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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	gx_display_driver_generic_arc_draw.c	Lines:	60	60	100.0 %
Date:	2026-03-06 19:21:09	Branches:	50	50	100.0 %


/***************************************************************************
 * Copyright (c) 2024 Microsoft Corporation
 * Copyright (c) 2026-present Eclipse ThreadX contributors
 *
 * 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"

/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _gx_display_driver_generic_circle_draw              PORTABLE C      */
/*                                                           6.1          */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Kenneth Maxwell, Microsoft Corporation                              */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    Display driver to draw circle arc.                                  */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    context                               Drawing context               */
/*    xcenter                               x-coord of center of circle   */
/*    ycenter                               y-coord of center of circle   */
/*    r                                     Radius of circle              */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    None                                                                */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    [gx_display_driver_pixel_blend]       Basic display driver pixel    */
/*                                            blend function              */
/*    _gx_display_driver_arc_clipping_get                                 */
/*                                          Get the clipping rectangles   */
/*                                            of the circle arc           */
/*    _gx_utility_rectangle_point_detect    Detect whether a pixel is     */
/*                                            inside rectangle            */
/*    [gx_display_driver_pixel_write]       Basic display driver pixel    */
/*                                            write function              */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    GUIX Internal Code                                                  */
/*                                                                        */
/**************************************************************************/
#if defined(GX_ARC_DRAWING_SUPPORT)
VOID _gx_display_driver_generic_arc_draw(GX_DRAW_CONTEXT *context, INT xcenter, INT ycenter, UINT r, INT start_angle, INT end_angle)
{
/* The arc draw function is implemented by clipping a circle.
   Calculate the arc clipping first, turn on the pixel on circle when the pixel
   is inside the arc clipping area.                                             */

GX_RECTANGLE clip[4];
INT          x, y;
INT          d;
GX_POINT     point;
INT          sign[4][2] = {{1, 1}, {-1, 1}, {1, -1}, {-1, -1}};
INT          index;
GX_DISPLAY  *display = context -> gx_draw_context_display;
GX_BRUSH    *brush = &context -> gx_draw_context_brush;

#if defined(GX_BRUSH_ALPHA_SUPPORT)
GX_UBYTE     brush_alpha = brush -> gx_brush_alpha;

    if (display -> gx_display_driver_pixel_blend == GX_NULL)
    {
        /* Pixel blend function is null means alpha isn't supported in this driver.
        So set alpha value to 0xff to make it draw the original color in case GX_BRUSH_ALPHA_SUPPORT is defined. */
        brush_alpha = 0xff;
    }
    else
    {
        if (brush_alpha == 0)
        /* Nothing to draw here. */
        return;
    }
#endif

    /* Get the clipping rectangles of the circle arc. */
    _gx_display_driver_arc_clipping_get(xcenter, ycenter, r, start_angle, end_angle, &clip[0], &clip[1], &clip[2], &clip[3]);

    _gx_utility_rectangle_overlap_detect(context -> gx_draw_context_clip, &clip[0], &clip[0]);
    _gx_utility_rectangle_overlap_detect(context -> gx_draw_context_clip, &clip[1], &clip[1]);
    _gx_utility_rectangle_overlap_detect(context -> gx_draw_context_clip, &clip[2], &clip[2]);
    _gx_utility_rectangle_overlap_detect(context -> gx_draw_context_clip, &clip[3], &clip[3]);

    x = 0;
    y = (INT)r;
    d = (INT)(5 - 4 * r);

