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This thread is locked; no one can reply to it.
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| Translucent Allegro Windows |
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Edgar Reynaldo
Major Reynaldo
May 2007
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It's time to join the future. Allegro needs custom OpenGL contexts and translucent windows. SDL has it, why not us? So, I'm starting a project to get it done. Step 1) Create a basic working example on every platform without using allegro. OpenGL and system calls only. Step 2) Integrate custom OpenGL context creation into Allegro. 1a) Win32 and WGL 1b) X11, XLib, and XGL 1c) OSX, OpenGL I'll start working on 1a. A Win32 example with WGL. If anyone can tackle 1b or 1c, we'll get this done in no time. This is something I have wanted to do for a long time, and I'm going to get it done if it kills me. Edgar My Website! | EAGLE GUI Library Demos | My Deviant Art Gallery | Spiraloid Preview | A4 FontMaker | Skyline! (Missile Defense) Eagle and Allegro 5 binaries | Older Allegro 4 and 5 binaries | Allegro 5 compile guide |
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GullRaDriel
Member #3,861
September 2003
 |
Good idea. I'm not fluent enough in OpenGL to help you, but I can make some tests if needed (Windows/Linux/Android) "Code is like shit - it only smells if it is not yours" |
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Edgar Reynaldo
Major Reynaldo
May 2007
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Well, I've got a win32 OpenGL solution 'mostly' working. It's translucent, but for some reason, it's like it's over gray at 1/2 alpha and I can't explain why. https://github.com/EdgarReynaldo/TransAllegro {"name":"Trans3.png","src":"\/\/djungxnpq2nug.cloudfront.net\/image\/cache\/3\/6\/36fa9553a11faa418c6300affd33af6b.png","w":1920,"h":1080,"tn":"\/\/djungxnpq2nug.cloudfront.net\/image\/cache\/3\/6\/36fa9553a11faa418c6300affd33af6b"} My Website! | EAGLE GUI Library Demos | My Deviant Art Gallery | Spiraloid Preview | A4 FontMaker | Skyline! (Missile Defense) Eagle and Allegro 5 binaries | Older Allegro 4 and 5 binaries | Allegro 5 compile guide |
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MikiZX
Member #17,092
June 2019
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This is definitely way over my skill level and a good addition to Allegro. |
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Edgar Reynaldo
Major Reynaldo
May 2007
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In all actuality, once you get past all the misinformation and crap on the internet, it's actually quite easy. Working win32 demo. Try it! My Website! | EAGLE GUI Library Demos | My Deviant Art Gallery | Spiraloid Preview | A4 FontMaker | Skyline! (Missile Defense) Eagle and Allegro 5 binaries | Older Allegro 4 and 5 binaries | Allegro 5 compile guide |
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MikiZX
Member #17,092
June 2019
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Sorry to report... I get a blank black rectangle in top-left corner of the screen. EDIT: not sure if this helps: 1display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:732 get_available_pixel_formats_ext [ 5.87641] --
2display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:733 get_available_pixel_formats_ext [ 5.87644] Decoding visual no. 98...
3display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:306 decode_pixel_format_attrib [ 5.93237] Decoding:
4display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:210 display_pixel_format [ 5.93243] Accelerated: no
5display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:211 display_pixel_format [ 5.93247] Single-buffer: no
6display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:213 display_pixel_format [ 5.93250] Swap method: copy
7display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:216 display_pixel_format [ 5.93253] Color format: r8 g8 b8 a8, 32 bit
8display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:222 display_pixel_format [ 5.93256] Depth buffer: 16 bits
9display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:223 display_pixel_format [ 5.93260] Sample buffers: no
10display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:224 display_pixel_format [ 5.93263] Samples: 0
11display D E:\LIBS\LIBS81Rebuild\A5FORK\src\display_settings.c:212 debug_display_settings [ 5.93266] color: 32 (rgba 8888), depth: 16, stencil: 8, acc: 16161616, samples: 0/0
12display D E:\LIBS\LIBS81Rebuild\A5FORK\src\display_settings.c:527 _al_score_display_settings [ 5.93269] Score is : 1025
13display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:732 get_available_pixel_formats_ext [ 5.93272] --
14display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:733 get_available_pixel_formats_ext [ 5.93275] Decoding visual no. 99...
