Merge pull request #722 from emersion/matrix-redesign

Matrix redesign

backend/drm/drm.c

@@ -17,7 +17,7 @@
 #include <wlr/interfaces/wlr_output.h>
 #include <wlr/render.h>
 #include <wlr/render/gles2.h>
-#include <wlr/render/matrix.h>
+#include <wlr/types/wlr_matrix.h>
 #include <wlr/util/log.h>
 #include <xf86drm.h>
 #include <xf86drmMode.h>
@@ -587,8 +587,8 @@ static bool wlr_drm_connector_set_cursor(struct wlr_output *output,
 		enum wl_output_transform transform = wlr_output_transform_compose(
 			wlr_output_transform_invert(output->transform),
 			WL_OUTPUT_TRANSFORM_FLIPPED_180);
-		wlr_matrix_texture(plane->matrix, plane->surf.width, plane->surf.height,
+		wlr_matrix_projection(plane->matrix, plane->surf.width,
-			transform);
+			plane->surf.height, transform);
 
 		plane->wlr_tex =
 			wlr_render_texture_create(plane->surf.renderer->wlr_rend);
@@ -647,10 +647,8 @@ static bool wlr_drm_connector_set_cursor(struct wlr_output *output,
 		glClearColor(0.0, 0.0, 0.0, 0.0);
 		glClear(GL_COLOR_BUFFER_BIT);
 
-		float matrix[16];
+		wlr_render_texture(plane->surf.renderer->wlr_rend, plane->wlr_tex,
-		wlr_texture_get_matrix(plane->wlr_tex, &matrix, &plane->matrix, 0, 0);
+			plane->matrix, 0, 0, 1.0f);
-		wlr_render_with_matrix(plane->surf.renderer->wlr_rend, plane->wlr_tex,
-			&matrix, 1.0f);
 
 		glFinish();
 		glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, bo_stride);

backend/drm/renderer.c

@@ -1,3 +1,4 @@
+#include <assert.h>
 #include <EGL/egl.h>
 #include <EGL/eglext.h>
 #include <gbm.h>
@@ -9,7 +10,7 @@
 #include <wlr/render.h>
 #include <wlr/render/egl.h>
 #include <wlr/render/gles2.h>
-#include <wlr/render/matrix.h>
+#include <wlr/types/wlr_matrix.h>
 #include <wlr/util/log.h>
 #include "backend/drm/drm.h"
 #include "glapi.h"
@@ -226,20 +227,21 @@ struct gbm_bo *wlr_drm_surface_mgpu_copy(struct wlr_drm_surface *dest,
 	wlr_drm_surface_make_current(dest, NULL);
 
 	struct wlr_texture *tex = get_tex_for_bo(dest->renderer, src);
+	assert(tex);
 
-	static const float matrix[16] = {
+	static const float color[] = {0.0, 0.0, 0.0, 1.0};
+
+	static const float mat[9] = {
 		[0] = 2.0f,
-		[3] = -1.0f,
+		[2] = -1.0f,
-		[5] = 2.0f,
+		[4] = 2.0f,
-		[7] = -1.0f,
+		[5] = -1.0f,
-		[10] = 1.0f,
+		[8] = 1.0f,
-		[15] = 1.0f,
 	};
 
 	glViewport(0, 0, dest->width, dest->height);
-	glClearColor(0.0, 0.0, 0.0, 1.0);
+	wlr_renderer_clear(dest->renderer->wlr_rend, color);
-	glClear(GL_COLOR_BUFFER_BIT);
+	wlr_render_texture_with_matrix(dest->renderer->wlr_rend, tex, mat, 1.0f);
-	wlr_render_with_matrix(dest->renderer->wlr_rend, tex, &matrix, 1.0f);
 
 	return wlr_drm_surface_swap_buffers(dest, NULL);
 }

examples/multi-pointer.c

@@ -11,7 +11,7 @@
 #include <wayland-server-protocol.h>
 #include <xkbcommon/xkbcommon.h>
 #include <GLES2/gl2.h>
-#include <wlr/render/matrix.h>
+#include <wlr/types/wlr_matrix.h>
 #include <wlr/render/gles2.h>
 #include <wlr/render.h>
 #include <wlr/backend.h>

examples/output-layout.c

@@ -11,7 +11,7 @@
 #include <wayland-server-protocol.h>
 #include <xkbcommon/xkbcommon.h>
 #include <GLES2/gl2.h>
-#include <wlr/render/matrix.h>
+#include <wlr/types/wlr_matrix.h>
 #include <wlr/render/gles2.h>
 #include <wlr/render.h>
 #include <wlr/util/log.h>
@@ -102,7 +102,7 @@ static void handle_output_frame(struct output_state *output,
 
 	wlr_output_make_current(wlr_output, NULL);
 	wlr_renderer_begin(sample->renderer, wlr_output);
-	wlr_renderer_clear(sample->renderer, &(float[]){0.25f, 0.25f, 0.25f, 1});
+	wlr_renderer_clear(sample->renderer, (float[]){0.25f, 0.25f, 0.25f, 1});
 
 	animate_cat(sample, output->output);
 
@@ -111,18 +111,14 @@ static void handle_output_frame(struct output_state *output,
 		.width = 128, .height = 128,
 	};
 	if (wlr_output_layout_intersects(sample->layout, output->output, &box)) {
-		float matrix[16];
-
 		// transform global coordinates to local coordinates
 		double local_x = sample->x_offs;
 		double local_y = sample->y_offs;
 		wlr_output_layout_output_coords(sample->layout, output->output,
 			&local_x, &local_y);
 
-		wlr_texture_get_matrix(sample->cat_texture, &matrix,
+		wlr_render_texture(sample->renderer, sample->cat_texture,
-			&wlr_output->transform_matrix, local_x, local_y);
+			wlr_output->transform_matrix, local_x, local_y, 1.0f);
-		wlr_render_with_matrix(sample->renderer,
-			sample->cat_texture, &matrix, 1.0f);
 	}
 
 	wlr_renderer_end(sample->renderer);

examples/pointer.c

@@ -11,7 +11,7 @@
 #include <wayland-server-protocol.h>
 #include <xkbcommon/xkbcommon.h>
 #include <GLES2/gl2.h>
-#include <wlr/render/matrix.h>
+#include <wlr/types/wlr_matrix.h>
 #include <wlr/render/gles2.h>
 #include <wlr/render.h>
 #include <wlr/backend.h>

examples/rotation.c

@@ -10,7 +10,7 @@
 #include <wayland-server-protocol.h>
 #include <xkbcommon/xkbcommon.h>
 #include <GLES2/gl2.h>
-#include <wlr/render/matrix.h>
+#include <wlr/types/wlr_matrix.h>
 #include <wlr/render/gles2.h>
 #include <wlr/render.h>
 #include <wlr/backend.h>
@@ -44,15 +44,12 @@ static void handle_output_frame(struct output_state *output, struct timespec *ts
 
 	wlr_output_make_current(wlr_output, NULL);
 	wlr_renderer_begin(sample->renderer, wlr_output);
-	wlr_renderer_clear(sample->renderer, &(float[]){0.25f, 0.25f, 0.25f, 1});
+	wlr_renderer_clear(sample->renderer, (float[]){0.25f, 0.25f, 0.25f, 1});
 
