1389 lines
35 KiB
C
1389 lines
35 KiB
C
/*
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* File : dc.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006 - 2009, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2009-10-16 Bernard first version
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* 2010-09-20 richard modified rtgui_dc_draw_round_rect
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* 2010-09-27 Bernard fix draw_mono_bmp issue
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* 2011-04-25 Bernard fix fill polygon issue, which found by loveic
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*/
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#include <rtgui/dc.h>
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#include <rtgui/rtgui_system.h>
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#include <string.h> /* for strlen */
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#include <stdlib.h> /* fir qsort */
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/* for sin/cos etc */
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#include <math.h>
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#ifndef M_PI
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#define M_PI 3.14159265358979323846
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#endif
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static int _int_compare(const void *a, const void *b)
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{
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return (*(const int *) a) - (*(const int *) b);
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}
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void rtgui_dc_destory(struct rtgui_dc *dc)
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{
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if (dc == RT_NULL) return;
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dc->engine->fini(dc);
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rtgui_free(dc);
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}
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RTM_EXPORT(rtgui_dc_destory);
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void rtgui_dc_draw_line(struct rtgui_dc *dc, int x1, int y1, int x2, int y2)
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{
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if (dc == RT_NULL) return;
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if (y1 == y2)
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{
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rtgui_dc_draw_hline(dc, x1, x2, y1);
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}
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else if (x1 == x2)
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{
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rtgui_dc_draw_vline(dc, x1, y1, y2);
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}
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else
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{
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int dx, dy, sdx, sdy, dxabs, dyabs, x, y, px, py;
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register rt_base_t i;
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/* rtgui_rect_t rect; */
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dx = x2 - x1; /* the horizontal distance of the line */
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dy = y2 - y1; /* the vertical distance of the line */
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#define rtgui_sgn(x) ((x<0)?-1:((x>0)?1:0)) /* macro to return the sign of a number */
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#define rtgui_abs(x) ((x)>=0? (x):-(x)) /* macro to return the absolute value */
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dxabs = rtgui_abs(dx);
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dyabs = rtgui_abs(dy);
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sdx = rtgui_sgn(dx);
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sdy = rtgui_sgn(dy);
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x = dyabs >> 1;
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y = dxabs >> 1;
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px = x1;
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py = y1;
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if (dxabs >= dyabs) /* the line is more horizontal than vertical */
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{
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for (i = 0; i < dxabs; i++)
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{
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y += dyabs;
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if (y >= dxabs)
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{
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y -= dxabs;
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py += sdy;
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}
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px += sdx;
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/* draw this point */
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rtgui_dc_draw_point(dc, px, py);
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}
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}
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else /* the line is more vertical than horizontal */
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{
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for (i = 0; i < dyabs; i++)
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{
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x += dxabs;
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if (x >= dyabs)
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{
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x -= dyabs;
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px += sdx;
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}
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py += sdy;
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/* draw this point */
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rtgui_dc_draw_point(dc, px, py);
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}
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}
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}
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}
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RTM_EXPORT(rtgui_dc_draw_line);
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void rtgui_dc_draw_horizontal_line(struct rtgui_dc *dc, int x1, int x2, int y)
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{
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rtgui_color_t color;
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if (dc == RT_NULL) return ;
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/* save old color */
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color = RTGUI_DC_FC(dc);
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RTGUI_DC_FC(dc) = dark_grey;
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rtgui_dc_draw_hline(dc, x1, x2, y);
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y ++;
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RTGUI_DC_FC(dc) = high_light;
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rtgui_dc_draw_hline(dc, x1, x2, y);
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/* restore color */
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RTGUI_DC_FC(dc) = color;
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}
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RTM_EXPORT(rtgui_dc_draw_horizontal_line);
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void rtgui_dc_draw_vertical_line(struct rtgui_dc *dc, int x, int y1, int y2)
