HostDisplay: Support screenshotting 16-bit display formats

src/core/host_display.cpp

@@ -1,4 +1,5 @@
 #include "host_display.h"
+#include "common/align.h"
 #include "common/assert.h"
 #include "common/file_system.h"
 #include "common/log.h"
@@ -277,9 +278,93 @@ std::tuple<float, float> HostDisplay::ConvertWindowCoordinatesToDisplayCoordinat
   return std::make_tuple(display_x, display_y);
 }
 
+static bool ConvertTextureDataToRGBA8(u32 width, u32 height, std::vector<u32>& texture_data, u32& texture_data_stride,
+                                      HostDisplayPixelFormat format)
+{
+  switch (format)
+  {
+    case HostDisplayPixelFormat::BGRA8:
+    {
+      for (u32 y = 0; y < height; y++)
+      {
+        u32* pixels = reinterpret_cast<u32*>(reinterpret_cast<u8*>(texture_data.data()) + (y * texture_data_stride));
+        for (u32 x = 0; x < width; x++)
+          pixels[x] = (pixels[x] & 0xFF00FF00) | ((pixels[x] & 0xFF) << 16) | ((pixels[x] >> 16) & 0xFF);
+      }
+
+      return true;
+    }
+
+    case HostDisplayPixelFormat::RGBA8:
+      return true;
+
+    case HostDisplayPixelFormat::RGB565:
+    {
+      std::vector<u32> temp(width * height);
+
+      for (u32 y = 0; y < height; y++)
+      {
+        const u8* pixels_in = reinterpret_cast<u8*>(texture_data.data()) + (y * texture_data_stride);
+        u32* pixels_out = &temp[y * width];
+
+        for (u32 x = 0; x < width; x++)
+        {
+          // RGB565 -> RGBA8
+          u16 pixel_in;
+          std::memcpy(&pixel_in, pixels_in, sizeof(u16));
+          pixels_in += sizeof(u16);
+          const u8 r5 = Truncate8(pixel_in >> 11);
+          const u8 g6 = Truncate8((pixel_in >> 5) & 0x3F);
+          const u8 b5 = Truncate8(pixel_in & 0x1F);
+          *(pixels_out++) = ZeroExtend32((r5 << 3) | (r5 & 7)) | (ZeroExtend32((g6 << 2) | (g6 & 3)) << 8) |
+                            (ZeroExtend32((b5 << 3) | (b5 & 7)) << 16) | (0xFF000000u);
+        }
+      }
+
+      texture_data = std::move(temp);
+      texture_data_stride = sizeof(u32) * width;
+      return true;
+    }
+
+    case HostDisplayPixelFormat::RGBA5551:
+    {
+      std::vector<u32> temp(width * height);
+
+      for (u32 y = 0; y < height; y++)
+      {
+        const u8* pixels_in = reinterpret_cast<u8*>(texture_data.data()) + (y * texture_data_stride);
+        u32* pixels_out = &temp[y * width];
+
+        for (u32 x = 0; x < width; x++)
+        {
+          // RGBA5551 -> RGBA8
+          u16 pixel_in;
+          std::memcpy(&pixel_in, pixels_in, sizeof(u16));
+          pixels_in += sizeof(u16);
+          const u8 a1 = Truncate8(pixel_in >> 15);
+          const u8 r5 = Truncate8((pixel_in >> 10) & 0x1F);
+          const u8 g6 = Truncate8((pixel_in >> 5) & 0x1F);
+          const u8 b5 = Truncate8(pixel_in & 0x1F);
+          *(pixels_out++) = ZeroExtend32((r5 << 3) | (r5 & 7)) | (ZeroExtend32((g6 << 3) | (g6 & 7)) << 8) |
+                            (ZeroExtend32((b5 << 3) | (b5 & 7)) << 16) | (a1 ? 0xFF000000u : 0u);
+        }
+      }
+
+      texture_data = std::move(temp);
+      texture_data_stride = sizeof(u32) * width;
+      return true;
+    }
+
+    default:
+      Log_ErrorPrintf("Unknown pixel format %u", static_cast<u32>(format));
+      return false;
+  }
+}
+
 static bool CompressAndWriteTextureToFile(u32 width, u32 height, std::string filename, FileSystem::ManagedCFilePtr fp,
                                           bool clear_alpha, bool flip_y, u32 resize_width, u32 resize_height,
-                                          std::vector<u32> texture_data, u32 texture_data_stride)
+                                          std::vector<u32> texture_data, u32 texture_data_stride,
+                                          HostDisplayPixelFormat texture_format)
 {
 
   const char* extension = std::strrchr(filename.c_str(), '.');
@@ -289,6 +374,9 @@ static bool CompressAndWriteTextureToFile(u32 width, u32 height, std::string fil
     return false;
   }
 
