[gnome-photos/wip/rishi/buffer-decoder: 21/23] Add convenience APIs
- From: Debarshi Ray <debarshir src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gnome-photos/wip/rishi/buffer-decoder: 21/23] Add convenience APIs
- Date: Tue, 18 Sep 2018 05:40:49 +0000 (UTC)
commit 1a22b5fedbcc8eea2cde5844b9d6010607292ebe
Author: Debarshi Ray <debarshir gnome org>
Date: Fri Jul 27 19:50:44 2018 +0200
Add convenience APIs
https://gitlab.gnome.org/GNOME/gnome-photos/issues/63
src/Makefile.am | 4 +
src/meson.build | 1 +
src/photos-gegl-buffer-io.c | 473 ++++++++++++++++++++++++++++++++++++++++++++
src/photos-gegl-buffer-io.h | 90 +++++++++
4 files changed, 568 insertions(+)
---
diff --git a/src/Makefile.am b/src/Makefile.am
index 3fbf8dde..602c0f36 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -110,6 +110,8 @@ gnome_photos_SOURCES = \
photos-gegl-buffer-codec-jpeg.h \
photos-gegl-buffer-codec-png.c \
photos-gegl-buffer-codec-png.h \
+ photos-gegl-buffer-io.c \
+ photos-gegl-buffer-io.h \
photos-gegl-buffer-loader.c \
photos-gegl-buffer-loader.h \
photos-gegl-buffer-loader-builder.c \
@@ -338,6 +340,8 @@ gnome_photos_thumbnailer_SOURCES = \
photos-gegl-buffer-codec-jpeg.h \
photos-gegl-buffer-codec-png.c \
photos-gegl-buffer-codec-png.h \
+ photos-gegl-buffer-io.c \
+ photos-gegl-buffer-io.h \
photos-gegl-buffer-loader.c \
photos-gegl-buffer-loader.h \
photos-gegl-buffer-loader-builder.c \
diff --git a/src/meson.build b/src/meson.build
index 3412a5d1..de57cd59 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -5,6 +5,7 @@ common_sources = files(
'photos-gegl-buffer-codec.c',
'photos-gegl-buffer-codec-jpeg.c',
'photos-gegl-buffer-codec-png.c',
+ 'photos-gegl-buffer-io.c',
'photos-gegl-buffer-loader.c',
'photos-gegl-buffer-loader-builder.c',
'photos-glib.c',
diff --git a/src/photos-gegl-buffer-io.c b/src/photos-gegl-buffer-io.c
new file mode 100644
index 00000000..b09dc501
--- /dev/null
+++ b/src/photos-gegl-buffer-io.c
@@ -0,0 +1,473 @@
+/*
+ * Photos - access, organize and share your photos on GNOME
+ * Copyright © 1999 The Free Software Foundation
+ * Copyright © 2018 Red Hat, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Based on code from:
+ * + GdkPixbuf
+ */
+
+
+#include "config.h"
+
+#include "photos-gegl-buffer-io.h"
+#include "photos-gegl-buffer-loader.h"
+#include "photos-gegl-buffer-loader-builder.h"
+
+
+enum
+{
+ LOAD_BUFFER_SIZE = 32768
+};
+
+
+static GeglBuffer *
+photos_gegl_buffer_load_from_stream (PhotosGeglBufferLoader *loader,
+ GInputStream *stream,
+ GCancellable *cancellable,
+ GError **error)
+{
+ GeglBuffer *ret_val = NULL;
+
+ while (TRUE)
+ {
+ g_autoptr (GBytes) bytes = NULL;
+ gsize size;
+
+ bytes = g_input_stream_read_bytes (stream, LOAD_BUFFER_SIZE, cancellable, error);
+ if (bytes == NULL)
+ {
+ photos_gegl_buffer_loader_close (loader, NULL);
+ goto out;
+ }
+
+ size = g_bytes_get_size (bytes);
+ if (size == 0)
+ break;
+
+ if (!photos_gegl_buffer_loader_write_bytes (loader, bytes, cancellable, error))
+ {
+ photos_gegl_buffer_loader_close (loader, NULL);
+ goto out;
+ }
+ }
+
+ if (!photos_gegl_buffer_loader_close (loader, error))
+ goto out;
+
+ ret_val = photos_gegl_buffer_loader_get_buffer (loader);
+ g_object_ref (ret_val);
+
+ out:
+ return ret_val;
+}
+
+
+static void
+photos_gegl_buffer_new_from_stream_read_bytes (GObject *source_object, GAsyncResult *res, gpointer user_data)
+{
+ g_autoptr (GBytes) bytes = NULL;
+ GCancellable *cancellable;
+ GInputStream *stream = G_INPUT_STREAM (source_object);
