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// Scintilla source code edit control
/** @file XPM.cxx
** Define a class that holds data in the X Pixmap (XPM) format.
**/
// Copyright 1998-2003 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.
#include <string.h>
#include <stdlib.h>
#include <vector>
#include <map>
#include "Platform.h"
#include "XPM.h"
#ifdef SCI_NAMESPACE
using namespace Scintilla;
#endif
static const char *NextField(const char *s) {
// In case there are leading spaces in the string
while (*s && *s == ' ') {
s++;
}
while (*s && *s != ' ') {
s++;
}
while (*s && *s == ' ') {
s++;
}
return s;
}
// Data lines in XPM can be terminated either with NUL or "
static size_t MeasureLength(const char *s) {
size_t i = 0;
while (s[i] && (s[i] != '\"'))
i++;
return i;
}
ColourDesired XPM::ColourDesiredFromCode(int ch) const {
return *colourCodeTable[ch];
}
ColourDesired XPM::ColourFromCode(int ch) const {
return *colourCodeTable[ch];
}
void XPM::FillRun(Surface *surface, int code, int startX, int y, int x) {
if ((code != codeTransparent) && (startX != x)) {
PRectangle rc(startX, y, x, y+1);
surface->FillRectangle(rc, ColourFromCode(code));
}
}
XPM::XPM(const char *textForm) :
data(0), codes(0), colours(0), lines(0) {
Init(textForm);
}
XPM::XPM(const char *const *linesForm) :
data(0), codes(0), colours(0), lines(0) {
Init(linesForm);
}
XPM::~XPM() {
Clear();
}
void XPM::Init(const char *textForm) {
Clear();
// Test done is two parts to avoid possibility of overstepping the memory
// if memcmp implemented strangely. Must be 4 bytes at least at destination.
if ((0 == memcmp(textForm, "/* X", 4)) && (0 == memcmp(textForm, "/* XPM */", 9))) {
// Build the lines form out of the text form
const char **linesForm = LinesFormFromTextForm(textForm);
if (linesForm != 0) {
Init(linesForm);
delete []linesForm;
}
} else {
// It is really in line form
Init(reinterpret_cast<const char * const *>(textForm));
}
}
void XPM::Init(const char *const *linesForm) {
Clear();
height = 1;
width = 1;
nColours = 1;
data = NULL;
codeTransparent = ' ';
codes = NULL;
colours = NULL;
lines = NULL;
if (!linesForm)
return;
const char *line0 = linesForm[0];
width = atoi(line0);
line0 = NextField(line0);
height = atoi(line0);
line0 = NextField(line0);
nColours = atoi(line0);
line0 = NextField(line0);
if (atoi(line0) != 1) {
// Only one char per pixel is supported
return;
}
codes = new char[nColours];
colours = new ColourDesired[nColours];
int strings = 1+height+nColours;
lines = new char *[strings];
size_t allocation = 0;
for (int i=0; i<strings; i++) {
allocation += MeasureLength(linesForm[i]) + 1;
}
data = new char[allocation];
char *nextBit = data;
for (int j=0; j<strings; j++) {
lines[j] = nextBit;
size_t len = MeasureLength(linesForm[j]);
memcpy(nextBit, linesForm[j], len);
nextBit += len;
*nextBit++ = '\0';
}
for (int code=0; code<256; code++) {
colourCodeTable[code] = 0;
}
for (int c=0; c<nColours; c++) {
const char *colourDef = linesForm[c+1];
codes[c] = colourDef[0];
colourDef += 4;
if (*colourDef == '#') {
colours[c].Set(colourDef);
} else {
colours[c] = ColourDesired(0xff, 0xff, 0xff);
codeTransparent = codes[c];
}
colourCodeTable[static_cast<unsigned char>(codes[c])] = &(colours[c]);
}
}
void XPM::Clear() {
delete []data;
data = 0;
delete []codes;
codes = 0;
delete []colours;
colours = 0;
delete []lines;
lines = 0;
}
void XPM::Draw(Surface *surface, PRectangle &rc) {
if (!data || !codes || !colours || !lines) {
return;
}
// Centre the pixmap
int startY = rc.top + (rc.Height() - height) / 2;
int startX = rc.left + (rc.Width() - width) / 2;
for (int y=0; y<height; y++) {
int prevCode = 0;
int xStartRun = 0;
for (int x=0; x<width; x++) {
int code = lines[y+nColours+1][x];
if (code != prevCode) {
FillRun(surface, prevCode, startX + xStartRun, startY + y, startX + x);
xStartRun = x;
prevCode = code;
}
}
FillRun(surface, prevCode, startX + xStartRun, startY + y, startX + width);
}
}
void XPM::PixelAt(int x, int y, ColourDesired &colour, bool &transparent) const {
if (!data || !codes || !colours || !lines || (x<0) || (x >= width) || (y<0) || (y >= height)) {
colour = 0;
transparent = true;
return;
}
int code = lines[y+nColours+1][x];
transparent = code == codeTransparent;
if (transparent) {
colour = 0;
} else {
colour = ColourDesiredFromCode(code).AsLong();
}
}
const char **XPM::LinesFormFromTextForm(const char *textForm) {
// Build the lines form out of the text form
const char **linesForm = 0;
int countQuotes = 0;
int strings=1;
int j=0;
for (; countQuotes < (2*strings) && textForm[j] != '\0'; j++) {
if (textForm[j] == '\"') {
if (countQuotes == 0) {
// First field: width, height, number of colors, chars per pixel
const char *line0 = textForm + j + 1;
// Skip width
line0 = NextField(line0);
// Add 1 line for each pixel of height
strings += atoi(line0);
line0 = NextField(line0);
// Add 1 line for each colour
strings += atoi(line0);
linesForm = new const char *[strings];
if (linesForm == 0) {
break; // Memory error!
