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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:	2024-12-05 08:52:37	Branches:	50	50	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 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                                                  */
/*                                                                        */
/*  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_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			*
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			/* FUNCTION RELEASE */
34			/* */
35			/* _gx_display_driver_generic_circle_draw PORTABLE C */
36			/* 6.1 */
37			/* AUTHOR */
38			/* */
39			/* Kenneth Maxwell, Microsoft Corporation */
40			/* */
41			/* DESCRIPTION */
42			/* */
43			/* Display driver to draw circle arc. */
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_pixel_blend] Basic display driver pixel */
59			/* blend function */
60			/* _gx_display_driver_arc_clipping_get */
61			/* Get the clipping rectangles */
62			/* of the circle arc */
63			/* _gx_utility_rectangle_point_detect Detect whether a pixel is */
64			/* inside rectangle */
65			/* [gx_display_driver_pixel_write] Basic display driver pixel */
66			/* write function */
67			/* */
68			/* CALLED BY */
69			/* */
70			/* GUIX Internal Code */
71			/* */
72			/* RELEASE HISTORY */
73			/* */
74			/* DATE NAME DESCRIPTION */
75			/* */
76			/* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
77			/* 09-30-2020 Kenneth Maxwell Modified comment(s), */
78			/* resulting in version 6.1 */
79			/* */
80			/**************************************************************************/
81			#if defined(GX_ARC_DRAWING_SUPPORT)
82		478	VOID _gx_display_driver_generic_arc_draw(GX_DRAW_CONTEXT *context, INT xcenter, INT ycenter, UINT r, INT start_angle, INT end_angle)
83			{
84			/* The arc draw function is implemented by clipping a circle.
85			Calculate the arc clipping first, turn on the pixel on circle when the pixel
86			is inside the arc clipping area. */
87
88			GX_RECTANGLE clip[4];
89			INT x, y;
90			INT d;
91			GX_POINT point;
92		478	INT sign[4][2] = {{1, 1}, {-1, 1}, {1, -1}, {-1, -1}};
93			INT index;
94		478	GX_DISPLAY *display = context -> gx_draw_context_display;
95		478	GX_BRUSH *brush = &context -> gx_draw_context_brush;
96
97			#if defined(GX_BRUSH_ALPHA_SUPPORT)
98		478	GX_UBYTE brush_alpha = brush -> gx_brush_alpha;
99
100	✓✓	478	if (display -> gx_display_driver_pixel_blend == GX_NULL)
101			{
102			/* Pixel blend function is null means alpha isn't supported in this driver.
103			So set alpha value to 0xff to make it draw the original color in case GX_BRUSH_ALPHA_SUPPORT is defined. */
104		413	brush_alpha = 0xff;
105			}
106			else
107			{
108	✓✓	65	if (brush_alpha == 0)
109			/* Nothing to draw here. */
110		8	return;
111			}
112			#endif
113
114			/* Get the clipping rectangles of the circle arc. */
115		470	_gx_display_driver_arc_clipping_get(xcenter, ycenter, r, start_angle, end_angle, &clip[0], &clip[1], &clip[2], &clip[3]);
116
117		470	_gx_utility_rectangle_overlap_detect(context -> gx_draw_context_clip, &clip[0], &clip[0]);
118		470	_gx_utility_rectangle_overlap_detect(context -> gx_draw_context_clip, &clip[1], &clip[1]);
119		470	_gx_utility_rectangle_overlap_detect(context -> gx_draw_context_clip, &clip[2], &clip[2]);