+ g_autoptr (GTask) task = G_TASK (user_data);
+ PhotosGeglBufferLoader *loader;
+ gint priority;
+ gsize size;
+
+ cancellable = g_task_get_cancellable (task);
+ loader = PHOTOS_GEGL_BUFFER_LOADER (g_task_get_source_object (task));
+ priority = GPOINTER_TO_INT (g_task_get_task_data (task));
+
+ {
+ g_autoptr (GError) error = NULL;
+
+ bytes = g_input_stream_read_bytes_finish (stream, res, &error);
+ if (error != NULL)
+ {
+ photos_gegl_buffer_loader_close (loader, NULL);
+ g_task_return_error (task, g_steal_pointer (&error));
+ goto out;
+ }
+ }
+
+ size = g_bytes_get_size (bytes);
+ if (size > 0)
+ {
+ {
+ g_autoptr (GError) error = NULL;
+
+ if (!photos_gegl_buffer_loader_write_bytes (loader, bytes, cancellable, &error))
+ {
+ photos_gegl_buffer_loader_close (loader, NULL);
+ g_task_return_error (task, g_steal_pointer (&error));
+ goto out;
+ }
+ }
+
+ g_input_stream_read_bytes_async (stream,
+ LOAD_BUFFER_SIZE,
+ priority,
+ cancellable,
+ photos_gegl_buffer_new_from_stream_read_bytes,
+ g_object_ref (task));
+ }
+ else
+ {
+ GeglBuffer *buffer;
+
+ {
+ g_autoptr (GError) error = NULL;
+
+ if (!photos_gegl_buffer_loader_close (loader, &error))
+ {
+ g_task_return_error (task, g_steal_pointer (&error));
+ goto out;
+ }
+ }
+
+ buffer = photos_gegl_buffer_loader_get_buffer (loader);
+ g_task_return_pointer (task, g_object_ref (buffer), g_object_unref);
+ }
+
+ out:
+ return;
+}
+
+
+static void
+photos_gegl_buffer_new_from_file_read (GObject *source_object, GAsyncResult *res, gpointer user_data)
+{
+ GCancellable *cancellable;
+ GFile *file = G_FILE (source_object);
+ g_autoptr (GFileInputStream) stream = NULL;
+ g_autoptr (GTask) task = G_TASK (user_data);
+ gint priority;
+
+ cancellable = g_task_get_cancellable (task);
+ priority = GPOINTER_TO_INT (g_task_get_task_data (task));
+
+ {
+ g_autoptr (GError) error = NULL;
+
+ stream = g_file_read_finish (file, res, &error);
+ if (error != NULL)
+ {
+ g_task_return_error (task, g_steal_pointer (&error));
+ goto out;
+ }
+ }
+
+ g_input_stream_read_bytes_async (G_INPUT_STREAM (stream),
+ LOAD_BUFFER_SIZE,
+ priority,
+ cancellable,
+ photos_gegl_buffer_new_from_stream_read_bytes,
+ g_object_ref (task));
+
+ out:
+ return;
+}
+
+
+GeglBuffer *
+photos_gegl_buffer_new_from_file (GFile *file, GCancellable *cancellable, GError **error)
+{
+ g_autoptr (GFileInputStream) stream = NULL;
+ GeglBuffer *ret_val = NULL;
+ g_autoptr (GeglBuffer) buffer = NULL;
+ g_autoptr (PhotosGeglBufferLoader) loader = NULL;
+ g_autoptr (PhotosGeglBufferLoaderBuilder) builder = NULL;
+
+ g_return_val_if_fail (G_IS_FILE (file), NULL);
+ g_return_val_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable), NULL);
+ g_return_val_if_fail (error == NULL || *error == NULL, NULL);
+
+ stream = g_file_read (file, cancellable, error);
+ if (stream == NULL)
+ goto out;
+
+ builder = photos_gegl_buffer_loader_builder_new ();
+ photos_gegl_buffer_loader_builder_set_file (builder, file);
+ loader = photos_gegl_buffer_loader_builder_to_loader (builder);
+
+ buffer = photos_gegl_buffer_load_from_stream (loader, G_INPUT_STREAM (stream), cancellable, error);
+ if (buffer == NULL)
+ goto out;
+
+ ret_val = g_object_ref (buffer);
+
+ out:
+ return ret_val;
+}
+
+
+void
+photos_gegl_buffer_new_from_file_async (GFile *file,
+ gint priority,
+ GCancellable *cancellable,
+ GAsyncReadyCallback callback,
+ gpointer user_data)
+{
+ g_autoptr (GTask) task = NULL;
+ g_autoptr (PhotosGeglBufferLoader) loader = NULL;
