"Fossies" - the Fresh Open Source Software Archive  

Source code changes of the file "src/scrot_selection.c" between
scrot-1.6.tar.bz2 and scrot-1.7.tar.bz2

About: scrot (SCReenshOT) is a simple command line screen capture utility using imlib2 to grab and save images.

scrot_selection.c  (scrot-1.6.tar.bz2)	:	scrot_selection.c  (scrot-1.7.tar.bz2)
/* scrot_selection.c		/* scrot_selection.c
Copyright 2020-2021 Daniel T. Borelli <daltomi@disroot.org>		Copyright 2020-2021 Daniel T. Borelli <danieltborelli@gmail.com>
Copyright 2021 Martin C <martincation@protonmail.com>		Copyright 2021 Martin C <martincation@protonmail.com>
		Copyright 2021 Peter Wu <peterwu@hotmail.com>
		Copyright 2021 Wilson Smith <01wsmith+gh@gmail.com>
Permission is hereby granted, free of charge, to any person obtaining a copy		Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to		of this software and associated documentation files (the "Software"), to
deal in the Software without restriction, including without limitation the		deal in the Software without restriction, including without limitation the
rights to use, copy, modify, merge, publish, distribute, sublicense, and/or		rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
sell copies of the Software, and to permit persons to whom the Software is		sell copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:		furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in		The above copyright notice and this permission notice shall be included in
all copies of the Software and its documentation and acknowledgment shall be		all copies of the Software and its documentation and acknowledgment shall be
skipping to change at line 36		skipping to change at line 38
/*		/*
This file is part of the scrot project.		This file is part of the scrot project.
Part of the code comes from the main.c file and maintains its authorship.		Part of the code comes from the main.c file and maintains its authorship.
*/		*/
#include "scrot.h"		#include "scrot.h"
#include "selection_classic.h"		#include "selection_classic.h"
#include "selection_edge.h"		#include "selection_edge.h"
struct selection_t** selection_get(void)		struct Selection** selectionGet(void)
{		{
static struct selection_t* sel = NULL;		static struct Selection* sel = NULL;
return &sel;		return &sel;
}		}
static void selection_allocate(void)		static void selectionAllocate(void)
{		{
struct selection_t** sel = selection_get();		struct Selection** sel = selectionGet();
*sel = calloc(1, sizeof(struct selection_t));		*sel = calloc(1, sizeof(**sel));
}		}
static void selection_deallocate(void)		static void selectionDeallocate(void)
{		{
struct selection_t** sel = selection_get();		struct Selection** sel = selectionGet();
free(*sel);		free(*sel);
*sel = NULL;		*sel = NULL;
}		}
static void create_cursors(void)		static void createCursors(void)
{		{
struct selection_t *const sel = *selection_get();		struct Selection* const sel = *selectionGet();
assert(sel != NULL);		assert(sel != NULL);
sel->cur_cross = XCreateFontCursor(disp, XC_cross);		if (opt.selection.mode == SELECTION_MODE_CAPTURE)
sel->cur_angle_ne = XCreateFontCursor(disp, XC_ur_angle);		sel->curCross = XCreateFontCursor(disp, XC_cross);
sel->cur_angle_nw = XCreateFontCursor(disp, XC_ul_angle);		else if (opt.selection.mode == SELECTION_MODE_HIDE)
sel->cur_angle_se = XCreateFontCursor(disp, XC_lr_angle);		sel->curCross = XCreateFontCursor(disp, XC_spraycan);
sel->cur_angle_sw = XCreateFontCursor(disp, XC_ll_angle);		else if (opt.selection.mode == SELECTION_MODE_BLUR)
		sel->curCross = XCreateFontCursor(disp, XC_box_spiral);
		else // SELECTION_MODE_HOLE
