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495 lines
14 KiB
C
495 lines
14 KiB
C
/*
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* FreeType integration
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*
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* Copyright 2014 Nikolay Sivov for CodeWeavers
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#define COBJMACROS
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#include "config.h"
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#include "wine/port.h"
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#ifdef HAVE_FT2BUILD_H
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#include <ft2build.h>
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#include FT_CACHE_H
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#include FT_FREETYPE_H
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#include FT_OUTLINE_H
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#endif /* HAVE_FT2BUILD_H */
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#include "windef.h"
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#include "dwrite_2.h"
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#include "wine/library.h"
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#include "wine/debug.h"
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#include "dwrite_private.h"
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WINE_DEFAULT_DEBUG_CHANNEL(dwrite);
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#ifdef HAVE_FREETYPE
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static CRITICAL_SECTION freetype_cs;
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static CRITICAL_SECTION_DEBUG critsect_debug =
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{
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0, 0, &freetype_cs,
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{ &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
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0, 0, { (DWORD_PTR)(__FILE__ ": freetype_cs") }
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};
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static CRITICAL_SECTION freetype_cs = { &critsect_debug, -1, 0, 0, 0, 0 };
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static void *ft_handle = NULL;
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static FT_Library library = 0;
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static FTC_Manager cache_manager = 0;
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static FTC_CMapCache cmap_cache = 0;
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typedef struct
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{
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FT_Int major;
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FT_Int minor;
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FT_Int patch;
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} FT_Version_t;
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#define MAKE_FUNCPTR(f) static typeof(f) * p##f = NULL
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MAKE_FUNCPTR(FT_Done_FreeType);
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MAKE_FUNCPTR(FT_Get_Kerning);
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MAKE_FUNCPTR(FT_Init_FreeType);
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MAKE_FUNCPTR(FT_Library_Version);
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MAKE_FUNCPTR(FT_Load_Glyph);
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MAKE_FUNCPTR(FT_New_Memory_Face);
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MAKE_FUNCPTR(FT_Outline_Transform);
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MAKE_FUNCPTR(FTC_CMapCache_Lookup);
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MAKE_FUNCPTR(FTC_CMapCache_New);
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MAKE_FUNCPTR(FTC_Manager_New);
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MAKE_FUNCPTR(FTC_Manager_Done);
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MAKE_FUNCPTR(FTC_Manager_LookupFace);
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MAKE_FUNCPTR(FTC_Manager_LookupSize);
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MAKE_FUNCPTR(FTC_Manager_RemoveFaceID);
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#undef MAKE_FUNCPTR
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static FT_Error face_requester(FTC_FaceID face_id, FT_Library library, FT_Pointer request_data, FT_Face *face)
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{
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IDWriteFontFace *fontface = (IDWriteFontFace*)face_id;
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IDWriteFontFileStream *stream;
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IDWriteFontFile *file;
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const void *data_ptr;
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UINT32 index, count;
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FT_Error fterror;
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UINT64 data_size;
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void *context;
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HRESULT hr;
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*face = NULL;
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count = 1;
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hr = IDWriteFontFace_GetFiles(fontface, &count, &file);
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if (FAILED(hr))
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return FT_Err_Ok;
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hr = get_filestream_from_file(file, &stream);
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IDWriteFontFile_Release(file);
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if (FAILED(hr))
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return FT_Err_Ok;
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hr = IDWriteFontFileStream_GetFileSize(stream, &data_size);
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if (FAILED(hr)) {
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fterror = FT_Err_Invalid_Stream_Read;
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goto fail;
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}
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hr = IDWriteFontFileStream_ReadFileFragment(stream, &data_ptr, 0, data_size, &context);
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if (FAILED(hr)) {
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fterror = FT_Err_Invalid_Stream_Read;
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goto fail;
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}
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index = IDWriteFontFace_GetIndex(fontface);
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fterror = pFT_New_Memory_Face(library, data_ptr, data_size, index, face);
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IDWriteFontFileStream_ReleaseFileFragment(stream, context);
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fail:
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IDWriteFontFileStream_Release(stream);
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return fterror;
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}
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BOOL init_freetype(void)
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{
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FT_Version_t FT_Version;
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ft_handle = wine_dlopen(SONAME_LIBFREETYPE, RTLD_NOW, NULL, 0);
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if (!ft_handle) {
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WINE_MESSAGE("Wine cannot find the FreeType font library.\n");
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return FALSE;
