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// Copyright (C) 1999-2018
// Smithsonian Astrophysical Observatory, Cambridge, MA, USA
// For conditions of distribution and use, see copyright notice in "copyright"
#include "truecolor24.h"
#include "util.h"
TrueColor24::TrueColor24(Visual* visual)
{
#if !(_WIN32 || MAC_OSX_TK)
ax_ = 0;
rx_ = visual->red_mask;
gx_ = visual->green_mask;
bx_ = visual->blue_mask;
#endif
#if MAC_OSX_TK
// macos masks are plain wrong
ax_ = 0xFF000000;
rx_ = 0x00FF0000;
gx_ = 0x0000FF00;
bx_ = 0x000000FF;
// *** waj ***
// rx_ = 0x000000FF;
// gx_ = 0x0000FF00;
// bx_ = 0x00FF0000;
#endif
#if _WIN32
// windows masks are plain wrong
ax_ = 0;
rx_ = 0x00FF0000;
gx_ = 0x0000FF00;
bx_ = 0x000000FF;
#endif
rs_ = decodeMask((unsigned long)rx_);
gs_ = decodeMask((unsigned long)gx_);
bs_ = decodeMask((unsigned long)bx_);
as_ = decodeMask((unsigned long)ax_);
}
int TrueColor24::decodeMask(unsigned long mask)
{
switch (mask) {
case 0:
return 0;
case 0xff:
return 0;
case 0xff00:
return 8;
case 0xff0000:
return 16;
case 0xff000000:
return 24;
}
return 0;
}
void TrueColor24::encodeTrueColor(XColor* src, char* dest, XImage* ximage)
{
if (!ximage)
return;
switch (ximage->bits_per_pixel) {
case 24:
encodeTrueColor24(src, dest, ximage);
break;
case 32:
encodeTrueColor32(src, dest, ximage);
break;
}
}
void TrueColor24::decodeTrueColor(char* src, XColor* dest, XImage* ximage)
{
if (!ximage)
return;
switch (ximage->bits_per_pixel) {
case 24:
decodeTrueColor24(src, dest, ximage);
break;
case 32:
decodeTrueColor32(src, dest, ximage);
break;
}
}
void TrueColor24::encodeTrueColor24(XColor* src, char* dest, XImage* ximage)
{
int msb = ximage->byte_order;
unsigned int r = (unsigned char)src->red;
unsigned int g = (unsigned char)src->green;
unsigned int b = (unsigned char)src->blue;
unsigned int v = 0;
v |= r << rs_;
v |= g << gs_;
v |= b << bs_;
if ((!msb && lsb()) || (msb && !lsb()))
memcpy(dest, &v, 3);
else {
unsigned char* rr = (unsigned char*)(&v);
*(dest+0) = *(rr+3);
*(dest+1) = *(rr+2);
*(dest+2) = *(rr+1);
}
}
void TrueColor24::decodeTrueColor24(char* src, XColor* dest, XImage* ximage)
{
int msb = ximage->byte_order;
unsigned int v = 0;
if ((!msb && lsb()) || (msb && !lsb()))
memcpy(&v, src, 3);
else {
unsigned char* rr = (unsigned char*)(&v);
*(rr+3) = *(src+0);
*(rr+2) = *(src+1);
*(rr+1) = *(src+2);
}
dest->red = (unsigned short)((v & rx_) >> rs_);
dest->green = (unsigned short)((v & gx_) >> gs_);
dest->blue = (unsigned short)((v & bx_) >> bs_);
}
void TrueColor24::encodeTrueColor32(XColor* src, char* dest, XImage* ximage)
{
int msb = ximage->byte_order;
unsigned int r = (unsigned char)src->red;
unsigned int g = (unsigned char)src->green;
unsigned int b = (unsigned char)src->blue;
unsigned int v = 0;
#ifdef MAC_OSX_TK
unsigned int a = 0xff;
v |= a << as_;
#endif
v |= r << rs_;
v |= g << gs_;
v |= b << bs_;
if ((!msb && lsb()) || (msb && !lsb()))
memcpy(dest, &v, 4);
else {
unsigned char* rr = (unsigned char*)(&v);
*(dest+0) = *(rr+3);
*(dest+1) = *(rr+2);
*(dest+2) = *(rr+1);
