1 files changed, 138 insertions, 0 deletions
diff --git a/Source/Core/VideoCommon/AbstractGfx.cpp b/Source/Core/VideoCommon/AbstractGfx.cpp
new file mode 100644
index 0000000000..4406cd46b6
--- /dev/null
+++ b/Source/Core/VideoCommon/AbstractGfx.cpp
@@ -0,0 +1,138 @@
+// Copyright 2023 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "VideoCommon/AbstractGfx.h"
+
+#include "Common/Assert.h"
+
+#include "VideoCommon/AbstractFramebuffer.h"
+#include "VideoCommon/AbstractTexture.h"
+#include "VideoCommon/FramebufferManager.h"
+#include "VideoCommon/RenderBase.h"
+#include "VideoCommon/ShaderCache.h"
+#include "VideoCommon/VertexManagerBase.h"
+#include "VideoCommon/VideoConfig.h"
+
+bool AbstractGfx::IsHeadless() const
+{
+  return true;
+}
+
+void AbstractGfx::BeginUtilityDrawing()
+{
+  if (g_renderer)
+    g_renderer->BeginUtilityDrawing();
+}
+
+void AbstractGfx::EndUtilityDrawing()
+{
+  if (g_renderer)
+    g_renderer->EndUtilityDrawing();
+}
+
+void AbstractGfx::SetFramebuffer(AbstractFramebuffer* framebuffer)
+{
+  m_current_framebuffer = framebuffer;
+}
+
+void AbstractGfx::SetAndDiscardFramebuffer(AbstractFramebuffer* framebuffer)
+{
+  m_current_framebuffer = framebuffer;
+}
+
+void AbstractGfx::SetAndClearFramebuffer(AbstractFramebuffer* framebuffer,
+                                         const ClearColor& color_value, float depth_value)
+{
+  m_current_framebuffer = framebuffer;
+}
+
+void AbstractGfx::ClearRegion(const MathUtil::Rectangle<int>& rc,
+                              const MathUtil::Rectangle<int>& target_rc, bool colorEnable,
+                              bool alphaEnable, bool zEnable, u32 color, u32 z)
+{
+  g_framebuffer_manager->ClearEFB(rc, colorEnable, alphaEnable, zEnable, color, z);
+}
+
+void AbstractGfx::SetViewportAndScissor(const MathUtil::Rectangle<int>& rect, float min_depth,
+                                        float max_depth)
+{
+  SetViewport(static_cast<float>(rect.left), static_cast<float>(rect.top),
+              static_cast<float>(rect.GetWidth()), static_cast<float>(rect.GetHeight()), min_depth,
+              max_depth);
+  SetScissorRect(rect);
+}
+
+void AbstractGfx::ScaleTexture(AbstractFramebuffer* dst_framebuffer,
+                               const MathUtil::Rectangle<int>& dst_rect,
+                               const AbstractTexture* src_texture,
+                               const MathUtil::Rectangle<int>& src_rect)
+{
+  ASSERT(dst_framebuffer->GetColorFormat() == AbstractTextureFormat::RGBA8);
+
+  BeginUtilityDrawing();
+
+  // The shader needs to know the source rectangle.
+  const auto converted_src_rect =
+      ConvertFramebufferRectangle(src_rect, src_texture->GetWidth(), src_texture->GetHeight());
+  const float rcp_src_width = 1.0f / src_texture->GetWidth();
+  const float rcp_src_height = 1.0f / src_texture->GetHeight();
+  const std::array<float, 4> uniforms = {{converted_src_rect.left * rcp_src_width,
+                                          converted_src_rect.top * rcp_src_height,
+                                          converted_src_rect.GetWidth() * rcp_src_width,
+                                          converted_src_rect.GetHeight() * rcp_src_height}};
+  g_vertex_manager->UploadUtilityUniforms(&uniforms, sizeof(uniforms));
+
+  // Discard if we're overwriting the whole thing.
+  if (static_cast<u32>(dst_rect.GetWidth()) == dst_framebuffer->GetWidth() &&
+      static_cast<u32>(dst_rect.GetHeight()) == dst_framebuffer->GetHeight())
+  {
+    SetAndDiscardFramebuffer(dst_framebuffer);
+  }
+  else
+  {
+    SetFramebuffer(dst_framebuffer);
+  }
+
+  SetViewportAndScissor(ConvertFramebufferRectangle(dst_rect, dst_framebuffer));
+  SetPipeline(dst_framebuffer->GetLayers() > 1 ? g_shader_cache->GetRGBA8StereoCopyPipeline() :
+                                                 g_shader_cache->GetRGBA8CopyPipeline());
+  SetTexture(0, src_texture);
+  SetSamplerState(0, RenderState::GetLinearSamplerState());
+  Draw(0, 3);
+  EndUtilityDrawing();
+  if (dst_framebuffer->GetColorAttachment())
+    dst_framebuffer->GetColorAttachment()->FinishedRendering();
+}
+
+MathUtil::Rectangle<int>
+AbstractGfx::ConvertFramebufferRectangle(const MathUtil::Rectangle<int>& rect,
+                                         const AbstractFramebuffer* framebuffer) const
+{
+  return ConvertFramebufferRectangle(rect, framebuffer->GetWidth(), framebuffer->GetHeight());
+}
+
+MathUtil::Rectangle<int>
+AbstractGfx::ConvertFramebufferRectangle(const MathUtil::Rectangle<int>& rect, u32 fb_width,
+                                         u32 fb_height) const
+{
+  MathUtil::Rectangle<int> ret = rect;
+  if (g_ActiveConfig.backend_info.bUsesLowerLeftOrigin)
+  {
+    ret.top = fb_height - rect.bottom;
+    ret.bottom = fb_height - rect.top;
+  }
+  return ret;
+}
+
+std::unique_ptr<VideoCommon::AsyncShaderCompiler> AbstractGfx::CreateAsyncShaderCompiler()
+{
+  return std::make_unique<VideoCommon::AsyncShaderCompiler>();
+}
+
+bool AbstractGfx::UseGeometryShaderForUI() const
+{
+  // OpenGL doesn't render to a 2-layer backbuffer like D3D/Vulkan for quad-buffered stereo,
+  // instead drawing twice and the eye selected by glDrawBuffer() (see Presenter::RenderXFBToScreen)
+  return g_ActiveConfig.stereo_mode == StereoMode::QuadBuffer &&
+         g_ActiveConfig.backend_info.api_type != APIType::OpenGL;
+}