ReactOS  0.4.15-dev-5097-g328cc41
3dtext.c
Go to the documentation of this file.
1 /*
2  * Copyright 2000 Jeff Molofee http://nehe.gamedev.net/ (Original code)
3  * Copyright 2006 Eric Kohl
4  * Copyright 2007 Marc Piulachs (marc.piulachs@codexchange.net) - minor modifications , converted to screensaver
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License along
17  * with this program; if not, write to the Free Software Foundation, Inc.,
18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19  */
20 
21 #include "3dtext.h"
22 
23 #include <winbase.h>
24 #include <wingdi.h>
25 #include <winuser.h>
26 #include <scrnsave.h>
27 #include <math.h>
28 #include <GL/glu.h>
29 
30 #include "resource.h"
31 
32 static HGLRC hRC; // Permanent Rendering Context
33 static HDC hDC; // Private GDI Device Context
34 
35 GLuint base; // Base Display List For The Font Set
36 GLfloat rot; // Used To Rotate The Text
39 
40 #define APPNAME _T("3DText")
41 
44 UINT uTimerID; // SetTimer Actual ID
45 #define APP_TIMER 1 // Graphics Update Timer ID
46 #define APP_TIMER_INTERVAL (USER_TIMER_MINIMUM * 5) // Graphics Update Interval
47 
48 // Build Our Bitmap Font
50 {
51  // Address Buffer For Font Storage
52  GLYPHMETRICSFLOAT gmf[256];
53  // Windows Font Handle
54  HFONT font;
55  size_t i;
56  TCHAR c;
57  GLfloat cellOriginX = 0.0f;
58  GLfloat stringOriginX;
59  GLfloat stringExtentX = 0.0f;
60  GLfloat stringExtentY = 0.0f;
61 
62  // Storage For 256 Characters
63  base = glGenLists(256);
64 
65  font = CreateFont(-12,
66  0, // Width Of Font
67  0, // Angle Of Escapement
68  0, // Orientation Angle
69  FW_BOLD, // Font Weight
70  FALSE, // Italic
71  FALSE, // Underline
72  FALSE, // Strikeout
73  DEFAULT_CHARSET, // Character Set Identifier
74  OUT_TT_PRECIS, // Output Precision
75  CLIP_DEFAULT_PRECIS, // Clipping Precision
76  ANTIALIASED_QUALITY, // Output Quality
77  FF_DONTCARE|DEFAULT_PITCH, // Family And Pitch
78  _T("Tahoma")); // Font Name
79 
80  // Selects The Font We Created
82 
83  wglUseFontOutlines(hDC, // Select The Current DC
84  0, // Starting Character
85  255, // Number Of Display Lists To Build
86  base, // Starting Display Lists
87  0.0f, // Deviation From The True Outlines
88  0.2f, // Font Thickness In The Z Direction
89  WGL_FONT_POLYGONS, // Use Polygons, Not Lines
90  gmf); // Address Of Buffer To Receive Data
91 
92  // Calculate the string extent
93  for (i = 0; i < _tcslen(m_Text); i++)
94  {
95  c = m_Text[i];
96 
97  stringOriginX = cellOriginX + gmf[c].gmfptGlyphOrigin.x;
98 
99  stringExtentX = stringOriginX + gmf[c].gmfBlackBoxX;
100  if (gmf[c].gmfBlackBoxY > stringExtentY)
101  stringExtentY = gmf[c].gmfBlackBoxY;
102 
103  cellOriginX = cellOriginX + gmf[c].gmfCellIncX;
104  }
105 
106  extentX = stringExtentX;
107  extentY = stringExtentY;
108 }
109 
110 // Delete The Font
112 {
113  // Delete all 256 characters
114  glDeleteLists(base, 256);
115 }
116 
117 // Custom GL "Print" Routine
119 {
120  // If there's no text, do nothing
121  if (text == NULL)
122  return;
123 
124  // Pushes The Display List Bits
126 
127  // Sets The Base Character to 32
128  glListBase(base);
129 
130  // Draws The Display List Text
132 #ifdef UNICODE
134 #else
136 #endif
137  text);
138 
139  // Pops The Display List Bits
140  glPopAttrib();
141 }
142 
143 // Will Be Called Right After The GL Window Is Created
145 {
146  // Clear The Background Color To Black
147  glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
148 
149  // Enables Clearing Of The Depth Buffer
150  glClearDepth(1.0);
151 
152  // The Type Of Depth Test To Do
154 
155  // Enables Depth Testing
157 
158  // Enables Smooth Color Shading
