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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	gx_display_driver_4444argb_canvas_blend.c	Lines:	38	38	100.0 %
Date:	2024-12-05 08:52:37	Branches:	6	6	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_display.h"
#include "gx_utility.h"

#define ALPHAVAL(_c) (GX_UBYTE)(((_c) >> 12) & 0xf)
#define REDVAL(_c)   (GX_UBYTE)(((_c) >> 8) & 0xf)
#define GREENVAL(_c) (GX_UBYTE)(((_c) >> 4) & 0xf)
#define BLUEVAL(_c)  (GX_UBYTE)((_c) & 0xf)

#define ASSEMBLECOLOR(_a, _r, _g, _b) \
    ((((_a) & 0xf) << 12)   |         \
     (((_r) & 0xf) << 8)   |          \
     (((_g) & 0xf) << 4)    |         \
     ((_b) & 0xf))


/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _gx_display_driver_4444argb_canvas_blend            PORTABLE C      */
/*                                                           6.1          */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Kenneth Maxwell, Microsoft Corporation                              */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    Canvas blend function for 4444argb color foramt.                    */
/*                                                                        */
/*  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                                                  */
/*                                                                        */
/*  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    */
/*                                                                        */
/**************************************************************************/
VOID _gx_display_driver_4444argb_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     falpha;
GX_UBYTE     fred;
GX_UBYTE     fgreen;
GX_UBYTE     fblue;
GX_UBYTE     balpha;
GX_UBYTE     bred;
GX_UBYTE     bgreen;
GX_UBYTE     bblue;
GX_UBYTE     inv_alpha;
GX_UBYTE     combined_alpha;
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))
    {

        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 */
                falpha = ALPHAVAL(fcolor);
                falpha = (GX_UBYTE)(falpha | (falpha << 4));
                fred = REDVAL(fcolor);
                fgreen = GREENVAL(fcolor);
                fblue = BLUEVAL(fcolor);

                combined_alpha = (GX_UBYTE)((falpha * canvas -> gx_canvas_alpha) >> 8);

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

                /* split background color into alpha, red, green, and blue components */
                balpha = ALPHAVAL(bcolor);
                balpha = (GX_UBYTE)(balpha | (balpha << 4));
                bred = REDVAL(bcolor);
                bgreen = GREENVAL(bcolor);
                bblue = BLUEVAL(bcolor);

                /* background alpha is inverse of foreground alpha */
                inv_alpha = (GX_UBYTE)(256 - combined_alpha);

