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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	gx_display_driver_4bpp_glyph_1bit_draw.c	Lines:	70	70	100.0 %
Date:	2024-12-05 08:52:37	Branches:	58	58	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_4bpp_glyph_1bit_draw             PORTABLE C      */
/*                                                           6.1          */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Kenneth Maxwell, Microsoft Corporation                              */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function draws monochrome font to the 4bpp canvas, clipped     */
/*    to one viweport.                                                    */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    context                               Draw context                  */
/*    draw_area                             The region bound by the       */
/*                                            rectangle where the glyph   */
/*                                            is drawn                    */
/*    map_offset                            X,Y offset into the glyph map */
/*    glyph                                 Pointer to the glyph          */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    None                                                                */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    None                                                                */
/*                                                                        */
/*  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    */
/*                                                                        */
/**************************************************************************/

#define WRITE_PIXEL if (alpha & mask)                      \
    {                                                      \
        *put = *put & (GX_UBYTE)(~putmask);                \
        *put = *put | (GX_UBYTE)(text_color & putmask);    \
    }                                                      \
    putmask = putmask >> 4;                                \
    if (putmask == 0)                                      \
    {                                                      \
        putmask = 0xf0;                                    \
        put++;                                             \
    }


VOID _gx_display_driver_4bpp_glyph_1bit_draw(GX_DRAW_CONTEXT *context, GX_RECTANGLE *draw_area, GX_POINT *map_offset, const GX_GLYPH *glyph)
{
GX_UBYTE *glyph_row;
GX_UBYTE *glyph_data;
UINT      row;
UINT      pixel_per_row;
UINT      pixel_in_first_byte;
UINT      pixel_in_last_byte = 0;
GX_UBYTE  text_color;
UINT      y_height;
GX_UBYTE  alpha;
UINT      glyph_width;
GX_UBYTE *put;
UINT      num_bytes;
UINT      num_bits;
GX_UBYTE *line_start;
GX_UBYTE  mask, init_mask;
UINT      i;
GX_UBYTE  putmask;
INT       putstride;

    text_color =  (GX_UBYTE)context -> gx_draw_context_brush.gx_brush_line_color;
    text_color |= (GX_UBYTE)(text_color << 4);
    pixel_per_row = (UINT)draw_area -> gx_rectangle_right - (UINT)draw_area -> gx_rectangle_left + (UINT)1;
    putstride = (context -> gx_draw_context_pitch + 1) >> 1;
    /* pickup pointer to current dispaly driver */
    /*display = context -> gx_draw_context_display;*/

    /* Find the width of the glyph, in terms of bytes */
    glyph_width = glyph -> gx_glyph_width;
    /* Make it byte-aligned. */
    glyph_width = (glyph_width + 7) >> 3;

    /* Compute the number of useful bytes from the glyph this routine is going to use.
       Because of map_offset, the first byte may contain pixel bits we don't need to draw;
       And the width of the draw_area may produce part of the last byte in the row to be ignored. */
    num_bytes = ((UINT)map_offset -> gx_point_x + pixel_per_row + 7) >> 3;
    /* Take into account if map_offset specifies the number of bytes to ignore from the beginning of the row. */
    num_bytes -= (UINT)(map_offset -> gx_point_x) >> 3;

    /* Compute the number of pixels to draw from the first byte of the glyph data. */
    pixel_in_first_byte = (UINT)(8 - ((map_offset -> gx_point_x) & 0x7));
    init_mask = (GX_UBYTE)(1 << (pixel_in_first_byte - 1));
    /* Compute the number of pixels to draw from the last byte, if there are more than one byte in a row. */
    if (num_bytes != 1)
    {
        pixel_in_last_byte = (map_offset -> gx_point_x + (INT)pixel_per_row) & 0x7;
        if (pixel_in_last_byte == 0)
        {
            pixel_in_last_byte = 8;
        }
    }
    else
    {
        if ((map_offset -> gx_point_x + (INT)pixel_per_row) < 8)
        {
            pixel_in_first_byte = pixel_per_row;
        }
        else
        {
            pixel_in_last_byte = 0;
        }
    }


    glyph_row = (GX_UBYTE *)glyph -> gx_glyph_map;

    if (map_offset -> gx_point_y)
    {
        glyph_row = glyph_row + ((INT)glyph_width * map_offset -> gx_point_y);
    }

    glyph_row += (map_offset -> gx_point_x >> 3);

    y_height = (UINT)(draw_area -> gx_rectangle_bottom - draw_area -> gx_rectangle_top + 1);

    line_start = (GX_UBYTE *)context -> gx_draw_context_memory;
    line_start += putstride * (draw_area -> gx_rectangle_top);
    line_start += draw_area -> gx_rectangle_left >> 1;


