mesa downgrade, README: Win95 installation

Author: JHRobotics

README.md

@@ -93,6 +93,25 @@ General instruction for most machines:
 
 Windows 95 haven't [Setup API](https://learn.microsoft.com/en-us/windows/win32/api/setupapi/), or if has, it isn't fully operable. This is reason why SoftGPU cannot install driver automatically.
 
+Before installation you have to enable TCP/IP because Winsock 2 depends on that and LLVM in Mesa depends on Winsock. You can do it on *Control panel*, *Network*, add *Protocol* and choose *Microsoft* and *TCP/IP*.
+
+![Windows 95 TCP/IP](resource/docs/win95ip.png)
+
+After it you can run SoftGPU, when press **Start!**, program will install all dependencies and configure and copy files but not install driver itself.
+
+After SoftGPU installer is done. Open Device Manager (right click on *My Computer*, *Device Manager*). Find VGA adapter and click on *Properties...*, tab *Driver*, *Change driver...*, *Have disk...*, navigate to SoftGPU installation folder and click on *OK*.
+
+Now you have to choose correct driver:
+
+![Windows 95 driver choice](resource/docs/win95driver3.png)
+
+- QEMU STD VGA PCI Adapter = for QEMU with **std vga** adapter
+- VBox SVGA PCI Adapter = for VirtualBox when selected `VBoxSVGA` as Graphics Controller.
+- VBox VGA PCI Adapter = for VirtualBox when selected `VBoxVGA` as Graphics Controller or VirtualBox 5.x
+- VMWare SVGA-II PCI Adapter = for VirtualBox when selected `VMSVGA` as Graphics Controller or VMware Workstation.
+
+Press *OK*, *OK* and after reboot, VM should start with the new driver.
+
 
 ## Update
 If you have an older version of SoftGPU installed, you can update without any problem: insert the CD with the latest version into the VM and click install. The installer will take care of all the necessary modifications, only to increase compatibility it is necessary to do some steps manually:

actions.c

@@ -1018,20 +1018,39 @@ BOOL setLine3DFX(char *buf, size_t bufs)
 	return TRUE;
 }
 
+BOOL setMesaDowngrade(char *buf, size_t bufs)
+{
+	(void)bufs;
+	
+	if(isSettingSet(CHBX_MESA_DOWNGRADE))
+	{
+		const char *mesadir = iniValue("[softgpu]", "mesa_alt");
+		if(mesadir)
+		{
+			strcat(buf, ",");
+			strcat(buf, mesadir);
+		}
+	}
+	
+	return TRUE;
+}
+
 linerRule_t infFixRules[] = {
 	{"CopyFiles=VBox.Copy,Dx.Copy,DX.CopyBackup,Voodoo.Copy",   TRUE, TRUE, setLineVbox},
 	{"CopyFiles=VMSvga.Copy,Dx.Copy,DX.CopyBackup,Voodoo.Copy", TRUE, TRUE, setLineSvga},
 	{"CopyFiles=Qemu.Copy,Dx.Copy,DX.CopyBackup,Voodoo.Copy",   TRUE, TRUE, setLineQemu},
-	{"AddReg=VBox.AddReg,VM.AddReg,DX.addReg,VM.regextra",                  TRUE, TRUE, setLineVboxReg},
-	{"AddReg=VMSvga.AddReg,VM.AddReg,DX.addReg,VM.regextra",                TRUE, TRUE, setLineSvgaReg},
-	{"AddReg=Qemu.AddReg,VM.AddReg,DX.addReg,VM.regextra",                  TRUE, TRUE, setLineQemuReg},
+	{"AddReg=VBox.AddReg,VM.AddReg,DX.addReg,VM.regextra",      TRUE, TRUE, setLineVboxReg},
+	{"AddReg=VMSvga.AddReg,VM.AddReg,DX.addReg,VM.regextra",    TRUE, TRUE, setLineSvgaReg},
+	{"AddReg=Qemu.AddReg,VM.AddReg,DX.addReg,VM.regextra",      TRUE, TRUE, setLineQemuReg},
 	{"HKLM,Software\\VMWSVGA,RGB565bug,,0",                     TRUE, TRUE, setBug565},
 	{"HKLM,Software\\VMWSVGA,PreferFIFO,,0",                    TRUE, TRUE, setBugPreferFifo},
 	{"HKLM,Software\\Mesa3D\\global,SVGA_CLEAR_DX_FLAGS,,1",    TRUE, TRUE, setBugDxFlags},
 	{"HKLM,Software\\VMWSVGA,VRAMLimit,,",                     FALSE, TRUE, setLimitVRAM},
 	{";mefix:",                                                FALSE, TRUE, setLineMeFix},
 	{";syscopy:",                                              FALSE, TRUE, setLineSyscopy},
 	{";3dfx:",                                                 FALSE, TRUE, setLine3DFX},
+	{"mesa3d.dll=1",                                            TRUE, TRUE, setMesaDowngrade},
+	{"vmwsgl32.dll=1",                                          TRUE, TRUE, setMesaDowngrade},
 	{NULL, FALSE, FALSE, NULL}
 };
 

