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Gui Only Render #949

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Merged
briaguya0 merged 4 commits into from
Nov 2, 2025
Merged

Gui Only Render #949

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8491191
Add `RunGuiOnly` to `interpreter` to run ImGui interface without game…
Malkierian Oct 12, 2025
9d0ad10
Merge branch 'main' of https://github.com/kenix3/libultraship into gu…
Malkierian Oct 26, 2025
123c57b
clang
Malkierian Oct 27, 2025
9c6bc2a
Add `RunGuiOnly` to `Window.h` and override with `Fast3dWindow`.
Malkierian Nov 2, 2025
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1 change: 1 addition & 0 deletions include/fast/Fast3dWindow.h
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,7 @@ class Fast3dWindow : public Ship::Window {

void Init() override;
void Close() override;
void RunGuiOnly();
void StartFrame() override;
void EndFrame() override;
bool IsFrameReady() override;
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1 change: 1 addition & 0 deletions include/fast/interpreter.h
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Expand Up @@ -363,6 +363,7 @@ class Interpreter {
void GetDimensions(uint32_t* width, uint32_t* height, int32_t* posX, int32_t* posY);
GfxRenderingAPI* GetCurrentRenderingAPI();
void StartFrame();
void RunGuiOnly();
void Run(Gfx* commands, const std::unordered_map<Mtx*, MtxF>& mtx_replacements);
void EndFrame();
void HandleWindowEvents();
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4 changes: 4 additions & 0 deletions src/fast/Fast3dWindow.cpp
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Expand Up @@ -166,6 +166,10 @@ void Fast3dWindow::Close() {
mWindowManagerApi->Close();
}

void Fast3dWindow::RunGuiOnly() {
mInterpreter->RunGuiOnly();
}

void Fast3dWindow::StartFrame() {
mInterpreter->StartFrame();
}
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40 changes: 40 additions & 0 deletions src/fast/interpreter.cpp
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Expand Up @@ -4301,6 +4301,46 @@ void Interpreter::StartFrame() {

GfxExecStack g_exec_stack = {};

void Interpreter::RunGuiOnly() {
SpReset();

mGetPixelDepthPending.clear();
mGetPixelDepthCached.clear();

mRapi->UpdateFramebufferParameters(0, mGfxCurrentWindowDimensions.width, mGfxCurrentWindowDimensions.height, 1,
false, true, true, !mRendersToFb);
mRapi->StartFrame();
mRapi->StartDrawToFramebuffer(mRendersToFb ? mGameFb : 0, (float)mCurDimensions.height / mNativeDimensions.height);
mRapi->ClearFramebuffer(false, true);
mRdp->viewport_or_scissor_changed = true;
mRenderingState.viewport = {};
mRenderingState.scissor = {};

Flush();
mGfxFrameBuffer = 0;

if (mRendersToFb) {
mRapi->StartDrawToFramebuffer(0, 1);
mRapi->ClearFramebuffer(true, true);
if (mMsaaLevel > 1) {
if (!ViewportMatchesRendererResolution()) {
mRapi->ResolveMSAAColorBuffer(mGameFbMsaaResolved, mGameFb);
mGfxFrameBuffer = (uintptr_t)mRapi->GetFramebufferTextureId(mGameFbMsaaResolved);
} else {
mRapi->ResolveMSAAColorBuffer(0, mGameFb);
}
} else {
mGfxFrameBuffer = (uintptr_t)mRapi->GetFramebufferTextureId(mGameFb);
}
} else if (mFbActive) {
// Failsafe reset to main framebuffer to prevent softlocking the renderer
mFbActive = 0;
mRapi->StartDrawToFramebuffer(0, 1);

assert(0 && "active framebuffer was never reset back to original");
}
}

void Interpreter::Run(Gfx* commands, const std::unordered_map<Mtx*, MtxF>& mtx_replacements) {
SpReset();

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