rasterizing and caching

1 files changed, 31 insertions, 5 deletions

diff --git a/src/text.cc b/src/text.cc
index b703ad1..6de3506 100644
--- a/src/text.cc
+++ b/src/text.cc
@@ -4,7 +4,10 @@
 #include <cstring>
 
 #include "atlas.h"
+#include "cglm/types.h"
+#include "cglm/vec2.h"
 #include "freetype/freetype.h"
+#include "freetype/fttypes.h"
 #include "hash.h"
 #include "shaders.h"
 #include "utils.h"
@@ -124,9 +127,10 @@ enum font_error_e wayc_font_init(struct font_s* font,
   FT_Face face;
   FT_Error fterr = FT_New_Face(context->ft, path, 0, &face);
   if (fterr) return FONT_ERROR_LOAD_FACE;
-
   wayc_defer_cond(FT_Done_Face(face), success, true);
 
+  FT_Set_Pixel_Sizes(face, 0, font_size);
+
   struct atlas_s atlas;
   enum atlas_error_e aterr =
       wayc_atlas_init(&atlas, atlas_width, atlas_height, SG_PIXELFORMAT_R8);
@@ -146,14 +150,36 @@ enum font_error_e wayc_font_render(struct font_s* font, codepoint_t codepoint,
   wayc_notnull(font);
   wayc_notnull(glyph);
 
-  struct glyph_s cached;
-  if (wayc_hashmap_get(&font->cached, &codepoint, &cached)) {
-    *glyph = cached;
+  struct glyph_s got;
+  if (wayc_hashmap_get(&font->cached, &codepoint, &got)) {
+    *glyph = got;
     return FONT_ERROR_NONE;
   }
 
-  
+  u32 index = FT_Get_Char_Index(font->face, codepoint);
+  if (index == 0) return FONT_ERROR_LOAD_GLYPH;
+
+  FT_Error fterr = FT_Load_Glyph(font->face, index, FT_LOAD_RENDER);
+  if (fterr) return FONT_ERROR_LOAD_GLYPH;
+
+  FT_GlyphSlot slot = font->face->glyph;
+  FT_Bitmap bitmap = slot->bitmap;
+
+  vec2 uv0, uv1;
+
+  enum atlas_error_e aterr = wayc_atlas_insert(
+      &font->atlas, bitmap.width, bitmap.rows, bitmap.buffer, &uv0, &uv1);
+  if (aterr) return FONT_ERROR_ATLAS_FAILED;
+
+  vec2 bearing = {(f32)slot->bitmap_left, (f32)slot->bitmap_top};
+  f32 advance = (f32)slot->advance.x / WAYC_SCALE;
+
+  glm_vec2_copy(uv0, got.uv0);
+  glm_vec2_copy(uv1, got.uv1);
+  glm_vec2_copy(bearing, got.bearing);
+  got.advance = advance;
 
+  wayc_hashmap_insert(&font->cached, &codepoint, &got);
   return FONT_ERROR_NONE;
 }