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NazaraImgui
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rework drawcalls building

This commit is contained in:
SweetId 2022-08-09 21:41:14 +01:00
parent afc12c44f8
commit 94e5b8c03b
1 changed files with 53 additions and 31 deletions
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84
src/NazaraImgui/NazaraImgui.cpp
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@ -568,40 +568,66 @@ namespace Nz
auto renderDevice = Nz::Graphics::Instance()->GetRenderDevice();
struct DrawCall
{
size_t vertex_offset, indice_offset;
std::vector<ImDrawCmd> cmdBuffer;
};
std::vector<DrawCall> drawCalls;
// first pass over cmd lists to prepare buffers
std::vector<Nz::VertexStruct_XYZ_Color_UV> vertices;
std::vector<uint16_t> indices;
for (int n = 0; n < drawData->CmdListsCount; ++n) {
const ImDrawList* cmd_list = drawData->CmdLists[n];
const ImDrawIdx* idx_buffer = &cmd_list->IdxBuffer.front();
std::vector<Nz::VertexStruct_XYZ_Color_UV> vertices;
vertices.reserve(cmd_list->VtxBuffer.size());
DrawCall drawCall;
drawCall.vertex_offset = vertices.size();
drawCall.indice_offset = indices.size();
vertices.reserve(vertices.size() + cmd_list->VtxBuffer.size());
for (auto& vertex : cmd_list->VtxBuffer)
vertices.push_back({ ToNzVec3(vertex.pos), ToNzColor(vertex.col), ToNzVec2(vertex.uv) });
size_t size = vertices.size() * sizeof(Nz::VertexStruct_XYZ_Color_UV);
auto vertexBuffer = renderDevice->InstantiateBuffer(Nz::BufferType::Vertex, size, Nz::BufferUsage::DeviceLocal | Nz::BufferUsage::Dynamic, vertices.data());
auto indexBuffer = renderDevice->InstantiateBuffer(Nz::BufferType::Index, cmd_list->IdxBuffer.size() * sizeof(ImWchar), Nz::BufferUsage::DeviceLocal | Nz::BufferUsage::Dynamic, idx_buffer);
indices.reserve(indices.size() + cmd_list->IdxBuffer.size());
for (auto indice : cmd_list->IdxBuffer)
indices.push_back(drawCall.vertex_offset + indice);
auto* windowRT = window.GetRenderTarget();
std::vector<ImDrawCmd> cmdBuffer;
cmdBuffer.reserve(cmd_list->CmdBuffer.size());
for (auto& cmd : cmd_list->CmdBuffer)
cmdBuffer.push_back(cmd);
drawCall.cmdBuffer.push_back(cmd);
frame.Execute([this, windowRT, &frame, fb_width, fb_height, cmdBuffer, vertexBuffer, indexBuffer](Nz::CommandBufferBuilder& builder) {
builder.BeginDebugRegion("ImGui", Nz::Color::Green);
drawCalls.push_back(std::move(drawCall));
}
// now that we have macro buffers, allocate them on gpu
size_t size = vertices.size() * sizeof(Nz::VertexStruct_XYZ_Color_UV);
auto vertexBuffer = renderDevice->InstantiateBuffer(Nz::BufferType::Vertex, size, Nz::BufferUsage::DeviceLocal | Nz::BufferUsage::Dynamic, vertices.data());
size = indices.size() * sizeof(uint16_t);
auto indexBuffer = renderDevice->InstantiateBuffer(Nz::BufferType::Index, size, Nz::BufferUsage::DeviceLocal | Nz::BufferUsage::Dynamic, indices.data());
// freeing memory now, no need to keep buffers on CPU
vertices.clear();
indices.clear();
auto* windowRT = window.GetRenderTarget();
frame.Execute([this, windowRT, &frame, fb_width, fb_height, drawCalls, vertexBuffer, indexBuffer](Nz::CommandBufferBuilder& builder) {
builder.BeginDebugRegion("ImGui", Nz::Color::Green);
{
Nz::Recti renderRect(0, 0, fb_width, fb_height);
builder.BeginRenderPass(windowRT->GetFramebuffer(frame.GetFramebufferIndex()), windowRT->GetRenderPass(), renderRect);
{
Nz::Recti renderRect(0, 0, fb_width, fb_height);
builder.SetViewport(Nz::Recti{ 0, 0, fb_width, fb_height });
builder.BindIndexBuffer(*indexBuffer, Nz::IndexType::U16);
builder.BindVertexBuffer(0, *vertexBuffer);
Nz::CommandBufferBuilder::ClearValues clearValues[2];
clearValues[0].color = Nz::Color::Black;
clearValues[1].depth = 1.f;
clearValues[1].stencil = 0;
builder.BeginRenderPass(windowRT->GetFramebuffer(frame.GetFramebufferIndex()), windowRT->GetRenderPass(), renderRect, { clearValues[0], clearValues[1] });
for (auto& drawCall : drawCalls)
{
Nz::UInt64 indexOffset = 0;
for (auto& cmd : cmdBuffer)
Nz::UInt64 indexOffset = drawCall.indice_offset;
for (auto& cmd : drawCall.cmdBuffer)
{
if (!cmd.UserCallback)
{
@ -635,22 +661,18 @@ namespace Nz
builder.BindShaderBinding(0, *m_untexturedPipeline.uboShaderBinding);
}
builder.SetViewport(Nz::Recti{ 0, 0, fb_width, fb_height });
builder.SetScissor(Nz::Recti{ int(rect.x), int(rect.y), int(rect.z - rect.x), int(rect.w - rect.y) });// Nz::Recti{ int(rect.x), int(fb_height - rect.w), int(rect.z - rect.x), int(rect.w - rect.y) });
builder.BindIndexBuffer(*indexBuffer, Nz::IndexType::U16, indexOffset * sizeof(ImWchar));
builder.BindVertexBuffer(0, *vertexBuffer);
builder.DrawIndexed(count);
builder.DrawIndexed(count, 1, indexOffset);
}
indexOffset += cmd.ElemCount;
}
}
builder.EndRenderPass();
}
builder.EndDebugRegion();
}, Nz::QueueType::Graphics);
}
builder.EndRenderPass();
}
builder.EndDebugRegion();
}, Nz::QueueType::Graphics);
}
}