-	float matrix[16];
 	for (int y = -128 + (int)odata->y_offs; y < height; y += 128) {
 		for (int x = -128 + (int)odata->x_offs; x < width; x += 128) {
-			wlr_texture_get_matrix(sample->cat_texture, &matrix,
+			wlr_render_texture(sample->renderer, sample->cat_texture,
-				&wlr_output->transform_matrix, x, y);
+				wlr_output->transform_matrix, x, y, 1.0f);
-			wlr_render_with_matrix(sample->renderer,
-					sample->cat_texture, &matrix, 1.0f);
 		}
 	}
 

examples/tablet.c

@@ -9,7 +9,7 @@
 #include <wayland-server-protocol.h>
 #include <xkbcommon/xkbcommon.h>
 #include <GLES2/gl2.h>
-#include <wlr/render/matrix.h>
+#include <wlr/types/wlr_matrix.h>
 #include <wlr/render/gles2.h>
 #include <wlr/render.h>
 #include <wlr/backend.h>
@@ -47,9 +47,9 @@ static void handle_output_frame(struct output_state *output, struct timespec *ts
 
 	wlr_output_make_current(wlr_output, NULL);
 	wlr_renderer_begin(sample->renderer, wlr_output);
-	wlr_renderer_clear(sample->renderer, &(float[]){0.25f, 0.25f, 0.25f, 1});
+	wlr_renderer_clear(sample->renderer, (float[]){0.25f, 0.25f, 0.25f, 1});
 
-	float matrix[16];
+	float matrix[9];
 	float distance = 0.8f * (1 - sample->distance);
 	float tool_color[4] = { distance, distance, distance, 1 };
 	for (size_t i = 0; sample->button && i < 4; ++i) {
@@ -65,9 +65,8 @@ static void handle_output_frame(struct output_state *output, struct timespec *ts
 		.x = left, .y = top,
 		.width = pad_width, .height = pad_height,
 	};
-	wlr_matrix_project_box(&matrix, &box, 0, 0,
+	wlr_matrix_project_box(matrix, &box, 0, 0, wlr_output->transform_matrix);
-			&wlr_output->transform_matrix);
+	wlr_render_colored_quad(sample->renderer, sample->pad_color, matrix);
-	wlr_render_colored_quad(sample->renderer, &sample->pad_color, &matrix);
 
 	if (sample->proximity) {
 		struct wlr_box box = {
@@ -76,16 +75,16 @@ static void handle_output_frame(struct output_state *output, struct timespec *ts
 			.width = 16 * (sample->pressure + 1),
 			.height = 16 * (sample->pressure + 1),
 		};
-		wlr_matrix_project_box(&matrix, &box, 0, sample->ring,
+		wlr_matrix_project_box(matrix, &box, 0, sample->ring,
-				&wlr_output->transform_matrix);
+			wlr_output->transform_matrix);
-		wlr_render_colored_quad(sample->renderer, &tool_color, &matrix);
+		wlr_render_colored_quad(sample->renderer, tool_color, matrix);
 		box.x += sample->x_tilt;
 		box.y += sample->y_tilt;
 		box.width /= 2;
 		box.height /= 2;
-		wlr_matrix_project_box(&matrix, &box, 0, 0,
+		wlr_matrix_project_box(matrix, &box, 0, 0,
-				&wlr_output->transform_matrix);
+			wlr_output->transform_matrix);
-		wlr_render_colored_quad(sample->renderer, &tool_color, &matrix);
+		wlr_render_colored_quad(sample->renderer, tool_color, matrix);
 	}
 
 	wlr_renderer_end(sample->renderer);

examples/touch.c

@@ -11,7 +11,7 @@
 #include <wayland-server-protocol.h>
 #include <xkbcommon/xkbcommon.h>
 #include <GLES2/gl2.h>
-#include <wlr/render/matrix.h>
+#include <wlr/types/wlr_matrix.h>
 #include <wlr/render/gles2.h>
 #include <wlr/render.h>
 #include <wlr/backend.h>
@@ -43,17 +43,14 @@ static void handle_output_frame(struct output_state *output, struct timespec *ts
 
 	wlr_output_make_current(wlr_output, NULL);
 	wlr_renderer_begin(sample->renderer, wlr_output);
-	wlr_renderer_clear(sample->renderer, &(float[]){0.25f, 0.25f, 0.25f, 1});
+	wlr_renderer_clear(sample->renderer, (float[]){0.25f, 0.25f, 0.25f, 1});
 
-	float matrix[16];
 	struct touch_point *p;
 	wl_list_for_each(p, &sample->touch_points, link) {
-		wlr_texture_get_matrix(sample->cat_texture, &matrix,
+		int x = (int)(p->x * width) - sample->cat_texture->width / 2;
-			&wlr_output->transform_matrix,
+		int y = (int)(p->y * height) - sample->cat_texture->height / 2;
-			(int)(p->x * width) - sample->cat_texture->width / 2,
+		wlr_render_texture(sample->renderer, sample->cat_texture,
-			(int)(p->y * height) - sample->cat_texture->height / 2);
+			wlr_output->transform_matrix, x, y, 1.0f);
-		wlr_render_with_matrix(sample->renderer,
-			sample->cat_texture, &matrix, 1.0f);
 	}
 
 	wlr_renderer_end(sample->renderer);

include/backend/drm/drm.h

@@ -26,7 +26,7 @@ struct wlr_drm_plane {
 	struct wlr_drm_surface mgpu_surf;
 
 	// Only used by cursor
-	float matrix[16];
+	float matrix[9];
 	struct wlr_texture *wlr_tex;
 	struct gbm_bo *cursor_bo;
 	bool cursor_enabled;

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
@@ -25,31 +25,25 @@ void wlr_renderer_scissor(struct wlr_renderer *r, struct wlr_box *box);
  */
 struct wlr_texture *wlr_render_texture_create(struct wlr_renderer *r);
 /**
- * Renders the requested texture using the provided matrix. A typical texture
+ * Renders the requested texture.
- * rendering goes like so:
+ */
- *
+bool wlr_render_texture(struct wlr_renderer *r, struct wlr_texture *texture,
- * 	struct wlr_renderer *renderer;
+	const float projection[static 9], int x, int y, float alpha);
- * 	struct wlr_texture *texture;
+/**
- * 	float projection[16];
+ * Renders the requested texture using the provided matrix.
- * 	float matrix[16];
+ */
- * 	wlr_texture_get_matrix(texture, &matrix, &projection, 123, 321);
+bool wlr_render_texture_with_matrix(struct wlr_renderer *r,
- * 	wlr_render_with_matrix(renderer, texture, &matrix, 0.5f);
+	struct wlr_texture *texture, const float matrix[static 9], float alpha);
- *
- * 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);
-
 /**
  * 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.
  */
@@ -133,17 +127,6 @@ bool wlr_texture_upload_dmabuf(struct wlr_texture *tex,
  */
 bool wlr_texture_update_shm(struct wlr_texture *surf, uint32_t format,
 	int x, int y, int width, int height, struct wl_shm_buffer *shm);
-/**
- * Prepares a matrix with the appropriate scale for the given texture and
- * multiplies it with the projection, producing a matrix that the shader can
- * muptlipy vertex coordinates with to get final screen coordinates.
- *
- * The projection matrix is assumed to be an orthographic projection of [0,
- * 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);
 /**
  * Destroys this wlr_texture.
  */

