Updated DRM cursor rendering

backend/drm/backend.c

@@ -53,6 +53,7 @@ static void session_signal(struct wl_listener *listener, void *data) {
 		for (size_t i = 0; i < drm->outputs->length; ++i) {
 			struct wlr_output_state *output = drm->outputs->items[i];
 			wlr_drm_output_start_renderer(output);
+			wlr_drm_crtc_set_cursor(drm, output->crtc);
 		}
 	} else {
 		wlr_log(L_INFO, "DRM fd paused");

backend/drm/drm.c

@@ -15,6 +15,9 @@
 #include <wlr/backend/interface.h>
 #include <wlr/interfaces/wlr_output.h>
 #include <wlr/util/log.h>
+#include <wlr/render/matrix.h>
+#include <wlr/render/gles2.h>
+#include <wlr/render.h>
 #include "drm.h"
 #include "drm-util.h"
 
@@ -174,7 +177,7 @@ void wlr_drm_renderer_free(struct wlr_drm_renderer *renderer) {
 }
 
 static bool wlr_drm_plane_renderer_init(struct wlr_drm_renderer *renderer,
-		struct wlr_drm_plane *plane, uint32_t width, uint32_t height) {
+		struct wlr_drm_plane *plane, uint32_t width, uint32_t height, uint32_t flags) {
 	if (plane->width == width && plane->height == height) {
 		return true;
 	}
@@ -183,7 +186,7 @@ static bool wlr_drm_plane_renderer_init(struct wlr_drm_renderer *renderer,
 	plane->height = height;
 
 	plane->gbm = gbm_surface_create(renderer->gbm, width, height,
-		GBM_FORMAT_XRGB8888, GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING);
+		GBM_FORMAT_ARGB8888, GBM_BO_USE_RENDERING | flags);
 	if (!plane->gbm) {
 		wlr_log_errno(L_ERROR, "Failed to create GBM surface for plane");
 		return false;
@@ -203,8 +206,6 @@ static void wlr_drm_plane_renderer_free(struct wlr_drm_renderer *renderer,
 	if (!renderer || !plane)
 		return;
 
-	wlr_log(L_DEBUG, "%s called", __func__);
-
 	if (plane->front)
 		gbm_surface_release_buffer(plane->gbm, plane->front);
 	if (plane->back)
@@ -215,12 +216,19 @@ static void wlr_drm_plane_renderer_free(struct wlr_drm_renderer *renderer,
 	if (plane->gbm)
 		gbm_surface_destroy(plane->gbm);
 
+	if (plane->wlr_surf)
+		wlr_surface_destroy(plane->wlr_surf);
+	if (plane->wlr_rend)
+		wlr_renderer_destroy(plane->wlr_rend);
+
 	plane->width = 0;
 	plane->height = 0;
 	plane->egl = EGL_NO_SURFACE;
 	plane->gbm = NULL;
 	plane->front = NULL;
 	plane->back = NULL;
+	plane->wlr_rend = NULL;
+	plane->wlr_surf = NULL;
 }
 
 static void free_fb(struct gbm_bo *bo, void *data) {
@@ -480,7 +488,7 @@ static bool wlr_drm_output_set_mode(struct wlr_output_state *output,
 			continue;
 
 		if (!wlr_drm_plane_renderer_init(&drm->renderer, crtc->primary,
-				mode->width, mode->height)) {
+				mode->width, mode->height, GBM_BO_USE_SCANOUT)) {
 			wlr_log(L_ERROR, "Failed to initalise renderer for plane");
 			goto error_enc;
 		}
@@ -506,79 +514,95 @@ static void wlr_drm_output_transform(struct wlr_output_state *output,
 	output->base->transform = transform;
 }
 
+bool wlr_drm_crtc_set_cursor(struct wlr_backend_state *drm, struct wlr_drm_crtc *crtc) {
+	if (!crtc || !crtc->cursor || !crtc->cursor->gbm)
+		return true;
+
+	struct wlr_drm_plane *plane = crtc->cursor;
+
+	uint32_t bo_handle = gbm_bo_get_handle(plane->back).u32;
+	if (drmModeSetCursor(drm->fd, crtc->id, bo_handle, plane->width, plane->height)) {
+		wlr_log_errno(L_ERROR, "Failed to set hardware cursor");
+		return false;
+	}
+
+	return true;
+}
+
 static bool wlr_drm_output_set_cursor(struct wlr_output_state *output,
 		const uint8_t *buf, int32_t stride, uint32_t width, uint32_t height) {
-	struct wlr_backend_state *state = wl_container_of(output->renderer, state, renderer);
+	struct wlr_backend_state *drm = wl_container_of(output->renderer, drm, renderer);
+	struct wlr_drm_renderer *renderer = output->renderer;
+	struct wlr_drm_crtc *crtc = output->crtc;
+	struct wlr_drm_plane *plane = crtc->cursor;
+
 	if (!buf) {
-		drmModeSetCursor(state->fd, output->crtc->id, 0, 0, 0);
+		drmModeSetCursor(drm->fd, crtc->id, 0, 0, 0);
 		return true;
 	}
 