		sel->curCross = XCreateFontCursor(disp, XC_target);
		sel->curAngleNE = XCreateFontCursor(disp, XC_ur_angle);
		sel->curAngleNW = XCreateFontCursor(disp, XC_ul_angle);
		sel->curAngleSE = XCreateFontCursor(disp, XC_lr_angle);
		sel->curAngleSW = XCreateFontCursor(disp, XC_ll_angle);
}		}
static void free_cursors(void)		static void freeCursors(void)
{		{
struct selection_t *const sel = *selection_get();		struct Selection* const sel = *selectionGet();
assert(sel != NULL);		assert(sel != NULL);
XFreeCursor(disp, sel->cur_cross);		XFreeCursor(disp, sel->curCross);
XFreeCursor(disp, sel->cur_angle_ne);		XFreeCursor(disp, sel->curAngleNE);
XFreeCursor(disp, sel->cur_angle_nw);		XFreeCursor(disp, sel->curAngleNW);
XFreeCursor(disp, sel->cur_angle_se);		XFreeCursor(disp, sel->curAngleSE);
XFreeCursor(disp, sel->cur_angle_sw);		XFreeCursor(disp, sel->curAngleSW);
}		}
void selection_calculate_rect(int x0, int y0, int x1, int y1)		void selectionCalculateRect(int x0, int y0, int x1, int y1)
{		{
struct selection_rect_t* const rect = scrot_selection_get_rect();		struct SelectionRect* const rect = scrotSelectionGetRect();
rect->x = x0;		rect->x = x0;
rect->y = y0;		rect->y = y0;
rect->w = x1 - x0;		rect->w = x1 - x0;
rect->h = y1 - y0;		rect->h = y1 - y0;
if (rect->w == 0) rect->w++;		if (rect->w == 0)
		rect->w++;
if (rect->h == 0) rect->h++;		if (rect->h == 0)
		rect->h++;
if (rect->w < 0) {		if (rect->w < 0) {
rect->x += rect->w;		rect->x += rect->w;
rect->w = 0 - rect->w;		rect->w = 0 - rect->w;
}		}
if (rect->h < 0) {		if (rect->h < 0) {
rect->y += rect->h;		rect->y += rect->h;
rect->h = 0 - rect->h;		rect->h = 0 - rect->h;
}		}
}		}
void scrot_selection_create(void)		void scrotSelectionCreate(void)
{		{
selection_allocate();		selectionAllocate();
struct selection_t *const sel = *selection_get();		struct Selection* const sel = *selectionGet();
assert(sel != NULL);		assert(sel != NULL);
create_cursors();		createCursors();
if (0 == strncmp(opt.line_mode, LINE_MODE_CLASSIC, LINE_MODE_CLASSIC_LEN)) {		if (!strncmp(opt.lineMode, LINE_MODE_S_CLASSIC, LINE_MODE_L_CLASSIC)) {
sel->create = selection_classic_create;		sel->create = selectionClassicCreate;
sel->draw = selection_classic_draw;		sel->draw = selectionClassicDraw;
sel->motion_draw = selection_classic_motion_draw;		sel->motionDraw = selectionClassicMotionDraw;
sel->destroy = selection_classic_destroy;		sel->destroy = selectionClassicDestroy;
} else if (0 == strncmp(opt.line_mode, LINE_MODE_EDGE, LINE_MODE_EDGE_LEN))		} else if (!strncmp(opt.lineMode, LINE_MODE_S_EDGE, LINE_MODE_L_EDGE)) {
{		sel->create = selectionEdgeCreate;
sel->create = selection_edge_create;		sel->draw = selectionEdgeDraw;
sel->draw = selection_edge_draw;		sel->motionDraw = selectionEdgeMotionDraw;
sel->motion_draw = selection_edge_motion_draw;		sel->destroy = selectionEdgeDestroy;
sel->destroy = selection_edge_destroy;
} else {		} else {
// It never happened, fix the options.c file		// It never happened, fix the options.c file
assert(0);		assert(0);
}		}
sel->create();		sel->create();
unsigned int const EVENT_MASK = ButtonMotionMask | ButtonPressMask | ButtonR eleaseMask;		unsigned int const EVENT_MASK = ButtonMotionMask | ButtonPressMask | ButtonR eleaseMask;
if ((XGrabPointer (disp, root, False, EVENT_MASK, GrabModeAsync,		if ((XGrabPointer(disp, root, False, EVENT_MASK, GrabModeAsync,
GrabModeAsync, root, sel->cur_cross, CurrentTime) != GrabSuccess)) {		GrabModeAsync, root, sel->curCross, CurrentTime)
fprintf(stderr, "couldn't grab pointer\n");		!= GrabSuccess)) {
scrot_selection_destroy();		scrotSelectionDestroy();
