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metaforce/imgui/ImGuiEngine.cpp

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#include "ImGuiEngine.hpp"
#include "athena/Compression.hpp"
#include "hecl/Pipeline.hpp"
#include "hecl/VertexBufferPool.hpp"
#include <zeus/CMatrix4f.hpp>
extern "C" const uint8_t NOTO_MONO_FONT[];
extern "C" const size_t NOTO_MONO_FONT_SZ;
extern "C" const size_t NOTO_MONO_FONT_DECOMPRESSED_SZ;
namespace metaforce {
static logvisor::Module Log{"ImGuiEngine"};
struct ImGuiEngine::Input ImGuiEngine::Input;
static boo::IGraphicsDataFactory* m_factory;
static boo::IWindow* m_window;
static boo::ObjToken<boo::IShaderPipeline> ShaderPipeline;
static boo::ObjToken<boo::IGraphicsBufferD> VertexBuffer;
static boo::ObjToken<boo::IGraphicsBufferD> IndexBuffer;
static boo::ObjToken<boo::IGraphicsBufferD> UniformBuffer;
static boo::ObjToken<boo::IShaderDataBinding> ShaderDataBinding;
static boo::ObjToken<boo::ITextureS> ImGuiAtlas;
static boo::SWindowRect WindowRect;
struct Uniform {
zeus::CMatrix4f xf;
};
static size_t VertexBufferSize = 5000;
static size_t IndexBufferSize = 5000;
const char* getClipboardText(void* userData) {
static ImVector<char> ClipboardBuf;
size_t sz = 0;
const auto data = static_cast<boo::IWindow*>(userData)->clipboardPaste(boo::EClipboardType::String, sz);
ClipboardBuf.resize(sz);
strncpy(ClipboardBuf.Data, reinterpret_cast<const char*>(data.get()), sz);
return ClipboardBuf.Data;
}
void setClipboardText(void* userData, const char* text) {
const auto* data = reinterpret_cast<const uint8_t*>(text);
static_cast<boo::IWindow*>(userData)->clipboardCopy(boo::EClipboardType::String, data, strlen(text));
}
void ImGuiEngine::Initialize(boo::IGraphicsDataFactory* factory, boo::IWindow* window, float scale) {
m_factory = factory;
m_window = window;
WindowRect = window->getWindowFrame();
ImGui::CreateContext();
ImGuiIO& io = ImGui::GetIO();
io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset;
io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors;
io.GetClipboardTextFn = getClipboardText;
io.SetClipboardTextFn = setClipboardText;
io.ClipboardUserData = window;
io.KeyMap[ImGuiKey_Tab] = 256 + static_cast<int>(boo::ESpecialKey::Tab);
io.KeyMap[ImGuiKey_LeftArrow] = 256 + static_cast<int>(boo::ESpecialKey::Left);
io.KeyMap[ImGuiKey_RightArrow] = 256 + static_cast<int>(boo::ESpecialKey::Right);
io.KeyMap[ImGuiKey_UpArrow] = 256 + static_cast<int>(boo::ESpecialKey::Up);
io.KeyMap[ImGuiKey_DownArrow] = 256 + static_cast<int>(boo::ESpecialKey::Down);
io.KeyMap[ImGuiKey_PageUp] = 256 + static_cast<int>(boo::ESpecialKey::PgUp);
io.KeyMap[ImGuiKey_PageDown] = 256 + static_cast<int>(boo::ESpecialKey::PgDown);
io.KeyMap[ImGuiKey_Home] = 256 + static_cast<int>(boo::ESpecialKey::Home);
