Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	gx_canvas_pixelmap_rotate.c	Lines:	80	80	100.0 %
Date:	2024-12-05 08:52:37	Branches:	32	32	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                                                        */
/**                                                                       */
/**   Canvas Management (Canvas)                                          */
/**                                                                       */
/**************************************************************************/

#define GX_SOURCE_CODE


/* Include necessary system files.  */

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

/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _gx_canvas_rotated_pixelmap_bound_calculate         PORTABLE C      */
/*                                                           6.1          */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Kenneth Maxwell, Microsoft Corporation                              */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function calcuates the bounding rectangle of a rotated         */
/*    pixelmap.                                                           */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    rect                                  Rectangle of source pixelmao. */
/*    angle                                 Angle of rotation in degrees. */
/*    rot_cx                                x-coord of rotating center    */
/*    rot_cy                                y-coord of rotating center    */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    status                                Completion status             */
/*                                                                        */
/*  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    */
/*                                                                        */
/**************************************************************************/
static UINT  _gx_canvas_rotated_pixelmap_bound_calculate(GX_RECTANGLE *rect, INT angle, INT rot_cx, INT rot_cy)
{
INT mx[4] = {-1, 1, 1, -1};
INT my[4] = {1, 1, -1, -1};
INT idxminx;
INT idxmaxx;
INT idxmaxy;
INT srcxres;
INT srcyres;
INT cosv;
INT sinv;
INT xres;
INT yres;
INT width;
INT height;
INT x;
INT y;

    angle %= 360;

    if (angle < 0)
    {
        angle += 360;
    }

    /* Calculate rectangle width and height. */
    width = (GX_VALUE)(rect -> gx_rectangle_right - rect -> gx_rectangle_left + 1);
    height = (GX_VALUE)(rect -> gx_rectangle_bottom - rect -> gx_rectangle_top + 1);

    if (angle == 0)
    {
        return GX_SUCCESS;
    }
    if (angle == 90)
    {
        GX_SWAP_VALS(width, height);

        rect -> gx_rectangle_left = (GX_VALUE)(rect -> gx_rectangle_left + rot_cx - (width - 1 - rot_cy));
        rect -> gx_rectangle_top = (GX_VALUE)(rect -> gx_rectangle_top + rot_cy - rot_cx);
    }
    else if (angle == 180)
    {
        rect -> gx_rectangle_left = (GX_VALUE)(rect -> gx_rectangle_left + rot_cx - (width - 1 - rot_cx));
        rect -> gx_rectangle_top = (GX_VALUE)(rect -> gx_rectangle_top + rot_cy - (height - 1 - rot_cy));
    }
    else if (angle == 270)
    {
        GX_SWAP_VALS(width, height);
        rect -> gx_rectangle_left = (GX_VALUE)(rect -> gx_rectangle_left + rot_cx - rot_cy);
        rect -> gx_rectangle_top = (GX_VALUE)(rect -> gx_rectangle_top + rot_cy - (height - 1 - rot_cx));
    }
    else
    {
        idxminx = (angle / 90) & 0x3;
        idxmaxx = (idxminx + 2) & 0x3;
        idxmaxy = (idxminx + 1) & 0x3;

        /* Calculate the source x and y center. */
        srcxres = width >> 1;
        srcyres = height >> 1;

        cosv = _gx_utility_math_cos(GX_FIXED_VAL_MAKE(angle));
        sinv = _gx_utility_math_sin(GX_FIXED_VAL_MAKE(angle));

        xres = mx[idxmaxx] * (srcxres + 2) * cosv - my[idxmaxx] * (srcyres + 2) * sinv;
        yres = my[idxmaxy] * (srcyres + 2) * cosv + mx[idxmaxy] * (srcxres + 2) * sinv;

        xres = GX_FIXED_VAL_TO_INT(xres);
        yres = GX_FIXED_VAL_TO_INT(yres);

        /* Calculate destination width and height. */
        width = (xres << 1);
        height = (yres << 1);

