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wine/dlls/dwrite/freetype.c
Nikolay Sivov c4917bdbdf dwrite: Use 8bpp bitmaps in grayscale mode. 
Problem analyzed by Kimmo Myllyvirta.

Signed-off-by: Nikolay Sivov <nsivov@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
2017-09-05 17:47:34 +02:00

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/*
* FreeType integration
*
* Copyright 2014-2017 Nikolay Sivov for CodeWeavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#define COBJMACROS
#include "config.h"
#include "wine/port.h"
#ifdef HAVE_FT2BUILD_H
#include <ft2build.h>
#include FT_CACHE_H
#include FT_FREETYPE_H
#include FT_OUTLINE_H
#include FT_TRUETYPE_TABLES_H
#endif /* HAVE_FT2BUILD_H */
#include "windef.h"
#include "wine/library.h"
#include "wine/debug.h"
#include "dwrite_private.h"
WINE_DEFAULT_DEBUG_CHANNEL(dwrite);
#ifdef HAVE_FREETYPE
static CRITICAL_SECTION freetype_cs;
static CRITICAL_SECTION_DEBUG critsect_debug =
{
0, 0, &freetype_cs,
{ &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
0, 0, { (DWORD_PTR)(__FILE__ ": freetype_cs") }
};
static CRITICAL_SECTION freetype_cs = { &critsect_debug, -1, 0, 0, 0, 0 };
static void *ft_handle = NULL;
static FT_Library library = 0;
static FTC_Manager cache_manager = 0;
static FTC_CMapCache cmap_cache = 0;
static FTC_ImageCache image_cache = 0;
typedef struct
{
FT_Int major;
FT_Int minor;
FT_Int patch;
} FT_Version_t;
#define MAKE_FUNCPTR(f) static typeof(f) * p##f = NULL
MAKE_FUNCPTR(FT_Done_FreeType);
MAKE_FUNCPTR(FT_Done_Glyph);
MAKE_FUNCPTR(FT_Get_First_Char);
MAKE_FUNCPTR(FT_Get_Kerning);
MAKE_FUNCPTR(FT_Get_Sfnt_Table);
MAKE_FUNCPTR(FT_Glyph_Copy);
MAKE_FUNCPTR(FT_Glyph_Get_CBox);
MAKE_FUNCPTR(FT_Glyph_Transform);
MAKE_FUNCPTR(FT_Init_FreeType);
MAKE_FUNCPTR(FT_Library_Version);
MAKE_FUNCPTR(FT_Load_Glyph);
MAKE_FUNCPTR(FT_Matrix_Multiply);
MAKE_FUNCPTR(FT_New_Memory_Face);
MAKE_FUNCPTR(FT_Outline_Copy);
MAKE_FUNCPTR(FT_Outline_Decompose);
MAKE_FUNCPTR(FT_Outline_Done);
MAKE_FUNCPTR(FT_Outline_Embolden);
MAKE_FUNCPTR(FT_Outline_Get_Bitmap);
MAKE_FUNCPTR(FT_Outline_New);
MAKE_FUNCPTR(FT_Outline_Transform);
MAKE_FUNCPTR(FT_Outline_Translate);
MAKE_FUNCPTR(FTC_CMapCache_Lookup);
MAKE_FUNCPTR(FTC_CMapCache_New);
MAKE_FUNCPTR(FTC_ImageCache_Lookup);
MAKE_FUNCPTR(FTC_ImageCache_New);
MAKE_FUNCPTR(FTC_Manager_New);
MAKE_FUNCPTR(FTC_Manager_Done);
MAKE_FUNCPTR(FTC_Manager_LookupFace);
MAKE_FUNCPTR(FTC_Manager_LookupSize);
MAKE_FUNCPTR(FTC_Manager_RemoveFaceID);
#undef MAKE_FUNCPTR
static FT_Error (*pFT_Outline_EmboldenXY)(FT_Outline *, FT_Pos, FT_Pos);
struct face_finalizer_data
{
IDWriteFontFileStream *stream;
void *context;
};
static void face_finalizer(void *object)
{
FT_Face face = object;
struct face_finalizer_data *data = (struct face_finalizer_data *)face->generic.data;
IDWriteFontFileStream_ReleaseFileFragment(data->stream, data->context);
IDWriteFontFileStream_Release(data->stream);
heap_free(data);
}
static FT_Error face_requester(FTC_FaceID face_id, FT_Library library, FT_Pointer request_data, FT_Face *face)
{
IDWriteFontFace *fontface = (IDWriteFontFace*)face_id;
IDWriteFontFileStream *stream;
IDWriteFontFile *file;
const void *data_ptr;
UINT32 index, count;
FT_Error fterror;
UINT64 data_size;
void *context;
HRESULT hr;
*face = NULL;
if (!fontface) {
WARN("NULL fontface requested.\n");
return FT_Err_Ok;
}
count = 1;
hr = IDWriteFontFace_GetFiles(fontface, &count, &file);
if (FAILED(hr))
return FT_Err_Ok;
