388 lines
14 KiB
C++
388 lines
14 KiB
C++
//
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// KRTextureManager.cpp
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// KREngine
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//
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// Copyright 2012 Kearwood Gilbert. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other materials
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// provided with the distribution.
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//
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// THIS SOFTWARE IS PROVIDED BY KEARWOOD GILBERT ''AS IS'' AND ANY EXPRESS OR IMPLIED
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// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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// FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL KEARWOOD GILBERT OR
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// The views and conclusions contained in the software and documentation are those of the
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// authors and should not be interpreted as representing official policies, either expressed
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// or implied, of Kearwood Gilbert.
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//
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#include "KREngine-common.h"
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#include "KRTextureManager.h"
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#include "KRContext.h"
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#include "KRTexture2D.h"
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#include "KRTexturePVR.h"
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#include "KRTextureTGA.h"
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#include "KRTextureCube.h"
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#include "KRTextureAnimated.h"
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#include "KRContext.h"
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KRTextureManager::KRTextureManager(KRContext &context) : KRContextObject(context) {
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m_textureMemUsed = 0;
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for(int iTexture=0; iTexture<KRENGINE_MAX_TEXTURE_UNITS; iTexture++) {
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m_boundTextures[iTexture] = NULL;
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}
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m_memoryTransferredThisFrame = 0;
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_clearGLState();
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}
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KRTextureManager::~KRTextureManager() {
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for(unordered_map<std::string, KRTexture *>::iterator itr = m_textures.begin(); itr != m_textures.end(); ++itr){
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delete (*itr).second;
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}
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}
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void KRTextureManager::_clearGLState()
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{
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for(int i=0; i < KRENGINE_MAX_TEXTURE_UNITS; i++) {
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m_wrapModeS[i] = 0;
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m_wrapModeT[i] = 0;
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m_maxAnisotropy[i] = -1.0f;
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selectTexture(i, NULL);
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}
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m_iActiveTexture = -1;
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}
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void KRTextureManager::_setActiveTexture(int i)
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{
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if(m_iActiveTexture != i) {
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m_iActiveTexture = i;
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GLDEBUG(glActiveTexture(GL_TEXTURE0 + i));
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}
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}
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void KRTextureManager::_setWrapModeS(GLuint i, GLuint wrap_mode)
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{
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if(m_wrapModeS[i] != wrap_mode) {
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_setActiveTexture(i);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrap_mode);
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m_wrapModeS[i] = wrap_mode;
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}
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}
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void KRTextureManager::_setMaxAnisotropy(int i, float max_anisotropy)
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{
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if(m_maxAnisotropy[i] != max_anisotropy) {
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_setActiveTexture(i);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, max_anisotropy);
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m_maxAnisotropy[i] = max_anisotropy;
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}
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}
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void KRTextureManager::setMaxAnisotropy(float max_anisotropy)
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{
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for(int i=0; i < KRENGINE_MAX_TEXTURE_UNITS; i++) {
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_setMaxAnisotropy(i, max_anisotropy);
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}
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}
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void KRTextureManager::_setWrapModeT(GLuint i, GLuint wrap_mode)
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{
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if(m_wrapModeT[i] != wrap_mode) {
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_setActiveTexture(i);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrap_mode);
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m_wrapModeT[i] = wrap_mode;
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}
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}
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KRTexture *KRTextureManager::loadTexture(const char *szName, const char *szExtension, KRDataBlock *data) {
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KRTexture *pTexture = NULL;
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std::string lowerName = szName;
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std::transform(lowerName.begin(), lowerName.end(),
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lowerName.begin(), ::tolower);
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std::string lowerExtension = szExtension;
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std::transform(lowerExtension.begin(), lowerExtension.end(),
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lowerExtension.begin(), ::tolower);
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if(strcmp(szExtension, "pvr") == 0) {
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pTexture = new KRTexturePVR(getContext(), data, szName);
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} else if(strcmp(szExtension, "tga") == 0) {
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pTexture = new KRTextureTGA(getContext(), data, szName);
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}
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if(pTexture) {
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m_textures[lowerName] = pTexture;
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}
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return pTexture;
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}
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KRTexture *KRTextureManager::getTextureCube(const char *szName) {
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std::string lowerName = szName;
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std::transform(lowerName.begin(), lowerName.end(),
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lowerName.begin(), ::tolower);
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unordered_map<std::string, KRTexture *>::iterator itr = m_textures.find(lowerName);
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if(itr == m_textures.end()) {
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KRTextureCube *pTexture = new KRTextureCube(getContext(), lowerName);
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m_textures[lowerName] = pTexture;
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return pTexture;