io.KeyMap[ImGuiKey_End] = 256 + static_cast<int>(boo::ESpecialKey::End);
io.KeyMap[ImGuiKey_Insert] = 256 + static_cast<int>(boo::ESpecialKey::Insert);
io.KeyMap[ImGuiKey_Delete] = 256 + static_cast<int>(boo::ESpecialKey::Delete);
io.KeyMap[ImGuiKey_Backspace] = 256 + static_cast<int>(boo::ESpecialKey::Backspace);
io.KeyMap[ImGuiKey_Space] = ' ';
io.KeyMap[ImGuiKey_Enter] = 256 + static_cast<int>(boo::ESpecialKey::Enter);
io.KeyMap[ImGuiKey_Escape] = 256 + static_cast<int>(boo::ESpecialKey::Esc);
io.KeyMap[ImGuiKey_A] = 'a'; // for text edit CTRL+A: select all
io.KeyMap[ImGuiKey_C] = 'c'; // for text edit CTRL+C: copy
io.KeyMap[ImGuiKey_V] = 'v'; // for text edit CTRL+V: paste
io.KeyMap[ImGuiKey_X] = 'x'; // for text edit CTRL+X: cut
io.KeyMap[ImGuiKey_Y] = 'y'; // for text edit CTRL+Y: redo
io.KeyMap[ImGuiKey_Z] = 'z'; // for text edit CTRL+Z: undo
auto* fontData = new uint8_t[NOTO_MONO_FONT_DECOMPRESSED_SZ];
athena::io::Compression::decompressZlib(NOTO_MONO_FONT, NOTO_MONO_FONT_SZ, fontData,
NOTO_MONO_FONT_DECOMPRESSED_SZ);
int width = 0;
int height = 0;
unsigned char* pixels = nullptr;
ImFontConfig fontConfig{};
fontConfig.FontData = fontData;
fontConfig.FontDataSize = NOTO_MONO_FONT_DECOMPRESSED_SZ;
fontConfig.SizePixels = std::floor(14.f * scale);
fontConfig.OversampleH = 2;
snprintf(fontConfig.Name, sizeof(fontConfig.Name), "Noto Mono Regular, %dpx",
static_cast<int>(fontConfig.SizePixels));
io.Fonts->AddFont(&fontConfig);
io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);
factory->commitTransaction([&](boo::IGraphicsDataFactory::Context& ctx) {
ShaderPipeline = hecl::conv->convert(Shader_ImGuiShader{});
ImGuiAtlas = ctx.newStaticTexture(width, height, 1, boo::TextureFormat::RGBA8, boo::TextureClampMode::ClampToEdge,
pixels, width * height * 4);
VertexBuffer = ctx.newDynamicBuffer(boo::BufferUse::Vertex, sizeof(ImDrawVert), VertexBufferSize);
IndexBuffer = ctx.newDynamicBuffer(boo::BufferUse::Index, sizeof(ImDrawIdx), IndexBufferSize);
UniformBuffer = ctx.newDynamicBuffer(boo::BufferUse::Uniform, sizeof(Uniform), 1);
BuildShaderDataBinding(ctx);
return true;
} BooTrace);
io.Fonts->SetTexID(ImGuiAtlas.get());
ImGui::GetStyle().ScaleAllSizes(scale);
}
void ImGuiEngine::Shutdown() {
ImGui::DestroyContext();
ShaderDataBinding.reset();
ShaderPipeline.reset();
}
void ImGuiEngine::Begin(float dt, float scale) {
ImGuiIO& io = ImGui::GetIO();
io.DeltaTime = dt;
io.DisplaySize.x = static_cast<float>(WindowRect.size[0]);
io.DisplaySize.y = static_cast<float>(WindowRect.size[1]);
io.DisplayFramebufferScale = ImVec2{scale, scale};
if (Input.m_mouseIn) {
io.MousePos = ImVec2{static_cast<float>(Input.m_mousePos.pixel[0]),
static_cast<float>(WindowRect.size[1] - Input.m_mousePos.pixel[1])};
} else {
io.MousePos = ImVec2{-FLT_MAX, -FLT_MAX};
}