hr = get_filestream_from_file(file, &stream);
IDWriteFontFile_Release(file);
if (FAILED(hr))
return FT_Err_Ok;
hr = IDWriteFontFileStream_GetFileSize(stream, &data_size);
if (FAILED(hr)) {
fterror = FT_Err_Invalid_Stream_Read;
goto fail;
}
hr = IDWriteFontFileStream_ReadFileFragment(stream, &data_ptr, 0, data_size, &context);
if (FAILED(hr)) {
fterror = FT_Err_Invalid_Stream_Read;
goto fail;
}
index = IDWriteFontFace_GetIndex(fontface);
fterror = pFT_New_Memory_Face(library, data_ptr, data_size, index, face);
if (fterror == FT_Err_Ok) {
struct face_finalizer_data *data;
data = heap_alloc(sizeof(*data));
data->stream = stream;
data->context = context;
(*face)->generic.data = data;
(*face)->generic.finalizer = face_finalizer;
return fterror;
}
else
IDWriteFontFileStream_ReleaseFileFragment(stream, context);
fail:
IDWriteFontFileStream_Release(stream);
return fterror;
}
BOOL init_freetype(void)
{
FT_Version_t FT_Version;
ft_handle = wine_dlopen(SONAME_LIBFREETYPE, RTLD_NOW, NULL, 0);
if (!ft_handle) {
WINE_MESSAGE("Wine cannot find the FreeType font library.\n");
return FALSE;
}
#define LOAD_FUNCPTR(f) if((p##f = wine_dlsym(ft_handle, #f, NULL, 0)) == NULL){WARN("Can't find symbol %s\n", #f); goto sym_not_found;}
LOAD_FUNCPTR(FT_Done_FreeType)
LOAD_FUNCPTR(FT_Done_Glyph)
LOAD_FUNCPTR(FT_Get_First_Char)
LOAD_FUNCPTR(FT_Get_Kerning)
LOAD_FUNCPTR(FT_Get_Sfnt_Table)
LOAD_FUNCPTR(FT_Glyph_Copy)
LOAD_FUNCPTR(FT_Glyph_Get_CBox)
LOAD_FUNCPTR(FT_Glyph_Transform)
LOAD_FUNCPTR(FT_Init_FreeType)
LOAD_FUNCPTR(FT_Library_Version)
LOAD_FUNCPTR(FT_Load_Glyph)
LOAD_FUNCPTR(FT_Matrix_Multiply)
LOAD_FUNCPTR(FT_New_Memory_Face)
LOAD_FUNCPTR(FT_Outline_Copy)
LOAD_FUNCPTR(FT_Outline_Decompose)
LOAD_FUNCPTR(FT_Outline_Done)
LOAD_FUNCPTR(FT_Outline_Embolden)
LOAD_FUNCPTR(FT_Outline_Get_Bitmap)
LOAD_FUNCPTR(FT_Outline_New)
LOAD_FUNCPTR(FT_Outline_Transform)
LOAD_FUNCPTR(FT_Outline_Translate)
LOAD_FUNCPTR(FTC_CMapCache_Lookup)
LOAD_FUNCPTR(FTC_CMapCache_New)
LOAD_FUNCPTR(FTC_ImageCache_Lookup)
LOAD_FUNCPTR(FTC_ImageCache_New)
LOAD_FUNCPTR(FTC_Manager_New)
LOAD_FUNCPTR(FTC_Manager_Done)
LOAD_FUNCPTR(FTC_Manager_LookupFace)
LOAD_FUNCPTR(FTC_Manager_LookupSize)
LOAD_FUNCPTR(FTC_Manager_RemoveFaceID)
#undef LOAD_FUNCPTR
pFT_Outline_EmboldenXY = wine_dlsym(ft_handle, "FT_Outline_EmboldenXY", NULL, 0);
if (pFT_Init_FreeType(&library) != 0) {
ERR("Can't init FreeType library\n");
wine_dlclose(ft_handle, NULL, 0);
ft_handle = NULL;
return FALSE;
}
pFT_Library_Version(library, &FT_Version.major, &FT_Version.minor, &FT_Version.patch);
/* init cache manager */
if (pFTC_Manager_New(library, 0, 0, 0, &face_requester, NULL, &cache_manager) != 0 ||
pFTC_CMapCache_New(cache_manager, &cmap_cache) != 0 ||
pFTC_ImageCache_New(cache_manager, &image_cache) != 0) {
ERR("Failed to init FreeType cache\n");
pFTC_Manager_Done(cache_manager);
pFT_Done_FreeType(library);
wine_dlclose(ft_handle, NULL, 0);
ft_handle = NULL;
return FALSE;
}
TRACE("FreeType version is %d.%d.%d\n", FT_Version.major, FT_Version.minor, FT_Version.patch);
return TRUE;
sym_not_found:
WINE_MESSAGE("Wine cannot find certain functions that it needs from FreeType library.\n");
wine_dlclose(ft_handle, NULL, 0);
ft_handle = NULL;
return FALSE;
}
void release_freetype(void)
{
pFTC_Manager_Done(cache_manager);
pFT_Done_FreeType(library);
}
void freetype_notify_cacheremove(IDWriteFontFace4 *fontface)
{
EnterCriticalSection(&freetype_cs);
pFTC_Manager_RemoveFaceID(cache_manager, fontface);
