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#include "GLShaderUniformBlocks.h"
#include "GLShaderProgram.h"
#include "../RenderResources.h"
#include "../../ServiceLocator.h"
#include "../../../Main.h"
#include <cstring> // for memcpy()
namespace nCine
{
GLShaderUniformBlocks::GLShaderUniformBlocks()
: shaderProgram_(nullptr), dataPointer_(nullptr)
{
}
GLShaderUniformBlocks::GLShaderUniformBlocks(GLShaderProgram* shaderProgram)
: GLShaderUniformBlocks(shaderProgram, nullptr, nullptr)
{
}
GLShaderUniformBlocks::GLShaderUniformBlocks(GLShaderProgram* shaderProgram, const char* includeOnly, const char* exclude)
: GLShaderUniformBlocks()
{
SetProgram(shaderProgram, includeOnly, exclude);
}
void GLShaderUniformBlocks::Bind()
{
#if defined(DEATH_DEBUG)
static const std::int32_t offsetAlignment = theServiceLocator().GetGfxCapabilities().GetValue(IGfxCapabilities::GLIntValues::UNIFORM_BUFFER_OFFSET_ALIGNMENT);
#endif
if (uboParams_.object) {
uboParams_.object->Bind();
GLintptr moreOffset = 0;
for (GLUniformBlockCache& uniformBlockCache : uniformBlockCaches_) {
uniformBlockCache.SetBlockBinding(uniformBlockCache.GetIndex());
const GLintptr offset = static_cast<GLintptr>(uboParams_.offset) + moreOffset;
#if defined(DEATH_DEBUG)
DEATH_DEBUG_ASSERT(offset % offsetAlignment == 0);
#endif
uboParams_.object->BindBufferRange(uniformBlockCache.GetBindingIndex(), offset, uniformBlockCache.usedSize());
moreOffset += uniformBlockCache.usedSize();
}
}
}
void GLShaderUniformBlocks::SetProgram(GLShaderProgram* shaderProgram, const char* includeOnly, const char* exclude)
{
DEATH_ASSERT(shaderProgram);
shaderProgram_ = shaderProgram;
shaderProgram_->ProcessDeferredQueries();
uniformBlockCaches_.clear();
if (shaderProgram->GetStatus() == GLShaderProgram::Status::LinkedWithIntrospection) {
ImportUniformBlocks(includeOnly, exclude);
}
}
void GLShaderUniformBlocks::SetUniformsDataPointer(GLubyte* dataPointer)
{
DEATH_ASSERT(dataPointer);
if (shaderProgram_->GetStatus() != GLShaderProgram::Status::LinkedWithIntrospection) {
return;
}
dataPointer_ = dataPointer;
std::int32_t offset = 0;
for (GLUniformBlockCache& uniformBlockCache : uniformBlockCaches_) {
uniformBlockCache.SetDataPointer(dataPointer + offset);
offset += uniformBlockCache.uniformBlock()->GetSize() - uniformBlockCache.uniformBlock()->GetAlignAmount();
}
}
GLUniformBlockCache* GLShaderUniformBlocks::GetUniformBlock(const char* name)
{
DEATH_ASSERT(name);
GLUniformBlockCache* uniformBlockCache = nullptr;
if (shaderProgram_ != nullptr) {
uniformBlockCache = uniformBlockCaches_.find(String::nullTerminatedView(name));
} else {
LOGE("Cannot find uniform block \"{}\", no shader program associated", name);
}
return uniformBlockCache;
}
void GLShaderUniformBlocks::CommitUniformBlocks()
{
if (shaderProgram_ != nullptr) {
if (shaderProgram_->GetStatus() == GLShaderProgram::Status::LinkedWithIntrospection) {
std::int32_t totalUsedSize = 0;
bool hasMemoryGaps = false;
for (GLUniformBlockCache& uniformBlockCache : uniformBlockCaches_) {
// There is a gap if at least one block cache (not in last position) uses less memory than its size
if (uniformBlockCache.GetDataPointer() != dataPointer_ + totalUsedSize) {
hasMemoryGaps = true;
}
totalUsedSize += uniformBlockCache.usedSize();
}
if (totalUsedSize > 0) {
const RenderBuffersManager::BufferTypes bufferType = RenderBuffersManager::BufferTypes::Uniform;
uboParams_ = RenderResources::GetBuffersManager().AcquireMemory(bufferType, totalUsedSize);
if (uboParams_.mapBase != nullptr) {
if (hasMemoryGaps) {
std::int32_t offset = 0;
for (GLUniformBlockCache& uniformBlockCache : uniformBlockCaches_) {
std::memcpy(uboParams_.mapBase + uboParams_.offset + offset, uniformBlockCache.GetDataPointer(), uniformBlockCache.usedSize());
offset += uniformBlockCache.usedSize();
}
} else {
std::memcpy(uboParams_.mapBase + uboParams_.offset, dataPointer_, totalUsedSize);
}
}
}
}
} else {
LOGE("No shader program associated");
}
}
void GLShaderUniformBlocks::ImportUniformBlocks(const char* includeOnly, const char* exclude)
{
const std::uint32_t MaxUniformBlockName = 128;
std::uint32_t importedCount = 0;
for (GLUniformBlock& uniformBlock : shaderProgram_->uniformBlocks_) {
const char* uniformBlockName = uniformBlock.GetName();
const char* currentIncludeOnly = includeOnly;
const char* currentExclude = exclude;
bool shouldImport = true;
if (includeOnly != nullptr) {
shouldImport = false;
while (currentIncludeOnly != nullptr && currentIncludeOnly[0] != '\0') {
if (strncmp(currentIncludeOnly, uniformBlockName, MaxUniformBlockName) == 0) {
shouldImport = true;
break;
}
currentIncludeOnly += strnlen(currentIncludeOnly, MaxUniformBlockName) + 1;
}
}
if (exclude != nullptr) {
while (currentExclude != nullptr && currentExclude[0] != '\0') {
if (strncmp(currentExclude, uniformBlockName, MaxUniformBlockName) == 0) {
shouldImport = false;
break;
}
currentExclude += strnlen(currentExclude, MaxUniformBlockName) + 1;
}
}
if (shouldImport) {
uniformBlockCaches_.emplace(uniformBlockName, &uniformBlock);
importedCount++;
}
}
if (importedCount > UniformBlockCachesHashSize) {
LOGW("More imported uniform blocks ({}) than hashmap buckets ({})", importedCount, UniformBlockCachesHashSize);
}
}
}
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