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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	gx_display_driver_generic_rotated_glyph_4bit_draw.c	Lines:	110	110	100.0 %
Date:	2026-03-06 19:21:09	Branches:	44	44	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_system.h"
#include "gx_utility.h"
#include "gx_display.h"

/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _gx_display_driver_generic_rotated_glyph_4bit_draw  PORTABLE C      */
/*                                                           6.1.3        */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Kenneth Maxwell, Microsoft Corporation                              */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function draws the specified text using the current context,   */
/*    clipped to one viewport                                             */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    context                               Draw context                  */
/*    draw_area                             The rectangle where the glyph */
/*                                            is drawn to                 */
/*    map_offset                            Offset from the glyph map     */
/*    glyph                                 The glyph structure           */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    None                                                                */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    [gx_display_driver_pixel_blend]       Call display driver pixel     */
/*                                            blend function              */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    GUIX internal code                                                  */
/*                                                                        */
/**************************************************************************/
VOID _gx_display_driver_generic_rotated_glyph_4bit_draw(GX_DRAW_CONTEXT *context, GX_RECTANGLE *draw_area, GX_POINT *map_offset, GX_CONST GX_GLYPH *glyph)
{
GX_UBYTE *glyph_row;
GX_UBYTE *glyph_data;
UINT      row;
UINT      col;
UINT      pixel_width = 0;
UINT      leading_pixel;
UINT      trailing_pixel;
GX_COLOR  text_color;
UINT      y_height;
GX_UBYTE  alpha;
UINT      pitch;
UINT      index;
VOID      (*blend_func)(GX_DRAW_CONTEXT *context, INT x, INT y, GX_COLOR color, GX_UBYTE alpha);
GX_UBYTE  brush_alpha = 0xff;
GX_VALUE  rotated_map_offset_x;
GX_VALUE  rotated_map_offset_y;
GX_VALUE  rotated_left;
GX_VALUE  rotated_top;

#if defined(GX_BRUSH_ALPHA_SUPPORT)
INT alpha_sum;
    brush_alpha = context -> gx_draw_context_brush.gx_brush_alpha;
    if (brush_alpha == 0)
    {
        return;
    }
#endif

    text_color = context -> gx_draw_context_brush.gx_brush_line_color;

    y_height = (UINT)(draw_area -> gx_rectangle_right - draw_area -> gx_rectangle_left + 1);

    /* Find the width of the glyph */
    pitch = glyph -> gx_glyph_height;
    /* Make it byte-aligned. */
    pitch = (pitch + 1) >> 1;

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

    if (context -> gx_draw_context_display -> gx_display_rotation_angle == GX_SCREEN_ROTATION_CW)
    {
        rotated_left = draw_area -> gx_rectangle_top;
        rotated_top = (GX_VALUE)(context -> gx_draw_context_canvas -> gx_canvas_x_resolution - draw_area -> gx_rectangle_right - 1);

        rotated_map_offset_x = map_offset -> gx_point_y;
        rotated_map_offset_y = (GX_VALUE)(glyph -> gx_glyph_width - map_offset -> gx_point_x - (GX_VALUE)y_height);
    }
    else
    {
        rotated_left = (GX_VALUE)(context -> gx_draw_context_canvas -> gx_canvas_display_offset_y - draw_area -> gx_rectangle_bottom - 1);
        rotated_top = draw_area -> gx_rectangle_left;

        rotated_map_offset_x = (GX_VALUE)(glyph -> gx_glyph_height - map_offset -> gx_point_y - (GX_VALUE)pixel_width);
        rotated_map_offset_y = map_offset -> gx_point_x;
    }

    glyph_row = (GX_UBYTE *)glyph -> gx_glyph_map;

    if (rotated_map_offset_y)
    {
        glyph_row = glyph_row + ((INT)pitch * rotated_map_offset_y);
    }

    glyph_row += (rotated_map_offset_x >> 1);

    GX_SET_BLEND_FUNCTION(blend_func, context -> gx_draw_context_display -> gx_display_color_format)

    leading_pixel = (rotated_map_offset_x & 1);

    pixel_width -= leading_pixel;

    trailing_pixel = pixel_width & 1;

    pixel_width = pixel_width >> 1;

    if (brush_alpha == 0xff)
    {
        for (row = 0; row < y_height; row++)
        {
            col = 0;
            glyph_data = glyph_row;

            if (leading_pixel)
            {
                alpha = (*glyph_data) & 0x0f;
                alpha = (GX_UBYTE)(alpha | (GX_UBYTE)(alpha << 4));

                if (alpha > 0)
                {
                    blend_func(context,
                               rotated_left + (GX_VALUE)col,
                               rotated_top + (GX_VALUE)row,
                               text_color, (GX_UBYTE)alpha);
                }
                col++;
                glyph_data++;
            }

