ReactOS  0.4.14-dev-114-gc8cbd56
3dtext.c
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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 
45 // Build Our Bitmap Font
47 {
48  // Address Buffer For Font Storage
49  GLYPHMETRICSFLOAT gmf[256];
50  // Windows Font Handle
51  HFONT font;
52  size_t i;
53  TCHAR c;
54  GLfloat cellOriginX = 0.0f;
55  GLfloat stringOriginX;
56  GLfloat stringExtentX = 0.0f;
57  GLfloat stringExtentY = 0.0f;
58 
59  // Storage For 256 Characters
60  base = glGenLists(256);
61 
62  font = CreateFont(-12,
63  0, // Width Of Font
64  0, // Angle Of Escapement
65  0, // Orientation Angle
66  FW_BOLD, // Font Weight
67  FALSE, // Italic
68  FALSE, // Underline
69  FALSE, // Strikeout
70  DEFAULT_CHARSET, // Character Set Identifier
71  OUT_TT_PRECIS, // Output Precision
72  CLIP_DEFAULT_PRECIS, // Clipping Precision
73  ANTIALIASED_QUALITY, // Output Quality
74  FF_DONTCARE|DEFAULT_PITCH, // Family And Pitch
75  _T("Tahoma")); // Font Name
76 
77  // Selects The Font We Created
79 
80  wglUseFontOutlines(hDC, // Select The Current DC
81  0, // Starting Character
82  255, // Number Of Display Lists To Build
83  base, // Starting Display Lists
84  0.0f, // Deviation From The True Outlines
85  0.2f, // Font Thickness In The Z Direction
86  WGL_FONT_POLYGONS, // Use Polygons, Not Lines
87  gmf); // Address Of Buffer To Receive Data
88 
89  // Calculate the string extent
90  for (i = 0; i < _tcslen(m_Text); i++)
91  {
92  c = m_Text[i];
93 
94  stringOriginX = cellOriginX + gmf[c].gmfptGlyphOrigin.x;
95 
96  stringExtentX = stringOriginX + gmf[c].gmfBlackBoxX;
97  if (gmf[c].gmfBlackBoxY > stringExtentY)
98  stringExtentY = gmf[c].gmfBlackBoxY;
99 
100  cellOriginX = cellOriginX + gmf[c].gmfCellIncX;
101  }
102 
103  extentX = stringExtentX;
104  extentY = stringExtentY;
105 }
106 
107 // Delete The Font
109 {
110  // Delete all 256 characters
111  glDeleteLists(base, 256);
112 }
113 
114 // Custom GL "Print" Routine
116 {
117  // If there's no text, do nothing
118  if (text == NULL)
119  return;
120 
121  // Pushes The Display List Bits
123 
124  // Sets The Base Character to 32
125  glListBase(base);
126 
127  // Draws The Display List Text
129 #ifdef UNICODE
131 #else
133 #endif
134  text);
135 
136  // Pops The Display List Bits
137  glPopAttrib();
138 }
139 
140 // Will Be Called Right After The GL Window Is Created
141 GLvoid InitGL(GLsizei Width, GLsizei Height)
142 {
143  // Clear The Background Color To Black
144  glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
145 
146  // Enables Clearing Of The Depth Buffer
147  glClearDepth(1.0);
148 
149  // The Type Of Depth Test To Do
151 
152  // Enables Depth Testing
154 
155  // Enables Smooth Color Shading
157 
158  // Select The Projection Matrix
160 
161  // Reset The Projection Matrix
162  glLoadIdentity();
163 
164  // Calculate The Aspect Ratio Of The Window
165  gluPerspective(45.0f, (GLfloat)Width / (GLfloat)Height, 0.1f, 100.0f);
166 
167  // Select The Modelview Matrix
169 
170  // Build The Font
171  BuildFont();
172 
173  // Enable Default Light (Quick And Dirty)
175 
176  // Enable Lighting
178 
179  // Enable Coloring Of Material
181 }
182 
183 // Handles Window Resizing
185 {
186  // Is Window Too Small (Divide By Zero Error)
187  if (Height == 0)
188  {
189  // If So Make It One Pixel Tall
190  Height = 1;
191  }
192 
193  // Reset The Current Viewport And Perspective Transformation
194  glViewport(0, 0, Width, Height);
195 
196  // Select The Projection Matrix
198 
199  // Reset The Projection Matrix
200  glLoadIdentity();
201 
202  // Calculate The Aspect Ratio Of The Window
203  gluPerspective(45.0f, (GLfloat)Width / (GLfloat)Height, 0.1f, 100.0f);
204 
205  // Select The Modelview Matrix
207 }
208 
209 // Handles Rendering
211 {
212  // Save ticks count of previous frame here
213  static DWORD dwTicks = 0;
214 
215  // Clear The Screen And The Depth Buffer
217 
218  // Reset The View
219  glLoadIdentity();
220 
221  // Move One Unit Into The Screen
222  glTranslatef(0.0f, 0.0f, -10.0f);
223 
224  // Rotate On The X Axis
225  glRotatef(rot, 1.0f, 0.0f, 0.0f);
226 
227  // Rotate On The Y Axis
228  glRotatef(rot * 1.2f, 0.0f, 1.0f, 0.0f);
229 
230  // Rotate On The Z Axis
231  glRotatef(rot * 1.4f, 0.0f, 0.0f, 1.0f);
232 
233  // Move to the Left and Down before drawing
234  glTranslatef(-(extentX / 2.0f),
235  -(extentY / 2.0f),
236  0.0f);
237 
238  // Pulsing Colors Based On The Rotation
239  glColor3f((1.0f * (GLfloat)(cos(rot / 20.0f))),
240  (1.0f * (GLfloat)(sin(rot / 25.0f))),
241  (1.0f - 0.5f * (GLfloat)(cos(rot / 17.0f))));
242 
243  // Print GL Text To The Screen
244  glPrint(m_Text);
245 
246  // Make The Text Blue
247  glColor3f(0.0f, 0.0f, 1.0f);
248 
249  // Increase The Rotation Variable
250  if(dwTicks)
251  rot += (GetTickCount() - dwTicks) / 20.0f;
252  dwTicks = GetTickCount();
253 }
254 
257 {
258  RECT Screen; // Used Later On To Get The Size Of The Window
259  GLuint PixelFormat; // Pixel Format Storage
260  static PIXELFORMATDESCRIPTOR pfd= // Pixel Format Descriptor
261  {
262  sizeof(PIXELFORMATDESCRIPTOR), // Size Of This Pixel Format Descriptor
263  1, // Version Number (?)
