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ttf support

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git-svn-id: http://svn2.nishi.boats/svn/milsko/trunk@473 b9cfdab3-6d41-4d17-bbe4-086880011989
This commit is contained in:
NishiOwO
2025-10-23 07:33:54 +00:00
parent 9686e69abf
commit 705e68408a
14 changed files with 21167 additions and 20948 deletions
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167
src/text/draw.c
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@@ -1,13 +1,24 @@
/* $Id$ */
#include <Mw/Milsko.h>
#ifdef USE_STB_TRUETYPE
#include "../../external/stb_truetype.h"
typedef struct ttf {
stbtt_fontinfo font;
void* data;
float scale;
int ascent;
int descent;
} ttf_t;
#endif
#define FontWidth 7
#define FontHeight 14
static void bitmap_MwDrawText(MwWidget handle, MwPoint* point, const char* text, int bold, int align, MwLLColor color) {
int i = 0, x, y, sx, sy;
int tw;
int th;
int tw, th;
unsigned char* px;
MwRect r;
MwLLPixmap p;
@@ -69,20 +80,138 @@ static void bitmap_MwDrawText(MwWidget handle, MwPoint* point, const char* text,
free(px);
}
#ifdef USE_STB_TRUETYPE
static int ttf_MwDrawText(MwWidget handle, MwPoint* point, const char* text, int bold, int align, MwLLColor color) {
ttf_t* ttf = MwGetVoid(handle, MwNfont);
MwLLColor base;
unsigned char* px;
int tw, th;
MwRect r;
MwLLPixmap p;
int i;
int ax, lsb;
int x = 0;
if(ttf == NULL) return 1;
base = MwParseColor(handle, MwGetText(handle, MwNbackground));
tw = MwTextWidth(handle, text);
th = MwTextHeight(handle, text);
px = malloc(tw * th * 4);
memset(px, 0, tw * th * 4);
while(text[0] != 0) {
int c;
int x0, y0, x1, y1, cx, cy;
int ow, oh;
unsigned char* out;
text += MwUTF8ToUTF32(text, &c);
stbtt_GetCodepointHMetrics(&ttf->font, c, &ax, &lsb);
stbtt_GetCodepointBitmapBox(&ttf->font, c, ttf->scale, ttf->scale, &x0, &y0, &x1, &y1);
ow = x1 - x0;
oh = y1 - y0;
out = malloc(ow * oh);
stbtt_MakeCodepointBitmap(&ttf->font, out, ow, oh, ow, ttf->scale, ttf->scale, c);
for(cy = 0; cy < oh; cy++) {
for(cx = 0; cx < ow; cx++) {
int ox = x + (lsb * ttf->scale) + cx;
int oy = (ttf->ascent * ttf->scale) + y0 + cy;
unsigned char* opx = &px[(oy * tw + ox) * 4];
double a = out[cy * ow + cx];
if(a != 0) {
a /= 255;
a = 1 - a;
opx[0] = base->red * a;
opx[1] = base->green * a;
opx[2] = base->blue * a;
opx[3] = 255;
}
}
}
x += ax * ttf->scale;
free(out);
}
p = MwLoadRaw(handle, px, tw, th);
r.x = point->x;
r.y = point->y - th / 2;
r.width = tw;
r.height = th;
if(align == MwALIGNMENT_CENTER) {
r.x -= tw / 2;
} else if(align == MwALIGNMENT_END) {
r.x -= tw;
}
MwLLDrawPixmap(handle->lowlevel, &r, p);
MwLLDestroyPixmap(p);
free(px);
MwLLFreeColor(base);
return 0;
}
int ttf_MwTextWidth(MwWidget handle, const char* text) {
ttf_t* ttf = MwGetVoid(handle, MwNfont);
int ax, lsb;
int tw = 0;
if(ttf == NULL) return -1;
while(text[0] != 0) {
int c;
text += MwUTF8ToUTF32(text, &c);
stbtt_GetCodepointHMetrics(&ttf->font, c, &ax, &lsb);
tw += ax * ttf->scale;
}
return tw;
}
int ttf_MwTextHeight(MwWidget handle, int count) {
ttf_t* ttf = MwGetVoid(handle, MwNfont);
if(ttf == NULL) return -1;
return (ttf->ascent - ttf->descent) * ttf->scale * count;
}
#endif
void MwDrawText(MwWidget handle, MwPoint* point, const char* text, int bold, int align, MwLLColor color) {
bitmap_MwDrawText(handle, point, text, bold, align, color);
#ifdef USE_STB_TRUETYPE
if(ttf_MwDrawText(handle, point, text, bold, align, color))
#endif
bitmap_MwDrawText(handle, point, text, bold, align, color);
}
int MwTextWidth(MwWidget handle, const char* text) {
(void)handle;
int st;
/* TODO: check newline */
#ifdef USE_STB_TRUETYPE
if((st = ttf_MwTextWidth(handle, text)) != -1) return st;
#else
(void)handle;
#endif
return strlen(text) * FontWidth;
}
int MwTextHeight(MwWidget handle, const char* text) {
int c = 1;
int i = 0;
int st;
(void)handle;
(void)text;
@@ -93,5 +222,35 @@ int MwTextHeight(MwWidget handle, const char* text) {
if(out == '\n') c++;
}
#ifdef USE_STB_TRUETYPE
if((st = ttf_MwTextHeight(handle, c)) != -1) return st;
#endif
return FontHeight * c;
}
void* MwFontLoad(unsigned char* data, unsigned int size) {
#ifdef USE_STB_TRUETYPE
ttf_t* ttf = malloc(sizeof(*ttf));
ttf->data = malloc(size);
memcpy(ttf->data, data, size);
stbtt_InitFont(&ttf->font, ttf->data, 0);
ttf->scale = stbtt_ScaleForPixelHeight(&ttf->font, 16);
stbtt_GetFontVMetrics(&ttf->font, &ttf->ascent, &ttf->descent, 0);
return ttf;
#else
return NULL;
#endif
}
void MwFontFree(void* handle) {
#ifdef USE_STB_TRUETYPE
ttf_t* ttf = handle;
free(ttf->data);
free(ttf);
#else
(void)font;
#endif
}