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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	gx_display_driver_generic_filled_circle_draw.c	Lines:	68	68	100.0 %
Date:	2026-03-06 19:21:09	Branches:	44	44	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_display.h"


/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _gx_display_driver_generic_filled_circle_draw       PORTABLE C      */
/*                                                           6.1          */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Kenneth Maxwell, Microsoft Corporation                              */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    Display driver to draw filled circals.                              */
/*                                                                        */
/*  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_horizontal_line_draw]                            */
/*                                          Driver-level horizontal line  */
/*                                            draw function               */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    _gx_display_driver_generic_simple_wide_line_draw                    */
/*                                                                        */
/**************************************************************************/
VOID _gx_display_driver_generic_filled_circle_draw(GX_DRAW_CONTEXT *context, GX_FIXED_VAL xcenter, GX_FIXED_VAL ycenter, GX_FIXED_VAL r)
{
/* The circle draw function is implemented from midpoint circle algorithm. */

GX_DISPLAY   *display;
GX_RECTANGLE *clip;
GX_BRUSH     *brush;
INT           x;
INT           y;
GX_BYTE       ysign[2] = {1, -1};
INT           index;
INT           yi;
GX_VALUE      xstart;
GX_VALUE      xend;
GX_FIXED_VAL  xfraction;
GX_FIXED_VAL  yfraction;
INT           decision;
INT           half_shift;

    display = context -> gx_draw_context_display;
    clip = context -> gx_draw_context_clip;
    brush = &context -> gx_draw_context_brush;

    xfraction = (xcenter & GX_FIXED_VAL_FRACTION_MASK);
    yfraction = (ycenter & GX_FIXED_VAL_FRACTION_MASK);

    r -= GX_FIXED_VAL_HALF;

    if (xfraction)
    {
        x = GX_FIXED_VAL_ONE - xfraction;
    }
    else
    {
        x = 0;
    }
    y = GX_FIXED_VAL_RND_UP(r + yfraction);
    y = GX_FIXED_VAL_MAKE(y) - yfraction;

    half_shift = GX_FIXED_VAL_SHIFT >> 1;

    if ((x == 0) && (y == r))
    {
        decision = 256 - r;
    }
    else
    {
        decision = (x >> half_shift) * (x >> half_shift);
        decision += ((y - GX_FIXED_VAL_HALF) >> half_shift) * ((y - GX_FIXED_VAL_HALF) >> half_shift);
        decision -= ((r >> half_shift) * (r >> half_shift));
    }

    while (1)
    {
        if (decision < 0)
        {
            decision += 2 * x + GX_FIXED_VAL_ONE;
        }
        else
        {
            decision += 2 * (x - y) + GX_FIXED_VAL_MAKE(3);
            y -= GX_FIXED_VAL_ONE;
        }

        if (x > y)
        {
            break;
        }

        for (index = 0; index < 2; index++)
        {
            xstart = (GX_VALUE)GX_FIXED_VAL_TO_INT(xcenter - x);
            xend = (GX_VALUE)GX_FIXED_VAL_TO_INT(xcenter + x);
            yi = (GX_VALUE)GX_FIXED_VAL_TO_INT(ycenter + y * ysign[index]);

            if (xstart < clip -> gx_rectangle_left)
            {
                xstart = clip -> gx_rectangle_left;
            }

            if (xend > clip -> gx_rectangle_right)
            {
                xend = clip -> gx_rectangle_right;
            }

            if (xstart <= xend &&
                yi >= clip -> gx_rectangle_top &&
                yi <= clip -> gx_rectangle_bottom)
            {
                display -> gx_display_driver_horizontal_line_draw(context, xstart, xend, yi, 1, brush -> gx_brush_line_color);
            }
        }

        x += GX_FIXED_VAL_ONE;
    }

    x = GX_FIXED_VAL_RND_UP(r + xfraction);
    x = GX_FIXED_VAL_MAKE(x) - xfraction;

    if (yfraction)
    {
        y = yfraction;
    }
    else
    {
        y = 0;
    }

    if ((y == 0) && (x == r))
    {
        decision = 256 - r;
    }
    else
    {
        decision = (((x - GX_FIXED_VAL_HALF) >> half_shift) * ((x - GX_FIXED_VAL_HALF) >> half_shift));
        decision += ((y >> half_shift) * (y >> half_shift));
        decision -=  ((r >> half_shift) * (r >> half_shift));
    }