+  if (!ConvertTextureDataToRGBA8(width, height, texture_data, texture_data_stride, texture_format))
+    return false;
+
   if (clear_alpha)
   {
     for (u32& pixel : texture_data)
@@ -359,13 +447,13 @@ static bool CompressAndWriteTextureToFile(u32 width, u32 height, std::string fil
 }
 
 bool HostDisplay::WriteTextureToFile(const void* texture_handle, u32 x, u32 y, u32 width, u32 height,
-                                     std::string filename, bool clear_alpha /* = true */, bool flip_y /* = false */,
-                                     u32 resize_width /* = 0 */, u32 resize_height /* = 0 */,
+                                     HostDisplayPixelFormat format, std::string filename, bool clear_alpha /* = true */,
+                                     bool flip_y /* = false */, u32 resize_width /* = 0 */, u32 resize_height /* = 0 */,
                                      bool compress_on_thread /* = false */)
 {
   std::vector<u32> texture_data(width * height);
-  u32 texture_data_stride = sizeof(u32) * width;
-  if (!DownloadTexture(texture_handle, x, y, width, height, texture_data.data(), texture_data_stride))
+  u32 texture_data_stride = Common::AlignUpPow2(GetDisplayPixelFormatSize(format) * width, 4);
+  if (!DownloadTexture(texture_handle, format, x, y, width, height, texture_data.data(), texture_data_stride))
   {
     Log_ErrorPrintf("Texture download failed");
     return false;
@@ -381,12 +469,13 @@ bool HostDisplay::WriteTextureToFile(const void* texture_handle, u32 x, u32 y, u
   if (!compress_on_thread)
   {
     return CompressAndWriteTextureToFile(width, height, std::move(filename), std::move(fp), clear_alpha, flip_y,
-                                         resize_width, resize_height, std::move(texture_data), texture_data_stride);
+                                         resize_width, resize_height, std::move(texture_data), texture_data_stride,
+                                         format);
   }
 
   std::thread compress_thread(CompressAndWriteTextureToFile, width, height, std::move(filename), std::move(fp),
                               clear_alpha, flip_y, resize_width, resize_height, std::move(texture_data),
-                              texture_data_stride);
+                              texture_data_stride, format);
   compress_thread.detach();
   return true;
 }
@@ -394,7 +483,7 @@ bool HostDisplay::WriteTextureToFile(const void* texture_handle, u32 x, u32 y, u
 bool HostDisplay::WriteDisplayTextureToFile(std::string filename, bool full_resolution /* = true */,
                                             bool apply_aspect_ratio /* = true */, bool compress_on_thread /* = false */)
 {
-  if (!m_display_texture_handle || m_display_texture_format != HostDisplayPixelFormat::RGBA8)
+  if (!m_display_texture_handle)
     return false;
 
   apply_aspect_ratio = (m_display_aspect_ratio > 0) ? apply_aspect_ratio : false;
@@ -454,14 +543,14 @@ bool HostDisplay::WriteDisplayTextureToFile(std::string filename, bool full_reso
   }
 
   return WriteTextureToFile(m_display_texture_handle, m_display_texture_view_x, read_y, m_display_texture_view_width,
-                            read_height, std::move(filename), true, flip_y, static_cast<u32>(resize_width),
-                            static_cast<u32>(resize_height), compress_on_thread);
+                            read_height, m_display_texture_format, std::move(filename), true, flip_y,
+                            static_cast<u32>(resize_width), static_cast<u32>(resize_height), compress_on_thread);
 }
 
 bool HostDisplay::WriteDisplayTextureToBuffer(std::vector<u32>* buffer, u32 resize_width /* = 0 */,
                                               u32 resize_height /* = 0 */, bool clear_alpha /* = true */)
 {
-  if (!m_display_texture_handle || m_display_texture_format != HostDisplayPixelFormat::RGBA8)
+  if (!m_display_texture_handle)
     return false;
 
