static const gl_param_t* get_gl_param()
{
if (!QOpenGLContext::currentContext()) {
qWarning("%s: current context is null", __FUNCTION__);
return gl_param_compat;
}
static gl_param_t* gp = 0;
if (gp)
return gp;
bool has_16 = false;
// [4] is always available
if (test_gl_param(gl_param_desktop[4], &has_16)) {
if (has_16 && depth16BitTexture() == 16)
gp = (gl_param_t*)gl_param_desktop;
else
gp = (gl_param_t*)gl_param_desktop_fallback;
has_16_tex = has_16;
if (!useDeprecatedFormats()) {
qDebug("using gl_param_desktop%s", gp == gl_param_desktop? "" : "_fallback");
return gp;
}
} else if (test_gl_param(gl_param_es3[4], &has_16)) {
gp = (gl_param_t*)gl_param_es3;
has_16_tex = has_16;
if (!useDeprecatedFormats()) {
qDebug("using gl_param_es3");
return gp;
}
}
qDebug("fallback to gl_param_compat");
gp = (gl_param_t*)gl_param_compat;
has_16_tex = false;
return gp;
}
bool hasRG()
{
static int has_rg = -1;
if (has_rg >= 0)
return !!has_rg;
qDebug("check desktop rg: %#X", gl_param_desktop[1].internal_format);
if (test_gl_param(gl_param_desktop[1])) {
has_rg = 1;
return true;
}
qDebug("check es3 rg: %#X", gl_param_es3[1].internal_format);
if (test_gl_param(gl_param_es3[1])) {
has_rg = 1;
return true;
}
qDebug("check GL_EXT_texture_rg");
static const char* ext[] = { "GL_EXT_texture_rg", 0}; //RED, RG, R8, RG8
if (hasExtension(ext)) {
qDebug("has extension GL_EXT_texture_rg");
has_rg = 1;
return true;
}
qDebug("check gl es>=3 rg");
if (QOpenGLContext::currentContext())
has_rg = isOpenGLES() && QOpenGLContext::currentContext()->format().majorVersion() > 2;
return has_rg;
}
bool hasRG()
{
static int has_rg = -1;
if (has_rg >= 0)
return !!has_rg;
if (test_gl_param(gl_param_desktop[1])) {
has_rg = 1;
return true;
}
if (test_gl_param(gl_param_es3[1])) {
has_rg = 1;
return true;
}
has_rg = 0;
return false;
}
static const gl_param_t* get_gl_param()
{
if (!QOpenGLContext::currentContext()) {
qWarning("%s: current context is null", __FUNCTION__);
return gl_param_compat;
}
static gl_param_t* gp = 0;
if (gp)
return gp;
bool has_16 = false;
// [4] is always available
if (test_gl_param(gl_param_desktop[4], &has_16)) {
if (has_16 && depth16BitTexture() == 16)
gp = (gl_param_t*)gl_param_desktop;
else
gp = (gl_param_t*)gl_param_desktop_fallback;
has_16_tex = has_16;
if (!useDeprecatedFormats()) {
qDebug("using gl_param_desktop%s", gp == gl_param_desktop? "" : "_fallback");
return gp;
}
} else if (test_gl_param(gl_param_es3[4], &has_16)) { //3.0 will fail because no glGetTexLevelParameteriv
gp = (gl_param_t*)gl_param_es3;
has_16_tex = has_16;
if (!useDeprecatedFormats()) {
qDebug("using gl_param_es3");
return gp;
}
} else if (isOpenGLES()) {
if (QOpenGLContext::currentContext()->format().majorVersion() > 2)
gp = (gl_param_t*)gl_param_es3; //for 3.0
else if (hasRG())
gp = (gl_param_t*)gl_param_es2rg;
has_16_tex = has_16;
if (gp && !useDeprecatedFormats()) {
qDebug("using gl_param_%s", gp == gl_param_es3 ? "es3" : "es2rg");
return gp;
}
}
qDebug("fallback to gl_param_compat");
gp = (gl_param_t*)gl_param_compat;
has_16_tex = false;
return gp;
}