    while (1)
    {
        if (decision < 0)
        {
            decision += 2 * y + GX_FIXED_VAL_ONE;
        }
        else
        {
            decision += 2 * (y - x) + GX_FIXED_VAL_MAKE(3);
            x -= GX_FIXED_VAL_ONE;
        }

        if (x <= y)
        {
            break;
        }

        for (index = 0; index < 2; index++)
        {
            xstart = (GX_VALUE)GX_FIXED_VAL_TO_INT(xcenter - x);
            xend  = (GX_VALUE)GX_FIXED_VAL_TO_INT(xcenter + x);
            yi = (GX_VALUE)GX_FIXED_VAL_TO_INT(ycenter + y * ysign[index]);

            if (xstart < clip -> gx_rectangle_left)
            {
                xstart = clip -> gx_rectangle_left;
            }

            if (xend > clip -> gx_rectangle_right)
            {
                xend = clip -> gx_rectangle_right;
            }

            if (xstart <= xend &&
                yi >= clip -> gx_rectangle_top &&
                yi <= clip -> gx_rectangle_bottom)
            {
                display -> gx_display_driver_horizontal_line_draw(context, xstart, xend, yi, 1, brush -> gx_brush_line_color);
            }
        }

        y += GX_FIXED_VAL_ONE;
    }
}



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_display.h"
29
30
31			/**************************************************************************/
32			/* */
33			/* FUNCTION RELEASE */
34			/* */
35			/* _gx_display_driver_generic_filled_circle_draw PORTABLE C */
36			/* 6.1 */
37			/* AUTHOR */
38			/* */
39			/* Kenneth Maxwell, Microsoft Corporation */
40			/* */
41			/* DESCRIPTION */
42			/* */
43			/* Display driver to draw filled circals. */
44			/* */
45			/* INPUT */
46			/* */
47			/* context Drawing context */
48			/* xcenter x-coord of center of circle */
49			/* ycenter y-coord of center of circle */
50			/* r Radius of circle */
51			/* */
52			/* OUTPUT */
53			/* */
54			/* None */
55			/* */
56			/* CALLS */
57			/* */
58			/* [gx_display_driver_horizontal_line_draw] */
59			/* Driver-level horizontal line */
60			/* draw function */
61			/* */
62			/* CALLED BY */
63			/* */
64			/* _gx_display_driver_generic_simple_wide_line_draw */
65			/* */
66			/**************************************************************************/
67		7336	VOID _gx_display_driver_generic_filled_circle_draw(GX_DRAW_CONTEXT *context, GX_FIXED_VAL xcenter, GX_FIXED_VAL ycenter, GX_FIXED_VAL r)
68			{
69			/* The circle draw function is implemented from midpoint circle algorithm. */
70
71			GX_DISPLAY *display;
72			GX_RECTANGLE *clip;
73			GX_BRUSH *brush;
74			INT x;
75			INT y;
76		7336	GX_BYTE ysign[2] = {1, -1};
77			INT index;
78			INT yi;
79			GX_VALUE xstart;
80			GX_VALUE xend;
81			GX_FIXED_VAL xfraction;
82			GX_FIXED_VAL yfraction;
83			INT decision;
84			INT half_shift;
85
86		7336	display = context -> gx_draw_context_display;
87		7336	clip = context -> gx_draw_context_clip;
88		7336	brush = &context -> gx_draw_context_brush;
89
90		7336	xfraction = (xcenter & GX_FIXED_VAL_FRACTION_MASK);
91		7336	yfraction = (ycenter & GX_FIXED_VAL_FRACTION_MASK);
92
93		7336	r -= GX_FIXED_VAL_HALF;
94
95	✓✓	7336	if (xfraction)
96			{
97		929	x = GX_FIXED_VAL_ONE - xfraction;
98			}
99			else
100			{
101		6407	x = 0;
102			}
103		7336	y = GX_FIXED_VAL_RND_UP(r + yfraction);