15display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:306 decode_pixel_format_attrib [ 5.98865] Decoding:
16display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:326 decode_pixel_format_attrib [ 5.98873] Not RGBA mode
17display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:732 get_available_pixel_formats_ext [ 5.98876] --
18display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:733 get_available_pixel_formats_ext [ 5.98879] Decoding visual no. 100...
19display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:306 decode_pixel_format_attrib [ 6.04412] Decoding:
20display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:326 decode_pixel_format_attrib [ 6.04418] Not RGBA mode
21display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:732 get_available_pixel_formats_ext [ 6.04421] --
22display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:733 get_available_pixel_formats_ext [ 6.04424] Decoding visual no. 101...
23display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:306 decode_pixel_format_attrib [ 6.09996] Decoding:
24display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:326 decode_pixel_format_attrib [ 6.10003] Not RGBA mode
25display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:732 get_available_pixel_formats_ext [ 6.10006] --
26display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:733 get_available_pixel_formats_ext [ 6.10009] Decoding visual no. 102...
27display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:306 decode_pixel_format_attrib [ 6.15576] Decoding:
28display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:326 decode_pixel_format_attrib [ 6.15582] Not RGBA mode
29display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:732 get_available_pixel_formats_ext [ 6.15585] --
30display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:733 get_available_pixel_formats_ext [ 6.15588] Decoding visual no. 103...
31display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:306 decode_pixel_format_attrib [ 6.21173] Decoding:
32display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:321 decode_pixel_format_attrib [ 6.21180] Can't draw to window
33display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:732 get_available_pixel_formats_ext [ 6.21184] --
34display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:733 get_available_pixel_formats_ext [ 6.21187] Decoding visual no. 104...
35display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:306 decode_pixel_format_attrib [ 6.26753] Decoding:
36display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:321 decode_pixel_format_attrib [ 6.26760] Can't draw to window
37display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:732 get_available_pixel_formats_ext [ 6.26764] --
38display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:733 get_available_pixel_formats_ext [ 6.26767] Decoding visual no. 105...
39display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:306 decode_pixel_format_attrib [ 6.32312] Decoding:
40display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:321 decode_pixel_format_attrib [ 6.32321] Can't draw to window
41display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:732 get_available_pixel_formats_ext [ 6.32324] --
42display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:733 get_available_pixel_formats_ext [ 6.32327] Decoding visual no. 106...
43display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:306 decode_pixel_format_attrib [ 6.37919] Decoding:
44display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:321 decode_pixel_format_attrib [ 6.37927] Can't draw to window
45display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:732 get_available_pixel_formats_ext [ 6.37930] --
46display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:733 get_available_pixel_formats_ext [ 6.37933] Decoding visual no. 107...
47display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:306 decode_pixel_format_attrib [ 6.43517] Decoding:
48display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:321 decode_pixel_format_attrib [ 6.43524] Can't draw to window
49display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:732 get_available_pixel_formats_ext [ 6.43528] --
50display I E:\LIBS\LIBS81Rebuild\A5FORK\src\win\wgl_disp.c:733 get_available_pixel_formats_ext [ 6.43531] Decoding visual no. 108...
