refactor font.c into an MwFL section (#9)

Reviewed-on: https://gitea.nishi.boats/pyrite-dev/milsko/pulls/9 Co-authored-by: IoIxD <alphaproject217@gmail.com> Co-committed-by: IoIxD <alphaproject217@gmail.com>
2026-03-04 13:59:28 -06:00 · 2026-03-04 13:59:28 -06:00 · e09eccbf5f
commit e09eccbf5f
parent b3735fa364
15 changed files with 489 additions and 416 deletions
--- a/src/text/ft2.c
+++ b/src/text/ft2.c
@ -0,0 +1,139 @@
+#ifdef USE_FREETYPE2
+#include <Mw/Milsko.h>
+
+#include <ft2build.h>
+#include FT_FREETYPE_H
+
+struct _MwFLFont {
+	FT_Library library;
+	FT_Face	   face;
+	void*	   data;
+};
+static int ft2_MwDrawText(MwWidget handle, MwPoint* point, const char* text, int bold, int align, MwLLColor color) {
+	MwFLFont       ttf = MwGetVoid(handle, bold ? MwNboldFont : MwNfont);
+	int	       tw, th;
+	unsigned char* px;
+	MwLLPixmap     p;
+	MwRect	       r;
+	int	       x = 0, y = 0;
+	if(ttf == NULL) return 1;
+
+	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;
+		FT_Bitmap* bmp;
+		int	   cy, cx;
+		int	   l = MwUTF8ToUTF32(text, &c);
+		if(l <= 0) break;
+		text += l;
+
+		if(c == '\n') {
+			x = 0;
+			y += ttf->face->height * 14 / ttf->face->units_per_EM;
+			continue;
+		}
+
+		FT_Load_Char(ttf->face, c, FT_LOAD_RENDER);
+		bmp = &ttf->face->glyph->bitmap;
+
+		for(cy = 0; cy < bmp->rows; cy++) {
+			for(cx = 0; cx < bmp->width; cx++) {
+				int	       ox  = x + cx + ttf->face->glyph->bitmap_left;
+				int	       oy  = y + (ttf->face->height * 14 / ttf->face->units_per_EM) - ttf->face->glyph->bitmap_top + cy + (ttf->face->descender * 14 / ttf->face->units_per_EM);
+				unsigned char* opx = &px[(oy * tw + ox) * 4];
+
+				opx[0] = color->common.red;
+				opx[1] = color->common.green;
+				opx[2] = color->common.blue;
+				opx[3] = bmp->buffer[cy * bmp->pitch + cx];
+			}
+		}
+
+		x += ttf->face->glyph->metrics.horiAdvance / 64;
+	}
+
+	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);
+
+	return 0;
+}
+
+static int ft2_MwTextWidth(MwWidget handle, const char* text) {
+	MwFLFont ttf = MwGetVoid(handle, MwNfont);
+	int	 tw = 0, mtw = 0;
+	if(ttf == NULL) return -1;
+
+	while(text[0] != 0) {
+		int c;
+		int l = MwUTF8ToUTF32(text, &c);
+		if(l <= 0) break;
+		text += l;
+		if(c == '\n') {
+			tw = 0;
+			continue;
+		}
+
+		FT_Load_Char(ttf->face, c, FT_LOAD_RENDER);
+
+		tw += ttf->face->glyph->metrics.horiAdvance / 64;
+		if(tw > mtw) mtw = tw;
+	}
+
+	return mtw;
+}
+
+static int ft2_MwTextHeight(MwWidget handle, int count) {
+	MwFLFont ttf = MwGetVoid(handle, MwNfont);
+	if(ttf == NULL) return -1;
+
+	return (ttf->face->height * 14 / ttf->face->units_per_EM) * count;
+}
+
+static void* ft2_MwFontLoad(unsigned char* data, unsigned int size) {
+	MwFLFont ttf = malloc(sizeof(*ttf));
+	ttf->data    = malloc(size);
+	memcpy(ttf->data, data, size);
+	FT_Init_FreeType(&ttf->library);
+	FT_New_Memory_Face(ttf->library, ttf->data, size, 0, &ttf->face);
+
+	FT_Set_Pixel_Sizes(ttf->face, 0, 14);
+
+	return ttf;
+}
+
+static void ft2_MwFontFree(void* handle) {
+	MwFLFont ttf = handle;
+
+	FT_Done_Face(ttf->face);
+	FT_Done_FreeType(ttf->library);
+
+	free(ttf->data);
+	free(ttf);
+}
+
+int MWFL_FT2Setup() {
+	MwFLDrawText   = ft2_MwDrawText;
+	MwFLTextWidth  = ft2_MwTextWidth;
+	MwFLTextHeight = ft2_MwTextHeight;
+	MwFLFontLoad   = ft2_MwFontLoad;
+	MwFLFontFree   = ft2_MwFontFree;
+	return 0;
+}
+#endif