backends: Add a native cursor renderer
This commit is contained in:
Jasper St. Pierre
208
src/backends/native/meta-cursor-renderer-native.c
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208
src/backends/native/meta-cursor-renderer-native.c
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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
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/*
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* Copyright (C) 2014 Red Hat
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*
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* Written by:
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* Jasper St. Pierre <jstpierre@mecheye.net>
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*/
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#include "config.h"
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#include "meta-cursor-renderer-native.h"
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#include <gbm.h>
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#include "meta-cursor-private.h"
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#include "meta-monitor-manager.h"
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struct _MetaCursorRendererNativePrivate
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{
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gboolean has_hw_cursor;
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int drm_fd;
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struct gbm_device *gbm;
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};
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typedef struct _MetaCursorRendererNativePrivate MetaCursorRendererNativePrivate;
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G_DEFINE_TYPE_WITH_PRIVATE (MetaCursorRendererNative, meta_cursor_renderer_native, META_TYPE_CURSOR_RENDERER);
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static void
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meta_cursor_renderer_native_finalize (GObject *object)
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{
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MetaCursorRendererNative *renderer = META_CURSOR_RENDERER_NATIVE (object);
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MetaCursorRendererNativePrivate *priv = meta_cursor_renderer_native_get_instance_private (renderer);
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if (priv->gbm)
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gbm_device_destroy (priv->gbm);
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G_OBJECT_CLASS (meta_cursor_renderer_native_parent_class)->finalize (object);
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}
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static void
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set_crtc_cursor (MetaCursorRendererNative *native,
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MetaCRTC *crtc,
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MetaCursorReference *cursor,
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gboolean force)
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{
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MetaCursorRendererNativePrivate *priv = meta_cursor_renderer_native_get_instance_private (native);
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if (crtc->cursor == cursor && !force)
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return;
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crtc->cursor = cursor;
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if (cursor)
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{
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struct gbm_bo *bo;
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union gbm_bo_handle handle;
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int width, height;
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int hot_x, hot_y;
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bo = meta_cursor_reference_get_gbm_bo (cursor, &hot_x, &hot_y);
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handle = gbm_bo_get_handle (bo);
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width = gbm_bo_get_width (bo);
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height = gbm_bo_get_height (bo);
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drmModeSetCursor2 (priv->drm_fd, crtc->crtc_id, handle.u32,
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width, height, hot_x, hot_y);
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}
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else
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{
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drmModeSetCursor2 (priv->drm_fd, crtc->crtc_id, 0, 0, 0, 0, 0);
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}
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}
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static void
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update_hw_cursor (MetaCursorRendererNative *native,
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gboolean force)
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{
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MetaCursorRendererNativePrivate *priv = meta_cursor_renderer_native_get_instance_private (native);
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MetaCursorRenderer *renderer = META_CURSOR_RENDERER (native);
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const MetaRectangle *cursor_rect = meta_cursor_renderer_get_rect (renderer);
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MetaCursorReference *cursor = meta_cursor_renderer_get_cursor (renderer);
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MetaMonitorManager *monitors;
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MetaCRTC *crtcs;
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unsigned int i, n_crtcs;
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monitors = meta_monitor_manager_get ();
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meta_monitor_manager_get_resources (monitors, NULL, NULL, &crtcs, &n_crtcs, NULL, NULL);
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for (i = 0; i < n_crtcs; i++)
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{
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gboolean crtc_should_have_cursor;
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MetaCursorReference *crtc_cursor;
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MetaRectangle *crtc_rect;
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crtc_rect = &crtcs[i].rect;
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crtc_should_have_cursor = (priv->has_hw_cursor && meta_rectangle_overlap (cursor_rect, crtc_rect));
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if (crtc_should_have_cursor)
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crtc_cursor = cursor;
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else
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crtc_cursor = NULL;
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set_crtc_cursor (native, &crtcs[i], crtc_cursor, force);
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if (cursor)
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{
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drmModeMoveCursor (priv->drm_fd, crtcs[i].crtc_id,
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cursor_rect->x - crtc_rect->x,
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cursor_rect->y - crtc_rect->y);
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}
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}
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}
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static gboolean
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should_have_hw_cursor (MetaCursorRenderer *renderer)
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{
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MetaCursorReference *cursor = meta_cursor_renderer_get_cursor (renderer);
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if (cursor)
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return (meta_cursor_reference_get_gbm_bo (cursor, NULL, NULL) != NULL);
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else
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return FALSE;
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}
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static void
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meta_cursor_renderer_native_update_cursor (MetaCursorRenderer *renderer)
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{
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MetaCursorRendererNative *native = META_CURSOR_RENDERER_NATIVE (renderer);
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MetaCursorRendererNativePrivate *priv = meta_cursor_renderer_native_get_instance_private (native);
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priv->has_hw_cursor = should_have_hw_cursor (renderer);
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update_hw_cursor (native, FALSE);
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/* Fall back to the stage-based cursor if we don't have HW cursors. */
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if (!priv->has_hw_cursor)
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META_CURSOR_RENDERER_CLASS (meta_cursor_renderer_native_parent_class)->update_cursor (renderer);
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}
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static void
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meta_cursor_renderer_native_class_init (MetaCursorRendererNativeClass *klass)
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{
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MetaCursorRendererClass *renderer_class = META_CURSOR_RENDERER_CLASS (klass);
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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object_class->finalize = meta_cursor_renderer_native_finalize;
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renderer_class->update_cursor = meta_cursor_renderer_native_update_cursor;
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}
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static void
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on_monitors_changed (MetaMonitorManager *monitors,
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MetaCursorRendererNative *native)
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{
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/* Our tracking is all messed up, so force an update. */
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update_hw_cursor (native, TRUE);
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}
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static void
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meta_cursor_renderer_native_init (MetaCursorRendererNative *native)
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{
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MetaCursorRendererNativePrivate *priv = meta_cursor_renderer_native_get_instance_private (native);
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CoglContext *ctx = clutter_backend_get_cogl_context (clutter_get_default_backend ());
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MetaMonitorManager *monitors;
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monitors = meta_monitor_manager_get ();
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g_signal_connect_object (monitors, "monitors-changed",
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G_CALLBACK (on_monitors_changed), native, 0);
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#if defined(CLUTTER_WINDOWING_EGL)
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if (clutter_check_windowing_backend (CLUTTER_WINDOWING_EGL))
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{
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CoglRenderer *cogl_renderer = cogl_display_get_renderer (cogl_context_get_display (ctx));
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priv->drm_fd = cogl_kms_renderer_get_kms_fd (cogl_renderer);
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priv->gbm = gbm_create_device (priv->drm_fd);
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}
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#endif
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}
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struct gbm_device *
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meta_cursor_renderer_native_get_gbm_device (MetaCursorRendererNative *native)
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{
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MetaCursorRendererNativePrivate *priv = meta_cursor_renderer_native_get_instance_private (native);
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return priv->gbm;
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}
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void
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meta_cursor_renderer_native_force_update (MetaCursorRendererNative *native)
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{
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update_hw_cursor (native, TRUE);
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}
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