memcpy(io.MouseDown, Input.m_mouseButtons.data(), sizeof(io.MouseDown));
float scrollDelta = Input.m_scrollDelta.delta[1] / scale;
float scrollDeltaH = Input.m_scrollDelta.delta[0] / scale;
if (Input.m_scrollDelta.isAccelerated) {
scrollDelta /= 10.f;
scrollDeltaH /= 10.f;
}
io.MouseWheel = static_cast<float>(scrollDelta);
io.MouseWheelH = static_cast<float>(scrollDeltaH);
Input.m_scrollDelta.zeroOut();
io.KeyCtrl = True(Input.m_modifiers & boo::EModifierKey::Ctrl);
io.KeyShift = True(Input.m_modifiers & boo::EModifierKey::Shift);
io.KeyAlt = True(Input.m_modifiers & boo::EModifierKey::Alt);
io.KeySuper = True(Input.m_modifiers & boo::EModifierKey::Command);
memcpy(io.KeysDown, Input.m_keys.data(), sizeof(io.KeysDown));
for (const auto c : ImGuiEngine::Input.m_charCodes) {
io.AddInputCharacter(c);
}
ImGuiEngine::Input.m_charCodes.clear();
ImGuiWindowCallback::m_mouseCaptured = io.WantCaptureMouse;
ImGuiWindowCallback::m_keyboardCaptured = io.WantCaptureKeyboard;
switch (ImGui::GetMouseCursor()) {
default:
m_window->setCursor(boo::EMouseCursor::Pointer);
break;
case ImGuiMouseCursor_TextInput:
m_window->setCursor(boo::EMouseCursor::IBeam);
break;
case ImGuiMouseCursor_ResizeNS:
m_window->setCursor(boo::EMouseCursor::VerticalArrow);
break;
case ImGuiMouseCursor_ResizeEW:
m_window->setCursor(boo::EMouseCursor::HorizontalArrow);
break;
case ImGuiMouseCursor_ResizeNESW:
m_window->setCursor(boo::EMouseCursor::BottomLeftArrow);
break;
case ImGuiMouseCursor_ResizeNWSE:
m_window->setCursor(boo::EMouseCursor::BottomRightArrow);
break;
case ImGuiMouseCursor_Hand:
m_window->setCursor(boo::EMouseCursor::Hand);
break;
case ImGuiMouseCursor_NotAllowed:
m_window->setCursor(boo::EMouseCursor::NotAllowed);
break;
}
ImGui::NewFrame();
ImGui::ShowDemoWindow();
}
void ImGuiEngine::End() {
ImGui::EndFrame();
ImGui::Render();
ImDrawData* drawData = ImGui::GetDrawData();
float L = drawData->DisplayPos.x;
float R = drawData->DisplayPos.x + drawData->DisplaySize.x;
float T = drawData->DisplayPos.y;
float B = drawData->DisplayPos.y + drawData->DisplaySize.y;
float N = 0.f;
float F = 1.f;
zeus::CMatrix4f projXf = zeus::CMatrix4f{
zeus::CVector4f{2.0f / (R - L), 0.0f, 0.0f, 0.0f},
zeus::CVector4f{0.0f, 2.0f / (T - B), 0.0f, 0.0f},
zeus::CVector4f{0.0f, 0.0f, 1 / (F - N), 0.0f},
zeus::CVector4f{(R + L) / (L - R), (T + B) / (B - T), N / (F - N), 1.0f},
};
m_factory->commitTransaction([&](boo::IGraphicsDataFactory::Context& ctx) {
bool rebind = false;
if (drawData->TotalIdxCount > IndexBufferSize) {
Log.report(logvisor::Info, FMT_STRING(_SYS_STR("Resizing index buffer from {} to {}")), IndexBufferSize,
drawData->TotalIdxCount);
IndexBuffer = ctx.newDynamicBuffer(boo::BufferUse::Index, sizeof(ImDrawIdx), drawData->TotalIdxCount);
IndexBufferSize = drawData->TotalIdxCount;