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,
+	bool (*render_texture_with_matrix)(struct wlr_renderer *renderer,
-		struct wlr_texture *texture, const float (*matrix)[16], float alpha);
+		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 +62,6 @@ 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_buffer_size)(struct wlr_texture *texture,
 		struct wl_resource *resource, int *width, int *height);
 	void (*bind)(struct wlr_texture *texture);

include/wlr/render/matrix.h

@@ -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

include/wlr/types/wlr_matrix.h

@@ -0,0 +1,21 @@
+#ifndef WLR_TYPES_WLR_MATRIX_H
+#define WLR_TYPES_WLR_MATRIX_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_projection(float mat[static 9], int width, int 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

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;

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 buffer_to_surface_matrix[9];
-	float surface_to_buffer_matrix[16];
+	float surface_to_buffer_matrix[9];
 
 	struct {
 		struct wl_signal commit;
@@ -99,19 +99,6 @@ 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
- * projection matrix, and `transform` is any additional transformations you want
- * to perform on the surface (or NULL/the identity matrix if you don't).
- * `transform` is used before the surface is scaled, so its geometry extends
- * 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]);
-
 
 /**
  * Set the lifetime role for this surface. Returns 0 on success or -1 if the

render/gles2/renderer.c

@@ -9,7 +9,7 @@
 #include <wlr/render.h>
 #include <wlr/render/egl.h>
 #include <wlr/render/interface.h>
-#include <wlr/render/matrix.h>
+#include <wlr/types/wlr_matrix.h>
 #include <wlr/util/log.h>
 #include "render/gles2.h"
 #include "glapi.h"
@@ -85,11 +85,13 @@ static void init_default_shaders() {
 	if (!compile_program(quad_vertex_src, quad_fragment_src, &shaders.quad)) {
 		goto error;
 	}
-	if (!compile_program(quad_vertex_src, ellipse_fragment_src, &shaders.ellipse)) {
+	if (!compile_program(quad_vertex_src, ellipse_fragment_src,
+			&shaders.ellipse)) {
 		goto error;
 	}
 	if (glEGLImageTargetTexture2DOES) {
-		if (!compile_program(quad_vertex_src, fragment_src_external, &shaders.external)) {
+		if (!compile_program(quad_vertex_src, fragment_src_external,
+				&shaders.external)) {
 			goto error;
 		}
 	}
@@ -122,8 +124,8 @@ static void wlr_gles2_end(struct wlr_renderer *wlr_renderer) {
 }
 
 static void wlr_gles2_clear(struct wlr_renderer *wlr_renderer,
-		const float (*color)[4]) {
+		const float color[static 4]) {
-	glClearColor((*color)[0], (*color)[1], (*color)[2], (*color)[3]);
+	glClearColor(color[0], color[1], color[2], color[3]);
 	glClear(GL_COLOR_BUFFER_BIT);
 }
 
@@ -170,15 +172,16 @@ static void draw_quad() {
 	GL_CALL(glDisableVertexAttribArray(1));
 }
 
-static bool wlr_gles2_render_texture(struct wlr_renderer *wlr_renderer,
+static bool wlr_gles2_render_texture_with_matrix(
-		struct wlr_texture *texture, const float (*matrix)[16], float alpha) {
+		struct wlr_renderer *wlr_renderer, struct wlr_texture *texture,
+		const float matrix[static 9], float alpha) {
 	if (!texture || !texture->valid) {
 		wlr_log(L_ERROR, "attempt to render invalid texture");
 		return false;
 	}
 
 	wlr_texture_bind(texture);
-	GL_CALL(glUniformMatrix4fv(0, 1, GL_FALSE, *matrix));
+	GL_CALL(glUniformMatrix3fv(0, 1, GL_TRUE, matrix));
 	GL_CALL(glUniform1i(1, texture->inverted_y));
 	GL_CALL(glUniform1f(3, alpha));
 	draw_quad();
@@ -187,18 +190,18 @@ static bool wlr_gles2_render_texture(struct wlr_renderer *wlr_renderer,
 
 
 static void wlr_gles2_render_quad(struct wlr_renderer *wlr_renderer,
-		const float (*color)[4], const float (*matrix)[16]) {
+		const float color[static 4], const float matrix[static 9]) {
 	GL_CALL(glUseProgram(shaders.quad));
-	GL_CALL(glUniformMatrix4fv(0, 1, GL_FALSE, *matrix));
+	GL_CALL(glUniformMatrix3fv(0, 1, GL_TRUE, matrix));
-	GL_CALL(glUniform4f(1, (*color)[0], (*color)[1], (*color)[2], (*color)[3]));
+	GL_CALL(glUniform4f(1, color[0], color[1], color[2], color[3]));
 	draw_quad();
 }
 
 static void wlr_gles2_render_ellipse(struct wlr_renderer *wlr_renderer,
-		const float (*color)[4], const float (*matrix)[16]) {
+		const float color[static 4], const float matrix[static 9]) {
 	GL_CALL(glUseProgram(shaders.ellipse));
-	GL_CALL(glUniformMatrix4fv(0, 1, GL_TRUE, *matrix));
+	GL_CALL(glUniformMatrix3fv(0, 1, GL_TRUE, matrix));
-	GL_CALL(glUniform4f(1, (*color)[0], (*color)[1], (*color)[2], (*color)[3]));
+	GL_CALL(glUniform4f(1, color[0], color[1], color[2], color[3]));
 	draw_quad();
 }
 
@@ -258,7 +261,7 @@ static struct wlr_renderer_impl wlr_renderer_impl = {
 	.clear = wlr_gles2_clear,
 	.scissor = wlr_gles2_scissor,
 	.texture_create = wlr_gles2_texture_create,
-	.render_with_matrix = wlr_gles2_render_texture,
+	.render_texture_with_matrix = wlr_gles2_render_texture_with_matrix,
 	.render_quad = wlr_gles2_render_quad,
 	.render_ellipse = wlr_gles2_render_ellipse,
 	.formats = wlr_gles2_formats,

