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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	gx_display_driver_565rgb_canvas_blend.c	Lines:	33	33	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 REDVAL(_c)   (GX_UBYTE)(((_c) >> 11) & 0x1f)
#define GREENVAL(_c) (GX_UBYTE)(((_c) >> 5) & 0x3f)
#define BLUEVAL(_c)  (GX_UBYTE)(((_c)) & 0x1f)


/* Define macros for assembling a 16-bit r:g:b value from 3 components.  */

#define ASSEMBLECOLOR(_r, _g, _b) \
    ((((_r) & 0x1f) << 11) |      \
     (((_g) & 0x3f) << 5) |       \
     (((_b) & 0x1f)))


/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _gx_display_driver_565rgb_canvas_blend              PORTABLE C      */
/*                                                           6.3.0        */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Kenneth Maxwell, Microsoft Corporation                              */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    Canvas blend function for 565rgb 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),          */
/*  10-31-2023     Ting Zhu                 Modified comment(s),          */
/*                                            added canvas status check,  */
/*                                            resulting in version 6.3.0  */
/*                                                                        */
/**************************************************************************/
VOID _gx_display_driver_565rgb_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;

#ifdef GX_ENABLE_CANVAS_PARTIAL_FRAME_BUFFER
    if (canvas -> gx_canvas_status & GX_CANVAS_PARTIAL_FRAME_BUFFER)
    {
        /* Not supported. */
        return;
    }
#endif