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} else {
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return (*itr).second;
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}
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}
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KRTexture *KRTextureManager::getTexture(const std::string &name) {
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std::string lowerName = name;
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std::transform(lowerName.begin(), lowerName.end(),
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lowerName.begin(), ::tolower);
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unordered_map<std::string, KRTexture *>::iterator itr = m_textures.find(lowerName);
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if(itr == m_textures.end()) {
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if(lowerName.length() <= 8) {
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return NULL;
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} else if(lowerName.substr(8).compare("animate:") == 0) {
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// This is an animated texture, create KRTextureAnimated's on-demand
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KRTextureAnimated *pTexture = new KRTextureAnimated(getContext(), lowerName);
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m_textures[lowerName] = pTexture;
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return pTexture;
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} else {
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// Not found
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//fprintf(stderr, "ERROR: Texture not found: %s\n", szName);
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return NULL;
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}
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} else {
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return (*itr).second;
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}
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}
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void KRTextureManager::selectTexture(int iTextureUnit, KRTexture *pTexture) {
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bool is_animated = false;
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if(pTexture) {
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if(pTexture->isAnimated()) is_animated = true;
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}
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if(m_boundTextures[iTextureUnit] != pTexture || is_animated) {
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_setActiveTexture(iTextureUnit);
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if(pTexture != NULL) {
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m_poolTextures.erase(pTexture);
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if(m_activeTextures.find(pTexture) == m_activeTextures.end()) {
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m_activeTextures.insert(pTexture);
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}
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pTexture->bind(iTextureUnit);
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} else {
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GLDEBUG(glBindTexture(GL_TEXTURE_2D, 0));
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}
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m_boundTextures[iTextureUnit] = pTexture;
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}
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}
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long KRTextureManager::getMemUsed() {
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return m_textureMemUsed;
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}
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long KRTextureManager::getMemActive() {
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long mem_active = 0;
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for(std::set<KRTexture *>::iterator itr=m_activeTextures.begin(); itr != m_activeTextures.end(); itr++) {
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KRTexture *activeTexture = *itr;
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mem_active += activeTexture->getMemSize();
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}
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return mem_active;
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}
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void KRTextureManager::startFrame(float deltaTime)
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{
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_clearGLState();
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m_memoryTransferredThisFrame = 0;
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balanceTextureMemory();
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rotateBuffers();
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}
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void KRTextureManager::endFrame(float deltaTime)
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{
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for(int iTexture=0; iTexture < KRENGINE_MAX_TEXTURE_UNITS; iTexture++) {
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if(m_boundTextures[iTexture]) {
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m_boundTextures[iTexture]->resetPoolExpiry(); // Even if the same texture is bound, ensure that they don't expire from the texture pool while in use
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}
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}
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}
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void KRTextureManager::balanceTextureMemory()
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{
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// Balance texture memory by reducing and increasing the maximum mip-map level of both active and inactive textures
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// Favour performance over maximum texture resolution when memory is insufficient for textures at full resolution.
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// Determine the additional amount of memory required in order to resize all active textures to the maximum size
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long wantedTextureMem = 0;
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for(std::set<KRTexture *>::iterator itr=m_activeTextures.begin(); itr != m_activeTextures.end(); itr++) {
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KRTexture *activeTexture = *itr;
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wantedTextureMem = activeTexture->getMemRequiredForSize(getContext().KRENGINE_MAX_TEXTURE_DIM) - activeTexture->getMemSize();
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}
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// Determine how much memory we need to free up
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long memoryDeficit = wantedTextureMem - (getContext().KRENGINE_MAX_TEXTURE_MEM - getMemUsed());
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// Determine how many mip map levels we need to strip off of inactive textures to free the memory we need
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long maxDimInactive = getContext().KRENGINE_MAX_TEXTURE_DIM;
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long potentialMemorySaving = 0;
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while(potentialMemorySaving < memoryDeficit && maxDimInactive > getContext().KRENGINE_MIN_TEXTURE_DIM) {
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maxDimInactive = maxDimInactive >> 1;
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potentialMemorySaving = 0;
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for(std::set<KRTexture *>::iterator itr=m_poolTextures.begin(); itr != m_poolTextures.end(); itr++) {
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KRTexture *poolTexture = *itr;
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long potentialMemoryDelta = poolTexture->getMemRequiredForSize(maxDimInactive) - poolTexture->getMemSize();
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if(potentialMemoryDelta < 0) {
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potentialMemorySaving += -potentialMemoryDelta;
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}
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}
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}
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// Strip off mipmap levels of inactive textures to free up memory
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long inactive_texture_mem_used_target = 0;
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for(std::set<KRTexture *>::iterator itr=m_poolTextures.begin(); itr != m_poolTextures.end(); itr++) {
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KRTexture *poolTexture = *itr;
