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;
}
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;
}
void TextureManager::evictAndDeleteAllTextures(TextureAllocator* allocator)
{
unprotectAllTextures();
reduceMemoryToLimit(0);
deleteEvictedTextures(allocator);
}
void TextureManager::setMaxMemoryLimitBytes(size_t memoryLimitBytes)
{
reduceMemoryToLimit(memoryLimitBytes);
ASSERT(currentMemoryUseBytes() <= memoryLimitBytes);
m_maxMemoryLimitBytes = memoryLimitBytes;
}