        /* Calculate the new rotation axis. */
        x = GX_FIXED_VAL_TO_INT((rot_cx - srcxres) * cosv - (rot_cy - srcyres) * sinv);
        y = GX_FIXED_VAL_TO_INT((rot_cy - srcyres) * cosv + (rot_cx - srcxres) * sinv);

        x += xres;
        y += yres;

        rect -> gx_rectangle_left = (GX_VALUE)(rect -> gx_rectangle_left + rot_cx - x);
        rect -> gx_rectangle_top = (GX_VALUE)(rect -> gx_rectangle_top + rot_cy - y);
    }
    rect -> gx_rectangle_right = (GX_VALUE)(rect -> gx_rectangle_left + width - 1);
    rect -> gx_rectangle_bottom = (GX_VALUE)(rect -> gx_rectangle_top + height - 1);

    return(GX_SUCCESS);
}

/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _gx_canvas_pixelmap_rotate                          PORTABLE C      */
/*                                                           6.1.7        */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Kenneth Maxwell, Microsoft Corporation                              */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function prepares to draw the specified pixelmap at the        */
/*    requested position.                                                 */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    x_position                            Top-left x-coord to place     */
/*                                            pixelmap                    */
/*    y_position                            Top-left y-coord to place     */
/*                                            pixelmap                    */
/*    pixelmap                              Pointer to actual pixelmap    */
/*                                            to draw                     */
/*    angle                                 The angle to rotate           */
/*    rot_cx                                x-coord of rotating center, if*/
/*                                            -1 is set, default it to    */
/*                                            image center.               */
/*    rot_cy                                y-coord of rotationg center.  */
/*                                            -1 is set, default it to    */
/*                                            image center.               */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    status                                Completion status             */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    _gx_utility_rectangle_define                                        */
/*    _gx_utility_rectangle_overlap_detect                                */
/*    _gx_canvas_rotated_pixelmap_bound_calculate                         */
/*    [gx_display_driver_pixelmap_rotate]                                 */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    Application 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    */
/*  06-02-2021     Kenneth Maxwell          Modified comment(s),          */
/*                                            removed duplicate variable  */
/*                                            assignment,                 */
/*                                            resulting in version 6.1.7  */
/*                                                                        */
/**************************************************************************/
UINT  _gx_canvas_pixelmap_rotate(GX_VALUE x_position, GX_VALUE y_position, GX_PIXELMAP *pixelmap,
                                 INT angle, INT rot_cx, INT rot_cy)
{
GX_DRAW_CONTEXT *context;
GX_DISPLAY      *display;
GX_RECTANGLE     clip_rect;
GX_RECTANGLE     bound;
GX_VIEW         *view;
VOID             (*pmp_function)(GX_DRAW_CONTEXT *, INT, INT, GX_PIXELMAP *, INT, INT, INT);
INT              cx;
INT              cy;

    /* pick up the current drawing context */
    context = _gx_system_current_draw_context;

    /* pick up current display driver */
    display = context -> gx_draw_context_display;

    /* calculate rectangle that bounds the pixelmap */
    _gx_utility_rectangle_define(&bound, x_position, y_position,
                                 (GX_VALUE)(x_position + pixelmap -> gx_pixelmap_width - 1),
                                 (GX_VALUE)(y_position + pixelmap -> gx_pixelmap_height - 1));

    if (rot_cx == -1)
    {
        cx = pixelmap -> gx_pixelmap_width >> 1;
    }
    else
    {
        cx = rot_cx;
    }

    if (rot_cy == -1)
    {
        cy = pixelmap -> gx_pixelmap_height >> 1;
    }
    else
    {
        cy = rot_cy;
    }

    /* calculate rectangle that bounds the rotated pixelmap */
    _gx_canvas_rotated_pixelmap_bound_calculate(&bound, angle, cx, cy);

    /* clip the line bounding box to the dirty rectangle */
    if (!_gx_utility_rectangle_overlap_detect(&bound, &context -> gx_draw_context_dirty, &bound))
    {
        /* nothing to draw, return */
        return GX_SUCCESS;
    }

    /* Range angle to [0, 360). */
    angle = angle % 360;

    if (angle < 0)
    {
        angle += 360;
    }

    if (angle == 0)
    {
        if (!display->gx_display_driver_pixelmap_draw)
        {
            return GX_FAILURE;
        }
    }

    if (pixelmap->gx_pixelmap_flags & GX_PIXELMAP_COMPRESSED)
    {
        return GX_NOT_SUPPORTED;
    }

    /* pickup pointer to correct pixelmap drawing function */
    pmp_function = display -> gx_display_driver_pixelmap_rotate;

    if (!pmp_function)
    {
        /* display driver does not support requested action */
        return GX_FAILURE;
    }