}
}
if (countQuotes / 2 >= strings) {
break; // Bad height or number of colors!
}
if ((countQuotes & 1) == 0) {
linesForm[countQuotes / 2] = textForm + j + 1;
}
countQuotes++;
}
}
if (textForm[j] == '\0' || countQuotes / 2 > strings) {
// Malformed XPM! Height + number of colors too high or too low
delete []linesForm;
linesForm = 0;
}
return linesForm;
}
// In future, may want to minimize search time by sorting and using a binary search.
XPMSet::XPMSet() : set(0), len(0), maximum(0), height(-1), width(-1) {
}
XPMSet::~XPMSet() {
Clear();
}
void XPMSet::Clear() {
for (int i = 0; i < len; i++) {
delete set[i];
}
delete []set;
set = 0;
len = 0;
maximum = 0;
height = -1;
width = -1;
}
void XPMSet::Add(int ident, const char *textForm) {
// Invalidate cached dimensions
height = -1;
width = -1;
// Replace if this id already present
for (int i = 0; i < len; i++) {
if (set[i]->GetId() == ident) {
set[i]->Init(textForm);
return;
}
}
// Not present, so add to end
XPM *pxpm = new XPM(textForm);
if (pxpm) {
pxpm->SetId(ident);
if (len == maximum) {
maximum += 64;
XPM **setNew = new XPM *[maximum];
for (int i = 0; i < len; i++) {
setNew[i] = set[i];
}
delete []set;
set = setNew;
}
set[len] = pxpm;
len++;
}
}
XPM *XPMSet::Get(int ident) {
for (int i = 0; i < len; i++) {
if (set[i]->GetId() == ident) {
return set[i];
}
}
return 0;
}
int XPMSet::GetHeight() {
if (height < 0) {
for (int i = 0; i < len; i++) {
if (height < set[i]->GetHeight()) {
height = set[i]->GetHeight();
}
}
}
return (height > 0) ? height : 0;
}
int XPMSet::GetWidth() {
if (width < 0) {
for (int i = 0; i < len; i++) {
if (width < set[i]->GetWidth()) {
width = set[i]->GetWidth();
}
}
}
return (width > 0) ? width : 0;
}
RGBAImage::RGBAImage(int width_, int height_, float scale_, const unsigned char *pixels_) :
height(height_), width(width_), scale(scale_) {
if (pixels_) {
pixelBytes.assign(pixels_, pixels_ + CountBytes());
} else {
pixelBytes.resize(CountBytes());
}
}
RGBAImage::RGBAImage(const XPM &xpm) {
height = xpm.GetHeight();
width = xpm.GetWidth();
scale = 1;
pixelBytes.resize(CountBytes());
for (int y=0; y<height; y++) {
for (int x=0; x<width; x++) {
ColourDesired colour;
bool transparent = false;
xpm.PixelAt(x, y, colour, transparent);
SetPixel(x, y, colour, transparent ? 0 : 255);
}
}
}
RGBAImage::~RGBAImage() {
}
int RGBAImage::CountBytes() const {
return width * height * 4;
}
const unsigned char *RGBAImage::Pixels() const {
return &pixelBytes[0];
}
void RGBAImage::SetPixel(int x, int y, ColourDesired colour, int alpha) {
unsigned char *pixel = &pixelBytes[0] + (y*width+x) * 4;
// RGBA
pixel[0] = static_cast<unsigned char>(colour.GetRed());
pixel[1] = static_cast<unsigned char>(colour.GetGreen());
pixel[2] = static_cast<unsigned char>(colour.GetBlue());
pixel[3] = static_cast<unsigned char>(alpha);
}
RGBAImageSet::RGBAImageSet() : height(-1), width(-1){
}
RGBAImageSet::~RGBAImageSet() {
Clear();
}
/// Remove all images.
void RGBAImageSet::Clear() {
for (ImageMap::iterator it=images.begin(); it != images.end(); ++it) {
delete it->second;
it->second = 0;
}
images.clear();
height = -1;
width = -1;
}
/// Add an image.
void RGBAImageSet::Add(int ident, RGBAImage *image) {
ImageMap::iterator it=images.find(ident);
if (it == images.end()) {
images[ident] = image;
} else {
delete it->second;
it->second = image;
}
height = -1;
width = -1;
}
/// Get image by id.
RGBAImage *RGBAImageSet::Get(int ident) {
ImageMap::iterator it = images.find(ident);
if (it != images.end()) {
return it->second;
}
return NULL;
}
/// Give the largest height of the set.
int RGBAImageSet::GetHeight() const {
if (height < 0) {
for (ImageMap::const_iterator it=images.begin(); it != images.end(); ++it) {
if (height < it->second->GetHeight()) {
height = it->second->GetHeight();
}
}
}
return (height > 0) ? height : 0;
}
/// Give the largest width of the set.
int RGBAImageSet::GetWidth() const {
if (width < 0) {
for (ImageMap::const_iterator it=images.begin(); it != images.end(); ++it) {
if (width < it->second->GetWidth()) {
width = it->second->GetWidth();
}
}
}
return (width > 0) ? width : 0;
}

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