From 742d026479230a41f74956f040781547a6009021 Mon Sep 17 00:00:00 2001
From: msizanoen <msizanoen@qtmlabs.xyz>
Date: Mon, 5 Jun 2023 21:55:24 +0700
Subject: [PATCH] shaped-texture: Introduce get_unscaled_{width,height}

This allows other code to obtain the size of the surface after all
transformations except for scaling.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3053>
---
 src/compositor/meta-shaped-texture-private.h |  3 +
 src/compositor/meta-shaped-texture.c         | 62 ++++++++++++++++++++
 2 files changed, 65 insertions(+)

diff --git a/src/compositor/meta-shaped-texture-private.h b/src/compositor/meta-shaped-texture-private.h
index ff5f2fa96..f9f22f510 100644
--- a/src/compositor/meta-shaped-texture-private.h
+++ b/src/compositor/meta-shaped-texture-private.h
@@ -66,6 +66,9 @@ gboolean meta_shaped_texture_update_area (MetaShapedTexture     *stex,
 int meta_shaped_texture_get_width (MetaShapedTexture *stex);
 int meta_shaped_texture_get_height (MetaShapedTexture *stex);
 
+float meta_shaped_texture_get_unscaled_width (MetaShapedTexture *stex);
+float meta_shaped_texture_get_unscaled_height (MetaShapedTexture *stex);
+
 void meta_shaped_texture_set_clip_region (MetaShapedTexture *stex,
                                           cairo_region_t    *clip_region);
 void meta_shaped_texture_set_opaque_region (MetaShapedTexture *stex,
diff --git a/src/compositor/meta-shaped-texture.c b/src/compositor/meta-shaped-texture.c
index 7f594a5d8..8eaf3238b 100644
--- a/src/compositor/meta-shaped-texture.c
+++ b/src/compositor/meta-shaped-texture.c
@@ -1491,3 +1491,65 @@ meta_shaped_texture_get_height (MetaShapedTexture *stex)
 
   return stex->dst_height;
 }
+
+static graphene_size_t
+get_unscaled_size (MetaShapedTexture *stex)
+{
+  graphene_size_t buffer_size;
+
+  if (stex->has_viewport_src_rect)
+    {
+      graphene_size_scale (&stex->viewport_src_rect.size,
+                           stex->buffer_scale,
+                           &buffer_size);
+    }
+  else
+    {
+      buffer_size = (graphene_size_t) {
+        .width = stex->tex_width,
+        .height = stex->tex_height,
+      };
+    }
+
+  if (meta_monitor_transform_is_rotated (stex->transform))
+    {
+      return (graphene_size_t) {
+        .width = buffer_size.height,
+        .height = buffer_size.width,
+      };
+    }
+  else
+    {
+      return buffer_size;
+    }
+}
+
+/**
+ * meta_shaped_texture_get_unscaled_width:
+ * @stex: A #MetaShapedTexture
+ *
+ * Returns: The unscaled width of @stex after its shaping operations are applied.
+ */
+float
+meta_shaped_texture_get_unscaled_width (MetaShapedTexture *stex)
+{
+  g_return_val_if_fail (META_IS_SHAPED_TEXTURE (stex), 0);
+  graphene_size_t unscaled_size = get_unscaled_size (stex);
+
+  return unscaled_size.width;
+}
+
+/**
+ * meta_shaped_texture_get_unscaled_height:
+ * @stex: A #MetaShapedTexture
+ *
+ * Returns: The unscaled height of @stex after its shaping operations are applied.
+ */
+float
+meta_shaped_texture_get_unscaled_height (MetaShapedTexture *stex)
+{
+  g_return_val_if_fail (META_IS_SHAPED_TEXTURE (stex), 0);
+  graphene_size_t unscaled_size = get_unscaled_size (stex);
+
+  return unscaled_size.height;
+}