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long potentialMemoryDelta = poolTexture->getMemRequiredForSize(maxDimInactive) - poolTexture->getMemSize();
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if(potentialMemoryDelta < 0) {
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poolTexture->resize(maxDimInactive);
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inactive_texture_mem_used_target += poolTexture->getMemRequiredForSize(maxDimInactive);
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} else {
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inactive_texture_mem_used_target += poolTexture->getMemSize();
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}
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}
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// Determine the maximum mipmap level for the active textures we can achieve with the memory that is available
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long memory_available = 0;
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long maxDimActive = getContext().KRENGINE_MAX_TEXTURE_DIM;
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while(memory_available <= 0 && maxDimActive >= getContext().KRENGINE_MIN_TEXTURE_DIM) {
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memory_available = getContext().KRENGINE_MAX_TEXTURE_MEM - inactive_texture_mem_used_target;
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for(std::set<KRTexture *>::iterator itr=m_activeTextures.begin(); itr != m_activeTextures.end() && memory_available > 0; itr++) {
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KRTexture *activeTexture = *itr;
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memory_available -= activeTexture->getMemRequiredForSize(maxDimActive);
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}
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if(memory_available <= 0) {
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maxDimActive = maxDimActive >> 1; // Try the next smaller mipmap size
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}
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}
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// Resize active textures to balance the memory usage and mipmap levels
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for(std::set<KRTexture *>::iterator itr=m_activeTextures.begin(); itr != m_activeTextures.end() && memory_available > 0; itr++) {
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KRTexture *activeTexture = *itr;
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activeTexture->resize(maxDimActive);
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}
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//fprintf(stderr, "Active mipmap size: %i Inactive mapmap size: %i\n", (int)maxDimActive, (int)maxDimInactive);
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}
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void KRTextureManager::rotateBuffers()
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{
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const long KRENGINE_TEXTURE_EXPIRY_FRAMES = 120;
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// ----====---- Expire textures that haven't been used in a long time ----====----
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std::set<KRTexture *> expiredTextures;
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for(std::set<KRTexture *>::iterator itr=m_poolTextures.begin(); itr != m_poolTextures.end(); itr++) {
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KRTexture *poolTexture = *itr;
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if(poolTexture->getLastFrameUsed() + KRENGINE_TEXTURE_EXPIRY_FRAMES < getContext().getCurrentFrame()) {
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expiredTextures.insert(poolTexture);
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poolTexture->releaseHandle();
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}
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}
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for(std::set<KRTexture *>::iterator itr=expiredTextures.begin(); itr != expiredTextures.end(); itr++) {
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m_poolTextures.erase(*itr);
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}
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// ----====---- Swap the buffers ----====----
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m_poolTextures.insert(m_activeTextures.begin(), m_activeTextures.end());
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m_activeTextures.clear();
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}
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long KRTextureManager::getMemoryTransferedThisFrame()
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{
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return m_memoryTransferredThisFrame;
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}
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void KRTextureManager::addMemoryTransferredThisFrame(long memoryTransferred)
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{
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m_memoryTransferredThisFrame += memoryTransferred;
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}
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void KRTextureManager::memoryChanged(long memoryDelta)
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{
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m_textureMemUsed += memoryDelta;
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}
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unordered_map<std::string, KRTexture *> &KRTextureManager::getTextures()
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{
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return m_textures;
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}
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void KRTextureManager::compress()
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{
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std::vector<KRTexture *> textures_to_remove;
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std::vector<KRTexture *> textures_to_add;
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for(unordered_map<std::string, KRTexture *>::iterator itr=m_textures.begin(); itr != m_textures.end(); itr++) {
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KRTexture *texture = (*itr).second;
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KRTexture *compressed_texture = texture->compress();
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if(compressed_texture) {
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textures_to_remove.push_back(texture);
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textures_to_add.push_back(compressed_texture);
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}
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}
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for(std::vector<KRTexture *>::iterator itr = textures_to_remove.begin(); itr != textures_to_remove.end(); itr++) {
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KRTexture *texture = *itr;
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std::string lowerName = texture->getName();
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std::transform(lowerName.begin(), lowerName.end(),
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lowerName.begin(), ::tolower);
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m_textures.erase(lowerName);
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delete texture;
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}
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for(std::vector<KRTexture *>::iterator itr = textures_to_add.begin(); itr != textures_to_add.end(); itr++) {
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KRTexture *texture = *itr;
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std::string lowerName = texture->getName();
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std::transform(lowerName.begin(), lowerName.end(),
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lowerName.begin(), ::tolower);
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m_textures[lowerName] = texture;
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}
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}
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std::set<KRTexture *> &KRTextureManager::getActiveTextures()
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{
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return m_activeTextures;
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}
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std::set<KRTexture *> &KRTextureManager::getPoolTextures()
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{
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return m_poolTextures;
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}
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