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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	gx_display_driver_24xrgb_canvas_blend.c	Lines:	33	33	100.0 %
Date:	2026-03-06 19:21:09	Branches:	6	6	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 REDVAL(_c)   (GX_UBYTE)((_c) >> 16)
#define GREENVAL(_c) (GX_UBYTE)((_c) >> 8)
#define BLUEVAL(_c)  (GX_UBYTE)(_c)


/* Define macros for assembling a 24-bit r:g:b value from 3 components.  */

#define ASSEMBLECOLOR(_r, _g, _b) \
    (((_r) << 16) |               \
     ((_g) << 8) |                \
     (_b))

#define GX_SOURCE_CODE

/* Include necessary system files.  */

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


/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _gx_display_driver_24xrgb_canvas_blend              PORTABLE C      */
/*                                                           6.1          */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Kenneth Maxwell, Microsoft Corporation                              */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    Canvas blend function for 24xrgb color format.                      */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*   canvas                                 The canvas to blend to        */
/*   composite                              The canvas to blend from      */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    None                                                                */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    _gx_utility_rectangle_shift           Adjust the rectangle          */
/*    _gx_utility_recttangle_overlap_detect Detect whether two areas      */
/*                                            overlap                     */
/*    REDVAL                                Extrace Red from canvas       */
/*    GREENVAL                              Extrace Green from canvas     */
/*    BLUEVAL                               Extrace Blue from canvas      */
/*    ASSEMBLECOLOR                         Compose the RGB color         */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    GUIX Internal Code                                                  */
/*                                                                        */
/**************************************************************************/
VOID _gx_display_driver_24xrgb_canvas_blend(GX_CANVAS *canvas, GX_CANVAS *composite)
{
GX_RECTANGLE dirty;
GX_RECTANGLE overlap;
ULONG       *read;
ULONG       *read_start;
ULONG       *write;
ULONG       *write_start;
ULONG        fcolor;
GX_UBYTE     fred, fgreen, fblue;
GX_UBYTE     bred, bgreen, bblue;
GX_UBYTE     alpha, balpha;

ULONG        bcolor;
INT          row;
INT          col;

    dirty.gx_rectangle_left = dirty.gx_rectangle_top = 0;
    dirty.gx_rectangle_right = (GX_VALUE)(canvas -> gx_canvas_x_resolution - 1);
    dirty.gx_rectangle_bottom = (GX_VALUE)(canvas -> gx_canvas_y_resolution - 1);

    _gx_utility_rectangle_shift(&dirty, canvas -> gx_canvas_display_offset_x, canvas -> gx_canvas_display_offset_y);

    if (_gx_utility_rectangle_overlap_detect(&dirty, &composite -> gx_canvas_dirty_area, &overlap))
    {
        alpha = canvas -> gx_canvas_alpha;
        balpha = (GX_UBYTE)(256 - alpha);

        read_start = (ULONG *)canvas -> gx_canvas_memory;

        /* index into starting row */
        read_start += (overlap.gx_rectangle_top - dirty.gx_rectangle_top) * canvas -> gx_canvas_x_resolution;

        /* index into pixel */

        read_start += overlap.gx_rectangle_left - dirty.gx_rectangle_left;

        /* calculate the write pointer */
        write_start = (ULONG *)composite -> gx_canvas_memory;
        write_start += overlap.gx_rectangle_top * composite -> gx_canvas_x_resolution;
        write_start += overlap.gx_rectangle_left;

        for (row = overlap.gx_rectangle_top; row <= overlap.gx_rectangle_bottom; row++)
        {
            read = read_start;
            write = write_start;

            for (col = overlap.gx_rectangle_left; col <= overlap.gx_rectangle_right; col++)
            {
                /* read the foreground color */
                fcolor = *read++;

                /* split foreground into red, green, and blue components */
                fred = REDVAL(fcolor);
                fgreen = GREENVAL(fcolor);
                fblue = BLUEVAL(fcolor);

                /* read background color */
                bcolor = *write;

                /* split background color into red, green, and blue components */
                bred = REDVAL(bcolor);
                bgreen = GREENVAL(bcolor);
                bblue = BLUEVAL(bcolor);

                /* blend foreground and background, each color channel */
                fred = (GX_UBYTE)(((bred * balpha) + (fred * alpha)) >> 8);
                fgreen = (GX_UBYTE)(((bgreen * balpha) + (fgreen * alpha)) >> 8);
                fblue = (GX_UBYTE)(((bblue * balpha) + (fblue * alpha)) >> 8);

                /* re-assemble into 16-bit color and write it out */
                *write++ = ASSEMBLECOLOR((ULONG)fred, (ULONG)fgreen, (ULONG)fblue);
            }
            write_start += composite -> gx_canvas_x_resolution;
            read_start += canvas -> gx_canvas_x_resolution;
        }
    }
}



