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Sweden-Number/dlls/dwrite/freetype.c

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/*
* FreeType integration
*
* Copyright 2014 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
#endif /* HAVE_FT2BUILD_H */
#include "windef.h"
#include "dwrite_2.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;
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_Init_FreeType);
MAKE_FUNCPTR(FT_Library_Version);
MAKE_FUNCPTR(FT_Load_Glyph);
MAKE_FUNCPTR(FT_New_Memory_Face);
MAKE_FUNCPTR(FT_Outline_Transform);
MAKE_FUNCPTR(FTC_CMapCache_Lookup);
MAKE_FUNCPTR(FTC_CMapCache_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 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;
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);
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_Init_FreeType)
LOAD_FUNCPTR(FT_Library_Version)
LOAD_FUNCPTR(FT_Load_Glyph)
LOAD_FUNCPTR(FT_New_Memory_Face)
LOAD_FUNCPTR(FT_Outline_Transform)
LOAD_FUNCPTR(FTC_CMapCache_Lookup)
LOAD_FUNCPTR(FTC_CMapCache_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
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) {
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(IDWriteFontFace2 *fontface)
{
EnterCriticalSection(&freetype_cs);
pFTC_Manager_RemoveFaceID(cache_manager, fontface);
LeaveCriticalSection(&freetype_cs);
}
HRESULT freetype_get_design_glyph_metrics(IDWriteFontFace2 *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) {
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;
}
}
LeaveCriticalSection(&freetype_cs);
return S_OK;
}
BOOL freetype_is_monospaced(IDWriteFontFace2 *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;
}
static inline void ft_vector_to_d2d_point(const FT_Vector *v, D2D1_POINT_2F *p)
{
p->x = v->x / 64.0;
p->y = v->y / 64.0;
}
static HRESULT get_outline_data(const FT_Outline *outline, struct glyph_outline **ret)
{
short i, j, contour = 0;
D2D1_POINT_2F *points;
UINT16 count = 0;
UINT8 *tags;
HRESULT hr;
/* we need all curves in cubic format */
for (i = 0; i < outline->n_points; i++) {
/* control point */
if (!(outline->tags[i] & FT_Curve_Tag_On)) {
if (!(outline->tags[i] & FT_Curve_Tag_Cubic)) {
count++;
}
}
count++;
}
hr = new_glyph_outline(count, ret);
if (FAILED(hr))
return hr;
points = (*ret)->points;
tags = (*ret)->tags;
ft_vector_to_d2d_point(outline->points, points);
tags[0] = OUTLINE_POINT_START;
for (i = 1, j = 1; i < outline->n_points; i++, j++) {
/* mark start of new contour */
if (tags[j-1] & OUTLINE_POINT_END)
tags[j] = OUTLINE_POINT_START;
else
tags[j] = 0;
if (outline->tags[i] & FT_Curve_Tag_On) {
ft_vector_to_d2d_point(outline->points+i, points+j);
tags[j] |= OUTLINE_POINT_LINE;
}
else {
/* third order curve */
if (outline->tags[i] & FT_Curve_Tag_Cubic) {
/* store 3 points, advance 3 points */
ft_vector_to_d2d_point(outline->points+i, points+j);
ft_vector_to_d2d_point(outline->points+i+1, points+j+1);
ft_vector_to_d2d_point(outline->points+i+2, points+j+2);
i += 2;
}
else {
FT_Vector vec;
/* Convert the quadratic Beziers to cubic Beziers.
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 */
vec.x = 2 * outline->points[i].x + outline->points[i-1].x;
vec.y = 2 * outline->points[i].y + outline->points[i-1].y;
ft_vector_to_d2d_point(&vec, points+j);
points[j].x /= 3.0;
points[j].y /= 3.0;
/* r2 */
vec.x = 2 * outline->points[i].x + outline->points[i+1].x;
vec.y = 2 * outline->points[i].y + outline->points[i+1].y;
ft_vector_to_d2d_point(&vec, points+j+1);
points[j+1].x /= 3.0;
points[j+1].y /= 3.0;
/* r3 */
ft_vector_to_d2d_point(outline->points+i+1, points+j+2);
i++;
}
tags[j] = tags[j+1] = tags[j+2] = OUTLINE_POINT_BEZIER;
j += 2;
}
/* mark end point */
if (i < outline->n_points && outline->contours[contour] == i) {
tags[j] |= OUTLINE_POINT_END;
contour++;
}
}
return S_OK;
}
HRESULT freetype_get_glyph_outline(IDWriteFontFace2 *fontface, FLOAT emSize, UINT16 index, USHORT simulations, struct glyph_outline **ret)
{
FTC_ScalerRec scaler;
HRESULT hr = S_OK;
FT_Size size;
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) {
if (pFT_Load_Glyph(size->face, index, FT_LOAD_DEFAULT) == 0) {
FT_Outline *outline = &size->face->glyph->outline;
FT_Matrix m;
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);
hr = get_outline_data(outline, ret);
if (hr == S_OK)
(*ret)->advance = size->face->glyph->metrics.horiAdvance >> 6;
}
}
LeaveCriticalSection(&freetype_cs);
return hr;
}
UINT16 freetype_get_glyphcount(IDWriteFontFace2 *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;
}
UINT16 freetype_get_glyphindex(IDWriteFontFace2 *fontface, UINT32 codepoint)
{
UINT16 glyph;
EnterCriticalSection(&freetype_cs);
glyph = pFTC_CMapCache_Lookup(cmap_cache, fontface, -1, codepoint);
LeaveCriticalSection(&freetype_cs);
return glyph;
}
#else /* HAVE_FREETYPE */
BOOL init_freetype(void)
{
return FALSE;
}
void release_freetype(void)
{
}
void freetype_notify_cacheremove(IDWriteFontFace2 *fontface)
{
}
HRESULT freetype_get_design_glyph_metrics(IDWriteFontFace2 *fontface, UINT16 unitsperEm, UINT16 glyph, DWRITE_GLYPH_METRICS *ret)
{
return E_NOTIMPL;
}
BOOL freetype_is_monospaced(IDWriteFontFace2 *fontface)
{
return FALSE;
}
HRESULT freetype_get_glyph_outline(IDWriteFontFace2 *fontface, FLOAT emSize, UINT16 index, USHORT simulations, struct glyph_outline **ret)
{
*ret = NULL;
return E_NOTIMPL;
}
UINT16 freetype_get_glyphcount(IDWriteFontFace2 *fontface)
{
return 0;
}
UINT16 freetype_get_glyphindex(IDWriteFontFace2 *fontface, UINT32 codepoint)
{
return 0;
}
#endif /* HAVE_FREETYPE */
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