fix: resolve texture before using size in CImage constructor (#426)

Move texture detection earlier in the constructor to ensure the texture
is available when determining image dimensions. Add fallback logic to use
texture or model dimensions when wallpaper size is not specified.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude <noreply@anthropic.com>

src/WallpaperEngine/Render/Objects/CImage.cpp

@@ -43,6 +43,42 @@ CImage::CImage (Wallpapers::CScene& scene, const Image& image) :
     glm::vec2 size = this->getSize ();
     glm::vec3 scale = this->getImage ().scale->value->getVec3 ();
 
+    // detect texture (if any)
+
+    if (auto textures = (*this->m_image.model->material->passes.begin ())->textures; !textures.empty ()) {
+        std::string textureName = textures.begin ()->second;
+
+        if (textureName.find ("_rt_") == 0 || textureName.find ("_alias_") == 0) {
+            this->m_texture = this->getScene ().findFBO (textureName);
+        } else {
+            // get the first texture on the first pass (this one represents the image assigned to this object)
+            this->m_texture = this->getContext ().resolveTexture (textureName);
+        }
+    } else {
+        if (this->m_image.model->solidlayer) {
+            size.x = scene_width;
+            size.y = scene_height;
+        }
+        // if (this->m_image->isSolid ()) // layer receives cursor events: https://docs.wallpaperengine.io/en/scene/scenescript/reference/event/cursor.html
+        // same applies to effects
+        // TODO: create a dummy texture of correct size, fbo constructors should be enough, but this should be properly
+        // handled
+        this->m_texture = std::make_shared<CFBO> (
+            "", TextureFormat_ARGB8888, TextureFlags_NoFlags, 1, size.x,
+                  size.y, size.x, size.y);
+    }
+
+    // If the wallpaper doesn't specify a size, fall back to the texture or model dimensions
+    if ((size.x == 0.0f || size.y == 0.0f) && this->m_texture != nullptr) {
+        size.x = static_cast<float> (this->m_texture->getRealWidth ());
+        size.y = static_cast<float> (this->m_texture->getRealHeight ());
+    } else if ((size.x == 0.0f || size.y == 0.0f) &&
+               this->getImage ().model->width.has_value () &&
+               this->getImage ().model->height.has_value ()) {
+        size.x = static_cast<float> (this->getImage ().model->width.value ());
+        size.y = static_cast<float> (this->getImage ().model->height.value ());
+    }
+
     // fullscreen layers should use the whole projection's size
     // TODO: WHAT SHOULD AUTOSIZE DO?
     if (this->getImage ().model->fullscreen) {
@@ -82,31 +118,6 @@ CImage::CImage (Wallpapers::CScene& scene, const Image& image) :
     this->m_pos.z -= scene_width / 2;
     this->m_pos.w = scene_height / 2 - this->m_pos.w;
 
-    // detect texture (if any)
-
-    if (auto textures = (*this->m_image.model->material->passes.begin ())->textures; !textures.empty ()) {
-        std::string textureName = textures.begin ()->second;
-
-        if (textureName.find ("_rt_") == 0 || textureName.find ("_alias_") == 0) {
-            this->m_texture = this->getScene ().findFBO (textureName);
-        } else {
-            // get the first texture on the first pass (this one represents the image assigned to this object)
-            this->m_texture = this->getContext ().resolveTexture (textureName);
-        }
-    } else {
-        if (this->m_image.model->solidlayer) {
-            size.x = scene_width;
-            size.y = scene_height;
-        }
-        // if (this->m_image->isSolid ()) // layer receives cursor events: https://docs.wallpaperengine.io/en/scene/scenescript/reference/event/cursor.html
-        // same applies to effects
-        // TODO: create a dummy texture of correct size, fbo constructors should be enough, but this should be properly
-        // handled
-        this->m_texture = std::make_shared<CFBO> (
-            "", TextureFormat_ARGB8888, TextureFlags_NoFlags, 1, size.x,
-                  size.y, size.x, size.y);
-    }
-
     // register both FBOs into the scene
     std::ostringstream nameA, nameB;