//--------------------------------------------------------------------------
// load and compile a shader
// =-= source code modified from a version in the OpenGL SuperBible
BOOL GL21compileShaderPair(
const char* shaderDir,
GLuint hVertexShader,
const char* vertexFileName,
GLuint hFragmentShader,
const char* fragmentFileName)
{
GLint testVal;
// Load them. If fail clean up and return null
mgString fileName;
fileName.format("%s%s", (const char*) shaderDir, (const char*) vertexFileName);
mgOSFixFileName(fileName);
if (!GL21loadShaderFile(fileName, hVertexShader))
{
mgDebug("shader %s not found", (const char*) fileName);
return false;
}
mgString log;
// Compile vertex shader
glCompileShader(hVertexShader);
GL21getShaderLog(hVertexShader, log);
log.trim();
if (log.isEmpty())
mgDebug("shader %s compiled", (const char*) fileName);
else mgDebug("shader %s log:\n%s", (const char*) fileName, (const char*) log);
// Check for errors
glGetShaderiv(hVertexShader, GL_COMPILE_STATUS, &testVal);
if (testVal == GL_FALSE)
{
mgDebug("shader %s compilation failed.", (const char*) fileName);
return false;
}
fileName.format("%s%s", (const char*) shaderDir, (const char*) fragmentFileName);
mgOSFixFileName(fileName);
if (!GL21loadShaderFile(fileName, hFragmentShader))
{
mgDebug("shader %s not found", (const char*) fileName);
return false;
}
glCompileShader(hFragmentShader);
GL21getShaderLog(hFragmentShader, log);
log.trim();
if (log.isEmpty())
mgDebug("shader %s compiled", (const char*) fileName);
else mgDebug("shader %s log:\n%s", (const char*) fileName, (const char*) log);
glGetShaderiv(hFragmentShader, GL_COMPILE_STATUS, &testVal);
if (testVal == GL_FALSE)
{
mgDebug("shader %s compilation failed.", (const char*) fileName);
return false;
}
return true;
}
//--------------------------------------------------------------
// constructor
MinecraftRegion::MinecraftRegion(
const char* regionDir,
int regionX,
int regionZ)
{
memset(m_header, 0, sizeof(m_header));
m_lock = mgOSLock::create();
// create the region file name
m_fileName.format("%s/r.%d.%d.mcr", (const char*) regionDir, regionX, regionZ);
mgOSFixFileName(m_fileName);
// open the file
m_regionFile = mgOSFileOpen(m_fileName, "rb");
if (m_regionFile == NULL)
{
mgDebug("could not open region file %s", (const char*) m_fileName);
m_exists = false;
return;
}
else m_exists = true;
// read the header
int count = fread(m_header, 1, sizeof(m_header), m_regionFile);
if (count != sizeof(m_header))
{
mgDebug("Could not read region (%d, %d) header -- %d bytes read, %d expected",
regionX, regionZ, count, sizeof(m_header));
m_exists = false;
}
}
//--------------------------------------------------------------
// parse a file
void mgXMLScanner::parseFile(
const char* fileName)
{
m_sourceFileName = fileName;
mgOSFixFileName(m_sourceFileName);
FILE* inFile = mgOSFileOpen(m_sourceFileName, "rb");
if (inFile == NULL)
throw new mgErrorMsg("xmlFileNotFound", "filename", "%s", (const char*) m_sourceFileName);
char* buffer = new char[PARSE_BUFFER_SIZE];
while (true)
{
size_t len = fread(buffer, 1, PARSE_BUFFER_SIZE, inFile);
if (len <= 0)
break;
// parse buffer of file data
parse((int) len, buffer);
}
delete buffer;
fclose(inFile);
// end of input
parseEnd();
}
//--------------------------------------------------------------
// get filename valued option
void mgOptionsFile::getFileName(
const char* name,
const char* relativeTo,
const char* defaultValue,
mgString& fileName) const
{
mgString key(name);
key.makeLower();
mgString value(defaultValue);
m_options.lookup(key, value);
mgString relativeFileName(relativeTo);
mgOSFixFileName(relativeFileName);
// handle ;-delimeted pairs of filenames we use for RGB+alpha images
int semi = value.find(0, ";");
if (semi != -1)
{
mgString rgbName;
value.substring(rgbName, 0, semi);
value.deleteAt(0, semi+1);
mgOSResolveRelativeName(relativeFileName, rgbName, fileName);
fileName += ';';
mgString alphaName;
