fly/flightgear
1
0
Fork 0
Code Activity

Use OSG to find out the maximum supported texture size

Browse source 
The DDS Texture cache will auto resize textures that are larger than this value.
This commit is contained in:
Richard Harrison 2019-04-28 19:37:39 +02:00
parent d3ce7adc95
commit 1399640d79
3 changed files with 16 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

22
src/Viewer/renderer_legacy.cxx
View file

@ -356,7 +356,8 @@ FGRenderer::FGRenderer() :
_fogDensity( new osg::Uniform( "fg_FogDensity", 0.0001f ) ),
_shadowNumber( new osg::Uniform( "fg_ShadowNumber", (int)4 ) ),
_shadowDistances( new osg::Uniform( "fg_ShadowDistances", osg::Vec4f(5.0, 50.0, 500.0, 5000.0 ) ) ),
_depthInColor( new osg::Uniform( "fg_DepthInColor", false ) )
_depthInColor( new osg::Uniform( "fg_DepthInColor", false ) ),
MaximumTextureSize(0)
{
// it's not the real root, whatever that means
_root = new osg::Group;
@ -1555,13 +1556,18 @@ FGRenderer::update( ) {
{
_splash_alpha->setDoubleValue(1.0);
GLint max_texture_size;
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &max_texture_size);
// abritrary range change as sometimes during init the device reports somewhat dubious values, so
// we know that the size must be greater than size and that probably 9999999 is unreasonably large
if (max_texture_size > 0 && max_texture_size < 9999999)
SGSceneFeatures::instance()->setMaxTextureSize(max_texture_size);
if (!MaximumTextureSize) {
osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
if (guiCamera) {
GraphicsContext *gc = guiCamera->getGraphicsContext();
osg::GLExtensions* gl2ext = gc->getState()->get<osg::GLExtensions>();
if (gl2ext) {
MaximumTextureSize = gl2ext->maxTextureSize;
SGSceneFeatures::instance()->setMaxTextureSize(MaximumTextureSize);
SG_LOG(SG_VIEW, SG_INFO, "FGRenderer:: Maximum texture size " << MaximumTextureSize);
}
}
}
return;
}
osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();

1
src/Viewer/renderer_legacy.hxx
View file

@ -151,6 +151,7 @@ protected:
size_t _numCascades;
float _cascadeFar[4];
bool _useColorForDepth;
int MaximumTextureSize;
typedef std::vector<SGPropertyChangeListener*> SGPropertyChangeListenerVec;
SGPropertyChangeListenerVec _listeners;

1
src/Viewer/renderingpipeline.hxx
View file

@ -86,6 +86,7 @@ public:
std::vector<osg::ref_ptr<Buffer> > buffers;
std::vector<osg::ref_ptr<Stage> > stages;
int MaximumTextureSize;
friend FGRenderingPipeline* flightgear::makeRenderingPipeline(const std::string& name,
const simgear::SGReaderWriterOptions* options);