| /* |
| * Copyright © 2022 Behdad Esfahbod |
| * |
| * This is part of HarfBuzz, a text shaping library. |
| * |
| * Permission is hereby granted, without written agreement and without |
| * license or royalty fees, to use, copy, modify, and distribute this |
| * software and its documentation for any purpose, provided that the |
| * above copyright notice and the following two paragraphs appear in |
| * all copies of this software. |
| * |
| * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR |
| * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES |
| * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN |
| * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH |
| * DAMAGE. |
| * |
| * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, |
| * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS |
| * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO |
| * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
| */ |
| |
| #ifndef HB_LIMITS_HH |
| #define HB_LIMITS_HH |
| |
| #include "hb.hh" |
| |
| |
| #ifndef HB_BUFFER_MAX_LEN_FACTOR |
| #define HB_BUFFER_MAX_LEN_FACTOR 256 |
| #endif |
| #ifndef HB_BUFFER_MAX_LEN_MIN |
| #define HB_BUFFER_MAX_LEN_MIN 65536 |
| #endif |
| #ifndef HB_BUFFER_MAX_LEN_DEFAULT |
| #define HB_BUFFER_MAX_LEN_DEFAULT 0x3FFFFFFF /* Shaping more than a billion chars? Let us know! */ |
| #endif |
| |
| #ifndef HB_BUFFER_MAX_OPS_FACTOR |
| #define HB_BUFFER_MAX_OPS_FACTOR 4096 |
| #endif |
| #ifndef HB_BUFFER_MAX_OPS_MIN |
| #define HB_BUFFER_MAX_OPS_MIN 65536 |
| #endif |
| #ifndef HB_BUFFER_MAX_OPS_DEFAULT |
| #define HB_BUFFER_MAX_OPS_DEFAULT 0x1FFFFFFF /* Shaping more than a billion operations? Let us know! */ |
| #endif |
| |
| |
| #ifndef HB_MAX_NESTING_LEVEL |
| #define HB_MAX_NESTING_LEVEL 64 |
| #endif |
| |
| |
| #ifndef HB_MAX_CONTEXT_LENGTH |
| #define HB_MAX_CONTEXT_LENGTH 64 |
| #endif |
| |
| #ifndef HB_MAX_SYLLABLE_LENGTH |
| #define HB_MAX_SYLLABLE_LENGTH 64 |
| #endif |
| |
| #ifndef HB_CLOSURE_MAX_STAGES |
| /* |
| * The maximum number of times a lookup can be applied during shaping. |
| * Used to limit the number of iterations of the closure algorithm. |
| * This must be larger than the number of times add_gsub_pause() is |
| * called in a collect_features call of any shaper. |
| */ |
| #define HB_CLOSURE_MAX_STAGES 12 |
| #endif |
| |
| #ifndef HB_MAX_SCRIPTS |
| #define HB_MAX_SCRIPTS 500 |
| #endif |
| |
| #ifndef HB_MAX_LANGSYS |
| #define HB_MAX_LANGSYS 2000 |
| #endif |
| |
| #ifndef HB_MAX_LANGSYS_FEATURE_COUNT |
| #define HB_MAX_LANGSYS_FEATURE_COUNT 50000 |
| #endif |
| |
| #ifndef HB_MAX_FEATURE_INDICES |
| #define HB_MAX_FEATURE_INDICES 8000 |
| #endif |
| |
| #ifndef HB_MAX_LOOKUP_VISIT_COUNT |
| #define HB_MAX_LOOKUP_VISIT_COUNT 35000 |
| #endif |
| |
| #ifndef HB_MAX_GRAPH_EDGE_COUNT |
| #define HB_MAX_GRAPH_EDGE_COUNT 16384 |
| #endif |
| |
| #ifndef HB_VAR_COMPOSITE_MAX_AXES |
| #define HB_VAR_COMPOSITE_MAX_AXES 4096 |
| #endif |
| |
| #ifndef HB_GLYF_MAX_POINTS |
| #define HB_GLYF_MAX_POINTS 200000 |
| #endif |
| |
| #ifndef HB_CFF_MAX_OPS |
| #define HB_CFF_MAX_OPS 200000 |
| #endif |
| |
| #ifndef HB_MAX_COMPOSITE_OPERATIONS_PER_GLYPH |
| #define HB_MAX_COMPOSITE_OPERATIONS_PER_GLYPH 64 |
| #endif |
| |
| #ifndef HB_SVG_MAX_PATH_SEGMENTS |
| #define HB_SVG_MAX_PATH_SEGMENTS 262144 |
| #endif |
| |
| #ifndef HB_GPU_DRAW_MAX_CURVES |
| #define HB_GPU_DRAW_MAX_CURVES 65536 |
| #endif |
| |
| /* Tiles emitted by one hb_paint_sweep_gradient_tiles() call. Also |
| * sets the angular resolution (2π over this) below which a repeating |
| * color line is filled with its average color instead of tiled; |
| * a repeat/reflect color line whose stops span a tiny angle could |
| * otherwise emit millions of patches while covering 0..2π. */ |
| #ifndef HB_PAINT_MAX_SWEEP_TILES |