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Edgar Reynaldo
Major Reynaldo
May 2007
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What version of Windows are you using? Is your desktop 32 bit color depth? I'm on IRC on #allegro right now. Meet me there. Allegro.cc is being sketchy. My Website! | EAGLE GUI Library Demos | My Deviant Art Gallery | Spiraloid Preview | A4 FontMaker | Skyline! (Missile Defense) Eagle and Allegro 5 binaries | Older Allegro 4 and 5 binaries | Allegro 5 compile guide |
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MikiZX
Member #17,092
June 2019
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Windows 10, 32 bit. |
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Edgar Reynaldo
Major Reynaldo
May 2007
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Is translucency enabled in your desktop? My Website! | EAGLE GUI Library Demos | My Deviant Art Gallery | Spiraloid Preview | A4 FontMaker | Skyline! (Missile Defense) Eagle and Allegro 5 binaries | Older Allegro 4 and 5 binaries | Allegro 5 compile guide |
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MikiZX
Member #17,092
June 2019
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log |
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Edgar Reynaldo
Major Reynaldo
May 2007
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Since the first demo doesn't work for you, try this one : https://www.allegro.cc/files/attachment/612221 The first one uses a hacked Allegro. This one is straight win32 and OpenGL, with a little help from datenwolf. My Website! | EAGLE GUI Library Demos | My Deviant Art Gallery | Spiraloid Preview | A4 FontMaker | Skyline! (Missile Defense) Eagle and Allegro 5 binaries | Older Allegro 4 and 5 binaries | Allegro 5 compile guide |
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MikiZX
Member #17,092
June 2019
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Both work - I just needed a little patience for the bitmaps to load. |
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Edgar Reynaldo
Major Reynaldo
May 2007
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All source code for the stand alone win32 opengl demo can be found here : https://github.com/EdgarReynaldo/TransAllegro/tree/master/src/win Note it borrows some helper functions from datenwolf and his wglarb demo, which can be found here : https://github.com/datenwolf/wglarb The gist of it is really simple. 1) Register a window class. The class style can be 0 or CS_OWNDC or perhaps others (not tested). 2) Create a window with CreateWindowEx, specifying WS_EX_APPWINDOW for the extended style and WS_POPUP for the style. 3) Create an OpenGL context that has 32 bit color, 8 bit alpha, and the WGL_TRANSPARENT_ARB extension enabled. 4) Use DWM to blur the window. DwmEnableBlurBehindWindow and DwmExtendFrameIntoClientArea are necessary to set up the window correctly so that the client area is NOT blurred (only non-blurred regions are drawn using alpha values [ yes this is as backwards as your reflection in the mirror ]). DWM_BLURBEHIND bb = {0,0,0,0}; bb.dwFlags = DWM_BB_ENABLE; bb.fEnable = TRUE; bb.hRgnBlur = NULL; HRESULT hr = DwmEnableBlurBehindWindow(hwnd, &bb); if (FAILED(hr)) { printf("Could not enable blur behind."); } MARGINS margins = {-1}; DwmExtendFrameIntoClientArea(hwnd, &margins); 5) Draw with OpenGL and enjoy. UPDATE : 1/*------------------------------------------------------------------------
2 * A demonstration of OpenGL in a ARGB window
3 * => support for composited window transparency
4 *
5 * (c) 2011 by Wolfgang 'datenwolf' Draxinger
6 * See me at comp.graphics.api.opengl and StackOverflow.com
7
8 * License agreement: This source code is provided "as is". You
9 * can use this source code however you want for your own personal
10 * use. If you give this source code to anybody else then you must
11 * leave this message in it.
12 *
13 * This program is based on the simplest possible
14 * Linux OpenGL program by FTB (see info below)
15
16 The simplest possible Linux OpenGL program? Maybe...
17
18 (c) 2002 by FTB. See me in comp.graphics.api.opengl
19
20 --
21 <___/>
22 / O O \
23 _____/ FTB.