LeaveCriticalSection(&freetype_cs);
}
HRESULT freetype_get_design_glyph_metrics(IDWriteFontFace4 *fontface, UINT16 unitsperEm, UINT16 glyph, DWRITE_GLYPH_METRICS *ret)
{
FTC_ScalerRec scaler;
FT_Size size;
scaler.face_id = fontface;
scaler.width = unitsperEm;
scaler.height = unitsperEm;
scaler.pixel = 1;
scaler.x_res = 0;
scaler.y_res = 0;
EnterCriticalSection(&freetype_cs);
if (pFTC_Manager_LookupSize(cache_manager, &scaler, &size) == 0) {
if (pFT_Load_Glyph(size->face, glyph, FT_LOAD_NO_SCALE) == 0) {
USHORT simulations = IDWriteFontFace4_GetSimulations(fontface);
FT_Glyph_Metrics *metrics = &size->face->glyph->metrics;
ret->leftSideBearing = metrics->horiBearingX;
ret->advanceWidth = metrics->horiAdvance;
ret->rightSideBearing = metrics->horiAdvance - metrics->horiBearingX - metrics->width;
ret->topSideBearing = metrics->vertBearingY;
ret->advanceHeight = metrics->vertAdvance;
ret->bottomSideBearing = metrics->vertAdvance - metrics->vertBearingY - metrics->height;
ret->verticalOriginY = metrics->height + metrics->vertBearingY;
/* Adjust in case of bold simulation, glyphs without contours are ignored. */
if (simulations & DWRITE_FONT_SIMULATIONS_BOLD && size->face->glyph->format == FT_GLYPH_FORMAT_OUTLINE &&
size->face->glyph->outline.n_contours != 0) {
if (ret->advanceWidth)
ret->advanceWidth += (unitsperEm + 49) / 50;
}
}
}
LeaveCriticalSection(&freetype_cs);
return S_OK;
}
BOOL freetype_is_monospaced(IDWriteFontFace4 *fontface)
{
BOOL is_monospaced = FALSE;
FT_Face face;
EnterCriticalSection(&freetype_cs);
if (pFTC_Manager_LookupFace(cache_manager, fontface, &face) == 0)
is_monospaced = !!FT_IS_FIXED_WIDTH(face);
LeaveCriticalSection(&freetype_cs);
return is_monospaced;
}
struct decompose_context {
IDWriteGeometrySink *sink;
FLOAT xoffset;
FLOAT yoffset;
BOOL figure_started;
BOOL move_to; /* last call was 'move_to' */
FT_Vector origin; /* 'pen' position from last call */
};
static inline void ft_vector_to_d2d_point(const FT_Vector *v, FLOAT xoffset, FLOAT yoffset, D2D1_POINT_2F *p)
{
p->x = (v->x / 64.0f) + xoffset;
p->y = (v->y / 64.0f) + yoffset;
}
static void decompose_beginfigure(struct decompose_context *ctxt)
{
D2D1_POINT_2F point;
if (!ctxt->move_to)
return;
ft_vector_to_d2d_point(&ctxt->origin, ctxt->xoffset, ctxt->yoffset, &point);
ID2D1SimplifiedGeometrySink_BeginFigure(ctxt->sink, point, D2D1_FIGURE_BEGIN_FILLED);
ctxt->figure_started = TRUE;
ctxt->move_to = FALSE;
}
static int decompose_move_to(const FT_Vector *to, void *user)
{
struct decompose_context *ctxt = (struct decompose_context*)user;
if (ctxt->figure_started) {
ID2D1SimplifiedGeometrySink_EndFigure(ctxt->sink, D2D1_FIGURE_END_CLOSED);
ctxt->figure_started = FALSE;
}
ctxt->move_to = TRUE;
ctxt->origin = *to;
return 0;
}
static int decompose_line_to(const FT_Vector *to, void *user)
{
struct decompose_context *ctxt = (struct decompose_context*)user;
D2D1_POINT_2F point;
/* Special case for empty contours, in a way freetype returns them. */
if (ctxt->move_to && !memcmp(to, &ctxt->origin, sizeof(*to)))
return 0;
decompose_beginfigure(ctxt);
ft_vector_to_d2d_point(to, ctxt->xoffset, ctxt->yoffset, &point);
ID2D1SimplifiedGeometrySink_AddLines(ctxt->sink, &point, 1);
ctxt->origin = *to;
return 0;
}
static int decompose_conic_to(const FT_Vector *control, const FT_Vector *to, void *user)
{
struct decompose_context *ctxt = (struct decompose_context*)user;
D2D1_POINT_2F points[3];
FT_Vector cubic[3];