| #define HB_PAINT_MAX_SWEEP_TILES 4096 |
| #endif |
| |
| #ifndef HB_SVG_MAX_DOCUMENT_SIZE |
| #define HB_SVG_MAX_DOCUMENT_SIZE ((size_t) 16 << 20) |
| #endif |
| |
| #ifndef HB_RASTER_MAX_BUFFER_SIZE |
| #define HB_RASTER_MAX_BUFFER_SIZE ((size_t) 1 << 30) |
| #endif |
| |
| /* Maximum surface dimension (pixels per side) when extents are derived |
| * from font data (glyph extents or accumulated outline bounds). Bounds |
| * attacker-controlled allocations; extents set explicitly through |
| * hb_raster_{draw,paint}_set_extents() are not limited. */ |
| #ifndef HB_RASTER_MAX_AUTO_DIMENSION |
| #define HB_RASTER_MAX_AUTO_DIMENSION 4096 |
| #endif |
| |
| /* |
| * Cumulative work budgets. |
| * |
| * The limits above bound work within one subsystem: points per glyf |
| * glyph, ops per CFF charstring, nodes in a COLR or VARC graph, |
| * pixels per raster surface. When one subsystem drives another -- |
| * COLR driving a paint backend, a paint backend or VARC loading |
| * glyf/CFF outlines -- those limits multiply. Each driving session |
| * therefore carries one cumulative budget, initialized once per |
| * top-level entry and only ever decremented, shared by everything |
| * the session consumes. Once a budget is exhausted, further work |
| * is skipped best-effort. |
| */ |
| |
| /* One VARC glyph (draw or extents), shared by all leaf glyphs loaded |
| * from glyf/CFF/CFF2, in units of glyf points / CFF charstring ops. */ |
| #ifndef HB_VARC_MAX_WORK |
| #define HB_VARC_MAX_WORK ((int64_t) 1 << 20) |
| #endif |
| |
| /* One paint-extents session, in outline points consumed by |
| * clip-glyph draws. */ |
| #ifndef HB_PAINT_EXTENTS_MAX_WORK |
| #define HB_PAINT_EXTENTS_MAX_WORK ((int64_t) 1 << 20) |
| #endif |
| |
| /* One GPU paint walk, in curves consumed by clip encodes. */ |
| #ifndef HB_GPU_PAINT_MAX_WORK |
| #define HB_GPU_PAINT_MAX_WORK ((int64_t) 1 << 20) |
| #endif |
| |
| /* One vector (SVG/PDF) draw session, in bytes of generated outline |
| * path data. */ |
| #ifndef HB_VECTOR_MAX_DRAW_WORK |
| #define HB_VECTOR_MAX_DRAW_WORK ((int64_t) 16 << 20) |
| #endif |
| |
| /* One vector (SVG/PDF) paint session, in bytes of generated outline |
| * path and sweep-gradient patch data. */ |
| #ifndef HB_VECTOR_MAX_PAINT_WORK |
| #define HB_VECTOR_MAX_PAINT_WORK ((int64_t) 16 << 20) |
| #endif |
| |
| /* One raster paint session (everything painted between two |
| * render/clear calls), in pixel-op units; pixel loops charge their |
| * area, consumed outline segments are charged with a fixed weight. |
| * The session budget is the larger of this flat value and |
| * HB_RASTER_MAX_PAINT_WORK_PASSES full-surface passes, so very large |
| * surfaces still get a few full-surface operations. */ |
| #ifndef HB_RASTER_MAX_PAINT_WORK |
| #define HB_RASTER_MAX_PAINT_WORK ((int64_t) 1 << 26) |
| #endif |
| |
| #ifndef HB_RASTER_MAX_PAINT_WORK_PASSES |
| #define HB_RASTER_MAX_PAINT_WORK_PASSES 4 |
| #endif |
| |
| /* One raster draw session (everything drawn between two render/clear |
| * calls) through the standalone hb-raster-draw API, in Bézier |
| * subdivision steps. When driven by raster-paint, the paint session |
| * budget above is charged instead. */ |
| #ifndef HB_RASTER_MAX_DRAW_WORK |
| #define HB_RASTER_MAX_DRAW_WORK ((int64_t) 1 << 24) |
| #endif |
| |
| /* One raster draw session, in accumulated non-horizontal edges. */ |
| #ifndef HB_RASTER_MAX_DRAW_EDGES |
| #define HB_RASTER_MAX_DRAW_EDGES ((int64_t) 1 << 20) |
| #endif |
| |
| |
| #ifndef HB_REPACKER_MAX_ITERATIONS |
| #define HB_REPACKER_MAX_ITERATIONS 500 |
| #endif |
| |
| #ifndef HB_REPACKER_MAX_VERTICES |
| #define HB_REPACKER_MAX_VERTICES 800000 |
| #endif |
| |
| #ifndef HB_REPACKER_MAX_SPACES |
| #define HB_REPACKER_MAX_SPACES 8000 |
| #endif |
| |
| |
| #endif /* HB_LIMITS_HH */ |