    /* test to determine if the bounding rectangle overlaps the region we are allowed to draw
       into. For each view that overlaps the bounding rectangle, do some drawing.
     */
    view = context -> gx_draw_context_view_head;

    while (view)
    {
        if (!_gx_utility_rectangle_overlap_detect(&view -> gx_view_rectangle, &bound, &clip_rect))
        {
            view = view -> gx_view_next;
            continue;
        }

        /* we have a view into which we can draw the pixelmap, do it */

        /* first, set the context clip rectangle */
        context -> gx_draw_context_clip = &clip_rect;

        if (angle == 0)
        {
            display->gx_display_driver_pixelmap_draw(context, x_position, y_position, pixelmap);
        }
        else
        {
            /* now pass the context and drawing params to driver level function */
            pmp_function(context, x_position, y_position, pixelmap, angle, cx, cy);
        }

        /* go to the next view */
        view = view -> gx_view_next;
    }

    /* Return successful completion.  */
    return(GX_SUCCESS);
}



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			/** Canvas Management (Canvas) */
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			#include "gx_canvas.h"
31
32			/**************************************************************************/
33			/* */
34			/* FUNCTION RELEASE */
35			/* */
36			/* _gx_canvas_rotated_pixelmap_bound_calculate PORTABLE C */
37			/* 6.1 */
38			/* AUTHOR */
39			/* */
40			/* Kenneth Maxwell, Microsoft Corporation */
41			/* */
42			/* DESCRIPTION */
43			/* */
44			/* This function calcuates the bounding rectangle of a rotated */
45			/* pixelmap. */
46			/* */
47			/* INPUT */
48			/* */
49			/* rect Rectangle of source pixelmao. */
50			/* angle Angle of rotation in degrees. */
51			/* rot_cx x-coord of rotating center */
52			/* rot_cy y-coord of rotating center */
53			/* */
54			/* OUTPUT */
55			/* */
56			/* status Completion status */
57			/* */
58			/* CALLS */
59			/* */
60			/* None */
61			/* */
62			/* CALLED BY */
63			/* */
64			/* GUIX Internal Code */
65			/* */
66			/* RELEASE HISTORY */
67			/* */
68			/* DATE NAME DESCRIPTION */
69			/* */
70			/* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
71			/* 09-30-2020 Kenneth Maxwell Modified comment(s), */
72			/* resulting in version 6.1 */
73			/* */
74			/**************************************************************************/
75		17863	static UINT _gx_canvas_rotated_pixelmap_bound_calculate(GX_RECTANGLE *rect, INT angle, INT rot_cx, INT rot_cy)
76			{
77		17863	INT mx[4] = {-1, 1, 1, -1};
78		17863	INT my[4] = {1, 1, -1, -1};
79			INT idxminx;
80			INT idxmaxx;
81			INT idxmaxy;
82			INT srcxres;
83			INT srcyres;
84			INT cosv;
85			INT sinv;
86			INT xres;
87			INT yres;
88			INT width;
89			INT height;
90			INT x;
91			INT y;
92
93		17863	angle %= 360;
94
95	✓✓	17863	if (angle < 0)
96			{
97		359	angle += 360;
98			}
99
100			/* Calculate rectangle width and height. */
101		17863	width = (GX_VALUE)(rect -> gx_rectangle_right - rect -> gx_rectangle_left + 1);
102		17863	height = (GX_VALUE)(rect -> gx_rectangle_bottom - rect -> gx_rectangle_top + 1);
103
104	✓✓	17863	if (angle == 0)
105			{
106		35	return GX_SUCCESS;
107			}
108	✓✓	17828	if (angle == 90)
109			{
110		62	GX_SWAP_VALS(width, height);
111
112		62	rect -> gx_rectangle_left = (GX_VALUE)(rect -> gx_rectangle_left + rot_cx - (width - 1 - rot_cy));
113		62	rect -> gx_rectangle_top = (GX_VALUE)(rect -> gx_rectangle_top + rot_cy - rot_cx);
114			}
115	✓✓	17766	else if (angle == 180)
116			{
