6 files changed, 49 insertions, 46 deletions

diff --git a/include/wlr/render.h b/include/wlr/render.h
index 9080175f..c3bf5c97 100644
--- a/include/wlr/render.h
+++ b/include/wlr/render.h
@@ -13,7 +13,7 @@ struct wlr_renderer;
 
 void wlr_renderer_begin(struct wlr_renderer *r, struct wlr_output *output);
 void wlr_renderer_end(struct wlr_renderer *r);
-void wlr_renderer_clear(struct wlr_renderer *r, const float (*color)[4]);
+void wlr_renderer_clear(struct wlr_renderer *r, const float color[static 4]);
 /**
  * Defines a scissor box. Only pixels that lie within the scissor box can be
  * modified by drawing functions. Providing a NULL `box` disables the scissor
@@ -30,26 +30,26 @@ struct wlr_texture *wlr_render_texture_create(struct wlr_renderer *r);
  *
  * 	struct wlr_renderer *renderer;
  * 	struct wlr_texture *texture;
- * 	float projection[16];
- * 	float matrix[16];
- * 	wlr_texture_get_matrix(texture, &matrix, &projection, 123, 321);
- * 	wlr_render_with_matrix(renderer, texture, &matrix, 0.5f);
+ * 	float projection[9];
+ * 	float matrix[9];
+ * 	wlr_texture_get_matrix(texture, matrix, projection, 123, 321);
+ * 	wlr_render_texture_with_matrix(renderer, texture, matrix, 0.5f);
  *
  * This will render the texture at <123, 321> with an alpha channel of 0.5.
  */
-bool wlr_render_with_matrix(struct wlr_renderer *r,
-	struct wlr_texture *texture, const float (*matrix)[16], float alpha);
+bool wlr_render_texture_with_matrix(struct wlr_renderer *r,
+	struct wlr_texture *texture, const float matrix[static 9], float alpha);
 
