399 lines
12 KiB
C
399 lines
12 KiB
C
/***********************************************************************/
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/* */
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/* Objective Caml */
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/* */
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/* Developed by Jacob Navia, based on code by J-M Geffroy and X Leroy */
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/* Copyright 2001 Institut National de Recherche en Informatique et */
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/* en Automatique. All rights reserved. This file is distributed */
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/* under the terms of the GNU Library General Public License, with */
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/* the special exception on linking described in file ../../LICENSE. */
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/* */
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/***********************************************************************/
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/* $Id$ */
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#include <fcntl.h>
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#include <signal.h>
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#include "mlvalues.h"
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#include "libgraph.h"
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#include <windows.h>
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static value gr_reset(void);
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int MouseLbuttonDown,MouseMbuttonDown,MouseRbuttonDown;
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int MouseLastX, MouseLastY;
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int LastKey = -1;
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static long tid;
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static HANDLE threadHandle;
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HWND grdisplay = NULL;
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int grscreen;
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COLORREF grwhite, grblack;
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COLORREF grbackground;
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int grCurrentColor;
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struct canvas grbstore;
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BOOL grdisplay_mode;
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BOOL grremember_mode;
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int grx, gry;
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int grcolor;
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extern HFONT * grfont;
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MSG msg;
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HANDLE EventHandle;
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static char *szOcamlWindowClass = "OcamlWindowClass";
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static BOOL gr_initialized = 0;
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CAMLprim value gr_clear_graph(void);
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HANDLE hInst;
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HFONT CreationFont(char *name)
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{
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LOGFONT CurrentFont;
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memset(&CurrentFont, 0, sizeof(LOGFONT));
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CurrentFont.lfCharSet = ANSI_CHARSET;
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CurrentFont.lfWeight = FW_NORMAL;
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CurrentFont.lfHeight = grwindow.CurrentFontSize;
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CurrentFont.lfPitchAndFamily = (BYTE) (FIXED_PITCH | FF_MODERN);
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strcpy(CurrentFont.lfFaceName, name); /* Courier */
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return (CreateFontIndirect(&CurrentFont));
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}
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void SetCoordinates(HWND hwnd)
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{
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RECT rc;
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GetClientRect(hwnd,&rc);
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grwindow.width = rc.right;
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grwindow.height = rc.bottom;
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gr_reset();
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}
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void ResetForClose(HWND hwnd)
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{
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DeleteObject(grwindow.hBitmap);
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memset(&grwindow,0,sizeof(grwindow));
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}
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static LRESULT CALLBACK GraphicsWndProc(HWND hwnd,UINT msg,WPARAM wParam,LPARAM lParam)
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{
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PAINTSTRUCT ps;
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HDC hdc;
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switch (msg) {
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// Create the MDI client invisible window
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case WM_CREATE:
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break;
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case WM_PAINT:
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hdc = BeginPaint(hwnd,&ps);
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BitBlt(hdc,0,0,grwindow.width,grwindow.height,
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grwindow.gcBitmap,0,0,SRCCOPY);
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EndPaint(hwnd,&ps);
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break;
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// Move the child windows
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case WM_SIZE:
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// Position the MDI client window between the tool and status bars
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if (wParam != SIZE_MINIMIZED) {
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SetCoordinates(hwnd);
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}
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return 0;
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// End application
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case WM_DESTROY:
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ResetForClose(hwnd);
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break;
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case WM_LBUTTONDOWN:
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MouseLbuttonDown = 1;
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break;
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case WM_LBUTTONUP:
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MouseLbuttonDown = 0;
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break;
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case WM_RBUTTONDOWN:
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MouseRbuttonDown = 1;
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break;
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case WM_RBUTTONUP:
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MouseRbuttonDown = 0;
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break;
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case WM_MBUTTONDOWN:
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MouseMbuttonDown = 1;
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break;
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case WM_MBUTTONUP:
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MouseMbuttonDown = 0;
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break;
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case WM_CHAR:
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LastKey = wParam & 0xFF;
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break;
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case WM_KEYUP:
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LastKey = -1;
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break;
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case WM_MOUSEMOVE:
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#if 0
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pt.x = GET_X_LPARAM(lParam);
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pt.y = GET_Y_LPARAM(lParam);
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MapWindowPoints(HWND_DESKTOP,grwindow.hwnd,&pt,1);
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MouseLastX = pt.x;
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MouseLastY = grwindow.height - 1 - pt.y;
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#else
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MouseLastX = GET_X_LPARAM(lParam);
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MouseLastY = grwindow.height - 1 - GET_Y_LPARAM(lParam);
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#endif
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break;
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}
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return DefWindowProc(hwnd,msg,wParam,lParam);
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}
