Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	gx_canvas_pie_draw.c	Lines:	56	56	100.0 %
Date:	2024-12-05 08:52:37	Branches:	40	40	100.0 %


/***************************************************************************
 * Copyright (c) 2024 Microsoft Corporation
 *
 * This program and the accompanying materials are made available under the
 * terms of the MIT License which is available at
 * https://opensource.org/licenses/MIT.
 *
 * SPDX-License-Identifier: MIT
 **************************************************************************/


/**************************************************************************/
/**************************************************************************/
/**                                                                       */
/** GUIX Component                                                        */
/**                                                                       */
/**   Display Management (Display)                                        */
/**                                                                       */
/**************************************************************************/

#define GX_SOURCE_CODE


/* Include necessary system files.  */

#include "gx_api.h"
#include "gx_system.h"
#include "gx_utility.h"
#include "gx_display.h"
#include "gx_canvas.h"

/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _gx_canvas_pie_draw                                 PORTABLE C      */
/*                                                           6.1          */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Kenneth Maxwell, Microsoft Corporation                              */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This draws a pie into the currrent context.                         */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    xcenter                               x-coord of center of circle   */
/*                                            arc                         */
/*    ycenter                               y-coord of center of circle   */
/*                                            arc                         */
/*    r                                     Radius of circle arc          */
/*    start_angle                           The start angle of circle arc */
/*    end_angle                             The end angle of circle arc   */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    None                                                                */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    _gx_utility_rectangle_define          Define a rectangle            */
/*    _gx_utility_rectangle_overlap_detect  Detect rectangle overlap      */
/*    [gx_display_driver_pie_fill]          Display driver basic          */
/*                                            pie drawing routine         */
/*    [gx_display_driver_arc_draw]          Display driver basic          */
/*                                            arc drawing routine         */
/*    _gx_display_driver_anti_aliased_arc_draw                            */
/*                                          Display driver basic aliased  */
/*                                            arc drawing routine         */
/*    _gx_utility_circle_point_get          Get point position on a circle*/
/*    _gx_canvas_line_draw                  Draw a line                   */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    Application code                                                    */
/*                                                                        */
/*  RELEASE HISTORY                                                       */
/*                                                                        */
/*    DATE              NAME                      DESCRIPTION             */
/*                                                                        */
/*  05-19-2020     Kenneth Maxwell          Initial Version 6.0           */
/*  09-30-2020     Kenneth Maxwell          Modified comment(s),          */
/*                                            resulting in version 6.1    */
/*                                                                        */
/**************************************************************************/
#if defined(GX_ARC_DRAWING_SUPPORT)
UINT _gx_canvas_pie_draw(INT xcenter, INT ycenter, UINT r, INT start_angle, INT end_angle)
{
/* A pie is a fraction of a circle delimited by two lines that span from the center of the
   circle to the one side each. */

GX_DRAW_CONTEXT *context;
GX_DISPLAY      *display;
GX_RECTANGLE     bound;
GX_RECTANGLE     clip_rect;
GX_VIEW         *view;
GX_BRUSH        *brush;
GX_POINT         point;
INT              brush_width;
VOID             (*outline_function)(GX_DRAW_CONTEXT *context, INT xcenter, INT ycenter, UINT r, INT start_angle, INT end_angle);

#if defined(GX_BRUSH_ALPHA_SUPPORT)
GX_UBYTE brush_alpha;
#endif

    while (start_angle < 0)
    {
        start_angle += 360;
    }

    while (end_angle < 0)
    {
        end_angle += 360;
    }

    if (start_angle >= 360)
    {
        start_angle %= 360;
    }

    if (end_angle >= 360)
    {
        end_angle %= 360;
    }

    if (end_angle <= start_angle)
    {
        end_angle += 360;
    }
    /* pick up the current drawing context */
    context = _gx_system_current_draw_context;

    brush = &context -> gx_draw_context_brush;

    brush_width = ((INT)(brush -> gx_brush_width + 1)) >> 1;

    /* Define pie bounding rectangle. */
    _gx_utility_rectangle_define(&bound, (GX_VALUE)(xcenter - (INT)r - brush_width), (GX_VALUE)(ycenter - (INT)r - brush_width),
                                 (GX_VALUE)(xcenter + (INT)r + brush_width), (GX_VALUE)(ycenter + (INT)r + brush_width));

    brush_width = brush -> gx_brush_width;