264  PFD_DRAW_TO_WINDOW | // Format Must Support Window
265  PFD_SUPPORT_OPENGL | // Format Must Support OpenGL
266  PFD_DOUBLEBUFFER, // Must Support Double Buffering
267  PFD_TYPE_RGBA, // Request An RGBA Format
268  16, // Select A 16Bit Color Depth
269  0, 0, 0, 0, 0, 0, // Color Bits Ignored (?)
270  0, // No Alpha Buffer
271  0, // Shift Bit Ignored (?)
272  0, // No Accumulation Buffer
273  0, 0, 0, 0, // Accumulation Bits Ignored (?)
274  16, // 16Bit Z-Buffer (Depth Buffer)
275  0, // No Stencil Buffer
276  0, // No Auxiliary Buffer (?)
277  PFD_MAIN_PLANE, // Main Drawing Layer
278  0, // Reserved (?)
279  0, 0, 0 // Layer Masks Ignored (?)
280  };
281 
282  switch (message)
283  {
284  case WM_CREATE:
285  LoadSettings();
286 
287  // Gets A Device Context For The Window
288  hDC = GetDC(hWnd);
289 
290  // Finds The Closest Match To The Pixel Format We Set Above
292 
293  // No Matching Pixel Format?
294  if (!PixelFormat)
295  {
296  MessageBox(0, _TEXT("Can't Find A Suitable PixelFormat."), _TEXT("Error"),MB_OK | MB_ICONERROR);
297 
298  // This Sends A 'Message' Telling The Program To Quit
299  PostQuitMessage(0);
300  break;
301  }
302 
303  // Can We Set The Pixel Mode?
305  {
306  MessageBox(0, _TEXT("Can't Set The PixelFormat."), _TEXT("Error"), MB_OK | MB_ICONERROR);
307 
308  // This Sends A 'Message' Telling The Program To Quit
309  PostQuitMessage(0);
310  break;
311  }
312 
313  // Grab A Rendering Context
315 
316  // Did We Get One?
317  if (!hRC)
318  {
319  MessageBox(0, _TEXT("Can't Create A GL Rendering Context."), _TEXT("Error"), MB_OK | MB_ICONERROR);
320 
321  // This Sends A 'Message' Telling The Program To Quit
322  PostQuitMessage(0);
323  break;
324  }
325 
326  // Can We Make The RC Active?
327  if (!wglMakeCurrent(hDC, hRC))
328  {
329  MessageBox(0, _TEXT("Can't Activate GLRC."), _TEXT("Error"), MB_OK | MB_ICONERROR);
330 
331  // This Sends A 'Message' Telling The Program To Quit
332  PostQuitMessage(0);
333  break;
334  }
335 
336  // Grab Screen Info For The Current Window
338 
339  // Initialize The GL Screen Using Screen Info
340  InitGL(Screen.right, Screen.bottom);
341  break;
342 
343  case WM_DESTROY:
344  // Disable Fullscreen Mode
345  ChangeDisplaySettings(NULL, 0);
346 
347  // Deletes The Font Display List
348  KillFont();
349 
350  // Make The DC Current
352 
353  // Kill The RC
355 
356  // Free The DC
357  ReleaseDC(hWnd, hDC);
358  break;
359 
360  case WM_PAINT:
361  DrawGLScene();
362  SwapBuffers(hDC);
363  break;
364 
365  case WM_SIZE: // Resizing The Screen
366  // Resize To The New Window Size
368  break;
369 
370  default:
371  // Pass Windows Messages to the default screensaver window procedure
373  }
374 
375  return 0;
376 }
377 
378 //
379 // Dialogbox procedure for Configuration window
380 //
382 {
383  switch (uMsg)
384  {
385  case WM_INITDIALOG:
386  LoadSettings();
388  return TRUE;
389 
390  case WM_COMMAND:
391  switch (LOWORD(wParam))
392  {
393  case IDOK:
395  SaveSettings();
396 
397  /* Fall through */
398 
399  case IDCANCEL:
400  EndDialog(hDlg, IDCANCEL);
401  break;
402  }
403  return FALSE;
404 
405  case WM_CLOSE:
406  EndDialog(hDlg, 0);
407  break;
408 
409  default:
410  return FALSE;
411  }
412 
413  return TRUE;
414 }
415 
417 {
418  return TRUE;
419 }
static HGLRC hRC
Definition: 3dtext.c:32
#define GL_UNSIGNED_SHORT
Definition: gl.h:180
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Definition: gl.h:716
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Definition: 3dtext.c:210
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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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