render/gles2/shaders.c

@@ -3,27 +3,15 @@
 
 // Colored quads
 const GLchar quad_vertex_src[] =
-"uniform mat4 proj;"
+"uniform mat3 proj;"
 "uniform vec4 color;"
 "attribute vec2 pos;"
 "attribute vec2 texcoord;"
 "varying vec4 v_color;"
 "varying vec2 v_texcoord;"
-"mat4 transpose(in mat4 inMatrix) {"
+""
-"  vec4 i0 = inMatrix[0];"
-"  vec4 i1 = inMatrix[1];"
-"  vec4 i2 = inMatrix[2];"
-"  vec4 i3 = inMatrix[3];"
-"  mat4 outMatrix = mat4("
-"               vec4(i0.x, i1.x, i2.x, i3.x),"
-"               vec4(i0.y, i1.y, i2.y, i3.y),"
-"               vec4(i0.z, i1.z, i2.z, i3.z),"
-"               vec4(i0.w, i1.w, i2.w, i3.w)"
-"               );"
-"  return outMatrix;"
-"}"
 "void main() {"
-"  gl_Position = transpose(proj) * vec4(pos, 0.0, 1.0);"
+"	gl_Position = vec4(proj * vec3(pos, 1.0), 1.0);"
 "	v_color = color;"
 "	v_texcoord = texcoord;"
 "}";
@@ -32,6 +20,7 @@ const GLchar quad_fragment_src[] =
 "precision mediump float;"
 "varying vec4 v_color;"
 "varying vec2 v_texcoord;"
+""
 "void main() {"
 "  gl_FragColor = v_color;"
 "}";
@@ -41,6 +30,7 @@ const GLchar ellipse_fragment_src[] =
 "precision mediump float;"
 "varying vec4 v_color;"
 "varying vec2 v_texcoord;"
+""
 "void main() {"
 "  float l = length(v_texcoord - vec2(0.5, 0.5));"
 "  if (l > 0.5) discard;"
@@ -49,26 +39,14 @@ const GLchar ellipse_fragment_src[] =
 
 // Textured quads
 const GLchar vertex_src[] =
-"uniform mat4 proj;"
+"uniform mat3 proj;"
 "uniform bool invert_y;"
 "attribute vec2 pos;"
 "attribute vec2 texcoord;"
 "varying vec2 v_texcoord;"
-"mat4 transpose(in mat4 inMatrix) {"
+""
-"  vec4 i0 = inMatrix[0];"
-"  vec4 i1 = inMatrix[1];"
-"  vec4 i2 = inMatrix[2];"
-"  vec4 i3 = inMatrix[3];"
-"  mat4 outMatrix = mat4("
-"               vec4(i0.x, i1.x, i2.x, i3.x),"
-"               vec4(i0.y, i1.y, i2.y, i3.y),"
-"               vec4(i0.z, i1.z, i2.z, i3.z),"
-"               vec4(i0.w, i1.w, i2.w, i3.w)"
-"               );"
-"  return outMatrix;"
-"}"
 "void main() {"
-"  gl_Position = transpose(proj) * vec4(pos, 0.0, 1.0);"
+"  gl_Position = vec4(proj * vec3(pos, 1.0), 1.0);"
 "  if (invert_y) {"
 "    v_texcoord = vec2(texcoord.s, 1.0 - texcoord.t);"
 "  } else {"
@@ -81,6 +59,7 @@ const GLchar fragment_src_rgba[] =
 "varying vec2 v_texcoord;"
 "uniform sampler2D tex;"
 "uniform float alpha;"
+""
 "void main() {"
 "	gl_FragColor = alpha * texture2D(tex, v_texcoord);"
 "}";
@@ -90,6 +69,7 @@ const GLchar fragment_src_rgbx[] =
 "varying vec2 v_texcoord;"
 "uniform sampler2D tex;"
 "uniform float alpha;"
+""
 "void main() {"
 "	gl_FragColor.rgb = alpha * texture2D(tex, v_texcoord).rgb;"
 "	gl_FragColor.a = alpha;"
@@ -100,6 +80,7 @@ const GLchar fragment_src_external[] =
 "precision mediump float;"
 "varying vec2 v_texcoord;"
 "uniform samplerExternalOES texture0;"
+""
 "void main() {"
 "	vec4 col = texture2D(texture0, v_texcoord);"
 "	gl_FragColor = vec4(col.rgb, col.a);"

render/gles2/texture.c

@@ -8,7 +8,7 @@
 #include <wlr/render.h>
 #include <wlr/render/egl.h>
 #include <wlr/render/interface.h>
-#include <wlr/render/matrix.h>
+#include <wlr/types/wlr_matrix.h>
 #include <wlr/util/log.h>
 #include "render/gles2.h"
 #include "util/signal.h"
@@ -229,7 +229,6 @@ static bool gles2_texture_upload_eglimage(struct wlr_texture *wlr_tex,
 	return true;
 }
 
-
 static bool gles2_texture_upload_dmabuf(struct wlr_texture *_tex,
 		struct wl_resource *dmabuf_resource) {
 	struct wlr_gles2_texture *tex = (struct wlr_gles2_texture *)_tex;
@@ -265,20 +264,6 @@ static bool gles2_texture_upload_dmabuf(struct wlr_texture *_tex,
 	return true;
 }
 
-static void gles2_texture_get_matrix(struct wlr_texture *_texture,
-		float (*matrix)[16], const float (*projection)[16], int x, int y) {
-	struct wlr_gles2_texture *texture = (struct wlr_gles2_texture *)_texture;
-	float world[16];
-	wlr_matrix_identity(matrix);
-	wlr_matrix_translate(&world, x, y, 0);
-	wlr_matrix_mul(matrix, &world, matrix);
-	wlr_matrix_scale(&world,
-			texture->wlr_texture.width, texture->wlr_texture.height, 1);
-	wlr_matrix_mul(matrix, &world, matrix);
-	wlr_matrix_mul(projection, matrix, matrix);
-}
-
-
 static bool gles2_texture_get_dmabuf_size(struct wlr_texture *texture, struct
 		wl_resource *resource, int *width, int *height) {
 	if (!wlr_dmabuf_resource_is_buffer(resource)) {
@@ -292,7 +277,6 @@ static bool gles2_texture_get_dmabuf_size(struct wlr_texture *texture, struct
 	return true;
 }
 
-
 static void gles2_texture_get_buffer_size(struct wlr_texture *texture, struct
 		wl_resource *resource, int *width, int *height) {
 	struct wl_shm_buffer *buffer = wl_shm_buffer_get(resource);
@@ -349,7 +333,6 @@ static struct wlr_texture_impl wlr_texture_impl = {
 	.upload_drm = gles2_texture_upload_drm,
 	.upload_dmabuf = gles2_texture_upload_dmabuf,
 	.upload_eglimage = gles2_texture_upload_eglimage,
-	.get_matrix = gles2_texture_get_matrix,
 	.get_buffer_size = gles2_texture_get_buffer_size,
 	.bind = gles2_texture_bind,
 	.destroy = gles2_texture_destroy,