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int DoRegisterClass(void)
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{
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WNDCLASS wc;
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memset(&wc,0,sizeof(WNDCLASS));
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wc.style = CS_HREDRAW|CS_VREDRAW |CS_DBLCLKS|CS_OWNDC ;
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wc.lpfnWndProc = (WNDPROC)GraphicsWndProc;
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wc.hInstance = hInst;
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wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
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wc.lpszClassName = szOcamlWindowClass;
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wc.lpszMenuName = 0;
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wc.hCursor = LoadCursor(NULL,IDC_ARROW);
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wc.hIcon = 0;
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return RegisterClass(&wc);
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}
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static value gr_reset(void)
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{
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RECT rc;
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int screenx,screeny;
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screenx = GetSystemMetrics(SM_CXSCREEN);
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screeny = GetSystemMetrics(SM_CYSCREEN);
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GetClientRect(grwindow.hwnd,&rc);
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grwindow.gc = GetDC(grwindow.hwnd);
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grwindow.width = rc.right;
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grwindow.height = rc.bottom;
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if (grwindow.gcBitmap == (HDC)0) {
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// grwindow.hBitmap = CreateCompatibleBitmap(grwindow.gc,grwindow.width,grwindow.height);
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grwindow.hBitmap = CreateCompatibleBitmap(grwindow.gc,screenx,screeny);
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grwindow.gcBitmap = CreateCompatibleDC(grwindow.gc);
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grwindow.tempDC = CreateCompatibleDC(grwindow.gc);
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SelectObject(grwindow.gcBitmap,grwindow.hBitmap);
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SetMapMode(grwindow.gcBitmap,MM_TEXT);
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MoveToEx(grwindow.gcBitmap,0,grwindow.height-1,0);
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BitBlt(grwindow.gcBitmap,0,0,screenx,screeny,
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grwindow.gcBitmap,0,0,WHITENESS);
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grwindow.CurrentFontSize = 15;
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grwindow.CurrentFont = CreationFont("Courier");
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}
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grwindow.CurrentColor = GetSysColor(COLOR_WINDOWTEXT);
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grwindow.grx = 0;
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grwindow.gry = 0;
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grwindow.CurrentPen = SelectObject(grwindow.gc,GetStockObject(WHITE_PEN));
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SelectObject(grwindow.gc,grwindow.CurrentPen);
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SelectObject(grwindow.gcBitmap,grwindow.CurrentPen);
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grwindow.CurrentBrush = SelectObject(grwindow.gc,GetStockObject(WHITE_BRUSH));
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SelectObject(grwindow.gc,grwindow.CurrentBrush);
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SelectObject(grwindow.gcBitmap,grwindow.CurrentBrush);
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gr_set_color(Val_long(0));
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SelectObject(grwindow.gc,grwindow.CurrentFont);
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SelectObject(grwindow.gcBitmap,grwindow.CurrentFont);
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grdisplay_mode = grremember_mode = 1;
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MoveToEx(grwindow.gc,0,grwindow.height-1,0);
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MoveToEx(grwindow.gcBitmap,0,grwindow.height-1,0);
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SetTextAlign(grwindow.gcBitmap,TA_BOTTOM);
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SetTextAlign(grwindow.gc,TA_BOTTOM);
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return Val_unit;
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}
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void SuspendGraphicThread(void)
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{
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SuspendThread(threadHandle);
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}
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void ResumeGraphicThread(void)
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{
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ResumeThread(threadHandle);
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}
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/* For handshake between the event handling thread and the main thread */
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static char * open_graph_errmsg;
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static HANDLE open_graph_event;
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static DWORD WINAPI gr_open_graph_internal(value arg)
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{
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RECT rc;
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int ret;
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int event;
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int x, y, w, h;
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int screenx,screeny;
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int attributes;
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static int registered;
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MSG msg;
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gr_initialized = TRUE;
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hInst = GetModuleHandle(NULL);
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x = y = w = h = CW_USEDEFAULT;
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sscanf(String_val(arg), "%dx%d+%d+%d", &w, &h, &x, &y);
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/* Open the display */
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if (grwindow.hwnd == NULL || !IsWindow(grwindow.hwnd)) {
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if (!registered) {
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registered = DoRegisterClass();
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if (!registered) {
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open_graph_errmsg = "Cannot register the window class";
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SetEvent(open_graph_event);
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return 1;
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}
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}
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grwindow.hwnd = CreateWindow(szOcamlWindowClass,
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WINDOW_NAME,
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WS_OVERLAPPEDWINDOW,
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x,y,
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w,h,
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NULL,0,hInst,NULL);
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if (grwindow.hwnd == NULL) {
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open_graph_errmsg = "Cannot create window";
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SetEvent(open_graph_event);
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return 1;
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}
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#if 0
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if (x != CW_USEDEFAULT) {
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rc.left = 0;
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rc.top = 0;
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rc.right = w;
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rc.bottom = h;
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AdjustWindowRect(&rc,GetWindowLong(grwindow.hwnd,GWL_STYLE),0);
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MoveWindow(grwindow.hwnd,x,y,rc.right-rc.left,rc.bottom-rc.top,1);
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}
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#endif
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}
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gr_reset();
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ShowWindow(grwindow.hwnd,SW_SHOWNORMAL);
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/* Position the current point at origin */
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grwindow.grx = 0;
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grwindow.gry = 0;
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EventHandle = CreateEvent(NULL,0,0,NULL);
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/* The global data structures are now correctly initialized.
