//-----------------------------------------------------------------
// get font string
void mgTextBuffer::getFont(
mgString& fontSpec)
{
fontSpec.format("%s-%d%s%s", (const char*) m_fontFace, m_fontSize,
m_fontBold == mgTrue? "-b" : "", m_fontItalic == mgTrue ? "-i" : "");
}
//--------------------------------------------------------------
// check version of OpenGL available
BOOL mgWinGL21Support::checkVersion(
int reqGLVersion,
int reqShaderVersion,
mgString& errorMsg)
{
const char* vendor = (const char*) glGetString(GL_VENDOR);
if (vendor != NULL)
mgDebug("OpenGL device vendor: %s", (const char*) vendor);
const char* renderer = (const char*) glGetString(GL_RENDERER);
if (renderer != NULL)
mgDebug("OpenGL device renderer: %s", (const char*) renderer);
const char* glVersionStr = (const char*) glGetString(GL_VERSION);
if (glVersionStr == NULL)
{
errorMsg = "cannot read OpenGL version";
return false;
}
mgDebug("OpenGL version: %s", (const char*) glVersionStr);
int major, minor, glVersion;
if (2 != sscanf(glVersionStr, "%d.%d", &major, &minor))
{
errorMsg.format("cannot parse OpenGL version %s", (const char*) glVersionStr);
return false;
}
// trim trailing zeros. 3.3 and 3.30 are the same
while (minor%10 == 0)
minor /= 10;
glVersion = major*100 + minor;
const char* shaderVersionStr = (const char*) glGetString(GL_SHADING_LANGUAGE_VERSION);
if (shaderVersionStr == NULL)
{
errorMsg = "cannot read OpenGL Shader Language version";
return false;
}
mgDebug("OpenGL shader version: %s", (const char*) shaderVersionStr);
int shaderVersion;
if (2 != sscanf(shaderVersionStr, "%d.%d", &major, &minor))
{
errorMsg.format("cannot parse OpenGL version %s", (const char*) shaderVersionStr);
return false;
}
// trim trailing zeros. 3.3 and 3.30 are the same
while (minor%10 == 0)
minor /= 10;
shaderVersion = major*100 + minor;
if (glVersion < reqGLVersion || shaderVersion < reqShaderVersion)
{
errorMsg.format("App requested OpenGl %d.%d, shader %d.%d\nSystem has OpenGL %d.%d, shader %d.%d",
reqGLVersion/100, reqGLVersion%100, reqShaderVersion/100, reqShaderVersion%100,
glVersion/100, glVersion%100, shaderVersion/100, shaderVersion%100);
return false;
}
return true;
}
//-----------------------------------------------------------------------------
// report status for debug log
void Landscape::appDebugStats(
mgString& status)
{
status.format("max count = %d", m_maxCount);
}
