From 389ad11693deb5ea39b8edf0eb47263582a3f5f0 Mon Sep 17 00:00:00 2001 From: Andrew Murray Date: Sat, 10 Jun 2023 17:10:42 +1000 Subject: [PATCH 1/2] Only call text_layout once in getmask2 --- src/PIL/ImageFont.py | 34 +++---- src/_imagingft.c | 215 ++++++++++++++++++++++++++----------------- 2 files changed, 144 insertions(+), 105 deletions(-) diff --git a/src/PIL/ImageFont.py b/src/PIL/ImageFont.py index ea4549cf5..7b4ca5814 100644 --- a/src/PIL/ImageFont.py +++ b/src/PIL/ImageFont.py @@ -26,7 +26,6 @@ # import base64 -import math import os import sys import warnings @@ -551,28 +550,23 @@ class FreeTypeFont: :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, direction, features, language, anchor - ) if start is None: start = (0, 0) - size = tuple(math.ceil(size[i] + stroke_width * 2 + start[i]) for i in range(2)) - offset = offset[0] - stroke_width, offset[1] - stroke_width + im, size, offset = self.font.render( + text, + Image.core.fill, + mode, + direction, + features, + language, + stroke_width, + anchor, + ink, + start[0], + start[1], + Image.MAX_IMAGE_PIXELS, + ) Image._decompression_bomb_check(size) - im = Image.core.fill("RGBA" if mode == "RGBA" else "L", size, 0) - if min(size): - self.font.render( - text, - im.id, - mode, - direction, - features, - language, - stroke_width, - ink, - start[0], - start[1], - ) return im, offset def font_variant( diff --git a/src/_imagingft.c b/src/_imagingft.c index 80f862bb7..95f12eb5a 100644 --- a/src/_imagingft.c +++ b/src/_imagingft.c @@ -551,73 +551,25 @@ font_getlength(FontObject *self, PyObject *args) { return PyLong_FromLong(length); } -static PyObject * -font_getsize(FontObject *self, PyObject *args) { +static int +bounding_box_and_anchors(FT_Face face, const char *anchor, int horizontal_dir, GlyphInfo *glyph_info, size_t count, int load_flags, int *width, int *height, int *x_offset, int *y_offset) { int position; /* pen position along primary axis, in 26.6 precision */ int advanced; /* pen position along primary axis, in pixels */ int px, py; /* position of current glyph, in pixels */ int x_min, x_max, y_min, y_max; /* text bounding box, in pixels */ int x_anchor, y_anchor; /* offset of point drawn at (0, 0), in pixels */ - int load_flags; /* FreeType load_flags parameter */ int error; - FT_Face face; FT_Glyph glyph; - FT_BBox bbox; /* glyph bounding box */ - GlyphInfo *glyph_info = NULL; /* computed text layout */ - 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; - PyObject *features = Py_None; - PyObject *string; - - /* calculate size and bearing for a given string */ - - 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"; - } - if (strlen(anchor) != 2) { - goto bad_anchor; - } - - count = text_layout(string, self, dir, features, lang, &glyph_info, mask, color); - if (PyErr_Occurred()) { - return NULL; - } - - load_flags = FT_LOAD_DEFAULT; - if (mask) { - load_flags |= FT_LOAD_TARGET_MONO; - } - if (color) { - load_flags |= FT_LOAD_COLOR; - } - + FT_BBox bbox; /* glyph bounding box */ + size_t i; /* glyph_info index */ /* * text bounds are given by: * - bounding boxes of individual glyphs * - pen line, i.e. 0 to `advanced` along primary axis * this means point (0, 0) is part of the text bounding box */ - face = NULL; position = x_min = x_max = y_min = y_max = 0; for (i = 0; i < count; i++) { - face = self->face; - if (horizontal_dir) { px = PIXEL(position + glyph_info[i].x_offset); py = PIXEL(glyph_info[i].y_offset); @@ -640,12 +592,14 @@ font_getsize(FontObject *self, PyObject *args) { error = FT_Load_Glyph(face, glyph_info[i].index, load_flags); if (error) { - return geterror(error); + geterror(error); + return 1; } error = FT_Get_Glyph(face->glyph, &glyph); if (error) { - return geterror(error); + geterror(error); + return 1; } FT_Glyph_Get_CBox(glyph, FT_GLYPH_BBOX_PIXELS, &bbox); @@ -669,13 +623,15 @@ font_getsize(FontObject *self, PyObject *args) { FT_Done_Glyph(glyph); } - if (glyph_info) { - PyMem_Free(glyph_info); - glyph_info = NULL; + if (anchor == NULL) { + anchor = horizontal_dir ? "la" : "lt"; + } + if (strlen(anchor) != 2) { + goto bad_anchor; } x_anchor = y_anchor = 0; - if (face) { + if (count) { if (horizontal_dir) { switch (anchor[0]) { case 'l': // left @@ -693,15 +649,15 @@ font_getsize(FontObject *self, PyObject *args) { } switch (anchor[1]) { case 'a': // ascender - y_anchor = PIXEL(self->face->size->metrics.ascender); + y_anchor = PIXEL(face->size->metrics.ascender); break; case 't': // top y_anchor = y_max; break; case 'm': // middle (ascender + descender) / 2 y_anchor = PIXEL( - (self->face->size->metrics.ascender + - self->face->size->metrics.descender) / + (face->size->metrics.ascender + + face->size->metrics.descender) / 2); break; case 's': // horizontal baseline @@ -711,7 +667,7 @@ font_getsize(FontObject *self, PyObject *args) { y_anchor = y_min; break; case 'd': // descender - y_anchor = PIXEL(self->face->size->metrics.descender); + y_anchor = PIXEL(face->size->metrics.descender); break; default: goto bad_anchor; @@ -751,17 +707,74 @@ font_getsize(FontObject *self, PyObject *args) { } } } - - return Py_BuildValue( - "(ii)(ii)", - (x_max - x_min), - (y_max - y_min), - (-x_anchor + x_min), - -(-y_anchor + y_max)); + *width = x_max - x_min; + *height = y_max - y_min; + *x_offset = -x_anchor + x_min; + *y_offset = -(-y_anchor + y_max); + return 0; bad_anchor: PyErr_Format(PyExc_ValueError, "bad anchor specified: %s", anchor); - return NULL; + return 1; +} + +static PyObject * +font_getsize(FontObject *self, PyObject *args) { + int width, height, x_offset, y_offset; + int load_flags; /* FreeType load_flags parameter */ + int error; + GlyphInfo *glyph_info = NULL; /* computed text layout */ + size_t count; /* glyph_info 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; + PyObject *features = Py_None; + PyObject *string; + + /* calculate size and bearing for a given string */ + + 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; + + count = text_layout(string, self, dir, features, lang, &glyph_info, mask, color); + if (PyErr_Occurred()) { + return NULL; + } + + load_flags = FT_LOAD_DEFAULT; + if (mask) { + load_flags |= FT_LOAD_TARGET_MONO; + } + if (color) { + load_flags |= FT_LOAD_COLOR; + } + + error = bounding_box_and_anchors(self->face, anchor, horizontal_dir, glyph_info, count, load_flags, &width, &height, &x_offset, &y_offset); + if (glyph_info) { + PyMem_Free(glyph_info); + glyph_info = NULL; + } + if (error) { + return NULL; + } + + return Py_BuildValue( + "(ii)(ii)", + width, + height, + x_offset, + y_offset); } static PyObject * @@ -785,6 +798,7 @@ font_render(FontObject *self, PyObject *args) { 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 */ + PyObject *image; Imaging im; Py_ssize_t id; int mask = 0; /* is FT_LOAD_TARGET_MONO enabled? */ @@ -795,27 +809,34 @@ font_render(FontObject *self, PyObject *args) { const char *mode = NULL; const char *dir = NULL; const char *lang = NULL; + const char *anchor = NULL; PyObject *features = Py_None; PyObject *string; + PyObject *fill; float x_start = 0; float y_start = 0; + int width, height, x_offset, y_offset; + int horizontal_dir; /* is primary axis horizontal? */ + PyObject *max_image_pixels = Py_None; /* render string into given buffer (the buffer *must* have the right size, or this will crash) */ if (!PyArg_ParseTuple( args, - "On|zzOziLff:render", + "OO|zzOzizLffO:render", &string, - &id, + &fill, &mode, &dir, &features, &lang, &stroke_width, + &anchor, &foreground_ink_long, &x_start, - &y_start)) { + &y_start, + &max_image_pixels)) { return NULL; } @@ -841,8 +862,41 @@ font_render(FontObject *self, PyObject *args) { if (PyErr_Occurred()) { return NULL; } - if (count == 0) { - Py_RETURN_NONE; + + load_flags = stroke_width ? FT_LOAD_NO_BITMAP : FT_LOAD_DEFAULT; + if (mask) { + load_flags |= FT_LOAD_TARGET_MONO; + } + if (color) { + load_flags |= FT_LOAD_COLOR; + } + + horizontal_dir = dir && strcmp(dir, "ttb") == 0 ? 0 : 1; + + error = bounding_box_and_anchors(self->face, anchor, horizontal_dir, glyph_info, count, load_flags, &width, &height, &x_offset, &y_offset); + if (error) { + PyMem_Del(glyph_info); + return NULL; + } + + width += stroke_width * 2 + ceil(x_start); + height += stroke_width * 2 + ceil(y_start); + if (max_image_pixels != Py_None) { + if (width * height > PyLong_AsLong(max_image_pixels) * 2) { + PyMem_Del(glyph_info); + return Py_BuildValue("O(ii)(ii)", Py_None, width, height, 0, 0); + } + } + + image = PyObject_CallFunction(fill, "s(ii)", strcmp(mode, "RGBA") == 0 ? "RGBA" : "L", width, height); + id = PyLong_AsSsize_t(PyObject_GetAttrString(image, "id")); + im = (Imaging)id; + + x_offset -= stroke_width; + y_offset -= stroke_width; + if (count == 0 || width == 0 || height == 0) { + PyMem_Del(glyph_info); + return Py_BuildValue("O(ii)(ii)", image, width, height, x_offset, y_offset); } if (stroke_width) { @@ -859,15 +913,6 @@ font_render(FontObject *self, PyObject *args) { 0); } - im = (Imaging)id; - load_flags = stroke_width ? FT_LOAD_NO_BITMAP : FT_LOAD_DEFAULT; - if (mask) { - load_flags |= FT_LOAD_TARGET_MONO; - } - if (color) { - load_flags |= FT_LOAD_COLOR; - } - /* * calculate x_min and y_max * must match font_getsize or there may be clipping! @@ -1064,7 +1109,7 @@ font_render(FontObject *self, PyObject *args) { } FT_Stroker_Done(stroker); PyMem_Del(glyph_info); - Py_RETURN_NONE; + return Py_BuildValue("O(ii)(ii)", image, width, height, x_offset, y_offset); glyph_error: if (stroker != NULL) { From 16d82c2dfd473836e7903165917584bf938b0345 Mon Sep 17 00:00:00 2001 From: Andrew Murray Date: Sat, 10 Jun 2023 19:37:54 +1000 Subject: [PATCH 2/2] Improved coverage --- Tests/test_imagefont.py | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Tests/test_imagefont.py b/Tests/test_imagefont.py index 7ea485a55..4a40d1d1d 100644 --- a/Tests/test_imagefont.py +++ b/Tests/test_imagefont.py @@ -463,6 +463,11 @@ def test_default_font(): assert_image_equal_tofile(im, "Tests/images/default_font.png") +@pytest.mark.parametrize("mode", (None, "1", "RGBA")) +def test_getbbox(font, mode): + assert (0, 4, 12, 16) == font.getbbox("A", mode) + + def test_getbbox_empty(font): # issue #2614, should not crash. assert (0, 0, 0, 0) == font.getbbox("")