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{
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rtgui_color_t color;
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if (dc == RT_NULL) return ;
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/* save old color */
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color = RTGUI_DC_FC(dc);
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RTGUI_DC_FC(dc) = dark_grey;
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rtgui_dc_draw_vline(dc, x, y1, y2);
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x ++;
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RTGUI_DC_FC(dc) = high_light;
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rtgui_dc_draw_vline(dc, x, y1, y2);
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/* restore color */
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RTGUI_DC_FC(dc) = color;
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}
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RTM_EXPORT(rtgui_dc_draw_vertical_line);
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void rtgui_dc_draw_rect(struct rtgui_dc *dc, struct rtgui_rect *rect)
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{
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rtgui_dc_draw_hline(dc, rect->x1, rect->x2, rect->y1);
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rtgui_dc_draw_hline(dc, rect->x1, rect->x2, rect->y2 - 1);
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rtgui_dc_draw_vline(dc, rect->x1, rect->y1, rect->y2);
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rtgui_dc_draw_vline(dc, rect->x2 - 1, rect->y1, rect->y2);
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}
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RTM_EXPORT(rtgui_dc_draw_rect);
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void rtgui_dc_fill_rect_forecolor(struct rtgui_dc *dc, struct rtgui_rect *rect)
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{
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int i = 0;
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rtgui_dc_draw_rect(dc, rect);
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do
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{
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rtgui_dc_draw_hline(dc, rect->x1 + 1, rect->x2 - 1, rect->y1 + i);
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i++;
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}
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while (!(rect->y1 + i == rect->y2));
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}
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RTM_EXPORT(rtgui_dc_fill_rect_forecolor);
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void rtgui_dc_draw_round_rect(struct rtgui_dc *dc, struct rtgui_rect *rect, int r)
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{
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RT_ASSERT(((rect->x2 - rect->x1) / 2 >= r) && ((rect->y2 - rect->y1) / 2 >= r));
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if (r < 0)
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{
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return;
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}
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if (r == 0)
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{
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rtgui_dc_draw_rect(dc, rect);
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return;
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}
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if (((rect->x2 - rect->x1) / 2 >= r) && ((rect->y2 - rect->y1) / 2 >= r))
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{
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rtgui_dc_draw_arc(dc, rect->x1 + r, rect->y1 + r, r, 180, 270);
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rtgui_dc_draw_arc(dc, rect->x2 - r, rect->y1 + r, r, 270, 360);
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rtgui_dc_draw_arc(dc, rect->x1 + r, rect->y2 - r, r, 90, 180);
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rtgui_dc_draw_arc(dc, rect->x2 - r, rect->y2 - r, r, 0, 90);
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rtgui_dc_draw_hline(dc, rect->x1 + r, rect->x2 - r, rect->y1);
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rtgui_dc_draw_hline(dc, rect->x1 + r, rect->x2 - r, rect->y2);
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rtgui_dc_draw_vline(dc, rect->x1, rect->y1 + r, rect->y2 - r);
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rtgui_dc_draw_vline(dc, rect->x2, rect->y1 + r, rect->y2 - r);
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}
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}
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RTM_EXPORT(rtgui_dc_draw_round_rect);
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void rtgui_dc_fill_round_rect(struct rtgui_dc *dc, struct rtgui_rect *rect, int r)
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{
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struct rtgui_rect rect_temp;
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RT_ASSERT(((rect->x2 - rect->x1) / 2 >= r) && ((rect->y2 - rect->y1) / 2 >= r));
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if (((rect->x2 - rect->x1) / 2 >= r) && ((rect->y2 - rect->y1) / 2 >= r))
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{
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rect_temp.x1 = rect->x1 + r;
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rect_temp.y1 = rect->y1;
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rect_temp.x2 = rect->x2 - r;
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rect_temp.y2 = rect->y2;
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rtgui_dc_fill_rect_forecolor(dc, &rect_temp);//fill rect with foreground
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rect_temp.x1 = rect->x1;
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rect_temp.y1 = rect->y1 + r;
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rect_temp.x2 = rect->x1 + r;
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rect_temp.y2 = rect->y2 - r;
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rtgui_dc_fill_rect_forecolor(dc, &rect_temp);//fill rect with foreground
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rect_temp.x1 = rect->x2 - r;
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rect_temp.y1 = rect->y1 + r;
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rect_temp.x2 = rect->x2;
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rect_temp.y2 = rect->y2 - r;
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rtgui_dc_fill_rect_forecolor(dc, &rect_temp);//fill rect with foreground
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rtgui_dc_fill_circle(dc, rect->x1 + r, rect->y1 + r, r);
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rtgui_dc_fill_circle(dc, rect->x2 - r, rect->y2 - r, r);
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rtgui_dc_fill_circle(dc, rect->x2 - r, rect->y1 + r, r);
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rtgui_dc_fill_circle(dc, rect->x1 + r, rect->y2 - r, r);
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}
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}
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RTM_EXPORT(rtgui_dc_fill_round_rect);
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void rtgui_dc_draw_shaded_rect(struct rtgui_dc *dc, rtgui_rect_t *rect,
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rtgui_color_t c1, rtgui_color_t c2)
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{
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RT_ASSERT(dc != RT_NULL);
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RTGUI_DC_FC(dc) = c1;
