476 lines
17 KiB
C++
476 lines
17 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 "KRTextureKTX.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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m_boundTextureHandles[iTexture] = 0;
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}
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m_memoryTransferredThisFrame = 0;
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m_streamerComplete = true;
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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, 0.0f, KRTexture::TEXTURE_USAGE_NONE);
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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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} else if(strcmp(szExtension, "ktx") == 0) {
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pTexture = new KRTextureKTX(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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// Defer resolving the texture cube until its referenced textures are ready
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const char *SUFFIXES[6] = {
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"_positive_x",
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"_negative_x",
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"_positive_y",
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"_negative_y",
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"_positive_z",
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"_negative_z"
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};
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bool found_all = true;
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for(int i=0; i<6; i++) {
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std::string faceName = lowerName + SUFFIXES[i];
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KRTexture *faceTexture = dynamic_cast<KRTexture2D *>(getContext().getTextureManager()->getTexture(faceName));
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if(faceTexture == NULL) {
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found_all = false;
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}
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}
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if(found_all) {
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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 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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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.compare(0, 8, "animate:", 0, 8) == 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", name.c_str());
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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, float lod_coverage, KRTexture::texture_usage_t textureUsage) {
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bool is_animated = false;
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if(pTexture) {
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pTexture->resetPoolExpiry(lod_coverage, textureUsage);
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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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if(pTexture != NULL) {
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_setActiveTexture(iTextureUnit);
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pTexture->bind(iTextureUnit);
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} else {
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selectTexture(GL_TEXTURE_2D, iTextureUnit, 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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bool KRTextureManager::selectTexture(GLenum target, int iTextureUnit, int iTextureHandle)
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{
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if(m_boundTextureHandles[iTextureUnit] != iTextureHandle) {
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m_boundTextureHandles[iTextureUnit] = iTextureHandle;
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_setActiveTexture(iTextureUnit);
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glBindTexture(target, iTextureHandle);
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return true;
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} else {
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return false;
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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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// TODO - Implement proper double-buffering to reduce copy operations
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m_streamerFenceMutex.lock();
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if(m_streamerComplete) {
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assert(m_activeTextures_streamer_copy.size() == 0); // The streamer should have emptied this if it really did complete
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const long KRENGINE_TEXTURE_EXPIRY_FRAMES = 10;
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std::set<KRTexture *> expiredTextures;
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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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activeTexture->_swapHandles();
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if(activeTexture->getLastFrameUsed() + KRENGINE_TEXTURE_EXPIRY_FRAMES < getContext().getCurrentFrame()) {
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// Expire textures that haven't been used in a long time
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expiredTextures.insert(activeTexture);
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activeTexture->releaseHandles();
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} else {
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float priority = activeTexture->getStreamPriority();
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m_activeTextures_streamer_copy.push_back(std::pair<float, KRTexture *>(priority, activeTexture));
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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_activeTextures.erase(*itr);
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}
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if(m_activeTextures_streamer_copy.size() > 0) {
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m_streamerComplete = false;
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}
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}
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m_streamerFenceMutex.unlock();
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m_memoryTransferredThisFrame = 0;
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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(0.0f, KRTexture::TEXTURE_USAGE_NONE); // 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::doStreaming(long &memoryRemaining, long &memoryRemainingThisFrame)
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{
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// TODO - Implement proper double-buffering to reduce copy operations
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m_streamerFenceMutex.lock();
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m_activeTextures_streamer = std::move(m_activeTextures_streamer_copy);
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m_streamerFenceMutex.unlock();
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if(m_activeTextures_streamer.size() > 0) {
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balanceTextureMemory(memoryRemaining, memoryRemainingThisFrame);
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m_streamerFenceMutex.lock();
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m_streamerComplete = true;
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m_streamerFenceMutex.unlock();
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} else {
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memoryRemaining -= getMemUsed();
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}
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}
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void KRTextureManager::balanceTextureMemory(long &memoryRemaining, long &memoryRemainingThisFrame)
