bool
GIFLoad::ReadGIFImageData()
{
unsigned char newEntry[ENTRY_COUNT];
unsigned char codeSize;
if (fInput->Read(&codeSize, 1) < 1)
return false;
if (codeSize > fPalette->size_in_bits) {
if (debug) {
syslog(LOG_ERR, "GIFLoad::ReadGIFImageData() - "
"Code_size should be %d, not %d, allowing it\n",
fCodeSize, codeSize);
}
if (!InitFrame(codeSize))
return false;
} else if (codeSize < fPalette->size_in_bits) {
if (debug) {
syslog(LOG_ERR, "GIFLoad::ReadGIFImageData() - "
"Code_size should be %d, not %d\n", fCodeSize, codeSize);
}
return false;
} else if (!InitFrame(fPalette->size_in_bits))
return false;
if (debug)
syslog(LOG_INFO, "GIFLoad::ReadGIFImageData() - Starting LZW\n");
while ((fNewCode = NextCode()) != -1 && fNewCode != fEndCode) {
if (fNewCode == fClearCode) {
ResetTable();
fNewCode = NextCode();
fOldCode[0] = fNewCode;
fOldCodeLength = 1;
if (!OutputColor(fOldCode, 1))
goto bad_end;
if (fNewCode == -1 || fNewCode == fEndCode) {
if (debug) {
syslog(LOG_ERR, "GIFLoad::ReadGIFImageData() - "
"Premature fEndCode or error reading fNewCode\n");
}
goto bad_end;
}
continue;
}
// explicitly check for lack of clear code at start of file
if (fOldCodeLength == 0) {
fOldCode[0] = fNewCode;
fOldCodeLength = 1;
if (!OutputColor(fOldCode, 1))
goto bad_end;
continue;
}
// error out if we're trying to access an out-of-bounds index
if (fNextCode >= ENTRY_COUNT)
goto bad_end;
if (fTable[fNewCode] != NULL) {
// exists in table
if (!OutputColor(fTable[fNewCode], fEntrySize[fNewCode]))
goto bad_end;
//memcpy(newEntry, fOldCode, fOldCodeLength);
for (unsigned int x = 0; x < fOldCodeLength; x++)
newEntry[x] = fOldCode[x];
//memcpy(newEntry + fOldCodeLength, fTable[fNewCode], 1);
newEntry[fOldCodeLength] = fTable[fNewCode][0];
} else {
// does not exist in table
//memcpy(newEntry, fOldCode, fOldCodeLength);
for (unsigned int x = 0; x < fOldCodeLength; x++)
newEntry[x] = fOldCode[x];
//memcpy(newEntry + fOldCodeLength, fOldCode, 1);
newEntry[fOldCodeLength] = fOldCode[0];
if (!OutputColor(newEntry, fOldCodeLength + 1))
goto bad_end;
}
fTable[fNextCode] = MemblockAllocate(fOldCodeLength + 1);
if (fTable[fNextCode] == NULL)
goto bad_end;
//memcpy(fTable[fNextCode], newEntry, fOldCodeLength + 1);
for (unsigned int x = 0; x < fOldCodeLength + 1; x++)
fTable[fNextCode][x] = newEntry[x];
fEntrySize[fNextCode] = fOldCodeLength + 1;
//memcpy(fOldCode, fTable[fNewCode], fEntrySize[fNewCode]);
for (int x = 0; x < fEntrySize[fNewCode]; x++)
fOldCode[x] = fTable[fNewCode][x];
fOldCodeLength = fEntrySize[fNewCode];
fNextCode++;
if (fNextCode > fMaxCode && fBits < LZ_MAX_BITS) {
fBits++;
fMaxCode = (1 << fBits) - 1;
}
}
MemblockDeleteAll();
if (fNewCode == -1)
return false;
if (debug)
syslog(LOG_INFO, "GIFLoad::ReadGIFImageData() - Done\n");
return true;
bad_end:
if (debug)
syslog(LOG_ERR, "GIFLoad::ReadGIFImageData() - Reached a bad end\n");
MemblockDeleteAll();
return false;
}
void Mesh::CreateSVG(const std::string& filename) const {
std::ofstream ostr(filename.c_str());
ostr << "<body bgcolor=dddddd onLoad=\"render()\" >\n";
// a few checkboxes at the top of the page to control the visualization
ostr << "<form name=\"orderForm\">\n";
ostr << " <input type=\"checkbox\" name=\"illegal\" checked "
<< " onClick=\"render()\">draw illegal (red) & next legal collapse (blue) edges<br>\n";
ostr << " <input type=\"checkbox\" name=\"wireframe\" "
<< " onClick=\"render()\">draw all edges<br>\n";
ostr << " <input type=\"checkbox\" name=\"black\" "