120		470	_gx_utility_rectangle_overlap_detect(context -> gx_draw_context_clip, &clip[3], &clip[3]);
121
122		470	x = 0;
123		470	y = (INT)r;
124		470	d = (INT)(5 - 4 * r);
125
126			#if defined (GX_BRUSH_ALPHA_SUPPORT)
127	✓✓	470	if (brush_alpha != 0xff)
128			{
129	✓✓	3178	while (x <= y)
130			{
131	✓✓	15780	for (index = 0; index < 4; index++)
132			{
133		12624	point.gx_point_x = (GX_VALUE)(x * sign[index][0] + xcenter);
134		12624	point.gx_point_y = (GX_VALUE)(y * sign[index][1] + ycenter);
135
136	✓✓✓✓	25011	if ((_gx_utility_rectangle_point_detect(&clip[0], point)) \|\|
137	✓✓	24546	(_gx_utility_rectangle_point_detect(&clip[1], point)) \|\|
138	✓✓	24185	(_gx_utility_rectangle_point_detect(&clip[2], point)) \|\|
139		12026	(_gx_utility_rectangle_point_detect(&clip[3], point)))
140			{
141		697	display -> gx_display_driver_pixel_blend(context, point.gx_point_x, point.gx_point_y, brush -> gx_brush_line_color, brush_alpha);
142			}
143
144		12624	point.gx_point_x = (GX_VALUE)(y * sign[index][0] + xcenter);
145		12624	point.gx_point_y = (GX_VALUE)(x * sign[index][1] + ycenter);
146
147	✓✓✓✓	24975	if ((_gx_utility_rectangle_point_detect(&clip[0], point)) \|\|
148	✓✓	24506	(_gx_utility_rectangle_point_detect(&clip[1], point)) \|\|
149	✓✓	24215	(_gx_utility_rectangle_point_detect(&clip[2], point)) \|\|
150		12060	(_gx_utility_rectangle_point_detect(&clip[3], point)))
151			{
152		601	display -> gx_display_driver_pixel_blend(context, point.gx_point_x, point.gx_point_y, brush -> gx_brush_line_color, brush_alpha);
153			}
154			}
155
156	✓✓	3156	if (d < 0)
157			{
158		1834	d += 8 * x + 12;
159			}
160			else
161			{
162		1322	d += 8 * (x - y) + 20;
163		1322	y--;
164			}
165		3156	x++;
166			}
167			}
168			else
169			{
170			#endif
171	✓✓	37356	while (x <= y)
172			{
173	✓✓	184540	for (index = 0; index < 4; index++)
174			{
175		147632	point.gx_point_x = (GX_VALUE)(x * sign[index][0] + xcenter);
176		147632	point.gx_point_y = (GX_VALUE)(y * sign[index][1] + ycenter);
177
178	✓✓✓✓	280308	if ((_gx_utility_rectangle_point_detect(&clip[0], point)) \|\|
179	✓✓	253685	(_gx_utility_rectangle_point_detect(&clip[1], point)) \|\|
180	✓✓	241019	(_gx_utility_rectangle_point_detect(&clip[2], point)) \|\|
181		120010	(_gx_utility_rectangle_point_detect(&clip[3], point)))
182			{
183		27830	display -> gx_display_driver_pixel_write(context, point.gx_point_x, point.gx_point_y, brush -> gx_brush_line_color);
184			}
185
186		147632	point.gx_point_x = (GX_VALUE)(y * sign[index][0] + xcenter);
187		147632	point.gx_point_y = (GX_VALUE)(x * sign[index][1] + ycenter);
188
189	✓✓✓✓	284036	if ((_gx_utility_rectangle_point_detect(&clip[0], point)) \|\|
190	✓✓	265257	(_gx_utility_rectangle_point_detect(&clip[1], point)) \|\|
191	✓✓	256943	(_gx_utility_rectangle_point_detect(&clip[2], point)) \|\|
192		128090	(_gx_utility_rectangle_point_detect(&clip[3], point)))
193			{
194		19795	display -> gx_display_driver_pixel_write(context, point.gx_point_x, point.gx_point_y, brush -> gx_brush_line_color);
195			}
196			}
197
198	✓✓	36908	if (d < 0)
199			{
200		21334	d += 8 * x + 12;
201			}
202			else
203			{
204		15574	d += 8 * (x - y) + 20;
205		15574	y--;
206			}
207		36908	x++;
208			}
209			#if defined (GX_BRUSH_ALPHA_SUPPORT)
210			}
211			#endif
212			}
213			#endif
214