/*
 * File      : dc_hw.c
 * This file is part of RT-Thread RTOS
 * COPYRIGHT (C) 2006 - 2009, RT-Thread Development Team
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://www.rt-thread.org/license/LICENSE
 *
 * Change Logs:
 * Date           Author       Notes
 * 2009-10-16     Bernard      first version
 */
#include <rtgui/dc.h>
#include <rtgui/dc_hw.h>
#include <rtgui/driver.h>
#include <rtgui/rtgui_system.h>
#include <rtgui/rtgui_app.h>
#include <rtgui/rtgui_server.h>

#include <rtgui/widgets/container.h>
#include <rtgui/widgets/window.h>
#include <rtgui/widgets/title.h>

#define _int_swap(x, y)         do {x ^= y; y ^= x; x ^= y;} while (0)

static void rtgui_dc_hw_draw_point(struct rtgui_dc *dc, int x, int y);
static void rtgui_dc_hw_draw_color_point(struct rtgui_dc *dc, int x, int y, rtgui_color_t color);
static void rtgui_dc_hw_draw_hline(struct rtgui_dc *dc, int x1, int x2, int y);
static void rtgui_dc_hw_draw_vline(struct rtgui_dc *dc, int x, int y1, int y2);
static void rtgui_dc_hw_fill_rect(struct rtgui_dc *dc, rtgui_rect_t *rect);
static void rtgui_dc_hw_blit_line(struct rtgui_dc *self, int x1, int x2, int y, rt_uint8_t *line_data);
static void rtgui_dc_hw_blit(struct rtgui_dc *dc, struct rtgui_point *dc_point, struct rtgui_dc *dest, rtgui_rect_t *rect);
static void rtgui_dc_hw_set_gc(struct rtgui_dc *dc, rtgui_gc_t *gc);
static rtgui_gc_t *rtgui_dc_hw_get_gc(struct rtgui_dc *dc);
static rt_bool_t rtgui_dc_hw_fini(struct rtgui_dc *dc);
static rt_bool_t rtgui_dc_hw_get_visible(struct rtgui_dc *dc);
static void rtgui_dc_hw_get_rect(struct rtgui_dc *dc, rtgui_rect_t *rect);

const struct rtgui_dc_engine dc_hw_engine =
{
    rtgui_dc_hw_draw_point,
    rtgui_dc_hw_draw_color_point,
    rtgui_dc_hw_draw_vline,
    rtgui_dc_hw_draw_hline,
    rtgui_dc_hw_fill_rect,
    rtgui_dc_hw_blit_line,
    rtgui_dc_hw_blit,

    rtgui_dc_hw_set_gc,
    rtgui_dc_hw_get_gc,

    rtgui_dc_hw_get_visible,
    rtgui_dc_hw_get_rect,

    rtgui_dc_hw_fini,
};

extern struct rt_mutex cursor_mutex;
extern void rtgui_mouse_show_cursor(void);
extern void rtgui_mouse_hide_cursor(void);
struct rtgui_dc *rtgui_dc_hw_create(rtgui_widget_t *owner)
{
    struct rtgui_dc_hw *dc;
    rtgui_widget_t *widget;

    /* adjudge owner */
    if (owner == RT_NULL || owner->toplevel == RT_NULL) return RT_NULL;
    if (!RTGUI_IS_WIN(owner->toplevel)) return RT_NULL;

    /* set init visible as true */
    RTGUI_WIDGET_DC_SET_VISIBLE(owner);

    /* check widget visible */
    widget = owner;
    while (widget != RT_NULL)
    {
        if (RTGUI_WIDGET_IS_HIDE(widget))
        {
            RTGUI_WIDGET_DC_SET_UNVISIBLE(owner);
            return RT_NULL;
        }

        widget = widget->parent;
    }

    if (!RTGUI_WIDGET_IS_DC_VISIBLE(owner)) return RT_NULL;

    /* create DC */
    dc = (struct rtgui_dc_hw *) rtgui_malloc(sizeof(struct rtgui_dc_hw));
    dc->parent.type = RTGUI_DC_HW;
    dc->parent.engine = &dc_hw_engine;
    dc->owner = owner;
    dc->hw_driver = rtgui_graphic_driver_get_default();

    if (RTGUI_IS_WINTITLE(owner->toplevel))
    {
        struct rtgui_win *top = RTGUI_WIN(owner->toplevel);
        top->drawing ++;