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

                /* re-assemble into 16-bit color and write it out */
                *write++ = (USHORT)ASSEMBLECOLOR(falpha, 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			*
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			/* Include necessary system files. */
24
25			#include "gx_api.h"
26			#include "gx_display.h"
27			#include "gx_utility.h"
28
29			#define ALPHAVAL(_c) (GX_UBYTE)(((_c) >> 12) & 0xf)
30			#define REDVAL(_c) (GX_UBYTE)(((_c) >> 8) & 0xf)
31			#define GREENVAL(_c) (GX_UBYTE)(((_c) >> 4) & 0xf)
32			#define BLUEVAL(_c) (GX_UBYTE)((_c) & 0xf)
33
34			#define ASSEMBLECOLOR(_a, _r, _g, _b) \
35			((((_a) & 0xf) << 12) \| \
36			(((_r) & 0xf) << 8) \| \
37			(((_g) & 0xf) << 4) \| \
38			((_b) & 0xf))
39
40
41			/**************************************************************************/
42			/* */
43			/* FUNCTION RELEASE */
44			/* */
45			/* _gx_display_driver_4444argb_canvas_blend PORTABLE C */
46			/* 6.1 */
47			/* AUTHOR */
48			/* */
49			/* Kenneth Maxwell, Microsoft Corporation */
50			/* */
51			/* DESCRIPTION */
52			/* */
53			/* Canvas blend function for 4444argb color foramt. */
54			/* */
55			/* INPUT */
56			/* */
57			/* canvas The canvas to blend to */
58			/* composite The canvas to blend from */
59			/* */
60			/* OUTPUT */
61			/* */
62			/* None */
63			/* */
64			/* CALLS */
65			/* */
66			/* _gx_utility_rectangle_shift Adjust the rectangle */
67			/* _gx_utility_recttangle_overlap_detect Detect whether two areas */
68			/* overlap */
69			/* REDVAL Extrace Red from canvas */
70			/* GREENVAL Extrace Green from canvas */
71			/* BLUEVAL Extrace Blue from canvas */
72			/* ASSEMBLECOLOR Compose the RGB color */
73			/* */
74			/* CALLED BY */
75			/* */
76			/* GUIX Internal Code */
77			/* */
78			/* RELEASE HISTORY */
79			/* */
80			/* DATE NAME DESCRIPTION */
81			/* */
82			/* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
83			/* 09-30-2020 Kenneth Maxwell Modified comment(s), */
84			/* resulting in version 6.1 */
85			/* */
86			/**************************************************************************/
87		255	VOID _gx_display_driver_4444argb_canvas_blend(GX_CANVAS canvas, GX_CANVAS composite)
88			{
89			GX_RECTANGLE dirty;
90			GX_RECTANGLE overlap;
91			USHORT *read;
92			USHORT *read_start;
93			USHORT *write;
94			USHORT *write_start;
95			USHORT fcolor;
96			GX_UBYTE falpha;
97			GX_UBYTE fred;
98			GX_UBYTE fgreen;
99			GX_UBYTE fblue;
100			GX_UBYTE balpha;
101			GX_UBYTE bred;
102			GX_UBYTE bgreen;
103			GX_UBYTE bblue;
104			GX_UBYTE inv_alpha;
105			GX_UBYTE combined_alpha;
106			USHORT bcolor;
107			INT row;
108			INT col;
109
110		255	dirty.gx_rectangle_left = dirty.gx_rectangle_top = 0;
111		255	dirty.gx_rectangle_right = (GX_VALUE)(canvas -> gx_canvas_x_resolution - 1);
112		255	dirty.gx_rectangle_bottom = (GX_VALUE)(canvas -> gx_canvas_y_resolution - 1);
113
114		255	_gx_utility_rectangle_shift(&dirty, canvas -> gx_canvas_display_offset_x, canvas -> gx_canvas_display_offset_y);
115
116	✓✓	255	if (_gx_utility_rectangle_overlap_detect(&dirty, &composite -> gx_canvas_dirty_area, &overlap))
117			{
118
119		254	read_start = (USHORT *)canvas -> gx_canvas_memory;
120
121			/* index into starting row */
122		254	read_start += (overlap.gx_rectangle_top - dirty.gx_rectangle_top) * canvas -> gx_canvas_x_resolution;
123
124			/* index into pixel */
125
126		254	read_start += overlap.gx_rectangle_left - dirty.gx_rectangle_left;
127
128			/* calculate the write pointer */
129		254	write_start = (USHORT *)composite -> gx_canvas_memory;
130		254	write_start += overlap.gx_rectangle_top * composite -> gx_canvas_x_resolution;
131		254	write_start += overlap.gx_rectangle_left;
132
133	✓✓	18796	for (row = overlap.gx_rectangle_top; row <= overlap.gx_rectangle_bottom; row++)
134			{
135		18542	read = read_start;
136		18542	write = write_start;
137
138	✓✓	1761490	for (col = overlap.gx_rectangle_left; col <= overlap.gx_rectangle_right; col++)
139			{
140			/* read the foreground color */
141		1742948	fcolor = *read++;
142
143			/* split foreground into red, green, and blue components */
144		1742948	falpha = ALPHAVAL(fcolor);
145		1742948	falpha = (GX_UBYTE)(falpha \| (falpha << 4));
146		1742948	fred = REDVAL(fcolor);
147		1742948	fgreen = GREENVAL(fcolor);
148		1742948	fblue = BLUEVAL(fcolor);
149
150		1742948	combined_alpha = (GX_UBYTE)((falpha * canvas -> gx_canvas_alpha) >> 8);
151
152			/* read background color */
153		1742948	bcolor = *write;
154
155			/* split background color into alpha, red, green, and blue components */
156		1742948	balpha = ALPHAVAL(bcolor);
157		1742948	balpha = (GX_UBYTE)(balpha \| (balpha << 4));
158		1742948	bred = REDVAL(bcolor);
159		1742948	bgreen = GREENVAL(bcolor);
160		1742948	bblue = BLUEVAL(bcolor);
161
162			/* background alpha is inverse of foreground alpha */
163		1742948	inv_alpha = (GX_UBYTE)(256 - combined_alpha);
164
165			/* blend foreground and background, each color channel */
166		1742948	falpha = (GX_UBYTE)(((balpha * inv_alpha) + (falpha * combined_alpha)) >> 8);
167		1742948	fred = (GX_UBYTE)(((bred * inv_alpha) + (fred * combined_alpha)) >> 8);
168		1742948	fgreen = (GX_UBYTE)(((bgreen * inv_alpha) + (fgreen * combined_alpha)) >> 8);
169		1742948	fblue = (GX_UBYTE)(((bblue * inv_alpha) + (fblue * combined_alpha)) >> 8);
170
171			/* re-assemble into 16-bit color and write it out */
172		1742948	*write++ = (USHORT)ASSEMBLECOLOR(falpha, fred, fgreen, fblue);
173			}
174		18542	write_start += composite -> gx_canvas_x_resolution;
175		18542	read_start += canvas -> gx_canvas_x_resolution;
176			}
177			}
178		255	}
179