Initial commitment for the basic rendering framework.

README.md

@@ -1,4 +1,6 @@
 water_simulation
 ================
 
-Water rending with software render
+Water rending with software render
+
+Feel free to create your own project to the repository.

water_rendering/README.txt

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+This is the basic rendering framework using WIN32.
+Do all the rending work in render(BackBuffer*) function, which is declared in render_wrapper.cpp.

water_rendering/main.cpp

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+#include <windows.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "render_wrapper.h"
+
+HWND winhwnd;
+int window_width =800;
+int window_height = 600;
+struct BackBuffer back_buffer;
+TCHAR * win_name = TEXT("Water") ;
+
+// prototypes
+LRESULT CALLBACK WndProc ( HWND, UINT, WPARAM, LPARAM );
+int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd );
+
+
+inline void draw()
+{
+	render(&back_buffer);
+
+	HDC winhdc = GetDC( winhwnd ) ;
+	// Now copy the back buffer to the front buffer.
+	BitBlt(
+
+	winhdc,	// destination buffer
+	0, 0,	// x, y to start writing to in the destination buffer
+	// counted from top left corner of dest HDC (window)
+
+	// Width, height to copy for
+	back_buffer.width, back_buffer.height,
+
+	back_buffer.back_dc, // SOURCE buffer.  We're taking from that back canvas
+
+	0, 0,		// x pt, y pt to START copying from
+	// SOURCE.  counted from top left again
+
+	// And we just want a straight copy.
+	SRCCOPY );
+
+	ReleaseDC( winhwnd, winhdc ) ;
+}
+
+
+
+
+void InitBackBuffer()
+{
+	back_buffer.width = window_width;
+	back_buffer.height = window_height;
+
+	HDC winhdc = GetDC( winhwnd );
+
+	/*
+
+	Imagine you have 2 things:
+	- a canvas on which to draw (call this your HBITMAP)
+	- set of brushes you will use to draw (call this your HDC)
+
+	1.  HBITMAP.  Canvas
+	___________________
+	|       *         |
+	|   *             |
+	|     HBITMAP     |
+	|    draw here    |
+	|_________________|
+
+	2.  HDC.  Set of brushes.
+	<-*
+	[]-*
+	()-*
+
+	*/
+
+	// Create the HBITMAP "canvas", or surface on which we will draw.
+	back_buffer.buffer_bmp = CreateCompatibleBitmap( winhdc, back_buffer.width, back_buffer.height );
+	if(back_buffer.buffer_bmp == NULL)
+	printf( "failed to create BackBufferBMP" );
+
+
+	// Create the HDC "device context", or collection of tools
+	// and brushes that we can use to draw on our canvas
+	back_buffer.back_dc = CreateCompatibleDC( winhdc );
+	if(back_buffer.back_dc == NULL)
+	printf( "failed to create the backDC" );
+
+	// Permanently associate the surface on which to draw
+	// ("canvas") (HBITMAP), with the "set of brushes" (HDC)
+
+	// "select in" the backBufferBMP into the backDC
+	HBITMAP oldbmp = (HBITMAP)SelectObject( back_buffer.back_dc, back_buffer.buffer_bmp );
+
+
+	// Delete the "canvas" that the backDC was
+	// going to draw to.  We don't care about it.
+	DeleteObject( oldbmp );
+
+
+
+	/// Release the dc of the main window itself
+	ReleaseDC( winhwnd, winhdc );
+}
+
+
+// Just as said every C++ program starts at main,              //
+// every Windows program will start at WinMain.                //
+/////////////////////////////////////////////////////////////////
+int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance,
+                   LPSTR lpCmdLine, int nShowCmd )
+{
+#pragma region get window up
+  WNDCLASSEX window = { 0 } ;
+  window.cbSize			= sizeof(WNDCLASSEX);
+  window.hbrBackground	= (HBRUSH) GetStockObject(WHITE_BRUSH);		// BLACK_BRUSH, DKGRAY_BRUSH
+  window.hCursor = LoadCursor(NULL, IDC_ARROW);			// load hand cursor.. make to guitar
+  window.hIcon = LoadIcon(NULL, IDI_APPLICATION);		// large icon for app
+  window.hIconSm = LoadIcon(NULL, IDI_APPLICATION);		// small icon that shows up in top left of window
+  window.hInstance = hInstance;							// program's instance handle that was first passed to WinMain by windows when program was first run
+  window.lpfnWndProc = WndProc;								// function pointer to WndProc function
+  window.lpszClassName = win_name;							// window class name
+  window.lpszMenuName = NULL;									// menu name -- but our app has no menu now
+  window.style = CS_HREDRAW | CS_VREDRAW;				// window style --
+
+  if(!RegisterClassEx( &window ))
+  {
+    MessageBox(NULL, TEXT("Something's wrong with the WNDCLASSEX structure you defined.. quitting"), TEXT("Error"), MB_OK);
+    return 1;		// return from WinMain.. i.e. quit
+  }
+
+  // CREATE THE WINDOW AND KEEP THE HANDLE TO IT.
+  winhwnd = CreateWindowEx(	0/*WS_EX_TOPMOST*/,			// extended window style.. this sets the window to being always on top
+    win_name,			// window class name.. defined above
+    TEXT("Water"),// title bar of window
+    WS_OVERLAPPEDWINDOW,// window style
+    400, 200,		        // initial x, y start position of window
+    window_width, window_height,	          // initial width, height of window.  Can also be CW_USEDEFAULT to let Windows choose these values
+    NULL, NULL,			  	// parent window, window menu
+    hInstance, NULL);		// program instance handle, creation params
+
+  // now we show and paint our window, so it appears
+  ShowWindow( winhwnd, nShowCmd );		// you have to ask that your Window be shown to see it
+  UpdateWindow(winhwnd);					// paint the window
+#pragma endregion
+
+#pragma region message loop
+
+  MSG			msg;
+
+  while(1)
+  {
+    if(PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
+    {
+      if(msg.message == WM_QUIT)
+      {
+        PostQuitMessage(0);
+        break;
+      }
+      TranslateMessage(&msg);	// translates 'character' keyboard messages
+      DispatchMessage(&msg);	// send off to WndProc for processing
+    }
+    else
+    {
+      // could put more update code in here
+      // before drawing.
+      draw();
+    }
+  }
+#pragma endregion
+
+  return 0;	// end program once we exit the message loop
+}
+
+
+
+
+////////////////////////////////////////////////////////////////////////
+// WndProc - "Window procedure" function
+LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
+{
+  switch(message)
+  {
+  case WM_CREATE:
+    {
+      // As soon as the window is first created, create
+      // the back buffer.
+      InitBackBuffer() ;
+
+      return 0;
+    }
+    break;
+
+  case WM_DESTROY:
+    {
+      PostQuitMessage(0);
+      return 0;
+    }
+    break;
+  }
+
+  // If message was NOT handled by us, we pass it off to
+  // the windows operating system to handle it.
+  return DefWindowProc(hwnd, message, wParam, lParam);
+}

