mirror of
https://github.com/python-pillow/Pillow.git
synced 2025-01-14 03:21:44 +03:00
break up text_layout into two implementations
This commit is contained in:
Fahad Al-Saidi
wiredfool
parent
6dc4c7ea06
commit
629f83228a
308
_imagingft.c
308
_imagingft.c
|
|
@ -206,147 +206,9 @@ font_getchar(PyObject* string, int index, FT_ULong* char_out)
|
|||
}
|
||||
|
||||
static size_t
|
||||
text_layout(PyObject* string, FontObject* self, const char* dir,
|
||||
PyObject *features ,GlyphInfo **glyph_info, int mask);
|
||||
|
||||
static PyObject*
|
||||
font_getsize(FontObject* self, PyObject* args)
|
||||
{
|
||||
int i, x, y_max, y_min;
|
||||
FT_Face face;
|
||||
int xoffset, yoffset;
|
||||
const char *dir = NULL;
|
||||
size_t count;
|
||||
GlyphInfo *glyph_info = NULL;
|
||||
PyObject *features = Py_None;
|
||||
|
||||
/* calculate size and bearing for a given string */
|
||||
|
||||
PyObject* string;
|
||||
if (!PyArg_ParseTuple(args, "O|zO:getsize", &string, &dir, &features))
|
||||
return NULL;
|
||||
|
||||
face = NULL;
|
||||
xoffset = yoffset = 0;
|
||||
y_max = y_min = 0;
|
||||
|
||||
count = text_layout(string, self, dir, features, &glyph_info, 0);
|
||||
if (count == 0)
|
||||
return NULL;
|
||||
|
||||
for (x = i = 0; i < count; i++) {
|
||||
int index, error;
|
||||
FT_BBox bbox;
|
||||
FT_Glyph glyph;
|
||||
face = self->face;
|
||||
index = glyph_info[i].index;
|
||||
/* Note: bitmap fonts within ttf fonts do not work, see #891/pr#960
|
||||
* Yifu Yu<root@jackyyf.com>, 2014-10-15
|
||||
*/
|
||||
error = FT_Load_Glyph(face, index, FT_LOAD_DEFAULT|FT_LOAD_NO_BITMAP);
|
||||
if (error)
|
||||
return geterror(error);
|
||||
|
||||
if (i == 0 && face->glyph->metrics.horiBearingX < 0) {
|
||||
xoffset = face->glyph->metrics.horiBearingX;
|
||||
x -= xoffset;
|
||||
}
|
||||
|
||||
x += glyph_info[i].x_advance;
|
||||
|
||||
if (i == count - 1)
|
||||
{
|
||||
int offset;
|
||||
offset = glyph_info[i].x_advance -
|
||||
face->glyph->metrics.width -
|
||||
face->glyph->metrics.horiBearingX;
|
||||
if (offset < 0)
|
||||
x -= offset;
|
||||
}
|
||||
|
||||
FT_Get_Glyph(face->glyph, &glyph);
|
||||
FT_Glyph_Get_CBox(glyph, FT_GLYPH_BBOX_SUBPIXELS, &bbox);
|
||||
bbox.yMax -= glyph_info[i].y_offset;
|
||||
bbox.yMin -= glyph_info[i].y_offset;
|
||||
if (bbox.yMax > y_max)
|
||||
y_max = bbox.yMax;
|
||||
if (bbox.yMin < y_min)
|
||||
y_min = bbox.yMin;
|
||||
|
||||
/* find max distance of baseline from top */
|
||||
if (face->glyph->metrics.horiBearingY > yoffset)
|
||||
yoffset = face->glyph->metrics.horiBearingY;
|
||||
|
||||
//last_index = index;
|
||||
FT_Done_Glyph(glyph);
|
||||
}
|
||||
|
||||
if (face) {
|
||||
|
||||
/* left bearing */
|
||||
if (xoffset < 0)
|
||||
x -= xoffset;
|
||||
else
|
||||
xoffset = 0;
|
||||
/* difference between the font ascender and the distance of
