shell-recorder: Support specifying the recorded area
Currently we will always record the entire screen. It has been requested to support recording a specified area analogous to the screenshot API as well, so add a set_area() method which allows this. https://bugzilla.gnome.org/show_bug.cgi?id=696247
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@ -50,6 +50,8 @@ struct _ShellRecorder {
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RecorderState state;
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ClutterStage *stage;
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gboolean custom_area;
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cairo_rectangle_int_t area;
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int stage_width;
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int stage_height;
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@ -429,10 +431,10 @@ recorder_draw_cursor (ShellRecorder *recorder,
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/* We don't show a cursor unless the hot spot is in the frame; this
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* means that sometimes we aren't going to draw a cursor even when
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* there is a little bit overlapping within the stage */
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if (recorder->pointer_x < 0 ||
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recorder->pointer_y < 0 ||
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recorder->pointer_x >= recorder->stage_width ||
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recorder->pointer_y >= recorder->stage_height)
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if (recorder->pointer_x < recorder->area.x ||
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recorder->pointer_y < recorder->area.y ||
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recorder->pointer_x >= recorder->area.x + recorder->area.width ||
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recorder->pointer_y >= recorder->area.y + recorder->area.height)
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return;
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if (!recorder->cursor_image)
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@ -444,15 +446,15 @@ recorder_draw_cursor (ShellRecorder *recorder,
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gst_buffer_map (buffer, &info, GST_MAP_WRITE);
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surface = cairo_image_surface_create_for_data (info.data,
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CAIRO_FORMAT_ARGB32,
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recorder->stage_width,
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recorder->stage_height,
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recorder->stage_width * 4);
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recorder->area.width,
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recorder->area.height,
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recorder->area.width * 4);
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cr = cairo_create (surface);
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cairo_set_source_surface (cr,
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recorder->cursor_image,
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recorder->pointer_x - recorder->cursor_hot_x,
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recorder->pointer_y - recorder->cursor_hot_y);
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recorder->pointer_x - recorder->cursor_hot_x - recorder->area.x,
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recorder->pointer_y - recorder->cursor_hot_y - recorder->area.y);
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cairo_paint (cr);
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cairo_destroy (cr);
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@ -555,12 +557,13 @@ recorder_record_frame (ShellRecorder *recorder)
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recorder->last_frame_time = now;
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size = recorder->stage_width * recorder->stage_height * 4;
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size = recorder->area.width * recorder->area.height * 4;
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data = g_malloc (recorder->stage_width * 4 * recorder->stage_height);
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cogl_read_pixels (0, 0, /* x/y */
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recorder->stage_width,
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recorder->stage_height,
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data = g_malloc (recorder->area.width * 4 * recorder->area.height);
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cogl_read_pixels (recorder->area.x,
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recorder->area.y,
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recorder->area.width,
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recorder->area.height,
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COGL_READ_PIXELS_COLOR_BUFFER,
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CLUTTER_CAIRO_FORMAT_ARGB32,
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data);
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@ -616,6 +619,14 @@ recorder_update_size (ShellRecorder *recorder)
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clutter_actor_get_allocation_box (CLUTTER_ACTOR (recorder->stage), &allocation);
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recorder->stage_width = (int)(0.5 + allocation.x2 - allocation.x1);
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recorder->stage_height = (int)(0.5 + allocation.y2 - allocation.y1);
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if (!recorder->custom_area)
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{
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recorder->area.x = 0;
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recorder->area.y = 0;
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recorder->area.width = recorder->stage_width;
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recorder->area.height = recorder->stage_height;
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}
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}
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static void
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@ -1126,8 +1137,8 @@ recorder_pipeline_set_caps (RecorderPipeline *pipeline)
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"bpp", G_TYPE_INT, 32,
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"depth", G_TYPE_INT, 24,
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"framerate", GST_TYPE_FRACTION, pipeline->recorder->framerate, 1,
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"width", G_TYPE_INT, pipeline->recorder->stage_width,
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"height", G_TYPE_INT, pipeline->recorder->stage_height,
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"width", G_TYPE_INT, pipeline->recorder->area.width,
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"height", G_TYPE_INT, pipeline->recorder->area.height,
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NULL);
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g_object_set (pipeline->src, "caps", caps, NULL);
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gst_caps_unref (caps);
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@ -1705,6 +1716,31 @@ shell_recorder_set_pipeline (ShellRecorder *recorder,
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recorder_set_pipeline (recorder, pipeline);
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}
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void
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shell_recorder_set_area (ShellRecorder *recorder,
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int x,
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int y,
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int width,
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int height)
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{
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g_return_if_fail (SHELL_IS_RECORDER (recorder));
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recorder->custom_area = TRUE;
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recorder->area.x = CLAMP (x, 0, recorder->stage_width);
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recorder->area.y = CLAMP (y, 0, recorder->stage_height);
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recorder->area.width = CLAMP (width,
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0, recorder->stage_width - recorder->area.x);
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recorder->area.height = CLAMP (height,
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0, recorder->stage_height - recorder->area.y);
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/* This breaks the recording but tweaking the GStreamer pipeline a bit
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* might make it work, at least if the codec can handle a stream where
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* the frame size changes in the middle.
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*/
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if (recorder->current_pipeline)
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recorder_pipeline_set_caps (recorder->current_pipeline);
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}
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/**
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* shell_recorder_record:
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* @recorder: the #ShellRecorder
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@ -36,6 +36,11 @@ void shell_recorder_set_file_template (ShellRecorder *recorder,
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const char *file_template);
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void shell_recorder_set_pipeline (ShellRecorder *recorder,
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const char *pipeline);
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void shell_recorder_set_area (ShellRecorder *recorder,
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int x,
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int y,
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int width,
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int height);
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gboolean shell_recorder_record (ShellRecorder *recorder,
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char **filename_used);
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void shell_recorder_close (ShellRecorder *recorder);
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