    for (row = 0; row < y_height; row++)
    {
        if (draw_area -> gx_rectangle_left & 0x01)
        {
            putmask = 0x0f;
        }
        else
        {
            putmask = 0xf0;
        }
        glyph_data = glyph_row;
        alpha = *(glyph_data);
        mask = init_mask;
        num_bits = pixel_in_first_byte;
        put = line_start;
        for (i = 0; i < num_bytes; i++)
        {
            if ((i == (num_bytes - 1)) && (num_bytes > 1))
            {
                num_bits = pixel_in_last_byte;
            }
            switch (num_bits)
            {
            case 8:
                WRITE_PIXEL;
                mask >>= 1;
                /* fallthrough */
            case 7:
                WRITE_PIXEL;
                mask >>= 1;
                /* fallthrough */
            case 6:
                WRITE_PIXEL;
                mask >>= 1;
                /* fallthrough */
            case 5:
                WRITE_PIXEL;
                mask >>= 1;
                /* fallthrough */
            case 4:
                WRITE_PIXEL;
                mask >>= 1;
                /* fallthrough */
            case 3:
                WRITE_PIXEL;
                mask >>= 1;
                /* fallthrough */
            case 2:
                WRITE_PIXEL;
                mask >>= 1;
                /* fallthrough */
            default:
                WRITE_PIXEL;
            }
            glyph_data++;
            alpha = *(glyph_data);
            num_bits = 8;
            mask = 0x80;
        }