|
||||
* the baseline from the top */
|
||||
yoffset = PIXEL(self->face->size->metrics.ascender - yoffset);
|
||||
}
|
||||
|
||||
return Py_BuildValue(
|
||||
"(ii)(ii)",
|
||||
PIXEL(x), PIXEL(y_max - y_min),
|
||||
PIXEL(xoffset), yoffset
|
||||
);
|
||||
}
|
||||
|
||||
static PyObject*
|
||||
font_getabc(FontObject* self, PyObject* args)
|
||||
{
|
||||
FT_ULong ch;
|
||||
FT_Face face;
|
||||
double a, b, c;
|
||||
|
||||
/* calculate ABC values for a given string */
|
||||
|
||||
PyObject* string;
|
||||
if (!PyArg_ParseTuple(args, "O:getabc", &string))
|
||||
return NULL;
|
||||
|
||||
#if PY_VERSION_HEX >= 0x03000000
|
||||
if (!PyUnicode_Check(string)) {
|
||||
#else
|
||||
if (!PyUnicode_Check(string) && !PyString_Check(string)) {
|
||||
#endif
|
||||
PyErr_SetString(PyExc_TypeError, "expected string");
|
||||
return NULL;
|
||||
}
|
||||
|
||||
if (font_getchar(string, 0, &ch)) {
|
||||
int index, error;
|
||||
face = self->face;
|
||||
index = FT_Get_Char_Index(face, ch);
|
||||
/* Note: bitmap fonts within ttf fonts do not work, see #891/pr#960 */
|
||||
error = FT_Load_Glyph(face, index, FT_LOAD_DEFAULT|FT_LOAD_NO_BITMAP);
|
||||
if (error)
|
||||
return geterror(error);
|
||||
a = face->glyph->metrics.horiBearingX / 64.0;
|
||||
b = face->glyph->metrics.width / 64.0;
|
||||
c = (face->glyph->metrics.horiAdvance -
|
||||
face->glyph->metrics.horiBearingX -
|
||||
face->glyph->metrics.width) / 64.0;
|
||||
} else
|
||||
a = b = c = 0.0;
|
||||
|
||||
return Py_BuildValue("ddd", a, b, c);
|
||||
}
|
||||
|
||||
|
||||
static size_t
|
||||
text_layout(PyObject* string, FontObject* self, const char* dir,
|
||||
text_layout_raqm(PyObject* string, FontObject* self, const char* dir,
|
||||
PyObject *features ,GlyphInfo **glyph_info, int mask)
|
||||
{
|
||||
#ifdef HAVE_RAQM
|
||||
int i = 0;
|
||||
raqm_t *rq;
|
||||
size_t count = 0;
|
||||
|
|
@ -479,8 +341,12 @@ text_layout(PyObject* string, FontObject* self, const char* dir,
|
|||
failed:
|
||||
raqm_destroy (rq);
|
||||
return count;
|
||||
}
|
||||
|
||||
#else
|
||||
static size_t
|
||||
text_layout_fallback(PyObject* string, FontObject* self, const char* dir,
|
||||
PyObject *features ,GlyphInfo **glyph_info, int mask)
|
||||
{
|
||||
int error, load_flags;
|
||||
FT_ULong ch;
|
||||
Py_ssize_t count;
|
||||
|
|
@ -489,9 +355,9 @@ failed:
|
|||
FT_UInt last_index = 0;
|
||||
int i;
|
||||
|
||||
if (features != Py_None || dir != NULL)
|
||||
if (features != Py_None || dir != NULL) {
|
||||
PyErr_SetString(PyExc_KeyError, "setting text direction or font features is not supported without libraqm");
|
||||
|
||||
}
|
||||
#if PY_VERSION_HEX >= 0x03000000
|
||||
if (!PyUnicode_Check(string)) {
|
||||
#else
|
||||
|
|
@ -502,10 +368,12 @@ failed:
|
|||
}
|
||||
|
||||
count = 0;
|
||||
while (font_getchar(string, count, &ch))
