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