Add support for multithreading in softgpu.

GPU/Software/SoftGpu.cpp

@@ -212,6 +212,11 @@ void CopyToCurrentFboFromRam(u8* data, int srcwidth, int srcheight, int dstwidth
 }
 
 void SoftGPU::CopyDisplayToOutput()
+{
+	ScheduleEvent(GPU_EVENT_COPY_DISPLAY_TO_OUTPUT);
+}
+
+void SoftGPU::CopyDisplayToOutputInternal()
 {
 	// TODO: How to get the correct dimensions?
 	CopyToCurrentFboFromRam(fb, gstate.fbwidth & 0x3C0, FB_HEIGHT, PSP_CoreParameter().renderWidth, PSP_CoreParameter().renderHeight);
@@ -227,6 +232,17 @@ u32 SoftGPU::DrawSync(int mode)
 	return GPUCommon::DrawSync(mode);
 }
 
+void SoftGPU::ProcessEvent(GPUEvent ev) {
+	switch (ev.type) {
+	case GPU_EVENT_COPY_DISPLAY_TO_OUTPUT:
+		CopyDisplayToOutputInternal();
+		break;
+
+	default:
+		GPUCommon::ProcessEvent(ev);
+	}
+}
+
 void SoftGPU::FastRunLoop(DisplayList &list) {
 	for (; downcount > 0; --downcount) {
 		u32 op = Memory::ReadUnchecked_U32(list.pc);

GPU/Software/SoftGpu.h

@@ -49,4 +49,8 @@ public:
 
 protected:
 	virtual void FastRunLoop(DisplayList &list);
+	virtual void ProcessEvent(GPUEvent ev);
+
+private:
+	void CopyDisplayToOutputInternal();
 };