rebind = true;
}
if (drawData->TotalVtxCount > VertexBufferSize) {
Log.report(logvisor::Info, FMT_STRING(_SYS_STR("Resizing vertex buffer from {} to {}")), VertexBufferSize,
drawData->TotalVtxCount);
VertexBuffer = ctx.newDynamicBuffer(boo::BufferUse::Vertex, sizeof(ImDrawVert), drawData->TotalVtxCount);
VertexBufferSize = drawData->TotalVtxCount;
rebind = true;
}
if (rebind) {
BuildShaderDataBinding(ctx);
}
UniformBuffer->load(&projXf, sizeof(Uniform));
auto* vtxBuf = static_cast<ImDrawVert*>(VertexBuffer->map(drawData->TotalVtxCount * sizeof(ImDrawVert)));
auto* idxBuf = static_cast<ImDrawIdx*>(IndexBuffer->map(drawData->TotalIdxCount * sizeof(ImDrawIdx)));
for (int i = 0; i < drawData->CmdListsCount; ++i) {
const auto* cmdList = drawData->CmdLists[i];
int vtxBufferSz = cmdList->VtxBuffer.size();
int idxBufferSz = cmdList->IdxBuffer.size();
memcpy(vtxBuf, cmdList->VtxBuffer.begin(), vtxBufferSz * sizeof(ImDrawVert));
memcpy(idxBuf, cmdList->IdxBuffer.begin(), idxBufferSz * sizeof(ImDrawIdx));
vtxBuf += vtxBufferSz;
idxBuf += idxBufferSz;
}
VertexBuffer->unmap();
IndexBuffer->unmap();
return true;
} BooTrace);
}
void ImGuiEngine::Draw(boo::IGraphicsCommandQueue* gfxQ) {
ImDrawData* drawData = ImGui::GetDrawData();
gfxQ->setShaderDataBinding(ShaderDataBinding);
boo::SWindowRect viewportRect = WindowRect;
int viewportHeight = viewportRect.size[1];
viewportRect.location = {0, 0};
if (m_factory->platform() == boo::IGraphicsDataFactory::Platform::Vulkan) {
viewportRect.location[1] = viewportHeight;
viewportRect.size[1] = -viewportHeight;
}
gfxQ->setViewport(viewportRect);
size_t idxOffset = 0;
size_t vtxOffset = 0;
for (int i = 0; i < drawData->CmdListsCount; ++i) {
const auto* cmdList = drawData->CmdLists[i];
for (const auto& drawCmd : cmdList->CmdBuffer) {
if (drawCmd.UserCallback != nullptr) {
drawCmd.UserCallback(cmdList, &drawCmd);
continue;
}
ImVec2 pos = drawData->DisplayPos;
int clipX = static_cast<int>(drawCmd.ClipRect.x - pos.x);
int clipY = static_cast<int>(drawCmd.ClipRect.y - pos.y);
int clipW = static_cast<int>(drawCmd.ClipRect.z - pos.x) - clipX;
int clipH = static_cast<int>(drawCmd.ClipRect.w - pos.y) - clipY;
boo::SWindowRect clipRect{clipX, clipY, clipW, clipH};
if (m_factory->platform() == boo::IGraphicsDataFactory::Platform::Vulkan
|| m_factory->platform() == boo::IGraphicsDataFactory::Platform::Metal) {
clipRect.location[1] = viewportHeight - clipRect.location[1] - clipRect.size[1];
}
gfxQ->setScissor(clipRect);
gfxQ->drawIndexed(idxOffset + drawCmd.IdxOffset, drawCmd.ElemCount, vtxOffset + drawCmd.VtxOffset);
}
idxOffset += cmdList->IdxBuffer.size();
vtxOffset += cmdList->VtxBuffer.size();
}
}
void ImGuiEngine::BuildShaderDataBinding(boo::IGraphicsDataFactory::Context& ctx) {