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rtgui_dc_draw_vline(dc, rect->x1, rect->y1, rect->y2);
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rtgui_dc_draw_hline(dc, rect->x1 + 1, rect->x2, rect->y1);
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RTGUI_DC_FC(dc) = c2;
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rtgui_dc_draw_vline(dc, rect->x2 - 1, rect->y1, rect->y2);
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rtgui_dc_draw_hline(dc, rect->x1, rect->x2, rect->y2 - 1);
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}
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RTM_EXPORT(rtgui_dc_draw_shaded_rect);
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void rtgui_dc_draw_focus_rect(struct rtgui_dc *dc, rtgui_rect_t *rect)
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{
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int x, y;
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for (x = rect->x1; x < rect->x2 - 1; x++)
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{
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if ((x + rect->y1) & 0x01)
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rtgui_dc_draw_point(dc, x, rect->y1);
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if ((x + rect->y2 - 1) & 0x01)
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rtgui_dc_draw_point(dc, x, rect->y2 - 1);
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}
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for (y = rect->y1; y < rect->y2; y++)
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{
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if ((rect->x1 + y) & 0x01)
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rtgui_dc_draw_point(dc, rect->x1, y);
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if ((rect->x2 - 1 + y) & 0x01)
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rtgui_dc_draw_point(dc, rect->x2 - 1, y);
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}
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}
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RTM_EXPORT(rtgui_dc_draw_focus_rect);
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void rtgui_dc_draw_text(struct rtgui_dc *dc, const char *text, struct rtgui_rect *rect)
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{
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rt_uint32_t len;
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struct rtgui_font *font;
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struct rtgui_rect text_rect;
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RT_ASSERT(dc != RT_NULL);
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font = RTGUI_DC_FONT(dc);
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if (font == RT_NULL)
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{
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/* use system default font */
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font = rtgui_font_default();
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}
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/* text align */
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rtgui_font_get_metrics(font, text, &text_rect);
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rtgui_rect_moveto_align(rect, &text_rect, RTGUI_DC_TEXTALIGN(dc));
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len = strlen((const char *)text);
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rtgui_font_draw(font, dc, text, len, &text_rect);
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}
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RTM_EXPORT(rtgui_dc_draw_text);
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void rtgui_dc_draw_text_stroke(struct rtgui_dc *dc, const char *text, struct rtgui_rect *rect,
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rtgui_color_t color_stroke, rtgui_color_t color_core)
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{
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int x, y;
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rtgui_rect_t r;
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rtgui_color_t fc;
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RT_ASSERT(dc != RT_NULL);
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fc = RTGUI_DC_FC(dc);
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RTGUI_DC_FC(dc) = color_stroke;
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for (x = -1; x < 2; x++)
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{
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for (y = -1; y < 2; y++)
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{
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r = *rect;
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rtgui_rect_moveto(&r, x, y);
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rtgui_dc_draw_text(dc, text, &r);
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}
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}
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RTGUI_DC_FC(dc) = color_core;
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rtgui_dc_draw_text(dc, text, rect);
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RTGUI_DC_FC(dc) = fc;
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}
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RTM_EXPORT(rtgui_dc_draw_text_stroke);
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/*
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* draw a monochrome color bitmap data
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*/
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void rtgui_dc_draw_mono_bmp(struct rtgui_dc *dc, int x, int y, int w, int h, const rt_uint8_t *data)
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{
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int i, j, k;
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/* get word bytes */
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w = (w + 7) / 8;
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/* draw mono bitmap data */
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for (i = 0; i < h; i ++)
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for (j = 0; j < w; j++)
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for (k = 0; k < 8; k++)
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if (((data[i * w + j] >> (7 - k)) & 0x01) != 0)
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rtgui_dc_draw_point(dc, x + 8 * j + k, y + i);
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}
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RTM_EXPORT(rtgui_dc_draw_mono_bmp);
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void rtgui_dc_draw_byte(struct rtgui_dc *dc, int x, int y, int h, const rt_uint8_t *data)
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{
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rtgui_dc_draw_mono_bmp(dc, x, y, 8, h, data);
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}
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RTM_EXPORT(rtgui_dc_draw_byte);
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void rtgui_dc_draw_word(struct rtgui_dc *dc, int x, int y, int h, const rt_uint8_t *data)
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{
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rtgui_dc_draw_mono_bmp(dc, x, y, 16, h, data);
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}
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RTM_EXPORT(rtgui_dc_draw_word);
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void rtgui_dc_draw_border(struct rtgui_dc *dc, rtgui_rect_t *rect, int flag)
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{
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rtgui_rect_t r;
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rtgui_color_t color;
