120 lines
3.9 KiB
C
120 lines
3.9 KiB
C
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/****************************************************************************
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*
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* The MIT License (MIT)
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*
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* Copyright 2020 NXP
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* 'Software'), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject
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* to the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL VIVANTE AND/OR ITS SUPPLIERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*****************************************************************************/
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#ifndef _VFT_DRAW_H
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#define _VFT_DRAW_H
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#include <stdint.h>
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typedef enum eFontBlkType {
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eUnkBlock,
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eFontFaceDesc,
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eGlyphTableDesc,
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eKernTableDesc,
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eGlyphData,
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eMaxBlock
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}eFontBlock_t;
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static const int32_t BLK_HDR_SIZE = 4;
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typedef struct path_descriptor {
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float bounds[4];
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uint32_t num_draw_cmds;
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uint32_t draw_cmds_offset;
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float* draw_cmds; /* NOTE: this will be used while loading table, DONT REMOVE */
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}path_desc_t;
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typedef struct kern_desc {
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uint16_t unicode;
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uint16_t kern;
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}kern_desc_t;
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typedef struct glyph_descriptor {
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uint16_t unicode; /* unicode name */
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uint16_t horiz_adv_x; /* Short to align to 32-bit boundry */
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uint32_t kern_num_entries;
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uint32_t kern_table_offset;
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kern_desc_t* kern_table; /* NOTE: this will be used while loading table, DONT REMOVE */
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path_desc_t path;
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}glyph_desc_t;
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typedef struct font_face_info {
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int8_t font_family_name[64];
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uint16_t units_per_em;
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uint16_t ascent;
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uint16_t descent;
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uint16_t vg_font;
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uint32_t num_glyphs;
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glyph_desc_t* glyphs; /* NOTE: this will be used while loading table, DONT REMOVE */
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}font_face_desc_t;
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//NOTE: No glyph caching at this time
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/* Load vector font ROM table from file */
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font_face_desc_t* vft_load(char* vcft_file_path);
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/* Find glyph of given character from glyph table */
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glyph_desc_t* vft_find_glyph(font_face_desc_t* font_face, uint16_t ug2);
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/* Find distance between 2 glyph symbols */
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int vft_glyph_distance(glyph_desc_t* g1, glyph_desc_t* g2);
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/*
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* Get internal vector path of given glyph
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* This is internal function
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*/
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path_desc_t* vft_get_glyph_path(glyph_desc_t* g2);
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/* Draw vector font based glyph on given x,y co-ordinate */
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void vft_draw_glyph(int x, int y, glyph_desc_t* g2);
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/* Compute horizotal pixels coverted by this path */
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int vft_compute_dx(glyph_desc_t* g2);
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/* Unload font face descriptor and all glyphs */
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void vft_unload(font_face_desc_t*);
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/* Draw string with vector font s*/
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int vg_lite_vtf_draw_text(vg_lite_buffer_t *rt, int x, int y,
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vg_lite_blend_t blend,
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vg_lite_font_t font,
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vg_lite_matrix_t *matrix,
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vg_lite_font_attributes_t * attributes,
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char *text);
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/* Internal memory allocator API */
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void *_mem_allocate(int size);
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void _mem_free(void *buf);
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vg_lite_error_t vg_lite_load_font_data(vg_lite_font_t font, int font_height);
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font_face_desc_t* vft_load_from_buffer(char* buf_base, int file_size);
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void vg_lite_unload_font_data(void);
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#endif //!_VFT_DRAW_H
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