97 lines
3.3 KiB
C
97 lines
3.3 KiB
C
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// Copyright (C) 2004-2021 Artifex Software, Inc.
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//
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// This file is part of MuPDF.
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//
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// MuPDF is free software: you can redistribute it and/or modify it under the
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// terms of the GNU Affero General Public License as published by the Free
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// Software Foundation, either version 3 of the License, or (at your option)
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// any later version.
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//
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// MuPDF is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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// FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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// details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with MuPDF. If not, see <https://www.gnu.org/licenses/agpl-3.0.en.html>
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//
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// Alternative licensing terms are available from the licensor.
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// For commercial licensing, see <https://www.artifex.com/> or contact
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// Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
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// CA 94129, USA, for further information.
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#ifndef MUPDF_FITZ_GLYPH_CACHE_H
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#define MUPDF_FITZ_GLYPH_CACHE_H
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#include "mupdf/fitz/context.h"
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#include "mupdf/fitz/geometry.h"
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#include "mupdf/fitz/font.h"
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#include "mupdf/fitz/pixmap.h"
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#include "mupdf/fitz/device.h"
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/**
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Purge all the glyphs from the cache.
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*/
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void fz_purge_glyph_cache(fz_context *ctx);
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/**
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Create a pixmap containing a rendered glyph.
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Lookup gid from font, clip it with scissor, and rendering it
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with aa bits of antialiasing into a new pixmap.
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The caller takes ownership of the pixmap and so must free it.
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Note: This function is no longer used for normal rendering
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operations, and is kept around just because we use it in the
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app. It should be considered "at risk" of removal from the API.
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*/
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fz_pixmap *fz_render_glyph_pixmap(fz_context *ctx, fz_font *font, int gid, fz_matrix *ctm, const fz_irect *scissor, int aa);
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/**
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Nasty PDF interpreter specific hernia, required to allow the
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interpreter to replay glyphs from a type3 font directly into
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the target device.
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This is only used in exceptional circumstances (such as type3
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glyphs that inherit current graphics state, or nested type3
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glyphs).
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*/
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void fz_render_t3_glyph_direct(fz_context *ctx, fz_device *dev, fz_font *font, int gid, fz_matrix trm, void *gstate, fz_default_colorspaces *def_cs);
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/**
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Force a type3 font to cache the displaylist for a given glyph
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id.
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This caching can involve reading the underlying file, so must
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happen ahead of time, so we aren't suddenly forced to read the
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file while playing a displaylist back.
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*/
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void fz_prepare_t3_glyph(fz_context *ctx, fz_font *font, int gid);
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/**
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Dump debug statistics for the glyph cache.
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*/
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void fz_dump_glyph_cache_stats(fz_context *ctx, fz_output *out);
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/**
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Perform subpixel quantisation and adjustment on a glyph matrix.
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ctm: On entry, the desired 'ideal' transformation for a glyph.
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On exit, adjusted to a (very similar) transformation quantised
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for subpixel caching.
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subpix_ctm: Initialised by the routine to the transform that
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should be used to render the glyph.
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qe, qf: which subpixel position we quantised to.
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Returns: the size of the glyph.
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Note: This is currently only exposed for use in our app. It
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should be considered "at risk" of removal from the API.
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*/
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float fz_subpixel_adjust(fz_context *ctx, fz_matrix *ctm, fz_matrix *subpix_ctm, unsigned char *qe, unsigned char *qf);
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#endif
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