Move buffer creation and buffer details into drm.c and shm.c

compositor/compositor-drm.c

@@ -355,6 +355,12 @@ drm_compositor_create(struct wl_display *display, int connector)
 		return NULL;
 	}
 
+	ec->base.destroy = drm_destroy;
+	ec->base.authenticate = drm_authenticate;
+	ec->base.present = drm_compositor_present;
+	ec->base.create_buffer = wlsc_drm_buffer_create;
+	ec->base.focus = 1;
+
 	/* Can't init base class until we have a current egl context */
 	if (wlsc_compositor_init(&ec->base, display) < 0)
 		return NULL;
@@ -371,10 +377,6 @@ drm_compositor_create(struct wl_display *display, int connector)
 		wl_event_loop_add_fd(loop, ec->base.drm.fd,
 				     WL_EVENT_READABLE, on_drm_input, ec);
 	ec->tty = tty_create(&ec->base);
-	ec->base.destroy = drm_destroy;
-	ec->base.authenticate = drm_authenticate;
-	ec->base.present = drm_compositor_present;
-	ec->base.focus = 1;
 
 	return &ec->base;
 }

compositor/compositor-wayland.c

@@ -278,9 +278,7 @@ wayland_compositor_create_output(struct wayland_compositor *c,
 static struct wl_buffer *
 create_invisible_pointer(struct wayland_compositor *c)
 {
-	struct wlsc_drm_buffer *wlsc_buffer;
 	struct wl_buffer *buffer;
-	int name, stride;
 	struct wl_visual *visual;
 	GLuint texture;
 	const int width = 1, height = 1;
@@ -294,18 +292,8 @@ create_invisible_pointer(struct wayland_compositor *c)
 	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 
 	visual = wl_display_get_premultiplied_argb_visual(c->parent.display);
-	wlsc_buffer = wlsc_drm_buffer_create(&c->base, width, height, visual);
+	buffer = c->base.create_buffer(&c->base, width, height, visual, data);
 
-	glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, wlsc_buffer->image);
-	glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height,
-			GL_RGBA, GL_UNSIGNED_BYTE, data);
-
-	eglExportDRMImageMESA(c->base.display, wlsc_buffer->image,
-			      &name, NULL, &stride);
-
-	buffer = wl_drm_create_buffer(c->parent.drm, name,
-				      width, height,
-				      stride, visual);
 	return buffer;
 }
 

compositor/compositor-x11.c

@@ -676,6 +676,11 @@ x11_compositor_create(struct wl_display *display, int width, int height)
 	if (x11_compositor_init_egl(c) < 0)
 		return NULL;
 
+	c->base.destroy = x11_destroy;
+	c->base.authenticate = x11_authenticate;
+	c->base.present = x11_compositor_present;
+	c->base.create_buffer = wlsc_drm_buffer_create;
+
 	/* Can't init base class until we have a current egl context */
 	if (wlsc_compositor_init(&c->base, display) < 0)
 		return NULL;
@@ -693,9 +698,5 @@ x11_compositor_create(struct wl_display *display, int width, int height)
 				     WL_EVENT_READABLE,
 				     x11_compositor_handle_event, c);
 
-	c->base.destroy = x11_destroy;
-	c->base.authenticate = x11_authenticate;
-	c->base.present = x11_compositor_present;
-
 	return &c->base;
 }

compositor/compositor.c

@@ -188,33 +188,76 @@ destroy_surface(struct wl_resource *resource, struct wl_client *client)
 	wlsc_compositor_schedule_repaint(compositor);
 }
 
-static int
-texture_from_png(const char *filename, int width, int height)
+static struct wl_buffer *
+create_buffer_from_png(struct wlsc_compositor *ec,
+		       const char *filename, int width, int height)
 {
 	GdkPixbuf *pixbuf;
 	GError *error = NULL;
-	void *data;
-	GLenum format;
+	int stride, i, n_channels;
+	unsigned char *pixels, *end, *argb_pixels, *s, *d;
+	struct wl_buffer *buffer;
 
 	pixbuf = gdk_pixbuf_new_from_file_at_scale(filename,
 						   width, height,
 						   FALSE, &error);
 	if (error != NULL)
-		return -1;
+		return NULL;
 
-	data = gdk_pixbuf_get_pixels(pixbuf);
+	stride = gdk_pixbuf_get_rowstride(pixbuf);
+	pixels = gdk_pixbuf_get_pixels(pixbuf);
+	n_channels = gdk_pixbuf_get_n_channels(pixbuf);
 
