, y0 + (Y + b) / 2, x0 + (X1 + a) / 2, ink);
+    }
+    return 0;
+}
+
+static int
+clipEllipseNew(Imaging im, int x0, int y0, int x1, int y1,
+        float start, float end,
+        const void* ink_, int width, int op, clip_ellipse_init init)
+{
+    DRAW* draw;
+    INT32 ink;
+    DRAWINIT();
+
+    int a = x1 - x0;
+    int b = y1 - y0;
+    if (a < 0 || b < 0) {
+      return 0;
+    }
+
+    clip_ellipse_state st;
+    init(&st, a, b, width, start, end);
+    // debug_clip_tree(st.root, 0);
+    int32_t X0, Y, X1;
+    int next_code;
+    while ((next_code = clip_ellipse_next(&st, &X0, &Y, &X1)) >= 0) {
+      draw->hline(im, x0 + (X0 + a) / 2, y0 + (Y + b) / 2, x0 + (X1 + a) / 2, ink);
+    }
+    clip_ellipse_free(&st);
+    return next_code == -1 ? 0 : -1;
+}
+static int
+arcNew(Imaging im, int x0, int y0, int x1, int y1,
+        float start, float end,
+        const void* ink_, int width, int op)
+{
+  return clipEllipseNew(im, x0, y0, x1, y1, start, end, ink_, width, op, arc_init);
+}
+
+static int
+chordNew(Imaging im, int x0, int y0, int x1, int y1,
+        float start, float end,
+        const void* ink_, int width, int op)
+{
+  return clipEllipseNew(im, x0, y0, x1, y1, start, end, ink_, width, op, chord_init);
+}
+
+static int
+chordLineNew(Imaging im, int x0, int y0, int x1, int y1,
+        float start, float end,
+        const void* ink_, int width, int op)
+{
+  return clipEllipseNew(im, x0, y0, x1, y1, start, end, ink_, width, op, chord_line_init);
+}
+
+static int
+pieNew(Imaging im, int x0, int y0, int x1, int y1,
+        float start, float end,
+        const void* ink_, int width, int op)
+{
+  return clipEllipseNew(im, x0, y0, x1, y1, start, end, ink_, width, op, pie_init);
+}
+
+static int
+pieSideNew(Imaging im, int x0, int y0, int x1, int y1,
+        float start,
+        const void* ink_, int width, int op)
+{
+  return clipEllipseNew(im, x0, y0, x1, y1, start, 0, ink_, width, op, pie_side_init);
 }
 
 int
 ImagingDrawEllipse(Imaging im, int x0, int y0, int x1, int y1,
                    const void* ink, int fill, int width, int op)
 {
-    return ellipse(im, x0, y0, x1, y1, 0, 360, ink, fill, width, CHORD, op);
+    return ellipseNew(im, x0, y0, x1, y1, ink, fill, width, op);
 }
 