|
||||
while (font_getchar(string, count, &ch)) {
|
||||
count++;
|
||||
if (count == 0)
|
||||
}
|
||||
if (count == 0) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
(*glyph_info) = PyMem_New(GlyphInfo, count);
|
||||
if ((*glyph_info) == NULL) {
|
||||
|
|
@ -514,8 +382,9 @@ failed:
|
|||
}
|
||||
|
||||
load_flags = FT_LOAD_RENDER|FT_LOAD_NO_BITMAP;
|
||||
if (mask)
|
||||
if (mask) {
|
||||
load_flags |= FT_LOAD_TARGET_MONO;
|
||||
}
|
||||
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);
|
||||
|
|
@ -538,7 +407,150 @@ failed:
|
|||
(*glyph_info)[i].cluster = ch;
|
||||
}
|
||||
return count;
|
||||
}
|
||||
|
||||
static size_t
|
||||
text_layout(PyObject* string, FontObject* self, const char* dir,
|
||||
PyObject *features, GlyphInfo **glyph_info, int mask)
|
||||
{
|
||||
size_t count;
|
||||
#ifdef HAVE_RAQM
|
||||
count = text_layout_raqm(string, self, dir, features, glyph_info, mask);
|
||||
#else
|
||||
count = text_layout_fallback(string, self, dir, features, glyph_info, mask);
|
||||
#endif
|
||||
return count;
|
||||
}
|
||||
|
||||
static PyObject*
|
||||
font_getsize(FontObject* self, PyObject* args)
|
||||
{
|
||||
int i, x, y_max, y_min;
|
||||
FT_Face face;
|
||||
int xoffset, yoffset;
|
||||
const char *dir = NULL;
|
||||
size_t count;
|
||||
GlyphInfo *glyph_info = NULL;
|
||||
PyObject *features = Py_None;
|
||||
|
||||
/* calculate size and bearing for a given string */
|
||||
|
||||
PyObject* string;
|
||||
if (!PyArg_ParseTuple(args, "O|zO:getsize", &string, &dir, &features))
|
||||
return NULL;
|
||||
|
||||
face = NULL;
|
||||
xoffset = yoffset = 0;
|
||||
y_max = y_min = 0;
|
||||
|
||||
count = text_layout(string, self, dir, features, &glyph_info, 0);
|
||||
if (count == 0)
|
||||
return NULL;
|
||||
|
||||
for (x = i = 0; i < count; i++) {
|
||||
int index, error;
|
||||
FT_BBox bbox;
|
||||
FT_Glyph glyph;
|
||||
face = self->face;
|
||||
index = glyph_info[i].index;
|
||||
/* Note: bitmap fonts within ttf fonts do not work, see #891/pr#960
|
||||
* Yifu Yu<root@jackyyf.com>, 2014-10-15
|
||||
*/
|
||||
error = FT_Load_Glyph(face, index, FT_LOAD_DEFAULT|FT_LOAD_NO_BITMAP);
|
||||
if (error)
|
||||
return geterror(error);
|
||||
|
||||
if (i == 0 && face->glyph->metrics.horiBearingX < 0) {
|
||||
xoffset = face->glyph->metrics.horiBearingX;
|
||||
x -= xoffset;
|
||||
}
|
||||
|
||||
x += glyph_info[i].x_advance;
|
||||
|
||||
if (i == count - 1)
|
||||
{
|
||||
int offset;
|
||||
offset = glyph_info[i].x_advance -
|
||||
face->glyph->metrics.width -
|
||||
face->glyph->metrics.horiBearingX;
|
||||
if (offset < 0)
|
||||
x -= offset;
|
||||
}
|
||||
|
||||
FT_Get_Glyph(face->glyph, &glyph);
|
||||
FT_Glyph_Get_CBox(glyph, FT_GLYPH_BBOX_SUBPIXELS, &bbox);
|
||||
bbox.yMax -= glyph_info[i].y_offset;
|
||||
