lldynamictexture.cpp
上传用户:king477883
上传日期:2021-03-01
资源大小:9553k
文件大小:8k
- /**
- * @file lldynamictexture.cpp
- * @brief Implementation of LLViewerDynamicTexture class
- *
- * $LicenseInfo:firstyear=2001&license=viewergpl$
- *
- * Copyright (c) 2001-2010, Linden Research, Inc.
- *
- * Second Life Viewer Source Code
- * The source code in this file ("Source Code") is provided by Linden Lab
- * to you under the terms of the GNU General Public License, version 2.0
- * ("GPL"), unless you have obtained a separate licensing agreement
- * ("Other License"), formally executed by you and Linden Lab. Terms of
- * the GPL can be found in doc/GPL-license.txt in this distribution, or
- * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
- *
- * There are special exceptions to the terms and conditions of the GPL as
- * it is applied to this Source Code. View the full text of the exception
- * in the file doc/FLOSS-exception.txt in this software distribution, or
- * online at
- * http://secondlifegrid.net/programs/open_source/licensing/flossexception
- *
- * By copying, modifying or distributing this software, you acknowledge
- * that you have read and understood your obligations described above,
- * and agree to abide by those obligations.
- *
- * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
- * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
- * COMPLETENESS OR PERFORMANCE.
- * $/LicenseInfo$
- */
- #include "llviewerprecompiledheaders.h"
- #include "lldynamictexture.h"
- // Linden library includes
- #include "llglheaders.h"
- #include "llwindow.h" // getPosition()
- // Viewer includes
- #include "llviewerwindow.h"
- #include "llviewercamera.h"
- #include "llviewercontrol.h"
- #include "llviewertexture.h"
- #include "llvertexbuffer.h"
- #include "llviewerdisplay.h"
- #include "llrender.h"
- // static
- LLViewerDynamicTexture::instance_list_t LLViewerDynamicTexture::sInstances[ LLViewerDynamicTexture::ORDER_COUNT ];
- S32 LLViewerDynamicTexture::sNumRenders = 0;
- //-----------------------------------------------------------------------------
- // LLViewerDynamicTexture()
- //-----------------------------------------------------------------------------
- LLViewerDynamicTexture::LLViewerDynamicTexture(S32 width, S32 height, S32 components, EOrder order, BOOL clamp) :
- LLViewerTexture(width, height, components, FALSE),
- mClamp(clamp)
- {
- llassert((1 <= components) && (components <= 4));
- generateGLTexture();
- llassert( 0 <= order && order < ORDER_COUNT );
- LLViewerDynamicTexture::sInstances[ order ].insert(this);
- }
- //-----------------------------------------------------------------------------
- // LLViewerDynamicTexture()
- //-----------------------------------------------------------------------------
- LLViewerDynamicTexture::~LLViewerDynamicTexture()
- {
- for( S32 order = 0; order < ORDER_COUNT; order++ )
- {
- LLViewerDynamicTexture::sInstances[order].erase(this); // will fail in all but one case.
- }
- }
- //virtual
- S8 LLViewerDynamicTexture::getType() const
- {
- return LLViewerTexture::DYNAMIC_TEXTURE ;
- }
- //-----------------------------------------------------------------------------
- // generateGLTexture()
- //-----------------------------------------------------------------------------
- void LLViewerDynamicTexture::generateGLTexture()
- {
- LLViewerTexture::generateGLTexture() ;
- generateGLTexture(-1, 0, 0, FALSE);
- }
- void LLViewerDynamicTexture::generateGLTexture(LLGLint internal_format, LLGLenum primary_format, LLGLenum type_format, BOOL swap_bytes)
- {
- if (mComponents < 1 || mComponents > 4)
- {
- llerrs << "Bad number of components in dynamic texture: " << mComponents << llendl;
- }
-
- LLPointer<LLImageRaw> raw_image = new LLImageRaw(mFullWidth, mFullHeight, mComponents);
- if (internal_format >= 0)
- {
- setExplicitFormat(internal_format, primary_format, type_format, swap_bytes);
- }
- createGLTexture(0, raw_image, 0, TRUE, LLViewerTexture::DYNAMIC_TEX);
- setAddressMode((mClamp) ? LLTexUnit::TAM_CLAMP : LLTexUnit::TAM_WRAP);
- mGLTexturep->setGLTextureCreated(false);
- }
- //-----------------------------------------------------------------------------
- // render()
- //-----------------------------------------------------------------------------