+ g_autoptr (PhotosGeglBufferLoaderBuilder) builder = NULL;
+
+ g_return_if_fail (G_IS_FILE (file));
+ g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
+
+ builder = photos_gegl_buffer_loader_builder_new ();
+ photos_gegl_buffer_loader_builder_set_file (builder, file);
+ loader = photos_gegl_buffer_loader_builder_to_loader (builder);
+
+ task = g_task_new (loader, cancellable, callback, user_data);
+ g_task_set_source_tag (task, photos_gegl_buffer_new_from_file_async);
+ g_task_set_task_data (task, GINT_TO_POINTER (priority), NULL);
+
+ g_file_read_async (file, priority, cancellable, photos_gegl_buffer_new_from_file_read, g_object_ref
(task));
+}
+
+
+GeglBuffer *
+photos_gegl_buffer_new_from_file_at_scale (GFile *file,
+ gint width,
+ gint height,
+ gboolean preserve_aspect_ratio,
+ GCancellable *cancellable,
+ GError **error)
+{
+ g_autoptr (GFileInputStream) stream = NULL;
+ GeglBuffer *ret_val = NULL;
+ g_autoptr (GeglBuffer) buffer = NULL;
+ g_autoptr (PhotosGeglBufferLoader) loader = NULL;
+ g_autoptr (PhotosGeglBufferLoaderBuilder) builder = NULL;
+
+ g_return_val_if_fail (G_IS_FILE (file), NULL);
+ g_return_val_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable), NULL);
+ g_return_val_if_fail (error == NULL || *error == NULL, NULL);
+
+ stream = g_file_read (file, cancellable, error);
+ if (stream == NULL)
+ goto out;
+
+ builder = photos_gegl_buffer_loader_builder_new ();
+ photos_gegl_buffer_loader_builder_set_file (builder, file);
+ photos_gegl_buffer_loader_builder_set_height (builder, height);
+ photos_gegl_buffer_loader_builder_set_preserve_aspect_ratio (builder, preserve_aspect_ratio);
+ photos_gegl_buffer_loader_builder_set_width (builder, width);
+ loader = photos_gegl_buffer_loader_builder_to_loader (builder);
+
+ buffer = photos_gegl_buffer_load_from_stream (loader, G_INPUT_STREAM (stream), cancellable, error);
+ if (buffer == NULL)
+ goto out;
+
+ ret_val = g_object_ref (buffer);
+
+ out:
+ return ret_val;
+}
+
+
+void
+photos_gegl_buffer_new_from_file_at_scale_async (GFile *file,
+ gint width,
+ gint height,
+ gboolean preserve_aspect_ratio,
+ gint priority,
+ GCancellable *cancellable,
+ GAsyncReadyCallback callback,
+ gpointer user_data)
+{
+ g_autoptr (GTask) task = NULL;
+ g_autoptr (PhotosGeglBufferLoader) loader = NULL;
+ g_autoptr (PhotosGeglBufferLoaderBuilder) builder = NULL;
+
+ g_return_if_fail (G_IS_FILE (file));
+ g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
+
+ builder = photos_gegl_buffer_loader_builder_new ();
+ photos_gegl_buffer_loader_builder_set_file (builder, file);
+ photos_gegl_buffer_loader_builder_set_height (builder, height);
+ photos_gegl_buffer_loader_builder_set_preserve_aspect_ratio (builder, preserve_aspect_ratio);
+ photos_gegl_buffer_loader_builder_set_width (builder, width);
+ loader = photos_gegl_buffer_loader_builder_to_loader (builder);
+
+ task = g_task_new (loader, cancellable, callback, user_data);
+ g_task_set_source_tag (task, photos_gegl_buffer_new_from_file_at_scale_async);
+ g_task_set_task_data (task, GINT_TO_POINTER (priority), NULL);
+
+ g_file_read_async (file, priority, cancellable, photos_gegl_buffer_new_from_file_read, g_object_ref
(task));
+}
+
+
+GeglBuffer *
+photos_gegl_buffer_new_from_file_finish (GAsyncResult *res, GError **error)
+{
+ GTask *task;
+
+ g_return_val_if_fail (G_IS_TASK (res), NULL);
+ task = G_TASK (res);
+
+ g_return_val_if_fail (g_task_get_source_tag (task) == photos_gegl_buffer_new_from_file_async
+ || g_task_get_source_tag (task) == photos_gegl_buffer_new_from_file_at_scale_async,
