From 767c8d28ee59e6759c828c26eaccf199bb515b0e Mon Sep 17 00:00:00 2001
From: narzoul <narzoul@users.noreply.github.com>
Date: Sun, 23 Jun 2024 22:12:28 +0200
Subject: [PATCH] Added GdiStretchBltMode setting

See issue #330.
---
 DDrawCompat/Config/Config.cpp                 |  2 ++
 .../Config/Settings/GdiStretchBltMode.h       | 25 +++++++++++++++++++
 DDrawCompat/DDrawCompat.vcxproj               |  1 +
 DDrawCompat/DDrawCompat.vcxproj.filters       |  3 +++
 DDrawCompat/Gdi/DcFunctions.cpp               | 20 +++++++++++++++
 DDrawCompat/Overlay/ConfigWindow.cpp          |  3 +++
 6 files changed, 54 insertions(+)
 create mode 100644 DDrawCompat/Config/Settings/GdiStretchBltMode.h

diff --git a/DDrawCompat/Config/Config.cpp b/DDrawCompat/Config/Config.cpp
index 6021fda..ccd4431 100644
--- a/DDrawCompat/Config/Config.cpp
+++ b/DDrawCompat/Config/Config.cpp
@@ -22,6 +22,7 @@
 #include <Config/Settings/ForceD3D9On12.h>
 #include <Config/Settings/FpsLimiter.h>
 #include <Config/Settings/FullscreenMode.h>
+#include <Config/Settings/GdiStretchBltMode.h>
 #include <Config/Settings/LogLevel.h>
 #include <Config/Settings/PalettizedTextures.h>
 #include <Config/Settings/RemoveBorders.h>
@@ -78,6 +79,7 @@ namespace Config
 	Settings::ForceD3D9On12 forceD3D9On12;
 	Settings::FpsLimiter fpsLimiter;
 	Settings::FullscreenMode fullscreenMode;
+	Settings::GdiStretchBltMode gdiStretchBltMode;
 	Settings::LogLevel logLevel;
 	Settings::PalettizedTextures palettizedTextures;
 	Settings::RemoveBorders removeBorders;
diff --git a/DDrawCompat/Config/Settings/GdiStretchBltMode.h b/DDrawCompat/Config/Settings/GdiStretchBltMode.h
new file mode 100644
index 0000000..559f14b
--- /dev/null
+++ b/DDrawCompat/Config/Settings/GdiStretchBltMode.h
@@ -0,0 +1,25 @@
+#pragma once
+
+#include <Config/MappedSetting.h>
+
+namespace Config
+{
+	namespace Settings
+	{
+		class GdiStretchBltMode : public MappedSetting<UINT>
+		{
+		public:
+			static const UINT APP = 0;
+
+			GdiStretchBltMode() : MappedSetting("GdiStretchBltMode", "app", {
+				{"app", APP},
+				{"coloroncolor", COLORONCOLOR},
+				{"halftone", HALFTONE}
+				})
+			{
+			}
+		};
+	}
+
+	extern Settings::GdiStretchBltMode gdiStretchBltMode;
+}
diff --git a/DDrawCompat/DDrawCompat.vcxproj b/DDrawCompat/DDrawCompat.vcxproj
index 16c5531..6a21872 100644
--- a/DDrawCompat/DDrawCompat.vcxproj
+++ b/DDrawCompat/DDrawCompat.vcxproj
@@ -188,6 +188,7 @@
     <ClInclude Include="Config\Settings\ForceD3D9On12.h" />
     <ClInclude Include="Config\Settings\FpsLimiter.h" />
     <ClInclude Include="Config\Settings\FullscreenMode.h" />
+    <ClInclude Include="Config\Settings\GdiStretchBltMode.h" />
     <ClInclude Include="Config\Settings\LogLevel.h" />
     <ClInclude Include="Config\Settings\PalettizedTextures.h" />
     <ClInclude Include="Config\Settings\RemoveBorders.h" />
diff --git a/DDrawCompat/DDrawCompat.vcxproj.filters b/DDrawCompat/DDrawCompat.vcxproj.filters
index 3d49705..32aa36f 100644
--- a/DDrawCompat/DDrawCompat.vcxproj.filters
+++ b/DDrawCompat/DDrawCompat.vcxproj.filters
@@ -720,6 +720,9 @@
     <ClInclude Include="Config\Settings\VertexFixup.h">
       <Filter>Header Files\Config\Settings</Filter>
     </ClInclude>
+    <ClInclude Include="Config\Settings\GdiStretchBltMode.h">
+      <Filter>Header Files\Config\Settings</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="Gdi\Gdi.cpp">
diff --git a/DDrawCompat/Gdi/DcFunctions.cpp b/DDrawCompat/Gdi/DcFunctions.cpp
index 1e2c9be..5bf039e 100644
--- a/DDrawCompat/Gdi/DcFunctions.cpp
+++ b/DDrawCompat/Gdi/DcFunctions.cpp
@@ -1,5 +1,6 @@
 #include <Common/Hook.h>
 #include <Common/Log.h>
+#include <Config/Settings/GdiStretchBltMode.h>
 #include <Gdi/CompatDc.h>
 #include <Gdi/Dc.h>
 #include <Gdi/DcFunctions.h>
@@ -342,6 +343,24 @@ namespace
 		Compat::hookFunction<origFunc>(moduleName, funcName, &compatGdiTextDcFunc<origFunc>);
 	}
 
