GPU: Display VRAM with 1:1 pixel ratio rather than scaling

src/core/gpu_hw_d3d11.cpp

@@ -526,7 +526,7 @@ void GPU_HW_D3D11::UpdateDisplay()
     m_host_display->SetDisplayTexture(m_vram_texture.GetD3DSRV(), m_vram_texture.GetWidth(), m_vram_texture.GetHeight(),
                                       0, 0, m_vram_texture.GetWidth(), m_vram_texture.GetHeight());
     m_host_display->SetDisplayParameters(VRAM_WIDTH, VRAM_HEIGHT, Common::Rectangle<s32>(0, 0, VRAM_WIDTH, VRAM_HEIGHT),
-                                         1.0f);
+                                         static_cast<float>(VRAM_WIDTH) / static_cast<float>(VRAM_HEIGHT));
   }
   else
   {

src/core/gpu_hw_opengl.cpp

@@ -480,7 +480,7 @@ void GPU_HW_OpenGL::UpdateDisplay()
                                       m_vram_texture.GetHeight(), m_vram_texture.GetWidth(),
                                       -static_cast<s32>(m_vram_texture.GetHeight()));
     m_host_display->SetDisplayParameters(VRAM_WIDTH, VRAM_HEIGHT, Common::Rectangle<s32>(0, 0, VRAM_WIDTH, VRAM_HEIGHT),
-                                         1.0f);
+                                         static_cast<float>(VRAM_WIDTH) / static_cast<float>(VRAM_HEIGHT));
   }
   else
   {

src/core/gpu_hw_opengl_es.cpp

@@ -344,7 +344,7 @@ void GPU_HW_OpenGL_ES::UpdateDisplay()
                                       m_vram_texture.GetHeight(), m_vram_texture.GetWidth(),
                                       -static_cast<s32>(m_vram_texture.GetHeight()));
     m_host_display->SetDisplayParameters(VRAM_WIDTH, VRAM_HEIGHT, Common::Rectangle<s32>(0, 0, VRAM_WIDTH, VRAM_HEIGHT),
-                                         1.0f);
+                                         static_cast<float>(VRAM_WIDTH) / static_cast<float>(VRAM_HEIGHT));
   }
   else
   {

src/core/gpu_sw.cpp

@@ -121,7 +121,7 @@ void GPU_SW::UpdateDisplay()
     m_host_display->SetDisplayTexture(m_display_texture->GetHandle(), VRAM_WIDTH, VRAM_HEIGHT, 0, 0, VRAM_WIDTH,
                                       VRAM_HEIGHT);
     m_host_display->SetDisplayParameters(VRAM_WIDTH, VRAM_HEIGHT, Common::Rectangle<s32>(0, 0, VRAM_WIDTH, VRAM_HEIGHT),
-                                         1.0f);
+                                         static_cast<float>(VRAM_WIDTH) / static_cast<float>(VRAM_HEIGHT));
   }
 }