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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	gx_display_driver_1555xrgb_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 GX_SOURCE_CODE

/* Include necessary system files.  */

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

#define REDVAL(_c)   (GX_UBYTE)(((_c) >> 10) & 0x1f)
#define GREENVAL(_c) (GX_UBYTE)(((_c) >> 5) & 0x1f)
#define BLUEVAL(_c)  (GX_UBYTE)(((_c)) & 0x1f)


/* Define macros for assembling a 15-bit r:g:b value from 3 components.  */

#define ASSEMBLECOLOR(_r, _g, _b) \
    ((((_r) & 0x7c) << 10) |      \
     (((_g) & 0x3e) << 5) |       \
     (((_b) & 0x1f)))


/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _gx_display_driver_1555xrgb_canvas_blend            PORTABLE C      */
/*                                                           6.1          */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Kenneth Maxwell, Microsoft Corporation                              */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    Canvas blend function for 1555xrgb color foramt.                    */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*   canvas                                 The canvas to blend to        */
/*   composite                              The canvas to blend from      */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    None                                                                */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    _gx_utility_rectangle_shift           Shift rectangle by specified  */
/*                                            value                       */
/*    _gx_utility_rectangle_overlap_detect  Detect overlaps of specified  */
/*                                            rectangles                  */
/*    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_1555xrgb_canvas_blend(GX_CANVAS *canvas, GX_CANVAS *composite)
{
GX_RECTANGLE dirty;
GX_RECTANGLE overlap;
USHORT      *read;
USHORT      *read_start;
USHORT      *write;
USHORT      *write_start;
USHORT       fcolor;
GX_UBYTE     fred, fgreen, fblue;
GX_UBYTE     bred, bgreen, bblue;
GX_UBYTE     alpha, balpha;

USHORT       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 = (USHORT *)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 = (USHORT *)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++ = (USHORT)ASSEMBLECOLOR(fred, fgreen, 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 GX_SOURCE_CODE
23
24			/* Include necessary system files. */
25
26			#include "gx_api.h"
27			#include "gx_display.h"
28			#include "gx_utility.h"
29
30			#define REDVAL(_c) (GX_UBYTE)(((_c) >> 10) & 0x1f)
31			#define GREENVAL(_c) (GX_UBYTE)(((_c) >> 5) & 0x1f)
32			#define BLUEVAL(_c) (GX_UBYTE)(((_c)) & 0x1f)
33
34
35			/* Define macros for assembling a 15-bit r:g:b value from 3 components. */
36
37			#define ASSEMBLECOLOR(_r, _g, _b) \
38			((((_r) & 0x7c) << 10) \| \
39			(((_g) & 0x3e) << 5) \| \
40			(((_b) & 0x1f)))
41
42
43			/**************************************************************************/
44			/* */
45			/* FUNCTION RELEASE */
46			/* */
47			/* _gx_display_driver_1555xrgb_canvas_blend PORTABLE C */
48			/* 6.1 */
49			/* AUTHOR */
50			/* */
51			/* Kenneth Maxwell, Microsoft Corporation */
52			/* */
53			/* DESCRIPTION */
54			/* */
55			/* Canvas blend function for 1555xrgb color foramt. */
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 Shift rectangle by specified */
69			/* value */
70			/* _gx_utility_rectangle_overlap_detect Detect overlaps of specified */
71			/* rectangles */
72			/* REDVAL Extrace Red from canvas */
73			/* GREENVAL Extrace Green from canvas */
74			/* BLUEVAL Extrace Blue from canvas */
75			/* ASSEMBLECOLOR Compose the RGB color */
76			/* */
77			/* CALLED BY */
78			/* */
79			/* GUIX Internal Code */
80			/* */
81			/**************************************************************************/
82		256	VOID _gx_display_driver_1555xrgb_canvas_blend(GX_CANVAS canvas, GX_CANVAS composite)
83			{
84			GX_RECTANGLE dirty;
85			GX_RECTANGLE overlap;
86			USHORT *read;
87			USHORT *read_start;
88			USHORT *write;
89			USHORT *write_start;
90			USHORT fcolor;
91			GX_UBYTE fred, fgreen, fblue;
92			GX_UBYTE bred, bgreen, bblue;
93			GX_UBYTE alpha, balpha;
94
95			USHORT bcolor;
96			INT row;
97			INT col;
98
99		256	dirty.gx_rectangle_left = dirty.gx_rectangle_top = 0;
100		256	dirty.gx_rectangle_right = (GX_VALUE)(canvas -> gx_canvas_x_resolution - 1);
101		256	dirty.gx_rectangle_bottom = (GX_VALUE)(canvas -> gx_canvas_y_resolution - 1);
102
103		256	_gx_utility_rectangle_shift(&dirty, canvas -> gx_canvas_display_offset_x, canvas -> gx_canvas_display_offset_y);
104
105	✓✓	256	if (_gx_utility_rectangle_overlap_detect(&dirty, &composite -> gx_canvas_dirty_area, &overlap))
106			{
107		255	alpha = canvas -> gx_canvas_alpha;
108		255	balpha = (GX_UBYTE)(256 - alpha);
109
110		255	read_start = (USHORT *)canvas -> gx_canvas_memory;
111
112			/* index into starting row */
113		255	read_start += (overlap.gx_rectangle_top - dirty.gx_rectangle_top) * canvas -> gx_canvas_x_resolution;
114
115			/* index into pixel */
116
117		255	read_start += overlap.gx_rectangle_left - dirty.gx_rectangle_left;
118
119			/* calculate the write pointer */
120		255	write_start = (USHORT *)composite -> gx_canvas_memory;
121		255	write_start += overlap.gx_rectangle_top * composite -> gx_canvas_x_resolution;
122		255	write_start += overlap.gx_rectangle_left;
123
124	✓✓	18870	for (row = overlap.gx_rectangle_top; row <= overlap.gx_rectangle_bottom; row++)
125			{
126		18615	read = read_start;
127		18615	write = write_start;
128
129	✓✓	1768425	for (col = overlap.gx_rectangle_left; col <= overlap.gx_rectangle_right; col++)
130			{
131			/* read the foreground color */
132		1749810	fcolor = *read++;
133
134			/* split foreground into red, green, and blue components */
135		1749810	fred = REDVAL(fcolor);
136		1749810	fgreen = GREENVAL(fcolor);
137		1749810	fblue = BLUEVAL(fcolor);
138
139			/* read background color */
140		1749810	bcolor = *write;
141
142			/* split background color into red, green, and blue components */
143		1749810	bred = REDVAL(bcolor);
144		1749810	bgreen = GREENVAL(bcolor);
145		1749810	bblue = BLUEVAL(bcolor);
146
147			/* blend foreground and background, each color channel */
148		1749810	fred = (GX_UBYTE)(((bred * balpha) + (fred * alpha)) >> 8);
149		1749810	fgreen = (GX_UBYTE)(((bgreen * balpha) + (fgreen * alpha)) >> 8);
150		1749810	fblue = (GX_UBYTE)(((bblue * balpha) + (fblue * alpha)) >> 8);
151
152			/* re-assemble into 16-bit color and write it out */
153		1749810	*write++ = (USHORT)ASSEMBLECOLOR(fred, fgreen, fblue);
154			}
155		18615	write_start += composite -> gx_canvas_x_resolution;
156		18615	read_start += canvas -> gx_canvas_x_resolution;
157			}
158			}
159		256	}
160