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if (dc == RT_NULL) return ;
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/* save old color */
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color = RTGUI_DC_FC(dc);
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r = *rect;
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switch (flag)
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{
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case RTGUI_BORDER_RAISE:
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rtgui_dc_draw_shaded_rect(dc, &r, high_light, black);
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rtgui_rect_inflate(&r, -1);
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rtgui_dc_draw_shaded_rect(dc, &r, light_grey, dark_grey);
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break;
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case RTGUI_BORDER_SUNKEN:
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rtgui_dc_draw_shaded_rect(dc, &r, dark_grey, high_light);
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rtgui_rect_inflate(&r, -1);
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rtgui_dc_draw_shaded_rect(dc, &r, black, light_grey);
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break;
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case RTGUI_BORDER_BOX:
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rtgui_dc_draw_shaded_rect(dc, &r, dark_grey, high_light);
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rtgui_rect_inflate(&r, -1);
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rtgui_dc_draw_shaded_rect(dc, &r, high_light, dark_grey);
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break;
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case RTGUI_BORDER_STATIC:
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rtgui_dc_draw_shaded_rect(dc, &r, dark_grey, high_light);
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break;
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case RTGUI_BORDER_EXTRA:
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RTGUI_DC_FC(dc) = light_grey;
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rtgui_dc_draw_rect(dc, &r);
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break;
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case RTGUI_BORDER_SIMPLE:
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RTGUI_DC_FC(dc) = black;
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rtgui_dc_draw_rect(dc, &r);
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break;
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default:
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break;
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}
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/* restore color */
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RTGUI_DC_FC(dc) = color;
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}
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RTM_EXPORT(rtgui_dc_draw_border);
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void rtgui_dc_draw_polygon(struct rtgui_dc *dc, const int *vx, const int *vy, int count)
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{
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int i;
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const int *x1, *y1, *x2, *y2;
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/*
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* Sanity check
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*/
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if (count < 3) return;
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/*
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* Pointer setup
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*/
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x1 = x2 = vx;
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y1 = y2 = vy;
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x2++;
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y2++;
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/*
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* Draw
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*/
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for (i = 1; i < count; i++)
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{
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rtgui_dc_draw_line(dc, *x1, *y1, *x2, *y2);
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x1 = x2;
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y1 = y2;
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x2++;
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y2++;
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}
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rtgui_dc_draw_line(dc, *x1, *y1, *vx, *vy);
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}
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RTM_EXPORT(rtgui_dc_draw_polygon);
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void rtgui_dc_draw_regular_polygon(struct rtgui_dc *dc, int x, int y, int r, int count, rt_uint16_t angle)
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{
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int i, temp_val;
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double temp;
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float angle_interval;
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int *xx;
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int *x_head;
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int *yy;
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int *y_head;
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/*
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* Sanity check
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*/
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if (count < 3) return;
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angle_interval = 360.0 / count;
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/*
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* Pointer setup
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*/
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x_head = xx = (int *)rtgui_malloc(sizeof(int) * count);
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y_head = yy = (int *)rtgui_malloc(sizeof(int) * count);
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for (i = 0; i < count; i++)
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{
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temp = cos(((angle_interval * i) + angle) * M_PI / 180);
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temp *= r;
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temp_val = (int)temp;
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*xx = temp_val + x;
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temp = sin(((angle_interval * i) + angle) * M_PI / 180);
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temp *= r;
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temp_val = (int)temp;
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*yy = temp_val + y;
|
|
|
|
xx++;
|
|
yy++;
|
|
}
|
|
|
|
rtgui_dc_draw_polygon(dc, (const int *)x_head, (const int *)y_head, count);
|
|
|
|
rtgui_free(x_head);
|
|
rtgui_free(y_head);
|
|
|
|
}
|
|
RTM_EXPORT(rtgui_dc_draw_regular_polygon);
|
|
|
|
void rtgui_dc_fill_polygon(struct rtgui_dc *dc, const int *vx, const int *vy, int count)
|
|
{
|
|
int i;
|
|
int y, xa, xb;
|
|
int miny, maxy;
|
|
int x1, y1;
|
|
int x2, y2;
|
|
int ind1, ind2;
|
|
int ints;
|
|
int *poly_ints = RT_NULL;
|
|
|
|
/*
|
|
* Sanity check number of edges
|
|
*/
|
|
if (count < 3) return;
|
|
|
|
/*
|
|
* Allocate temp array, only grow array
|
|
*/
|
|
poly_ints = (int *) rtgui_malloc(sizeof(int) * count);
|
|