    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			*
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 REDVAL(_c) (GX_UBYTE)(((_c) >> 11) & 0x1f)
30			#define GREENVAL(_c) (GX_UBYTE)(((_c) >> 5) & 0x3f)
31			#define BLUEVAL(_c) (GX_UBYTE)(((_c)) & 0x1f)
32
33
34			/* Define macros for assembling a 16-bit r:g:b value from 3 components. */
35
36			#define ASSEMBLECOLOR(_r, _g, _b) \
37			((((_r) & 0x1f) << 11) \| \
38			(((_g) & 0x3f) << 5) \| \
39			(((_b) & 0x1f)))
40
41
42			/**************************************************************************/
43			/* */
44			/* FUNCTION RELEASE */
45			/* */
46			/* _gx_display_driver_565rgb_canvas_blend PORTABLE C */
47			/* 6.3.0 */
48			/* AUTHOR */
49			/* */
50			/* Kenneth Maxwell, Microsoft Corporation */
51			/* */
52			/* DESCRIPTION */
53			/* */
54			/* Canvas blend function for 565rgb color foramt. */
55			/* */
56			/* INPUT */
57			/* */
58			/* canvas The canvas to blend to */
59			/* composite The canvas to blend from */
60			/* */
61			/* OUTPUT */
62			/* */
63			/* None */
64			/* */
65			/* CALLS */
66			/* */
67			/* _gx_utility_rectangle_shift Adjust the rectangle */
68			/* _gx_utility_recttangle_overlap_detect Detect whether two areas */
69			/* overlap */
70			/* REDVAL Extrace Red from canvas */
71			/* GREENVAL Extrace Green from canvas */
72			/* BLUEVAL Extrace Blue from canvas */
73			/* ASSEMBLECOLOR Compose the RGB color */
74			/* */
75			/* CALLED BY */
76			/* */
77			/* GUIX Internal Code */
78			/* */
79			/* RELEASE HISTORY */
80			/* */
81			/* DATE NAME DESCRIPTION */
82			/* */
83			/* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
84			/* 09-30-2020 Kenneth Maxwell Modified comment(s), */
85			/* 10-31-2023 Ting Zhu Modified comment(s), */
86			/* added canvas status check, */
87			/* resulting in version 6.3.0 */
88			/* */
89			/**************************************************************************/
90		276	VOID _gx_display_driver_565rgb_canvas_blend(GX_CANVAS canvas, GX_CANVAS composite)
91			{
92			GX_RECTANGLE dirty;
93			GX_RECTANGLE overlap;
94			USHORT *read;
95			USHORT *read_start;
96			USHORT *write;
97			USHORT *write_start;
98			USHORT fcolor;
99			GX_UBYTE fred, fgreen, fblue;
100			GX_UBYTE bred, bgreen, bblue;
101			GX_UBYTE alpha, balpha;
102
103			USHORT bcolor;
104			INT row;
105			INT col;
106
107			#ifdef GX_ENABLE_CANVAS_PARTIAL_FRAME_BUFFER
108			if (canvas -> gx_canvas_status & GX_CANVAS_PARTIAL_FRAME_BUFFER)
109			{
110			/* Not supported. */
111			return;
112			}
113			#endif
114
115		276	dirty.gx_rectangle_left = dirty.gx_rectangle_top = 0;
116		276	dirty.gx_rectangle_right = (GX_VALUE)(canvas -> gx_canvas_x_resolution - 1);
117		276	dirty.gx_rectangle_bottom = (GX_VALUE)(canvas -> gx_canvas_y_resolution - 1);
118
119		276	_gx_utility_rectangle_shift(&dirty, canvas -> gx_canvas_display_offset_x, canvas -> gx_canvas_display_offset_y);
120
121	✓✓	276	if (_gx_utility_rectangle_overlap_detect(&dirty, &composite -> gx_canvas_dirty_area, &overlap))
122			{
123		275	alpha = canvas -> gx_canvas_alpha;
124		275	balpha = (GX_UBYTE)(256 - alpha);
125
126		275	read_start = (USHORT *)canvas -> gx_canvas_memory;
127
128			/* index into starting row */
129		275	read_start += (overlap.gx_rectangle_top - dirty.gx_rectangle_top) * canvas -> gx_canvas_x_resolution;
130
131			/* index into pixel */
132
133		275	read_start += overlap.gx_rectangle_left - dirty.gx_rectangle_left;
134
135			/* calculate the write pointer */
136		275	write_start = (USHORT *)composite -> gx_canvas_memory;
137		275	write_start += overlap.gx_rectangle_top * composite -> gx_canvas_x_resolution;
138		275	write_start += overlap.gx_rectangle_left;
139
140	✓✓	20350	for (row = overlap.gx_rectangle_top; row <= overlap.gx_rectangle_bottom; row++)
141			{
142		20075	read = read_start;
143		20075	write = write_start;
144
145	✓✓	1907125	for (col = overlap.gx_rectangle_left; col <= overlap.gx_rectangle_right; col++)
146			{
147			/* read the foreground color */
148		1887050	fcolor = *read++;
149
150			/* split foreground into red, green, and blue components */
151		1887050	fred = REDVAL(fcolor);
152		1887050	fgreen = GREENVAL(fcolor);
153		1887050	fblue = BLUEVAL(fcolor);
154
155			/* read background color */
156		1887050	bcolor = *write;
157
158			/* split background color into red, green, and blue components */
159		1887050	bred = REDVAL(bcolor);
160		1887050	bgreen = GREENVAL(bcolor);
161		1887050	bblue = BLUEVAL(bcolor);
162
163			/* blend foreground and background, each color channel */
164		1887050	fred = (GX_UBYTE)(((bred * balpha) + (fred * alpha)) >> 8);
165		1887050	fgreen = (GX_UBYTE)(((bgreen * balpha) + (fgreen * alpha)) >> 8);
166		1887050	fblue = (GX_UBYTE)(((bblue * balpha) + (fblue * alpha)) >> 8);
167
168			/* re-assemble into 16-bit color and write it out */
169		1887050	*write++ = (USHORT)ASSEMBLECOLOR(fred, fgreen, fblue);
170			}
171		20075	write_start += composite -> gx_canvas_x_resolution;
172		20075	read_start += canvas -> gx_canvas_x_resolution;
173			}
174			}
175		276	}
176