160 
161  // Select The Projection Matrix
163 
164  // Reset The Projection Matrix
165  glLoadIdentity();
166 
167  // Calculate The Aspect Ratio Of The Window
168  gluPerspective(45.0f, (GLfloat)Width / (GLfloat)Height, 0.1f, 100.0f);
169 
170  // Select The Modelview Matrix
172 
173  // Build The Font
174  BuildFont();
175 
176  // Enable Default Light (Quick And Dirty)
178 
179  // Enable Lighting
181 
182  // Enable Coloring Of Material
184 }
185 
186 // Handles Window Resizing
188 {
189  // Is Window Too Small (Divide By Zero Error)
190  if (Height == 0)
191  {
192  // If So Make It One Pixel Tall
193  Height = 1;
194  }
195 
196  // Reset The Current Viewport And Perspective Transformation
197  glViewport(0, 0, Width, Height);
198 
199  // Select The Projection Matrix
201 
202  // Reset The Projection Matrix
203  glLoadIdentity();
204 
205  // Calculate The Aspect Ratio Of The Window
206  gluPerspective(45.0f, (GLfloat)Width / (GLfloat)Height, 0.1f, 100.0f);
207 
208  // Select The Modelview Matrix
210 }
211 
212 // Handles Rendering
214 {
215  // Save ticks count of previous frame here
216  static DWORD dwTicks = 0;
217 
218  // Clear The Screen And The Depth Buffer
220 
221  // Reset The View
222  glLoadIdentity();
223 
224  // Move One Unit Into The Screen
225  glTranslatef(0.0f, 0.0f, -10.0f);
226 
227  // Rotate On The X Axis
228  glRotatef(rot, 1.0f, 0.0f, 0.0f);
229 
230  // Rotate On The Y Axis
231  glRotatef(rot * 1.2f, 0.0f, 1.0f, 0.0f);
232 
233  // Rotate On The Z Axis
234  glRotatef(rot * 1.4f, 0.0f, 0.0f, 1.0f);
235 
236  // Move to the Left and Down before drawing
237  glTranslatef(-(extentX / 2.0f),
238  -(extentY / 2.0f),
239  0.0f);
240 
241  // Pulsing Colors Based On The Rotation
242  glColor3f((1.0f * (GLfloat)(cos(rot / 20.0f))),
243  (1.0f * (GLfloat)(sin(rot / 25.0f))),
244  (1.0f - 0.5f * (GLfloat)(cos(rot / 17.0f))));
245 
246  // Print GL Text To The Screen
247  glPrint(m_Text);
248 
249  // Make The Text Blue
250  glColor3f(0.0f, 0.0f, 1.0f);
251 
252  // Increase The Rotation Variable
253  if(dwTicks)
254  rot += (GetTickCount() - dwTicks) / 20.0f;
255  dwTicks = GetTickCount();
256 }
257 
260 {
261  RECT Screen; // Used Later On To Get The Size Of The Window
262  GLuint PixelFormat; // Pixel Format Storage
263  static PIXELFORMATDESCRIPTOR pfd= // Pixel Format Descriptor
264  {
265  sizeof(PIXELFORMATDESCRIPTOR), // Size Of This Pixel Format Descriptor
266  1, // Version Number (?)
267  PFD_DRAW_TO_WINDOW | // Format Must Support Window
268  PFD_SUPPORT_OPENGL | // Format Must Support OpenGL
269  PFD_DOUBLEBUFFER, // Must Support Double Buffering
270  PFD_TYPE_RGBA, // Request An RGBA Format
271  16, // Select A 16Bit Color Depth
272  0, 0, 0, 0, 0, 0, // Color Bits Ignored (?)
273  0, // No Alpha Buffer
274  0, // Shift Bit Ignored (?)
275  0, // No Accumulation Buffer
276  0, 0, 0, 0, // Accumulation Bits Ignored (?)
277  16, // 16Bit Z-Buffer (Depth Buffer)
278  0, // No Stencil Buffer
279  0, // No Auxiliary Buffer (?)
280  PFD_MAIN_PLANE, // Main Drawing Layer
281  0, // Reserved (?)
282  0, 0, 0 // Layer Masks Ignored (?)
283  };
284 
285  switch (message)
286  {
287  case WM_CREATE:
288  LoadSettings();
289 
290  // Gets A Device Context For The Window
291  hDC = GetDC(hWnd);
292 
293  // Finds The Closest Match To The Pixel Format We Set Above
295 
296  // No Matching Pixel Format?
297  if (!PixelFormat)
298  {
299  MessageBox(0, _TEXT("Can't Find A Suitable PixelFormat."), _TEXT("Error"),MB_OK | MB_ICONERROR);
300 
301  // This Sends A 'Message' Telling The Program To Quit
302  PostQuitMessage(0);
303  break;
304  }
305 
306  // Can We Set The Pixel Mode?