117		57	rect -> gx_rectangle_left = (GX_VALUE)(rect -> gx_rectangle_left + rot_cx - (width - 1 - rot_cx));
118		57	rect -> gx_rectangle_top = (GX_VALUE)(rect -> gx_rectangle_top + rot_cy - (height - 1 - rot_cy));
119			}
120	✓✓	17709	else if (angle == 270)
121			{
122		57	GX_SWAP_VALS(width, height);
123		57	rect -> gx_rectangle_left = (GX_VALUE)(rect -> gx_rectangle_left + rot_cx - rot_cy);
124		57	rect -> gx_rectangle_top = (GX_VALUE)(rect -> gx_rectangle_top + rot_cy - (height - 1 - rot_cx));
125			}
126			else
127			{
128		17652	idxminx = (angle / 90) & 0x3;
129		17652	idxmaxx = (idxminx + 2) & 0x3;
130		17652	idxmaxy = (idxminx + 1) & 0x3;
131
132			/* Calculate the source x and y center. */
133		17652	srcxres = width >> 1;
134		17652	srcyres = height >> 1;
135
136		17652	cosv = _gx_utility_math_cos(GX_FIXED_VAL_MAKE(angle));
137		17652	sinv = _gx_utility_math_sin(GX_FIXED_VAL_MAKE(angle));
138
139		17652	xres = mx[idxmaxx] * (srcxres + 2) * cosv - my[idxmaxx] * (srcyres + 2) * sinv;
140		17652	yres = my[idxmaxy] * (srcyres + 2) * cosv + mx[idxmaxy] * (srcxres + 2) * sinv;
141
142		17652	xres = GX_FIXED_VAL_TO_INT(xres);
143		17652	yres = GX_FIXED_VAL_TO_INT(yres);
144
145			/* Calculate destination width and height. */
146		17652	width = (xres << 1);
147		17652	height = (yres << 1);
148
149			/* Calculate the new rotation axis. */
150		17652	x = GX_FIXED_VAL_TO_INT((rot_cx - srcxres) * cosv - (rot_cy - srcyres) * sinv);
151		17652	y = GX_FIXED_VAL_TO_INT((rot_cy - srcyres) * cosv + (rot_cx - srcxres) * sinv);
152
153		17652	x += xres;
154		17652	y += yres;
155
156		17652	rect -> gx_rectangle_left = (GX_VALUE)(rect -> gx_rectangle_left + rot_cx - x);
157		17652	rect -> gx_rectangle_top = (GX_VALUE)(rect -> gx_rectangle_top + rot_cy - y);
158			}
159		17828	rect -> gx_rectangle_right = (GX_VALUE)(rect -> gx_rectangle_left + width - 1);
160		17828	rect -> gx_rectangle_bottom = (GX_VALUE)(rect -> gx_rectangle_top + height - 1);
161
162		17828	return(GX_SUCCESS);
163			}
164
165			/**************************************************************************/
166			/* */
167			/* FUNCTION RELEASE */
168			/* */
169			/* _gx_canvas_pixelmap_rotate PORTABLE C */
170			/* 6.1.7 */
171			/* AUTHOR */
172			/* */
173			/* Kenneth Maxwell, Microsoft Corporation */
174			/* */
175			/* DESCRIPTION */
176			/* */
177			/* This function prepares to draw the specified pixelmap at the */
178			/* requested position. */
179			/* */
180			/* INPUT */
181			/* */
182			/* x_position Top-left x-coord to place */
183			/* pixelmap */
184			/* y_position Top-left y-coord to place */
185			/* pixelmap */
186			/* pixelmap Pointer to actual pixelmap */
187			/* to draw */
188			/* angle The angle to rotate */
189			/* rot_cx x-coord of rotating center, if*/
190			/* -1 is set, default it to */
191			/* image center. */
192			/* rot_cy y-coord of rotationg center. */
193			/* -1 is set, default it to */
194			/* image center. */
195			/* */
196			/* OUTPUT */
197			/* */
198			/* status Completion status */
199			/* */
200			/* CALLS */
201			/* */
202			/* _gx_utility_rectangle_define */
203			/* _gx_utility_rectangle_overlap_detect */
204			/* _gx_canvas_rotated_pixelmap_bound_calculate */
205			/* [gx_display_driver_pixelmap_rotate] */
206			/* */
207			/* CALLED BY */
208			/* */
209			/* Application code */
210			/* */
211			/* RELEASE HISTORY */
212			/* */
213			/* DATE NAME DESCRIPTION */
214			/* */
215			/* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
216			/* 09-30-2020 Kenneth Maxwell Modified comment(s), */
217			/* resulting in version 6.1 */
218			/* 06-02-2021 Kenneth Maxwell Modified comment(s), */