decompose_beginfigure(ctxt);
/* convert from quadratic to cubic */
/*
The parametric eqn for a cubic Bezier is, from PLRM:
r(t) = at^3 + bt^2 + ct + r0
with the control points:
r1 = r0 + c/3
r2 = r1 + (c + b)/3
r3 = r0 + c + b + a
A quadratic Bezier has the form:
p(t) = (1-t)^2 p0 + 2(1-t)t p1 + t^2 p2
So equating powers of t leads to:
r1 = 2/3 p1 + 1/3 p0
r2 = 2/3 p1 + 1/3 p2
and of course r0 = p0, r3 = p2
*/
/* r1 = 1/3 p0 + 2/3 p1
r2 = 1/3 p2 + 2/3 p1 */
cubic[0].x = (2 * control->x + 1) / 3;
cubic[0].y = (2 * control->y + 1) / 3;
cubic[1] = cubic[0];
cubic[0].x += (ctxt->origin.x + 1) / 3;
cubic[0].y += (ctxt->origin.y + 1) / 3;
cubic[1].x += (to->x + 1) / 3;
cubic[1].y += (to->y + 1) / 3;
cubic[2] = *to;
ft_vector_to_d2d_point(cubic, ctxt->xoffset, ctxt->yoffset, points);
ft_vector_to_d2d_point(cubic + 1, ctxt->xoffset, ctxt->yoffset, points + 1);
ft_vector_to_d2d_point(cubic + 2, ctxt->xoffset, ctxt->yoffset, points + 2);
ID2D1SimplifiedGeometrySink_AddBeziers(ctxt->sink, (D2D1_BEZIER_SEGMENT*)points, 1);
ctxt->origin = *to;
return 0;
}
static int decompose_cubic_to(const FT_Vector *control1, const FT_Vector *control2,
const FT_Vector *to, void *user)
{
struct decompose_context *ctxt = (struct decompose_context*)user;
D2D1_POINT_2F points[3];
decompose_beginfigure(ctxt);
ft_vector_to_d2d_point(control1, ctxt->xoffset, ctxt->yoffset, points);
ft_vector_to_d2d_point(control2, ctxt->xoffset, ctxt->yoffset, points + 1);
ft_vector_to_d2d_point(to, ctxt->xoffset, ctxt->yoffset, points + 2);
ID2D1SimplifiedGeometrySink_AddBeziers(ctxt->sink, (D2D1_BEZIER_SEGMENT*)points, 1);
ctxt->origin = *to;
return 0;
}
static void decompose_outline(FT_Outline *outline, FLOAT xoffset, FLOAT yoffset, IDWriteGeometrySink *sink)
{
static const FT_Outline_Funcs decompose_funcs = {
decompose_move_to,
decompose_line_to,
decompose_conic_to,
decompose_cubic_to,
0,
0
};
struct decompose_context context;
context.sink = sink;
context.xoffset = xoffset;
context.yoffset = yoffset;
context.figure_started = FALSE;
context.move_to = FALSE;
context.origin.x = 0;
context.origin.y = 0;
pFT_Outline_Decompose(outline, &decompose_funcs, &context);
if (context.figure_started)
ID2D1SimplifiedGeometrySink_EndFigure(sink, D2D1_FIGURE_END_CLOSED);
}
static void embolden_glyph_outline(FT_Outline *outline, FLOAT emsize)
{
FT_Pos strength;
strength = MulDiv(emsize, 1 << 6, 24);
if (pFT_Outline_EmboldenXY)
pFT_Outline_EmboldenXY(outline, strength, 0);
else
pFT_Outline_Embolden(outline, strength);
}
static void embolden_glyph(FT_Glyph glyph, FLOAT emsize)
{
FT_OutlineGlyph outline_glyph = (FT_OutlineGlyph)glyph;
if (glyph->format != FT_GLYPH_FORMAT_OUTLINE)
return;
embolden_glyph_outline(&outline_glyph->outline, emsize);
}
HRESULT freetype_get_glyphrun_outline(IDWriteFontFace4 *fontface, FLOAT emSize, UINT16 const *glyphs,
FLOAT const *advances, DWRITE_GLYPH_OFFSET const *offsets, UINT32 count, BOOL is_rtl, IDWriteGeometrySink *sink)
{
FTC_ScalerRec scaler;
USHORT simulations;
HRESULT hr = S_OK;
FT_Size size;
if (!count)
return S_OK;
ID2D1SimplifiedGeometrySink_SetFillMode(sink, D2D1_FILL_MODE_WINDING);
simulations = IDWriteFontFace4_GetSimulations(fontface);
scaler.face_id = fontface;
scaler.width = emSize;
scaler.height = emSize;
scaler.pixel = 1;
scaler.x_res = 0;
scaler.y_res = 0;
EnterCriticalSection(&freetype_cs);
if (pFTC_Manager_LookupSize(cache_manager, &scaler, &size) == 0) {
FLOAT advance = 0.0f;
UINT32 g;
for (g = 0; g < count; g++) {
