97 lines
3.5 KiB
C++
97 lines
3.5 KiB
C++
//
|
|
// Draw-to-image code for the Fast Light Tool Kit (FLTK).
|
|
//
|
|
// Copyright 1998-2023 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 <FL/platform.H>
|
|
#include "Fl_Wayland_Graphics_Driver.H"
|
|
#include "Fl_Wayland_Window_Driver.H"
|
|
#include "Fl_Wayland_Image_Surface_Driver.H"
|
|
|
|
|
|
Fl_Wayland_Image_Surface_Driver::Fl_Wayland_Image_Surface_Driver(int w, int h, int high_res, Fl_Offscreen off) : Fl_Image_Surface_Driver(w, h, high_res, off) {
|
|
float d = 1;
|
|
if (!off) {
|
|
fl_open_display();
|
|
if (Fl_Wayland_Window_Driver::wld_window) {
|
|
d = Fl_Wayland_Window_Driver::driver(Fl_Wayland_Window_Driver::wld_window->fl_win)->wld_scale();
|
|
}
|
|
d *= fl_graphics_driver->scale();
|
|
if (d != 1 && high_res) {
|
|
w = int(w * d);
|
|
h = int(h * d);
|
|
}
|
|
struct fl_wld_draw_buffer *off_ = (struct fl_wld_draw_buffer*)calloc(1, sizeof(struct fl_wld_draw_buffer));
|
|
offscreen = (Fl_Offscreen)off_;
|
|
Fl_Wayland_Graphics_Driver::cairo_init(off_, w, h,
|
|
cairo_format_stride_for_width(CAIRO_FORMAT_RGB24, w), CAIRO_FORMAT_RGB24);
|
|
}
|
|
driver(new Fl_Wayland_Graphics_Driver());
|
|
if (d != 1 && high_res) driver()->scale(d);
|
|
}
|
|
|
|
|
|
Fl_Wayland_Image_Surface_Driver::~Fl_Wayland_Image_Surface_Driver() {
|
|
if (offscreen && !external_offscreen) {
|
|
cairo_destroy(((struct fl_wld_draw_buffer *)offscreen)->cairo_);
|
|
delete[] ((struct fl_wld_draw_buffer *)offscreen)->buffer;
|
|
free((struct fl_wld_draw_buffer *)offscreen);
|
|
}
|
|
delete driver();
|
|
}
|
|
|
|
void Fl_Wayland_Image_Surface_Driver::set_current() {
|
|
Fl_Surface_Device::set_current();
|
|
((Fl_Wayland_Graphics_Driver*)fl_graphics_driver)->set_cairo(((struct fl_wld_draw_buffer*)offscreen)->cairo_);
|
|
pre_window = Fl_Wayland_Window_Driver::wld_window;
|
|
Fl_Wayland_Window_Driver::wld_window = NULL;
|
|
fl_window = 0;
|
|
}
|
|
|
|
void Fl_Wayland_Image_Surface_Driver::end_current() {
|
|
cairo_surface_t *surf = cairo_get_target(((struct fl_wld_draw_buffer *)offscreen)->cairo_);
|
|
cairo_surface_flush(surf);
|
|
Fl_Wayland_Window_Driver::wld_window = pre_window;
|
|
fl_window = (Window)pre_window;
|
|
Fl_Surface_Device::end_current();
|
|
}
|
|
|
|
void Fl_Wayland_Image_Surface_Driver::translate(int x, int y) {
|
|
((Fl_Wayland_Graphics_Driver*)driver())->ps_translate(x, y);
|
|
}
|
|
|
|
void Fl_Wayland_Image_Surface_Driver::untranslate() {
|
|
((Fl_Wayland_Graphics_Driver*)driver())->ps_untranslate();
|
|
}
|
|
|
|
Fl_RGB_Image* Fl_Wayland_Image_Surface_Driver::image() {
|
|
// Convert depth-4 image in draw_buffer to a depth-3 image while exchanging R and B colors
|
|
int height = ((struct fl_wld_draw_buffer *)offscreen)->data_size / ((struct fl_wld_draw_buffer *)offscreen)->stride;
|
|
uchar *rgb = new uchar[((struct fl_wld_draw_buffer *)offscreen)->width * height * 3];
|
|
uchar *p = rgb;
|
|
uchar *q;
|
|
for (int j = 0; j < height; j++) {
|
|
q = ((struct fl_wld_draw_buffer *)offscreen)->buffer + j*((struct fl_wld_draw_buffer *)offscreen)->stride;
|
|
for (int i = 0; i < ((struct fl_wld_draw_buffer *)offscreen)->width; i++) { // exchange R and B colors, transmit G
|
|
*p = *(q+2);
|
|
*(p+1) = *(q+1);
|
|
*(p+2) = *q;
|
|
p += 3; q += 4;
|
|
}
|
|
}
|
|
Fl_RGB_Image *image = new Fl_RGB_Image(rgb, ((struct fl_wld_draw_buffer *)offscreen)->width, height, 3);
|
|
image->alloc_array = 1;
|
|
return image;
|
|
}
|