-	if (gdk_pixbuf_get_has_alpha(pixbuf))
-		format = GL_RGBA;
-	else
-		format = GL_RGB;
+	argb_pixels = malloc (height * width * 4);
+	if (argb_pixels == NULL) {
+		gdk_pixbuf_unref(pixbuf);
+		return NULL;
+	}
 
-	glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height,
-			format, GL_UNSIGNED_BYTE, data);
+	if (n_channels == 4) {
+		for (i = 0; i < height; i++) {
+			s = pixels + i * stride;
+			end = s + width * 4;
+			d = argb_pixels + i * width * 4;
+			while (s < end) {
+				unsigned int t;
+
+#define MULT(_d,c,a,t) \
+	do { t = c * a + 0x7f; _d = ((t >> 8) + t) >> 8; } while (0)
+				
+				MULT(d[0], s[2], s[3], t);
+				MULT(d[1], s[1], s[3], t);
+				MULT(d[2], s[0], s[3], t);
+				d[3] = s[3];
+				s += 4;
+				d += 4;
+			}
+		}
+	} else if (n_channels == 3) {
+		for (i = 0; i < height; i++) {
+			s = pixels + i * stride;
+			end = s + width * 3;
+			d = argb_pixels + i * width * 4;
+			while (s < end) {
+				d[0] = s[2];
+				d[1] = s[1];
+				d[2] = s[0];
+				d[3] = 0xff;
+				s += 3;
+				d += 4;
+			}
+		}
+	}
 
 	gdk_pixbuf_unref(pixbuf);
 
-	return 0;
+	buffer = ec->create_buffer(ec, width, height,
+				   &ec->compositor.premultiplied_argb_visual,
+				   argb_pixels);
+
+	free(argb_pixels);
+
+	return buffer;
 }
 
 static const struct {
@@ -238,25 +281,15 @@ static void
 create_pointer_images(struct wlsc_compositor *ec)
 {
 	int i, count;
-	GLuint texture;
 	const int width = 32, height = 32;
 
-	glGenTextures(1, &texture);
-	glBindTexture(GL_TEXTURE_2D, texture);
-	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
-	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-
 	count = ARRAY_LENGTH(pointer_images);
 	ec->pointer_buffers = malloc(count * sizeof *ec->pointer_buffers);
 	for (i = 0; i < count; i++) {
 		ec->pointer_buffers[i] =
-			wlsc_drm_buffer_create(ec, width, height,
-					       &ec->compositor.argb_visual);
-		glEGLImageTargetTexture2DOES(GL_TEXTURE_2D,
-					     ec->pointer_buffers[i]->image);
-		texture_from_png(pointer_images[i].filename, width, height);
+			create_buffer_from_png(ec,
+					       pointer_images[i].filename,
+					       width, height);
 	}
 }
 
@@ -264,37 +297,20 @@ static struct wlsc_surface *
 background_create(struct wlsc_output *output, const char *filename)
 {
 	struct wlsc_surface *background;
-	GdkPixbuf *pixbuf;
-	GError *error = NULL;
-	void *data;
-	GLenum format;
+	struct wlsc_compositor *ec = output->compositor;
+	struct wl_buffer *buffer;
 
 	background = wlsc_surface_create(output->compositor,
-					 &output->compositor->compositor.rgb_visual,
+					 &ec->compositor.premultiplied_argb_visual,
 					 output->x, output->y,
 					 output->width, output->height);
 	if (background == NULL)
 		return NULL;
 
-	pixbuf = gdk_pixbuf_new_from_file_at_scale(filename,
-						   output->width,
-						   output->height,
-						   FALSE, &error);
-	if (error != NULL) {
-		free(background);
-		return NULL;
-	}
-
-	data = gdk_pixbuf_get_pixels(pixbuf);
-
-	if (gdk_pixbuf_get_has_alpha(pixbuf))
-		format = GL_RGBA;
-	else
-		format = GL_RGB;
-
-	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
-		     output->width, output->height, 0,
-		     format, GL_UNSIGNED_BYTE, data);
+	buffer = create_buffer_from_png(output->compositor,
+					filename,
+					output->width, output->height);
+	buffer->attach(buffer, &background->surface);
 
 	return background;
 }
@@ -500,7 +516,7 @@ wlsc_input_device_set_pointer_image(struct wlsc_input_device *device,
 		(struct wlsc_compositor *) device->input_device.compositor;
 
 	wlsc_input_device_attach(device,
-				 &compositor->pointer_buffers[type]->buffer,
+				 compositor->pointer_buffers[type],
 				 pointer_images[type].hotspot_x,
 				 pointer_images[type].hotspot_y);
 }

compositor/compositor.h

@@ -77,21 +77,10 @@ struct wlsc_drm {
 	char *filename;
 };
 