if (pFT_Load_Glyph(size->face, glyphs[g], FT_LOAD_NO_BITMAP) == 0) {
FLOAT ft_advance = size->face->glyph->metrics.horiAdvance >> 6;
FT_Outline *outline = &size->face->glyph->outline;
FLOAT xoffset = 0.0f, yoffset = 0.0f;
FT_Matrix m;
if (simulations & DWRITE_FONT_SIMULATIONS_BOLD)
embolden_glyph_outline(outline, emSize);
m.xx = 1 << 16;
m.xy = simulations & DWRITE_FONT_SIMULATIONS_OBLIQUE ? (1 << 16) / 3 : 0;
m.yx = 0;
m.yy = -(1 << 16); /* flip Y axis */
pFT_Outline_Transform(outline, &m);
/* glyph offsets act as current glyph adjustment */
if (offsets) {
xoffset += is_rtl ? -offsets[g].advanceOffset : offsets[g].advanceOffset;
yoffset -= offsets[g].ascenderOffset;
}
if (g == 0 && is_rtl)
advance = advances ? -advances[g] : -ft_advance;
xoffset += advance;
decompose_outline(outline, xoffset, yoffset, sink);
/* update advance to next glyph */
if (advances)
advance += is_rtl ? -advances[g] : advances[g];
else
advance += is_rtl ? -ft_advance : ft_advance;
}
}
}
else
hr = E_FAIL;
LeaveCriticalSection(&freetype_cs);
return hr;
}
UINT16 freetype_get_glyphcount(IDWriteFontFace4 *fontface)
{
UINT16 count = 0;
FT_Face face;
EnterCriticalSection(&freetype_cs);
if (pFTC_Manager_LookupFace(cache_manager, fontface, &face) == 0)
count = face->num_glyphs;
LeaveCriticalSection(&freetype_cs);
return count;
}
void freetype_get_glyphs(IDWriteFontFace4 *fontface, INT charmap, UINT32 const *codepoints, UINT32 count,
UINT16 *glyphs)
{
UINT32 i;
EnterCriticalSection(&freetype_cs);
for (i = 0; i < count; i++) {
if (charmap == -1)
glyphs[i] = pFTC_CMapCache_Lookup(cmap_cache, fontface, charmap, codepoints[i]);
else {
UINT32 codepoint = codepoints[i];
/* special handling for symbol fonts */
if (codepoint < 0x100) codepoint += 0xf000;
glyphs[i] = pFTC_CMapCache_Lookup(cmap_cache, fontface, charmap, codepoint);
if (!glyphs[i])
glyphs[i] = pFTC_CMapCache_Lookup(cmap_cache, fontface, charmap, codepoint - 0xf000);
}
}
LeaveCriticalSection(&freetype_cs);
}
BOOL freetype_has_kerning_pairs(IDWriteFontFace4 *fontface)
{
BOOL has_kerning_pairs = FALSE;
FT_Face face;
EnterCriticalSection(&freetype_cs);
if (pFTC_Manager_LookupFace(cache_manager, fontface, &face) == 0)
has_kerning_pairs = !!FT_HAS_KERNING(face);
LeaveCriticalSection(&freetype_cs);
return has_kerning_pairs;
}
INT32 freetype_get_kerning_pair_adjustment(IDWriteFontFace4 *fontface, UINT16 left, UINT16 right)
{
INT32 adjustment = 0;
FT_Face face;
EnterCriticalSection(&freetype_cs);
if (pFTC_Manager_LookupFace(cache_manager, fontface, &face) == 0) {
FT_Vector kern;
if (FT_HAS_KERNING(face)) {
pFT_Get_Kerning(face, left, right, FT_KERNING_UNSCALED, &kern);
adjustment = kern.x;
}
}
LeaveCriticalSection(&freetype_cs);
return adjustment;
}
static inline void ft_matrix_from_dwrite_matrix(const DWRITE_MATRIX *m, FT_Matrix *ft_matrix)
{
ft_matrix->xx = m->m11 * 0x10000;
ft_matrix->xy = -m->m21 * 0x10000;
ft_matrix->yx = -m->m12 * 0x10000;
ft_matrix->yy = m->m22 * 0x10000;
}
/* Should be used only while holding 'freetype_cs' */
static BOOL is_face_scalable(IDWriteFontFace4 *fontface)
{
FT_Face face;
if (pFTC_Manager_LookupFace(cache_manager, fontface, &face) == 0)
return FT_IS_SCALABLE(face);
else
return FALSE;
}
static BOOL get_glyph_transform(struct dwrite_glyphbitmap *bitmap, FT_Matrix *ret)
{
FT_Matrix m;
ret->xx = 1 << 16;
ret->xy = 0;
ret->yx = 0;
ret->yy = 1 << 16;
/* Some fonts provide mostly bitmaps and very few outlines, for example for .notdef.