104		7336	y = GX_FIXED_VAL_MAKE(y) - yfraction;
105
106		7336	half_shift = GX_FIXED_VAL_SHIFT >> 1;
107
108	✓✓✓✓	7336	if ((x == 0) && (y == r))
109			{
110		4895	decision = 256 - r;
111			}
112			else
113			{
114		2441	decision = (x >> half_shift) * (x >> half_shift);
115		2441	decision += ((y - GX_FIXED_VAL_HALF) >> half_shift) * ((y - GX_FIXED_VAL_HALF) >> half_shift);
116		2441	decision -= ((r >> half_shift) * (r >> half_shift));
117			}
118
119			while (1)
120			{
121	✓✓	34476	if (decision < 0)
122			{
123		17948	decision += 2 * x + GX_FIXED_VAL_ONE;
124			}
125			else
126			{
127		16528	decision += 2 * (x - y) + GX_FIXED_VAL_MAKE(3);
128		16528	y -= GX_FIXED_VAL_ONE;
129			}
130
131	✓✓	34476	if (x > y)
132			{
133		7336	break;
134			}
135
136	✓✓	81420	for (index = 0; index < 2; index++)
137			{
138		54280	xstart = (GX_VALUE)GX_FIXED_VAL_TO_INT(xcenter - x);
139		54280	xend = (GX_VALUE)GX_FIXED_VAL_TO_INT(xcenter + x);
140		54280	yi = (GX_VALUE)GX_FIXED_VAL_TO_INT(ycenter + y * ysign[index]);
141
142	✓✓	54280	if (xstart < clip -> gx_rectangle_left)
143			{
144		1068	xstart = clip -> gx_rectangle_left;
145			}
146
147	✓✓	54280	if (xend > clip -> gx_rectangle_right)
148			{
149		4488	xend = clip -> gx_rectangle_right;
150			}
151
152	✓✓	54280	if (xstart <= xend &&
153	✓✓	49968	yi >= clip -> gx_rectangle_top &&
154	✓✓	49572	yi <= clip -> gx_rectangle_bottom)
155			{
156		48236	display -> gx_display_driver_horizontal_line_draw(context, xstart, xend, yi, 1, brush -> gx_brush_line_color);
157			}
158			}
159
160		27140	x += GX_FIXED_VAL_ONE;
161			}
162
163		7336	x = GX_FIXED_VAL_RND_UP(r + xfraction);
164		7336	x = GX_FIXED_VAL_MAKE(x) - xfraction;
165
166	✓✓	7336	if (yfraction)
167			{
168		1123	y = yfraction;
169			}
170			else
171			{
172		6213	y = 0;
173			}
174
175	✓✓✓✓	7336	if ((y == 0) && (x == r))
176			{
177		4711	decision = 256 - r;
178			}
179			else
180			{
181		2625	decision = (((x - GX_FIXED_VAL_HALF) >> half_shift) * ((x - GX_FIXED_VAL_HALF) >> half_shift));
182		2625	decision += ((y >> half_shift) * (y >> half_shift));
183		2625	decision -= ((r >> half_shift) * (r >> half_shift));
184			}
185
186			while (1)
187			{
188	✓✓	30733	if (decision < 0)
189			{
190		17764	decision += 2 * y + GX_FIXED_VAL_ONE;
191			}
192			else
193			{
194		12969	decision += 2 * (y - x) + GX_FIXED_VAL_MAKE(3);
195		12969	x -= GX_FIXED_VAL_ONE;
196			}
197
198	✓✓	30733	if (x <= y)
199			{
200		7336	break;
201			}
202
203	✓✓	70191	for (index = 0; index < 2; index++)
204			{
205		46794	xstart = (GX_VALUE)GX_FIXED_VAL_TO_INT(xcenter - x);
206		46794	xend = (GX_VALUE)GX_FIXED_VAL_TO_INT(xcenter + x);
207		46794	yi = (GX_VALUE)GX_FIXED_VAL_TO_INT(ycenter + y * ysign[index]);
208
209	✓✓	46794	if (xstart < clip -> gx_rectangle_left)
210			{
211		1132	xstart = clip -> gx_rectangle_left;
212			}
213
214	✓✓	46794	if (xend > clip -> gx_rectangle_right)
215			{
216		4032	xend = clip -> gx_rectangle_right;
217			}
218
219	✓✓	46794	if (xstart <= xend &&
220	✓✓	43902	yi >= clip -> gx_rectangle_top &&
221	✓✓	43602	yi <= clip -> gx_rectangle_bottom)
222			{
223		42738	display -> gx_display_driver_horizontal_line_draw(context, xstart, xend, yi, 1, brush -> gx_brush_line_color);
224			}
225			}
226
227		23397	y += GX_FIXED_VAL_ONE;
228			}
229		7336	}
230