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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.
*/
#include <assert.h>
#include <ApplicationServices/ApplicationServices.h>
#include <FL/Fl_RGB_Image.H>
#include <FL/Fl_Window.H>
#include <FL/x.H>
#include <rdr/Exception.h>
#include "Surface.h"
static void render(CGContextRef gc, CGImageRef image,
int src_x, int src_y, int src_w, int src_h,
int x, int y, int w, int h)
{
CGRect rect;
CGContextSaveGState(gc);
// We have to use clipping to partially display an image
rect.origin.x = x;
rect.origin.y = y;
rect.size.width = w;
rect.size.height = h;
CGContextClipToRect(gc, rect);
rect.origin.x = x - src_x;
rect.origin.y = y - src_y;
rect.size.width = src_w;
rect.size.height = src_h;
CGContextDrawImage(gc, rect, image);
CGContextRestoreGState(gc);
}
void Surface::clear(unsigned char r, unsigned char g, unsigned char b, unsigned char a)
{
unsigned char* out;
int x, y;
r = (unsigned)r * a / 255;
g = (unsigned)g * a / 255;
b = (unsigned)b * a / 255;
out = data;
for (y = 0;y < width();y++) {
for (x = 0;x < height();x++) {
*out++ = b;
*out++ = g;
*out++ = r;
*out++ = a;
}
}
}
void Surface::draw(int src_x, int src_y, int x, int y, int w, int h)
{
CGContextSaveGState(fl_gc);
// Reset the transformation matrix back to the default identity
// matrix as otherwise we get a massive performance hit
CGContextConcatCTM(fl_gc, CGAffineTransformInvert(CGContextGetCTM(fl_gc)));
// macOS Coordinates are from bottom left, not top left
src_y = height() - (src_y + h);
y = Fl_Window::current()->h() - (y + h);
render(fl_gc, image, src_x, src_y, width(), height(), x, y, w, h);
CGContextRestoreGState(fl_gc);
}
void Surface::draw(Surface* dst, int src_x, int src_y, int x, int y, int w, int h)
{
CGColorSpaceRef lut;
CGContextRef bitmap;
lut = CGDisplayCopyColorSpace(kCGDirectMainDisplay);
if (!lut) {
lut = CGColorSpaceCreateDeviceRGB();
if (!lut)
throw rdr::Exception("CGColorSpaceCreateDeviceRGB");
}
bitmap = CGBitmapContextCreate(dst->data, dst->width(),
dst->height(), 8, dst->width()*4, lut,
kCGImageAlphaNoneSkipFirst | kCGBitmapByteOrder32Little);
CGColorSpaceRelease(lut);
if (!bitmap)
throw rdr::Exception("CGBitmapContextCreate");
// macOS Coordinates are from bottom left, not top left
src_y = height() - (src_y + h);
y = dst->height() - (y + h);
render(bitmap, image, src_x, src_y, width(), height(), x, y, w, h);
CGContextRelease(bitmap);
}
void Surface::alloc()
{
CGColorSpaceRef lut;
CGDataProviderRef provider;
data = new unsigned char[width() * height() * 4];
lut = CGDisplayCopyColorSpace(kCGDirectMainDisplay);
if (!lut) {
lut = CGColorSpaceCreateDeviceRGB();
if (!lut)
throw rdr::Exception("CGColorSpaceCreateDeviceRGB");
}
provider = CGDataProviderCreateWithData(NULL, data,
width() * height() * 4, NULL);
if (!provider)
throw rdr::Exception("CGDataProviderCreateWithData");
image = CGImageCreate(width(), height(), 8, 32, width() * 4, lut,
kCGImageAlphaNoneSkipFirst | kCGBitmapByteOrder32Little,
provider, NULL, false, kCGRenderingIntentDefault);
CGColorSpaceRelease(lut);
CGDataProviderRelease(provider);
if (!image)
throw rdr::Exception("CGImageCreate");
}
void Surface::dealloc()
{
CGImageRelease(image);
delete [] data;
}
void Surface::update(const Fl_RGB_Image* image)
{
int x, y;
const unsigned char* in;
unsigned char* out;
assert(image->w() == width());
assert(image->h() == height());
// Convert data and pre-multiply alpha
in = (const unsigned char*)image->data()[0];
out = data;
for (y = 0;y < image->h();y++) {
for (x = 0;x < image->w();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();
}
}
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