 /**
  * Renders a solid quad in the specified color.
  */
 void wlr_render_colored_quad(struct wlr_renderer *r,
-	const float (*color)[4], const float (*matrix)[16]);
+	const float color[static 4], const float matrix[static 9]);
 /**
  * Renders a solid ellipse in the specified color.
  */
 void wlr_render_colored_ellipse(struct wlr_renderer *r,
-	const float (*color)[4], const float (*matrix)[16]);
+	const float color[static 4], const float matrix[static 9]);
 /**
  * Returns a list of pixel formats supported by this renderer.
  */
@@ -142,8 +142,8 @@ bool wlr_texture_update_shm(struct wlr_texture *surf, uint32_t format,
  * width) and [0, height], and the x and y coordinates provided are used as
  * such.
  */
-void wlr_texture_get_matrix(struct wlr_texture *texture,
-		float (*matrix)[16], const float (*projection)[16], int x, int y);
+void wlr_texture_get_matrix(struct wlr_texture *texture, float mat[static 9],
+		const float projection[static 9], int x, int y);
 /**
  * Destroys this wlr_texture.
  */
diff --git a/include/wlr/render/interface.h b/include/wlr/render/interface.h
index 2ba584d9..c8b4c8eb 100644
--- a/include/wlr/render/interface.h
+++ b/include/wlr/render/interface.h
@@ -19,15 +19,16 @@ struct wlr_renderer {
 struct wlr_renderer_impl {
 	void (*begin)(struct wlr_renderer *renderer, struct wlr_output *output);
 	void (*end)(struct wlr_renderer *renderer);
-	void (*clear)(struct wlr_renderer *renderer, const float (*color)[4]);
+	void (*clear)(struct wlr_renderer *renderer, const float color[static 4]);
 	void (*scissor)(struct wlr_renderer *renderer, struct wlr_box *box);
 	struct wlr_texture *(*texture_create)(struct wlr_renderer *renderer);
-	bool (*render_with_matrix)(struct wlr_renderer *renderer,
-		struct wlr_texture *texture, const float (*matrix)[16], float alpha);
+	bool (*render_texture_with_matrix)(struct wlr_renderer *renderer,
+		struct wlr_texture *texture, const float matrix[static 9],
+		float alpha);
 	void (*render_quad)(struct wlr_renderer *renderer,
-		const float (*color)[4], const float (*matrix)[16]);
+		const float color[static 4], const float matrix[static 9]);
 	void (*render_ellipse)(struct wlr_renderer *renderer,
-		const float (*color)[4], const float (*matrix)[16]);
+		const float color[static 4], const float matrix[static 9]);
 	const enum wl_shm_format *(*formats)(
 		struct wlr_renderer *renderer, size_t *len);
 	bool (*buffer_is_drm)(struct wlr_renderer *renderer,
@@ -61,8 +62,8 @@ struct wlr_texture_impl {
 		uint32_t width, uint32_t height);
 	bool (*upload_dmabuf)(struct wlr_texture *texture,
 		struct wl_resource *dmabuf_resource);
-	void (*get_matrix)(struct wlr_texture *state,
-		float (*matrix)[16], const float (*projection)[16], int x, int y);
+	void (*get_matrix)(struct wlr_texture *state, float mat[static 9],
+		const float projection[static 9], int x, int y);
 	void (*get_buffer_size)(struct wlr_texture *texture,
 		struct wl_resource *resource, int *width, int *height);
 	void (*bind)(struct wlr_texture *texture);
diff --git a/include/wlr/render/matrix.h b/include/wlr/render/matrix.h
deleted file mode 100644
index a333bf0f..00000000
--- a/include/wlr/render/matrix.h
+++ /dev/null
@@ -1,22 +0,0 @@
-#ifndef WLR_RENDER_MATRIX_H
-#define WLR_RENDER_MATRIX_H
-
-#include <stdint.h>
-#include <wlr/types/wlr_box.h>
-
-void wlr_matrix_identity(float (*output)[16]);
-void wlr_matrix_translate(float (*output)[16], float x, float y, float z);
-void wlr_matrix_scale(float (*output)[16], float x, float y, float z);
-void wlr_matrix_rotate(float (*output)[16], float radians);
-void wlr_matrix_mul(const float (*x)[16], const float (*y)[16], float (*product)[16]);
-
-enum wl_output_transform;
-void wlr_matrix_transform(float mat[static 16],
-		enum wl_output_transform transform);
-void wlr_matrix_texture(float mat[static 16], int32_t width, int32_t height,
-		enum wl_output_transform transform);
-void wlr_matrix_project_box(float (*mat)[16], struct wlr_box *box,
-		enum wl_output_transform transform, float rotation, float
-		(*projection)[16]);
-
-#endif
diff --git a/include/wlr/types/wlr_matrix.h b/include/wlr/types/wlr_matrix.h
new file mode 100644
index 00000000..5255980a
--- /dev/null
+++ b/include/wlr/types/wlr_matrix.h
@@ -0,0 +1,23 @@
+#ifndef WLR_TYPES_WLR_MATRIX_H
+#define WLR_TYPES_WLR_MATRIX_H
+
+#include <stdint.h>
+#include <wayland-server.h>
+#include <wlr/types/wlr_box.h>
+
+void wlr_matrix_identity(float mat[static 9]);
+void wlr_matrix_translate(float mat[static 9], float x, float y);
+void wlr_matrix_scale(float mat[static 9], float x, float y);
+void wlr_matrix_rotate(float mat[static 9], float rad);
+void wlr_matrix_multiply(float mat[static 9], const float a[static 9],
+	const float b[static 9]);
+void wlr_matrix_transform(float mat[static 9],
+	enum wl_output_transform transform);
+
+void wlr_matrix_texture(float mat[static 9], int32_t width, int32_t height,
+	enum wl_output_transform transform);
+void wlr_matrix_project_box(float mat[static 9], const struct wlr_box *box,
+	enum wl_output_transform transform, float rotation,
+	const float projection[static 9]);
+
+#endif
diff --git a/include/wlr/types/wlr_output.h b/include/wlr/types/wlr_output.h
index a8138a80..b838a737 100644
--- a/include/wlr/types/wlr_output.h
+++ b/include/wlr/types/wlr_output.h
@@ -76,7 +76,7 @@ struct wlr_output {
 	// damage for cursors and fullscreen surface, in output-local coordinates
 	pixman_region32_t damage;
 	bool frame_pending;
-	float transform_matrix[16];
+	float transform_matrix[9];
 
 	struct {
 		struct wl_signal frame;
diff --git a/include/wlr/types/wlr_surface.h b/include/wlr/types/wlr_surface.h
index 203345bd..2bfd1bc9 100644
--- a/include/wlr/types/wlr_surface.h
+++ b/include/wlr/types/wlr_surface.h
@@ -70,8 +70,8 @@ struct wlr_surface {
 	struct wlr_surface_state *current, *pending;
 	const char *role; // the lifetime-bound role or null
 
-	float buffer_to_surface_matrix[16];
-	float surface_to_buffer_matrix[16];
+	float buffer_to_surface_matrix[9];
+	float surface_to_buffer_matrix[9];
 
 	struct {
 		struct wl_signal commit;
@@ -99,6 +99,7 @@ struct wlr_surface {
 struct wlr_renderer;
 struct wlr_surface *wlr_surface_create(struct wl_resource *res,
 		struct wlr_renderer *renderer);
+
 /**
  * Gets a matrix you can pass into wlr_render_with_matrix to display this
  * surface. `matrix` is the output matrix, `projection` is the wlr_output
@@ -108,9 +109,9 @@ struct wlr_surface *wlr_surface_create(struct wl_resource *res,
  * from 0 to 1 in both dimensions.
  */
 void wlr_surface_get_matrix(struct wlr_surface *surface,
-		float (*matrix)[16],
-		const float (*projection)[16],
-		const float (*transform)[16]);
+		float mat[static 9],
+		const float projection[static 9],
+		const float transform[static 9]);
 
 
 /**