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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	gx_display_driver_generic_circle_draw.c	Lines:	44	44	100.0 %
Date:	2025-09-29 22:21:50	Branches:	26	26	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"


/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _gx_display_driver_generic_circle_draw              PORTABLE C      */
/*                                                           6.1          */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Kenneth Maxwell, Microsoft Corporation                              */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    Display driver to draw circle.                                      */
/*                                                                        */
/*  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_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                                                  */
/*                                                                        */
/*  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)

VOID _gx_display_driver_generic_circle_draw(GX_DRAW_CONTEXT *context, INT xcenter, INT ycenter, UINT r)
{
    /* The circle draw function is implemented from midpoint circle algorithm. */
INT           x;
INT           y;
INT           d;
GX_POINT      point;
INT           sign[4][2] = { {1, 1}, {-1, 1}, {1, -1}, {-1, -1} };
INT           index;

GX_RECTANGLE *clip = context -> gx_draw_context_clip;
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

    x = 0;
    y = (INT)r;
    d = 5 - (INT)(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, 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, 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, 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, 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			*
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
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. */
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_utility_rectangle_point_detect Detect whether a pixel is */
62			/* inside rectangle */
63			/* [gx_display_driver_pixel_write] Basic display driver pixel */
64			/* write function */
65			/* */
66			/* CALLED BY */
67			/* */
68			/* GUIX Internal Code */
69			/* */
70			/* RELEASE HISTORY */
71			/* */
72			/* DATE NAME DESCRIPTION */
73			/* */
74			/* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
75			/* 09-30-2020 Kenneth Maxwell Modified comment(s), */
76			/* resulting in version 6.1 */
77			/* */
78			/**************************************************************************/
79			#if defined(GX_ARC_DRAWING_SUPPORT)
80
81		387	VOID _gx_display_driver_generic_circle_draw(GX_DRAW_CONTEXT *context, INT xcenter, INT ycenter, UINT r)
82			{
83			/* The circle draw function is implemented from midpoint circle algorithm. */
84			INT x;
85			INT y;
86			INT d;
87			GX_POINT point;
88		387	INT sign[4][2] = { {1, 1}, {-1, 1}, {1, -1}, {-1, -1} };
89			INT index;
90
91		387	GX_RECTANGLE *clip = context -> gx_draw_context_clip;
92		387	GX_DISPLAY *display = context -> gx_draw_context_display;
93		387	GX_BRUSH *brush = &context -> gx_draw_context_brush;
94
95			#if defined(GX_BRUSH_ALPHA_SUPPORT)
96		387	GX_UBYTE brush_alpha = brush -> gx_brush_alpha;
97
98	✓✓	387	if (display -> gx_display_driver_pixel_blend == GX_NULL)
99			{
100			/* Pixel blend function is null means alpha isn't supported in this driver.
101			So set alpha value to 0xff to make it draw the original color in case GX_BRUSH_ALPHA_SUPPORT is defined. */
102		52	brush_alpha = 0xff;
103			}
104			else
105			{
106	✓✓	335	if (brush_alpha == 0)
107			{
108			/* Nothing to draw here. */
109		96	return;
110			}
111			}
112			#endif
113
114		291	x = 0;
115		291	y = (INT)r;
116		291	d = 5 - (INT)(4 * r);
117			#if defined (GX_BRUSH_ALPHA_SUPPORT)
118	✓✓	291	if (brush_alpha != 0xff)
119			{
120	✓✓	10188	while (x <= y)
121			{
122	✓✓	50400	for (index = 0; index < 4; index++)
123			{
124		40320	point.gx_point_x = (GX_VALUE)(x * sign[index][0] + xcenter);
125		40320	point.gx_point_y = (GX_VALUE)(y * sign[index][1] + ycenter);
126
127	✓✓	40320	if (_gx_utility_rectangle_point_detect(clip, point))
128			{
129		31776	display -> gx_display_driver_pixel_blend(context, point.gx_point_x, point.gx_point_y, brush -> gx_brush_line_color, brush_alpha);
130			}
131
132		40320	point.gx_point_x = (GX_VALUE)(y * sign[index][0] + xcenter);
133		40320	point.gx_point_y = (GX_VALUE)(x * sign[index][1] + ycenter);
134
135	✓✓	40320	if (_gx_utility_rectangle_point_detect(clip, point))
136			{
137		23040	display -> gx_display_driver_pixel_blend(context, point.gx_point_x, point.gx_point_y, brush -> gx_brush_line_color, brush_alpha);
138			}
139			}
140
141	✓✓	10080	if (d < 0)
142			{
143		5856	d += 8 * x + 12;
144			}
145			else
146			{
147		4224	d += 8 * (x - y) + 20;
148		4224	y--;
149			}
150		10080	x++;
151			}
152			}
153			else
154			{
155			#endif
156	✓✓	16838	while (x <= y)
157			{
158	✓✓	83275	for (index = 0; index < 4; index++)
159			{
160		66620	point.gx_point_x = (GX_VALUE)(x * sign[index][0] + xcenter);
161		66620	point.gx_point_y = (GX_VALUE)(y * sign[index][1] + ycenter);
162
163	✓✓	66620	if (_gx_utility_rectangle_point_detect(clip, point))
164			{
165		56024	display -> gx_display_driver_pixel_write(context, point.gx_point_x, point.gx_point_y, brush -> gx_brush_line_color);
166			}
167
168		66620	point.gx_point_x = (GX_VALUE)(y * sign[index][0] + xcenter);
169		66620	point.gx_point_y = (GX_VALUE)(x * sign[index][1] + ycenter);
170
171	✓✓	66620	if (_gx_utility_rectangle_point_detect(clip, point))
172			{
173		47074	display -> gx_display_driver_pixel_write(context, point.gx_point_x, point.gx_point_y, brush -> gx_brush_line_color);
174			}
175			}
176
177	✓✓	16655	if (d < 0)
178			{
179		9657	d += 8 * x + 12;
180			}
181			else
182			{
183		6998	d += 8 * (x - y) + 20;
184		6998	y--;
185			}
186		16655	x++;
187			}
188			#if defined (GX_BRUSH_ALPHA_SUPPORT)
189			}
190			#endif
191			}
192
193			#endif
194