   const bool flip_y = (m_display_texture_view_height < 0);
@@ -478,14 +567,17 @@ bool HostDisplay::WriteDisplayTextureToBuffer(std::vector<u32>* buffer, u32 resi
   u32 width = static_cast<u32>(read_width);
   u32 height = static_cast<u32>(read_height);
   std::vector<u32> texture_data(width * height);
-  u32 texture_data_stride = sizeof(u32) * width;
-  if (!DownloadTexture(m_display_texture_handle, read_x, read_y, width, height, texture_data.data(),
-                       texture_data_stride))
+  u32 texture_data_stride = Common::AlignUpPow2(GetDisplayPixelFormatSize(m_display_texture_format) * width, 4);
+  if (!DownloadTexture(m_display_texture_handle, m_display_texture_format, read_x, read_y, width, height,
+                       texture_data.data(), texture_data_stride))
   {
     Log_ErrorPrintf("Failed to download texture from GPU.");
     return false;
   }
 
+  if (!ConvertTextureDataToRGBA8(width, height, texture_data, texture_data_stride, m_display_texture_format))
+    return false;
+
   if (clear_alpha)
   {
     for (u32& pixel : texture_data)

src/core/host_display.h

@@ -95,8 +95,8 @@ public:
   virtual void UpdateTexture(HostDisplayTexture* texture, u32 x, u32 y, u32 width, u32 height, const void* data,
                              u32 data_stride) = 0;
 
-  virtual bool DownloadTexture(const void* texture_handle, u32 x, u32 y, u32 width, u32 height, void* out_data,
-                               u32 out_data_stride) = 0;
+  virtual bool DownloadTexture(const void* texture_handle, HostDisplayPixelFormat texture_format, u32 x, u32 y,
+                               u32 width, u32 height, void* out_data, u32 out_data_stride) = 0;
 
   /// Returns false if the window was completely occluded.
   virtual bool Render() = 0;
@@ -194,8 +194,9 @@ public:
                                                                         s32 window_height, s32 top_margin) const;
 
   /// Helper function to save texture data to a PNG. If flip_y is set, the image will be flipped aka OpenGL.
-  bool WriteTextureToFile(const void* texture_handle, u32 x, u32 y, u32 width, u32 height, std::string filename,
-                          bool clear_alpha = true, bool flip_y = false, u32 resize_width = 0, u32 resize_height = 0,
+  bool WriteTextureToFile(const void* texture_handle, u32 x, u32 y, u32 width, u32 height,
+                          HostDisplayPixelFormat format, std::string filename, bool clear_alpha = true,
+                          bool flip_y = false, u32 resize_width = 0, u32 resize_height = 0,
                           bool compress_on_thread = false);
 
   /// Helper function to save current display texture to PNG.

src/duckstation-libretro/libretro_host_display.cpp

@@ -156,8 +156,8 @@ void LibretroHostDisplay::UpdateTexture(HostDisplayTexture* texture, u32 x, u32
 {
 }
 
-bool LibretroHostDisplay::DownloadTexture(const void* texture_handle, u32 x, u32 y, u32 width, u32 height,
-                                          void* out_data, u32 out_data_stride)
+bool LibretroHostDisplay::DownloadTexture(const void* texture_handle, HostDisplayPixelFormat texture_format, u32 x,
+                                          u32 y, u32 width, u32 height, void* out_data, u32 out_data_stride)
 {
   return false;
 }

src/duckstation-libretro/libretro_host_display.h

@@ -38,8 +38,8 @@ public:
                                                     bool dynamic) override;
   void UpdateTexture(HostDisplayTexture* texture, u32 x, u32 y, u32 width, u32 height, const void* data,
                      u32 data_stride) override;
-  bool DownloadTexture(const void* texture_handle, u32 x, u32 y, u32 width, u32 height, void* out_data,
-                       u32 out_data_stride) override;
+  bool DownloadTexture(const void* texture_handle, HostDisplayPixelFormat texture_format, u32 x, u32 y, u32 width,
+                       u32 height, void* out_data, u32 out_data_stride) override;
 
   void SetVSync(bool enabled) override;
 

src/frontend-common/d3d11_host_display.cpp

@@ -155,8 +155,8 @@ void D3D11HostDisplay::UpdateTexture(HostDisplayTexture* texture, u32 x, u32 y,
   }
 }
 