render/matrix.c

@@ -1,210 +0,0 @@
-#include <math.h>
-#include <string.h>
-#include <wayland-server-protocol.h>
-#include <wlr/render/matrix.h>
-#include <wlr/types/wlr_box.h>
-#include <wlr/types/wlr_output.h>
-
-/* Obtains the index for the given row/column */
-static inline int mind(int row, int col) {
-	return (row - 1) * 4 + col - 1;
-}
-
-void wlr_matrix_identity(float (*output)[16]) {
-	static const float identity[16] = {
-		1.0f, 0.0f, 0.0f, 0.0f,
-		0.0f, 1.0f, 0.0f, 0.0f,
-		0.0f, 0.0f, 1.0f, 0.0f,
-		0.0f, 0.0f, 0.0f, 1.0f
-	};
-	memcpy(*output, identity, sizeof(identity));
-}
-
-void wlr_matrix_translate(float (*output)[16], float x, float y, float z) {
-	wlr_matrix_identity(output);
-	(*output)[mind(1, 4)] = x;
-	(*output)[mind(2, 4)] = y;
-	(*output)[mind(3, 4)] = z;
-}
-
-void wlr_matrix_scale(float (*output)[16], float x, float y, float z) {
-	wlr_matrix_identity(output);
-	(*output)[mind(1, 1)] = x;
-	(*output)[mind(2, 2)] = y;
-	(*output)[mind(3, 3)] = z;
-}
-
-void wlr_matrix_rotate(float (*output)[16], float radians) {
-	wlr_matrix_identity(output);
-	float _cos = cosf(radians);
-	float _sin = sinf(radians);
-	(*output)[mind(1, 1)] = _cos;
-	(*output)[mind(1, 2)] = _sin;
-	(*output)[mind(2, 1)] = -_sin;
-	(*output)[mind(2, 2)] = _cos;
-}
-
-void wlr_matrix_mul(const float (*x)[16], const float (*y)[16], float (*product)[16]) {
-	float _product[16] = {
-		(*x)[mind(1, 1)] * (*y)[mind(1, 1)] + (*x)[mind(1, 2)] * (*y)[mind(2, 1)] +
-			(*x)[mind(1, 3)] * (*y)[mind(3, 1)] + (*x)[mind(1, 4)] * (*y)[mind(4, 1)],
-		(*x)[mind(1, 1)] * (*y)[mind(1, 2)] + (*x)[mind(1, 2)] * (*y)[mind(2, 2)] +
-			(*x)[mind(1, 3)] * (*y)[mind(3, 2)] + (*x)[mind(1, 4)] * (*y)[mind(4, 2)],
-		(*x)[mind(1, 1)] * (*y)[mind(1, 3)] + (*x)[mind(1, 2)] * (*y)[mind(2, 3)] +
-			(*x)[mind(1, 3)] * (*y)[mind(3, 3)] + (*x)[mind(1, 4)] * (*y)[mind(4, 3)],
-		(*x)[mind(1, 1)] * (*y)[mind(1, 4)] + (*x)[mind(1, 2)] * (*y)[mind(2, 4)] +
-			(*x)[mind(1, 4)] * (*y)[mind(3, 4)] + (*x)[mind(1, 4)] * (*y)[mind(4, 4)],
-
-		(*x)[mind(2, 1)] * (*y)[mind(1, 1)] + (*x)[mind(2, 2)] * (*y)[mind(2, 1)] +
-			(*x)[mind(2, 3)] * (*y)[mind(3, 1)] + (*x)[mind(2, 4)] * (*y)[mind(4, 1)],
-		(*x)[mind(2, 1)] * (*y)[mind(1, 2)] + (*x)[mind(2, 2)] * (*y)[mind(2, 2)] +
-			(*x)[mind(2, 3)] * (*y)[mind(3, 2)] + (*x)[mind(2, 4)] * (*y)[mind(4, 2)],
-		(*x)[mind(2, 1)] * (*y)[mind(1, 3)] + (*x)[mind(2, 2)] * (*y)[mind(2, 3)] +
-			(*x)[mind(2, 3)] * (*y)[mind(3, 3)] + (*x)[mind(2, 4)] * (*y)[mind(4, 3)],
-		(*x)[mind(2, 1)] * (*y)[mind(1, 4)] + (*x)[mind(2, 2)] * (*y)[mind(2, 4)] +
-			(*x)[mind(2, 4)] * (*y)[mind(3, 4)] + (*x)[mind(2, 4)] * (*y)[mind(4, 4)],
-
-		(*x)[mind(3, 1)] * (*y)[mind(1, 1)] + (*x)[mind(3, 2)] * (*y)[mind(2, 1)] +
-			(*x)[mind(3, 3)] * (*y)[mind(3, 1)] + (*x)[mind(3, 4)] * (*y)[mind(4, 1)],
-		(*x)[mind(3, 1)] * (*y)[mind(1, 2)] + (*x)[mind(3, 2)] * (*y)[mind(2, 2)] +
-			(*x)[mind(3, 3)] * (*y)[mind(3, 2)] + (*x)[mind(3, 4)] * (*y)[mind(4, 2)],
-		(*x)[mind(3, 1)] * (*y)[mind(1, 3)] + (*x)[mind(3, 2)] * (*y)[mind(2, 3)] +
-			(*x)[mind(3, 3)] * (*y)[mind(3, 3)] + (*x)[mind(3, 4)] * (*y)[mind(4, 3)],
-		(*x)[mind(3, 1)] * (*y)[mind(1, 4)] + (*x)[mind(3, 2)] * (*y)[mind(2, 4)] +
-			(*x)[mind(3, 4)] * (*y)[mind(3, 4)] + (*x)[mind(3, 4)] * (*y)[mind(4, 4)],
-
-		(*x)[mind(4, 1)] * (*y)[mind(1, 1)] + (*x)[mind(4, 2)] * (*y)[mind(2, 1)] +
-			(*x)[mind(4, 3)] * (*y)[mind(3, 1)] + (*x)[mind(4, 4)] * (*y)[mind(4, 1)],
-		(*x)[mind(4, 1)] * (*y)[mind(1, 2)] + (*x)[mind(4, 2)] * (*y)[mind(2, 2)] +
-			(*x)[mind(4, 3)] * (*y)[mind(3, 2)] + (*x)[mind(4, 4)] * (*y)[mind(4, 2)],
-		(*x)[mind(4, 1)] * (*y)[mind(1, 3)] + (*x)[mind(4, 2)] * (*y)[mind(2, 3)] +
-			(*x)[mind(4, 3)] * (*y)[mind(3, 3)] + (*x)[mind(4, 4)] * (*y)[mind(4, 3)],
-		(*x)[mind(4, 1)] * (*y)[mind(1, 4)] + (*x)[mind(4, 2)] * (*y)[mind(2, 4)] +
-			(*x)[mind(4, 4)] * (*y)[mind(3, 4)] + (*x)[mind(4, 4)] * (*y)[mind(4, 4)],
-	};
-	memcpy(*product, _product, sizeof(_product));
-}
-
-static const float transforms[][4] = {
-	[WL_OUTPUT_TRANSFORM_NORMAL] = {
-		1.0f, 0.0f,
-		0.0f, 1.0f,
-	},
-	[WL_OUTPUT_TRANSFORM_90] = {
-		0.0f, -1.0f,
-		1.0f, 0.0f,
-	},
-	[WL_OUTPUT_TRANSFORM_180] = {
-		-1.0f, 0.0f,
-		0.0f, -1.0f,
-	},
-	[WL_OUTPUT_TRANSFORM_270] = {
-		0.0f, 1.0f,
-		-1.0f, 0.0f,
-	},
-	[WL_OUTPUT_TRANSFORM_FLIPPED] = {
-		-1.0f, 0.0f,
-		0.0f, 1.0f,
-	},
-	[WL_OUTPUT_TRANSFORM_FLIPPED_90] = {
-		0.0f, -1.0f,
-		-1.0f, 0.0f,
-	},
-	[WL_OUTPUT_TRANSFORM_FLIPPED_180] = {
-		1.0f, 0.0f,
-		0.0f, -1.0f,
-	},
-	[WL_OUTPUT_TRANSFORM_FLIPPED_270] = {
-		0.0f, 1.0f,
-		1.0f, 0.0f,
-	},
-};
-
-void wlr_matrix_transform(float mat[static 16],
-		enum wl_output_transform transform) {
-	memset(mat, 0, sizeof(*mat) * 16);
-
-	const float *t = transforms[transform];
-
-	// Rotation + reflection
-	mat[0] = t[0];
-	mat[1] = t[1];
-	mat[4] = t[2];
-	mat[5] = t[3];
-
-	// Identity
-	mat[10] = 1.0f;
-	mat[15] = 1.0f;
-}
-
-// Equivilent to glOrtho(0, width, 0, height, 1, -1) with the transform applied
-void wlr_matrix_texture(float mat[static 16], int32_t width, int32_t height,
-		enum wl_output_transform transform) {
-	memset(mat, 0, sizeof(*mat) * 16);
-
-	const float *t = transforms[transform];
-	float x = 2.0f / width;
-	float y = 2.0f / height;
-
-	// Rotation + reflection
-	mat[0] = x * t[0];
-	mat[1] = x * t[1];
-	mat[4] = y * -t[2];
-	mat[5] = y * -t[3];
-
-	// Translation
-	mat[3] = -copysign(1.0f, mat[0] + mat[1]);
-	mat[7] = -copysign(1.0f, mat[4] + mat[5]);
-
-	// Identity
-	mat[10] = 1.0f;
-	mat[15] = 1.0f;
-}
-
-void wlr_matrix_project_box(float (*mat)[16], struct wlr_box *box,
-		enum wl_output_transform transform, float rotation,
-		float (*projection)[16]) {
-	int x = box->x;
-	int y = box->y;
-	int width = box->width;
-	int height = box->height;
-
-	wlr_matrix_translate(mat, x, y, 0);
-
-	if (rotation != 0) {
-		float translate_center[16];
-		wlr_matrix_translate(&translate_center, width/2, height/2, 0);
-
-		float rotate[16];
-		wlr_matrix_rotate(&rotate, rotation);
-
-		float translate_origin[16];
-		wlr_matrix_translate(&translate_origin, -width/2, -height/2, 0);
-
-		wlr_matrix_mul(mat, &translate_center, mat);
-		wlr_matrix_mul(mat, &rotate, mat);
-		wlr_matrix_mul(mat, &translate_origin, mat);
-	}
-
-	float scale[16];
-	wlr_matrix_scale(&scale, width, height, 1);
-
-	wlr_matrix_mul(mat, &scale, mat);
-
-	if (transform != WL_OUTPUT_TRANSFORM_NORMAL) {
-		float surface_translate_center[16];
-		wlr_matrix_translate(&surface_translate_center, 0.5, 0.5, 0);
-
-		float surface_transform[16];
-		wlr_matrix_transform(surface_transform, transform);
-
-		float surface_translate_origin[16];
-		wlr_matrix_translate(&surface_translate_origin, -0.5, -0.5, 0);
-
-		wlr_matrix_mul(mat, &surface_translate_center, mat);
-		wlr_matrix_mul(mat, &surface_transform, mat);
-		wlr_matrix_mul(mat, &surface_translate_origin, mat);
-	}
-
-	wlr_matrix_mul(projection, mat, mat);
-}