<< " onClick=\"render()\">toggle white vs. black<br>\n";
ostr << "</form>\n";
// javascript to actually change the visualization based on the checkboxes
ostr << "<script language=\"JavaScript\">\n";
ostr << " function render() {\n";
ostr << " var mysvg = document.getElementById(\"mesh\");\n";
ostr << " if (document.orderForm.wireframe.checked == false) {\n";
ostr << " var polys = mysvg.children;\n";
ostr << " for (var i = 0; i < polys.length; i++) {\n";
ostr << " if (polys[i].tagName.toUpperCase() == \"POLYGON\") {\n";
ostr << " polys[i].style[\"strokeWidth\"] = \"0\"\n";
ostr << " }\n";
ostr << " }\n";
ostr << " } else if (document.orderForm.black.checked == false) {\n";
ostr << " var polys = mysvg.children;\n";
ostr << " for (var i = 0; i < polys.length; i++) {\n";
ostr << " if (polys[i].tagName.toUpperCase() == \"POLYGON\") {\n";
ostr << " polys[i].style.stroke = \"#FFFFFF\"\n";
ostr << " polys[i].style[\"strokeWidth\"] = \"1\"\n";
ostr << " }\n";
ostr << " }\n";
ostr << " mysvg.style.background = \"white\"\n";
ostr << " } else {\n";
ostr << " var polys = mysvg.children;\n";
ostr << " for (var i = 0; i < polys.length; i++) {\n";
ostr << " if (polys[i].tagName.toUpperCase() == \"POLYGON\") {\n";
ostr << " polys[i].style.stroke = \"#000000\"\n";
ostr << " polys[i].style[\"strokeWidth\"] = \"2\"\n";
ostr << " }\n";
ostr << " }\n";
ostr << " mysvg.style.background = \"white\"\n";
ostr << " }\n";
ostr << " if (document.orderForm.illegal.checked == false) {\n";
ostr << " var polys = mysvg.children;\n";
ostr << " for (var i = 0; i < polys.length; i++) {\n";
ostr << " if (polys[i].tagName.toUpperCase() == \"LINE\") {\n";
ostr << " polys[i].style[\"strokeWidth\"] = \"0\"\n";
ostr << " }\n";
ostr << " }\n";
ostr << " } else {\n";
ostr << " var polys = mysvg.children;\n";
ostr << " for (var i = 0; i < polys.length; i++) {\n";
ostr << " if (polys[i].tagName.toUpperCase() == \"LINE\") {\n";
ostr << " polys[i].style[\"strokeWidth\"] = \"5\"\n";
ostr << " }\n";
ostr << " }\n";
ostr << " mysvg.style.background = \"white\"\n";
ostr << " }\n";
ostr << " }\n";
ostr << "</script>\n";
ostr << "<svg id=\"mesh\" height=\"" << height + 2*BORDER
<< "\" width=\"" << width + 2*BORDER
<< "\" style=\"background:white\" shape-rendering=\"crispEdges\">\n";
// draw the triangles with the average color of the vertices
for (triangles_set::const_iterator itr = triangles.begin(); itr != triangles.end(); itr++) {
Triangle *t = *itr;
float r = (t->getVertex(0)->r() +t->getVertex(1)->r() +t->getVertex(2)->r()) / 3.0;
float g = (t->getVertex(0)->g() +t->getVertex(1)->g() +t->getVertex(2)->g()) / 3.0;
float b = (t->getVertex(0)->b() +t->getVertex(1)->b() +t->getVertex(2)->b()) / 3.0;
ostr << "<polygon points=\""
<< std::setw(8) << t->getVertex(0)->x() << "," << std::setw(8) << t->getVertex(0)->y() << " "
<< std::setw(8) << t->getVertex(1)->x() << "," << std::setw(8) << t->getVertex(1)->y() << " "
<< std::setw(8) << t->getVertex(2)->x() << "," << std::setw(8) << t->getVertex(2)->y()
<< "\" style=\"fill:#" << OutputColor(Vertex(0,0,r,g,b))
<< ";stroke:#" << OutputColor(Vertex(0,0,r,g,b))
<< ";stroke-width:1"
<< ";stroke-linecap:round\" "
<< ";stroke-linejoin:round\" "
<< "/>" << std::endl;
}
// draw the illegal edges in red
for (edges_map::const_iterator itr = edges.begin(); itr != edges.end(); itr++) {
const Edge *e = itr->second;
assert (itr->first.first->getID() < itr->first.second->getID());
if (!e->isLegal()) {
ostr << "<line "
<< "x1=\"" << std::setw(8) << e->getV1()->x() << "\" "
