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[Feat] (MG_State/Program, DirectGLES): plumb ubo to backend

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This commit is contained in:
swung0x48
2025-11-05 15:37:10 +08:00
parent c39c03d866
commit ef1924d7f9
7 changed files with 82 additions and 14 deletions
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MobileGL/MG_Backend/DirectGLES/DirectGLES.cpp
+50 -11
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@@ -15,6 +15,7 @@ namespace MobileGL::MG_Backend::DirectGLES {
void SyncNeccessaryBuffers() {
// All buffers we need are:
// 1.VBOs 2.IBO 3.UBOs (TODO) 4.SSBOs (TODO)
Vector<SharedPtr<MG_State::GLState::BufferObject>> buffersToSync;
const auto& currentVAOObject = MG_State::pGLContext->GetBoundVertexArray();
if (!currentVAOObject) {
@@ -22,6 +23,7 @@ namespace MobileGL::MG_Backend::DirectGLES {
return;
}
// VBO
for (const auto& attrib : currentVAOObject->GetAllAttributes()) {
if (!attrib.Enabled) continue;
const auto& bufferObject = attrib.Buffer;
@@ -29,11 +31,24 @@ namespace MobileGL::MG_Backend::DirectGLES {
buffersToSync.push_back(bufferObject);
}
}
// IBO
const auto& possibleIBO = currentVAOObject->GetIndexBufferBindingSlot().GetBoundObject();
if (possibleIBO) {
buffersToSync.push_back(possibleIBO);
}
// UBO
auto uboBindingPointCnt = MG_State::pGLContext->GetBufferBindingPointCount(BufferTarget::Uniform);
for (SizeT i = 0; i < uboBindingPointCnt; ++i) {
auto& point = MG_State::pGLContext->GetBufferBindingPoint(BufferTarget::Uniform, i);
auto obj = point.GetBoundObject();
if (obj)
buffersToSync.push_back(obj);
}
// PBO
const auto& pbo = MG_State::pGLContext->GetBufferBindingSlot(BufferTarget::PixelUnpack).GetBoundObject();
if (pbo) {
buffersToSync.push_back(pbo);
@@ -300,20 +315,44 @@ namespace MobileGL::MG_Backend::DirectGLES {
const auto& backendProgramIt = PrgramImpl::g_backendProgramObjects.find(currentProgram);
if (backendProgramIt != PrgramImpl::g_backendProgramObjects.end()) {
backendProgramIt->second->Use();
// UBO
MG_External::GLES::glBindBuffer(GL_UNIFORM_BUFFER, backendProgramIt->second->GetBackendGlobalUBOId());
MG_External::GLES::glBufferSubData(GL_UNIFORM_BUFFER, 0, currentProgram->GetUBOSize(),
currentProgram->MapUBO());
MG_External::GLES::glBindBuffer(GL_UNIFORM_BUFFER, 0);
auto backendProgramId = backendProgramIt->second->GetBackendProgramId();
// Global UBO
if (currentProgram->GetUBOSize() > 0) {
MG_External::GLES::glBindBuffer(GL_UNIFORM_BUFFER, backendProgramIt->second->GetBackendGlobalUBOId());
MG_External::GLES::glBufferSubData(GL_UNIFORM_BUFFER, 0, currentProgram->GetUBOSize(),
currentProgram->MapUBO());
MG_External::GLES::glBindBuffer(GL_UNIFORM_BUFFER, 0);
Uint blockIndex = MG_External::GLES::glGetUniformBlockIndex(
backendProgramIt->second->GetBackendProgramId(), MG_Util::ShaderTranspiler::GLOBAL_UBO_NAME);
Uint blockIndex = MG_External::GLES::glGetUniformBlockIndex(
backendProgramId, MG_Util::ShaderTranspiler::GLOBAL_UBO_NAME);
MG_External::GLES::glUniformBlockBinding(backendProgramIt->second->GetBackendProgramId(), blockIndex,
0);
MG_External::GLES::glUniformBlockBinding(backendProgramId, blockIndex, 0);
MG_External::GLES::glBindBufferBase(GL_UNIFORM_BUFFER, 0,
backendProgramIt->second->GetBackendGlobalUBOId());
MG_External::GLES::glBindBufferBase(GL_UNIFORM_BUFFER, 0,
backendProgramIt->second->GetBackendGlobalUBOId());
}
// Normal UBO
auto uboCount = currentProgram->GetActiveUniformBlocksCount();
for (Int i = 0; i < uboCount; ++i) {
// state binding point == backend binding point
// Connect program ubo index to backend binding point
auto binding = currentProgram->GetUniformBlockBinding(i);
auto& name = currentProgram->GetUniformBlockName(i);
GLuint backendBlkIdx = MG_External::GLES::glGetUniformBlockIndex(backendProgramId, name.c_str());
MG_External::GLES::glUniformBlockBinding(backendProgramId, backendBlkIdx, binding);
// Connect buffer to backend binding point
auto& point = MG_State::pGLContext->GetBufferBindingPoint(BufferTarget::Uniform, binding);
auto bufferObj = point.GetBoundObject();
auto range = point.GetRange();
if (range.end > bufferObj->GetSize()) {
MG_External::GLES::glBindBufferBase(GL_UNIFORM_BUFFER, binding, BufferImpl::g_backendBufferObjects[bufferObj]->GetBackendBufferId());
} else {
MG_External::GLES::glBindBufferRange(GL_UNIFORM_BUFFER, binding, BufferImpl::g_backendBufferObjects[bufferObj]->GetBackendBufferId(),
range.start, range.end - range.start);
}
}
// Sampler unit binding
auto maxUniformLoc = currentProgram->GetMaxUniformLocation();