#if defined (GX_BRUSH_ALPHA_SUPPORT)
    if (brush_alpha != 0xff)
    {
        while (x <= y)
        {
            for (index = 0; index < 4; index++)
            {
                point.gx_point_x = (GX_VALUE)(x * sign[index][0] + xcenter);
                point.gx_point_y = (GX_VALUE)(y * sign[index][1] + ycenter);

                if ((_gx_utility_rectangle_point_detect(&clip[0], point)) ||
                    (_gx_utility_rectangle_point_detect(&clip[1], point)) ||
                    (_gx_utility_rectangle_point_detect(&clip[2], point)) ||
                    (_gx_utility_rectangle_point_detect(&clip[3], point)))
                {
                    display -> gx_display_driver_pixel_blend(context, point.gx_point_x, point.gx_point_y, brush -> gx_brush_line_color, brush_alpha);
                }

                point.gx_point_x = (GX_VALUE)(y * sign[index][0] + xcenter);
                point.gx_point_y = (GX_VALUE)(x * sign[index][1] + ycenter);

                if ((_gx_utility_rectangle_point_detect(&clip[0], point)) ||
                    (_gx_utility_rectangle_point_detect(&clip[1], point)) ||
                    (_gx_utility_rectangle_point_detect(&clip[2], point)) ||
                    (_gx_utility_rectangle_point_detect(&clip[3], point)))
                {
                    display -> gx_display_driver_pixel_blend(context, point.gx_point_x, point.gx_point_y, brush -> gx_brush_line_color, brush_alpha);
                }
            }

            if (d < 0)
            {
                d += 8 * x + 12;
            }
            else
            {
                d += 8 * (x - y) + 20;
                y--;
            }
            x++;
        }
    }
    else
    {
#endif
        while (x <= y)
        {
            for (index = 0; index < 4; index++)
            {
                point.gx_point_x = (GX_VALUE)(x * sign[index][0] + xcenter);
                point.gx_point_y = (GX_VALUE)(y * sign[index][1] + ycenter);

                if ((_gx_utility_rectangle_point_detect(&clip[0], point)) ||
                    (_gx_utility_rectangle_point_detect(&clip[1], point)) ||
                    (_gx_utility_rectangle_point_detect(&clip[2], point)) ||
                    (_gx_utility_rectangle_point_detect(&clip[3], point)))
                {
                    display -> gx_display_driver_pixel_write(context, point.gx_point_x, point.gx_point_y, brush -> gx_brush_line_color);
                }

                point.gx_point_x = (GX_VALUE)(y * sign[index][0] + xcenter);
                point.gx_point_y = (GX_VALUE)(x * sign[index][1] + ycenter);

                if ((_gx_utility_rectangle_point_detect(&clip[0], point)) ||
                    (_gx_utility_rectangle_point_detect(&clip[1], point)) ||
                    (_gx_utility_rectangle_point_detect(&clip[2], point)) ||
                    (_gx_utility_rectangle_point_detect(&clip[3], point)))
                {
                    display -> gx_display_driver_pixel_write(context, point.gx_point_x, point.gx_point_y, brush -> gx_brush_line_color);
                }
            }

            if (d < 0)
            {
                d += 8 * x + 12;
            }
            else
            {
                d += 8 * (x - y) + 20;
                y--;
            }
            x++;
        }
#if defined (GX_BRUSH_ALPHA_SUPPORT)
    }
#endif
}
#endif



Generated by: GCOVR (Version 4.1)