            for (index = 0; index < pixel_width; index++)
            {
                alpha = (*glyph_data) & 0xf0;
                alpha = (GX_UBYTE)(alpha | (GX_UBYTE)(alpha >> 4));

                if (alpha > 0)
                {
                    blend_func(context,
                               rotated_left + (GX_VALUE)col,
                               rotated_top + (GX_VALUE)row,
                               text_color, (GX_UBYTE)alpha);
                }
                col++;

                alpha = (*glyph_data) & 0x0f;
                alpha = (GX_UBYTE)(alpha | (GX_UBYTE)(alpha << 4));

                if (alpha > 0)
                {
                    blend_func(context,
                               rotated_left + (GX_VALUE)col,
                               rotated_top + (GX_VALUE)row,
                               text_color, (GX_UBYTE)alpha);
                }
                col++;
                glyph_data++;
            }

            if (trailing_pixel)
            {
                alpha = (*glyph_data) & 0xf0;
                alpha = (GX_UBYTE)(alpha | (GX_UBYTE)(alpha >> 4));

                if (alpha > 0)
                {
                    blend_func(context,
                               rotated_left + (GX_VALUE)col,
                               rotated_top + (GX_VALUE)row,
                               text_color, (GX_UBYTE)alpha);
                }
            }
            glyph_row += pitch;
        }
    }
#if defined(GX_BRUSH_ALPHA_SUPPORT)
    else
    {
        for (row = 0; row < y_height; row++)
        {
            col = 0;
            glyph_data = glyph_row;

            if (leading_pixel)
            {
                alpha = (*glyph_data) & 0x0f;
                alpha = (GX_UBYTE)(alpha | (GX_UBYTE)(alpha << 4));

                alpha_sum = alpha * brush_alpha / 255;

                if (alpha_sum > 0)
                {
                    blend_func(context,
                               rotated_left + (GX_VALUE)col,
                               rotated_top + (GX_VALUE)row,
                               text_color, (GX_UBYTE)alpha_sum);
                }
                col++;
                glyph_data++;
            }

            for (index = 0; index < pixel_width; index++)
            {
                alpha = (*glyph_data) & 0xf0;
                alpha = (GX_UBYTE)(alpha | (GX_UBYTE)(alpha >> 4));
                alpha_sum = alpha * brush_alpha / 255;

                if (alpha_sum > 0)
                {
                    blend_func(context,
                               rotated_left + (GX_VALUE)col,
                               rotated_top + (GX_VALUE)row,
                               text_color, (GX_UBYTE)alpha_sum);
                }
                col++;

                alpha = (*glyph_data) & 0x0f;
                alpha = (GX_UBYTE)(alpha | (GX_UBYTE)(alpha << 4));
                alpha_sum = alpha * brush_alpha / 255;

                if (alpha_sum > 0)
                {
                    blend_func(context,
                               rotated_left + (GX_VALUE)col,
                               rotated_top + (GX_VALUE)row,
                               text_color, (GX_UBYTE)alpha_sum);
                }
                col++;
                glyph_data++;
            }

            if (trailing_pixel)
            {
                alpha = (*glyph_data) & 0xf0;
                alpha = (GX_UBYTE)(alpha | (GX_UBYTE)(alpha >> 4));
                alpha_sum = alpha * brush_alpha / 255;

                if (alpha_sum > 0)
                {
                    blend_func(context,
                               rotated_left + (GX_VALUE)col,
                               rotated_top + (GX_VALUE)row,
                               text_color, (GX_UBYTE)alpha_sum);
                }
            }
            glyph_row += pitch;
        }
    }
#endif
}



