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#include "myguitexture.hpp"
#include <stdexcept>
#include <osg/StateSet>
#include <osg/Texture2D>
#include <components/debug/debuglog.hpp>
#include <components/resource/imagemanager.hpp>
namespace MyGUIPlatform
{
OSGTexture::OSGTexture(const std::string& name, Resource::ImageManager* imageManager)
: mName(name)
, mImageManager(imageManager)
, mFormat(MyGUI::PixelFormat::Unknow)
, mUsage(MyGUI::TextureUsage::Default)
, mNumElemBytes(0)
, mWidth(0)
, mHeight(0)
{
}
OSGTexture::OSGTexture(osg::Texture2D* texture, osg::StateSet* injectState)
: mImageManager(nullptr)
, mTexture(texture)
, mInjectState(injectState)
, mFormat(MyGUI::PixelFormat::Unknow)
, mUsage(MyGUI::TextureUsage::Default)
, mNumElemBytes(0)
, mWidth(texture->getTextureWidth())
, mHeight(texture->getTextureHeight())
{
}
OSGTexture::~OSGTexture() {}
void OSGTexture::createManual(int width, int height, MyGUI::TextureUsage usage, MyGUI::PixelFormat format)
{
GLenum glfmt = GL_NONE;
size_t numelems = 0;
switch (format.getValue())
{
case MyGUI::PixelFormat::L8:
glfmt = GL_LUMINANCE;
numelems = 1;
break;
case MyGUI::PixelFormat::L8A8:
glfmt = GL_LUMINANCE_ALPHA;
numelems = 2;
break;
case MyGUI::PixelFormat::R8G8B8:
glfmt = GL_RGB;
numelems = 3;
break;
case MyGUI::PixelFormat::R8G8B8A8:
glfmt = GL_RGBA;
numelems = 4;
break;
}
if (glfmt == GL_NONE)
throw std::runtime_error("Texture format not supported");
mTexture = new osg::Texture2D();
mTexture->setTextureSize(width, height);
mTexture->setSourceFormat(glfmt);
mTexture->setSourceType(GL_UNSIGNED_BYTE);
mWidth = width;
mHeight = height;
mTexture->setFilter(osg::Texture::MIN_FILTER, osg::Texture::LINEAR);
mTexture->setFilter(osg::Texture::MAG_FILTER, osg::Texture::LINEAR);
mTexture->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
mTexture->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
mFormat = format;
mUsage = usage;
mNumElemBytes = numelems;
}
void OSGTexture::destroy()
{
mTexture = nullptr;
mFormat = MyGUI::PixelFormat::Unknow;
mUsage = MyGUI::TextureUsage::Default;
mNumElemBytes = 0;
mWidth = 0;
mHeight = 0;
}
void OSGTexture::loadFromFile(const std::string& fname)
{
if (!mImageManager)
throw std::runtime_error("No imagemanager set");
osg::ref_ptr<osg::Image> image(mImageManager->getImage(VFS::Path::Normalized(fname)));
mTexture = new osg::Texture2D(image);
mTexture->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
mTexture->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
mTexture->setTextureWidth(image->s());
mTexture->setTextureHeight(image->t());
// disable mip-maps
mTexture->setFilter(osg::Texture2D::MIN_FILTER, osg::Texture2D::LINEAR);
mWidth = image->s();
mHeight = image->t();
mUsage = MyGUI::TextureUsage::Static;
}
void OSGTexture::saveToFile(const std::string& fname)
{
Log(Debug::Warning) << "Would save image to file " << fname;
}
void* OSGTexture::lock(MyGUI::TextureUsage /*access*/)
{
if (!mTexture.valid())
throw std::runtime_error("Texture is not created");
if (mLockedImage.valid())
throw std::runtime_error("Texture already locked");
mLockedImage = new osg::Image();
mLockedImage->allocateImage(mTexture->getTextureWidth(), mTexture->getTextureHeight(),
mTexture->getTextureDepth(), mTexture->getSourceFormat(), mTexture->getSourceType());
return mLockedImage->data();
}
void OSGTexture::unlock()
{
if (!mLockedImage.valid())
throw std::runtime_error("Texture not locked");
mLockedImage->flipVertical();
// mTexture might be in use by the draw thread, so create a new texture instead and use that.
osg::ref_ptr<osg::Texture2D> newTexture = new osg::Texture2D;
newTexture->setTextureSize(getWidth(), getHeight());
newTexture->setSourceFormat(mTexture->getSourceFormat());
newTexture->setSourceType(mTexture->getSourceType());
newTexture->setFilter(osg::Texture::MIN_FILTER, mTexture->getFilter(osg::Texture::MIN_FILTER));
newTexture->setFilter(osg::Texture::MAG_FILTER, mTexture->getFilter(osg::Texture::MAG_FILTER));
newTexture->setWrap(osg::Texture::WRAP_S, mTexture->getWrap(osg::Texture::WRAP_S));
newTexture->setWrap(osg::Texture::WRAP_T, mTexture->getWrap(osg::Texture::WRAP_T));
newTexture->setImage(mLockedImage.get());
// Tell the texture it can get rid of the image for static textures (since
// they aren't expected to update much at all).
newTexture->setUnRefImageDataAfterApply(mUsage.isValue(MyGUI::TextureUsage::Static) ? true : false);
mTexture = newTexture;
mLockedImage = nullptr;
}
// Render-to-texture not currently implemented.
MyGUI::IRenderTarget* OSGTexture::getRenderTarget()
{
return nullptr;
}
void OSGTexture::setShader(const std::string& /*shaderName*/)
{
Log(Debug::Warning) << "OSGTexture::setShader is not implemented";
}
}
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