110 lines
2.7 KiB
C
110 lines
2.7 KiB
C
/* vim: tabstop=4 shiftwidth=4 noexpandtab
|
|
*
|
|
*
|
|
* Shared-memory font management and access library.
|
|
*
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
#include <ft2build.h>
|
|
#include FT_FREETYPE_H
|
|
#include FT_CACHE_H
|
|
|
|
#include "graphics.h"
|
|
#include "shmemfonts.h"
|
|
|
|
static FT_Library library;
|
|
static FT_Face face; /* perhaps make this an array ? */
|
|
static FT_GlyphSlot slot;
|
|
static FT_UInt glyph_index;
|
|
static int initialized = 0;
|
|
|
|
#define SGFX(CTX,x,y,WIDTH) *((uint32_t *)&CTX[((WIDTH) * (y) + (x)) * 4])
|
|
#define FONT_SIZE 12
|
|
|
|
/*
|
|
* XXX: take font name as an argument / allow multiple fonts
|
|
*/
|
|
static void _loadSansSerif() {
|
|
char * font;
|
|
size_t s = 0;
|
|
int error;
|
|
font = (char *)syscall_shm_obtain(WINS_SERVER_IDENTIFIER ".fonts.sans-serif", &s);
|
|
error = FT_New_Memory_Face(library, font, s, 0, &face);
|
|
error = FT_Set_Pixel_Sizes(face, FONT_SIZE, FONT_SIZE);
|
|
}
|
|
|
|
void init_shmemfonts() {
|
|
if (!initialized) {
|
|
FT_Init_FreeType(&library);
|
|
_loadSansSerif();
|
|
initialized = 1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Draw a character to a context.
|
|
*/
|
|
static void draw_char(FT_Bitmap * bitmap, int x, int y, uint32_t fg, gfx_context_t * ctx) {
|
|
int i, j, p, q;
|
|
int x_max = x + bitmap->width;
|
|
int y_max = y + bitmap->rows;
|
|
for (j = y, q = 0; j < y_max; j++, q++) {
|
|
for ( i = x, p = 0; i < x_max; i++, p++) {
|
|
SGFX(ctx->backbuffer,i,j,ctx->width) = alpha_blend(SGFX(ctx->backbuffer,i,j,ctx->width),fg,rgb(bitmap->buffer[q * bitmap->width + p],0,0));
|
|
}
|
|
}
|
|
}
|
|
|
|
uint32_t draw_string_width(char * string) {
|
|
slot = face->glyph;
|
|
int pen_x = 0, i = 0;
|
|
int len = strlen(string);
|
|
int error;
|
|
|
|
for (i = 0; i < len; ++i) {
|
|
FT_UInt glyph_index;
|
|
|
|
glyph_index = FT_Get_Char_Index( face, string[i]);
|
|
error = FT_Load_Glyph(face, glyph_index, FT_LOAD_DEFAULT);
|
|
if (error) {
|
|
printf("Error loading glyph for '%c'\n", string[i]);
|
|
continue;
|
|
}
|
|
slot = (face)->glyph;
|
|
pen_x += slot->advance.x >> 6;
|
|
}
|
|
return pen_x;
|
|
}
|
|
|
|
void draw_string(gfx_context_t * ctx, int x, int y, uint32_t fg, char * string) {
|
|
slot = face->glyph;
|
|
int pen_x = x, pen_y = y, i = 0;
|
|
int len = strlen(string);
|
|
int error;
|
|
|
|
for (i = 0; i < len; ++i) {
|
|
FT_UInt glyph_index;
|
|
|
|
glyph_index = FT_Get_Char_Index( face, string[i]);
|
|
error = FT_Load_Glyph(face, glyph_index, FT_LOAD_DEFAULT);
|
|
if (error) {
|
|
printf("Error loading glyph for '%c'\n", string[i]);
|
|
continue;
|
|
}
|
|
slot = (face)->glyph;
|
|
if (slot->format == FT_GLYPH_FORMAT_OUTLINE) {
|
|
error = FT_Render_Glyph((face)->glyph, FT_RENDER_MODE_NORMAL);
|
|
if (error) {
|
|
printf("Error rendering glyph for '%c'\n", string[i]);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
draw_char(&slot->bitmap, pen_x + slot->bitmap_left, pen_y - slot->bitmap_top, fg, ctx);
|
|
pen_x += slot->advance.x >> 6;
|
|
pen_y += slot->advance.y >> 6;
|
|
}
|
|
}
|
|
|