+	int WINAPI setStretchBltMode(HDC hdc, int mode)
+	{
+		LOG_FUNC("SetStretchBltMode", hdc, mode);
+		if (COLORONCOLOR == mode && HALFTONE == Config::gdiStretchBltMode.get())
+		{
+			POINT org = {};
+			GetBrushOrgEx(hdc, &org);
+			auto result = CALL_ORIG_FUNC(SetStretchBltMode)(hdc, HALFTONE);
+			SetBrushOrgEx(hdc, org.x, org.y, nullptr);
+			return LOG_RESULT(result);
+		}
+		if (HALFTONE == mode && COLORONCOLOR == Config::gdiStretchBltMode.get())
+		{
+			mode = COLORONCOLOR;
+		}
+		return LOG_RESULT(CALL_ORIG_FUNC(SetStretchBltMode)(hdc, mode));
+	}
+
 	HWND WINAPI windowFromDc(HDC dc)
 	{
 		return CALL_ORIG_FUNC(WindowFromDC)(Gdi::Dc::getOrigDc(dc));
@@ -394,6 +413,7 @@ namespace Gdi
 
 			// Device context functions
 			HOOK_GDI_DC_FUNCTION(gdi32, DrawEscape);
+			HOOK_FUNCTION(gdi32, SetStretchBltMode, setStretchBltMode);
 			HOOK_FUNCTION(user32, WindowFromDC, windowFromDc);
 
 			// Filled shape functions
diff --git a/DDrawCompat/Overlay/ConfigWindow.cpp b/DDrawCompat/Overlay/ConfigWindow.cpp
index 1179855..b5e3141 100644
--- a/DDrawCompat/Overlay/ConfigWindow.cpp
+++ b/DDrawCompat/Overlay/ConfigWindow.cpp
@@ -15,6 +15,7 @@
 #include <Config/Settings/DisplayFilter.h>
 #include <Config/Settings/FontAntialiasing.h>
 #include <Config/Settings/FpsLimiter.h>
+#include <Config/Settings/GdiStretchBltMode.h>
 #include <Config/Settings/RenderColorDepth.h>
 #include <Config/Settings/ResolutionScale.h>
 #include <Config/Settings/ResolutionScaleFilter.h>
@@ -28,6 +29,7 @@
 #include <Config/Settings/VertexFixup.h>
 #include <Config/Settings/VSync.h>
 #include <D3dDdi/Device.h>
+#include <Gdi/Gdi.h>
 #include <Gdi/GuiThread.h>
 #include <Input/Input.h>
 #include <Overlay/ConfigWindow.h>
@@ -57,6 +59,7 @@ namespace
 		{ &Config::displayFilter },
 		{ &Config::fontAntialiasing },
 		{ &Config::fpsLimiter },
+		{ &Config::gdiStretchBltMode, []() { Gdi::redraw(nullptr); } },
 		{ &Config::renderColorDepth, &D3dDdi::Device::updateAllConfig },
 		{ &Config::resolutionScale, &D3dDdi::Device::updateAllConfig },
 		{ &Config::resolutionScaleFilter },