- BOOL LLViewerDynamicTexture::render()
- {
- return FALSE;
- }
- //-----------------------------------------------------------------------------
- // preRender()
- //-----------------------------------------------------------------------------
- void LLViewerDynamicTexture::preRender(BOOL clear_depth)
- {
- {
- // force rendering to on-screen portion of frame buffer
- LLCoordScreen window_pos;
- gViewerWindow->getWindow()->getPosition( &window_pos );
- mOrigin.set(0, gViewerWindow->getWindowHeightRaw() - mFullHeight); // top left corner
- if (window_pos.mX < 0)
- {
- mOrigin.mX = -window_pos.mX;
- }
- if (window_pos.mY < 0)
- {
- mOrigin.mY += window_pos.mY;
- mOrigin.mY = llmax(mOrigin.mY, 0) ;
- }
- gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);
- }
- // Set up camera
- LLViewerCamera* camera = LLViewerCamera::getInstance();
- mCamera.setOrigin(*camera);
- mCamera.setAxes(*camera);
- mCamera.setAspect(camera->getAspect());
- mCamera.setView(camera->getView());
- mCamera.setNear(camera->getNear());
- glViewport(mOrigin.mX, mOrigin.mY, mFullWidth, mFullHeight);
- if (clear_depth)
- {
- glClear(GL_DEPTH_BUFFER_BIT);
- }
- }
- //-----------------------------------------------------------------------------
- // postRender()
- //-----------------------------------------------------------------------------
- void LLViewerDynamicTexture::postRender(BOOL success)
- {
- {
- if (success)
- {
- if(mGLTexturep.isNull())
- {
- generateGLTexture() ;
- }
- success = mGLTexturep->setSubImageFromFrameBuffer(0, 0, mOrigin.mX, mOrigin.mY, mFullWidth, mFullHeight);
- }
- }
- // restore viewport
- gViewerWindow->setup2DViewport();
- // restore camera
- LLViewerCamera* camera = LLViewerCamera::getInstance();
- camera->setOrigin(mCamera);
- camera->setAxes(mCamera);
- camera->setAspect(mCamera.getAspect());
- camera->setView(mCamera.getView());
- camera->setNear(mCamera.getNear());
- }
- //-----------------------------------------------------------------------------
- // static
- // updateDynamicTextures()
- // Calls update on each dynamic texture. Calls each group in order: "first," then "middle," then "last."
- //-----------------------------------------------------------------------------
- BOOL LLViewerDynamicTexture::updateAllInstances()
- {
- sNumRenders = 0;
- if (gGLManager.mIsDisabled)
- {
- return TRUE;
- }
- BOOL result = FALSE;
- BOOL ret = FALSE ;
- for( S32 order = 0; order < ORDER_COUNT; order++ )
- {
- for (instance_list_t::iterator iter = LLViewerDynamicTexture::sInstances[order].begin();
- iter != LLViewerDynamicTexture::sInstances[order].end(); ++iter)
- {
- LLViewerDynamicTexture *dynamicTexture = *iter;
- if (dynamicTexture->needsRender())
- {
- glClear(GL_DEPTH_BUFFER_BIT);
- gDepthDirty = TRUE;
-
-
- gGL.color4f(1,1,1,1);
- dynamicTexture->preRender(); // Must be called outside of startRender()
- result = FALSE;
- if (dynamicTexture->render())
- {
- ret = TRUE ;
- result = TRUE;
- sNumRenders++;
- }
- gGL.flush();
- LLVertexBuffer::unbind();
-
- dynamicTexture->postRender(result);
- }
- }
- }
- return ret;
- }
- //-----------------------------------------------------------------------------
- // static
- // destroyGL()
- //-----------------------------------------------------------------------------
- void LLViewerDynamicTexture::destroyGL()
- {
- for( S32 order = 0; order < ORDER_COUNT; order++ )
- {
- for (instance_list_t::iterator iter = LLViewerDynamicTexture::sInstances[order].begin();
- iter != LLViewerDynamicTexture::sInstances[order].end(); ++iter)
- {
- LLViewerDynamicTexture *dynamicTexture = *iter;
- dynamicTexture->destroyGLTexture() ;
- }
- }
- }
- //-----------------------------------------------------------------------------
- // static
- // restoreGL()
- //-----------------------------------------------------------------------------
- void LLViewerDynamicTexture::restoreGL()
- {
- if (gGLManager.mIsDisabled)
- {
- return ;
- }
-
- for( S32 order = 0; order < ORDER_COUNT; order++ )
- {
- for (instance_list_t::iterator iter = LLViewerDynamicTexture::sInstances[order].begin();
- iter != LLViewerDynamicTexture::sInstances[order].end(); ++iter)
- {
- LLViewerDynamicTexture *dynamicTexture = *iter;
- dynamicTexture->restoreGLTexture() ;
- }
- }
- }