    /* clip the pie bounding box to the dirty rectangle */
    if (!_gx_utility_rectangle_overlap_detect(&bound, &context -> gx_draw_context_dirty, &bound))
    {
        /* nothing to draw, return */
        return GX_SUCCESS;
    }

    /* pick up current display driver */
    display = context -> gx_draw_context_display;

    /* Determine outline function to utilize.*/
    outline_function = GX_NULL;

    /* Determine which outline function to use.*/
    if (brush_width == 1)
    {
        /* if anti-alias is requested and this is supported by display, use it */
        if ((brush -> gx_brush_style & GX_BRUSH_ALIAS) &&
            display -> gx_display_driver_anti_aliased_arc_draw != GX_NULL)
        {
            outline_function = display -> gx_display_driver_anti_aliased_arc_draw;
        }
        else
        {
            /* otherwise use non-aliased outline */
            outline_function = display -> gx_display_driver_arc_draw;
        }
    }
    else
    {
        if (brush_width > 1)
        {
            /* if anti-alias is requested and this is supported by display, use it */
            if ((brush -> gx_brush_style & GX_BRUSH_ALIAS) &&
                display -> gx_display_driver_anti_aliased_wide_arc_draw)
            {
                outline_function = display -> gx_display_driver_anti_aliased_wide_arc_draw;
            }
            else
            {
                /* otherwise use non-aliased outline */
                outline_function = display -> gx_display_driver_wide_arc_draw;
            }
        }
    }

    /* test to determine if the bounding rectangle overlaps the region we are allowed to draw
       into. For each view that overlaps the bounding rectangle, do some drawing.
     */
    view = context -> gx_draw_context_view_head;

    while (view)
    {
        if (!_gx_utility_rectangle_overlap_detect(&view -> gx_view_rectangle, &bound, &clip_rect))
        {
            view = view -> gx_view_next;
            continue;
        }

        /* we have a view into which we can draw the arc, do it */
        context -> gx_draw_context_clip = &clip_rect;

        if (brush_width)
        {
            brush_width -= 1;
            brush_width >>= 1;
        }

        if ((brush -> gx_brush_style & (GX_BRUSH_SOLID_FILL | GX_BRUSH_PIXELMAP_FILL)) &&
            (r > (UINT)brush_width))
        {
            display -> gx_display_driver_pie_fill(context, xcenter, ycenter, r - (UINT)brush_width, start_angle, end_angle);
        }

#if defined(GX_BRUSH_ALPHA_SUPPORT)
        brush_alpha = context -> gx_draw_context_brush.gx_brush_alpha;
        if (brush -> gx_brush_width > 1)
        {
            context -> gx_draw_context_brush.gx_brush_alpha = GX_ALPHA_VALUE_OPAQUE;
        }
#endif
        if (outline_function)
        {
            outline_function(context, xcenter, ycenter, r, start_angle, end_angle);
        }

        if (r > (UINT)brush_width)
        {
            _gx_utility_circle_point_get(xcenter, ycenter, r - (UINT)brush_width, start_angle, &point);

            /* Draw delimiting line. */
            _gx_canvas_line_draw((GX_VALUE)xcenter, (GX_VALUE)ycenter, point.gx_point_x, point.gx_point_y);

            _gx_utility_circle_point_get(xcenter, ycenter, r - (UINT)brush_width, end_angle, &point);

            /* Draw delimiting line. */
            _gx_canvas_line_draw((GX_VALUE)xcenter, (GX_VALUE)ycenter, point.gx_point_x, point.gx_point_y);
        }

#if defined(GX_BRUSH_ALPHA_SUPPORT)
        context -> gx_draw_context_brush.gx_brush_alpha = brush_alpha;
#endif
        view = view -> gx_view_next;
    }

    /* Return successful completion.  */
    return(GX_SUCCESS);
}

#endif



Generated by: GCOVR (Version 4.1)