if (poly_ints == RT_NULL) return ; /* no memory, failed */
|
|
|
|
/*
|
|
* Determine Y maximal
|
|
*/
|
|
miny = vy[0];
|
|
maxy = vy[0];
|
|
for (i = 1; (i < count); i++)
|
|
{
|
|
if (vy[i] < miny) miny = vy[i];
|
|
else if (vy[i] > maxy) maxy = vy[i];
|
|
}
|
|
|
|
/*
|
|
* Draw, scanning y
|
|
*/
|
|
for (y = miny; (y <= maxy); y++)
|
|
{
|
|
ints = 0;
|
|
for (i = 0; (i < count); i++)
|
|
{
|
|
if (!i)
|
|
{
|
|
ind1 = count - 1;
|
|
ind2 = 0;
|
|
}
|
|
else
|
|
{
|
|
ind1 = i - 1;
|
|
ind2 = i;
|
|
}
|
|
y1 = vy[ind1];
|
|
y2 = vy[ind2];
|
|
if (y1 < y2)
|
|
{
|
|
x1 = vx[ind1];
|
|
x2 = vx[ind2];
|
|
}
|
|
else if (y1 > y2)
|
|
{
|
|
y2 = vy[ind1];
|
|
y1 = vy[ind2];
|
|
x2 = vx[ind1];
|
|
x1 = vx[ind2];
|
|
}
|
|
else
|
|
{
|
|
continue;
|
|
}
|
|
|
|
if (((y >= y1) && (y < y2)) || ((y == maxy) && (y > y1) && (y <= y2)))
|
|
{
|
|
poly_ints[ints++] = ((65536 * (y - y1)) / (y2 - y1)) * (x2 - x1) + (65536 * x1);
|
|
}
|
|
}
|
|
|
|
qsort(poly_ints, ints, sizeof(int), _int_compare);
|
|
|
|
for (i = 0; (i < ints); i += 2)
|
|
{
|
|
xa = poly_ints[i] + 1;
|
|
xa = (xa >> 16) + ((xa & 32768) >> 15);
|
|
xb = poly_ints[i + 1] - 1;
|
|
xb = (xb >> 16) + ((xb & 32768) >> 15);
|
|
rtgui_dc_draw_hline(dc, xa, xb, y);
|
|
}
|
|
}
|
|
|
|
/* release memory */
|
|
rtgui_free(poly_ints);
|
|
}
|
|
RTM_EXPORT(rtgui_dc_fill_polygon);
|
|
|
|
void rtgui_dc_draw_circle(struct rtgui_dc *dc, int x, int y, int r)
|
|
{
|
|
rt_int16_t cx = 0;
|
|
rt_int16_t cy = r;
|
|
rt_int16_t df = 1 - r;
|
|
rt_int16_t d_e = 3;
|
|
rt_int16_t d_se = -2 * r + 5;
|
|
rt_int16_t xpcx, xmcx, xpcy, xmcy;
|
|
rt_int16_t ypcy, ymcy, ypcx, ymcx;
|
|
|
|
/*
|
|
* sanity check radius
|
|
*/
|
|
if (r < 0) return ;
|
|
|
|
/* special case for r=0 - draw a point */
|
|
if (r == 0) rtgui_dc_draw_point(dc, x, y);
|
|
|
|
/*
|
|
* draw circle
|
|
*/
|
|
do
|
|
{
|
|
ypcy = y + cy;
|
|
ymcy = y - cy;
|
|
if (cx > 0)
|
|
{
|
|
xpcx = x + cx;
|
|
xmcx = x - cx;
|
|
rtgui_dc_draw_point(dc, xmcx, ypcy);
|
|
rtgui_dc_draw_point(dc, xpcx, ypcy);
|
|
rtgui_dc_draw_point(dc, xmcx, ymcy);
|
|
rtgui_dc_draw_point(dc, xpcx, ymcy);
|
|
}
|
|
else
|
|
{
|
|
rtgui_dc_draw_point(dc, x, ymcy);
|
|
rtgui_dc_draw_point(dc, x, ypcy);
|
|
}
|
|
xpcy = x + cy;
|
|
xmcy = x - cy;
|
|
if ((cx > 0) && (cx != cy))
|
|
{
|
|
ypcx = y + cx;
|
|
ymcx = y - cx;
|
|
rtgui_dc_draw_point(dc, xmcy, ypcx);
|
|
rtgui_dc_draw_point(dc, xpcy, ypcx);
|
|
rtgui_dc_draw_point(dc, xmcy, ymcx);
|
|
rtgui_dc_draw_point(dc, xpcy, ymcx);
|
|
}
|
|
else if (cx == 0)
|
|
{
|
|
rtgui_dc_draw_point(dc, xmcy, y);
|
|
rtgui_dc_draw_point(dc, xpcy, y);
|
|
}
|
|
|
|
/*
|
|
* Update
|
|
*/
|
|
if (df < 0)
|
|
{
|
|
df += d_e;
|
|
d_e += 2;
|
|
d_se += 2;
|
|
}
|
|
else
|
|
{
|
|
df += d_se;
|
|
d_e += 2;
|
|
d_se += 4;
|
|
cy--;
|
|
}
|
|
cx++;
|
|
}
|
|
while (cx <= cy);
|
|
}
|
|
RTM_EXPORT(rtgui_dc_draw_circle);
|
|
|
|
void rtgui_dc_fill_circle(struct rtgui_dc *dc, rt_int16_t x, rt_int16_t y, rt_int16_t r)
|
|
{
|
|
rt_int16_t cx = 0;
|
|
rt_int16_t cy = r;
|
|
rt_int16_t ocx = (rt_int16_t) 0xffff;
|
|
rt_int16_t ocy = (rt_int16_t) 0xffff;
|
|
rt_int16_t df = 1 - r;
|
|
rt_int16_t d_e = 3;
|
|
rt_int16_t d_se = -2 * r + 5;
|
|
rt_int16_t xpcx, xmcx, xpcy, xmcy;
|
|
rt_int16_t ypcy, ymcy, ypcx, ymcx;
|
|
|
|
/*
|
|
* Sanity check radius
|
|
*/
|
|
if (r < 0) return;
|
|
|
|
/*
|
|
* Special case for r=0 - draw a point
|
|
*/
|
|
if (r == 0)
|
|
{
|
|
rtgui_dc_draw_point(dc, x, y);
|
|
return ;
|
|
}
|
|
|
|
/*
|
|
* Draw
|
|
*/
|
|
do
|
|
{
|
|
xpcx = x + cx;
|
|
xmcx = x - cx;
|
|
xpcy = x + cy;
|
|
xmcy = x - cy;
|
|
if (ocy != cy)
|
|
{
|
|
if (cy > 0)
|
|
{
|
|
ypcy = y + cy;
|
|
ymcy = y - cy;
|
|
rtgui_dc_draw_hline(dc, xmcx, xpcx, ypcy);
|
|
rtgui_dc_draw_hline(dc, xmcx, xpcx, ymcy);
|
|
}
|
|
else
|
|
{
|
|
rtgui_dc_draw_hline(dc, xmcx, xpcx, y);
|
|
}
|
|
ocy = cy;
|
|
}
|
|
if (ocx != cx)
|
|
{
|
|
if (cx != cy)
|
|
{
|
|
if (cx > 0)
|
|
{
|
|
ypcx = y + cx;
|
|
ymcx = y - cx;
|
|
rtgui_dc_draw_hline(dc, xmcy, xpcy, ymcx);
|
|
rtgui_dc_draw_hline(dc, xmcy, xpcy, ypcx);
|
|
}
|
|
else
|
|
{
|
|
rtgui_dc_draw_hline(dc, xmcy, xpcy, y);
|
|
}
|
|
}
|
|
ocx = cx;
|
|
}
|
|
/*
|
|
* Update
|
|
*/
|
|
if (df < 0)
|
|
{
|
|
df += d_e;
|
|
d_e += 2;
|
|
d_se += 2;
|
|
}
|
|
else
|
|
{
|
|
df += d_se;
|
|
d_e += 2;
|
|
d_se += 4;
|
|
cy--;
|
|
}
|
|
cx++;
|
|
}
|
|
while (cx <= cy);
|
|
}
|
|
RTM_EXPORT(rtgui_dc_fill_circle);
|
|
|
|
void rtgui_dc_draw_arc(struct rtgui_dc *dc, rt_int16_t x, rt_int16_t y, rt_int16_t r, rt_int16_t start, rt_int16_t end)
|
|
{
|
|
rt_int16_t cx = 0;
|
|
rt_int16_t cy = r;
|
|
rt_int16_t df = 1 - r;
|
|
rt_int16_t d_e = 3;
|
|
rt_int16_t d_se = -2 * r + 5;
|
|
rt_int16_t xpcx, xmcx, xpcy, xmcy;
|
|
rt_int16_t ypcy, ymcy, ypcx, ymcx;
|
|
rt_uint8_t drawoct;
|
|
int startoct, endoct, oct, stopval_start, stopval_end;
|
|
double temp;
|
|
|
|
stopval_start = 0;
|
|
stopval_end = 0;
|
|
temp = 0;
|
|
|
|
/* Sanity check radius */
|
|
if (r < 0) return ;
|
|
/* Special case for r=0 - draw a point */
|
|
if (r == 0)
|
|
{
|
|
rtgui_dc_draw_point(dc, x, y);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Draw arc
|
|
*/
|
|
|
|
// Octant labelling
|
|
//
|
|
// \ 5 | 6 /
|
|
// \ | /
|
|
// 4 \ | / 7
|
|
// \|/
|
|
//------+------ +x
|
|
// /|\
|
|
// 3 / | \ 0
|
|
// / | \
|
|
// / 2 | 1 \
|
|
// +y
|
|
|
|
drawoct = 0; // 0x00000000
|
|
// whether or not to keep drawing a given octant.
|
|
// For example: 0x00111100 means we're drawing in octants 2-5
|
|
|
|
// 0 <= start & end < 360; note that sometimes start > end - if so, arc goes back through 0.
|
|
while (start < 0) start += 360;
|
|
while (end < 0) end += 360;
|
|
/* Fixup angles */
|
|
start = start % 360;
|
|
end = end % 360;
|
|
|
|
|
|
// now, we find which octants we're drawing in.
|
|
startoct = start / 45;
|
|
endoct = end / 45;
|
|
oct = startoct - 1; // we increment as first step in loop
|
|
|
|
//stopval_start, stopval_end; // what values of cx to stop at.
|
|
do
|
|
{
|
|
oct = (oct + 1) % 8;
|
|
|
|
if (oct == startoct)
|
|
{
|
|
// need to compute stopval_start for this octant. Look at picture above if this is unclear
|
|
switch (oct)
|
|
{
|
|
case 0:
|
|
case 3:
|
|
temp = sin(start * M_PI / 180);
|
|
break;
|
|
case 1:
|
|
case 6:
|
|
temp = cos(start * M_PI / 180);
|
|
break;
|
|
case 2:
|
|
case 5:
|
|
temp = -cos(start * M_PI / 180);
|
|
break;
|
|
case 4:
|
|
case 7:
|
|
temp = -sin(start * M_PI / 180);
|
|
break;
|
|
}
|
|
temp *= r;
|
|
stopval_start = (int)temp; // always round down.
|
|
// This isn't arbitrary, but requires graph paper to explain well.
|
|
// The basic idea is that we're always changing drawoct after we draw, so we
|
|
// stop immediately after we render the last sensible pixel at x = ((int)temp).
|
|
|
|
// and whether to draw in this octant initially
|
|
if (oct % 2) drawoct |= (1 << oct); // this is basically like saying drawoct[oct] = true, if drawoct were a bool array
|
|
else drawoct &= 255 - (1 << oct); // this is basically like saying drawoct[oct] = false
|
|
}
|
|
|
|
if (oct == endoct)
|
|
{
|
|
// need to compute stopval_end for this octant
|
|
switch (oct)
|
|
{
|
|
case 0:
|
|
case 3:
|
|
temp = sin(end * M_PI / 180);
|
|
break;
|
|
case 1:
|
|
case 6:
|
|
temp = cos(end * M_PI / 180);
|
|
break;
|
|
case 2:
|
|
case 5:
|
|
temp = -cos(end * M_PI / 180);
|
|
break;
|
|
case 4:
|
|
case 7:
|
|
temp = -sin(end * M_PI / 180);
|
|
break;
|
|
}
|
|
temp *= r;
|
|
stopval_end = (int)temp;
|
|
|
|
// and whether to draw in this octant initially
|
|
if (startoct == endoct)
|
|
{
|
|
// note: we start drawing, stop, then start again in this case
|
|
// otherwise: we only draw in this octant, so initialize it to false, it will get set back to true
|
|
if (start > end)
|
|
{
|
|
// unfortunately, if we're in the same octant and need to draw over the whole circle,
|
|
// we need to set the rest to true, because the while loop will end at the bottom.
