FT_GlyphSlot_Own_Bitmap( FT_GlyphSlot slot ) { if ( slot && slot->format == FT_GLYPH_FORMAT_BITMAP && !( slot->internal->flags & FT_GLYPH_OWN_BITMAP ) ) { FT_Bitmap bitmap; FT_Error error; FT_Bitmap_New( &bitmap ); error = FT_Bitmap_Copy( slot->library, &slot->bitmap, &bitmap ); if ( error ) return error; slot->bitmap = bitmap; slot->internal->flags |= FT_GLYPH_OWN_BITMAP; } return FT_Err_Ok; }
GlyphBLF *blf_glyph_add(FontBLF *font, unsigned int index, unsigned int c) { FT_GlyphSlot slot; GlyphBLF *g; FT_Error err; FT_Bitmap bitmap, tempbitmap; const bool is_sharp = (U.text_render & USER_TEXT_DISABLE_AA) != 0; int flags = FT_LOAD_TARGET_NORMAL | FT_LOAD_NO_HINTING | FT_LOAD_NO_BITMAP; FT_BBox bbox; unsigned int key; g = blf_glyph_search(font->glyph_cache, c); if (g) return g; /* glyphs are dynamically created as needed by font rendering. this means that * to make font rendering thread safe we have to do locking here. note that this * must be a lock for the whole library and not just per font, because the font * renderer uses a shared buffer internally */ BLI_spin_lock(font->ft_lib_mutex); /* search again after locking */ g = blf_glyph_search(font->glyph_cache, c); if (g) { BLI_spin_unlock(font->ft_lib_mutex); return g; } if (font->flags & BLF_HINTING) flags &= ~FT_LOAD_NO_HINTING; if (is_sharp) err = FT_Load_Glyph(font->face, (FT_UInt)index, FT_LOAD_TARGET_MONO); else err = FT_Load_Glyph(font->face, (FT_UInt)index, flags); if (err) { BLI_spin_unlock(font->ft_lib_mutex); return NULL; } /* get the glyph. */ slot = font->face->glyph; if (is_sharp) { err = FT_Render_Glyph(slot, FT_RENDER_MODE_MONO); /* Convert result from 1 bit per pixel to 8 bit per pixel */ /* Accum errors for later, fine if not interested beyond "ok vs any error" */ FT_Bitmap_New(&tempbitmap); err += FT_Bitmap_Convert(font->ft_lib, &slot->bitmap, &tempbitmap, 1); /* Does Blender use Pitch 1 always? It works so far */ err += FT_Bitmap_Copy(font->ft_lib, &tempbitmap, &slot->bitmap); err += FT_Bitmap_Done(font->ft_lib, &tempbitmap); } else { err = FT_Render_Glyph(slot, FT_RENDER_MODE_NORMAL); } if (err || slot->format != FT_GLYPH_FORMAT_BITMAP) { BLI_spin_unlock(font->ft_lib_mutex); return NULL; } g = (GlyphBLF *)MEM_callocN(sizeof(GlyphBLF), "blf_glyph_add"); g->c = c; g->idx = (FT_UInt)index; g->xoff = -1; g->yoff = -1; bitmap = slot->bitmap; g->width = (int)bitmap.width; g->height = (int)bitmap.rows; if (g->width && g->height) { if (is_sharp) { /* Font buffer uses only 0 or 1 values, Blender expects full 0..255 range */ int i; for (i = 0; i < (g->width * g->height); i++) { bitmap.buffer[i] = bitmap.buffer[i] ? 255 : 0; } } g->bitmap = (unsigned char *)MEM_mallocN((size_t)(g->width * g->height), "glyph bitmap"); memcpy((void *)g->bitmap, (void *)bitmap.buffer, (size_t)(g->width * g->height)); } g->advance = ((float)slot->advance.x) / 64.0f; g->advance_i = (int)g->advance; g->pos_x = (float)slot->bitmap_left; g->pos_y = (float)slot->bitmap_top; g->pitch = slot->bitmap.pitch; FT_Outline_Get_CBox(&(slot->outline), &bbox); g->box.xmin = ((float)bbox.xMin) / 64.0f; g->box.xmax = ((float)bbox.xMax) / 64.0f; g->box.ymin = ((float)bbox.yMin) / 64.0f; g->box.ymax = ((float)bbox.yMax) / 64.0f; key = blf_hash(g->c); BLI_addhead(&(font->glyph_cache->bucket[key]), g); BLI_spin_unlock(font->ft_lib_mutex); return g; }