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
25			/* Include necessary system files. */
26
27			#include "gx_api.h"
28			#include "gx_system.h"
29			#include "gx_utility.h"
30			#include "gx_display.h"
31
32			/**************************************************************************/
33			/* */
34			/* FUNCTION RELEASE */
35			/* */
36			/* _gx_display_driver_generic_rotated_glyph_4bit_draw PORTABLE C */
37			/* 6.1.3 */
38			/* AUTHOR */
39			/* */
40			/* Kenneth Maxwell, Microsoft Corporation */
41			/* */
42			/* DESCRIPTION */
43			/* */
44			/* This function draws the specified text using the current context, */
45			/* clipped to one viewport */
46			/* */
47			/* INPUT */
48			/* */
49			/* context Draw context */
50			/* draw_area The rectangle where the glyph */
51			/* is drawn to */
52			/* map_offset Offset from the glyph map */
53			/* glyph The glyph structure */
54			/* */
55			/* OUTPUT */
56			/* */
57			/* None */
58			/* */
59			/* CALLS */
60			/* */
61			/* [gx_display_driver_pixel_blend] Call display driver pixel */
62			/* blend function */
63			/* */
64			/* CALLED BY */
65			/* */
66			/* GUIX internal code */
67			/* */
68			/**************************************************************************/
69		439742	VOID _gx_display_driver_generic_rotated_glyph_4bit_draw(GX_DRAW_CONTEXT context, GX_RECTANGLE draw_area, GX_POINT map_offset, GX_CONST GX_GLYPH glyph)
70			{
71			GX_UBYTE *glyph_row;
72			GX_UBYTE *glyph_data;
73			UINT row;
74			UINT col;
75		439742	UINT pixel_width = 0;
76			UINT leading_pixel;
77			UINT trailing_pixel;
78			GX_COLOR text_color;
79			UINT y_height;
80			GX_UBYTE alpha;
81			UINT pitch;
82			UINT index;
83			VOID (blend_func)(GX_DRAW_CONTEXT context, INT x, INT y, GX_COLOR color, GX_UBYTE alpha);
84		439742	GX_UBYTE brush_alpha = 0xff;
85			GX_VALUE rotated_map_offset_x;
86			GX_VALUE rotated_map_offset_y;
87			GX_VALUE rotated_left;
88			GX_VALUE rotated_top;
89
90			#if defined(GX_BRUSH_ALPHA_SUPPORT)
91			INT alpha_sum;
92		439742	brush_alpha = context -> gx_draw_context_brush.gx_brush_alpha;
93	✓✓	439742	if (brush_alpha == 0)
94			{
95		208	return;
96			}
97			#endif
98
99		439534	text_color = context -> gx_draw_context_brush.gx_brush_line_color;
100
101		439534	y_height = (UINT)(draw_area -> gx_rectangle_right - draw_area -> gx_rectangle_left + 1);
102
103			/* Find the width of the glyph */
104		439534	pitch = glyph -> gx_glyph_height;
105			/* Make it byte-aligned. */
106		439534	pitch = (pitch + 1) >> 1;
107
108		439534	pixel_width = (UINT)(draw_area -> gx_rectangle_bottom - draw_area -> gx_rectangle_top + 1);
109
110	✓✓	439534	if (context -> gx_draw_context_display -> gx_display_rotation_angle == GX_SCREEN_ROTATION_CW)
111			{
112		269594	rotated_left = draw_area -> gx_rectangle_top;
113		269594	rotated_top = (GX_VALUE)(context -> gx_draw_context_canvas -> gx_canvas_x_resolution - draw_area -> gx_rectangle_right - 1);
114
115		269594	rotated_map_offset_x = map_offset -> gx_point_y;
116		269594	rotated_map_offset_y = (GX_VALUE)(glyph -> gx_glyph_width - map_offset -> gx_point_x - (GX_VALUE)y_height);
117			}
118			else
119			{
120		169940	rotated_left = (GX_VALUE)(context -> gx_draw_context_canvas -> gx_canvas_display_offset_y - draw_area -> gx_rectangle_bottom - 1);
121		169940	rotated_top = draw_area -> gx_rectangle_left;
122
123		169940	rotated_map_offset_x = (GX_VALUE)(glyph -> gx_glyph_height - map_offset -> gx_point_y - (GX_VALUE)pixel_width);
124		169940	rotated_map_offset_y = map_offset -> gx_point_x;
125			}
126
127		439534	glyph_row = (GX_UBYTE *)glyph -> gx_glyph_map;
128
129	✓✓	439534	if (rotated_map_offset_y)
130			{
131		4469	glyph_row = glyph_row + ((INT)pitch * rotated_map_offset_y);
132			}
133
134		439534	glyph_row += (rotated_map_offset_x >> 1);
135
136	✓✓✓✓	439534	GX_SET_BLEND_FUNCTION(blend_func, context -> gx_draw_context_display -> gx_display_color_format)