308  {
309  MessageBox(0, _TEXT("Can't Set The PixelFormat."), _TEXT("Error"), MB_OK | MB_ICONERROR);
310 
311  // This Sends A 'Message' Telling The Program To Quit
312  PostQuitMessage(0);
313  break;
314  }
315 
316  // Grab A Rendering Context
318 
319  // Did We Get One?
320  if (!hRC)
321  {
322  MessageBox(0, _TEXT("Can't Create A GL Rendering Context."), _TEXT("Error"), MB_OK | MB_ICONERROR);
323 
324  // This Sends A 'Message' Telling The Program To Quit
325  PostQuitMessage(0);
326  break;
327  }
328 
329  // Can We Make The RC Active?
330  if (!wglMakeCurrent(hDC, hRC))
331  {
332  MessageBox(0, _TEXT("Can't Activate GLRC."), _TEXT("Error"), MB_OK | MB_ICONERROR);
333 
334  // This Sends A 'Message' Telling The Program To Quit
335  PostQuitMessage(0);
336  break;
337  }
338 
339  // Grab Screen Info For The Current Window
341 
342  // Initialize The GL Screen Using Screen Info
343  InitGL(Screen.right, Screen.bottom);
344 
345  // Create Graphics update timer
347  break;
348 
349  case WM_DESTROY:
350  // Disable Fullscreen Mode
351  ChangeDisplaySettings(NULL, 0);
352 
353  // Delete the Update Timer
355 
356  // Deletes The Font Display List
357  KillFont();
358 
359  // Make The DC Current
361 
362  // Kill The RC
364 
365  // Free The DC
366  ReleaseDC(hWnd, hDC);
367  break;
368 
369  case WM_PAINT:
370  DrawGLScene();
371  SwapBuffers(hDC);
372  // Mark this window as updated, so the OS won't ask us to update it again.
374  break;
375 
376  case WM_SIZE: // Resizing The Screen
377  // Resize To The New Window Size
379  break;
380 
381  case WM_TIMER:
382  // Used to update graphic based on timer udpate interval
384  break;
385 
386  default:
387  // Pass Windows Messages to the default screensaver window procedure
389  }
390 
391  return 0;
392 }
393 
394 //
395 // Dialogbox procedure for Configuration window
396 //
398 {
399  switch (uMsg)
400  {
401  case WM_INITDIALOG:
402  LoadSettings();
404  return TRUE;
405 
406  case WM_COMMAND:
407  switch (LOWORD(wParam))
408  {
409  case IDOK:
411  SaveSettings();
412 
413  /* Fall through */
414 
415  case IDCANCEL:
416  EndDialog(hDlg, IDCANCEL);
417  break;
418  }
419  return FALSE;
420 
421  case WM_CLOSE:
422  EndDialog(hDlg, 0);
423  break;
424 
425  default:
426  return FALSE;
427  }
428 
429  return TRUE;
430 }
431 
433 {
434  return TRUE;
435 }
static HGLRC hRC
Definition: 3dtext.c:32
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Definition: gl.h:180
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Definition: gl.h:716
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Definition: 3dtext.c:44
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GLsizei GLenum const GLvoid GLsizei GLenum GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLint GLint GLint GLshort GLshort GLshort GLubyte GLubyte GLubyte GLuint GLuint GLuint GLushort GLushort GLushort GLbyte GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLfloat GLint GLint GLint GLint GLshort GLshort GLshort GLshort GLubyte GLubyte GLubyte GLubyte GLuint GLuint GLuint GLuint GLushort GLushort GLushort GLushort GLboolean const GLdouble const GLfloat const GLint const GLshort const GLbyte const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLdouble const GLfloat const GLfloat const GLint const GLint const GLshort const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort GLenum GLenum GLenum GLfloat GLenum GLint GLenum GLenum GLenum GLfloat GLenum GLenum GLint GLenum GLfloat GLenum GLint GLint GLushort GLenum GLenum GLfloat GLenum GLenum GLint GLfloat const GLubyte GLenum GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLint GLint GLsizei GLsizei GLint GLenum GLenum const GLvoid GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLenum const GLdouble GLenum GLenum const GLfloat GLenum GLenum const GLint GLsizei GLuint GLfloat GLuint GLbitfield GLfloat GLint GLuint GLboolean GLenum GLfloat GLenum GLbitfield GLenum GLfloat GLfloat GLint GLint const GLfloat GLenum GLfloat GLfloat GLint GLint GLfloat GLfloat GLint GLint const GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat const GLdouble const GLfloat const GLdouble const GLfloat GLint i
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