Add screenshot capability.

crt.cpp

@@ -8,6 +8,14 @@
 
 #include "crt.h"
 
+// Win32
+#ifdef _WIN32
+#include "SDL.h"
+#elif __linux__
+#include "SDL/SDL.h"
+#else
+#include "SDL/SDL.h"
+#endif
 
 static int width;
 static int height;
@@ -66,6 +74,7 @@ void CRT_DAC(void){
         *pixelPointer++ = curpal[paletteIndex].b;
     }
     
+
     //Upload texture
     glBindTexture(GL_TEXTURE_2D, crtTexture);
     glTexSubImage2D(GL_TEXTURE_2D,
@@ -89,4 +98,52 @@ void CRT_DAC(void){
     
     //Flip buffer
     SDL_GL_SwapBuffers();
+	
+	Uint8 *keystate = SDL_GetKeyState(NULL);
+	static int wasPressed = 0;
+	if ( keystate[SDLK_i] ){
+		if (!wasPressed){
+			wasPressed = 1;
+			CRT_Screenshot();
+		}
+	}
+	else
+		wasPressed = 0;	
 }
+
+void CRT_Screenshot(void){
+
+  const char* filename = "screenshot.tga" ;
+
+  printf("Screenshot.\n");
+
+  //This prevents the images getting padded 
+ // when the width multiplied by 3 is not a multiple of 4
+  glPixelStorei(GL_PACK_ALIGNMENT, 1);
+ 
+  int nSize = width*height*3;
+  // First let's create our buffer, 3 channels per Pixel
+  char* dataBuffer = (char*)malloc(nSize*sizeof(char));
+ 
+  if (!dataBuffer) return;
+ 
+   // Let's fetch them from the backbuffer	
+   // We request the pixels in GL_BGR format
+  	#define GL_BGR                            0x80E0
+   glReadPixels((GLint)0, (GLint)0,(GLint)width, (GLint)height, GL_BGR, GL_UNSIGNED_BYTE, dataBuffer);
+ 
+   //Now the file creation
+   FILE *filePtr = fopen(filename, "wb");
+   if (!filePtr) return;
+ 
+ 
+   unsigned char TGAheader[12]={0,0,2,0,0,0,0,0,0,0,0,0};
+   unsigned char header[6] = { width%256,width/256,height%256,height/256,24,0};
+
+   // We write the headers
+   fwrite(TGAheader,	sizeof(unsigned char),	12,	filePtr);
+   fwrite(header,	sizeof(unsigned char),	6,	filePtr);
+   // And finally our image data
+   fwrite(dataBuffer,	sizeof(GLubyte),	nSize,	filePtr);
+   fclose(filePtr);
+}

crt.h

@@ -34,5 +34,7 @@ void CRT_Init(int width);
  */
 void CRT_DAC(void);
 
+void CRT_Screenshot(void);
+
 
 #endif

id_in.cpp

@@ -290,8 +290,13 @@ static void processEvent(SDL_Event *event)
                 if(sym < lengthof(ASCIINames) && ASCIINames[sym])
                     LastASCII = ASCIINames[sym];
             }
-            if(LastScan<SDLK_LAST)
+
+			if (LastScan<SDLK_i){
+			}
+
+			if(LastScan<SDLK_LAST){
                 Keyboard[LastScan] = 1;
+			}
             if(LastScan == SDLK_PAUSE)
                 Paused = true;
             break;
@@ -318,8 +323,9 @@ static void processEvent(SDL_Event *event)
                 }
             }
 
-            if(key<SDLK_LAST)
+			if(key<SDLK_LAST){
                 Keyboard[key] = 0;
+			}
             break;
         }
 
@@ -477,40 +483,6 @@ IN_ReadControl(int player,ControlInfo *info)
     info->dir = DirTable[((my + 1) * 3) + (mx + 1)];
 }
 
-///////////////////////////////////////////////////////////////////////////
-//
-//  IN_WaitForKey() - Waits for a scan code, then clears LastScan and
-//      returns the scan code
-//
-///////////////////////////////////////////////////////////////////////////
-ScanCode
-IN_WaitForKey(void)
-{
-    ScanCode    result;
-
-    while ((result = LastScan)==0)
-        IN_WaitAndProcessEvents();
-    LastScan = 0;
-    return(result);
-}
-
-///////////////////////////////////////////////////////////////////////////
-//
-//  IN_WaitForASCII() - Waits for an ASCII char, then clears LastASCII and
-//      returns the ASCII value
-//
-///////////////////////////////////////////////////////////////////////////
-char
-IN_WaitForASCII(void)
-{
-    char        result;
-
-    while ((result = LastASCII)==0)
-        IN_WaitAndProcessEvents();
-    LastASCII = '\0';
-    return(result);
-}
-
 ///////////////////////////////////////////////////////////////////////////
 //
 //  IN_Ack() - waits for a button or key press.  If a button is down, upon

id_in.h

@@ -136,7 +136,7 @@ typedef struct      {
                                     joyMultXH,joyMultYH;
                     } JoystickDef;
 // Global variables
-extern  volatile boolean    Keyboard[];
+extern  volatile boolean    Keyboard[];;
 extern           boolean    MousePresent;
 extern  volatile boolean    Paused;
 extern  volatile char       LastASCII;
@@ -160,8 +160,6 @@ extern  void        IN_SetupJoy(word joy,word minx,word maxx,
 extern  void        IN_StopDemo(void),IN_FreeDemoBuffer(void),
                     IN_Ack(void);
 extern  boolean     IN_UserInput(longword delay);
-extern  char        IN_WaitForASCII(void);
-extern  ScanCode    IN_WaitForKey(void);
 extern  word        IN_GetJoyButtonsDB(word joy);
 extern  const char *IN_GetScanName(ScanCode);