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 REDVAL(_c) (GX_UBYTE)((_c) >> 16)
23			#define GREENVAL(_c) (GX_UBYTE)((_c) >> 8)
24			#define BLUEVAL(_c) (GX_UBYTE)(_c)
25
26
27			/* Define macros for assembling a 24-bit r:g:b value from 3 components. */
28
29			#define ASSEMBLECOLOR(_r, _g, _b) \
30			(((_r) << 16) \| \
31			((_g) << 8) \| \
32			(_b))
33
34			#define GX_SOURCE_CODE
35
36			/* Include necessary system files. */
37
38			#include "gx_api.h"
39			#include "gx_display.h"
40			#include "gx_utility.h"
41
42
43			/**************************************************************************/
44			/* */
45			/* FUNCTION RELEASE */
46			/* */
47			/* _gx_display_driver_24xrgb_canvas_blend PORTABLE C */
48			/* 6.1 */
49			/* AUTHOR */
50			/* */
51			/* Kenneth Maxwell, Microsoft Corporation */
52			/* */
53			/* DESCRIPTION */
54			/* */
55			/* Canvas blend function for 24xrgb color format. */
56			/* */
57			/* INPUT */
58			/* */
59			/* canvas The canvas to blend to */
60			/* composite The canvas to blend from */
61			/* */
62			/* OUTPUT */
63			/* */
64			/* None */
65			/* */
66			/* CALLS */
67			/* */
68			/* _gx_utility_rectangle_shift Adjust the rectangle */
69			/* _gx_utility_recttangle_overlap_detect Detect whether two areas */
70			/* overlap */
71			/* REDVAL Extrace Red from canvas */
72			/* GREENVAL Extrace Green from canvas */
73			/* BLUEVAL Extrace Blue from canvas */
74			/* ASSEMBLECOLOR Compose the RGB color */
75			/* */
76			/* CALLED BY */
77			/* */
78			/* GUIX Internal Code */
79			/* */
80			/**************************************************************************/
81		259	VOID _gx_display_driver_24xrgb_canvas_blend(GX_CANVAS canvas, GX_CANVAS composite)
82			{
83			GX_RECTANGLE dirty;
84			GX_RECTANGLE overlap;
85			ULONG *read;
86			ULONG *read_start;
87			ULONG *write;
88			ULONG *write_start;
89			ULONG fcolor;
90			GX_UBYTE fred, fgreen, fblue;
91			GX_UBYTE bred, bgreen, bblue;
92			GX_UBYTE alpha, balpha;
93
94			ULONG bcolor;
95			INT row;
96			INT col;
97
98		259	dirty.gx_rectangle_left = dirty.gx_rectangle_top = 0;
99		259	dirty.gx_rectangle_right = (GX_VALUE)(canvas -> gx_canvas_x_resolution - 1);
100		259	dirty.gx_rectangle_bottom = (GX_VALUE)(canvas -> gx_canvas_y_resolution - 1);
101
102		259	_gx_utility_rectangle_shift(&dirty, canvas -> gx_canvas_display_offset_x, canvas -> gx_canvas_display_offset_y);
103
104	✓✓	259	if (_gx_utility_rectangle_overlap_detect(&dirty, &composite -> gx_canvas_dirty_area, &overlap))
105			{
106		258	alpha = canvas -> gx_canvas_alpha;
107		258	balpha = (GX_UBYTE)(256 - alpha);
108
109		258	read_start = (ULONG *)canvas -> gx_canvas_memory;
110
111			/* index into starting row */
112		258	read_start += (overlap.gx_rectangle_top - dirty.gx_rectangle_top) * canvas -> gx_canvas_x_resolution;
113
114			/* index into pixel */
115
116		258	read_start += overlap.gx_rectangle_left - dirty.gx_rectangle_left;
117
118			/* calculate the write pointer */
119		258	write_start = (ULONG *)composite -> gx_canvas_memory;
120		258	write_start += overlap.gx_rectangle_top * composite -> gx_canvas_x_resolution;
121		258	write_start += overlap.gx_rectangle_left;
122
123	✓✓	19062	for (row = overlap.gx_rectangle_top; row <= overlap.gx_rectangle_bottom; row++)
124			{
125		18804	read = read_start;
126		18804	write = write_start;
127
128	✓✓	1786380	for (col = overlap.gx_rectangle_left; col <= overlap.gx_rectangle_right; col++)
129			{
130			/* read the foreground color */
131		1767576	fcolor = *read++;
132
133			/* split foreground into red, green, and blue components */
134		1767576	fred = REDVAL(fcolor);
135		1767576	fgreen = GREENVAL(fcolor);
136		1767576	fblue = BLUEVAL(fcolor);
137
138			/* read background color */
139		1767576	bcolor = *write;
140
141			/* split background color into red, green, and blue components */
142		1767576	bred = REDVAL(bcolor);
143		1767576	bgreen = GREENVAL(bcolor);
144		1767576	bblue = BLUEVAL(bcolor);
145
146			/* blend foreground and background, each color channel */
147		1767576	fred = (GX_UBYTE)(((bred * balpha) + (fred * alpha)) >> 8);
148		1767576	fgreen = (GX_UBYTE)(((bgreen * balpha) + (fgreen * alpha)) >> 8);
149		1767576	fblue = (GX_UBYTE)(((bblue * balpha) + (fblue * alpha)) >> 8);
150
151			/* re-assemble into 16-bit color and write it out */
152		1767576	*write++ = ASSEMBLECOLOR((ULONG)fred, (ULONG)fgreen, (ULONG)fblue);
153			}
154		18804	write_start += composite -> gx_canvas_x_resolution;
155		18804	read_start += canvas -> gx_canvas_x_resolution;
156			}
157			}
158		259	}
159