+ NULL);
+ g_return_val_if_fail (error == NULL || *error == NULL, NULL);
+
+ return g_task_propagate_pointer (task, error);
+}
+
+
+GeglBuffer *
+photos_gegl_buffer_new_from_stream (GInputStream *stream, GCancellable *cancellable, GError **error)
+{
+ GeglBuffer *ret_val = NULL;
+ g_autoptr (GeglBuffer) buffer = NULL;
+ g_autoptr (PhotosGeglBufferLoader) loader = NULL;
+ g_autoptr (PhotosGeglBufferLoaderBuilder) builder = NULL;
+
+ g_return_val_if_fail (G_IS_INPUT_STREAM (stream), NULL);
+ g_return_val_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable), NULL);
+ g_return_val_if_fail (error == NULL || *error == NULL, NULL);
+
+ builder = photos_gegl_buffer_loader_builder_new ();
+ loader = photos_gegl_buffer_loader_builder_to_loader (builder);
+
+ buffer = photos_gegl_buffer_load_from_stream (loader, stream, cancellable, error);
+ if (buffer == NULL)
+ goto out;
+
+ ret_val = g_object_ref (buffer);
+
+ out:
+ return ret_val;
+}
+
+
+void
+photos_gegl_buffer_new_from_stream_async (GInputStream *stream,
+ gint priority,
+ GCancellable *cancellable,
+ GAsyncReadyCallback callback,
+ gpointer user_data)
+{
+ g_autoptr (GTask) task = NULL;
+ g_autoptr (PhotosGeglBufferLoader) loader = NULL;
+ g_autoptr (PhotosGeglBufferLoaderBuilder) builder = NULL;
+
+ g_return_if_fail (G_IS_INPUT_STREAM (stream));
+ g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
+
+ builder = photos_gegl_buffer_loader_builder_new ();
+ loader = photos_gegl_buffer_loader_builder_to_loader (builder);
+
+ task = g_task_new (loader, cancellable, callback, user_data);
+ g_task_set_source_tag (task, photos_gegl_buffer_new_from_stream_async);
+ g_task_set_task_data (task, GINT_TO_POINTER (priority), NULL);
+
+ g_input_stream_read_bytes_async (stream,
+ LOAD_BUFFER_SIZE,
+ priority,
+ cancellable,
+ photos_gegl_buffer_new_from_stream_read_bytes,
+ g_object_ref (task));
+}
+
+
+GeglBuffer *
+photos_gegl_buffer_new_from_stream_at_scale (GInputStream *stream,
+ gint width,
+ gint height,
+ gboolean preserve_aspect_ratio,
+ GCancellable *cancellable,
+ GError **error)
+{
+ GeglBuffer *ret_val = NULL;
+ g_autoptr (GeglBuffer) buffer = NULL;
+ g_autoptr (PhotosGeglBufferLoader) loader = NULL;
+ g_autoptr (PhotosGeglBufferLoaderBuilder) builder = NULL;
+
+ g_return_val_if_fail (G_IS_INPUT_STREAM (stream), NULL);
+ g_return_val_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable), NULL);
+ g_return_val_if_fail (error == NULL || *error == NULL, NULL);
+
+ builder = photos_gegl_buffer_loader_builder_new ();
+ photos_gegl_buffer_loader_builder_set_height (builder, height);
+ photos_gegl_buffer_loader_builder_set_preserve_aspect_ratio (builder, preserve_aspect_ratio);
+ photos_gegl_buffer_loader_builder_set_width (builder, width);
+ loader = photos_gegl_buffer_loader_builder_to_loader (builder);
+
+ buffer = photos_gegl_buffer_load_from_stream (loader, stream, cancellable, error);
+ if (buffer == NULL)
+ goto out;
+
+ ret_val = g_object_ref (buffer);
+
+ out:
+ return ret_val;
+}
+
+
+void
+photos_gegl_buffer_new_from_stream_at_scale_async (GInputStream *stream,
+ gint width,
+ gint height,
+ gboolean preserve_aspect_ratio,
+ gint priority,
+ GCancellable *cancellable,
+ GAsyncReadyCallback callback,
+ gpointer user_data)
+{
+ g_autoptr (GTask) task = NULL;
+ g_autoptr (PhotosGeglBufferLoader) loader = NULL;
+ g_autoptr (PhotosGeglBufferLoaderBuilder) builder = NULL;
+
+ g_return_if_fail (G_IS_INPUT_STREAM (stream));
+ g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