        glyph_row +=  glyph_width;
        line_start += putstride;
    }

    return;
}



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_4bpp_glyph_1bit_draw PORTABLE C */
36			/* 6.1 */
37			/* AUTHOR */
38			/* */
39			/* Kenneth Maxwell, Microsoft Corporation */
40			/* */
41			/* DESCRIPTION */
42			/* */
43			/* This function draws monochrome font to the 4bpp canvas, clipped */
44			/* to one viweport. */
45			/* */
46			/* INPUT */
47			/* */
48			/* context Draw context */
49			/* draw_area The region bound by the */
50			/* rectangle where the glyph */
51			/* is drawn */
52			/* map_offset X,Y offset into the glyph map */
53			/* glyph Pointer to the glyph */
54			/* */
55			/* OUTPUT */
56			/* */
57			/* None */
58			/* */
59			/* CALLS */
60			/* */
61			/* None */
62			/* */
63			/* CALLED BY */
64			/* */
65			/* GUIX internal code */
66			/* */
67			/* RELEASE HISTORY */
68			/* */
69			/* DATE NAME DESCRIPTION */
70			/* */
71			/* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
72			/* 09-30-2020 Kenneth Maxwell Modified comment(s), */
73			/* resulting in version 6.1 */
74			/* */
75			/**************************************************************************/
76
77			#define WRITE_PIXEL if (alpha & mask) \
78			{ \
79			put = put & (GX_UBYTE)(~putmask); \
80			put = put \| (GX_UBYTE)(text_color & putmask); \
81			} \
82			putmask = putmask >> 4; \
83			if (putmask == 0) \
84			{ \
85			putmask = 0xf0; \
86			put++; \
87			}
88
89
90		163700	VOID _gx_display_driver_4bpp_glyph_1bit_draw(GX_DRAW_CONTEXT context, GX_RECTANGLE draw_area, GX_POINT map_offset, const GX_GLYPH glyph)
91			{
92			GX_UBYTE *glyph_row;
93			GX_UBYTE *glyph_data;
94			UINT row;
95			UINT pixel_per_row;
96			UINT pixel_in_first_byte;
97		163700	UINT pixel_in_last_byte = 0;
98			GX_UBYTE text_color;
99			UINT y_height;
100			GX_UBYTE alpha;
101			UINT glyph_width;
102			GX_UBYTE *put;
103			UINT num_bytes;
104			UINT num_bits;
105			GX_UBYTE *line_start;
106			GX_UBYTE mask, init_mask;
107			UINT i;
108			GX_UBYTE putmask;
109			INT putstride;
110
111		163700	text_color = (GX_UBYTE)context -> gx_draw_context_brush.gx_brush_line_color;
112		163700	text_color \|= (GX_UBYTE)(text_color << 4);
113		163700	pixel_per_row = (UINT)draw_area -> gx_rectangle_right - (UINT)draw_area -> gx_rectangle_left + (UINT)1;
114		163700	putstride = (context -> gx_draw_context_pitch + 1) >> 1;
115			/* pickup pointer to current dispaly driver */
116			/display = context -> gx_draw_context_display;/
117
118			/* Find the width of the glyph, in terms of bytes */
119		163700	glyph_width = glyph -> gx_glyph_width;
120			/* Make it byte-aligned. */
121		163700	glyph_width = (glyph_width + 7) >> 3;
122
123			/* Compute the number of useful bytes from the glyph this routine is going to use.
124			Because of map_offset, the first byte may contain pixel bits we don't need to draw;
125			And the width of the draw_area may produce part of the last byte in the row to be ignored. */
126		163700	num_bytes = ((UINT)map_offset -> gx_point_x + pixel_per_row + 7) >> 3;
127			/* Take into account if map_offset specifies the number of bytes to ignore from the beginning of the row. */
128		163700	num_bytes -= (UINT)(map_offset -> gx_point_x) >> 3;
129
130			/* Compute the number of pixels to draw from the first byte of the glyph data. */
131		163700	pixel_in_first_byte = (UINT)(8 - ((map_offset -> gx_point_x) & 0x7));
132		163700	init_mask = (GX_UBYTE)(1 << (pixel_in_first_byte - 1));
133			/* Compute the number of pixels to draw from the last byte, if there are more than one byte in a row. */
134	✓✓	163700	if (num_bytes != 1)
135			{
136		65149	pixel_in_last_byte = (map_offset -> gx_point_x + (INT)pixel_per_row) & 0x7;
137	✓✓	65149	if (pixel_in_last_byte == 0)
138			{
139		2	pixel_in_last_byte = 8;
140			}
141			}
142			else
143			{
144	✓✓	98551	if ((map_offset -> gx_point_x + (INT)pixel_per_row) < 8)
145			{
146		65679	pixel_in_first_byte = pixel_per_row;
147			}
148			else
149			{
150		32872	pixel_in_last_byte = 0;
151			}
152			}
153
154
155		163700	glyph_row = (GX_UBYTE *)glyph -> gx_glyph_map;
156
157	✓✓	163700	if (map_offset -> gx_point_y)
158			{
159		11	glyph_row = glyph_row + ((INT)glyph_width * map_offset -> gx_point_y);
160			}
161
162		163700	glyph_row += (map_offset -> gx_point_x >> 3);
163
164		163700	y_height = (UINT)(draw_area -> gx_rectangle_bottom - draw_area -> gx_rectangle_top + 1);
165
166		163700	line_start = (GX_UBYTE *)context -> gx_draw_context_memory;
167		163700	line_start += putstride * (draw_area -> gx_rectangle_top);
168		163700	line_start += draw_area -> gx_rectangle_left >> 1;
169
170
171	✓✓	2100382	for (row = 0; row < y_height; row++)
172			{
173	✓✓	1936682	if (draw_area -> gx_rectangle_left & 0x01)
174			{
175		936376	putmask = 0x0f;
176			}
177			else
178			{
179		1000306	putmask = 0xf0;
180			}
181		1936682	glyph_data = glyph_row;
182		1936682	alpha = *(glyph_data);
183		1936682	mask = init_mask;
184		1936682	num_bits = pixel_in_first_byte;
185		1936682	put = line_start;
186	✓✓	4628610	for (i = 0; i < num_bytes; i++)
187			{
188	✓✓✓✓	2691928	if ((i == (num_bytes - 1)) && (num_bytes > 1))
189			{
190		755192	num_bits = pixel_in_last_byte;
191			}
192	✓✓✓✓ ✓✓✓✓	2691928	switch (num_bits)
193			{
194		1114030	case 8:
195	✓✓✓✓	1114030	WRITE_PIXEL;
196		1114030	mask >>= 1;
197			/* fallthrough */
198		1256791	case 7:
199	✓✓✓✓	1256791	WRITE_PIXEL;
200		1256791	mask >>= 1;
201			/* fallthrough */
202		1595866	case 6:
203	✓✓✓✓	1595866	WRITE_PIXEL;
204		1595866	mask >>= 1;
205			/* fallthrough */
206		1666250	case 5:
207	✓✓✓✓	1666250	WRITE_PIXEL;
208		1666250	mask >>= 1;
209			/* fallthrough */
210		1678393	case 4:
211	✓✓✓✓	1678393	WRITE_PIXEL;
212		1678393	mask >>= 1;
213			/* fallthrough */
214		1688733	case 3:
215	✓✓✓✓	1688733	WRITE_PIXEL;
216		1688733	mask >>= 1;
217			/* fallthrough */
218		2378685	case 2:
219	✓✓✓✓	2378685	WRITE_PIXEL;
220		2378685	mask >>= 1;
221			/* fallthrough */
222		2691928	default:
223	✓✓✓✓	2691928	WRITE_PIXEL;
224			}
225		2691928	glyph_data++;
226		2691928	alpha = *(glyph_data);
227		2691928	num_bits = 8;
228		2691928	mask = 0x80;
229			}
230
231		1936682	glyph_row += glyph_width;
232		1936682	line_start += putstride;
233			}
234
235		163700	return;
236			}
237