resource/docs/win95driver1.png

@@ -93,7 +93,7 @@ static const settings_item_t settings_def[] =
 	{CHBX_WS2,             T_CHECKBOX,  32, "ws2",      0, NULL, NULL, 0, 0},
 	{CHBX_BLIT_SURF,       T_CHECKBOX,  33, "blit_surf", 0, NULL, NULL, 0, 0},
 	{CHBX_DMA_NEED_REREAD, T_CHECKBOX,  34, "dma_need_reread", 1, NULL, NULL, 0, 0},
-	
+	{CHBX_MESA_DOWNGRADE,  T_CHECKBOX,  35, "mesa_downgrade",  1, NULL, NULL, 0, 0},
 	{0,                    0,            0, NULL,        0, NULL, NULL, 0, 0}
 };
 

resource/docs/win95driver2.png

@@ -729,6 +729,10 @@ LRESULT CALLBACK softgpuWndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lPara
 			{
 				switch(detection_status())
 				{
+					case DETECT_OK:
+						SetTextColor((HDC)wParam, RGB(0x00,0x80,0x00));
+     				SetBkMode((HDC)wParam, TRANSPARENT);
+    				return GetClassLong(hwnd, GCL_HBRBACKGROUND);
 					case DETECT_WARN:
 						SetTextColor((HDC)wParam, RGB(255,128,64));
      				SetBkMode((HDC)wParam, TRANSPARENT);
@@ -903,7 +907,7 @@ int main(int argc, const char *argv[])
 	font = CreateFontA(DPIX(16), 0, 0, 0, FW_BOLD, FALSE, FALSE, FALSE, ANSI_CHARSET, OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY, DEFAULT_PITCH | FF_DONTCARE, NULL);
 
 	win_main = CreateWindowA(WND_SOFTGPU_CLASS_NAME, WINDOW_TITLE, SOFTGPU_WIN_STYLE|WS_VISIBLE, CW_USEDEFAULT, CW_USEDEFAULT, DPIX(600), DPIY(420), 0, 0, NULL, 0);
-	win_cust = CreateWindowA(WND_SOFTGPU_CUR_CLASS_NAME, WINDOW_TITLE, SOFTGPU_WIN_STYLE|WS_VISIBLE, CW_USEDEFAULT, CW_USEDEFAULT, DPIX(300), DPIY(300), 0, 0, NULL, 0);
+	win_cust = CreateWindowA(WND_SOFTGPU_CUR_CLASS_NAME, WINDOW_TITLE, SOFTGPU_WIN_STYLE|WS_VISIBLE, CW_USEDEFAULT, CW_USEDEFAULT, DPIX(300), DPIY(400), 0, 0, NULL, 0);
 
 	if(font)
 	{

resource/docs/win95driver3.png

@@ -103,6 +103,8 @@
 #define CHBX_BLIT_SURF 47
 #define CHBX_DMA_NEED_REREAD 48
 
+#define CHBX_MESA_DOWNGRADE 49
+
 BOOL isSettingSet(DWORD menu);
 void writeSettings();
 int intSettings(int type);

settings.c

@@ -35,6 +35,7 @@ ws2path=redist\ws2setup.exe
 ;ie98.ver=Internet Explorer 6.0
 default_profile=6
 default_path=C:\drivers\SG24.35
+mesa_alt=mesa23
 