mgOSResolveRelativeName(relativeFileName, value, alphaName);
fileName += alphaName;
}
else
{
mgOSResolveRelativeName(relativeFileName, value, fileName);
}
}
//--------------------------------------------------------------
// load texture cube from file list
mgTextureCube* mgGL33Services::loadTextureCube(
const char* xminImage,
const char* xmaxImage,
const char* yminImage,
const char* ymaxImage,
const char* zminImage,
const char* zmaxImage)
{
mgGL33TextureCube* texture = new mgGL33TextureCube();
memset(texture->m_imgTransparent, 0, sizeof(texture->m_imgTransparent));
// copy the file list into the texture
texture->m_xminImage = xminImage;
mgOSFixFileName(texture->m_xminImage);
texture->m_xmaxImage = xmaxImage;
mgOSFixFileName(texture->m_xminImage);
texture->m_yminImage = yminImage;
mgOSFixFileName(texture->m_yminImage);
texture->m_ymaxImage = ymaxImage;
mgOSFixFileName(texture->m_ymaxImage);
texture->m_zminImage = zminImage;
mgOSFixFileName(texture->m_zminImage);
texture->m_zmaxImage = zmaxImage;
mgOSFixFileName(texture->m_zmaxImage);
reloadTextureCube(texture);
m_textureCubes.add(texture);
return texture;
}
//--------------------------------------------------------------
// load texture from image file
mgTextureImage* mgGL33Services::loadTexture(
const char* fileName)
{
const void *value;
// if we've already created the texture
if (m_textureImages.lookup(fileName, value))
return (mgTextureImage*) value;
mgGL33TextureImage* texture = new mgGL33TextureImage();
texture->m_fileName = fileName;
mgOSFixFileName(texture->m_fileName);
reloadTextureImage(texture);
// save the texture id (under original name. copy in texture is fixed)
m_textureImages.setAt(fileName, texture);
return texture;
}
//--------------------------------------------------------------
// load texture array from file list
mgTextureArray* mgGL33Services::loadTextureArray(
const mgStringArray& fileList)
{
mgGL33TextureArray* texture = new mgGL33TextureArray();
// flag for each transparent texture
texture->m_imgTransparent = new BOOL[fileList.length()];
memset(texture->m_imgTransparent, 0, sizeof(BOOL)*fileList.length());
// copy the file list into the texture
mgString fileName;
for (int i = 0; i < fileList.length(); i++)
{
fileName = fileList[i];
mgOSFixFileName(fileName);
texture->m_fileList.add(fileName);
}
reloadTextureArray(texture);
m_textureArrays.add(texture);
return texture;
}
//--------------------------------------------------------------
// resolve possibly relative file name.
void mgOSResolveRelativeName(
const char* sourceName,
const char* relName,
mgString& absName)
{
mgString name(relName);
mgOSFixFileName(name);
// if relative name starts with backslash, we're done
if (name.startsWith("\\"))
{
absName = name;
return;
}
// if relative name starts with X: (drive letter), we're done
char letter[MG_MAX_LETTER];
int posn = name.nextLetter(0, letter);
if (posn < name.length())
{
posn = name.nextLetter(posn, letter);
if (strcmp(letter, ":") == 0)
{
absName = name;
return;
}
}
// assume it's really relative. strip last directory in source file
mgString sourceFile(sourceName);
int lastSlash = sourceFile.reverseFind(sourceFile.length(), '\\');
if (lastSlash != -1)
sourceFile.substring(absName, 0, lastSlash+1);
else absName.empty(); // source file has no dir
absName += name;
}
//--------------------------------------------------------------
// resolve possibly relative file name.
void mgOSResolveRelativeName(
const char* sourceFile,
const char* relName,
mgString& absName)
{
mgString name(relName);
mgOSFixFileName(name);
// if relative name starts with /, we're done
if (name.startsWith("/"))
{
absName = name;
return;
}
// assume it's really relative. strip last directory in source file
absName = sourceFile;
int lastSlash = absName.reverseFind(absName.length(), "/");
if (lastSlash != -1)
absName.deleteAt(lastSlash+1, absName.length()-(lastSlash+1));
else absName.empty(); // source file has no dir
absName += name;
}