+int
+ImagingDrawArc(Imaging im, int x0, int y0, int x1, int y1,
+               float start, float end, const void* ink, int width, int op)
+{
+    normalize_angles(&start, &end);
+    if (start + 360 == end) {
+      return ImagingDrawEllipse(im, x0, y0, x1, y1, ink, 0, width, op);
+    }
+    if (start == end) {
+      return 0;
+    }
+    return arcNew(im, x0, y0, x1, y1, start, end, ink, width, op);
+}
+
+
+int
+ImagingDrawChord(Imaging im, int x0, int y0, int x1, int y1,
+                 float start, float end, const void* ink, int fill,
+                 int width, int op)
+{
+    normalize_angles(&start, &end);
+    if (start + 360 == end) {
+      return ImagingDrawEllipse(im, x0, y0, x1, y1, ink, fill, width, op);
+    }
+    if (start == end) {
+      return 0;
+    }
+    if (fill) {
+      return chordNew(im, x0, y0, x1, y1, start, end, ink, x1 - x0 + y1 - y0 + 1, op);
+    } else {
+      if (chordLineNew(im, x0, y0, x1, y1, start, end, ink, width, op)) {
+        return -1;
+      }
+      return chordNew(im, x0, y0, x1, y1, start, end, ink, width, op);
+    }
+}
+
+
 int
 ImagingDrawPieslice(Imaging im, int x0, int y0, int x1, int y1,
                     float start, float end, const void* ink, int fill,
                     int width, int op)
 {
-    return ellipse(im, x0, y0, x1, y1, start, end, ink, fill, width, PIESLICE, op);
+    normalize_angles(&start, &end);
+    if (start + 360 == end) {
+      return ellipseNew(im, x0, y0, x1, y1, ink, fill, width, op);
     }
+    if (start == end) {
+      return 0;
+    }
+    if (fill) {
+      return pieNew(im, x0, y0, x1, y1, start, end, ink, x1 + y1 - x0 - y0, op);
+    } else {
+      if (pieSideNew(im, x0, y0, x1, y1, start, ink, width, op)) {
+        return -1;
+      }
+      if (pieSideNew(im, x0, y0, x1, y1, end, ink, width, op)) {
+        return -1;
+      }
+      int xc = lround((x0 + x1 - width) / 2.0), yc = lround((y0 + y1 - width) / 2.0);
+      ellipseNew(im, xc, yc, xc + width - 1, yc + width - 1, ink, 1, 0, op);
+      return pieNew(im, x0, y0, x1, y1, start, end, ink, width, op);
+    }
+}
+
 
 /* -------------------------------------------------------------------- */
 

winbuild/build_prepare.py

@@ -169,6 +169,20 @@ deps = {
         ],
         "libs": [r"output\release-static\{architecture}\lib\*.lib"],
     },
+    "libpng": {
+        "url": SF_MIRROR + "/project/libpng/libpng16/1.6.37/lpng1637.zip",
+        "filename": "lpng1637.zip",
+        "dir": "lpng1637",
+        "build": [
+            # lint: do not inline
+            cmd_cmake(("-DPNG_SHARED:BOOL=OFF", "-DPNG_TESTS:BOOL=OFF")),
+            cmd_nmake(target="clean"),
+            cmd_nmake(),
+            cmd_copy("libpng16_static.lib", "libpng16.lib"),
+        ],
+        "headers": [r"png*.h"],
+        "libs": [r"libpng16.lib"],
+    },
     "freetype": {
         "url": "https://download.savannah.gnu.org/releases/freetype/freetype-2.10.2.tar.gz",  # noqa: E501
         "filename": "freetype-2.10.2.tar.gz",
@@ -181,8 +195,10 @@ deps = {
                 '<PropertyGroup Label="Globals">': '<PropertyGroup Label="Globals">\n    <WindowsTargetPlatformVersion>$(WindowsSDKVersion)</WindowsTargetPlatformVersion>',  # noqa: E501
             },
             r"builds\windows\vc2010\freetype.user.props": {
-                "<UserDefines></UserDefines>": "<UserDefines>FT_CONFIG_OPTION_USE_HARFBUZZ</UserDefines>",  # noqa: E501
-                "<UserIncludeDirectories></UserIncludeDirectories>": r"<UserIncludeDirectories>{dir_harfbuzz}\src</UserIncludeDirectories>",  # noqa: E501
+                "<UserDefines></UserDefines>": "<UserDefines>FT_CONFIG_OPTION_SYSTEM_ZLIB;FT_CONFIG_OPTION_USE_PNG;FT_CONFIG_OPTION_USE_HARFBUZZ</UserDefines>",  # noqa: E501
+                "<UserIncludeDirectories></UserIncludeDirectories>": r"<UserIncludeDirectories>{dir_harfbuzz}\src;{inc_dir}</UserIncludeDirectories>",  # noqa: E501
+                "<UserLibraryDirectories></UserLibraryDirectories>": "<UserLibraryDirectories>{lib_dir}</UserLibraryDirectories>",  # noqa: E501
+                "<UserDependencies></UserDependencies>": "<UserDependencies>zlib.lib;libpng16.lib</UserDependencies>",  # noqa: E501
             },
             r"src/autofit/afshaper.c": {
                 # link against harfbuzz.lib once it becomes available