exit(EXIT_FAILURE);		errx(EXIT_FAILURE, "couldn't grab pointer");
}		}
}		}
void scrot_selection_destroy(void)		void scrotSelectionDestroy(void)
{		{
struct selection_t *const sel = *selection_get();		struct Selection* const sel = *selectionGet();
XUngrabPointer(disp, CurrentTime);		XUngrabPointer(disp, CurrentTime);
free_cursors();		freeCursors();
XSync(disp, True);		XSync(disp, True);
sel->destroy();		sel->destroy();
selection_deallocate();		selectionDeallocate();
}		}
void scrot_selection_draw(void)		void scrotSelectionDraw(void)
{		{
struct selection_t const *const sel = *selection_get();		struct Selection const* const sel = *selectionGet();
sel->draw();		sel->draw();
}		}
void scrot_selection_motion_draw(int x0, int y0, int x1, int y1)		void scrotSelectionMotionDraw(int x0, int y0, int x1, int y1)
{		{
struct selection_t const *const sel = *selection_get();		struct Selection const* const sel = *selectionGet();
unsigned int const EVENT_MASK = ButtonMotionMask | ButtonReleaseMask;		unsigned int const EVENT_MASK = ButtonMotionMask | ButtonReleaseMask;
Cursor cursor = None;		Cursor cursor = None;
if (x1 > x0 && y1 > y0) {		if (x1 > x0 && y1 > y0)
cursor = sel->cur_angle_se;		cursor = sel->curAngleSE;
} else if (x1 > x0) {		else if (x1 > x0)
cursor = sel->cur_angle_ne;		cursor = sel->curAngleNE;
} else if (y1 > y0) {		else if (y1 > y0)
cursor = sel->cur_angle_sw;		cursor = sel->curAngleSW;
		else
		cursor = sel->curAngleNW;
		XChangeActivePointerGrab(disp, EVENT_MASK, cursor, CurrentTime);
		sel->motionDraw(x0, y0, x1, y1);
		}
		struct SelectionRect* scrotSelectionGetRect(void)
		{
		return &(*selectionGet())->rect;
		}
		Status scrotSelectionCreateNamedColor(char const* nameColor, XColor* color)
		{
		assert(nameColor != NULL);
		assert(color != NULL);
		return XAllocNamedColor(disp, XDefaultColormap(disp, DefaultScreen(disp)),
		nameColor, color, &(XColor) {});
		}
		void scrotSelectionGetLineColor(XColor* color)
		{
		scrotSelectionSetDefaultColorLine();
		Status const ret = scrotSelectionCreateNamedColor(opt.lineColor, color);
		if (!ret) {
		scrotSelectionDestroy();
		errx(EXIT_FAILURE, "Error allocate color:%s", strerror(BadColor));
		}
		}
		void scrotSelectionSetDefaultColorLine(void)
		{
		if (!opt.lineColor)
		opt.lineColor = "gray";
		}
		bool scrotSelectionGetUserSel(struct SelectionRect* selectionRect)
		{
		static int xfd = 0;
		static int fdSize = 0;
		XEvent ev;
		fd_set fdSet;
		int count = 0, done = 0;
		int rx = 0, ry = 0, rw = 0, rh = 0, isButtonPressed = 0;
		Window target = None;
		Status ret;
		scrotSelectionCreate();
		xfd = ConnectionNumber(disp);
		fdSize = xfd + 1;
		ret = XGrabKeyboard(disp, root, False, GrabModeAsync, GrabModeAsync, Current
		Time);
		if (ret == AlreadyGrabbed) {
		int attempts = 20;
		struct timespec delay = { 0, 50 * 1000L * 1000L };
		do {
		nanosleep(&delay, NULL);
		ret = XGrabKeyboard(disp, root, False, GrabModeAsync, GrabModeAsync,
		CurrentTime);
		} while (--attempts > 0 && ret == AlreadyGrabbed);
		}
		if (ret != GrabSuccess) {
		scrotSelectionDestroy();
		errx(EXIT_FAILURE, "failed to grab keyboard");
		}
		while (1) {
		/* Handle events here */
		while (!done && XPending(disp)) {
		XNextEvent(disp, &ev);
		switch (ev.type) {
		case MotionNotify:
		if (isButtonPressed)
		scrotSelectionMotionDraw(rx, ry, ev.xbutton.x, ev.xbutton.y)
		;
		break;
		case ButtonPress:
		isButtonPressed = 1;
		rx = ev.xbutton.x;
		ry = ev.xbutton.y;
		target = scrotGetWindow(disp, ev.xbutton.subwindow, ev.xbutton.x
		, ev.xbutton.y);
		if (target == None)
		target = root;
		break;
		case ButtonRelease:
		done = 1;
		break;
		case KeyPress:
		{
		KeySym* keysym = NULL;
		int keycode; /*dummy*/
		keysym = XGetKeyboardMapping(disp, ev.xkey.keycode, 1, &keycode)
		;
		if (!keysym)
		break;
		if (!isButtonPressed) {
		key_abort_shot:
		if (!opt.ignoreKeyboard || *keysym == XK_Escape) {
		warnx("Key was pressed, aborting shot");
		done = 2;
		}
		XFree(keysym);
		break;
		}
		switch (*keysym) {
		case XK_Right:
		if (++rx > scr->width)
		rx = scr->width;
		break;
		case XK_Left:
		if (--rx < 0)
		rx = 0;
		break;
		case XK_Down:
		if (++ry > scr->height)
		ry = scr->height;
		break;
		case XK_Up:
		if (--ry < 0)
		ry = 0;
		break;
		default:
		goto key_abort_shot;
		}
		XFree(keysym);
		scrotSelectionMotionDraw(rx, ry, ev.xbutton.x, ev.xbutton.y);
		break;
		}
		case KeyRelease:
		/* ignore */
		break;
		default:
		break;
		}
		}
		if (done)
		break;
		/* now block some */
		FD_ZERO(&fdSet);
		FD_SET(xfd, &fdSet);
		errno = 0;
		count = select(fdSize, &fdSet, NULL, NULL, NULL);
		if ((count < 0)
		&& ((errno == ENOMEM) || (errno == EINVAL) || (errno == EBADF))) {
		scrotSelectionDestroy();
		errx(EXIT_FAILURE, "Connection to X display lost");
		}
		}
		scrotSelectionDraw();
		XUngrabKeyboard(disp, CurrentTime);
		bool const isAreaSelect = (scrotSelectionGetRect()->w > 5);
		scrotSelectionDestroy();
		if (done == 2)
		return false;
		if (isAreaSelect) {
		/* If a rect has been drawn, it's an area selection */
		rw = ev.xbutton.x - rx;
		rh = ev.xbutton.y - ry;
		if ((ev.xbutton.x + 1) == WidthOfScreen(scr))
		++rw;
		if ((ev.xbutton.y + 1) == HeightOfScreen(scr))
		++rh;
		if (rw < 0) {
		rx += rw;
		rw = 0 - rw;
		}
		if (rh < 0) {
		ry += rh;
		rh = 0 - rh;
		}
		// Not record pointer if there is a selection area because it is busy on
		that,
		// unless the delay option is used.
		if (opt.delay == 0)
		opt.pointer = 0;
} else {		} else {
cursor = sel->cur_angle_nw;		/* else it's a window click */
		if (!scrotGetGeometry(target, &rx, &ry, &rw, &rh))
		return false;
}		}
XChangeActivePointerGrab(disp, EVENT_MASK, cursor, CurrentTime);		scrotNiceClip(&rx, &ry, &rw, &rh);
sel->motion_draw(x0, y0, x1, y1);
		if (!opt.silent)
		XBell(disp, 0);
		selectionRect->x = rx;
		selectionRect->y = ry;
		selectionRect->w = rw;
		selectionRect->h = rh;
		return true;
		}
		static void changeImageOpacity(Imlib_Image image, int const opacity)
		{
		#define PIXEL_ARGB(a, r, g, b) ((a) << 24) | ((r) << 16) | ((g) << 8) | (b)
		#define PIXEL_A(argb) (((argb) >> 24) & 0xff)
		#define PIXEL_R(argb) (((argb) >> 16) & 0xff)
		#define PIXEL_G(argb) (((argb) >> 8) & 0xff)
		#define PIXEL_B(argb) (((argb) ) & 0xff)
		imlib_context_set_image(image);
		int const w = imlib_image_get_width();
		int const h = imlib_image_get_height();
		DATA32* data = imlib_image_get_data();
		DATA32* end = data + (h * w);
		for (DATA32* pixel = data; pixel != end; ++pixel) {
		DATA8 const a = PIXEL_A(*pixel) * opacity / 255;
		DATA8 const r = PIXEL_R(*pixel);
		DATA8 const g = PIXEL_G(*pixel);
		DATA8 const b = PIXEL_B(*pixel);
		*pixel = (DATA32)PIXEL_ARGB(a, r, g, b);
		}
		imlib_image_put_back_data(data);
		}
		static Imlib_Image loadImage(char const* const fileName, int const opacity)
		{
		Imlib_Image image = imlib_load_image(fileName);
		if (!image) {
		errx(EXIT_FAILURE, "option --select: Failed to load image:%s",
		fileName);
		}
		imlib_context_set_image(image);
		if (imlib_image_has_alpha() == 0) {
		warnx("Warning, ignoring the opacity parameter because the image '%s'"
		" has no alpha channel, it will be drawn fully opaque.", fileName);
		return image;
		}
		if (opacity == 255) {
		// Do nothing if a totally opaque image is expected.