219			/* removed duplicate variable */
220			/* assignment, */
221			/* resulting in version 6.1.7 */
222			/* */
223			/**************************************************************************/
224		17863	UINT _gx_canvas_pixelmap_rotate(GX_VALUE x_position, GX_VALUE y_position, GX_PIXELMAP *pixelmap,
225			INT angle, INT rot_cx, INT rot_cy)
226			{
227			GX_DRAW_CONTEXT *context;
228			GX_DISPLAY *display;
229			GX_RECTANGLE clip_rect;
230			GX_RECTANGLE bound;
231			GX_VIEW *view;
232			VOID (pmp_function)(GX_DRAW_CONTEXT , INT, INT, GX_PIXELMAP *, INT, INT, INT);
233			INT cx;
234			INT cy;
235
236			/* pick up the current drawing context */
237		17863	context = _gx_system_current_draw_context;
238
239			/* pick up current display driver */
240		17863	display = context -> gx_draw_context_display;
241
242			/* calculate rectangle that bounds the pixelmap */
243		17863	_gx_utility_rectangle_define(&bound, x_position, y_position,
244		17863	(GX_VALUE)(x_position + pixelmap -> gx_pixelmap_width - 1),
245		17863	(GX_VALUE)(y_position + pixelmap -> gx_pixelmap_height - 1));
246
247	✓✓	17863	if (rot_cx == -1)
248			{
249		10661	cx = pixelmap -> gx_pixelmap_width >> 1;
250			}
251			else
252			{
253		7202	cx = rot_cx;
254			}
255
256	✓✓	17863	if (rot_cy == -1)
257			{
258		10661	cy = pixelmap -> gx_pixelmap_height >> 1;
259			}
260			else
261			{
262		7202	cy = rot_cy;
263			}
264
265			/* calculate rectangle that bounds the rotated pixelmap */
266		17863	_gx_canvas_rotated_pixelmap_bound_calculate(&bound, angle, cx, cy);
267
268			/* clip the line bounding box to the dirty rectangle */
269	✓✓	17863	if (!_gx_utility_rectangle_overlap_detect(&bound, &context -> gx_draw_context_dirty, &bound))
270			{
271			/* nothing to draw, return */
272		1	return GX_SUCCESS;
273			}
274
275			/* Range angle to [0, 360). */
276		17862	angle = angle % 360;
277
278	✓✓	17862	if (angle < 0)
279			{
280		359	angle += 360;
281			}
282
283	✓✓	17862	if (angle == 0)
284			{
285	✓✓	34	if (!display->gx_display_driver_pixelmap_draw)
286			{
287		1	return GX_FAILURE;
288			}
289			}
290
291	✓✓	17861	if (pixelmap->gx_pixelmap_flags & GX_PIXELMAP_COMPRESSED)
292			{
293		1	return GX_NOT_SUPPORTED;
294			}
295
296			/* pickup pointer to correct pixelmap drawing function */
297		17860	pmp_function = display -> gx_display_driver_pixelmap_rotate;
298
299	✓✓	17860	if (!pmp_function)
300			{
301			/* display driver does not support requested action */
302		1	return GX_FAILURE;
303			}
304
305			/* test to determine if the bounding rectangle overlaps the region we are allowed to draw
306			into. For each view that overlaps the bounding rectangle, do some drawing.
307			*/
308		17859	view = context -> gx_draw_context_view_head;
309
310	✓✓	35719	while (view)
311			{
312	✓✓	17860	if (!_gx_utility_rectangle_overlap_detect(&view -> gx_view_rectangle, &bound, &clip_rect))
313			{
314		2	view = view -> gx_view_next;
315		2	continue;
316			}
317
318			/* we have a view into which we can draw the pixelmap, do it */
319
320			/* first, set the context clip rectangle */
321		17858	context -> gx_draw_context_clip = &clip_rect;
322
323	✓✓	17858	if (angle == 0)
324			{
325		33	display->gx_display_driver_pixelmap_draw(context, x_position, y_position, pixelmap);
326			}
327			else
328			{
329			/* now pass the context and drawing params to driver level function */
330		17825	pmp_function(context, x_position, y_position, pixelmap, angle, cx, cy);
331			}
332
333			/* go to the next view */
334		17858	view = view -> gx_view_next;
335			}
336
337			/* Return successful completion. */
338		17859	return(GX_SUCCESS);
339			}
340