void CCPrioritizedTextureManager::reduceMemory(size_t limitBytes, CCResourceProvider* resourceProvider)
{
if (memoryUseBytes() <= limitBytes)
return;
// Destroy backings until we are below the limit,
// or until all backings remaining are above the cutoff.
while (memoryUseBytes() > limitBytes && m_backings.size() > 0) {
BackingSet::iterator it = m_backings.begin();
if ((*it)->owner() && (*it)->owner()->isAbovePriorityCutoff())
break;
destroyBacking((*it), resourceProvider);
}
}
unsigned TextureManager::requestTexture(TextureToken token, IntSize size, unsigned format, bool* newTexture)
{
if (size.width() > m_maxTextureSize || size.height() > m_maxTextureSize)
return 0;
TextureMap::iterator it = m_textures.find(token);
if (it != m_textures.end()) {
ASSERT(it->second.size != size || it->second.format != format);
removeTexture(token, it->second);
}
size_t memoryRequiredBytes = memoryUseBytes(size, format);
if (memoryRequiredBytes > m_memoryLimitBytes || !reduceMemoryToLimit(m_memoryLimitBytes - memoryRequiredBytes))
return 0;
unsigned textureId = m_context->createTexture();
GLC(m_context.get(), textureId = m_context->createTexture());
GLC(m_context.get(), m_context->bindTexture(GraphicsContext3D::TEXTURE_2D, textureId));
// Do basic linear filtering on resize.
GLC(m_context.get(), m_context->texParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_MIN_FILTER, GraphicsContext3D::LINEAR));
GLC(m_context.get(), m_context->texParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_MAG_FILTER, GraphicsContext3D::LINEAR));
// NPOT textures in GL ES only work when the wrap mode is set to GraphicsContext3D::CLAMP_TO_EDGE.
GLC(m_context.get(), m_context->texParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_WRAP_S, GraphicsContext3D::CLAMP_TO_EDGE));
GLC(m_context.get(), m_context->texParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_WRAP_T, GraphicsContext3D::CLAMP_TO_EDGE));
GLC(m_context.get(), m_context->texImage2DResourceSafe(GraphicsContext3D::TEXTURE_2D, 0, format, size.width(), size.height(), 0, format, GraphicsContext3D::UNSIGNED_BYTE));
TextureInfo info;
info.size = size;
info.format = format;
info.textureId = textureId;
info.isProtected = true;
addTexture(token, info);
return textureId;
}
bool TextureManager::requestTexture(TextureToken token, IntSize size, unsigned format)
{
if (size.width() > m_maxTextureSize || size.height() > m_maxTextureSize)
return false;
TextureMap::iterator it = m_textures.find(token);
if (it != m_textures.end()) {
ASSERT(it->second.size != size || it->second.format != format);
removeTexture(token, it->second);
}
size_t memoryRequiredBytes = memoryUseBytes(size, format);
if (memoryRequiredBytes > m_maxMemoryLimitBytes)
return false;
reduceMemoryToLimit(m_maxMemoryLimitBytes - memoryRequiredBytes);
if (m_memoryUseBytes + memoryRequiredBytes > m_maxMemoryLimitBytes)
return false;
TextureInfo info;
info.size = size;
info.format = format;
info.textureId = 0;
info.isProtected = true;
#ifndef NDEBUG
info.allocator = 0;
#endif
addTexture(token, info);
return true;
}
void TextureManager::addTexture(TextureToken token, TextureInfo info)
{
ASSERT(!m_textureLRUSet.contains(token));
ASSERT(!m_textures.contains(token));
m_memoryUseBytes += memoryUseBytes(info.size, info.format);
m_textures.set(token, info);
m_textureLRUSet.add(token);
}
void TextureManager::removeTexture(TextureToken token, TextureInfo info)
{
ASSERT(m_textureLRUSet.contains(token));
ASSERT(m_textures.contains(token));
m_memoryUseBytes -= memoryUseBytes(info.size, info.format);
m_textures.remove(token);
ASSERT(m_textureLRUSet.contains(token));
m_textureLRUSet.remove(token);
GLC(m_context.get(), m_context->deleteTexture(info.textureId));
}
void CCPrioritizedTextureManager::reduceMemory(CCResourceProvider* resourceProvider)
{
reduceMemory(m_memoryAvailableBytes, resourceProvider);
ASSERT(memoryUseBytes() <= maxMemoryLimitBytes());
// We currently collect backings from deleted textures for later recycling.
// However, if we do that forever we will always use the max limit even if
// we really need very little memory. This should probably be solved by reducing the
// limit externally, but until then this just does some "clean up" of unused
// backing textures (any more than 10%).
size_t wastedMemory = 0;
for (BackingSet::iterator it = m_backings.begin(); it != m_backings.end(); ++it) {
if ((*it)->owner())
break;
wastedMemory += (*it)->bytes();
}
size_t tenPercentOfMemory = m_memoryAvailableBytes / 10;
if (wastedMemory <= tenPercentOfMemory)
return;
reduceMemory(memoryUseBytes() - (wastedMemory - tenPercentOfMemory), resourceProvider);
}
void TextureManager::removeTexture(TextureToken token, TextureInfo info)
{
ASSERT(m_textureLRUSet.contains(token));
ASSERT(m_textures.contains(token));
m_memoryUseBytes -= memoryUseBytes(info.size, info.format);
m_textures.remove(token);
ASSERT(m_textureLRUSet.contains(token));
m_textureLRUSet.remove(token);
EvictionEntry entry;
entry.textureId = info.textureId;
entry.size = info.size;
entry.format = info.format;
#ifndef NDEBUG
entry.allocator = info.allocator;
#endif
m_evictedTextures.append(entry);
}
bool TextureManager::requestTexture(TextureToken token, IntSize size, unsigned format, unsigned& textureId)
{
textureId = 0;
if (size.width() > m_maxTextureSize || size.height() > m_maxTextureSize)
return false;
TextureMap::iterator it = m_textures.find(token);
if (it != m_textures.end()) {
ASSERT(it->second.size != size || it->second.format != format);
removeTexture(token, it->second);
}
size_t memoryRequiredBytes = memoryUseBytes(size, format);
if (memoryRequiredBytes > m_maxMemoryLimitBytes)
return false;
reduceMemoryToLimit(m_maxMemoryLimitBytes - memoryRequiredBytes);
if (m_memoryUseBytes + memoryRequiredBytes > m_maxMemoryLimitBytes)
return false;
TextureInfo info;
info.size = size;
info.format = format;
info.textureId = 0;
info.isProtected = true;
#ifndef NDEBUG
info.allocator = 0;
#endif
// Avoid churning by reusing the texture if it is about to be reclaimed and
// it has the same size and format as the requesting texture.
if (m_memoryUseBytes + memoryRequiredBytes > m_preferredMemoryLimitBytes) {
textureId = replaceTexture(token, info);
if (textureId)
return true;
}
addTexture(token, info);
return true;
}