        if (top->drawing == 1)
        {
#ifdef RTGUI_USING_MOUSE_CURSOR
#ifdef _WIN32_NATIVE
            rt_mutex_take(&cursor_mutex, RT_WAITING_FOREVER);
            rt_kprintf("hide cursor\n");
            rtgui_mouse_hide_cursor();
#else
            /* hide cursor */
            rtgui_mouse_hide_cursor();
#endif
#endif
        }
    }
    else if (RTGUI_IS_APP(owner->toplevel) ||
             RTGUI_IS_WIN(owner->toplevel))
    {
        struct rtgui_win *top = RTGUI_WIN(owner->toplevel);
        top->drawing ++;

        if (top->drawing == 1)
        {
#ifdef _WIN32_NATIVE
#ifdef RTGUI_USING_MOUSE_CURSOR
            rt_mutex_take(&cursor_mutex, RT_WAITING_FOREVER);
            rt_kprintf("hide cursor\n");
            rtgui_mouse_hide_cursor();
#endif
#else
            /* send draw begin to server */
            struct rtgui_event_update_begin eupdate;
            RTGUI_EVENT_UPDATE_BEGIN_INIT(&(eupdate));
            eupdate.rect = RTGUI_WIDGET(top)->extent;

            rtgui_server_post_event((struct rtgui_event *)&eupdate, sizeof(eupdate));
#endif
        }
    }

    return &(dc->parent);
}

static rt_bool_t rtgui_dc_hw_fini(struct rtgui_dc *dc)
{
    rtgui_widget_t *owner;
    struct rtgui_dc_hw *self;

    if (dc == RT_NULL || dc->type != RTGUI_DC_HW) return RT_FALSE;

    self = (struct rtgui_dc_hw *)dc;
    /* get owner */
    owner = self->owner;

    if (RTGUI_IS_WINTITLE(owner->toplevel))
    {
        /* update title extent */
        struct rtgui_win *top = RTGUI_WIN(owner->toplevel);

        top->drawing --;
        if ((top->drawing == 0) && RTGUI_WIDGET_IS_DC_VISIBLE(owner))
        {
#ifdef _WIN32_NATIVE
#ifdef RTGUI_USING_MOUSE_CURSOR
            rt_mutex_release(&cursor_mutex);
            /* show cursor */
            rtgui_mouse_show_cursor();
            rt_kprintf("show cursor\n");
#endif
            /* update screen */
            rtgui_graphic_driver_screen_update(self->hw_driver, &(owner->extent));
#else
#ifdef RTGUI_USING_MOUSE_CURSOR
            /* show cursor */
            rtgui_mouse_show_cursor();
#endif

            /* update screen */
            rtgui_graphic_driver_screen_update(self->hw_driver, &(owner->extent));
#endif
        }
    }
    else if (RTGUI_IS_APP(owner->toplevel) ||
             RTGUI_IS_WIN(owner->toplevel))
    {
        struct rtgui_win *top = RTGUI_WIN(owner->toplevel);
        top->drawing --;

        if ((top->drawing == 0) && RTGUI_WIDGET_IS_DC_VISIBLE(owner))
        {
#ifdef _WIN32_NATIVE
#ifdef RTGUI_USING_MOUSE_CURSOR
            rt_mutex_release(&cursor_mutex);
            /* show cursor */
            rtgui_mouse_show_cursor();
            rt_kprintf("show cursor\n");
#endif
            /* update screen */
            rtgui_graphic_driver_screen_update(self->hw_driver, &(owner->extent));
#else
            /* send to server to end drawing */
            struct rtgui_event_update_end eupdate;
            RTGUI_EVENT_UPDATE_END_INIT(&(eupdate));
            eupdate.rect = owner->extent;

            rtgui_server_post_event((struct rtgui_event *)&eupdate, sizeof(eupdate));
#endif
        }
    }

    /* release hardware dc */
    rtgui_free(self);

    return RT_TRUE;
}

/*
 * draw a logic point on device
 */
static void rtgui_dc_hw_draw_point(struct rtgui_dc *self, int x, int y)
{
    struct rtgui_dc_hw *dc;

    RT_ASSERT(self != RT_NULL);
    dc = (struct rtgui_dc_hw *) self;

    x = x + dc->owner->extent.x1;
    y = y + dc->owner->extent.y1;

    /* draw this point */
    dc->hw_driver->ops->set_pixel(&(dc->owner->gc.foreground), x, y);
}

static void rtgui_dc_hw_draw_color_point(struct rtgui_dc *self, int x, int y, rtgui_color_t color)
{
    struct rtgui_dc_hw *dc;

    RT_ASSERT(self != RT_NULL);
    dc = (struct rtgui_dc_hw *) self;

    x = x + dc->owner->extent.x1;
    y = y + dc->owner->extent.y1;