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}
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#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;}
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LOAD_FUNCPTR(FT_Done_FreeType)
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LOAD_FUNCPTR(FT_Get_Kerning)
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LOAD_FUNCPTR(FT_Init_FreeType)
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LOAD_FUNCPTR(FT_Library_Version)
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LOAD_FUNCPTR(FT_Load_Glyph)
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LOAD_FUNCPTR(FT_New_Memory_Face)
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LOAD_FUNCPTR(FT_Outline_Transform)
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LOAD_FUNCPTR(FTC_CMapCache_Lookup)
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LOAD_FUNCPTR(FTC_CMapCache_New)
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LOAD_FUNCPTR(FTC_Manager_New)
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LOAD_FUNCPTR(FTC_Manager_Done)
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LOAD_FUNCPTR(FTC_Manager_LookupFace)
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LOAD_FUNCPTR(FTC_Manager_LookupSize)
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LOAD_FUNCPTR(FTC_Manager_RemoveFaceID)
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#undef LOAD_FUNCPTR
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if (pFT_Init_FreeType(&library) != 0) {
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ERR("Can't init FreeType library\n");
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wine_dlclose(ft_handle, NULL, 0);
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ft_handle = NULL;
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return FALSE;
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}
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pFT_Library_Version(library, &FT_Version.major, &FT_Version.minor, &FT_Version.patch);
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/* init cache manager */
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if (pFTC_Manager_New(library, 0, 0, 0, &face_requester, NULL, &cache_manager) != 0 ||
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pFTC_CMapCache_New(cache_manager, &cmap_cache) != 0) {
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ERR("Failed to init FreeType cache\n");
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pFTC_Manager_Done(cache_manager);
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pFT_Done_FreeType(library);
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wine_dlclose(ft_handle, NULL, 0);
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ft_handle = NULL;
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return FALSE;
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}
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TRACE("FreeType version is %d.%d.%d\n", FT_Version.major, FT_Version.minor, FT_Version.patch);
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return TRUE;
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sym_not_found:
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WINE_MESSAGE("Wine cannot find certain functions that it needs from FreeType library.\n");
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wine_dlclose(ft_handle, NULL, 0);
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ft_handle = NULL;
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return FALSE;
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}
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void release_freetype(void)
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{
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pFTC_Manager_Done(cache_manager);
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pFT_Done_FreeType(library);
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}
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void freetype_notify_cacheremove(IDWriteFontFace2 *fontface)
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{
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EnterCriticalSection(&freetype_cs);
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pFTC_Manager_RemoveFaceID(cache_manager, fontface);
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LeaveCriticalSection(&freetype_cs);
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}
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HRESULT freetype_get_design_glyph_metrics(IDWriteFontFace2 *fontface, UINT16 unitsperEm, UINT16 glyph, DWRITE_GLYPH_METRICS *ret)
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{
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FTC_ScalerRec scaler;
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FT_Size size;
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scaler.face_id = fontface;
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scaler.width = unitsperEm;
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scaler.height = unitsperEm;
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scaler.pixel = 1;
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scaler.x_res = 0;
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scaler.y_res = 0;
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EnterCriticalSection(&freetype_cs);
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if (pFTC_Manager_LookupSize(cache_manager, &scaler, &size) == 0) {
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if (pFT_Load_Glyph(size->face, glyph, FT_LOAD_NO_SCALE) == 0) {
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FT_Glyph_Metrics *metrics = &size->face->glyph->metrics;
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ret->leftSideBearing = metrics->horiBearingX;
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ret->advanceWidth = metrics->horiAdvance;
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ret->rightSideBearing = metrics->horiAdvance - metrics->horiBearingX - metrics->width;
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ret->topSideBearing = metrics->vertBearingY;
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ret->advanceHeight = metrics->vertAdvance;
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ret->bottomSideBearing = metrics->vertAdvance - metrics->vertBearingY - metrics->height;
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ret->verticalOriginY = metrics->height + metrics->vertBearingY;
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}
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}
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LeaveCriticalSection(&freetype_cs);
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return S_OK;
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}
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BOOL freetype_is_monospaced(IDWriteFontFace2 *fontface)
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{
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BOOL is_monospaced = FALSE;
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FT_Face face;
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EnterCriticalSection(&freetype_cs);
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if (pFTC_Manager_LookupFace(cache_manager, fontface, &face) == 0)
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is_monospaced = FT_IS_FIXED_WIDTH(face);
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LeaveCriticalSection(&freetype_cs);
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return is_monospaced;
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}
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static inline void ft_vector_to_d2d_point(const FT_Vector *v, D2D1_POINT_2F *p)
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{
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p->x = v->x / 64.0;
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p->y = v->y / 64.0;
