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//
// Rectangle drawing routines for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2022 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file. If this
// file is missing or damaged, see the license at:
//
// https://www.fltk.org/COPYING.php
//
// Please see the following page on how to report bugs and issues:
//
// https://www.fltk.org/bugs.php
//
#include <config.h>
#include "Fl_Xlib_Graphics_Driver.H"
#include "Fl_Font.H"
#include <FL/fl_draw.H>
#include <FL/platform.H>
#include <string.h>
#include <stdlib.h>
#if !USE_XFT
extern char *fl_get_font_xfld(int fnum, int size);
#endif
GC Fl_Xlib_Graphics_Driver::gc_ = NULL;
int Fl_Xlib_Graphics_Driver::fl_overlay = 0;
/* Reference to the current graphics context
For back-compatibility only. The preferred procedure to get this pointer is
Fl_Surface_Device::surface()->driver()->gc().
*/
GC fl_gc = 0;
GC fl_x11_gc() { return fl_gc; }
Fl_Xlib_Graphics_Driver::Fl_Xlib_Graphics_Driver(void) {
mask_bitmap_ = NULL;
short_point = NULL;
#if USE_PANGO
Fl_Graphics_Driver::font(0, 0);
#endif
offset_x_ = 0; offset_y_ = 0;
depth_ = 0;
clip_max_ = 32760; // clipping limit (2**15 - 8)
}
Fl_Xlib_Graphics_Driver::~Fl_Xlib_Graphics_Driver() {
if (short_point) free(short_point);
}
void Fl_Xlib_Graphics_Driver::gc(void *value) {
gc_ = (GC)value;
fl_gc = gc_;
}
void Fl_Xlib_Graphics_Driver::scale(float f) {
#if USE_XFT
if (f != scale()) {
size_ = 0;
Fl_Graphics_Driver::scale(f);
//fprintf(stderr, "scale=%.2f\n", scale_);
line_style(FL_SOLID); // scale also default line width
}
#endif
}
void Fl_Xlib_Graphics_Driver::copy_offscreen(int x, int y, int w, int h, Fl_Offscreen pixmap, int srcx, int srcy) {
XCopyArea(fl_display, (Pixmap)pixmap, fl_window, gc_, srcx*scale(), srcy*scale(), w*scale(), h*scale(), (x+offset_x_)*scale(), (y+offset_y_)*scale());
}
void Fl_Xlib_Graphics_Driver::add_rectangle_to_region(Fl_Region r, int X, int Y, int W, int H) {
XRectangle R;
R.x = X; R.y = Y; R.width = W; R.height = H;
XUnionRectWithRegion(&R, (Region)r, (Region)r);
}
void Fl_Xlib_Graphics_Driver::transformed_vertex0(float fx, float fy) {
short x = short(fx), y = short(fy);
if (!n || x != short_point[n-1].x || y != short_point[n-1].y) {
if (n >= p_size) {
p_size = short_point ? 2*p_size : 16;
short_point = (XPoint*)realloc((void*)short_point, p_size*sizeof(*short_point));
}
short_point[n].x = x ;
short_point[n].y = y ;
n++;
}
}
void Fl_Xlib_Graphics_Driver::fixloop() { // remove equal points from closed path
while (n>2 && short_point[n-1].x == short_point[0].x && short_point[n-1].y == short_point[0].y) n--;
}
#if !USE_XFT
unsigned Fl_Xlib_Graphics_Driver::font_desc_size() {
return (unsigned)sizeof(Fl_Xlib_Fontdesc);
}
#endif
const char *Fl_Xlib_Graphics_Driver::font_name(int num) {
#if USE_XFT
return fl_fonts[num].name;
#else
return ((Fl_Xlib_Fontdesc*)fl_fonts)[num].name;
#endif
}
void Fl_Xlib_Graphics_Driver::font_name(int num, const char *name) {
#if USE_XFT
# if USE_PANGO
init_built_in_fonts();
if (pfd_array_length > num && pfd_array[num]) {
pango_font_description_free(pfd_array[num]);
pfd_array[num] = NULL;
}
# endif
Fl_Fontdesc *s = fl_fonts + num;
#else
Fl_Xlib_Fontdesc *s = ((Fl_Xlib_Fontdesc*)fl_fonts) + num;
#endif
if (s->name) {
if (!strcmp(s->name, name)) {s->name = name; return;}
#if !USE_XFT
if (s->xlist && s->n >= 0) XFreeFontNames(s->xlist);
#endif
for (Fl_Font_Descriptor* f = s->first; f;) {
Fl_Font_Descriptor* n = f->next; delete f; f = n;
}
s->first = 0;
}
s->name = name;
s->fontname[0] = 0;
#if !USE_XFT
s->xlist = 0;
#endif
s->first = 0;
}
Fl_Region Fl_Xlib_Graphics_Driver::scale_clip(float f) {
Region r = (Region)rstack[rstackptr];
if (r == 0 || (f == 1 && offset_x_ == 0 && offset_y_ == 0) ) return 0;
Region r2 = XCreateRegion();
for (int i = 0; i < r->numRects; i++) {
int x = floor(r->rects[i].x1 + offset_x_, f);
int y = floor(r->rects[i].y1 + offset_y_, f);
int w = floor((r->rects[i].x2 + offset_x_) , f) - x;
int h = floor((r->rects[i].y2 + offset_y_) , f) - y;
Region R = (Region)XRectangleRegion(x, y, w, h);
XUnionRegion(R, r2, r2);
::XDestroyRegion(R);
}
rstack[rstackptr] = r2;
return r;
}
void Fl_Xlib_Graphics_Driver::translate_all(int dx, int dy) { // reversibly adds dx,dy to the offset between user and graphical coordinates
if (depth_ < FL_XLIB_GRAPHICS_TRANSLATION_STACK_SIZE) {
stack_x_[depth_] = offset_x_;
stack_y_[depth_] = offset_y_;
depth_++;
} else {
Fl::warning("%s: translate stack overflow!", "Fl_Xlib_Graphics_Driver");
}
offset_x_ += dx;
offset_y_ += dy;
push_matrix();
translate(dx, dy);
}
void Fl_Xlib_Graphics_Driver::untranslate_all() { // undoes previous translate_all()
if (depth_ > 0) depth_--;
offset_x_ = stack_x_[depth_];
offset_y_ = stack_y_[depth_];
pop_matrix();
}
void Fl_Xlib_Graphics_Driver::set_current_() {
restore_clip();
}
#if USE_PANGO
int Fl_Xlib_Graphics_Driver::pfd_array_length = FL_FREE_FONT;
PangoFontDescription **Fl_Xlib_Graphics_Driver::pfd_array = (PangoFontDescription**)calloc(pfd_array_length, sizeof(PangoFontDescription*));
#endif
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