From 9124eea8746cd3441245f3194e9d3cb78db4f9db Mon Sep 17 00:00:00 2001
From: Fabrice <fabrice@schaub-dev.xyz>
Date: Thu, 12 Feb 2026 00:26:51 +0100
Subject: creating quads

---
 src/text.cc | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 55 insertions(+), 2 deletions(-)

diff --git a/src/text.cc b/src/text.cc
index ab812c2..603e6fb 100644
--- a/src/text.cc
+++ b/src/text.cc
@@ -114,6 +114,11 @@ enum font_error_e wayc_font_lookup(struct font_s* font, struct atlas_s* atlas,
   glyph.bearing_y = slot->bitmap_top;
   glyph.advance = (f32)slot->advance.x / WAYC_SCALE;
 
+  glyph.uv0[0] = uv0[0];
+  glyph.uv0[1] = uv0[1];
+  glyph.uv1[0] = uv0[0] + size[0];
+  glyph.uv1[1] = uv0[1] + size[1];
+
   wayc_font_cache_insert(font, codepoint, glyph);
 
   *out = glyph;
@@ -128,6 +133,41 @@ void wayc_font_deinit(struct font_s* font) {
   mi_free(font->data);
 }
 
+static void wayc_text_assemble_one(const struct glyph_s* glyph, vec2* pen,
+                                   f32 atlas_width, f32 atlas_height,
+                                   struct text_vertex_s* out_verts,
+                                   text_index_t* out_indices) {
+  wayc_notnull(glyph);
+  wayc_notnull(pen);
+  wayc_notnull(out_verts);
+  wayc_notnull(out_indices);
+
+  const f32 left = WAYC_X(*pen) + glyph->bearing_x;
+  const f32 top = WAYC_Y(*pen) - glyph->bearing_y;
+  const f32 right = left + (WAYC_X(glyph->uv1) - WAYC_X(glyph->uv0));
+  const f32 bottom = top + (WAYC_Y(glyph->uv1) - WAYC_Y(glyph->uv0));
+
+  const f32 uv_left = (f32)WAYC_X(glyph->uv0) / atlas_width;
+  const f32 uv_top = (f32)WAYC_Y(glyph->uv0) / atlas_height;
+  const f32 uv_right = (f32)WAYC_X(glyph->uv1) / atlas_width;
+  const f32 uv_bottom = (f32)WAYC_Y(glyph->uv1) / atlas_height;
+
+  struct quad_s quad;
+  wayc_quad_init(&quad, left, top, right, bottom);
+
+  out_verts[0] = text_vertex_s{{left, top}, {uv_left, uv_top}};
+  out_verts[1] = text_vertex_s{{right, top}, {uv_right, uv_top}};
+  out_verts[2] = text_vertex_s{{right, bottom}, {uv_right, uv_bottom}};
+  out_verts[3] = text_vertex_s{{left, bottom}, {uv_left, uv_bottom}};
+
+  out_indices[0] = 0;
+  out_indices[1] = 1;
+  out_indices[2] = 2;
+  out_indices[3] = 2;
+  out_indices[4] = 3;
+  out_indices[5] = 0;
+}
+
 enum text_error_e wayc_text_assemble(struct text_s* text, usize* out_size,
                                      text_index_t** out_indices,
                                      struct text_vertex_s** out_verts) {
@@ -154,6 +194,7 @@ enum text_error_e wayc_text_assemble(struct text_s* text, usize* out_size,
   text_index_t* indices = (text_index_t*)mi_malloc(index_bytes);
   wayc_defer_cond(mi_free(indices), success, true);
 
+  vec2 pen = {0, 0};
   for (usize i = 0; i < glyph_count; i++) {
     codepoint_t codepoint = text->string.data[i];
     struct glyph_s glyph;
@@ -161,10 +202,22 @@ enum text_error_e wayc_text_assemble(struct text_s* text, usize* out_size,
                                              text->packer, codepoint, &glyph);
     if (err != FONT_ERROR_NONE) return TEXT_ERROR_ATLAS;
 
-    wayc_panic("unimplemented");
+    f32 atlas_width = (f32)text->atlas->width;
+    f32 atlas_height = (f32)text->atlas->height;
+
+    usize vertex_offset = i * WAYC_LETTER_NVERTICES;
+    usize index_offset = i * WAYC_LETTER_NTRIANGLES * WAYC_TRIANGLE_NINDICES;
+
+    struct text_vertex_s* vertices_writer = &vertices[vertex_offset];
+    text_index_t* indices_writer = &indices[index_offset];
+
+    wayc_text_assemble_one(&glyph, &pen, atlas_width, atlas_height,
+                           vertices_writer, indices_writer);
+
+    pen[0] += glyph.advance;
   }
 
-  *out_size = index_bytes;
+  *out_size = index_count;
   *out_indices = indices;
   *out_verts = vertices;
 
-- 
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