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}
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static HRESULT get_outline_data(const FT_Outline *outline, struct glyph_outline **ret)
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{
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short i, j, contour = 0;
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D2D1_POINT_2F *points;
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UINT16 count = 0;
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UINT8 *tags;
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HRESULT hr;
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/* we need all curves in cubic format */
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for (i = 0; i < outline->n_points; i++) {
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/* control point */
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if (!(outline->tags[i] & FT_Curve_Tag_On)) {
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if (!(outline->tags[i] & FT_Curve_Tag_Cubic)) {
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count++;
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}
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}
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count++;
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}
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hr = new_glyph_outline(count, ret);
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if (FAILED(hr))
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return hr;
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points = (*ret)->points;
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tags = (*ret)->tags;
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ft_vector_to_d2d_point(outline->points, points);
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tags[0] = OUTLINE_POINT_START;
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for (i = 1, j = 1; i < outline->n_points; i++, j++) {
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/* mark start of new contour */
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if (tags[j-1] & OUTLINE_POINT_END)
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tags[j] = OUTLINE_POINT_START;
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else
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tags[j] = 0;
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if (outline->tags[i] & FT_Curve_Tag_On) {
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ft_vector_to_d2d_point(outline->points+i, points+j);
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tags[j] |= OUTLINE_POINT_LINE;
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}
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else {
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/* third order curve */
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if (outline->tags[i] & FT_Curve_Tag_Cubic) {
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/* store 3 points, advance 3 points */
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ft_vector_to_d2d_point(outline->points+i, points+j);
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ft_vector_to_d2d_point(outline->points+i+1, points+j+1);
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ft_vector_to_d2d_point(outline->points+i+2, points+j+2);
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i += 2;
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}
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else {
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FT_Vector vec;
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/* Convert the quadratic Beziers to cubic Beziers.
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The parametric eqn for a cubic Bezier is, from PLRM:
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r(t) = at^3 + bt^2 + ct + r0
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with the control points:
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r1 = r0 + c/3
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r2 = r1 + (c + b)/3
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r3 = r0 + c + b + a
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A quadratic Bezier has the form:
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p(t) = (1-t)^2 p0 + 2(1-t)t p1 + t^2 p2
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So equating powers of t leads to:
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r1 = 2/3 p1 + 1/3 p0
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r2 = 2/3 p1 + 1/3 p2
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and of course r0 = p0, r3 = p2
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*/
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/* r1 */
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vec.x = 2 * outline->points[i].x + outline->points[i-1].x;
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vec.y = 2 * outline->points[i].y + outline->points[i-1].y;
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ft_vector_to_d2d_point(&vec, points+j);
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points[j].x /= 3.0;
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points[j].y /= 3.0;
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/* r2 */
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vec.x = 2 * outline->points[i].x + outline->points[i+1].x;
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vec.y = 2 * outline->points[i].y + outline->points[i+1].y;
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ft_vector_to_d2d_point(&vec, points+j+1);
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points[j+1].x /= 3.0;
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points[j+1].y /= 3.0;
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/* r3 */
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ft_vector_to_d2d_point(outline->points+i+1, points+j+2);
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i++;
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}
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tags[j] = tags[j+1] = tags[j+2] = OUTLINE_POINT_BEZIER;
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j += 2;
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}
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/* mark end point */
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if (i < outline->n_points && outline->contours[contour] == i) {
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tags[j] |= OUTLINE_POINT_END;
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contour++;
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}
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}
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return S_OK;
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}
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HRESULT freetype_get_glyph_outline(IDWriteFontFace2 *fontface, FLOAT emSize, UINT16 index, USHORT simulations, struct glyph_outline **ret)
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{
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FTC_ScalerRec scaler;
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HRESULT hr = S_OK;
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FT_Size size;
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scaler.face_id = fontface;
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scaler.width = emSize;
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scaler.height = emSize;
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scaler.pixel = 1;
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scaler.x_res = 0;
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scaler.y_res = 0;
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EnterCriticalSection(&freetype_cs);
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if (pFTC_Manager_LookupSize(cache_manager, &scaler, &size) == 0) {
