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/* Copyright 2016 Pierre Ossman for Cendio AB
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <assert.h>
#include <stdlib.h>
#include <FL/Fl_RGB_Image.H>
#include <FL/x.H>
#include <rdr/Exception.h>
#include "Surface.h"
void Surface::clear(unsigned char r, unsigned char g, unsigned char b, unsigned char a)
{
XRenderColor color;
color.red = (unsigned)r * 65535 / 255 * a / 255;
color.green = (unsigned)g * 65535 / 255 * a / 255;
color.blue = (unsigned)b * 65535 / 255 * a / 255;
color.alpha = (unsigned)a * 65535 / 255;
XRenderFillRectangle(fl_display, PictOpSrc, picture, &color,
0, 0, width(), height());
}
void Surface::draw(int src_x, int src_y, int dst_x, int dst_y,
int dst_w, int dst_h)
{
Picture winPict;
winPict = XRenderCreatePicture(fl_display, fl_window, visFormat, 0, nullptr);
XRenderComposite(fl_display, PictOpSrc, picture, None, winPict,
src_x, src_y, 0, 0, dst_x, dst_y, dst_w, dst_h);
XRenderFreePicture(fl_display, winPict);
}
void Surface::draw(Surface* dst, int src_x, int src_y,
int dst_x, int dst_y, int dst_w, int dst_h)
{
XRenderComposite(fl_display, PictOpSrc, picture, None, dst->picture,
src_x, src_y, 0, 0, dst_x, dst_y, dst_w, dst_h);
}
static Picture alpha_mask(int a)
{
Pixmap pixmap;
XRenderPictFormat* format;
XRenderPictureAttributes rep;
Picture pict;
XRenderColor color;
if (a == 255)
return None;
pixmap = XCreatePixmap(fl_display, XDefaultRootWindow(fl_display),
1, 1, 8);
format = XRenderFindStandardFormat(fl_display, PictStandardA8);
rep.repeat = RepeatNormal;
pict = XRenderCreatePicture(fl_display, pixmap, format, CPRepeat, &rep);
XFreePixmap(fl_display, pixmap);
color.alpha = (unsigned)a * 65535 / 255;
XRenderFillRectangle(fl_display, PictOpSrc, pict, &color,
0, 0, 1, 1);
return pict;
}
void Surface::blend(int src_x, int src_y, int dst_x, int dst_y,
int dst_w, int dst_h, int a)
{
Picture winPict, alpha;
winPict = XRenderCreatePicture(fl_display, fl_window, visFormat, 0, nullptr);
alpha = alpha_mask(a);
XRenderComposite(fl_display, PictOpOver, picture, alpha, winPict,
src_x, src_y, 0, 0, dst_x, dst_y, dst_w, dst_h);
XRenderFreePicture(fl_display, winPict);
if (alpha != None)
XRenderFreePicture(fl_display, alpha);
}
void Surface::blend(Surface* dst, int src_x, int src_y,
int dst_x, int dst_y, int dst_w, int dst_h, int a)
{
Picture alpha;
alpha = alpha_mask(a);
XRenderComposite(fl_display, PictOpOver, picture, alpha, dst->picture,
src_x, src_y, 0, 0, dst_x, dst_y, dst_w, dst_h);
if (alpha != None)
XRenderFreePicture(fl_display, alpha);
}
void Surface::alloc()
{
XRenderPictFormat templ;
XRenderPictFormat* format;
// Might not be open at this point
fl_open_display();
pixmap = XCreatePixmap(fl_display, XDefaultRootWindow(fl_display),
width(), height(), 32);
// Our code assumes a BGRA byte order, regardless of what the endian
// of the machine is or the native byte order of XImage, so make sure
// we find such a format
templ.type = PictTypeDirect;
templ.depth = 32;
if (XImageByteOrder(fl_display) == MSBFirst) {
templ.direct.alpha = 0;
templ.direct.red = 8;
templ.direct.green = 16;
templ.direct.blue = 24;
} else {
templ.direct.alpha = 24;
templ.direct.red = 16;
templ.direct.green = 8;
templ.direct.blue = 0;
}
templ.direct.alphaMask = 0xff;
templ.direct.redMask = 0xff;
templ.direct.greenMask = 0xff;
templ.direct.blueMask = 0xff;
format = XRenderFindFormat(fl_display, PictFormatType | PictFormatDepth |
PictFormatRed | PictFormatRedMask |
PictFormatGreen | PictFormatGreenMask |
PictFormatBlue | PictFormatBlueMask |
PictFormatAlpha | PictFormatAlphaMask,
&templ, 0);
if (!format)
throw rdr::Exception("XRenderFindFormat");
picture = XRenderCreatePicture(fl_display, pixmap, format, 0, nullptr);
visFormat = XRenderFindVisualFormat(fl_display, fl_visual->visual);
}
void Surface::dealloc()
{
XRenderFreePicture(fl_display, picture);
XFreePixmap(fl_display, pixmap);
}
void Surface::update(const Fl_RGB_Image* image)
{
XImage* img;
GC gc;
int x, y;
const unsigned char* in;
unsigned char* out;
assert(image->w() == width());
assert(image->h() == height());
img = XCreateImage(fl_display, (Visual*)CopyFromParent, 32,
ZPixmap, 0, nullptr, width(), height(),
32, 0);
if (!img)
throw rdr::Exception("XCreateImage");
img->data = (char*)malloc(img->bytes_per_line * img->height);
if (!img->data)
throw rdr::Exception("malloc");
// Convert data and pre-multiply alpha
in = (const unsigned char*)image->data()[0];
out = (unsigned char*)img->data;
for (y = 0;y < img->height;y++) {
for (x = 0;x < img->width;x++) {
switch (image->d()) {
case 1:
*out++ = in[0];
*out++ = in[0];
*out++ = in[0];
*out++ = 0xff;
break;
case 2:
*out++ = (unsigned)in[0] * in[1] / 255;
*out++ = (unsigned)in[0] * in[1] / 255;
*out++ = (unsigned)in[0] * in[1] / 255;
*out++ = in[1];
break;
case 3:
*out++ = in[2];
*out++ = in[1];
*out++ = in[0];
*out++ = 0xff;
break;
case 4:
*out++ = (unsigned)in[2] * in[3] / 255;
*out++ = (unsigned)in[1] * in[3] / 255;
*out++ = (unsigned)in[0] * in[3] / 255;
*out++ = in[3];
break;
}
in += image->d();
}
if (image->ld() != 0)
in += image->ld() - image->w() * image->d();
}
gc = XCreateGC(fl_display, pixmap, 0, nullptr);
XPutImage(fl_display, pixmap, gc, img,
0, 0, 0, 0, img->width, img->height);
XFreeGC(fl_display, gc);
XDestroyImage(img);
}
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