render/meson.build

@@ -15,7 +15,6 @@ lib_wlr_render = static_library(
 		'gles2/shaders.c',
 		'gles2/texture.c',
 		'gles2/util.c',
-		'matrix.c',
 		'wlr_renderer.c',
 		'wlr_texture.c',
 	),

render/wlr_renderer.c

@@ -1,6 +1,7 @@
 #include <stdbool.h>
 #include <stdlib.h>
 #include <wlr/render/interface.h>
+#include <wlr/types/wlr_matrix.h>
 
 void wlr_renderer_init(struct wlr_renderer *renderer,
 		struct wlr_renderer_impl *impl) {
@@ -23,7 +24,7 @@ void wlr_renderer_end(struct wlr_renderer *r) {
 	r->impl->end(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]) {
 	r->impl->clear(r, color);
 }
 
@@ -35,18 +36,30 @@ struct wlr_texture *wlr_render_texture_create(struct wlr_renderer *r) {
 	return r->impl->texture_create(r);
 }
 
-bool wlr_render_with_matrix(struct wlr_renderer *r,
+bool wlr_render_texture(struct wlr_renderer *r, struct wlr_texture *texture,
-		struct wlr_texture *texture, const float (*matrix)[16], float alpha) {
+		const float projection[static 9], int x, int y, float alpha) {
-	return r->impl->render_with_matrix(r, texture, matrix, alpha);
+	float mat[9];
+	wlr_matrix_identity(mat);
+	wlr_matrix_translate(mat, x, y);
+	wlr_matrix_scale(mat, texture->width, texture->height);
+	wlr_matrix_multiply(mat, projection, mat);
+
+	return wlr_render_texture_with_matrix(r, texture, mat, alpha);
+}
+
+bool wlr_render_texture_with_matrix(struct wlr_renderer *r,
+		struct wlr_texture *texture, const float matrix[static 9],
+		float alpha) {
+	return r->impl->render_texture_with_matrix(r, texture, matrix, alpha);
 }
 
 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]) {
 	r->impl->render_quad(r, color, matrix);
 }
 
 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]) {
 	r->impl->render_ellipse(r, color, matrix);
 }
 

render/wlr_texture.c

@@ -58,11 +58,6 @@ bool wlr_texture_upload_dmabuf(struct wlr_texture *texture,
 	return texture->impl->upload_dmabuf(texture, dmabuf_resource);
 }
 
-void wlr_texture_get_matrix(struct wlr_texture *texture,
-		float (*matrix)[16], const float (*projection)[16], int x, int y) {
-	texture->impl->get_matrix(texture, matrix, projection, x, y);
-}
-
 void wlr_texture_get_buffer_size(struct wlr_texture *texture, struct wl_resource
 		*resource, int *width, int *height) {
 	texture->impl->get_buffer_size(texture, resource, width, height);

rootston/output.c

@@ -3,7 +3,7 @@
 #include <stdbool.h>
 #include <stdlib.h>
 #include <time.h>
-#include <wlr/render/matrix.h>
+#include <wlr/types/wlr_matrix.h>
 #include <wlr/types/wlr_compositor.h>
 #include <wlr/types/wlr_output_layout.h>
 #include <wlr/types/wlr_wl_shell.h>
@@ -287,17 +287,17 @@ static void render_surface(struct wlr_surface *surface, double lx, double ly,
 		goto damage_finish;
 	}
 