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if (pFT_Load_Glyph(size->face, index, FT_LOAD_DEFAULT) == 0) {
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FT_Outline *outline = &size->face->glyph->outline;
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FT_Matrix m;
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m.xx = 1 << 16;
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m.xy = simulations & DWRITE_FONT_SIMULATIONS_OBLIQUE ? (1 << 16) / 3 : 0;
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m.yx = 0;
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m.yy = -(1 << 16); /* flip Y axis */
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pFT_Outline_Transform(outline, &m);
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hr = get_outline_data(outline, ret);
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if (hr == S_OK)
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(*ret)->advance = size->face->glyph->metrics.horiAdvance >> 6;
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}
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}
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LeaveCriticalSection(&freetype_cs);
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return hr;
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}
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UINT16 freetype_get_glyphcount(IDWriteFontFace2 *fontface)
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{
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UINT16 count = 0;
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FT_Face face;
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EnterCriticalSection(&freetype_cs);
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if (pFTC_Manager_LookupFace(cache_manager, fontface, &face) == 0)
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count = face->num_glyphs;
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LeaveCriticalSection(&freetype_cs);
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return count;
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}
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UINT16 freetype_get_glyphindex(IDWriteFontFace2 *fontface, UINT32 codepoint)
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{
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UINT16 glyph;
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EnterCriticalSection(&freetype_cs);
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glyph = pFTC_CMapCache_Lookup(cmap_cache, fontface, -1, codepoint);
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LeaveCriticalSection(&freetype_cs);
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return glyph;
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}
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BOOL freetype_has_kerning_pairs(IDWriteFontFace2 *fontface)
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{
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BOOL has_kerning_pairs = FALSE;
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FT_Face face;
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EnterCriticalSection(&freetype_cs);
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if (pFTC_Manager_LookupFace(cache_manager, fontface, &face) == 0)
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has_kerning_pairs = FT_HAS_KERNING(face);
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LeaveCriticalSection(&freetype_cs);
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return has_kerning_pairs;
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}
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INT32 freetype_get_kerning_pair_adjustment(IDWriteFontFace2 *fontface, UINT16 left, UINT16 right)
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{
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INT32 adjustment = 0;
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FT_Face face;
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EnterCriticalSection(&freetype_cs);
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if (pFTC_Manager_LookupFace(cache_manager, fontface, &face) == 0) {
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FT_Vector kern;
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if (FT_HAS_KERNING(face)) {
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pFT_Get_Kerning(face, left, right, FT_KERNING_UNSCALED, &kern);
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adjustment = kern.x;
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}
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}
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LeaveCriticalSection(&freetype_cs);
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return adjustment;
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}
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#else /* HAVE_FREETYPE */
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BOOL init_freetype(void)
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{
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return FALSE;
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}
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void release_freetype(void)
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{
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}
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void freetype_notify_cacheremove(IDWriteFontFace2 *fontface)
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{
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}
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HRESULT freetype_get_design_glyph_metrics(IDWriteFontFace2 *fontface, UINT16 unitsperEm, UINT16 glyph, DWRITE_GLYPH_METRICS *ret)
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{
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return E_NOTIMPL;
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}
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BOOL freetype_is_monospaced(IDWriteFontFace2 *fontface)
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{
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return FALSE;
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}
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HRESULT freetype_get_glyph_outline(IDWriteFontFace2 *fontface, FLOAT emSize, UINT16 index, USHORT simulations, struct glyph_outline **ret)
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{
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*ret = NULL;
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return E_NOTIMPL;
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}
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UINT16 freetype_get_glyphcount(IDWriteFontFace2 *fontface)
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{
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return 0;
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}
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UINT16 freetype_get_glyphindex(IDWriteFontFace2 *fontface, UINT32 codepoint)
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{
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return 0;
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}
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BOOL freetype_has_kerning_pairs(IDWriteFontFace2 *fontface)
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{
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return FALSE;
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}
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INT32 freetype_get_kerning_pair_adjustment(IDWriteFontFace2 *fontface, UINT16 left, UINT16 right)
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{
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return 0;
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}
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#endif /* HAVE_FREETYPE */
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