/** 转换FT_GlyphSlot类型数据为LCUI_FontBMP */ static int Convert_FTGlyph( LCUI_FontBMP *bmp, FT_GlyphSlot slot, int mode ) { int error; size_t size; FT_BitmapGlyph bitmap_glyph; FT_Glyph glyph; /* 从字形槽中提取一个字形图像 * 请注意,创建的FT_Glyph对象必须与FT_Done_Glyph成对使用 */ error = FT_Get_Glyph( slot, &glyph ); if(error) { return -1; } /*---------------------- 打印字体信息 -------------------------- printf(" width= %ld, met->height= %ld\n" "horiBearingX = %ld, horiBearingY = %ld, horiAdvance = %ld\n" "vertBearingX = %ld, vertBearingY = %ld, vertAdvance = %ld\n", slot->metrics.width>>6, slot->metrics.height>>6, slot->metrics.horiBearingX>>6, slot->metrics.horiBearingY>>6, slot->metrics.horiAdvance>>6, slot->metrics.vertBearingX>>6, slot->metrics.vertBearingY>>6, slot->metrics.vertAdvance>>6 ); ------------------------------------------------------------*/ if ( glyph->format != FT_GLYPH_FORMAT_BITMAP ) { error = FT_Glyph_To_Bitmap(&glyph, mode, 0 ,1); if(error) { return -1; } } bitmap_glyph = (FT_BitmapGlyph)glyph; /* * FT_Glyph_Metrics结构体中保存字形度量,通过face->glyph->metrics结 * 构访问,可得到字形的宽、高、左边界距、上边界距、水平跨距等等。 * 注意:因为不是所有的字体都包含垂直度量,当FT_HAS_VERTICAL为假时, * vertBearingX,vertBearingY和vertAdvance的值是不可靠的,目前暂不考虑 * 此情况的处理。 * */ bmp->top = bitmap_glyph->top; bmp->left = slot->metrics.horiBearingX>>6; bmp->rows = bitmap_glyph->bitmap.rows; bmp->width = bitmap_glyph->bitmap.width; bmp->advance.x = slot->metrics.horiAdvance>>6; /* 水平跨距 */ bmp->advance.y = slot->metrics.vertAdvance>>6; /* 垂直跨距 */ /* 分配内存,用于保存字体位图 */ size = bmp->rows * bmp->width * sizeof(uchar_t); bmp->buffer = (uchar_t*)malloc( size ); if( !bmp->buffer ) { FT_Done_Glyph(glyph); return -1; } switch( bitmap_glyph->bitmap.pixel_mode ) { /* 8位灰度位图,直接拷贝 */ case FT_PIXEL_MODE_GRAY: memcpy( bmp->buffer, bitmap_glyph->bitmap.buffer, size ); break; /* 单色点阵图,需要转换 */ case FT_PIXEL_MODE_MONO: { FT_Bitmap bitmap; FT_Library lib; FT_Int x, y; uchar_t *t, *s; lib = FontLIB_GetLibrary(); FT_Bitmap_New( &bitmap ); /* 转换位图bitmap_glyph->bitmap至bitmap,1个像素占1个字节 */ FT_Bitmap_Convert( lib, &bitmap_glyph->bitmap, &bitmap, 1); s = bitmap.buffer; t = bmp->buffer; for( y=0; y<bmp->rows; ++y ) { for( x=0; x<bmp->width; ++x ) { *t = *s?255:0; ++t,++s; } } FT_Bitmap_Done( lib, &bitmap ); break; } /* 其它像素模式的位图,暂时先直接填充255,等需要时再完善 */ default: memset( bmp->buffer, 255, size ); break; } FT_Done_Glyph(glyph); return size; }
GlyphBLF *blf_glyph_add(FontBLF *font, unsigned int index, unsigned int c) { FT_GlyphSlot slot; GlyphBLF *g; FT_Error err; FT_Bitmap bitmap, tempbitmap; int sharp = (U.text_render & USER_TEXT_DISABLE_AA); FT_BBox bbox; unsigned int key; g = blf_glyph_search(font->glyph_cache, c); if (g) return g; if (sharp) err = FT_Load_Glyph(font->face, (FT_UInt)index, FT_LOAD_TARGET_MONO); else err = FT_Load_Glyph(font->face, (FT_UInt)index, FT_LOAD_TARGET_NORMAL | FT_LOAD_NO_HINTING | FT_LOAD_NO_BITMAP); /* Sure about NO_* flags? */ if (err) return NULL; /* get the glyph. */ slot = font->face->glyph; if (sharp) { err = FT_Render_Glyph(slot, FT_RENDER_MODE_MONO); /* Convert result from 1 bit per pixel to 8 bit per pixel */ /* Accum errors for later, fine if not interested beyond "ok vs any error" */ FT_Bitmap_New(&tempbitmap); err += FT_Bitmap_Convert(font->ft_lib, &slot->bitmap, &tempbitmap, 1); /* Does Blender use Pitch 1 always? It works so far */ err += FT_Bitmap_Copy(font->ft_lib, &tempbitmap, &slot->bitmap); err += FT_Bitmap_Done(font->ft_lib, &tempbitmap); } else { err = FT_Render_Glyph(slot, FT_RENDER_MODE_NORMAL); } if (err || slot->format != FT_GLYPH_FORMAT_BITMAP) return