GPU: Add some missing state reset

src/core/gpu.cpp

@@ -33,10 +33,14 @@ void GPU::Reset()
 void GPU::SoftReset()
 {
   m_GPUSTAT.bits = 0x14802000;
+  m_drawing_area = {};
+  m_drawing_offset = {};
   m_crtc_state = {};
   m_crtc_state.regs.display_address_start = 0;
   m_crtc_state.regs.horizontal_display_range = 0xC60260;
   m_crtc_state.regs.vertical_display_range = 0x3FC10;
+  m_GP0_command.clear();
+  m_GPUREAD_buffer.clear();
   m_render_state = {};
   m_render_state.texture_page_changed = true;
   m_render_state.texture_color_mode_changed = true;
@@ -48,7 +52,10 @@ void GPU::SoftReset()
 bool GPU::DoState(StateWrapper& sw)
 {
   if (sw.IsReading())
-    FlushRender();
+  {
+    // perform a reset to discard all pending draws/fb state
+    Reset();
+  }
 
   sw.Do(&m_GPUSTAT.bits);
 

src/core/gpu_hw.cpp

@@ -8,6 +8,13 @@ GPU_HW::GPU_HW() = default;
 
 GPU_HW::~GPU_HW() = default;
 
+void GPU_HW::Reset()
+{
+  GPU::Reset();
+
+  m_batch = {};
+}
+
 void GPU_HW::LoadVertices(RenderCommand rc, u32 num_vertices)
 {
   const u32 texpage =

src/core/gpu_hw.h

@@ -11,6 +11,8 @@ public:
   GPU_HW();
   virtual ~GPU_HW();
 
+  virtual void Reset() override;
+
 protected:
   struct HWVertex
   {

src/core/gpu_hw_opengl.cpp

@@ -177,6 +177,7 @@ void GPU_HW_OpenGL::ClearFramebuffer()
   glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
   glClear(GL_COLOR_BUFFER_BIT);
   glBindFramebuffer(GL_FRAMEBUFFER, 0);
+  m_vram_read_texture_dirty = true;
 }
 
 void GPU_HW_OpenGL::DestroyFramebuffer()