Revision 319
documented font. also changed a bit the timer
| font.c | ||
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| 8 | 8 |
#include "errors.h" |
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#include <assert.h> |
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/// GLYPH |
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/** |
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* @brief Text glyph. Represents a letter that can be drawn. |
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*/ |
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typedef struct {
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uint16_t w, h; |
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uint8_t *map; |
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} glyph_t; |
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/** |
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* @brief Construct glyph. |
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* @param xpm XPM describing the glyph |
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* @return Pointer to created glyph |
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*/ |
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static glyph_t* (glyph_ctor)(const char **xpm){
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if(xpm == NULL) return NULL; |
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glyph_t *ret = malloc(sizeof(glyph_t)); |
| ... | ... | |
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} |
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return ret; |
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} |
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/** |
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* @brief Destruct glyph. |
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* @param p Pointer to glyph to be destroyed |
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*/ |
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static void (glyph_dtor)(glyph_t *p){
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if(p == NULL) return; |
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free(p->map); |
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free(p); |
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} |
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/** |
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* @brief Draw glyph to an alpha-buffer. |
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* |
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* An alpha-buffer is an array of uint8_t that represents transparencies. |
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* It proves fit as a tool for drawing text. |
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* @param p Pointer to glyph to be drawn |
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* @param x X-position to draw the glyph |
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* @param y Y-position to draw the glyph |
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* @param alp_buf Alpha-buffer to which the glyph will be drawn |
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* @param W Width of the alpha-buffer |
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* @param H Height of the alpha-buffer |
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*/ |
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static int (glyph_draw_to_alpha_buffer)(const glyph_t *p, int16_t x, int16_t y, uint8_t *alp_buf, uint16_t W, uint16_t H){
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if(p == NULL) return NULL_PTR; |
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for(int16_t h = 0; h < p->h; ++h){
|
| ... | ... | |
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return NULL; |
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} |
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} |
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int (font_dtor)(font_t *p){
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if(p == NULL) return SUCCESS;
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void (font_dtor)(font_t *p){
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if(p == NULL) return; |
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for(size_t i = 0; i < p->nchars; ++i) |
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glyph_dtor(p->glyphs[i]); |
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free(p->glyphs); |
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free(p); |
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return SUCCESS; |
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} |
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|
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static font_t *consolas = NULL; |
| ... | ... | |
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} |
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const font_t* font_get_default(void){ return default_font; }
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const font_t* font_get_consolas(void){ return consolas; }
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int (font_free)(void){
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int r; |
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if((r = font_dtor(consolas))) return r; |
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void (font_free)(void){
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font_dtor(consolas); |
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consolas = NULL; |
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default_font = NULL; |
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return SUCCESS; |
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} |
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/// TEXT |
| ... | ... | |
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if(p->txt == NULL) return; |
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strcpy(p->txt, txt); |
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} |
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char* (text_get_string)(const text_t *p){return p->txt; }
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const char* (text_get_string)(const text_t *p){return p->txt; }
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void (text_set_pos) (text_t *p, int16_t x, int16_t y){ p->x = x; p->y = y; }
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void (text_set_size) (text_t *p, unsigned size ){ p->size = size ; }
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void (text_set_color) (text_t *p, uint32_t color ){ p->color = color ; }
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