icon-loader: update PNG and XPM loaders to use new buffer helper

include/img/img-png.h

@@ -4,6 +4,7 @@
 
 struct lab_data_buffer;
 
-void img_png_load(const char *filename, struct lab_data_buffer **buffer);
+void img_png_load(const char *filename, struct lab_data_buffer **buffer,
+	int size, float scale);
 
 #endif /* LABWC_IMG_PNG_H */

include/img/img-xpm.h

@@ -4,6 +4,7 @@
 
 struct lab_data_buffer;
 
-void img_xpm_load(const char *filename, struct lab_data_buffer **buffer);
+void img_xpm_load(const char *filename, struct lab_data_buffer **buffer,
+	int size, float scale);
 
 #endif /* LABWC_IMG_XPM_H */

src/icon-loader.c

@@ -266,7 +266,7 @@ icon_loader_lookup(struct server *server, const char *app_id, int size,
 
 	switch (ctx.format) {
 	case SFDO_ICON_FILE_FORMAT_PNG:
-		img_png_load(ctx.path, &icon_buffer);
+		img_png_load(ctx.path, &icon_buffer, size, scale);
 		break;
 	case SFDO_ICON_FILE_FORMAT_SVG:
 #if HAVE_RSVG
@@ -274,7 +274,7 @@ icon_loader_lookup(struct server *server, const char *app_id, int size,
 #endif
 		break;
 	case SFDO_ICON_FILE_FORMAT_XPM:
-		img_xpm_load(ctx.path, &icon_buffer);
+		img_xpm_load(ctx.path, &icon_buffer, size, scale);
 		break;
 	}
 

src/img/img-png.c

@@ -43,7 +43,8 @@ ispng(const char *filename)
 #undef PNG_BYTES_TO_CHECK
 
 void
-img_png_load(const char *filename, struct lab_data_buffer **buffer)
+img_png_load(const char *filename, struct lab_data_buffer **buffer, int size,
+		float scale)
 {
 	if (*buffer) {
 		wlr_buffer_drop(&(*buffer)->base);
@@ -62,22 +63,6 @@ img_png_load(const char *filename, struct lab_data_buffer **buffer)
 		cairo_surface_destroy(image);
 		return;
 	}
-	cairo_surface_flush(image);
 
-	if (cairo_image_surface_get_format(image) == CAIRO_FORMAT_ARGB32) {
-		/* we can wrap ARGB32 image surfaces directly */
-		*buffer = buffer_adopt_cairo_surface(image);
-		return;
-	}
-
-	/* convert to ARGB32 by painting to a new surface */
-	uint32_t w = cairo_image_surface_get_width(image);
-	uint32_t h = cairo_image_surface_get_height(image);
-	*buffer = buffer_create_cairo(w, h, 1);
-	cairo_t *cairo = (*buffer)->cairo;
-	cairo_set_source_surface(cairo, image, 0, 0);
-	cairo_paint(cairo);
-	cairo_surface_flush((*buffer)->surface);
-	/* destroy original surface */
-	cairo_surface_destroy(image);
+	*buffer = buffer_convert_cairo_surface_for_icon(image, size, scale);
 }

src/img/img-xpm.c

@@ -286,9 +286,8 @@ file_buffer(enum buf_op op, struct file_handle *h)
 	return NULL;
 }
 
-/* This function does all the work. */
-static struct lab_data_buffer *
-pixbuf_create_from_xpm(struct file_handle *handle)
+static cairo_surface_t *
+xpm_load_to_surface(struct file_handle *handle)
 {
 	const char *buffer = file_buffer(op_header, handle);
 	if (!buffer) {
@@ -332,7 +331,7 @@ pixbuf_create_from_xpm(struct file_handle *handle)
 
 	char *name_buf = xzalloc(n_col * (cpp + 1));
 	struct xpm_color *colors = znew_n(struct xpm_color, n_col);
-	uint32_t *data = znew_n(uint32_t, w * h);
+	cairo_surface_t *surface = NULL;
 	struct xpm_color *fallbackcolor = NULL;
 	char pixel_str[32]; /* cpp < 32 */
 
@@ -357,14 +356,20 @@ pixbuf_create_from_xpm(struct file_handle *handle)
 		}
 	}
 
+	surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w, h);
+	uint32_t *data = (uint32_t *)cairo_image_surface_get_data(surface);
+	int stride = cairo_image_surface_get_stride(surface) / sizeof(uint32_t);
+
 	for (int ycnt = 0; ycnt < h; ycnt++) {
-		uint32_t *pixtmp = data + w * ycnt;
+		uint32_t *pixtmp = data + stride * ycnt;
 		int wbytes = w * cpp;
 
 		buffer = file_buffer(op_body, handle);
 		if (!buffer || (strlen(buffer) < (size_t)wbytes)) {
 			/* Advertised width doesn't match pixels */
 			wlr_log(WLR_DEBUG, "Dimensions do not match data");
+			cairo_surface_destroy(surface);
+			surface = NULL;
 			goto out;
 		}
 
@@ -382,24 +387,19 @@ pixbuf_create_from_xpm(struct file_handle *handle)
 			*pixtmp++ = color->argb;
 		}
 	}
-
-	g_hash_table_destroy(color_hash);
-	free(colors);
-	free(name_buf);
-
-	return buffer_create_from_data(data, w, h, 4 * w);
+	/* let cairo know pixel data has been modified */
+	cairo_surface_mark_dirty(surface);
 
 out:
 	g_hash_table_destroy(color_hash);
 	free(colors);
 	free(name_buf);
-	free(data);
-
-	return NULL;
+	return surface;
 }
 
 void
-img_xpm_load(const char *filename, struct lab_data_buffer **buffer)
+img_xpm_load(const char *filename, struct lab_data_buffer **buffer, int size,
+		float scale)
 {
 	if (*buffer) {
 		wlr_buffer_drop(&(*buffer)->base);
@@ -413,8 +413,11 @@ img_xpm_load(const char *filename, struct lab_data_buffer **buffer)
 		return;
 	}
 
-	*buffer = pixbuf_create_from_xpm(&h);
-	if (!(*buffer)) {
+	cairo_surface_t *surface = xpm_load_to_surface(&h);
+	if (surface) {
+		*buffer = buffer_convert_cairo_surface_for_icon(surface, size,
+			scale);
+	} else {
 		wlr_log(WLR_ERROR, "error loading '%s'", filename);
 	}
 

src/theme.c

@@ -246,19 +246,20 @@ load_button(struct theme *theme, struct button *b, int active)
 
 	zdrop(buffer);
 
+	int size = theme->title_height - 2 * theme->padding_height;
+	float scale = 1; /* TODO: account for output scale */
+
 	/* PNG */
 	get_button_filename(filename, sizeof(filename), b->name,
 		active ? "-active.png" : "-inactive.png");
-	img_png_load(filename, buffer);
+	img_png_load(filename, buffer, size, scale);
 
 #if HAVE_RSVG
 	/* SVG */
 	if (!*buffer) {
-		int size = theme->title_height - 2 * theme->padding_height;
 		get_button_filename(filename, sizeof(filename), b->name,
 			active ? "-active.svg" : "-inactive.svg");
-		/* TODO: account for output scale */
-		img_svg_load(filename, buffer, size, 1);
+		img_svg_load(filename, buffer, size, scale);
 	}
 #endif