-struct wlsc_drm_buffer {
-	struct wl_buffer buffer;
-	EGLImageKHR image;
-};
-
 struct wlsc_shm {
 	struct wl_object object;
 };
 
-struct wlsc_shm_buffer {
-	struct wl_buffer buffer;
-	int32_t stride;
-	void *data;
-};
-
 struct wlsc_compositor {
 	struct wl_compositor compositor;
 
@@ -101,7 +90,7 @@ struct wlsc_compositor {
 	EGLContext context;
 	GLuint fbo, vbo;
 	GLuint proj_uniform, tex_uniform;
-	struct wlsc_drm_buffer **pointer_buffers;
+	struct wl_buffer **pointer_buffers;
 	struct wl_display *wl_display;
 
 	/* We implement the shell interface. */
@@ -125,6 +114,10 @@ struct wlsc_compositor {
 	void (*destroy)(struct wlsc_compositor *ec);
 	int (*authenticate)(struct wlsc_compositor *c, uint32_t id);
 	void (*present)(struct wlsc_compositor *c);
+	struct wl_buffer *(*create_buffer)(struct wlsc_compositor *c,
+					   int32_t width, int32_t height,
+					   struct wl_visual *visual,
+					   const void *data);
 };
 
 #define MODIFIER_CTRL	(1 << 8)
@@ -163,9 +156,10 @@ wlsc_compositor_finish_frame(struct wlsc_compositor *compositor, int msecs);
 void
 wlsc_compositor_schedule_repaint(struct wlsc_compositor *compositor);
 
-struct wlsc_drm_buffer *
+struct wl_buffer *
 wlsc_drm_buffer_create(struct wlsc_compositor *ec,
-		       int width, int height, struct wl_visual *visual);
+		       int width, int height,
+		       struct wl_visual *visual, const void *data);
 
 int
 wlsc_compositor_init(struct wlsc_compositor *ec, struct wl_display *display);

compositor/drm.c

@@ -22,6 +22,11 @@
 
 #include "compositor.h"
 
+struct wlsc_drm_buffer {
+	struct wl_buffer buffer;
+	EGLImageKHR image;
+};
+
 static void
 drm_authenticate(struct wl_client *client,
 		 struct wl_drm *drm_base, uint32_t id)
@@ -197,12 +202,13 @@ wlsc_drm_init(struct wlsc_compositor *ec, int fd, const char *filename)
 	return 0;
 }
 
-struct wlsc_drm_buffer *
-wlsc_drm_buffer_create(struct wlsc_compositor *ec,
-		       int width, int height, struct wl_visual *visual)
+struct wl_buffer *
+wlsc_drm_buffer_create(struct wlsc_compositor *ec, int width, int height,
+		       struct wl_visual *visual, const void *data)
 {
 	struct wlsc_drm_buffer *buffer;
 	EGLImageKHR image;
+	GLuint texture;
 
 	EGLint image_attribs[] = {
 		EGL_WIDTH,		0,
@@ -222,5 +228,19 @@ wlsc_drm_buffer_create(struct wlsc_compositor *ec,
 	buffer = wlsc_drm_buffer_create_for_image(ec, image,
 						  width, height, visual);
 
-	return buffer;
+	glGenTextures(1, &texture);
+	glBindTexture(GL_TEXTURE_2D, texture);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+	glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, buffer->image);
+
+	glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height,
+			GL_BGRA_EXT, GL_UNSIGNED_BYTE, data);
+
+	glDeleteTextures(1, &texture);
+
+	return &buffer->buffer;
 }

compositor/shm.c

@@ -24,6 +24,12 @@
 
 #include "compositor.h"
 
+struct wlsc_shm_buffer {
+	struct wl_buffer buffer;
+	int32_t stride;
+	void *data;
+};
+
 static void
 destroy_buffer(struct wl_resource *resource, struct wl_client *client)
 {