Properly get proxy texture size for canvas light, fixes #17067

drivers/dummy/rasterizer_dummy.h

@@ -241,6 +241,7 @@ public:
 	void textures_keep_original(bool p_enable) {}
 
 	void texture_set_proxy(RID p_proxy, RID p_base) {}
+	virtual Size2 texture_size_with_proxy(RID p_texture) const { return Size2(); }
 	void texture_set_force_redraw_if_visible(RID p_texture, bool p_enable) {}
 
 	/* SKY API */

drivers/gles2/rasterizer_storage_gles2.cpp

@@ -846,6 +846,17 @@ void RasterizerStorageGLES2::textures_keep_original(bool p_enable) {
 	config.keep_original_textures = p_enable;
 }
 
+Size2 RasterizerStorageGLES2::texture_size_with_proxy(RID p_texture) const {
+
+	const Texture *texture = texture_owner.getornull(p_texture);
+	ERR_FAIL_COND_V(!texture, Size2());
+	if (texture->proxy) {
+		return Size2(texture->proxy->width, texture->proxy->height);
+	} else {
+		return Size2(texture->width, texture->height);
+	}
+}
+
 void RasterizerStorageGLES2::texture_set_proxy(RID p_texture, RID p_proxy) {
 	Texture *texture = texture_owner.getornull(p_texture);
 	ERR_FAIL_COND(!texture);

drivers/gles2/rasterizer_storage_gles2.h

@@ -342,6 +342,7 @@ public:
 	virtual void textures_keep_original(bool p_enable);
 
 	virtual void texture_set_proxy(RID p_texture, RID p_proxy);
+	virtual Size2 texture_size_with_proxy(RID p_texture) const;
 
 	virtual void texture_set_detect_3d_callback(RID p_texture, VisualServer::TextureDetectCallback p_callback, void *p_userdata);
 	virtual void texture_set_detect_srgb_callback(RID p_texture, VisualServer::TextureDetectCallback p_callback, void *p_userdata);

drivers/gles3/rasterizer_storage_gles3.cpp

@@ -1687,6 +1687,17 @@ RID RasterizerStorageGLES3::texture_create_radiance_cubemap(RID p_source, int p_
 	return texture_owner.make_rid(ctex);
 }
 
+Size2 RasterizerStorageGLES3::texture_size_with_proxy(RID p_texture) const {
+
+	const Texture *texture = texture_owner.getornull(p_texture);
+	ERR_FAIL_COND_V(!texture, Size2());
+	if (texture->proxy) {
+		return Size2(texture->proxy->width, texture->proxy->height);
+	} else {
+		return Size2(texture->width, texture->height);
+	}
+}
+
 void RasterizerStorageGLES3::texture_set_proxy(RID p_texture, RID p_proxy) {
 
 	Texture *texture = texture_owner.get(p_texture);

drivers/gles3/rasterizer_storage_gles3.h

@@ -375,6 +375,8 @@ public:
 	virtual void texture_set_detect_normal_callback(RID p_texture, VisualServer::TextureDetectCallback p_callback, void *p_userdata);
 
 	virtual void texture_set_proxy(RID p_texture, RID p_proxy);
+	virtual Size2 texture_size_with_proxy(RID p_texture) const;
+
 	virtual void texture_set_force_redraw_if_visible(RID p_texture, bool p_enable);
 
 	/* SKY API */

servers/visual/rasterizer.h

@@ -221,6 +221,7 @@ public:
 	virtual void textures_keep_original(bool p_enable) = 0;
 
 	virtual void texture_set_proxy(RID p_proxy, RID p_base) = 0;
+	virtual Size2 texture_size_with_proxy(RID p_texture) const = 0;
 	virtual void texture_set_force_redraw_if_visible(RID p_texture, bool p_enable) = 0;
 
 	/* SKY API */

servers/visual/visual_server_viewport.cpp

@@ -97,7 +97,7 @@ void VisualServerViewport::_draw_viewport(Viewport *p_viewport, ARVRInterface::E
 				RasterizerCanvas::Light *cl = F->get();
 				if (cl->enabled && cl->texture.is_valid()) {
 					//not super efficient..
-					Size2 tsize(VSG::storage->texture_get_width(cl->texture), VSG::storage->texture_get_height(cl->texture));
+					Size2 tsize = VSG::storage->texture_size_with_proxy(cl->texture);
 					tsize *= cl->scale;
 
 					Vector2 offset = tsize / 2.0;