-	float matrix[16];
+	float matrix[9];
 	enum wl_output_transform transform =
 		wlr_output_transform_invert(surface->current->transform);
-	wlr_matrix_project_box(&matrix, &box, transform, rotation,
+	wlr_matrix_project_box(matrix, &box, transform, rotation,
-		&output->wlr_output->transform_matrix);
+		output->wlr_output->transform_matrix);
 
 	int nrects;
 	pixman_box32_t *rects = pixman_region32_rectangles(&damage, &nrects);
 	for (int i = 0; i < nrects; ++i) {
 		scissor_output(output, &rects[i]);
-		wlr_render_with_matrix(renderer, surface->texture, &matrix, data->alpha);
+		wlr_render_texture_with_matrix(renderer, surface->texture, matrix, data->alpha);
 	}
 
 damage_finish:
@@ -353,9 +353,9 @@ static void render_decorations(struct roots_view *view,
 		goto damage_finish;
 	}
 
-	float matrix[16];
+	float matrix[9];
-	wlr_matrix_project_box(&matrix, &box, WL_OUTPUT_TRANSFORM_NORMAL,
+	wlr_matrix_project_box(matrix, &box, WL_OUTPUT_TRANSFORM_NORMAL,
-		view->rotation, &output->wlr_output->transform_matrix);
+		view->rotation, output->wlr_output->transform_matrix);
 	float color[] = { 0.2, 0.2, 0.2, view->alpha };
 
 	int nrects;
@@ -363,7 +363,7 @@ static void render_decorations(struct roots_view *view,
 		pixman_region32_rectangles(&damage, &nrects);
 	for (int i = 0; i < nrects; ++i) {
 		scissor_output(output, &rects[i]);
-		wlr_render_colored_quad(renderer, &color, &matrix);
+		wlr_render_colored_quad(renderer, color, matrix);
 	}
 
 damage_finish:
@@ -490,7 +490,7 @@ static void render_output(struct roots_output *output) {
 	pixman_box32_t *rects = pixman_region32_rectangles(&damage, &nrects);
 	for (int i = 0; i < nrects; ++i) {
 		scissor_output(output, &rects[i]);
-		wlr_renderer_clear(renderer, &clear_color);
+		wlr_renderer_clear(renderer, clear_color);
 	}
 
 	// If a view is fullscreen on this output, render it

types/meson.build

@@ -6,11 +6,13 @@ lib_wlr_types = static_library(
 		'wlr_cursor.c',
 		'wlr_data_device.c',
 		'wlr_gamma_control.c',
+		'wlr_idle_inhibit_v1.c',
 		'wlr_idle.c',
 		'wlr_input_device.c',
 		'wlr_keyboard.c',
 		'wlr_linux_dmabuf.c',
 		'wlr_list.c',
+		'wlr_matrix.c',
 		'wlr_output_damage.c',
 		'wlr_output_layout.c',
 		'wlr_output.c',
@@ -28,7 +30,6 @@ lib_wlr_types = static_library(
 		'wlr_xcursor_manager.c',
 		'wlr_xdg_shell_v6.c',
 		'wlr_xdg_shell.c',
-		'wlr_idle_inhibit_v1.c',
 	),
 	include_directories: wlr_inc,
 	dependencies: [pixman, xkbcommon, wayland_server, wlr_protos],

types/wlr_matrix.c

@@ -0,0 +1,160 @@
+#include <math.h>
+#include <string.h>
+#include <wayland-server-protocol.h>
+#include <wlr/types/wlr_matrix.h>
+#include <wlr/types/wlr_box.h>
+#include <wlr/types/wlr_output.h>
+
+void wlr_matrix_identity(float mat[static 9]) {
+	static const float identity[9] = {
+		1.0f, 0.0f, 0.0f,
+		0.0f, 1.0f, 0.0f,
+		0.0f, 0.0f, 1.0f,
+	};
+	memcpy(mat, identity, sizeof(identity));
+}
+
+void wlr_matrix_multiply(float mat[static 9], const float a[static 9],
+		const float b[static 9]) {
+	float product[9];
+
+	product[0] = a[0]*b[0] + a[1]*b[3] + a[2]*b[6];
+	product[1] = a[0]*b[1] + a[1]*b[4] + a[2]*b[7];
+	product[2] = a[0]*b[2] + a[1]*b[5] + a[2]*b[8];
+
+	product[3] = a[3]*b[0] + a[4]*b[3] + a[5]*b[6];
+	product[4] = a[3]*b[1] + a[4]*b[4] + a[5]*b[7];
+	product[5] = a[3]*b[2] + a[4]*b[5] + a[5]*b[8];
+
+	product[6] = a[6]*b[0] + a[7]*b[3] + a[8]*b[6];
+	product[7] = a[6]*b[1] + a[7]*b[4] + a[8]*b[7];
+	product[8] = a[6]*b[2] + a[7]*b[5] + a[8]*b[8];
+
+	memcpy(mat, product, sizeof(product));
+}
+
+void wlr_matrix_translate(float mat[static 9], float x, float y) {
+	float translate[9] = {
+		1.0f, 0.0f, x,
+		0.0f, 1.0f, y,
+		0.0f, 0.0f, 1.0f,
+	};
+	wlr_matrix_multiply(mat, mat, translate);
+}
+
+void wlr_matrix_scale(float mat[static 9], float x, float y) {
+	float scale[9] = {
+		x,    0.0f, 0.0f,
+		0.0f, y,    0.0f,
+		0.0f, 0.0f, 1.0f,
+	};
+	wlr_matrix_multiply(mat, mat, scale);
+}
+
+void wlr_matrix_rotate(float mat[static 9], float rad) {
+	float rotate[9] = {
+		cos(rad), -sin(rad), 0.0f,
+		sin(rad),  cos(rad), 0.0f,
+		0.0f,      0.0f,     1.0f,
+	};
+	wlr_matrix_multiply(mat, mat, rotate);
+}
+
+static const float transforms[][9] = {
+	[WL_OUTPUT_TRANSFORM_NORMAL] = {
+		1.0f, 0.0f, 0.0f,
+		0.0f, 1.0f, 0.0f,
+		0.0f, 0.0f, 1.0f,
+	},
+	[WL_OUTPUT_TRANSFORM_90] = {
+		0.0f, -1.0f, 0.0f,
+		1.0f, 0.0f, 0.0f,
+		0.0f, 0.0f, 1.0f,
+	},
+	[WL_OUTPUT_TRANSFORM_180] = {
+		-1.0f, 0.0f, 0.0f,
+		0.0f, -1.0f, 0.0f,
+		0.0f, 0.0f, 1.0f,
+	},
+	[WL_OUTPUT_TRANSFORM_270] = {
+		0.0f, 1.0f, 0.0f,
+		-1.0f, 0.0f, 0.0f,
+		0.0f, 0.0f, 1.0f,
+	},
+	[WL_OUTPUT_TRANSFORM_FLIPPED] = {
+		-1.0f, 0.0f, 0.0f,
+		0.0f, 1.0f, 0.0f,
+		0.0f, 0.0f, 1.0f,
+	},
+	[WL_OUTPUT_TRANSFORM_FLIPPED_90] = {
+		0.0f, -1.0f, 0.0f,
+		-1.0f, 0.0f, 0.0f,
+		0.0f, 0.0f, 1.0f,
+	},
+	[WL_OUTPUT_TRANSFORM_FLIPPED_180] = {
+		1.0f, 0.0f, 0.0f,
+		0.0f, -1.0f, 0.0f,
+		0.0f, 0.0f, 1.0f,
+	},
+	[WL_OUTPUT_TRANSFORM_FLIPPED_270] = {
+		0.0f, 1.0f, 0.0f,
+		1.0f, 0.0f, 0.0f,
+		0.0f, 0.0f, 1.0f,
+	},
+};
+
+void wlr_matrix_transform(float mat[static 9],
+		enum wl_output_transform transform) {
+	wlr_matrix_multiply(mat, mat, transforms[transform]);
+}
+
+// Equivilent to glOrtho(0, width, 0, height, 1, -1) with the transform applied
+void wlr_matrix_projection(float mat[static 9], int width, int height,
+		enum wl_output_transform transform) {
+	memset(mat, 0, sizeof(*mat) * 9);
+
+	const float *t = transforms[transform];
+	float x = 2.0f / width;
+	float y = 2.0f / height;
+
+	// Rotation + reflection
+	mat[0] = x * t[0];
+	mat[1] = x * t[1];
+	mat[3] = y * -t[3];
+	mat[4] = y * -t[4];
+
+	// Translation
+	mat[2] = -copysign(1.0f, mat[0] + mat[1]);
+	mat[5] = -copysign(1.0f, mat[3] + mat[4]);
+
+	// Identity
+	mat[8] = 1.0f;
+}
+
+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]) {
+	int x = box->x;
+	int y = box->y;
+	int width = box->width;
+	int height = box->height;
+
+	wlr_matrix_identity(mat);
+	wlr_matrix_translate(mat, x, y);
+
+	if (rotation != 0) {
+		wlr_matrix_translate(mat, width/2, height/2);
+		wlr_matrix_rotate(mat, rotation);
+		wlr_matrix_translate(mat, -width/2, -height/2);
+	}
+
+	wlr_matrix_scale(mat, width, height);
+
+	if (transform != WL_OUTPUT_TRANSFORM_NORMAL) {
+		wlr_matrix_translate(mat, 0.5, 0.5);
+		wlr_matrix_transform(mat, transform);
+		wlr_matrix_translate(mat, -0.5, -0.5);
+	}
+
+	wlr_matrix_multiply(mat, projection, mat);
+}