NULL; g = (GlyphBLF *)MEM_callocN(sizeof(GlyphBLF), "blf_glyph_add"); g->c = c; g->idx = (FT_UInt)index; g->xoff = -1; g->yoff = -1; bitmap = slot->bitmap; g->width = bitmap.width; g->height = bitmap.rows; if (g->width && g->height) { if (sharp) { /* Font buffer uses only 0 or 1 values, Blender expects full 0..255 range */ int i; for (i = 0; i < (g->width * g->height); i++) { bitmap.buffer[i] = 255 * bitmap.buffer[i]; } } g->bitmap = (unsigned char *)MEM_mallocN(g->width * g->height, "glyph bitmap"); memcpy((void *)g->bitmap, (void *)bitmap.buffer, g->width * g->height); } g->advance = ((float)slot->advance.x) / 64.0f; g->pos_x = slot->bitmap_left; g->pos_y = slot->bitmap_top; g->pitch = slot->bitmap.pitch; FT_Outline_Get_CBox(&(slot->outline), &bbox); g->box.xmin = ((float)bbox.xMin) / 64.0f; g->box.xmax = ((float)bbox.xMax) / 64.0f; g->box.ymin = ((float)bbox.yMin) / 64.0f; g->box.ymax = ((float)bbox.yMax) / 64.0f; key = blf_hash(g->c); BLI_addhead(&(font->glyph_cache->bucket[key]), g); return g; }
void ResourceTrueTypeFont::renderGlyphs(const GlyphHeightMap& _glyphHeightMap, const FT_Library& _ftLibrary, const FT_Face& _ftFace, FT_Int32 _ftLoadFlags, uint8* _texBuffer, int _texWidth, int _texHeight) { FT_Bitmap ftBitmap; FT_Bitmap_New(&ftBitmap); int texX = mGlyphSpacing, texY = mGlyphSpacing; for (GlyphHeightMap::const_iterator j = _glyphHeightMap.begin(); j != _glyphHeightMap.end(); ++j) { for (GlyphHeightMap::mapped_type::const_iterator i = j->second.begin(); i != j->second.end(); ++i) { GlyphInfo& info = *i->second; switch (info.codePoint) { case FontCodeType::Selected: case FontCodeType::SelectedBack: { renderGlyph<LAMode, false, false>(info, charMaskWhite, charMaskBlack, charMask.find(info.codePoint)->second, j->first, _texBuffer, _texWidth, _texHeight, texX, texY); // Manually adjust the glyph's width to zero. This prevents artifacts from appearing at the seams when // rendering multi-character selections. GlyphInfo* glyphInfo = getGlyphInfo(info.codePoint); glyphInfo->width = 0.0f; glyphInfo->uvRect.right = glyphInfo->uvRect.left; } break; case FontCodeType::Cursor: case FontCodeType::Tab: renderGlyph<LAMode, false, false>(info, charMaskWhite, charMaskBlack, charMask.find(info.codePoint)->second, j->first, _texBuffer, _texWidth, _texHeight, texX, texY); break; default: if (FT_Load_Glyph(_ftFace, i->first, _ftLoadFlags | FT_LOAD_RENDER) == 0) { if (_ftFace->glyph->bitmap.buffer != nullptr) { uint8* glyphBuffer = nullptr; switch (_ftFace->glyph->bitmap.pixel_mode) { case FT_PIXEL_MODE_GRAY: glyphBuffer = _ftFace->glyph->bitmap.buffer; break; case FT_PIXEL_MODE_MONO: // Convert the monochrome bitmap to 8-bit before rendering it. if (FT_Bitmap_Convert(_ftLibrary, &_ftFace->glyph->bitmap, &ftBitmap, 1) == 0) { // Go through the bitmap and convert all of the nonzero values to 0xFF (white). for (uint8* p = ftBitmap.buffer, * endP = p + ftBitmap.width * ftBitmap.rows; p != endP; ++p) *p ^= -*p ^ *p; glyphBuffer = ftBitmap.buffer; } break; } if (glyphBuffer != nullptr) renderGlyph<LAMode, true, Antialias>(info, charMaskWhite, charMaskWhite, charMaskWhite, j->first, _texBuffer, _texWidth, _texHeight, texX, texY, glyphBuffer); } } else { MYGUI_LOG(Warning, "ResourceTrueTypeFont: Cannot render glyph " << i->first << " for character " << info.codePoint << " in font '" << getResourceName() << "'."); } break; } } } FT_Bitmap_Done(_ftLibrary, &ftBitmap); }