+
+ builder = photos_gegl_buffer_loader_builder_new ();
+ photos_gegl_buffer_loader_builder_set_height (builder, height);
+ photos_gegl_buffer_loader_builder_set_preserve_aspect_ratio (builder, preserve_aspect_ratio);
+ photos_gegl_buffer_loader_builder_set_width (builder, width);
+ loader = photos_gegl_buffer_loader_builder_to_loader (builder);
+
+ task = g_task_new (loader, cancellable, callback, user_data);
+ g_task_set_source_tag (task, photos_gegl_buffer_new_from_stream_at_scale_async);
+ g_task_set_task_data (task, GINT_TO_POINTER (priority), NULL);
+
+ g_input_stream_read_bytes_async (stream,
+ LOAD_BUFFER_SIZE,
+ priority,
+ cancellable,
+ photos_gegl_buffer_new_from_stream_read_bytes,
+ g_object_ref (task));
+}
+
+
+GeglBuffer *
+photos_gegl_buffer_new_from_stream_finish (GAsyncResult *res, GError **error)
+{
+ GTask *task;
+
+ g_return_val_if_fail (G_IS_TASK (res), NULL);
+ task = G_TASK (res);
+
+ g_return_val_if_fail (g_task_get_source_tag (task) == photos_gegl_buffer_new_from_stream_async
+ || g_task_get_source_tag (task) == photos_gegl_buffer_new_from_stream_at_scale_async,
+ NULL);
+ g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
+
+ return g_task_propagate_pointer (task, error);
+}
diff --git a/src/photos-gegl-buffer-io.h b/src/photos-gegl-buffer-io.h
new file mode 100644
index 00000000..24ddc896
--- /dev/null
+++ b/src/photos-gegl-buffer-io.h
@@ -0,0 +1,90 @@
+/*
+ * Photos - access, organize and share your photos on GNOME
+ * Copyright © 1999 The Free Software Foundation
+ * Copyright © 2018 Red Hat, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Based on code from:
+ * + GdkPixbuf
+ */
+
+#ifndef PHOTOS_GEGL_BUFFER_IO_H
+#define PHOTOS_GEGL_BUFFER_IO_H
+
+#include <gegl.h>
+#include <gio/gio.h>
+
+G_BEGIN_DECLS
+
+GeglBuffer *photos_gegl_buffer_new_from_file (GFile *file,
+ GCancellable *cancellable,
+ GError **error);
+
+void photos_gegl_buffer_new_from_file_async (GFile *file,
+ gint priority,
+ GCancellable *cancellable,
+ GAsyncReadyCallback callback,
+ gpointer user_data);
+
+GeglBuffer *photos_gegl_buffer_new_from_file_at_scale (GFile *file,
+ gint width,
+ gint height,
+ gboolean preserve_aspect_ratio,
+ GCancellable *cancellable,
+ GError **error);
+
+void photos_gegl_buffer_new_from_file_at_scale_async (GFile *file,
+ gint width,
+ gint height,
+ gboolean preserve_aspect_ratio,
+ gint priority,
+ GCancellable *cancellable,
+ GAsyncReadyCallback callback,
+ gpointer user_data);
+
+GeglBuffer *photos_gegl_buffer_new_from_file_finish (GAsyncResult *res, GError **error);
+
+GeglBuffer *photos_gegl_buffer_new_from_stream (GInputStream *stream,
+ GCancellable *cancellable,
+ GError **error);
+
+void photos_gegl_buffer_new_from_stream_async (GInputStream *stream,
+ gint priority,
+ GCancellable *cancellable,
+ GAsyncReadyCallback callback,
+ gpointer user_data);
+
+GeglBuffer *photos_gegl_buffer_new_from_stream_at_scale (GInputStream *stream,
+ gint width,
+ gint height,
+ gboolean preserve_aspect_ratio,
+ GCancellable *cancellable,
+ GError **error);
+
+void photos_gegl_buffer_new_from_stream_at_scale_async (GInputStream *stream,
+ gint width,
+ gint height,
+ gboolean preserve_aspect_ratio,
+ gint priority,
+ GCancellable *cancellable,
+ GAsyncReadyCallback callback,
+ gpointer user_data);
+
+GeglBuffer *photos_gegl_buffer_new_from_stream_finish (GAsyncResult *res, GError **error);
+
+G_END_DECLS
+
+#endif /* PHOTOS_GEGL_BUFFER_IO_H */
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