Line	Branch	Exec	Source
1			/***************************************************************************
2			* Copyright (c) 2024 Microsoft Corporation
3			* Copyright (c) 2026-present Eclipse ThreadX contributors
4			*
5			* This program and the accompanying materials are made available under the
6			* terms of the MIT License which is available at
7			* https://opensource.org/licenses/MIT.
8			*
9			* SPDX-License-Identifier: MIT
10			**************************************************************************/
11
12
13			/**************************************************************************/
14			/**************************************************************************/
15			/** */
16			/** GUIX Component */
17			/** */
18			/** Display Management (Display) */
19			/** */
20			/**************************************************************************/
21
22			#define GX_SOURCE_CODE
23
24
25			/* Include necessary system files. */
26
27			#include "gx_api.h"
28			#include "gx_system.h"
29			#include "gx_utility.h"
30			#include "gx_display.h"
31
32			/**************************************************************************/
33			/* */
34			/* FUNCTION RELEASE */
35			/* */
36			/* _gx_display_driver_generic_circle_draw PORTABLE C */
37			/* 6.1 */
38			/* AUTHOR */
39			/* */
40			/* Kenneth Maxwell, Microsoft Corporation */
41			/* */
42			/* DESCRIPTION */
43			/* */
44			/* Display driver to draw circle arc. */
45			/* */
46			/* INPUT */
47			/* */
48			/* context Drawing context */
49			/* xcenter x-coord of center of circle */
50			/* ycenter y-coord of center of circle */
51			/* r Radius of circle */
52			/* */
53			/* OUTPUT */
54			/* */
55			/* None */
56			/* */
57			/* CALLS */
58			/* */
59			/* [gx_display_driver_pixel_blend] Basic display driver pixel */
60			/* blend function */
61			/* _gx_display_driver_arc_clipping_get */
62			/* Get the clipping rectangles */
63			/* of the circle arc */
64			/* _gx_utility_rectangle_point_detect Detect whether a pixel is */
65			/* inside rectangle */
66			/* [gx_display_driver_pixel_write] Basic display driver pixel */
67			/* write function */
68			/* */
69			/* CALLED BY */
70			/* */
71			/* GUIX Internal Code */
72			/* */
73			/**************************************************************************/
74			#if defined(GX_ARC_DRAWING_SUPPORT)
75		478	VOID _gx_display_driver_generic_arc_draw(GX_DRAW_CONTEXT *context, INT xcenter, INT ycenter, UINT r, INT start_angle, INT end_angle)
76			{
77			/* The arc draw function is implemented by clipping a circle.
78			Calculate the arc clipping first, turn on the pixel on circle when the pixel
79			is inside the arc clipping area. */
80
81			GX_RECTANGLE clip[4];
82			INT x, y;
83			INT d;
84			GX_POINT point;
85		478	INT sign[4][2] = {{1, 1}, {-1, 1}, {1, -1}, {-1, -1}};
86			INT index;
87		478	GX_DISPLAY *display = context -> gx_draw_context_display;
88		478	GX_BRUSH *brush = &context -> gx_draw_context_brush;
89
90			#if defined(GX_BRUSH_ALPHA_SUPPORT)
91		478	GX_UBYTE brush_alpha = brush -> gx_brush_alpha;
92
93	✓✓	478	if (display -> gx_display_driver_pixel_blend == GX_NULL)
94			{
95			/* Pixel blend function is null means alpha isn't supported in this driver.
96			So set alpha value to 0xff to make it draw the original color in case GX_BRUSH_ALPHA_SUPPORT is defined. */
97		413	brush_alpha = 0xff;
98			}
99			else
100			{
101	✓✓	65	if (brush_alpha == 0)
102			/* Nothing to draw here. */
103		8	return;
104			}
105			#endif
106
107			/* Get the clipping rectangles of the circle arc. */
108		470	_gx_display_driver_arc_clipping_get(xcenter, ycenter, r, start_angle, end_angle, &clip[0], &clip[1], &clip[2], &clip[3]);