|
|
drawoct = 255;
|
|
}
|
|
else
|
|
{
|
|
drawoct &= 255 - (1 << oct);
|
|
}
|
|
}
|
|
else if (oct % 2) drawoct &= 255 - (1 << oct);
|
|
else drawoct |= (1 << oct);
|
|
}
|
|
else if (oct != startoct) // already verified that it's != endoct
|
|
{
|
|
drawoct |= (1 << oct); // draw this entire segment
|
|
}
|
|
}
|
|
while (oct != endoct);
|
|
|
|
// so now we have what octants to draw and when to draw them. all that's left is the actual raster code.
|
|
do
|
|
{
|
|
ypcy = y + cy;
|
|
ymcy = y - cy;
|
|
if (cx > 0)
|
|
{
|
|
xpcx = x + cx;
|
|
xmcx = x - cx;
|
|
// always check if we're drawing a certain octant before adding a pixel to that octant.
|
|
if (drawoct & 4) rtgui_dc_draw_point(dc, xmcx, ypcy); // drawoct & 4 = 22; drawoct[2]
|
|
if (drawoct & 2) rtgui_dc_draw_point(dc, xpcx, ypcy);
|
|
if (drawoct & 32) rtgui_dc_draw_point(dc, xmcx, ymcy);
|
|
if (drawoct & 64) rtgui_dc_draw_point(dc, xpcx, ymcy);
|
|
}
|
|
else
|
|
{
|
|
if (drawoct & 6) rtgui_dc_draw_point(dc, x, ypcy); // 4 + 2; drawoct[2] || drawoct[1]
|
|
if (drawoct & 96) rtgui_dc_draw_point(dc, x, ymcy); // 32 + 64
|
|
}
|
|
|
|
xpcy = x + cy;
|
|
xmcy = x - cy;
|
|
if (cx > 0 && cx != cy)
|
|
{
|
|
ypcx = y + cx;
|
|
ymcx = y - cx;
|
|
if (drawoct & 8) rtgui_dc_draw_point(dc, xmcy, ypcx);
|
|
if (drawoct & 1) rtgui_dc_draw_point(dc, xpcy, ypcx);
|
|
if (drawoct & 16) rtgui_dc_draw_point(dc, xmcy, ymcx);
|
|
if (drawoct & 128) rtgui_dc_draw_point(dc, xpcy, ymcx);
|
|
}
|
|
else if (cx == 0)
|
|
{
|
|
if (drawoct & 24) rtgui_dc_draw_point(dc, xmcy, y); // 8 + 16
|
|
if (drawoct & 129) rtgui_dc_draw_point(dc, xpcy, y); // 1 + 128
|
|
}
|
|
|
|
/*
|
|
* Update whether we're drawing an octant
|
|
*/
|
|
if (stopval_start == cx)
|
|
{
|
|
// works like an on-off switch because start & end may be in the same octant.
|
|
if (drawoct & (1 << startoct)) drawoct &= 255 - (1 << startoct);
|
|
else drawoct |= (1 << startoct);
|
|
}
|
|
if (stopval_end == cx)
|
|
{
|
|
if (drawoct & (1 << endoct)) drawoct &= 255 - (1 << endoct);
|
|
else drawoct |= (1 << endoct);
|
|
}
|
|
|
|
/*
|
|
* Update pixels
|
|
*/
|
|
if (df < 0)
|
|
{
|
|
df += d_e;
|
|
d_e += 2;
|
|
d_se += 2;
|
|
}
|
|
else
|
|
{
|
|
df += d_se;
|
|
d_e += 2;
|
|
d_se += 4;
|
|
cy--;
|
|
}
|
|
|
|
cx++;
|
|
}
|
|
while (cx <= cy);
|
|
}
|
|
RTM_EXPORT(rtgui_dc_draw_arc);
|
|
|
|
void rtgui_dc_draw_annulus(struct rtgui_dc *dc, rt_int16_t x, rt_int16_t y, rt_int16_t r1, rt_int16_t r2, rt_int16_t start, rt_int16_t end)
|
|
{
|
|
rt_int16_t start_x, start_y;
|
|
rt_int16_t end_x, end_y;
|
|
double temp;
|
|
rt_int16_t temp_val = 0;
|
|
|
|
/* Sanity check radius */
|
|
if ((r1 < 0) || (r2 < 0)) return ;
|
|
/* Special case for r=0 - draw a point */
|
|
if ((r1 == 0) && (r2 == 0))
|
|
{
|
|
rtgui_dc_draw_point(dc, x, y);
|
|
return;
|
|
}
|
|
|
|
while (start < 0) start += 360;
|
|
while (end < 0) end += 360;
|
|
|
|
rtgui_dc_draw_arc(dc, x, y, r1, start, end);
|
|
rtgui_dc_draw_arc(dc, x, y, r2, start, end);
|
|
|
|
temp = cos(start * M_PI / 180);
|
|
temp_val = (int)(temp * r1);
|
|
start_x = x + temp_val;
|
|
temp_val = (int)(temp * r2);
|
|
end_x = x + temp_val;
|
|
|
|
temp = sin(start * M_PI / 180);
|
|
temp_val = (int)(temp * r1);
|
|
start_y = y + temp_val;
|
|
temp_val = (int)(temp * r2);
|
|
end_y = y + temp_val;
|
|
|
|
rtgui_dc_draw_line(dc, start_x, start_y, end_x, end_y);
|
|
|
|
temp = cos(end * M_PI / 180);
|
|
temp_val = (int)(temp * r1);
|
|
start_x = x + temp_val;
|
|
temp_val = (int)(temp * r2);
|
|
end_x = x + temp_val;
|
|
|
|
temp = sin(end * M_PI / 180);
|
|
temp_val = (int)(temp * r1);
|
|