boo::ObjToken<boo::IGraphicsBuffer> uniforms[] = {UniformBuffer.get()};
boo::PipelineStage unistages[] = {boo::PipelineStage::Vertex};
size_t unioffs[] = {0};
size_t unisizes[] = {sizeof(Uniform)};
boo::ObjToken<boo::ITexture> texs[] = {ImGuiAtlas.get()};
ShaderDataBinding = ctx.newShaderDataBinding(ShaderPipeline, VertexBuffer.get(), nullptr, IndexBuffer.get(), 1,
uniforms, unistages, unioffs, unisizes, 1, texs, nullptr, nullptr);
}
bool ImGuiWindowCallback::m_mouseCaptured = false;
bool ImGuiWindowCallback::m_keyboardCaptured = false;
void ImGuiWindowCallback::mouseDown(const boo::SWindowCoord& coord, boo::EMouseButton button, boo::EModifierKey mods) {
ImGuiEngine::Input.m_mousePos = coord;
if (button != boo::EMouseButton::None) {
ImGuiEngine::Input.m_mouseButtons[static_cast<size_t>(button) - 1] = true;
}
ImGuiEngine::Input.m_modifiers = mods;
}
void ImGuiWindowCallback::mouseUp(const boo::SWindowCoord& coord, boo::EMouseButton button, boo::EModifierKey mods) {
ImGuiEngine::Input.m_mousePos = coord;
if (button != boo::EMouseButton::None) {
ImGuiEngine::Input.m_mouseButtons[static_cast<size_t>(button) - 1] = false;
}
ImGuiEngine::Input.m_modifiers = mods;
}
void ImGuiWindowCallback::mouseMove(const boo::SWindowCoord& coord) { ImGuiEngine::Input.m_mousePos = coord; }
void ImGuiWindowCallback::mouseEnter(const boo::SWindowCoord& coord) {
ImGuiEngine::Input.m_mouseIn = true;
ImGuiEngine::Input.m_mousePos = coord;
}
void ImGuiWindowCallback::mouseLeave(const boo::SWindowCoord& coord) {
ImGuiEngine::Input.m_mouseIn = false;
ImGuiEngine::Input.m_mousePos = coord;
}
void ImGuiWindowCallback::scroll(const boo::SWindowCoord& coord, const boo::SScrollDelta& scroll) {
ImGuiEngine::Input.m_mousePos = coord;
ImGuiEngine::Input.m_scrollDelta += scroll;
}
void ImGuiWindowCallback::charKeyDown(unsigned long charCode, boo::EModifierKey mods, bool isRepeat) {
if (charCode < 256) {
ImGuiEngine::Input.m_keys[charCode] = true;
}
ImGuiEngine::Input.m_charCodes.push_back(charCode);
ImGuiEngine::Input.m_modifiers = mods;
}
void ImGuiWindowCallback::charKeyUp(unsigned long charCode, boo::EModifierKey mods) {
if (charCode < 256) {
ImGuiEngine::Input.m_keys[charCode] = false;
}
ImGuiEngine::Input.m_modifiers = mods;
}
void ImGuiWindowCallback::specialKeyDown(boo::ESpecialKey key, boo::EModifierKey mods, bool isRepeat) {
ImGuiEngine::Input.m_keys[256 + static_cast<int>(key)] = true;
ImGuiEngine::Input.m_modifiers = mods;
}
void ImGuiWindowCallback::specialKeyUp(boo::ESpecialKey key, boo::EModifierKey mods) {
ImGuiEngine::Input.m_keys[256 + static_cast<int>(key)] = false;
ImGuiEngine::Input.m_modifiers = mods;
}
void ImGuiWindowCallback::resized(const boo::SWindowRect& rect, bool sync) { WindowRect = rect; }
} // namespace metaforce
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