Disable transform if that's the case. */
if (!is_face_scalable(bitmap->fontface) || (!bitmap->m && bitmap->simulations == 0))
return FALSE;
if (bitmap->simulations & DWRITE_FONT_SIMULATIONS_OBLIQUE) {
m.xx = 1 << 16;
m.xy = (1 << 16) / 3;
m.yx = 0;
m.yy = 1 << 16;
pFT_Matrix_Multiply(&m, ret);
}
if (bitmap->m) {
ft_matrix_from_dwrite_matrix(bitmap->m, &m);
pFT_Matrix_Multiply(&m, ret);
}
return TRUE;
}
void freetype_get_glyph_bbox(struct dwrite_glyphbitmap *bitmap)
{
FTC_ImageTypeRec imagetype;
FT_BBox bbox = { 0 };
BOOL needs_transform;
FT_Glyph glyph;
FT_Matrix m;
EnterCriticalSection(&freetype_cs);
needs_transform = get_glyph_transform(bitmap, &m);
imagetype.face_id = bitmap->fontface;
imagetype.width = 0;
imagetype.height = bitmap->emsize;
imagetype.flags = needs_transform ? FT_LOAD_NO_BITMAP : FT_LOAD_DEFAULT;
if (pFTC_ImageCache_Lookup(image_cache, &imagetype, bitmap->index, &glyph, NULL) == 0) {
if (needs_transform) {
FT_Glyph glyph_copy;
if (pFT_Glyph_Copy(glyph, &glyph_copy) == 0) {
if (bitmap->simulations & DWRITE_FONT_SIMULATIONS_BOLD)
embolden_glyph(glyph_copy, bitmap->emsize);
/* Includes oblique and user transform. */
pFT_Glyph_Transform(glyph_copy, &m, NULL);
pFT_Glyph_Get_CBox(glyph_copy, FT_GLYPH_BBOX_PIXELS, &bbox);
pFT_Done_Glyph(glyph_copy);
}
}
else
pFT_Glyph_Get_CBox(glyph, FT_GLYPH_BBOX_PIXELS, &bbox);
}
LeaveCriticalSection(&freetype_cs);
/* flip Y axis */
SetRect(&bitmap->bbox, bbox.xMin, -bbox.yMax, bbox.xMax, -bbox.yMin);
}
void freetype_get_design_glyph_bbox(IDWriteFontFace4 *fontface, UINT16 unitsperEm, UINT16 glyph, RECT *bbox)
{
FTC_ScalerRec scaler;
FT_Size size;
scaler.face_id = fontface;
scaler.width = unitsperEm;
scaler.height = unitsperEm;
scaler.pixel = 1;
scaler.x_res = 0;
scaler.y_res = 0;
EnterCriticalSection(&freetype_cs);
if (pFTC_Manager_LookupSize(cache_manager, &scaler, &size) == 0) {
if (pFT_Load_Glyph(size->face, glyph, FT_LOAD_NO_SCALE) == 0) {
FT_Glyph_Metrics *metrics = &size->face->glyph->metrics;
bbox->left = metrics->horiBearingX;
bbox->right = bbox->left + metrics->horiAdvance;
bbox->top = -metrics->horiBearingY;
bbox->bottom = bbox->top + metrics->height;
}
}
LeaveCriticalSection(&freetype_cs);
}
static BOOL freetype_get_aliased_glyph_bitmap(struct dwrite_glyphbitmap *bitmap, FT_Glyph glyph)
{
const RECT *bbox = &bitmap->bbox;
int width = bbox->right - bbox->left;
int height = bbox->bottom - bbox->top;
if (glyph->format == FT_GLYPH_FORMAT_OUTLINE) {
FT_OutlineGlyph outline = (FT_OutlineGlyph)glyph;
const FT_Outline *src = &outline->outline;
FT_Bitmap ft_bitmap;
FT_Outline copy;
ft_bitmap.width = width;
ft_bitmap.rows = height;
ft_bitmap.pitch = bitmap->pitch;
ft_bitmap.pixel_mode = FT_PIXEL_MODE_MONO;
ft_bitmap.buffer = bitmap->buf;
/* Note: FreeType will only set 'black' bits for us. */
if (pFT_Outline_New(library, src->n_points, src->n_contours, &copy) == 0) {
pFT_Outline_Copy(src, &copy);
pFT_Outline_Translate(&copy, -bbox->left << 6, bbox->bottom << 6);
pFT_Outline_Get_Bitmap(library, &copy, &ft_bitmap);
