1 files changed, 178 insertions, 0 deletions
diff --git a/MagicEx/MagicLoad.cpp b/MagicEx/MagicLoad.cpp
new file mode 100644
index 0000000..2b13a93
--- /dev/null
+++ b/MagicEx/MagicLoad.cpp
@@ -0,0 +1,178 @@
+/*  Starshatter: The Open Source Project
+    Copyright (c) 2021-2022, Starshatter: The Open Source Project Contributors
+    Copyright (c) 2011-2012, Starshatter OpenSource Distribution Contributors
+    Copyright (c) 1997-2006, Destroyer Studios LLC.
+
+    AUTHOR:       John DiCamillo
+*/
+
+#include "MagicLoad.h"
+
+#include "Bitmap.h"
+#include "Color.h"
+#include "D3DXImage.h"
+#include "Geometry.h"
+#include "Pcx.h"
+
+
+int LoadBuffer(const char* filename, BYTE*& buf, bool null_terminate)
+{
+   buf = 0;
+
+   FILE* f = ::fopen(filename, "rb");
+
+   if (f) {
+      ::fseek(f, 0, SEEK_END);
+      int len = ftell(f);
+      ::fseek(f, 0, SEEK_SET);
+
+      if (null_terminate) {
+         buf = new BYTE[len+1];
+         if (buf)
+            buf[len] = 0;
+      }
+
+      else {
+         buf = new BYTE[len];
+      }
+
+      if (buf)
+         ::fread(buf, len, 1, f);
+
+      ::fclose(f);
+
+      return len;
+   }
+
+   return 0;
+}
+
+
+int LoadTexture(const char* fname, Bitmap*& bitmap, int type)
+{
+   int   result = 0;
+
+   if (!fname || !*fname)
+      return result;
+
+   bitmap = Bitmap::CheckCache(fname);
+
+   if (!bitmap) {
+      bool pcx_file = strstr(fname, ".pcx") || strstr(fname, ".PCX");
+
+      // handle PCX formats:
+      if (pcx_file) {
+         PcxImage pcx;
+
+         if (pcx.Load((char*) fname) == PCX_OK) {
+            bitmap = new Bitmap;
+
+            // 32-bit image
+            if (pcx.himap) {
+               bitmap->CopyHighColorImage(pcx.width, pcx.height, pcx.himap);
+            }
+
+            // 8-bit image, check for 32-bit image as well
+            else if (pcx.bitmap) {
+               bitmap->CopyImage(pcx.width, pcx.height, pcx.bitmap);
+
+               char tmp[256];
+               int  len = strlen(fname);
+               bool found = false;
+
+               ZeroMemory(tmp, sizeof(tmp));
+
+               for (int i = 0; i < len && !found; i++) {
+                  if (strstr(fname + i, ".pcx") == (fname+i)) {
+                     found = true;
+                  }
+                  else {
+                     tmp[i] = fname[i];
+                  }
+               }
+
+               if (found) {
+                  strcat_s(tmp, "+.pcx");
+                  if (pcx.Load(tmp) == PCX_OK && pcx.himap != 0) {
+                     bitmap->CopyHighColorImage(pcx.width, pcx.height, pcx.himap);
+                  }
+               }
+            }
+         }
+      }
+
+      // for all other formats, use D3DX:
+      else {
+         D3DXImage d3dx;
+         if (d3dx.Load((char*) fname)) {
+            bitmap = new Bitmap;
+            bitmap->CopyHighColorImage(d3dx.width, d3dx.height, d3dx.image);
+         }
+      }
+
+      if (bitmap) {
+         LoadAlpha(fname, *bitmap, type);
+
+         bitmap->SetFilename(fname);
+         bitmap->SetType(type);
+         bitmap->MakeTexture();
+
+         Bitmap::AddToCache(bitmap);
+      }
+   }
+
+   return result;
+}
+
+int LoadAlpha(const char* name, Bitmap& bitmap, int type)
+{
+   PcxImage    pcx;
+   D3DXImage   d3dx;
+   bool        pcx_file = strstr(name, ".pcx") || strstr(name, ".PCX");
+   bool        bmp_file = strstr(name, ".bmp") || strstr(name, ".BMP");
+   bool        jpg_file = strstr(name, ".jpg") || strstr(name, ".JPG");
+   bool        png_file = strstr(name, ".png") || strstr(name, ".PNG");
+   bool        tga_file = strstr(name, ".tga") || strstr(name, ".TGA");
+
+   // check for an associated alpha-only (grayscale) bitmap:
+   char filename[256];
+   strcpy_s(filename, name);
+
+   char* dot = strrchr(filename, '.');
+   if (dot && pcx_file)
+      strcpy(dot, "@.pcx");
+   else if (dot && bmp_file)
+      strcpy(dot, "@.bmp");
+   else if (dot && jpg_file)
+      strcpy(dot, "@.jpg");
+   else if (dot && png_file)
+      strcpy(dot, "@.png");
+   else if (dot && tga_file)
+      strcpy(dot, "@.tga");
+   else
+      return 0;
+
+   // first try to load from current directory:
+   bool loaded = false;
+
+   if (pcx_file)
+      loaded = pcx.Load(filename) == PCX_OK;
+
+   else
+      loaded = d3dx.Load(filename);
+
+   // now copy the alpha values into the bitmap:
+   if (loaded) {
+      if (pcx_file && pcx.bitmap) {
+         bitmap.CopyAlphaImage(pcx.width, pcx.height, pcx.bitmap);
+      }
+      else if (pcx_file && pcx.himap) {
+         bitmap.CopyAlphaRedChannel(pcx.width, pcx.height, pcx.himap);
+      }
+      else if (d3dx.image) {
+         bitmap.CopyAlphaRedChannel(d3dx.width, d3dx.height, d3dx.image);
+      }
+   }
+
+   return 0;
+}