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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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/*
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NEW ALGORITHM:
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Textures are assigned a “weight” by tuneable criteria:
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- Area of screen coverage taken by objects containing material (more accurate and generic than distance)
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- Type of texture (separate weight for normal, diffuse, spec maps)
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- Last used time (to keep textures loaded for recently seen objects that are outside of the view frustum)
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Those factors combine together to give a “weight”, which represents a proportion relative to all other textures weights
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Mipmap levels are stripped off of each texture until they occupy the amount of memory they should proportionally have
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This is in contrast to the global ceiling of texture resolution that slowly drops until the textures fit
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*/
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// ---------------
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//long MAX_STREAM_TIME = 66;
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//long startTime = getContext().getAbsoluteTimeMilliseconds();
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std::sort(m_activeTextures_streamer.begin(), m_activeTextures_streamer.end(), std::greater<std::pair<float, KRTexture *>>());
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for(auto itr=m_activeTextures_streamer.begin(); itr != m_activeTextures_streamer.end(); itr++) {
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KRTexture *texture = (*itr).second;
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int min_mip_level = KRMAX(getContext().KRENGINE_MIN_TEXTURE_DIM, texture->getMinMipMap());
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long minLodMem = texture->getMemRequiredForSize(min_mip_level);
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memoryRemaining -= minLodMem;
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if(memoryRemainingThisFrame > minLodMem && texture->getNewLodMaxDim() < min_mip_level) {
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memoryRemainingThisFrame -= minLodMem;
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texture->resize(min_mip_level);
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}
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}
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//long minMipTime = getContext().getAbsoluteTimeMilliseconds() - startTime;
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std::vector<int> mipPercents = {75, 75, 50, 50, 50};
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int mip_drop = -1;
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auto mip_itr = mipPercents.begin();
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long memoryRemainingThisMip = 0;
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for(auto itr=m_activeTextures_streamer.begin(); itr != m_activeTextures_streamer.end(); itr++) {
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if(memoryRemainingThisMip <= 0) {
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if(mip_itr == mipPercents.end()) {
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break;
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} else {
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memoryRemainingThisMip = memoryRemaining / 100L * (long)(*mip_itr);
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mip_drop++;
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mip_itr++;
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}
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}
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KRTexture *texture = (*itr).second;
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int min_mip_level = KRMAX(getContext().KRENGINE_MIN_TEXTURE_DIM, texture->getMinMipMap());
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int max_mip_level = KRMIN(getContext().KRENGINE_MAX_TEXTURE_DIM, texture->getMaxMipMap());
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int target_mip_level = (max_mip_level >> mip_drop);
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long targetMem = texture->getMemRequiredForSize(target_mip_level);
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long additionalMemRequired = targetMem - texture->getMemRequiredForSize(min_mip_level);
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memoryRemainingThisMip -= additionalMemRequired;
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memoryRemaining -= additionalMemRequired;
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if(memoryRemainingThisMip > 0 && memoryRemainingThisFrame > targetMem) {
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int current_mip_level = texture->getNewLodMaxDim();
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if(current_mip_level == (target_mip_level >> 1) || target_mip_level < current_mip_level) {
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memoryRemainingThisFrame -= targetMem;
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texture->resize(target_mip_level);
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} else if(current_mip_level == (target_mip_level >> 2)) {
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memoryRemainingThisFrame -= texture->getMemRequiredForSize(target_mip_level >> 1);
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texture->resize(target_mip_level >> 1);
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} else if(current_mip_level < (target_mip_level >> 2)) {
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memoryRemainingThisFrame -= texture->getMemRequiredForSize(target_mip_level >> 2);
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texture->resize(target_mip_level >> 2);
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}
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}
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//if(getContext().getAbsoluteTimeMilliseconds() - startTime > MAX_STREAM_TIME) {
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// return; // Bail out early if we spend too long
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//}
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}
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glFlush();
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//long streamerTime = getContext().getAbsoluteTimeMilliseconds() - startTime;
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//fprintf(stderr, "%i / %i\n", (int)minMipTime, (int)streamerTime);
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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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//fprintf(stderr, "Texture Memory: %ld / %i\n", (long)m_textureMemUsed, KRContext::KRENGINE_GPU_MEM_MAX);
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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(bool premultiply_alpha)
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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(premultiply_alpha);
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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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} else {
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assert(false);
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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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void KRTextureManager::primeTexture(KRTexture *texture)
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{
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if(m_activeTextures.find(texture) == m_activeTextures.end()) {
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m_activeTextures.insert(texture);
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}
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}
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