-	if (!gbm_device_is_format_supported(state->renderer.gbm,
+	if (!plane) {
-				GBM_FORMAT_ARGB8888, GBM_BO_USE_CURSOR | GBM_BO_USE_WRITE)) {
+		plane = calloc(1, sizeof(*plane));
-		wlr_log(L_ERROR, "Failed to create cursor bo: ARGB8888 pixel format is "
+		if (!plane) {
-				"unsupported on this device");
+			wlr_log_errno(L_ERROR, "Allocation failed");
 			return false;
 		}
+		crtc->cursor = plane;
+	}
 
-	uint64_t bo_width, bo_height;
+	if (!plane->gbm) {
 		int ret;
+		uint64_t w, h;
+		ret = drmGetCap(drm->fd, DRM_CAP_CURSOR_WIDTH, &w);
+		w = ret ? 64 : w;
+		ret = drmGetCap(drm->fd, DRM_CAP_CURSOR_HEIGHT, &h);
+		h = ret ? 64 : h;
 
-	ret = drmGetCap(state->fd, DRM_CAP_CURSOR_WIDTH, &bo_width);
+		if (width > w || height > h) {
-	bo_width = ret ? 64 : bo_width;
+			wlr_log(L_INFO, "Cursor too large (max %dx%d)", (int)w, (int)h);
-	ret = drmGetCap(state->fd, DRM_CAP_CURSOR_HEIGHT, &bo_height);
-	bo_height = ret ? 64 : bo_height;
-
-	if (width > bo_width || height > bo_width) {
-		wlr_log(L_INFO, "Cursor too large (max %dx%d)", (int)bo_width, (int)bo_height);
 			return false;
 		}
 
-	for (int i = 0; i < 2; ++i) {
+		if (!wlr_drm_plane_renderer_init(renderer, plane, w, h, GBM_BO_USE_CURSOR)) {
-		if (output->cursor_bo[i]) {
+			wlr_log(L_ERROR, "Cannot allocate cursor resources");
-			continue;
-		}
-
-		output->cursor_bo[i] = gbm_bo_create(state->renderer.gbm, bo_width, bo_height,
-			GBM_FORMAT_ARGB8888, GBM_BO_USE_CURSOR | GBM_BO_USE_WRITE);
-
-		if (!output->cursor_bo[i]) {
-			wlr_log(L_ERROR, "Failed to create cursor bo");
-			return false;
-		}
-	}
-
-	struct gbm_bo *bo;
-	output->current_cursor ^= 1;
-	bo = output->cursor_bo[output->current_cursor];
-
-	uint32_t bo_stride = gbm_bo_get_stride(bo);
-	uint8_t tmp[bo_stride * height];
-	memset(tmp, 0, sizeof(tmp));
-
-	for (size_t i = 0; i < height; ++i) {
-		memcpy(tmp + i * bo_stride, buf + i * stride * 4, width * 4);
-	}
-
-	if (gbm_bo_write(bo, tmp, sizeof(tmp)) < 0) {
-		wlr_log(L_ERROR, "Failed to write cursor to bo");
 			return false;
 		}
 
-	uint32_t bo_handle = gbm_bo_get_handle(bo).u32;
+		wlr_matrix_surface(plane->matrix, plane->width, plane->height,
-	if (drmModeSetCursor(state->fd, output->crtc->id, bo_handle, bo_width, bo_height)) {
+			output->base->transform);
-		wlr_log_errno(L_INFO, "Failed to set hardware cursor");
+
+		plane->wlr_rend = wlr_gles2_renderer_init();
+		if (!plane->wlr_rend)
+			return false;
+
+		plane->wlr_surf = wlr_render_surface_init(plane->wlr_rend);
+		if (!plane->wlr_surf)
 			return false;
 	}
 