 [defaults]
 dxflags=0
@@ -48,6 +49,7 @@ screentarget_16bpp=0
 screentarget_mouse=0
 blit_surf=0
 dma_need_reread=1
+mesa_downgrade=0
 
 [profile]
 name=QEMU (software 3D only)
@@ -59,12 +61,12 @@ glide=0
 
 [profile]
 name=VirtualBox 5.x, 6.0 (software 3D only)
-rgb565=1
 
 [profile]
 name=VirtualBox 6.1.0 - 6.1.46
 rgb565=1
 blit_surf=1
+dxflags=1
 
 [profile]
 name=VirtualBox 6.1.48 - 6.1.50
@@ -85,6 +87,7 @@ blit_surf=1
 name=VMware Workstation 16, 17
 blit_surf=0
 dma_need_reread=0
+mesa_downgrade=1
 
 [pci]
 name=VirtualBox VGA

softgpu.c

@@ -321,12 +321,19 @@ void softgpu_cur_window_create(HWND hwnd, LPARAM lParam)
 	int draw_y = 0;
 	int draw_direction = 0;
 
-	DRAW_DIRECTION_DOWN;
-	
+	DRAW_DIRECTION_RIGHT;
 	draw_x = DRAW_START_X;
 	draw_y = DRAW_START_Y;
 
-	LABEL(0, 160, LINE_HEIGHT, "Extra settings", 0);
+	LABEL(0,             200, LINE_HEIGHT, "VRAM limit (MB): ", 0);
+	INPUT(INP_VRAM_LIMIT, 50, LINE_HEIGHT, "", 0);
+	
+	draw_x = DRAW_START_X;
+	draw_y += 2*LINE_HEIGHT;
+	
+	DRAW_DIRECTION_DOWN;
+	
+	LABEL(0, CUST_WIDTH, LINE_HEIGHT, "SVGA settings", 0);
 
 	CHECKBOX(CHBX_BLIT_SURF,           CUST_WIDTH,   LINE_HEIGHT, "Blit surface to screen (VBox)");
 	CHECKBOX(CHBX_DMA_NEED_REREAD,     CUST_WIDTH,   LINE_HEIGHT, "DMA need reread (VBox)");
@@ -335,13 +342,14 @@ void softgpu_cur_window_create(HWND hwnd, LPARAM lParam)
 	CHECKBOX(CHBX_BUG_PREFER_FIFO,     CUST_WIDTH,   LINE_HEIGHT, "Prefer FIFO (VMware)");
 	CHECKBOX(CHBX_BUG_RGB565,          CUST_WIDTH,   LINE_HEIGHT, "RGB565 (VBox < 7.0.10, < 6.1.46)");
 
-	DRAW_DIRECTION_RIGHT;
-	LABEL(0,             200, LINE_HEIGHT, "VRAM limit (MB): ", 0);
-	INPUT(INP_VRAM_LIMIT, 50, LINE_HEIGHT, "", 0);
+	CHECKBOX(CHBX_MESA_DOWNGRADE,      CUST_WIDTH,   LINE_HEIGHT, "Downgrade Mesa3D (VMware)");
 
-	draw_x = DRAW_START_X;
 	draw_y += LINE_HEIGHT;
 
+	LABEL(0, CUST_WIDTH, LINE_HEIGHT, "SVGA screen target (experimental)", 0);
+	
+	DRAW_DIRECTION_RIGHT;
+	
 	LABEL(0,               200, LINE_HEIGHT, "Screen target surface (MB): ", 0);
 	INPUT(INP_SCREENTARGET, 50, LINE_HEIGHT, "", 0);