start_y = y + temp_val;
|
|
temp_val = (int)(temp * r2);
|
|
end_y = y + temp_val;
|
|
|
|
rtgui_dc_draw_line(dc, start_x, start_y, end_x, end_y);
|
|
}
|
|
RTM_EXPORT(rtgui_dc_draw_annulus);
|
|
|
|
void rtgui_dc_draw_sector(struct rtgui_dc *dc, rt_int16_t x, rt_int16_t y, rt_int16_t r, rt_int16_t start, rt_int16_t end)
|
|
{
|
|
int start_x, start_y;
|
|
int end_x, end_y;
|
|
|
|
/* Sanity check radius */
|
|
if (r < 0) return ;
|
|
/* Special case for r=0 - draw a point */
|
|
if (r == 0)
|
|
{
|
|
rtgui_dc_draw_point(dc, x, y);
|
|
return;
|
|
}
|
|
|
|
while (start < 0) start += 360;
|
|
while (end < 0) end += 360;
|
|
|
|
/* Fixup angles */
|
|
start = start % 360;
|
|
end = end % 360;
|
|
|
|
rtgui_dc_draw_arc(dc, x, y, r, start, end);
|
|
|
|
start_x = x + r * cos(start * M_PI / 180);
|
|
start_y = y + r * sin(start * M_PI / 180);
|
|
|
|
end_x = x + r * cos(end * M_PI / 180);
|
|
end_y = y + r * sin(end * M_PI / 180);
|
|
|
|
rtgui_dc_draw_line(dc, x, y, start_x, start_y);
|
|
rtgui_dc_draw_line(dc, x, y, end_x, end_y);
|
|
}
|
|
RTM_EXPORT(rtgui_dc_draw_sector);
|
|
|
|
void rtgui_dc_fill_sector(struct rtgui_dc *dc, rt_int16_t x, rt_int16_t y, rt_int16_t r, rt_int16_t start, rt_int16_t end)
|
|
{
|
|
int start_x, start_y;
|
|
int end_x, end_y;
|
|
|
|
/* Sanity check radius */
|
|
if (r < 0) return ;
|
|
/* Special case for r=0 - draw a point */
|
|
if (r == 0)
|
|
{
|
|
rtgui_dc_draw_point(dc, x, y);
|
|
return;
|
|
}
|
|
|
|
while (start < 0) start += 360;
|
|
while (end < 0) end += 360;
|
|
|
|
/* Fixup angles */
|
|
start = start % 360;
|
|
end = end % 360;
|
|
|
|
end_x = x + r * cos(end * M_PI / 180);
|
|
end_y = y + r * sin(end * M_PI / 180);
|
|
|
|
do
|
|
{
|
|
start_x = x + r * cos(start * M_PI / 180);
|
|
start_y = y + r * sin(start * M_PI / 180);
|
|
start ++;
|
|
|
|
rtgui_dc_draw_line(dc, x, y, start_x, start_y);
|
|
}
|
|
while (!((start_x == end_x) && (start_y == end_y)));
|
|
}
|
|
RTM_EXPORT(rtgui_dc_fill_sector);
|
|
|
|
void rtgui_dc_draw_ellipse(struct rtgui_dc *dc, rt_int16_t x, rt_int16_t y, rt_int16_t rx, rt_int16_t ry)
|
|
{
|
|
int ix, iy;
|
|
int h, i, j, k;
|
|
int oh, oi, oj, ok;
|
|
int xmh, xph, ypk, ymk;
|
|
int xmi, xpi, ymj, ypj;
|
|
int xmj, xpj, ymi, ypi;
|
|
int xmk, xpk, ymh, yph;
|
|
|
|
/*
|
|
* Sanity check radii
|
|
*/
|
|
if ((rx < 0) || (ry < 0)) return;
|
|
|
|
/*
|
|
* Special case for rx=0 - draw a vline
|
|
*/
|
|
if (rx == 0)
|
|
{
|
|
rtgui_dc_draw_vline(dc, x, y - ry, y + ry);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Special case for ry=0 - draw a hline
|
|
*/
|
|
if (ry == 0)
|
|
{
|
|
rtgui_dc_draw_hline(dc, x - rx, x + rx, y);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Init vars
|
|
*/
|
|
oh = oi = oj = ok = 0xFFFF;
|
|
|
|
if (rx > ry)
|
|
{
|
|
ix = 0;
|
|
iy = rx * 64;
|
|
|
|
do
|
|
{
|
|
h = (ix + 32) >> 6;
|
|
i = (iy + 32) >> 6;
|
|
j = (h * ry) / rx;
|
|
k = (i * ry) / rx;
|
|
|
|
if (((ok != k) && (oj != k)) || ((oj != j) && (ok != j)) || (k != j))
|
|
{
|
|
xph = x + h;
|
|
xmh = x - h;
|
|
if (k > 0)
|
|
{
|
|
ypk = y + k;
|
|
ymk = y - k;
|
|
rtgui_dc_draw_point(dc, xmh, ypk);
|
|
rtgui_dc_draw_point(dc, xph, ypk);
|
|
rtgui_dc_draw_point(dc, xmh, ymk);
|
|
rtgui_dc_draw_point(dc, xph, ymk);
|
|
}
|
|
else
|
|
{
|
|
rtgui_dc_draw_point(dc, xmh, y);
|
|
rtgui_dc_draw_point(dc, xph, y);
|
|
}
|
|
ok = k;
|
|
xpi = x + i;
|
|
xmi = x - i;
|
|
if (j > 0)
|
|
{
|
|
ypj = y + j;
|
|
ymj = y - j;
|
|
rtgui_dc_draw_point(dc, xmi, ypj);
|
|
rtgui_dc_draw_point(dc, xpi, ypj);
|
|
rtgui_dc_draw_point(dc, xmi, ymj);
|
|
rtgui_dc_draw_point(dc, xpi, ymj);
