forked from mirror/openmw-tes3mp
added a utility for creating texture atlas at runtime
scrawl
13 years ago
parent
ad5753ba91
commit
a4d6d1baff
@ -0,0 +1,27 @@
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[settings]
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size_x = 512
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size_y = 512
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[tx_menubook_close_idle.dds]
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x = 0
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y = 0
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[tx_menubook_close_over.dds]
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x = 128
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y = 0
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[tx_menubook_close_pressed.dds]
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x = 256
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y = 0
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[tx_menubook_take_idle.dds]
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x = 384
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y = 0
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[tx_menubook_take_over.dds]
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x = 0
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y = 32
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[tx_menubook_take_pressed.dds]
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x = 128
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y = 32
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@ -0,0 +1,113 @@
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#include "atlas.hpp"
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#include <OgreRoot.h>
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#include <OgreSceneManager.h>
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#include <OgreImage.h>
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#include <OgreTexture.h>
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#include <OgreRenderTarget.h>
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#include <OgreCamera.h>
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#include <OgreTextureUnitState.h>
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#include <OgreHardwarePixelBuffer.h>
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#include <OgreConfigFile.h>
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#include <OgreStringConverter.h>
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using namespace Ogre;
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using namespace OEngine::Render;
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void Atlas::createFromFile (const std::string& filename, const std::string& textureName, const std::string& texturePrefix)
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{
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ConfigFile file;
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file.load(filename, ResourceGroupManager::AUTODETECT_RESOURCE_GROUP_NAME, "\t:=", true);
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Root* root = Ogre::Root::getSingletonPtr();
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SceneManager* sceneMgr = root->createSceneManager(ST_GENERIC);
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Camera* camera = sceneMgr->createCamera("AtlasCamera");
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int width = StringConverter::parseInt(file.getSetting("size_x", "settings"));
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int height = StringConverter::parseInt(file.getSetting("size_y", "settings"));
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std::vector<Rectangle2D*> rectangles;
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int i = 0;
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ConfigFile::SectionIterator seci = file.getSectionIterator();
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while (seci.hasMoreElements())
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{
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Ogre::String sectionName = seci.peekNextKey();
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seci.getNext();
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if (sectionName == "settings" || sectionName == "")
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continue;
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MaterialPtr material = MaterialManager::getSingleton().create("AtlasMaterial" + StringConverter::toString(i), ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
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material->getTechnique(0)->getPass(0)->setLightingEnabled(false);
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material->getTechnique(0)->getPass(0)->setDepthCheckEnabled(false);
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TextureUnitState* tus = material->getTechnique(0)->getPass(0)->createTextureUnitState(texturePrefix + sectionName);
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tus->setTextureBorderColour(ColourValue(0, 0, 0, 0));
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Rectangle2D* rect = new Rectangle2D(true);
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rect->setMaterial("AtlasMaterial" + StringConverter::toString(i));
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rect->setRenderQueueGroup(RENDER_QUEUE_BACKGROUND);
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int x = StringConverter::parseInt(file.getSetting("x", sectionName));
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int y = StringConverter::parseInt(file.getSetting("y", sectionName));
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TexturePtr texture = TextureManager::getSingleton().getByName(texturePrefix + sectionName);
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if (texture.isNull())
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{
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std::cerr << "OEngine::Render::Atlas: Can't find texture " << texturePrefix + sectionName << ", skipping..." << std::endl;
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continue;
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}
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int textureWidth = texture->getWidth();
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int textureHeight = texture->getHeight();
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float left = x/float(width) * 2 - 1;
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float top = (1-(y/float(height))) * 2 - 1;
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float right = ((x+textureWidth))/float(width) * 2 - 1;
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float bottom = (1-((y+textureHeight)/float(height))) * 2 - 1;
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rect->setCorners(left, top, right, bottom);
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// Use infinite AAB to always stay visible
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AxisAlignedBox aabInf;
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aabInf.setInfinite();
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rect->setBoundingBox(aabInf);
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// Attach background to the scene
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SceneNode* node = sceneMgr->getRootSceneNode()->createChildSceneNode();
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node->attachObject(rect);
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rectangles.push_back(rect);
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++i;
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}
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TexturePtr destTexture = TextureManager::getSingleton().createManual(
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textureName,
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ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME,
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TEX_TYPE_2D,
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width, height,
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0,
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PF_FLOAT16_RGBA,
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TU_RENDERTARGET);
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RenderTarget* rtt = destTexture->getBuffer()->getRenderTarget();
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rtt->setAutoUpdated(false);
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Viewport* vp = rtt->addViewport(camera);
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vp->setOverlaysEnabled(false);
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vp->setShadowsEnabled(false);
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vp->setBackgroundColour(ColourValue(0,0,0,0));
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rtt->update();
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// remove all the junk we've created
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for (std::vector<Rectangle2D*>::iterator it=rectangles.begin();
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it!=rectangles.end(); ++it)
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{
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delete (*it);
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}
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while (i > 0)
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{
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MaterialManager::getSingleton().remove("AtlasMaterial" + StringConverter::toString(i-1));
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--i;
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}
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root->destroySceneManager(sceneMgr);
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}
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@ -0,0 +1,27 @@
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#ifndef OENGINE_OGRE_ATLAS_HPP
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#define OENGINE_OGRE_ATLAS_HPP
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#include <string>
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namespace OEngine
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{
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namespace Render
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{
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/// \brief Creates a texture atlas at runtime
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class Atlas
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{
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public:
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/**
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* @param absolute path to file that specifies layout of the texture (positions of the textures it contains)
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* @param name of the destination texture to save to (in memory)
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* @param texture directory prefix
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*/
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static void createFromFile (const std::string& filename, const std::string& textureName, const std::string& texturePrefix="textures\\");
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};
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}
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}
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#endif
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