<< "y1=\"" << std::setw(8) << e->getV1()->y() << "\" "
<< "x2=\"" << std::setw(8) << e->getV2()->x() << "\" "
<< "y2=\"" << std::setw(8) << e->getV2()->y() << "\" "
<< " stroke=\"red\" "
<< " stroke-width=\"0\" "
<< " stroke-linecap=\"round\" "
<< "/>" << std::endl;
}
}
// draw the next (legal) edge to collapse in blue
Edge *e = FindEdge();
if (e != NULL) {
ostr << "<line "
<< "x1=\"" << std::setw(8) << e->getV1()->x() << "\" "
<< "y1=\"" << std::setw(8) << e->getV1()->y() << "\" "
<< "x2=\"" << std::setw(8) << e->getV2()->x() << "\" "
<< "y2=\"" << std::setw(8) << e->getV2()->y() << "\" "
<< " stroke=\"blue\" "
<< " stroke-width=\"0\" "
<< " stroke-linecap=\"round\" "
<< "/>" << std::endl;
}
ostr << "</svg>\n";
// print some simple stats at the bottom of the page
ostr << "<p>" << *this << "</p>" << std::endl;
ostr << "</body>\n";
}
bool
GIFLoad::ReadGIFImageData()
{
unsigned char newEntry[4096];
unsigned char cs;
fInput->Read(&cs, 1);
if (cs == fPalette->size_in_bits) {
if (!InitFrame(fPalette->size_in_bits))
return false;
} else if (cs > fPalette->size_in_bits) {
if (debug)
syslog(LOG_ERR, "GIFLoad::ReadGIFImageData() - Code_size should be %d, not "
"%d, allowing it\n", fCodeSize, cs);
if (!InitFrame(cs))
return false;
} else if (cs < fPalette->size_in_bits) {
if (debug)
syslog(LOG_ERR, "GIFLoad::ReadGIFImageData() - Code_size should be %d, not "
"%d\n", fCodeSize, cs);
return false;
}
if (debug)
syslog(LOG_ERR, "GIFLoad::ReadGIFImageData() - Starting LZW\n");
while ((fNewCode = NextCode()) != -1 && fNewCode != fEndCode) {
if (fNewCode == fClearCode) {
ResetTable();
fNewCode = NextCode();
fOldCode[0] = fNewCode;
fOldCodeLength = 1;
if (!OutputColor(fOldCode, 1)) goto bad_end;
if (fNewCode == -1 || fNewCode == fEndCode) {
if (debug)
syslog(LOG_ERR, "GIFLoad::ReadGIFImageData() - Premature fEndCode "
"or error\n");
goto bad_end;
}
continue;
}
// Explicitly check for lack of clear code at start of file
if (fOldCodeLength == 0) {
fOldCode[0] = fNewCode;
fOldCodeLength = 1;
if (!OutputColor(fOldCode, 1))
goto bad_end;
continue;
}
if (fTable[fNewCode] != NULL) { // Does exist in table
if (!OutputColor(fTable[fNewCode], fEntrySize[fNewCode]))
goto bad_end;
//memcpy(newEntry, fOldCode, fOldCodeLength);
for (int x = 0; x < fOldCodeLength; x++) {
newEntry[x] = fOldCode[x];
}
//memcpy(newEntry + fOldCodeLength, fTable[fNewCode], 1);
newEntry[fOldCodeLength] = *fTable[fNewCode];
} else { // Does not exist in table
//memcpy(newEntry, fOldCode, fOldCodeLength);
for (int x = 0; x < fOldCodeLength; x++) {
newEntry[x] = fOldCode[x];
}
//memcpy(newEntry + fOldCodeLength, fOldCode, 1);
newEntry[fOldCodeLength] = *fOldCode;
if (!OutputColor(newEntry, fOldCodeLength + 1))
goto bad_end;
}
fTable[fNextCode] = MemblockAllocate(fOldCodeLength + 1);
//memcpy(fTable[fNextCode], newEntry, fOldCodeLength + 1);
for (int x = 0; x < fOldCodeLength + 1; x++) {
fTable[fNextCode][x] = newEntry[x];
}
fEntrySize[fNextCode] = fOldCodeLength + 1;
//memcpy(fOldCode, fTable[fNewCode], fEntrySize[fNewCode]);
for (int x = 0; x < fEntrySize[fNewCode]; x++) {
fOldCode[x] = fTable[fNewCode][x];
}
fOldCodeLength = fEntrySize[fNewCode];
fNextCode++;
if (fNextCode > fMaxCode && fBits != 12) {
fBits++;
fMaxCode = (1 << fBits) - 1;
}
}
MemblockDeleteAll();
if (fNewCode == -1)
return false;
if (debug)
syslog(LOG_ERR, "GIFLoad::ReadGIFImageData() - Done\n");
return true;
bad_end:
if (debug)
syslog(LOG_ERR, "GIFLoad::ReadGIFImageData() - Reached a bad end\n");
MemblockDeleteAll();
return false;
}