pFT_Outline_Done(library, &copy);
}
}
else if (glyph->format == FT_GLYPH_FORMAT_BITMAP) {
FT_Bitmap *ft_bitmap = &((FT_BitmapGlyph)glyph)->bitmap;
BYTE *src = ft_bitmap->buffer, *dst = bitmap->buf;
int w = min(bitmap->pitch, (ft_bitmap->width + 7) >> 3);
int h = min(height, ft_bitmap->rows);
while (h--) {
memcpy(dst, src, w);
src += ft_bitmap->pitch;
dst += bitmap->pitch;
}
}
else
FIXME("format %x not handled\n", glyph->format);
return TRUE;
}
static BOOL freetype_get_aa_glyph_bitmap(struct dwrite_glyphbitmap *bitmap, FT_Glyph glyph)
{
const RECT *bbox = &bitmap->bbox;
int width = bbox->right - bbox->left;
int height = bbox->bottom - bbox->top;
BOOL ret = FALSE;
if (glyph->format == FT_GLYPH_FORMAT_OUTLINE) {
FT_OutlineGlyph outline = (FT_OutlineGlyph)glyph;
const FT_Outline *src = &outline->outline;
FT_Bitmap ft_bitmap;
FT_Outline copy;
ft_bitmap.width = width;
ft_bitmap.rows = height;
ft_bitmap.pitch = bitmap->pitch;
ft_bitmap.pixel_mode = FT_PIXEL_MODE_GRAY;
ft_bitmap.buffer = bitmap->buf;
/* Note: FreeType will only set 'black' bits for us. */
if (pFT_Outline_New(library, src->n_points, src->n_contours, &copy) == 0) {
pFT_Outline_Copy(src, &copy);
pFT_Outline_Translate(&copy, -bbox->left << 6, bbox->bottom << 6);
pFT_Outline_Get_Bitmap(library, &copy, &ft_bitmap);
pFT_Outline_Done(library, &copy);
}
}
else if (glyph->format == FT_GLYPH_FORMAT_BITMAP) {
FT_Bitmap *ft_bitmap = &((FT_BitmapGlyph)glyph)->bitmap;
BYTE *src = ft_bitmap->buffer, *dst = bitmap->buf;
int w = min(bitmap->pitch, (ft_bitmap->width + 7) >> 3);
int h = min(height, ft_bitmap->rows);
while (h--) {
memcpy(dst, src, w);
src += ft_bitmap->pitch;
dst += bitmap->pitch;
}
ret = TRUE;
}
else
FIXME("format %x not handled\n", glyph->format);
return ret;
}
BOOL freetype_get_glyph_bitmap(struct dwrite_glyphbitmap *bitmap)
{
FTC_ImageTypeRec imagetype;
BOOL needs_transform;
BOOL ret = FALSE;
FT_Glyph glyph;
FT_Matrix m;
EnterCriticalSection(&freetype_cs);
needs_transform = get_glyph_transform(bitmap, &m);
imagetype.face_id = bitmap->fontface;
imagetype.width = 0;
imagetype.height = bitmap->emsize;
imagetype.flags = needs_transform ? FT_LOAD_NO_BITMAP : FT_LOAD_DEFAULT;
if (pFTC_ImageCache_Lookup(image_cache, &imagetype, bitmap->index, &glyph, NULL) == 0) {
FT_Glyph glyph_copy;
if (needs_transform) {
if (pFT_Glyph_Copy(glyph, &glyph_copy) == 0) {
if (bitmap->simulations & DWRITE_FONT_SIMULATIONS_BOLD)
embolden_glyph(glyph_copy, bitmap->emsize);
/* Includes oblique and user transform. */
pFT_Glyph_Transform(glyph_copy, &m, NULL);
glyph = glyph_copy;
}
}
else
glyph_copy = NULL;
if (bitmap->aliased)
ret = freetype_get_aliased_glyph_bitmap(bitmap, glyph);
else
ret = freetype_get_aa_glyph_bitmap(bitmap, glyph);
if (glyph_copy)
pFT_Done_Glyph(glyph_copy);
}
LeaveCriticalSection(&freetype_cs);
return ret;
}
INT freetype_get_charmap_index(IDWriteFontFace4 *fontface, BOOL *is_symbol)
{
INT charmap_index = -1;
FT_Face face;
*is_symbol = FALSE;
EnterCriticalSection(&freetype_cs);