types/wlr_output.c

@@ -7,7 +7,7 @@
 #include <wayland-server.h>
 #include <wlr/interfaces/wlr_output.h>
 #include <wlr/render.h>
-#include <wlr/render/matrix.h>
+#include <wlr/types/wlr_matrix.h>
 #include <wlr/types/wlr_box.h>
 #include <wlr/types/wlr_output.h>
 #include <wlr/types/wlr_surface.h>
@@ -139,8 +139,8 @@ void wlr_output_update_enabled(struct wlr_output *output, bool enabled) {
 }
 
 static void wlr_output_update_matrix(struct wlr_output *output) {
-	wlr_matrix_texture(output->transform_matrix, output->width, output->height,
+	wlr_matrix_projection(output->transform_matrix, output->width,
-		output->transform);
+		output->height, output->transform);
 }
 
 void wlr_output_enable(struct wlr_output *output, bool enable) {
@@ -368,25 +368,25 @@ static void output_fullscreen_surface_render(struct wlr_output *output,
 	assert(renderer);
 
 	if (!wlr_surface_has_buffer(surface)) {
-		wlr_renderer_clear(renderer, &(float[]){0, 0, 0, 0});
+		wlr_renderer_clear(renderer, (float[]){0, 0, 0, 0});
 		return;
 	}
 
 	struct wlr_box box;
 	output_fullscreen_surface_get_box(output, surface, &box);
 
-	float matrix[16];
+	float matrix[9];
 	enum wl_output_transform transform =
 		wlr_output_transform_invert(surface->current->transform);
-	wlr_matrix_project_box(&matrix, &box, transform, 0,
+	wlr_matrix_project_box(matrix, &box, transform, 0,
-		&output->transform_matrix);
+		output->transform_matrix);
 
 	int nrects;
 	pixman_box32_t *rects = pixman_region32_rectangles(damage, &nrects);
 	for (int i = 0; i < nrects; ++i) {
 		output_scissor(output, &rects[i]);
-		wlr_renderer_clear(renderer, &(float[]){0, 0, 0, 0});
+		wlr_renderer_clear(renderer, (float[]){0, 0, 0, 0});
-		wlr_render_with_matrix(surface->renderer, surface->texture, &matrix, 1.0f);
+		wlr_render_texture_with_matrix(surface->renderer, surface->texture, matrix, 1.0f);
 	}
 	wlr_renderer_scissor(renderer, NULL);
 
@@ -435,15 +435,15 @@ static void output_cursor_render(struct wlr_output_cursor *cursor,
 		goto surface_damage_finish;
 	}
 
-	float matrix[16];
+	float matrix[9];
-	wlr_matrix_project_box(&matrix, &box, WL_OUTPUT_TRANSFORM_NORMAL, 0,
+	wlr_matrix_project_box(matrix, &box, WL_OUTPUT_TRANSFORM_NORMAL, 0,
-		&cursor->output->transform_matrix);
+		cursor->output->transform_matrix);
 
 	int nrects;
 	pixman_box32_t *rects = pixman_region32_rectangles(&surface_damage, &nrects);
 	for (int i = 0; i < nrects; ++i) {
 		output_scissor(cursor->output, &rects[i]);
-		wlr_render_with_matrix(renderer, texture, &matrix, 1.0f);
+		wlr_render_texture_with_matrix(renderer, texture, matrix, 1.0f);
 	}
 	wlr_renderer_scissor(renderer, NULL);
 

types/wlr_surface.c

@@ -3,7 +3,7 @@
 #include <wayland-server.h>
 #include <wlr/render/egl.h>
 #include <wlr/render/interface.h>
-#include <wlr/render/matrix.h>
+#include <wlr/types/wlr_matrix.h>
 #include <wlr/types/wlr_region.h>
 #include <wlr/types/wlr_surface.h>
 #include <wlr/util/log.h>
@@ -628,22 +628,6 @@ struct wlr_surface *wlr_surface_create(struct wl_resource *res,
 	return surface;
 }
 
-void wlr_surface_get_matrix(struct wlr_surface *surface,
-		float (*matrix)[16],
-		const float (*projection)[16],
-		const float (*transform)[16]) {
-	int width = surface->texture->width;
-	int height = surface->texture->height;
-	float scale[16];
-	wlr_matrix_identity(matrix);
-	if (transform) {
-		wlr_matrix_mul(matrix, transform, matrix);
-	}
-	wlr_matrix_scale(&scale, width, height, 1);
-	wlr_matrix_mul(matrix, &scale, matrix);
-	wlr_matrix_mul(projection, matrix, matrix);
-}
-
 bool wlr_surface_has_buffer(struct wlr_surface *surface) {
 	return surface->texture && surface->texture->valid;
 }