image rotating function

actorid
scrawl 13 years ago
parent 62908c9ef5
commit 944654f263

@ -97,6 +97,7 @@ set(OENGINE_OGRE
${LIBDIR}/openengine/ogre/renderer.cpp
${LIBDIR}/openengine/ogre/mouselook.cpp
${LIBDIR}/openengine/ogre/fader.cpp
${LIBDIR}/openengine/ogre/imagerotate.cpp
)
set(OENGINE_GUI
${LIBDIR}/openengine/gui/events.cpp

@ -0,0 +1,74 @@
#include "imagerotate.hpp"
#include <OgreRoot.h>
#include <OgreSceneManager.h>
#include <OgreImage.h>
#include <OgreTexture.h>
#include <OgreRenderTarget.h>
#include <OgreCamera.h>
#include <OgreTextureUnitState.h>
#include <OgreHardwarePixelBuffer.h>
using namespace Ogre;
using namespace OEngine::Render;
void ImageRotate::rotate(const std::string& sourceImage, const std::string& destImage, const float angle)
{
Root* root = Ogre::Root::getSingletonPtr();
SceneManager* sceneMgr = root->createSceneManager(ST_GENERIC);
Camera* camera = sceneMgr->createCamera("ImageRotateCamera");
MaterialPtr material = MaterialManager::getSingleton().create("ImageRotateMaterial", ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
material->getTechnique(0)->getPass(0)->setLightingEnabled(false);
material->getTechnique(0)->getPass(0)->setDepthCheckEnabled(false);
TextureUnitState* tus = material->getTechnique(0)->getPass(0)->createTextureUnitState(sourceImage);
Degree deg(angle);
tus->setTextureRotate(Radian(deg.valueRadians()));
tus->setTextureAddressingMode(TextureUnitState::TAM_BORDER);
tus->setTextureBorderColour(ColourValue(0, 0, 0, 0));
Rectangle2D* rect = new Rectangle2D(true);
rect->setCorners(-1.0, 1.0, 1.0, -1.0);
rect->setMaterial("ImageRotateMaterial");
// Render the background before everything else
rect->setRenderQueueGroup(RENDER_QUEUE_BACKGROUND);
// Use infinite AAB to always stay visible
AxisAlignedBox aabInf;
aabInf.setInfinite();
rect->setBoundingBox(aabInf);
// Attach background to the scene
SceneNode* node = sceneMgr->getRootSceneNode()->createChildSceneNode();
node->attachObject(rect);
// retrieve image width and height
TexturePtr sourceTexture = TextureManager::getSingleton().getByName(sourceImage);
unsigned int width = sourceTexture->getWidth();
unsigned int height = sourceTexture->getHeight();
TexturePtr destTexture = TextureManager::getSingleton().createManual(
"ImageRotateDestTexture",
ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME,
TEX_TYPE_2D,
width, height,
0,
PF_R8G8B8,
TU_RENDERTARGET);
RenderTarget* rtt = destTexture->getBuffer()->getRenderTarget();
rtt->setAutoUpdated(false);
Viewport* vp = rtt->addViewport(camera);
vp->setOverlaysEnabled(false);
vp->setShadowsEnabled(false);
rtt->update();
rtt->writeContentsToFile(destImage);
// remove all the junk we've created
TextureManager::getSingleton().remove("ImageRotateDestTexture");
MaterialManager::getSingleton().remove("ImageRotateMaterial");
root->destroySceneManager(sceneMgr);
delete rect;
}

@ -0,0 +1,27 @@
#ifndef OENGINE_OGRE_IMAGEROTATE_HPP
#define OENGINE_OGRE_IMAGEROTATE_HPP
#include <string>
namespace OEngine
{
namespace Render
{
/// Rotate an image by certain degrees and save as file, uses the GPU
/// Make sure Ogre Root is initialised before calling
class ImageRotate
{
public:
/**
* @param source image (file name - has to exist in an resource group)
* @param destination image (absolute file path)
* @param angle in degrees to turn
*/
static void rotate(const std::string& sourceImage, const std::string& destImage, const float angle);
};
}
}
#endif
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