if (pFTC_Manager_LookupFace(cache_manager, fontface, &face) == 0) {
TT_OS2 *os2 = pFT_Get_Sfnt_Table(face, ft_sfnt_os2);
FT_Int i;
if (os2) {
FT_UInt dummy;
if (os2->version == 0)
*is_symbol = pFT_Get_First_Char(face, &dummy) >= 0x100;
else
*is_symbol = !!(os2->ulCodePageRange1 & FS_SYMBOL);
}
for (i = 0; i < face->num_charmaps; i++)
if (face->charmaps[i]->encoding == FT_ENCODING_MS_SYMBOL) {
*is_symbol = TRUE;
charmap_index = i;
break;
}
}
LeaveCriticalSection(&freetype_cs);
return charmap_index;
}
INT32 freetype_get_glyph_advance(IDWriteFontFace4 *fontface, FLOAT emSize, UINT16 index, DWRITE_MEASURING_MODE mode,
BOOL *has_contours)
{
FTC_ImageTypeRec imagetype;
FT_Glyph glyph;
INT32 advance;
imagetype.face_id = fontface;
imagetype.width = 0;
imagetype.height = emSize;
imagetype.flags = FT_LOAD_DEFAULT;
if (mode == DWRITE_MEASURING_MODE_NATURAL)
imagetype.flags |= FT_LOAD_NO_HINTING;
EnterCriticalSection(&freetype_cs);
if (pFTC_ImageCache_Lookup(image_cache, &imagetype, index, &glyph, NULL) == 0) {
*has_contours = glyph->format == FT_GLYPH_FORMAT_OUTLINE && ((FT_OutlineGlyph)glyph)->outline.n_contours;
advance = glyph->advance.x >> 16;
}
else {
*has_contours = FALSE;
advance = 0;
}
LeaveCriticalSection(&freetype_cs);
return advance;
}
#else /* HAVE_FREETYPE */
BOOL init_freetype(void)
{
return FALSE;
}
void release_freetype(void)
{
}
void freetype_notify_cacheremove(IDWriteFontFace4 *fontface)
{
}
HRESULT freetype_get_design_glyph_metrics(IDWriteFontFace4 *fontface, UINT16 unitsperEm, UINT16 glyph, DWRITE_GLYPH_METRICS *ret)
{
return E_NOTIMPL;
}
BOOL freetype_is_monospaced(IDWriteFontFace4 *fontface)
{
return FALSE;
}
HRESULT freetype_get_glyphrun_outline(IDWriteFontFace4 *fontface, FLOAT emSize, UINT16 const *glyphs, FLOAT const *advances,
DWRITE_GLYPH_OFFSET const *offsets, UINT32 count, BOOL is_rtl, IDWriteGeometrySink *sink)
{
return E_NOTIMPL;
}
UINT16 freetype_get_glyphcount(IDWriteFontFace4 *fontface)
{
return 0;
}
void freetype_get_glyphs(IDWriteFontFace4 *fontface, INT charmap, UINT32 const *codepoints, UINT32 count,
UINT16 *glyphs)
{
memset(glyphs, 0, count * sizeof(*glyphs));
}
BOOL freetype_has_kerning_pairs(IDWriteFontFace4 *fontface)
{
return FALSE;
}
INT32 freetype_get_kerning_pair_adjustment(IDWriteFontFace4 *fontface, UINT16 left, UINT16 right)
{
return 0;
}
void freetype_get_glyph_bbox(struct dwrite_glyphbitmap *bitmap)
{
SetRectEmpty(&bitmap->bbox);
}
void freetype_get_design_glyph_bbox(IDWriteFontFace4 *fontface, UINT16 unitsperEm, UINT16 glyph, RECT *bbox)
{
SetRectEmpty(bbox);
}
BOOL freetype_get_glyph_bitmap(struct dwrite_glyphbitmap *bitmap)
{
return FALSE;
}
INT freetype_get_charmap_index(IDWriteFontFace4 *fontface, BOOL *is_symbol)
{
*is_symbol = FALSE;
return -1;
}
INT32 freetype_get_glyph_advance(IDWriteFontFace4 *fontface, FLOAT emSize, UINT16 index, DWRITE_MEASURING_MODE mode,
BOOL *has_contours)
{
*has_contours = FALSE;
return 0;
}
#endif /* HAVE_FREETYPE */
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