109
110		470	_gx_utility_rectangle_overlap_detect(context -> gx_draw_context_clip, &clip[0], &clip[0]);
111		470	_gx_utility_rectangle_overlap_detect(context -> gx_draw_context_clip, &clip[1], &clip[1]);
112		470	_gx_utility_rectangle_overlap_detect(context -> gx_draw_context_clip, &clip[2], &clip[2]);
113		470	_gx_utility_rectangle_overlap_detect(context -> gx_draw_context_clip, &clip[3], &clip[3]);
114
115		470	x = 0;
116		470	y = (INT)r;
117		470	d = (INT)(5 - 4 * r);
118
119			#if defined (GX_BRUSH_ALPHA_SUPPORT)
120	✓✓	470	if (brush_alpha != 0xff)
121			{
122	✓✓	3178	while (x <= y)
123			{
124	✓✓	15780	for (index = 0; index < 4; index++)
125			{
126		12624	point.gx_point_x = (GX_VALUE)(x * sign[index][0] + xcenter);
127		12624	point.gx_point_y = (GX_VALUE)(y * sign[index][1] + ycenter);
128
129	✓✓✓✓	25011	if ((_gx_utility_rectangle_point_detect(&clip[0], point)) \|\|
130	✓✓	24546	(_gx_utility_rectangle_point_detect(&clip[1], point)) \|\|
131	✓✓	24185	(_gx_utility_rectangle_point_detect(&clip[2], point)) \|\|
132		12026	(_gx_utility_rectangle_point_detect(&clip[3], point)))
133			{
134		697	display -> gx_display_driver_pixel_blend(context, point.gx_point_x, point.gx_point_y, brush -> gx_brush_line_color, brush_alpha);
135			}
136
137		12624	point.gx_point_x = (GX_VALUE)(y * sign[index][0] + xcenter);
138		12624	point.gx_point_y = (GX_VALUE)(x * sign[index][1] + ycenter);
139
140	✓✓✓✓	24975	if ((_gx_utility_rectangle_point_detect(&clip[0], point)) \|\|
141	✓✓	24506	(_gx_utility_rectangle_point_detect(&clip[1], point)) \|\|
142	✓✓	24215	(_gx_utility_rectangle_point_detect(&clip[2], point)) \|\|
143		12060	(_gx_utility_rectangle_point_detect(&clip[3], point)))
144			{
145		601	display -> gx_display_driver_pixel_blend(context, point.gx_point_x, point.gx_point_y, brush -> gx_brush_line_color, brush_alpha);
146			}
147			}
148
149	✓✓	3156	if (d < 0)
150			{
151		1834	d += 8 * x + 12;
152			}
153			else
154			{
155		1322	d += 8 * (x - y) + 20;
156		1322	y--;
157			}
158		3156	x++;
159			}
160			}
161			else
162			{
163			#endif
164	✓✓	37356	while (x <= y)
165			{
166	✓✓	184540	for (index = 0; index < 4; index++)
167			{
168		147632	point.gx_point_x = (GX_VALUE)(x * sign[index][0] + xcenter);
169		147632	point.gx_point_y = (GX_VALUE)(y * sign[index][1] + ycenter);
170
171	✓✓✓✓	280308	if ((_gx_utility_rectangle_point_detect(&clip[0], point)) \|\|
172	✓✓	253685	(_gx_utility_rectangle_point_detect(&clip[1], point)) \|\|
173	✓✓	241019	(_gx_utility_rectangle_point_detect(&clip[2], point)) \|\|
174		120010	(_gx_utility_rectangle_point_detect(&clip[3], point)))
175			{
176		27830	display -> gx_display_driver_pixel_write(context, point.gx_point_x, point.gx_point_y, brush -> gx_brush_line_color);
177			}
178
179		147632	point.gx_point_x = (GX_VALUE)(y * sign[index][0] + xcenter);
180		147632	point.gx_point_y = (GX_VALUE)(x * sign[index][1] + ycenter);
181
182	✓✓✓✓	284036	if ((_gx_utility_rectangle_point_detect(&clip[0], point)) \|\|
183	✓✓	265257	(_gx_utility_rectangle_point_detect(&clip[1], point)) \|\|
184	✓✓	256943	(_gx_utility_rectangle_point_detect(&clip[2], point)) \|\|
185		128090	(_gx_utility_rectangle_point_detect(&clip[3], point)))
186			{
187		19795	display -> gx_display_driver_pixel_write(context, point.gx_point_x, point.gx_point_y, brush -> gx_brush_line_color);
188			}
189			}
190
191	✓✓	36908	if (d < 0)
192			{
193		21334	d += 8 * x + 12;
194			}
195			else
196			{
197		15574	d += 8 * (x - y) + 20;
198		15574	y--;
199			}
200		36908	x++;
201			}
202			#if defined (GX_BRUSH_ALPHA_SUPPORT)
203			}
204			#endif
205			}
206			#endif
207