Line	Branch	Exec	Source
1			/***************************************************************************
2			* Copyright (c) 2024 Microsoft Corporation
3			*
4			* This program and the accompanying materials are made available under the
5			* terms of the MIT License which is available at
6			* https://opensource.org/licenses/MIT.
7			*
8			* SPDX-License-Identifier: MIT
9			**************************************************************************/
10
11
12			/**************************************************************************/
13			/**************************************************************************/
14			/** */
15			/** GUIX Component */
16			/** */
17			/** Display Management (Display) */
18			/** */
19			/**************************************************************************/
20
21			#define GX_SOURCE_CODE
22
23
24			/* Include necessary system files. */
25
26			#include "gx_api.h"
27			#include "gx_system.h"
28			#include "gx_utility.h"
29			#include "gx_display.h"
30			#include "gx_canvas.h"
31
32			/**************************************************************************/
33			/* */
34			/* FUNCTION RELEASE */
35			/* */
36			/* _gx_canvas_pie_draw PORTABLE C */
37			/* 6.1 */
38			/* AUTHOR */
39			/* */
40			/* Kenneth Maxwell, Microsoft Corporation */
41			/* */
42			/* DESCRIPTION */
43			/* */
44			/* This draws a pie into the currrent context. */
45			/* */
46			/* INPUT */
47			/* */
48			/* xcenter x-coord of center of circle */
49			/* arc */
50			/* ycenter y-coord of center of circle */
51			/* arc */
52			/* r Radius of circle arc */
53			/* start_angle The start angle of circle arc */
54			/* end_angle The end angle of circle arc */
55			/* */
56			/* OUTPUT */
57			/* */
58			/* None */
59			/* */
60			/* CALLS */
61			/* */
62			/* _gx_utility_rectangle_define Define a rectangle */
63			/* _gx_utility_rectangle_overlap_detect Detect rectangle overlap */
64			/* [gx_display_driver_pie_fill] Display driver basic */
65			/* pie drawing routine */
66			/* [gx_display_driver_arc_draw] Display driver basic */
67			/* arc drawing routine */
68			/* _gx_display_driver_anti_aliased_arc_draw */
69			/* Display driver basic aliased */
70			/* arc drawing routine */
71			/* _gx_utility_circle_point_get Get point position on a circle*/
72			/* _gx_canvas_line_draw Draw a line */
73			/* */
74			/* CALLED BY */
75			/* */
76			/* Application code */
77			/* */
78			/* RELEASE HISTORY */
79			/* */
80			/* DATE NAME DESCRIPTION */
81			/* */
82			/* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
83			/* 09-30-2020 Kenneth Maxwell Modified comment(s), */
84			/* resulting in version 6.1 */
85			/* */
86			/**************************************************************************/
87			#if defined(GX_ARC_DRAWING_SUPPORT)
88		2703	UINT _gx_canvas_pie_draw(INT xcenter, INT ycenter, UINT r, INT start_angle, INT end_angle)
89			{
90			/* A pie is a fraction of a circle delimited by two lines that span from the center of the
91			circle to the one side each. */
92
93			GX_DRAW_CONTEXT *context;
94			GX_DISPLAY *display;
95			GX_RECTANGLE bound;
96			GX_RECTANGLE clip_rect;
97			GX_VIEW *view;
98			GX_BRUSH *brush;
99			GX_POINT point;
100			INT brush_width;
101			VOID (outline_function)(GX_DRAW_CONTEXT context, INT xcenter, INT ycenter, UINT r, INT start_angle, INT end_angle);
102
103			#if defined(GX_BRUSH_ALPHA_SUPPORT)
104			GX_UBYTE brush_alpha;
105			#endif
106
107	✓✓	2867	while (start_angle < 0)
108			{
109		164	start_angle += 360;
110			}
111
112	✓✓	2751	while (end_angle < 0)
113			{
114		48	end_angle += 360;
115			}
116
117	✓✓	2703	if (start_angle >= 360)
118			{
119		408	start_angle %= 360;
120			}
121
122	✓✓	2703	if (end_angle >= 360)
123			{
124		600	end_angle %= 360;
125			}
126
127	✓✓	2703	if (end_angle <= start_angle)
128			{
129		620	end_angle += 360;
130			}
131			/* pick up the current drawing context */
132		2703	context = _gx_system_current_draw_context;
133
134		2703	brush = &context -> gx_draw_context_brush;
135
136		2703	brush_width = ((INT)(brush -> gx_brush_width + 1)) >> 1;
