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![]() diff --git a/grpapi/grpapi_no-lib.h b/grpapi/grpapi_no-lib.h
--- a/grpapi/grpapi_no-lib.h
+++ b/grpapi/grpapi_no-lib.h
// the shadow's color, third byte is green,\r
// fourth byte is blue; like this:\r
// SHADOW_COLOR|0xBBGGRR00\r
+ // This can be accomplished by using the left shift\r
+ // operator like this: SHADOW_COLOR|(color << 8)\r
#define ALPHA_BLEND 0x00000008 // Blends the graphic with what it is being drawn over.\r
// The dwAlpha parameter will only be used when this\r
// flag is specified. dwAlpha is an RGB value\r
// (0xBBGGRR).\r
// Note: Because of the extra calculations required,\r
// alpha blended graphics take longer to draw\r
+#define USE_INDEX 0x00000010 // Only valid when used with a custom SetPixel function.\r
+ // This flag cannot be used in combination with\r
+ // ALPHA_BLEND or SHADOW_COLOR\r
+ // When this flag is used, the index to a color in the\r
+ // palette will be passed to your custom SetPixel\r
+ // function instead of the actual color.\r
\r
// Palette is an array of 256 DWORD's\r
// For LoadPalette and LoadGrp, lpFileName may be a file in an open mpq archive\r
extern funcDrawGrp DrawGrp;\r
extern funcGetGrpInfo GetGrpInfo;\r
\r
+typedef COLORREF (WINAPI* GETPIXELPROC)(\r
+ HDC hDC, // same value as hdcDest from DrawGrp,\r
+ // does not need to be used as an HDC,\r
+ // can be used for any other type of pointer\r
+ int X, // x-coordinate of pixel\r
+ int Y // y-coordinate of pixel\r
+);\r
+typedef void (WINAPI* SETPIXELPROC)(\r
+ HDC hDC, // same value as hdcDest from DrawGrp,\r
+ // does not need to be used as an HDC,\r
+ // can be used for any other type of pointer\r
+ int X, // x-coordinate of pixel\r
+ int Y, // y-coordinate of pixel\r
+ COLORREF clrColor // new pixel color\r
+);\r
+\r
+// Call these to have DrawGrp use custom functions for reading and drawing pixels\r
+// so that you can have it read from and write to a buffer, for example.\r
+typedef void (WINAPI* funcSetFunctionGetPixel)(GETPIXELPROC lpGetPixelProc);\r
+typedef void (WINAPI* funcSetFunctionSetPixel)(SETPIXELPROC lpSetPixelProc);\r
+extern funcSetFunctionGetPixel SetFunctionGetPixel; // Only used with ALPHA_BLEND\r
+extern funcSetFunctionSetPixel SetFunctionSetPixel;\r
+\r
+// Call this to make a different Storm.dll-compatible MPQ library be used (like SFMPQ).\r
+typedef BOOL (WINAPI* funcSetMpqDll)(LPCSTR lpDllFileName);\r
+extern funcSetMpqDll SetMpqDll;\r
+\r
// These no longer need to be called\r
typedef BOOL (WINAPI* funcLoadGrpApi)();\r
typedef void (WINAPI* funcFreeGrpApi)();\r
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