render: add wlr_render_subtexture_with_matrix

This renders only a subset of the texture, instead of the full texture.

2 files changed, 10 insertions, 3 deletions

diff --git a/include/wlr/render/interface.h b/include/wlr/render/interface.h
index 6eb6c22f..93c987b7 100644
--- a/include/wlr/render/interface.h
+++ b/include/wlr/render/interface.h
@@ -32,9 +32,9 @@ struct wlr_renderer_impl {
 	void (*end)(struct wlr_renderer *renderer);
 	void (*clear)(struct wlr_renderer *renderer, const float color[static 4]);
 	void (*scissor)(struct wlr_renderer *renderer, struct wlr_box *box);
-	bool (*render_texture_with_matrix)(struct wlr_renderer *renderer,
-		struct wlr_texture *texture, const float matrix[static 9],
-		float alpha);
+	bool (*render_subtexture_with_matrix)(struct wlr_renderer *renderer,
+		struct wlr_texture *texture, const struct wlr_fbox *box,
+		const float matrix[static 9], float alpha);
 	void (*render_quad_with_matrix)(struct wlr_renderer *renderer,
 		const float color[static 4], const float matrix[static 9]);
 	void (*render_ellipse_with_matrix)(struct wlr_renderer *renderer,
diff --git a/include/wlr/render/wlr_renderer.h b/include/wlr/render/wlr_renderer.h
index e6140f3e..513f412a 100644
--- a/include/wlr/render/wlr_renderer.h
+++ b/include/wlr/render/wlr_renderer.h
@@ -55,6 +55,13 @@ bool wlr_render_texture(struct wlr_renderer *r, struct wlr_texture *texture,
 bool wlr_render_texture_with_matrix(struct wlr_renderer *r,
 	struct wlr_texture *texture, const float matrix[static 9], float alpha);
 /**
+ * Renders the requested texture using the provided matrix, after cropping it
+ * to the provided rectangle.
+ */
+bool wlr_render_subtexture_with_matrix(struct wlr_renderer *r,
+	struct wlr_texture *texture, const struct wlr_fbox *box,
+	const float matrix[static 9], float alpha);
+/**
  * Renders a solid rectangle in the specified color.
  */
 void wlr_render_rect(struct wlr_renderer *r, const struct wlr_box *box,