-bool D3D11HostDisplay::DownloadTexture(const void* texture_handle, u32 x, u32 y, u32 width, u32 height, void* out_data,
-                                       u32 out_data_stride)
+bool D3D11HostDisplay::DownloadTexture(const void* texture_handle, HostDisplayPixelFormat texture_format, u32 x, u32 y,
+                                       u32 width, u32 height, void* out_data, u32 out_data_stride)
 {
   ID3D11ShaderResourceView* srv =
     const_cast<ID3D11ShaderResourceView*>(static_cast<const ID3D11ShaderResourceView*>(texture_handle));
@@ -169,8 +169,17 @@ bool D3D11HostDisplay::DownloadTexture(const void* texture_handle, u32 x, u32 y,
     return false;
 
   m_readback_staging_texture.CopyFromTexture(m_context.Get(), srv_resource.Get(), 0, x, y, 0, 0, width, height);
-  return m_readback_staging_texture.ReadPixels<u32>(m_context.Get(), 0, 0, width, height, out_data_stride / sizeof(u32),
-                                                    static_cast<u32*>(out_data));
+
+  if (srv_desc.Format == DXGI_FORMAT_B5G6R5_UNORM || srv_desc.Format == DXGI_FORMAT_B5G5R5A1_UNORM)
+  {
+    return m_readback_staging_texture.ReadPixels<u16>(m_context.Get(), 0, 0, width, height,
+                                                      out_data_stride / sizeof(u16), static_cast<u16*>(out_data));
+  }
+  else
+  {
+    return m_readback_staging_texture.ReadPixels<u32>(m_context.Get(), 0, 0, width, height,
+                                                      out_data_stride / sizeof(u32), static_cast<u32*>(out_data));
+  }
 }
 
 static constexpr std::array<DXGI_FORMAT, static_cast<u32>(HostDisplayPixelFormat::Count)>

src/frontend-common/d3d11_host_display.h

@@ -55,8 +55,8 @@ public:
                                                     u32 initial_data_stride, bool dynamic) override;
   void UpdateTexture(HostDisplayTexture* texture, u32 x, u32 y, u32 width, u32 height, const void* texture_data,
                      u32 texture_data_stride) override;
-  bool DownloadTexture(const void* texture_handle, u32 x, u32 y, u32 width, u32 height, void* out_data,
-                       u32 out_data_stride) override;
+  bool DownloadTexture(const void* texture_handle, HostDisplayPixelFormat texture_format, u32 x, u32 y, u32 width,
+                       u32 height, void* out_data, u32 out_data_stride) override;
   bool SupportsDisplayPixelFormat(HostDisplayPixelFormat format) const override;
   bool BeginSetDisplayPixels(HostDisplayPixelFormat format, u32 width, u32 height, void** out_buffer,
                              u32* out_pitch) override;

src/frontend-common/opengl_host_display.cpp

@@ -83,46 +83,6 @@ std::unique_ptr<HostDisplayTexture> OpenGLHostDisplay::CreateTexture(u32 width,
   return OpenGLHostDisplayTexture::Create(width, height, initial_data, initial_data_stride);
 }
 