137
138		435955	leading_pixel = (rotated_map_offset_x & 1);
139
140		435955	pixel_width -= leading_pixel;
141
142		435955	trailing_pixel = pixel_width & 1;
143
144		435955	pixel_width = pixel_width >> 1;
145
146	✓✓	435955	if (brush_alpha == 0xff)
147			{
148	✓✓	4000082	for (row = 0; row < y_height; row++)
149			{
150		3564457	col = 0;
151		3564457	glyph_data = glyph_row;
152
153	✓✓	3564457	if (leading_pixel)
154			{
155		264	alpha = (*glyph_data) & 0x0f;
156		264	alpha = (GX_UBYTE)(alpha \| (GX_UBYTE)(alpha << 4));
157
158	✓✓	264	if (alpha > 0)
159			{
160		90	blend_func(context,
161		90	rotated_left + (GX_VALUE)col,
162		90	rotated_top + (GX_VALUE)row,
163			text_color, (GX_UBYTE)alpha);
164			}
165		264	col++;
166		264	glyph_data++;
167			}
168
169	✓✓	23758290	for (index = 0; index < pixel_width; index++)
170			{
171		20193833	alpha = (*glyph_data) & 0xf0;
172		20193833	alpha = (GX_UBYTE)(alpha \| (GX_UBYTE)(alpha >> 4));
173
174	✓✓	20193833	if (alpha > 0)
175			{
176		12944637	blend_func(context,
177		12944637	rotated_left + (GX_VALUE)col,
178		12944637	rotated_top + (GX_VALUE)row,
179			text_color, (GX_UBYTE)alpha);
180			}
181		20193833	col++;
182
183		20193833	alpha = (*glyph_data) & 0x0f;
184		20193833	alpha = (GX_UBYTE)(alpha \| (GX_UBYTE)(alpha << 4));
185
186	✓✓	20193833	if (alpha > 0)
187			{
188		12974027	blend_func(context,
189		12974027	rotated_left + (GX_VALUE)col,
190		12974027	rotated_top + (GX_VALUE)row,
191			text_color, (GX_UBYTE)alpha);
192			}
193		20193833	col++;
194		20193833	glyph_data++;
195			}
196
197	✓✓	3564457	if (trailing_pixel)
198			{
199		724949	alpha = (*glyph_data) & 0xf0;
200		724949	alpha = (GX_UBYTE)(alpha \| (GX_UBYTE)(alpha >> 4));
201
202	✓✓	724949	if (alpha > 0)
203			{
204		407244	blend_func(context,
205		407244	rotated_left + (GX_VALUE)col,
206		407244	rotated_top + (GX_VALUE)row,
207			text_color, (GX_UBYTE)alpha);
208			}
209			}
210		3564457	glyph_row += pitch;
211			}
212			}
213			#if defined(GX_BRUSH_ALPHA_SUPPORT)
214			else
215			{
216	✓✓	4804	for (row = 0; row < y_height; row++)
217			{
218		4474	col = 0;
219		4474	glyph_data = glyph_row;
220
221	✓✓	4474	if (leading_pixel)
222			{
223		218	alpha = (*glyph_data) & 0x0f;
224		218	alpha = (GX_UBYTE)(alpha \| (GX_UBYTE)(alpha << 4));
225
226		218	alpha_sum = alpha * brush_alpha / 255;
227
228	✓✓	218	if (alpha_sum > 0)
229			{
230		77	blend_func(context,
231		77	rotated_left + (GX_VALUE)col,
232		77	rotated_top + (GX_VALUE)row,
233		77	text_color, (GX_UBYTE)alpha_sum);
234			}
235		218	col++;
236		218	glyph_data++;
237			}
238
239	✓✓	35502	for (index = 0; index < pixel_width; index++)
240			{
241		31028	alpha = (*glyph_data) & 0xf0;
242		31028	alpha = (GX_UBYTE)(alpha \| (GX_UBYTE)(alpha >> 4));
243		31028	alpha_sum = alpha * brush_alpha / 255;
244
245	✓✓	31028	if (alpha_sum > 0)
246			{
247		13097	blend_func(context,
248		13097	rotated_left + (GX_VALUE)col,
249		13097	rotated_top + (GX_VALUE)row,
250		13097	text_color, (GX_UBYTE)alpha_sum);
251			}
252		31028	col++;
253
254		31028	alpha = (*glyph_data) & 0x0f;
255		31028	alpha = (GX_UBYTE)(alpha \| (GX_UBYTE)(alpha << 4));
256		31028	alpha_sum = alpha * brush_alpha / 255;
257
258	✓✓	31028	if (alpha_sum > 0)
259			{
260		12942	blend_func(context,
261		12942	rotated_left + (GX_VALUE)col,
262		12942	rotated_top + (GX_VALUE)row,
263		12942	text_color, (GX_UBYTE)alpha_sum);
264			}
265		31028	col++;
266		31028	glyph_data++;
267			}
268
269	✓✓	4474	if (trailing_pixel)
270			{
271		2098	alpha = (*glyph_data) & 0xf0;
272		2098	alpha = (GX_UBYTE)(alpha \| (GX_UBYTE)(alpha >> 4));
273		2098	alpha_sum = alpha * brush_alpha / 255;
274
275	✓✓	2098	if (alpha_sum > 0)
276			{
277		1144	blend_func(context,
278		1144	rotated_left + (GX_VALUE)col,
279		1144	rotated_top + (GX_VALUE)row,
280		1144	text_color, (GX_UBYTE)alpha_sum);
281			}
282			}
283		4474	glyph_row += pitch;
284			}
285			}
286			#endif
287			}
288