water_rendering/render_wrapper.cpp

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+#include "render_wrapper.h"
+
+#include <stdio.h>
+
+void render(struct BackBuffer* bf)
+{
+	// now just draw something into it for fun
+	char buf[300];
+	sprintf( buf, "HELLO WATER!" );
+	SetBkColor(bf->back_dc, RGB(0, 0, 0));
+	SetTextColor(bf->back_dc, RGB(255,255,255));
+	TextOutA( bf->back_dc, 20, 20, buf, strlen(buf) );
+
+	//Draw a simple rectangle using SetPixel.
+	for(int i = 50 ; i<=150; i++)
+		for(int j = 50; j<=150; j++)
+			SetPixel(bf->back_dc, i, j, RGB(255,0,0));
+}

water_rendering/render_wrapper.h

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+#include <windows.h>
+
+struct BackBuffer
+{
+	int width, height;
+	HDC back_dc;
+	HBITMAP buffer_bmp;
+};
+
+/*
+* All the rendering related stuffs goes here
+*/
+void render(struct BackBuffer* bf);

water_rendering/water_rendering.sln

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+
+Microsoft Visual Studio Solution File, Format Version 11.00
+# Visual Studio 2010
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+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Win32 = Debug|Win32
+		Release|Win32 = Release|Win32
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
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+		{D4C3C817-A565-4C3C-A75F-25B46A86CC42}.Debug|Win32.Build.0 = Debug|Win32
+		{D4C3C817-A565-4C3C-A75F-25B46A86CC42}.Release|Win32.ActiveCfg = Release|Win32
+		{D4C3C817-A565-4C3C-A75F-25B46A86CC42}.Release|Win32.Build.0 = Release|Win32
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

water_rendering/water_rendering.vcxproj

@@ -0,0 +1,73 @@
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water_rendering/water_rendering.vcxproj.filters

@@ -0,0 +1,30 @@
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water_rendering/water_rendering.vcxproj.user

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