From 952dc19e0eeec2b0ba695970ac3f5a2997e39c77 Mon Sep 17 00:00:00 2001
From: Fabrice <fabrice@schaub-dev.xyz>
Date: Wed, 11 Feb 2026 21:44:49 +0100
Subject: working on atlas

---
 src/rendering.cc | 17 ++++++++++++-----
 src/rendering.h  |  7 +++++--
 src/text.cc      |  4 ++--
 src/text.h       |  5 +++--
 src/wayclock.cc  |  3 ++-
 5 files changed, 24 insertions(+), 12 deletions(-)

diff --git a/src/rendering.cc b/src/rendering.cc
index 356c6b3..8044688 100644
--- a/src/rendering.cc
+++ b/src/rendering.cc
@@ -4,7 +4,6 @@
 
 #include <cstring>
 
-#include "cglm/ivec2.h"
 #include "utils.h"
 
 bool wayc_image_init(texture_t* texture, image_type_e type,
@@ -74,15 +73,15 @@ void wayc_sampler_use(sampler_t sampler, u32 slot) {
 
 void wayc_sampler_deinit(sampler_t* sampler) { glDeleteSamplers(1, sampler); }
 
-bool wayc_atlas_init(atlas_s* atlas, u32 width, u32 height) {
+bool wayc_atlas_init(atlas_s* atlas, image_format_e format, u32 width,
+                     u32 height) {
   wayc_notnull(atlas);
   memset(atlas, 0, sizeof(*atlas));
 
   bool success = false;
 
   texture_t texture;
-  bool ok = wayc_image_init(&texture, IMAGE_TYPE_2D, IMAGE_FORMAT_RGBA, width,
-                            height);
+  bool ok = wayc_image_init(&texture, IMAGE_TYPE_2D, format, width, height);
   if (!ok) return false;
   wayc_defer_cond(wayc_image_deinit(&texture);, success, true);
 
@@ -95,7 +94,6 @@ bool wayc_atlas_init(atlas_s* atlas, u32 width, u32 height) {
   atlas->sampler = sampler;
   atlas->width = width;
   atlas->height = height;
-  glm_ivec2_zero(atlas->cursor);
 
   success = true;
   return true;
@@ -106,6 +104,15 @@ void wayc_atlas_use(atlas_s* atlas, u32 slot) {
   wayc_sampler_use(atlas->sampler, slot);
 }
 
+void wayc_atlas_set(atlas_s* atlas, image_data_type_e data_type, ivec2 offset,
+                    u32 width, u32 height, const u8* data) {
+  wayc_notnull(atlas);
+  wayc_notnull(data);
+
+  wayc_image_upload(atlas->texture, offset, width, height, IMAGE_TYPE_2D,
+                    IMAGE_FORMAT_RGBA, data_type, data);
+}
+
 void wayc_atlas_deinit(atlas_s* atlas) {
   wayc_notnull(atlas);
   wayc_sampler_deinit(&atlas->sampler);
diff --git a/src/rendering.h b/src/rendering.h
index b70d366..8927eff 100644
--- a/src/rendering.h
+++ b/src/rendering.h
@@ -55,10 +55,13 @@ void wayc_sampler_deinit(sampler_t* sampler);
 struct atlas_s {
   texture_t texture;
   sampler_t sampler;
-  ivec2 cursor;
   u32 width, height;
+  image_format_e format;
 };
 
-bool wayc_atlas_init(atlas_s* atlas, u32 width, u32 height);
+bool wayc_atlas_init(atlas_s* atlas, image_format_e format, u32 width,
+                     u32 height);
 void wayc_atlas_use(atlas_s* atlas, u32 slot);
+void wayc_atlas_set(atlas_s* atlas, image_data_type_e data_type, ivec2 offset,
+                    u32 width, u32 height, const u8* data);
 void wayc_atlas_deinit(atlas_s* atlas);
diff --git a/src/text.cc b/src/text.cc
index d209ed2..21cee19 100644
--- a/src/text.cc
+++ b/src/text.cc
@@ -70,8 +70,8 @@ enum font_error_e wayc_font_init(struct font_s* font,
   return FONT_ERROR_NONE;
 }
 
-enum font_error_e wayc_font_lookup(struct font_s* font, codepoint_t codepoint,
-                                   struct glyph_s* out) {
+enum font_error_e wayc_font_lookup(struct font_s* font, struct atlas_s* atlas,
+                                   codepoint_t codepoint, struct glyph_s* out) {
   wayc_notnull(font);
   wayc_notnull(out);
 
diff --git a/src/text.h b/src/text.h
index e507221..a3ed9d1 100644
--- a/src/text.h
+++ b/src/text.h
@@ -2,6 +2,7 @@
 
 #include "freetype/freetype.h"
 #include "hash.h"
+#include "rendering.h"
 #include "utils.h"
 
 typedef u32 codepoint_t;
@@ -35,6 +36,6 @@ struct font_s {
 
 enum font_error_e wayc_font_init(struct font_s* font,
                                  struct font_context_s* ctx, const char* path);
-enum font_error_e wayc_font_lookup(struct font_s* font, codepoint_t codepoint,
-                                   struct glyph_s* out);
+enum font_error_e wayc_font_lookup(struct font_s* font, struct atlas_s* atlas,
+                                   codepoint_t codepoint, struct glyph_s* out);
 void wayc_font_deinit(struct font_s* font);
diff --git a/src/wayclock.cc b/src/wayclock.cc
index 43f07ab..a34a0b8 100644
--- a/src/wayclock.cc
+++ b/src/wayclock.cc
@@ -108,7 +108,8 @@ int main() {
   glClearColor(0.1f, 0.2f, 0.2f, 1.0f);
 
   struct atlas_s atlas;
-  if (!wayc_atlas_init(&atlas, WAYC_ATLAS_WIDTH, WAYC_ATLAS_HEIGHT))
+  if (!wayc_atlas_init(&atlas, IMAGE_FORMAT_RGBA, WAYC_ATLAS_WIDTH,
+                       WAYC_ATLAS_HEIGHT))
     wayc_panic("Failed to initialize atlas");
 
   wayc_defer(wayc_atlas_deinit(&atlas));
-- 
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