137
138			/* Define pie bounding rectangle. */
139		2703	_gx_utility_rectangle_define(&bound, (GX_VALUE)(xcenter - (INT)r - brush_width), (GX_VALUE)(ycenter - (INT)r - brush_width),
140		2703	(GX_VALUE)(xcenter + (INT)r + brush_width), (GX_VALUE)(ycenter + (INT)r + brush_width));
141
142		2703	brush_width = brush -> gx_brush_width;
143
144
145			/* clip the pie bounding box to the dirty rectangle */
146	✓✓	2703	if (!_gx_utility_rectangle_overlap_detect(&bound, &context -> gx_draw_context_dirty, &bound))
147			{
148			/* nothing to draw, return */
149		4	return GX_SUCCESS;
150			}
151
152			/* pick up current display driver */
153		2699	display = context -> gx_draw_context_display;
154
155			/* Determine outline function to utilize.*/
156		2699	outline_function = GX_NULL;
157
158			/* Determine which outline function to use.*/
159	✓✓	2699	if (brush_width == 1)
160			{
161			/* if anti-alias is requested and this is supported by display, use it */
162	✓✓	677	if ((brush -> gx_brush_style & GX_BRUSH_ALIAS) &&
163	✓✓	496	display -> gx_display_driver_anti_aliased_arc_draw != GX_NULL)
164			{
165		368	outline_function = display -> gx_display_driver_anti_aliased_arc_draw;
166			}
167			else
168			{
169			/* otherwise use non-aliased outline */
170		309	outline_function = display -> gx_display_driver_arc_draw;
171			}
172			}
173			else
174			{
175	✓✓	2022	if (brush_width > 1)
176			{
177			/* if anti-alias is requested and this is supported by display, use it */
178	✓✓	1604	if ((brush -> gx_brush_style & GX_BRUSH_ALIAS) &&
179	✓✓	1288	display -> gx_display_driver_anti_aliased_wide_arc_draw)
180			{
181		1024	outline_function = display -> gx_display_driver_anti_aliased_wide_arc_draw;
182			}
183			else
184			{
185			/* otherwise use non-aliased outline */
186		580	outline_function = display -> gx_display_driver_wide_arc_draw;
187			}
188			}
189			}
190
191			/* test to determine if the bounding rectangle overlaps the region we are allowed to draw
192			into. For each view that overlaps the bounding rectangle, do some drawing.
193			*/
194		2699	view = context -> gx_draw_context_view_head;
195
196	✓✓	5410	while (view)
197			{
198	✓✓	2711	if (!_gx_utility_rectangle_overlap_detect(&view -> gx_view_rectangle, &bound, &clip_rect))
199			{
200		16	view = view -> gx_view_next;
201		16	continue;
202			}
203
204			/* we have a view into which we can draw the arc, do it */
205		2695	context -> gx_draw_context_clip = &clip_rect;
206
207	✓✓	2695	if (brush_width)
208			{
209		2277	brush_width -= 1;
210		2277	brush_width >>= 1;
211			}
212
213	✓✓	2695	if ((brush -> gx_brush_style & (GX_BRUSH_SOLID_FILL \| GX_BRUSH_PIXELMAP_FILL)) &&
214	✓✓	2351	(r > (UINT)brush_width))
215			{
216		2159	display -> gx_display_driver_pie_fill(context, xcenter, ycenter, r - (UINT)brush_width, start_angle, end_angle);
217			}
218
219			#if defined(GX_BRUSH_ALPHA_SUPPORT)
220		2695	brush_alpha = context -> gx_draw_context_brush.gx_brush_alpha;
221	✓✓	2695	if (brush -> gx_brush_width > 1)
222			{
223		1600	context -> gx_draw_context_brush.gx_brush_alpha = GX_ALPHA_VALUE_OPAQUE;
224			}
225			#endif
226	✓✓	2695	if (outline_function)
227			{
228		2277	outline_function(context, xcenter, ycenter, r, start_angle, end_angle);
229			}
230
231	✓✓	2695	if (r > (UINT)brush_width)
232			{
233		2439	_gx_utility_circle_point_get(xcenter, ycenter, r - (UINT)brush_width, start_angle, &point);
234
235			/* Draw delimiting line. */
236		2439	_gx_canvas_line_draw((GX_VALUE)xcenter, (GX_VALUE)ycenter, point.gx_point_x, point.gx_point_y);
237
238		2439	_gx_utility_circle_point_get(xcenter, ycenter, r - (UINT)brush_width, end_angle, &point);
239
240			/* Draw delimiting line. */
241		2439	_gx_canvas_line_draw((GX_VALUE)xcenter, (GX_VALUE)ycenter, point.gx_point_x, point.gx_point_y);
242			}
243
244			#if defined(GX_BRUSH_ALPHA_SUPPORT)
245		2695	context -> gx_draw_context_brush.gx_brush_alpha = brush_alpha;
246			#endif
247		2695	view = view -> gx_view_next;
248			}
249
250			/* Return successful completion. */
251		2699	return(GX_SUCCESS);
252			}
253
254			#endif
255