*(dest+3) = *(rr+0);
}
}
void TrueColor24::decodeTrueColor32(char* src, XColor* dest, XImage* ximage)
{
int msb = ximage->byte_order;
unsigned int v = 0;
if ((!msb && lsb()) || (msb && !lsb()))
memcpy(dest, &v, 4);
else {
unsigned char* rr = (unsigned char*)(&v);
*(rr+3) = *(src);
*(rr+2) = *(src+1);
*(rr+1) = *(src+2);
*(rr+0) = *(src+3);
}
dest->red = (unsigned short)((v & rx_) >> rs_);
dest->green = (unsigned short)((v & gx_) >> gs_);
dest->blue = (unsigned short)((v & bx_) >> bs_);
}
void TrueColor24::encodeTrueColor(unsigned char* src, XImage* ximage)
{
if (!ximage)
return;
switch (ximage->bits_per_pixel) {
case 24:
encodeTrueColor24(src, ximage);
break;
case 32:
encodeTrueColor32(src, ximage);
break;
}
}
void TrueColor24::encodeTrueColor24(unsigned char* src, XImage* ximage)
{
int& width = ximage->width;
int& height = ximage->height;
char* data = ximage->data;
int bytesPerPixel = ximage->bits_per_pixel/8;
int msb = ximage->byte_order;
const unsigned char* ptr = src;
if ((!msb && lsb()) || (msb && !lsb())) {
for (int jj=0; jj<height; jj++) {
char* dest = data + jj*ximage->bytes_per_line;
for (int ii=0; ii<width; ii++, dest+=bytesPerPixel, ptr+=3) {
unsigned int r = ptr[0];
unsigned int g = ptr[1];
unsigned int b = ptr[2];
unsigned int v = 0;
v |= r << rs_;
v |= g << gs_;
v |= b << bs_;
memcpy(dest, &v, 3);
}
}
}
else {
for (int jj=0; jj<height; jj++) {
char* dest = data + jj*ximage->bytes_per_line;
for (int ii=0; ii<width; ii++, dest+=bytesPerPixel, ptr+=3) {
unsigned int r = ptr[0];
unsigned int g = ptr[1];
unsigned int b = ptr[2];
unsigned int v = 0;
v |= r << rs_;
v |= g << gs_;
v |= b << bs_;
unsigned char* rr = (unsigned char*)(&v);
*(dest) = *(rr+3);
*(dest+1) = *(rr+2);
*(dest+2) = *(rr+1);
}
}
}
}
void TrueColor24::encodeTrueColor32(unsigned char* src, XImage* ximage)
{
int& width = ximage->width;
int& height = ximage->height;
char* data = ximage->data;
int bytesPerPixel = ximage->bits_per_pixel/8;
int msb = ximage->byte_order;
const unsigned char* ptr = src;
if ((!msb && lsb()) || (msb && !lsb())) {
for (int jj=0; jj<height; jj++) {
// the line may be padded at the end
char* dest = data + jj*ximage->bytes_per_line;
for (int ii=0; ii<width; ii++, dest+=bytesPerPixel, ptr+=3) {
unsigned int r = ptr[0];
unsigned int g = ptr[1];
unsigned int b = ptr[2];
unsigned int v = 0;
#ifdef MAC_OSX_TK
unsigned int a = 0xff;
v |= a << as_;
#endif
v |= r << rs_;
v |= g << gs_;
v |= b << bs_;
memcpy(dest, &v, 4);
}
}
}
else {
for (int jj=0; jj<height; jj++) {
// the line may be padded at the end
char* dest = data + jj*ximage->bytes_per_line;
for (int ii=0; ii<width; ii++, dest+=bytesPerPixel, ptr+=3) {
unsigned int r = ptr[0];
unsigned int g = ptr[1];
unsigned int b = ptr[2];
unsigned int v = 0;
#ifdef MAC_OSX_TK
unsigned int a = 0xff;
v |= a << as_;
#endif
v |= r << rs_;
v |= g << gs_;
v |= b << bs_;
unsigned char* rr = (unsigned char*)(&v);
*(dest) = *(rr+3);
*(dest+1) = *(rr+2);
*(dest+2) = *(rr+1);
*(dest+3) = *(rr);
}
}
}
}
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