-void OpenGLHostDisplay::UpdateTexture(HostDisplayTexture* texture, u32 x, u32 y, u32 width, u32 height,
-                                      const void* texture_data, u32 texture_data_stride)
-{
-  OpenGLHostDisplayTexture* tex = static_cast<OpenGLHostDisplayTexture*>(texture);
-  Assert((texture_data_stride % sizeof(u32)) == 0);
-
-  GLint old_texture_binding = 0, old_alignment = 0, old_row_length = 0;
-  glGetIntegerv(GL_TEXTURE_BINDING_2D, &old_texture_binding);
-  glGetIntegerv(GL_UNPACK_ALIGNMENT, &old_alignment);
-  glGetIntegerv(GL_UNPACK_ROW_LENGTH, &old_row_length);
-
-  glBindTexture(GL_TEXTURE_2D, tex->GetGLID());
-  glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
-  glPixelStorei(GL_UNPACK_ROW_LENGTH, texture_data_stride / sizeof(u32));
-
-  glTexSubImage2D(GL_TEXTURE_2D, 0, x, y, width, height, GL_RGBA, GL_UNSIGNED_BYTE, texture_data);
-
-  glPixelStorei(GL_UNPACK_ALIGNMENT, old_alignment);
-  glPixelStorei(GL_UNPACK_ROW_LENGTH, old_row_length);
-  glBindTexture(GL_TEXTURE_2D, old_texture_binding);
-}
-
-bool OpenGLHostDisplay::DownloadTexture(const void* texture_handle, u32 x, u32 y, u32 width, u32 height, void* out_data,
-                                        u32 out_data_stride)
-{
-  GLint old_alignment = 0, old_row_length = 0;
-  glGetIntegerv(GL_PACK_ALIGNMENT, &old_alignment);
-  glGetIntegerv(GL_PACK_ROW_LENGTH, &old_row_length);
-  glPixelStorei(GL_PACK_ALIGNMENT, sizeof(u32));
-  glPixelStorei(GL_PACK_ROW_LENGTH, out_data_stride / sizeof(u32));
-
-  const GLuint texture = static_cast<GLuint>(reinterpret_cast<uintptr_t>(texture_handle));
-  GL::Texture::GetTextureSubImage(texture, 0, x, y, 0, width, height, 1, GL_RGBA, GL_UNSIGNED_BYTE,
-                                  height * out_data_stride, out_data);
-
-  glPixelStorei(GL_PACK_ALIGNMENT, old_alignment);
-  glPixelStorei(GL_PACK_ROW_LENGTH, old_row_length);
-  return true;
-}
-
 static constexpr std::array<std::tuple<GLenum, GLenum, GLenum>, static_cast<u32>(HostDisplayPixelFormat::Count)>
   s_display_pixel_format_mapping = {{
     {},                                                  // Unknown
@@ -132,6 +92,65 @@ static constexpr std::array<std::tuple<GLenum, GLenum, GLenum>, static_cast<u32>
     {GL_RGB5_A1, GL_BGRA, GL_UNSIGNED_SHORT_1_5_5_5_REV} // RGBA5551
   }};
 
+void OpenGLHostDisplay::UpdateTexture(HostDisplayTexture* texture, u32 x, u32 y, u32 width, u32 height,
+                                      const void* texture_data, u32 texture_data_stride)
+{
+  OpenGLHostDisplayTexture* tex = static_cast<OpenGLHostDisplayTexture*>(texture);
+  const auto [gl_internal_format, gl_format, gl_type] =
+    s_display_pixel_format_mapping[static_cast<u32>(texture->GetFormat())];
+  GLint alignment;
+  if (texture_data_stride & 1)
+    alignment = 1;
+  else if (texture_data_stride & 2)
+    alignment = 2;
+  else
+    alignment = 4;
+
+  GLint old_texture_binding = 0, old_alignment = 0, old_row_length = 0;
+  glGetIntegerv(GL_TEXTURE_BINDING_2D, &old_texture_binding);
+  glGetIntegerv(GL_UNPACK_ALIGNMENT, &old_alignment);
+  glGetIntegerv(GL_UNPACK_ROW_LENGTH, &old_row_length);
+
+  glBindTexture(GL_TEXTURE_2D, tex->GetGLID());
+  glPixelStorei(GL_UNPACK_ALIGNMENT, alignment);
+  glPixelStorei(GL_UNPACK_ROW_LENGTH, texture_data_stride / GetDisplayPixelFormatSize(texture->GetFormat()));
+
+  glTexSubImage2D(GL_TEXTURE_2D, 0, x, y, width, height, gl_format, gl_type, texture_data);
+
+  glPixelStorei(GL_UNPACK_ALIGNMENT, old_alignment);
+  glPixelStorei(GL_UNPACK_ROW_LENGTH, old_row_length);
+  glBindTexture(GL_TEXTURE_2D, old_texture_binding);
+}
+
+bool OpenGLHostDisplay::DownloadTexture(const void* texture_handle, HostDisplayPixelFormat texture_format, u32 x, u32 y,
+                                        u32 width, u32 height, void* out_data, u32 out_data_stride)
+{
+  GLint alignment;
+  if (out_data_stride & 1)
+    alignment = 1;
+  else if (out_data_stride & 2)
+    alignment = 2;
+  else
+    alignment = 4;
+
+  GLint old_alignment = 0, old_row_length = 0;
+  glGetIntegerv(GL_PACK_ALIGNMENT, &old_alignment);
+  glGetIntegerv(GL_PACK_ROW_LENGTH, &old_row_length);
+  glPixelStorei(GL_PACK_ALIGNMENT, alignment);
+  glPixelStorei(GL_PACK_ROW_LENGTH, out_data_stride / GetDisplayPixelFormatSize(texture_format));
+
+  const GLuint texture = static_cast<GLuint>(reinterpret_cast<uintptr_t>(texture_handle));
+  const auto [gl_internal_format, gl_format, gl_type] =
+    s_display_pixel_format_mapping[static_cast<u32>(texture_format)];
+
+  GL::Texture::GetTextureSubImage(texture, 0, x, y, 0, width, height, 1, gl_format, gl_type, height * out_data_stride,
+                                  out_data);
+
+  glPixelStorei(GL_PACK_ALIGNMENT, old_alignment);
+  glPixelStorei(GL_PACK_ROW_LENGTH, old_row_length);
+  return true;
+}
+
 bool OpenGLHostDisplay::SupportsDisplayPixelFormat(HostDisplayPixelFormat format) const
 {
   return (std::get<0>(s_display_pixel_format_mapping[static_cast<u32>(format)]) != static_cast<GLenum>(0));