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Restart the Caml main thread. */
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open_graph_errmsg = NULL;
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SetEvent(open_graph_event);
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/* Enter the message handling loop */
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while (GetMessage(&msg,NULL,0,0)) {
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if (InspectMessages != NULL) {
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*InspectMessages = msg;
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SetEvent(EventHandle);
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Sleep(10);
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}
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TranslateMessage(&msg); // Translates virtual key codes
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DispatchMessage(&msg); // Dispatches message to window
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if (!IsWindow(grwindow.hwnd))
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break;
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}
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return 0;
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}
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CAMLprim value gr_open_graph(value arg)
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{
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long tid;
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if (gr_initialized) return Val_unit;
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open_graph_event = CreateEvent(NULL, FALSE, FALSE, NULL);
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threadHandle =
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CreateThread(NULL,0,
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(LPTHREAD_START_ROUTINE)gr_open_graph_internal,(void **)arg,
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0,
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&tid);
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WaitForSingleObject(open_graph_event, INFINITE);
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CloseHandle(open_graph_event);
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if (open_graph_errmsg != NULL) gr_fail("%s", open_graph_errmsg);
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return Val_unit;
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}
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CAMLprim value gr_close_graph(void)
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{
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if (gr_initialized) {
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DeleteDC(grwindow.tempDC);
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DeleteDC(grwindow.gcBitmap);
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DestroyWindow(grwindow.hwnd);
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memset(&grwindow,0,sizeof(grwindow));
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gr_initialized = 0;
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}
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return Val_unit;
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}
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CAMLprim value gr_clear_graph(void)
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{
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gr_check_open();
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if(grremember_mode) {
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BitBlt(grwindow.gcBitmap,0,0,grwindow.width,grwindow.height,
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grwindow.gcBitmap,0,0,WHITENESS);
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}
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if(grdisplay_mode) {
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BitBlt(grwindow.gc,0,0,grwindow.width,grwindow.height,
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grwindow.gc,0,0,WHITENESS);
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}
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return Val_unit;
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}
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CAMLprim value gr_size_x(void)
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{
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gr_check_open();
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return Val_int(grwindow.width);
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}
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CAMLprim value gr_size_y(void)
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{
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gr_check_open();
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return Val_int(grwindow.height);
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}
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CAMLprim value gr_synchronize(void)
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{
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gr_check_open();
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BitBlt(grwindow.gc,0,0,grwindow.width,grwindow.height,
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grwindow.gcBitmap,0,0,SRCCOPY);
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return Val_unit ;
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}
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CAMLprim value gr_display_mode(value flag)
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{
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grdisplay_mode = (Int_val(flag)) ? 1 : 0;
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return Val_unit ;
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}
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CAMLprim value gr_remember_mode(value flag)
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{
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grremember_mode = (Int_val(flag)) ? 1 : 0;
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return Val_unit ;
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}
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CAMLprim value gr_sigio_signal(value unit)
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{
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return Val_unit;
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}
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CAMLprim value gr_sigio_handler(void)
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{
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return Val_unit;
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}
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/* Processing of graphic errors */
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value * caml_named_value (char * name);
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static value * graphic_failure_exn = NULL;
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void gr_fail(char *fmt, char *arg)
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{
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char buffer[1024];
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if (graphic_failure_exn == NULL) {
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graphic_failure_exn = caml_named_value("Graphics.Graphic_failure");
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if (graphic_failure_exn == NULL)
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invalid_argument("Exception Graphics.Graphic_failure not initialized, must link graphics.cma");
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}
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sprintf(buffer, fmt, arg);
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raise_with_string(*graphic_failure_exn, buffer);
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}
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void gr_check_open(void)
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{
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if (!gr_initialized) gr_fail("graphic screen not opened", NULL);
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}
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