bbox.yMin -= glyph_info[i].y_offset;
|
||||
if (bbox.yMax > y_max)
|
||||
y_max = bbox.yMax;
|
||||
if (bbox.yMin < y_min)
|
||||
y_min = bbox.yMin;
|
||||
|
||||
/* find max distance of baseline from top */
|
||||
if (face->glyph->metrics.horiBearingY > yoffset)
|
||||
yoffset = face->glyph->metrics.horiBearingY;
|
||||
|
||||
FT_Done_Glyph(glyph);
|
||||
}
|
||||
|
||||
if (face) {
|
||||
|
||||
/* left bearing */
|
||||
if (xoffset < 0)
|
||||
x -= xoffset;
|
||||
else
|
||||
xoffset = 0;
|
||||
/* difference between the font ascender and the distance of
|
||||
* the baseline from the top */
|
||||
yoffset = PIXEL(self->face->size->metrics.ascender - yoffset);
|
||||
}
|
||||
|
||||
return Py_BuildValue(
|
||||
"(ii)(ii)",
|
||||
PIXEL(x), PIXEL(y_max - y_min),
|
||||
PIXEL(xoffset), yoffset
|
||||
);
|
||||
}
|
||||
|
||||
static PyObject*
|
||||
font_getabc(FontObject* self, PyObject* args)
|
||||
{
|
||||
FT_ULong ch;
|
||||
FT_Face face;
|
||||
double a, b, c;
|
||||
|
||||
/* calculate ABC values for a given string */
|
||||
|
||||
PyObject* string;
|
||||
if (!PyArg_ParseTuple(args, "O:getabc", &string))
|
||||
return NULL;
|
||||
|
||||
#if PY_VERSION_HEX >= 0x03000000
|
||||
if (!PyUnicode_Check(string)) {
|
||||
#else
|
||||
if (!PyUnicode_Check(string) && !PyString_Check(string)) {
|
||||
#endif
|
||||
PyErr_SetString(PyExc_TypeError, "expected string");
|
||||
return NULL;
|
||||
}
|
||||
|
||||
if (font_getchar(string, 0, &ch)) {
|
||||
int index, error;
|
||||
face = self->face;
|
||||
index = FT_Get_Char_Index(face, ch);
|
||||
/* Note: bitmap fonts within ttf fonts do not work, see #891/pr#960 */
|
||||
error = FT_Load_Glyph(face, index, FT_LOAD_DEFAULT|FT_LOAD_NO_BITMAP);
|
||||
if (error)
|
||||
return geterror(error);
|
||||
a = face->glyph->metrics.horiBearingX / 64.0;
|
||||
b = face->glyph->metrics.width / 64.0;
|
||||
c = (face->glyph->metrics.horiAdvance -
|
||||
face->glyph->metrics.horiBearingX -
|
||||
face->glyph->metrics.width) / 64.0;
|
||||
} else
|
||||
a = b = c = 0.0;
|
||||
|
||||
return Py_BuildValue("ddd", a, b, c);
|
||||
}
|
||||
|
||||
static PyObject*
|
||||
|
|
@ -562,13 +574,15 @@ font_render(FontObject* self, PyObject* args)
|
|||
GlyphInfo *glyph_info;
|
||||
PyObject *features = NULL;
|
||||
|
||||
if (!PyArg_ParseTuple(args, "On|izO:render", &string, &id, &mask, &dir, &features))
|
||||
if (!PyArg_ParseTuple(args, "On|izO:render", &string, &id, &mask, &dir, &features)) {
|
||||
return NULL;
|
||||
}
|
||||
|
||||
glyph_info = NULL;
|
||||
count = text_layout(string, self, dir, features, &glyph_info, mask);
|
||||
if (count == 0)
|
||||
if (count == 0) {
|
||||
return NULL;
|
||||
}
|
||||
|
||||
im = (Imaging) id;
|
||||
/* Note: bitmap fonts within ttf fonts do not work, see #891/pr#960 */
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user