    /* draw this point */
    dc->hw_driver->ops->set_pixel(&color, x, y);
}

/*
 * draw a logic vertical line on device
 */
static void rtgui_dc_hw_draw_vline(struct rtgui_dc *self, int x, int y1, int y2)
{
    struct rtgui_dc_hw *dc;

    RT_ASSERT(self != RT_NULL);
    dc = (struct rtgui_dc_hw *) self;

    x = x + dc->owner->extent.x1;
    y1 = y1 + dc->owner->extent.y1;
    y2 = y2 + dc->owner->extent.y1;
    if (y1 > y2) _int_swap(y1, y2);

    /* draw vline */
    dc->hw_driver->ops->draw_vline(&(dc->owner->gc.foreground), x, y1, y2);
}

/*
 * draw a logic horizontal line on device
 */
static void rtgui_dc_hw_draw_hline(struct rtgui_dc *self, int x1, int x2, int y)
{
    struct rtgui_dc_hw *dc;

    RT_ASSERT(self != RT_NULL);
    dc = (struct rtgui_dc_hw *) self;

    /* convert logic to device */
    x1 = x1 + dc->owner->extent.x1;
    x2 = x2 + dc->owner->extent.x1;
    if (x1 > x2) _int_swap(x1, x2);
    y  = y + dc->owner->extent.y1;

    /* draw hline */
    dc->hw_driver->ops->draw_hline(&(dc->owner->gc.foreground), x1, x2, y);
}

static void rtgui_dc_hw_fill_rect(struct rtgui_dc *self, struct rtgui_rect *rect)
{
    rtgui_color_t color;
    register rt_base_t index, x1, x2;
    struct rtgui_dc_hw *dc;

    RT_ASSERT(self != RT_NULL);
    dc = (struct rtgui_dc_hw *) self;

    /* get background color */
    color = dc->owner->gc.background;
    /* convert logic to device */
    x1 = rect->x1 + dc->owner->extent.x1;
    x2 = rect->x2 + dc->owner->extent.x1;

    /* fill rect */
    for (index = dc->owner->extent.y1 + rect->y1; index < dc->owner->extent.y1 + rect->y2; index ++)
    {
        dc->hw_driver->ops->draw_hline(&color, x1, x2, index);
    }
}

static void rtgui_dc_hw_blit_line(struct rtgui_dc *self, int x1, int x2, int y, rt_uint8_t *line_data)
{
    struct rtgui_dc_hw *dc;

    RT_ASSERT(self != RT_NULL);
    dc = (struct rtgui_dc_hw *) self;

    /* convert logic to device */
    x1 = x1 + dc->owner->extent.x1;
    x2 = x2 + dc->owner->extent.x1;
    if (x1 > x2) _int_swap(x1, x2);
    y  = y + dc->owner->extent.y1;

    dc->hw_driver->ops->draw_raw_hline(line_data, x1, x2, y);
}

static void rtgui_dc_hw_blit(struct rtgui_dc *dc, struct rtgui_point *dc_point, struct rtgui_dc *dest, rtgui_rect_t *rect)
{
    /* not blit in hardware dc */
    return ;
}

static void rtgui_dc_hw_set_gc(struct rtgui_dc *self, rtgui_gc_t *gc)
{
    struct rtgui_dc_hw *dc;

    RT_ASSERT(self != RT_NULL);
    dc = (struct rtgui_dc_hw *) self;

    /* set gc */
    dc->owner->gc = *gc;
}

static rtgui_gc_t *rtgui_dc_hw_get_gc(struct rtgui_dc *self)
{
    struct rtgui_dc_hw *dc;

    RT_ASSERT(self != RT_NULL);
    dc = (struct rtgui_dc_hw *) self;

    return &(dc->owner->gc);
}

static rt_bool_t rtgui_dc_hw_get_visible(struct rtgui_dc *self)
{
    struct rtgui_dc_hw *dc;

    RT_ASSERT(self != RT_NULL);
    dc = (struct rtgui_dc_hw *) self;

    if (!RTGUI_WIDGET_IS_DC_VISIBLE(dc->owner)) return RT_FALSE;

    return RT_TRUE;
}

static void rtgui_dc_hw_get_rect(struct rtgui_dc *self, rtgui_rect_t *rect)
{
    struct rtgui_dc_hw *dc;

    RT_ASSERT(self != RT_NULL);
    dc = (struct rtgui_dc_hw *) self;

    /* get owner */
    rtgui_widget_get_rect(dc->owner, rect);
}
