gstreamer/subprojects/gst-plugins-bad/sys/dwrite/gstdwriterender.cpp

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/* GStreamer
* Copyright (C) 2024 Seungha Yang <seungha@centricular.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstdwriterender.h"
GST_DEBUG_CATEGORY_EXTERN (dwrite_overlay_object_debug);
#define GST_CAT_DEFAULT dwrite_overlay_object_debug
static gboolean gst_dwrite_render_upload_default (GstDWriteRender * render,
const GstVideoInfo * info, GstBuffer * in_buf, GstBuffer * out_buf);
#define gst_dwrite_render_parent_class parent_class
G_DEFINE_ABSTRACT_TYPE (GstDWriteRender, gst_dwrite_render, GST_TYPE_OBJECT);
static void
gst_dwrite_render_class_init (GstDWriteRenderClass * klass)
{
klass->upload = gst_dwrite_render_upload_default;
}
static void
gst_dwrite_render_init (GstDWriteRender * self)
{
}
GstBuffer *
gst_dwrite_render_draw_layout (GstDWriteRender * render,
IDWriteTextLayout * layout, gint x, gint y)
{
auto klass = GST_DWRITE_RENDER_GET_CLASS (render);
return klass->draw_layout (render, layout, x, y);
}
gboolean
gst_dwrite_render_blend (GstDWriteRender * render, GstBuffer * layout_buf,
gint x, gint y, GstBuffer * output)
{
auto klass = GST_DWRITE_RENDER_GET_CLASS (render);
return klass->blend (render, layout_buf, x, y, output);
}
gboolean
gst_dwrite_render_update_device (GstDWriteRender * render, GstBuffer * buffer)
{
auto klass = GST_DWRITE_RENDER_GET_CLASS (render);
return klass->update_device (render, buffer);
}
gboolean
gst_dwrite_render_handle_allocation_query (GstDWriteRender * render,
GstElement * elem, GstQuery * query)
{
auto klass = GST_DWRITE_RENDER_GET_CLASS (render);
return klass->handle_allocation_query (render, elem, query);
}
gboolean
gst_dwrite_render_can_inplace (GstDWriteRender * render, GstBuffer * buffer)
{
auto klass = GST_DWRITE_RENDER_GET_CLASS (render);
return klass->can_inplace (render, buffer);
}
static gboolean
gst_dwrite_render_upload_default (GstDWriteRender * self,
const GstVideoInfo * info, GstBuffer * in_buf, GstBuffer * out_buf)
{
GstVideoFrame in_frame, out_frame;
gboolean ret;
GST_TRACE_OBJECT (self, "system copy");
if (!gst_video_frame_map (&in_frame, info, in_buf, GST_MAP_READ)) {
GST_ERROR_OBJECT (self, "Couldn't map input frame");
return FALSE;
}
if (!gst_video_frame_map (&out_frame, info, out_buf, GST_MAP_WRITE)) {
gst_video_frame_unmap (&in_frame);
GST_ERROR_OBJECT (self, "Couldn't map output frame");
return FALSE;
}
ret = gst_video_frame_copy (&out_frame, &in_frame);
gst_video_frame_unmap (&in_frame);
gst_video_frame_unmap (&out_frame);
return ret;
}
gboolean
gst_dwrite_render_upload (GstDWriteRender * render, const GstVideoInfo * info,
GstBuffer * in_buf, GstBuffer * out_buf)
{
auto klass = GST_DWRITE_RENDER_GET_CLASS (render);
return klass->upload (render, info, in_buf, out_buf);
}