src/frontend-common/opengl_host_display.h

@@ -55,8 +55,8 @@ public:
                                                     u32 initial_data_stride, bool dynamic) override;
   void UpdateTexture(HostDisplayTexture* texture, u32 x, u32 y, u32 width, u32 height, const void* texture_data,
                      u32 texture_data_stride) override;
-  bool DownloadTexture(const void* texture_handle, u32 x, u32 y, u32 width, u32 height, void* out_data,
-                       u32 out_data_stride) override;
+  bool DownloadTexture(const void* texture_handle, HostDisplayPixelFormat texture_format, u32 x, u32 y, u32 width,
+                       u32 height, void* out_data, u32 out_data_stride) override;
   bool SupportsDisplayPixelFormat(HostDisplayPixelFormat format) const override;
   bool BeginSetDisplayPixels(HostDisplayPixelFormat format, u32 width, u32 height, void** out_buffer,
                              u32* out_pitch) override;

src/frontend-common/vulkan_host_display.cpp

@@ -230,14 +230,13 @@ void VulkanHostDisplay::UpdateTexture(HostDisplayTexture* texture, u32 x, u32 y,
   staging_texture->CopyToTexture(0, 0, vk_texture->GetTexture(), x, y, 0, 0, width, height);
 }
 
-bool VulkanHostDisplay::DownloadTexture(const void* texture_handle, u32 x, u32 y, u32 width, u32 height, void* out_data,
-                                        u32 out_data_stride)
+bool VulkanHostDisplay::DownloadTexture(const void* texture_handle, HostDisplayPixelFormat texture_format, u32 x, u32 y,
+                                        u32 width, u32 height, void* out_data, u32 out_data_stride)
 {
   Vulkan::Texture* texture = static_cast<Vulkan::Texture*>(const_cast<void*>(texture_handle));
 
   if ((m_readback_staging_texture.GetWidth() < width || m_readback_staging_texture.GetHeight() < height) &&
-      !m_readback_staging_texture.Create(Vulkan::StagingBuffer::Type::Readback, VK_FORMAT_R8G8B8A8_UNORM, width,
-                                         height))
+      !m_readback_staging_texture.Create(Vulkan::StagingBuffer::Type::Readback, texture->GetFormat(), width, height))
   {
     return false;
   }

src/frontend-common/vulkan_host_display.h

@@ -52,8 +52,8 @@ public:
                                                     u32 initial_data_stride, bool dynamic) override;
   void UpdateTexture(HostDisplayTexture* texture, u32 x, u32 y, u32 width, u32 height, const void* texture_data,
                      u32 texture_data_stride) override;
-  bool DownloadTexture(const void* texture_handle, u32 x, u32 y, u32 width, u32 height, void* out_data,
-                       u32 out_data_stride) override;
+  bool DownloadTexture(const void* texture_handle, HostDisplayPixelFormat texture_format, u32 x, u32 y, u32 width,
+                       u32 height, void* out_data, u32 out_data_stride) override;
 
   bool SupportsDisplayPixelFormat(HostDisplayPixelFormat format) const override;
   bool BeginSetDisplayPixels(HostDisplayPixelFormat format, u32 width, u32 height, void** out_buffer,