|
|
}
|
|
else
|
|
{
|
|
rtgui_dc_draw_point(dc, xmi, y);
|
|
rtgui_dc_draw_point(dc, xpi, y);
|
|
}
|
|
oj = j;
|
|
}
|
|
|
|
ix = ix + iy / rx;
|
|
iy = iy - ix / rx;
|
|
}
|
|
while (i > h);
|
|
}
|
|
else
|
|
{
|
|
ix = 0;
|
|
iy = ry * 64;
|
|
|
|
do
|
|
{
|
|
h = (ix + 32) >> 6;
|
|
i = (iy + 32) >> 6;
|
|
j = (h * rx) / ry;
|
|
k = (i * rx) / ry;
|
|
|
|
if (((oi != i) && (oh != i)) || ((oh != h) && (oi != h) && (i != h)))
|
|
{
|
|
xmj = x - j;
|
|
xpj = x + j;
|
|
if (i > 0)
|
|
{
|
|
ypi = y + i;
|
|
ymi = y - i;
|
|
rtgui_dc_draw_point(dc, xmj, ypi);
|
|
rtgui_dc_draw_point(dc, xpj, ypi);
|
|
rtgui_dc_draw_point(dc, xmj, ymi);
|
|
rtgui_dc_draw_point(dc, xpj, ymi);
|
|
}
|
|
else
|
|
{
|
|
rtgui_dc_draw_point(dc, xmj, y);
|
|
rtgui_dc_draw_point(dc, xpj, y);
|
|
}
|
|
oi = i;
|
|
xmk = x - k;
|
|
xpk = x + k;
|
|
if (h > 0)
|
|
{
|
|
yph = y + h;
|
|
ymh = y - h;
|
|
rtgui_dc_draw_point(dc, xmk, yph);
|
|
rtgui_dc_draw_point(dc, xpk, yph);
|
|
rtgui_dc_draw_point(dc, xmk, ymh);
|
|
rtgui_dc_draw_point(dc, xpk, ymh);
|
|
}
|
|
else
|
|
{
|
|
rtgui_dc_draw_point(dc, xmk, y);
|
|
rtgui_dc_draw_point(dc, xpk, y);
|
|
}
|
|
oh = h;
|
|
}
|
|
|
|
ix = ix + iy / ry;
|
|
iy = iy - ix / ry;
|
|
}
|
|
while (i > h);
|
|
}
|
|
}
|
|
RTM_EXPORT(rtgui_dc_draw_ellipse);
|
|
|
|
void rtgui_dc_fill_ellipse(struct rtgui_dc *dc, rt_int16_t x, rt_int16_t y, rt_int16_t rx, rt_int16_t ry)
|
|
{
|
|
int ix, iy;
|
|
int h, i, j, k;
|
|
int oh, oi, oj, ok;
|
|
int xmh, xph;
|
|
int xmi, xpi;
|
|
int xmj, xpj;
|
|
int xmk, xpk;
|
|
|
|
/*
|
|
* Special case for rx=0 - draw a vline
|
|
*/
|
|
if (rx == 0)
|
|
{
|
|
rtgui_dc_draw_vline(dc, x, y - ry, y + ry);
|
|
return;
|
|
}
|
|
|
|
/* special case for ry=0 - draw a hline */
|
|
if (ry == 0)
|
|
{
|
|
rtgui_dc_draw_hline(dc, x - rx, x + rx, y);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Init vars
|
|
*/
|
|
oh = oi = oj = ok = 0xFFFF;
|
|
|
|
/*
|
|
* Draw
|
|
*/
|
|
if (rx > ry)
|
|
{
|
|
ix = 0;
|
|
iy = rx * 64;
|
|
|
|
do
|
|
{
|
|
h = (ix + 32) >> 6;
|
|
i = (iy + 32) >> 6;
|
|
j = (h * ry) / rx;
|
|
k = (i * ry) / rx;
|
|
|
|
if ((ok != k) && (oj != k))
|
|
{
|
|
xph = x + h;
|
|
xmh = x - h;
|
|
if (k > 0)
|
|
{
|
|
rtgui_dc_draw_hline(dc, xmh, xph, y + k);
|
|
rtgui_dc_draw_hline(dc, xmh, xph, y - k);
|
|
}
|
|
else
|
|
{
|
|
rtgui_dc_draw_hline(dc, xmh, xph, y);
|
|
}
|
|
ok = k;
|
|
}
|
|
if ((oj != j) && (ok != j) && (k != j))
|
|
{
|
|
xmi = x - i;
|
|
xpi = x + i;
|
|
if (j > 0)
|
|
{
|
|
rtgui_dc_draw_hline(dc, xmi, xpi, y + j);
|
|
rtgui_dc_draw_hline(dc, xmi, xpi, y - j);
|
|
}
|
|
else
|
|
{
|
|
rtgui_dc_draw_hline(dc, xmi, xpi, y);
|
|
}
|
|
oj = j;
|
|
}
|
|
|
|
ix = ix + iy / rx;
|
|
iy = iy - ix / rx;
|
|
|
|
}
|
|
while (i > h);
|
|
}
|
|
else
|
|
{
|
|
ix = 0;
|
|
iy = ry * 64;
|
|
|
|
do
|
|
{
|
|
h = (ix + 32) >> 6;
|
|
i = (iy + 32) >> 6;
|
|
j = (h * rx) / ry;
|
|
k = (i * rx) / ry;
|
|
|
|
if ((oi != i) && (oh != i))
|
|
{
|
|
xmj = x - j;
|
|
xpj = x + j;
|
|
if (i > 0)
|
|
{
|
|
rtgui_dc_draw_hline(dc, xmj, xpj, y + i);
|
|
rtgui_dc_draw_hline(dc, xmj, xpj, y - i);
|
|
}
|
|
else
|
|
{
|
|
rtgui_dc_draw_hline(dc, xmj, xpj, y);
|
|
}
|
|
oi = i;
|
|
}
|
|
if ((oh != h) && (oi != h) && (i != h))
|
|
{
|
|
xmk = x - k;
|
|
xpk = x + k;
|
|
if (h > 0)
|
|
{
|
|
rtgui_dc_draw_hline(dc, xmk, xpk, y + h);
|
|
rtgui_dc_draw_hline(dc, xmk, xpk, y - h);
|
|
}
|
|
else
|
|
{
|
|
rtgui_dc_draw_hline(dc, xmk, xpk, y);
|
|
}
|
|
oh = h;
|
|
}
|
|
ix = ix + iy / ry;
|
|
iy = iy - ix / ry;
|
|
}
|
|
while (i > h);
|
|
}
|
|
}
|
|
RTM_EXPORT(rtgui_dc_fill_ellipse);
|
|
|