From eeb5831bb4d62c35eca6db333137a9b8bf682e6e Mon Sep 17 00:00:00 2001
From: Nicholas Noll <nbnoll@eml.cc>
Date: Sat, 6 Jun 2020 11:04:36 -0700
Subject: deprecated wayland

---
 sys/libfont/test.c | 119 +++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 116 insertions(+), 3 deletions(-)

(limited to 'sys/libfont/test.c')

diff --git a/sys/libfont/test.c b/sys/libfont/test.c
index 7ce9dc0..5097009 100644
--- a/sys/libfont/test.c
+++ b/sys/libfont/test.c
@@ -2,16 +2,128 @@
 #include <libn.h>
 #include <libfont.h>
 
+#include <fontconfig/fontconfig.h>
+#include <freetype2/ft2build.h>
+#include FT_FREETYPE_H /* ugh */
+
 #define STB_IMAGE_WRITE_IMPLEMENTATION
 #include "stb_image_write.h"
 
 #define DIV 2
 #define W 1920/DIV
-#define H 1080
-#define L H/80
+#define H 1080/2
+#define L H/35
+
+static char *phrase   = "abcdefghijklmnopqrstuvwxyx";
+static byte *fontpath = "/home/nolln/root/data/Inconsolata-Regular.ttf";
+
+static FT_Library   lib;
+static FT_Face      face;
+
+static
+void
+loadfonts(int size)
+{
+    FT_New_Face(lib, (const byte*)fontpath, 0, &face);
+    FT_Set_Char_Size(face, 0, size << 6, 72, 72);
+}
+
+int
+main()
+{
+    int i, x, y, x0, y0, c, r, err;
+    FT_GlyphSlot slot;
+    FT_Bitmap    bitmap;
+    FT_UInt      index;
+    uchar       *pixel;
+    font·Info   *info;
+
+    pixel = calloc(H,W);
+    mmap·Reader fontfile;
+
+    err = 0;
+    fontfile = mmap·open(fontpath);
+    if (!fontfile.len) {
+        panicf("fail");
+    }
+
+    // info   = font·make(fontfile.ubuf, 0, mem·sys, nil);
+    if (!info) 
+        panicf("failed to load info");
+
+    if (!FcInit())
+        panicf("could not initialize fontconfig");
+    if (FT_Init_FreeType(&lib))
+        panicf("could not initialize freetype");
+
+    loadfonts(14);
 
-static char *phrase = "strlen(info)=000";
+    x0 = 10, y0 = 100;
+    slot = face->glyph;
+    for (i = 0; i < strlen(phrase); i++) {
+        printf("phrase[i]='%c'\n", phrase[i]);
+        err = FT_Load_Char(face, (rune)phrase[i], FT_LOAD_RENDER);
+        if (err)
+            panicf("failed to load font face");
+
+        x = x0 + slot->bitmap_left;
+        y = y0 - slot->bitmap_top;
+        printf("buffer size: [%d, %d]\n", slot->bitmap.rows, slot->bitmap.width);
+        for (c = 0; c < slot->bitmap.width; c++) {
+            for (r = 0; r < slot->bitmap.rows; r++) {
+                if (x+c < 0 || x+c > W || y+r < 0 || y+r > H)
+                    continue;
+                pixel[(x+c)+W*(y+r)] += slot->bitmap.buffer[c + slot->bitmap.width*r];
+            }
+        }
+        x0 += slot->advance.x >> 6;
+        y0 += slot->advance.y >> 6;
+    }
+
+    // {
+    //     float x  = 0.;
+    //     float dy = 0., dx;
+    //     float scale;
+    //     int ascent, descent, baseln;
+    //     int adv, lsb, off, r0[2] = {0}, r1[2] = {0}, w, h, i, j, k ;
+
+    //     uchar *work;
+
+    //     font·vmetrics(info, &ascent, &descent, &baseln);
+    //     scale = font·scaleheightto(info, L);
+    //     for (i = 0; i < strlen(phrase); i++) {
+    //         dx = x - (float)floor(x);
+    //         font·code_hmetrics(info, phrase[i], &adv, &lsb);
+    //         font·code_bbox_subpixel(info, phrase[i], scale, scale, dx, 0, r0, r0+1, r1, r1+1);
+
+    //         y   = ascent + r0[1];
+    //         dy  = y - (float)floor(y);
+
+    //         w = r1[0]-r0[0];
+    //         h = r1[1]-r0[1];
+
+    //         work = calloc(w, h); 
+    //         font·code_fillbitmap_subpixel(info, work, w, h, w, scale, scale, dx, 0, phrase[i]);
+
+    //         off = (int)floor(x+10) + r0[0] + ((int)y-100) * W; 
+    //         for (j = 0; j < h; j++) {
+    //             for (k = 0; k < w; k++) {
+    //                 pixel[off + k + W*j] += work[k + w*j];
+    //             }
+    //         }
+    //         free(work);
+
+    //         x += scale * adv;
+    //         if (phrase[i+1])
+    //             x += scale * font·code_kernadvance(info, phrase[i], phrase[i+1]);
+    //     }
+    // }
+    stbi_write_png("out.png", W, H, 1, pixel, W);
+    
+    exit(0);
+}
 
+#if 0
 int
 main()
 {
@@ -77,3 +189,4 @@ end:
     mmap·close(fontfile);
     return err;
 }
+#endif
-- 
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