		return image;
		}
		changeImageOpacity(image, opacity);
		return image;
}		}
struct selection_rect_t* scrot_selection_get_rect(void)		Imlib_Image scrotSelectionSelectMode(void)
{		{
return &(*selection_get())->rect;		struct SelectionRect rect0, rect1;
		unsigned int const oldMode = opt.selection.mode;
		opt.selection.mode = SELECTION_MODE_CAPTURE;
		if (!scrotSelectionGetUserSel(&rect0))
		return NULL;
		opt.selection.mode = oldMode;
		if (opt.selection.mode & SELECTION_MODE_NOT_CAPTURE)
		if (!scrotSelectionGetUserSel(&rect1))
		return NULL;
		scrotDoDelay();
		Imlib_Image capture = imlib_create_image_from_drawable(0, rect0.x, rect0.y,
		rect0.w, rect0.h, 1);
		if (opt.pointer)
		scrotGrabMousePointer(capture, rect0.x, rect0.y);
		if (opt.selection.mode == SELECTION_MODE_CAPTURE)
		return capture;
		XColor color;
		scrotSelectionGetLineColor(&color);
		int const x = rect1.x - rect0.x;
		int const y = rect1.y - rect0.y;
		int const opacity = optionsParseRequireRange(opt.lineOpacity,
		SELECTION_OPACITY_MIN, SELECTION_OPACITY_MAX);
		imlib_context_set_image(capture);
		switch(opt.selection.mode) {
		case SELECTION_MODE_HOLE:
		if (opacity > 0) {
		Imlib_Image hole = imlib_clone_image();
		imlib_context_set_color(color.red, color.green, color.blue, opacity)
		;
		imlib_image_fill_rectangle(0, 0, rect0.w, rect0.h);
		imlib_blend_image_onto_image(hole, 0, x, y, rect1.w, rect1.h, x, y,
		rect1.w, rect1.h);
		imlib_context_set_image(hole);
		imlib_free_image_and_decache();
		}
		break;
		case SELECTION_MODE_HIDE:
		{
		char* const fileName = opt.selection.paramStr;
		if (fileName) {
		if (opacity > 0) {
		Imlib_Image hide = loadImage(fileName, opacity);
		imlib_context_set_image(hide);
		int const w = imlib_image_get_width();
		int const h = imlib_image_get_height();
		imlib_context_set_image(capture);
		imlib_blend_image_onto_image(hide, 0, 0, 0, w, h, x, y, rect1.w,
		rect1.h);
		imlib_context_set_image(hide);
		imlib_free_image_and_decache();
		}
		free(fileName);
		} else {
		imlib_context_set_color(color.red, color.green, color.blue, opacity)
		;
		imlib_image_fill_rectangle(x, y, rect1.w, rect1.h);
		}
		break;
		}
		case SELECTION_MODE_BLUR:
		{
		int const amountBlur = opt.selection.paramNum;
		Imlib_Image blur = imlib_clone_image();
		imlib_context_set_image(blur);
		imlib_image_blur(amountBlur);
		imlib_context_set_image(capture);
		imlib_blend_image_onto_image(blur, 0, x, y, rect1.w, rect1.h, x, y, rect
		1.w, rect1.h);
		imlib_context_set_image(blur);
		imlib_free_image_and_decache();
		break;
		}
		default:
		assert(0);
		}
		return capture;
}		}
End of changes. 39 change blocks.
69 lines changed or deleted		427 lines changed or added

---