-	return true;
+	wlr_drm_plane_make_current(renderer, plane);
+
+	wlr_surface_attach_pixels(plane->wlr_surf, WL_SHM_FORMAT_ARGB8888,
+		stride, width, height, buf);
+
+	glViewport(0, 0, plane->width, plane->height);
+	glClearColor(0, 0, 0, 0);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	float matrix[16];
+	wlr_surface_get_matrix(plane->wlr_surf, &matrix, &plane->matrix, 0, 0);
+	wlr_render_with_matrix(plane->wlr_rend, plane->wlr_surf, &matrix);
+
+	wlr_drm_plane_swap_buffers(renderer, plane);
+
+	return wlr_drm_crtc_set_cursor(drm, crtc);
 }
 
 static bool wlr_drm_output_move_cursor(struct wlr_output_state *output,
 		int x, int y) {
-	struct wlr_backend_state *state =
+	struct wlr_backend_state *drm =
-		wl_container_of(output->renderer, state, renderer);
+		wl_container_of(output->renderer, drm, renderer);
-	return !drmModeMoveCursor(state->fd, output->crtc->id, x, y);
+	return !drmModeMoveCursor(drm->fd, output->crtc->id, x, y);
 }
 
 static void wlr_drm_output_destroy(struct wlr_output_state *output) {
@@ -786,9 +810,14 @@ void wlr_drm_output_cleanup(struct wlr_output_state *output, bool restore) {
 			restore = false;
 		}
 
-		wlr_drm_plane_renderer_free(renderer, output->crtc->overlay);
+		struct wlr_drm_crtc *crtc = output->crtc;
-		wlr_drm_plane_renderer_free(renderer, output->crtc->primary);
+		for (int i = 0; i < 3; ++i) {
-		wlr_drm_plane_renderer_free(renderer, output->crtc->cursor);
+			wlr_drm_plane_renderer_free(renderer, crtc->planes[i]);
+			if (crtc->planes[i] && crtc->planes[i]->id == 0) {
+				free(crtc->planes[i]);
+				crtc->planes[i] = NULL;
+			}
+		}
 
 		output->crtc = NULL;
 		output->possible_crtc = 0;

backend/drm/drm.h

@@ -21,11 +21,9 @@
 struct wlr_drm_plane {
 	uint32_t type;
 	uint32_t id;
-	uint32_t fb_id;
 
 	uint32_t possible_crtcs;
 
-	int32_t x, y;
 	uint32_t width, height;
 
 	struct gbm_surface *gbm;
@@ -34,6 +32,11 @@ struct wlr_drm_plane {
 	struct gbm_bo *front;
 	struct gbm_bo *back;
 
+	// Only used by cursor
+	float matrix[16];
+	struct wlr_renderer *wlr_rend;
+	struct wlr_surface *wlr_surf;
+
 	union wlr_drm_plane_props props;
 };
 
@@ -159,5 +162,6 @@ void wlr_drm_scan_connectors(struct wlr_backend_state *state);
 int wlr_drm_event(int fd, uint32_t mask, void *data);
 
 void wlr_drm_output_start_renderer(struct wlr_output_state *output);
+bool wlr_drm_crtc_set_cursor(struct wlr_backend_state *drm, struct wlr_drm_crtc *crtc);
 
 #endif

include/wlr/render/matrix.h

@@ -1,10 +1,16 @@
 #ifndef _WLR_RENDER_MATRIX_H
 #define _WLR_RENDER_MATRIX_H
 
+#include <stdint.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_surface(float mat[static 16], int32_t width, int32_t height,
+		enum wl_output_transform transform);
+
 #endif

render/matrix.c

@@ -1,5 +1,6 @@
 #include <string.h>
 #include <math.h>
+#include <wayland-server-protocol.h>
 #include <wlr/render/matrix.h>
 
 /* Obtains the index for the given row/column */
@@ -81,3 +82,62 @@ void wlr_matrix_mul(const float (*x)[16], const float (*y)[16], float (*product)
 	};
 	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,
+	},
+};
+
+// Equivilent to glOrtho(0, width, 0, height, 1, -1) with the transform applied
+void wlr_matrix_surface(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 + relection
+	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;
+}

types/wlr_output.c

@@ -88,67 +88,8 @@ struct wl_global *wlr_output_create_global(
 	return wl_global;
 }
 
-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,
-	},
-};
-
-// Equivilent to glOrtho(0, width, 0, height, 1, -1) with the transform applied
-static void set_matrix(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 + relection
-	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_output_update_matrix(struct wlr_output *output) {
-	set_matrix(output->transform_matrix, output->width, output->height, output->transform);
+	wlr_matrix_surface(output->transform_matrix, output->width, output->height, output->transform);
 }
 
 struct wlr_output *wlr_output_create(struct wlr_output_impl *impl,