24
25------------------------------------------------------------------------*/
26
27#include <stdlib.h>
28#include <stdio.h>
29#include <string.h>
30#include <math.h>
31
32#include <GL/gl.h>
33#include <GL/glx.h>
34#include <GL/glxext.h>
35#include <X11/Xatom.h>
36#include <X11/extensions/Xrender.h>
37#include <X11/Xutil.h>
38
39#define USE_CHOOSE_FBCONFIG
40
41static void fatalError(const char *why)
42{
43 fprintf(stderr, "%s", why);
44 exit(0x666);
45}
46
47static int Xscreen;
48static Atom del_atom;
49static Colormap cmap;
50static Display *Xdisplay;
51static XVisualInfo *visual;
52static XRenderPictFormat *pict_format;
53static GLXFBConfig *fbconfigs, fbconfig;
54static int numfbconfigs;
55static GLXContext render_context;
56static Window Xroot, window_handle;
57static GLXWindow glX_window_handle;
58static int width, height;
59
60static int VisData[] = {
61GLX_RENDER_TYPE, GLX_RGBA_BIT,
62GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT,
63GLX_DOUBLEBUFFER, True,
64GLX_RED_SIZE, 8,
65GLX_GREEN_SIZE, 8,
66GLX_BLUE_SIZE, 8,
67GLX_ALPHA_SIZE, 8,
68GLX_DEPTH_SIZE, 16,
69None
70};
71
72static int isExtensionSupported(const char *extList, const char *extension)
73{
74
75 const char *start;
76 const char *where, *terminator;
77
78 /* Extension names should not have spaces. */
79 where = strchr(extension, ' ');
80 if ( where || *extension == '\0' )
81 return 0;
82
83 /* It takes a bit of care to be fool-proof about parsing the
84 OpenGL extensions string. Don't be fooled by sub-strings,
85 etc. */
86 for ( start = extList; ; ) {
87 where = strstr( start, extension );
88
89 if ( !where )
90 break;
91
92 terminator = where + strlen( extension );
93
94 if ( where == start || *(where - 1) == ' ' )
95 if ( *terminator == ' ' || *terminator == '\0' )
96 return 1;
97
98 start = terminator;
99 }
100 return 0;
101}
102
103static Bool WaitForMapNotify(Display *d, XEvent *e, char *arg)
104{
105 return d && e && arg && (e->type == MapNotify) && (e->xmap.window == *(Window*)arg);
106}
107
108static void describe_fbconfig(GLXFBConfig fbconfig)
109{
110 int doublebuffer;
111 int red_bits, green_bits, blue_bits, alpha_bits, depth_bits;
112
113 glXGetFBConfigAttrib(Xdisplay, fbconfig, GLX_DOUBLEBUFFER, &doublebuffer);
114 glXGetFBConfigAttrib(Xdisplay, fbconfig, GLX_RED_SIZE, &red_bits);
115 glXGetFBConfigAttrib(Xdisplay, fbconfig, GLX_GREEN_SIZE, &green_bits);
116 glXGetFBConfigAttrib(Xdisplay, fbconfig, GLX_BLUE_SIZE, &blue_bits);
117 glXGetFBConfigAttrib(Xdisplay, fbconfig, GLX_ALPHA_SIZE, &alpha_bits);
118 glXGetFBConfigAttrib(Xdisplay, fbconfig, GLX_DEPTH_SIZE, &depth_bits);
119
120 fprintf(stderr, "FBConfig selected:\n"
121 "Doublebuffer: %s\n"
122 "Red Bits: %d, Green Bits: %d, Blue Bits: %d, Alpha Bits: %d, Depth Bits: %d\n",
123 doublebuffer == True ? "Yes" : "No",
124 red_bits, green_bits, blue_bits, alpha_bits, depth_bits);
125}
126
127static void createTheWindow()
128{
129 XEvent event;
130 int x,y, attr_mask;
131 XSizeHints hints;
132 XWMHints *startup_state;
133 XTextProperty textprop;
134 XSetWindowAttributes attr = {0,};
135 static const char *title = "FTB's little OpenGL example - ARGB extension by WXD";
136
137 Xdisplay = XOpenDisplay(NULL);
138 if (!Xdisplay) {
139 fatalError("Couldn't connect to X server\n");
140 }
141 Xscreen = DefaultScreen(Xdisplay);
142 Xroot = RootWindow(Xdisplay, Xscreen);
143
144 fbconfigs = glXChooseFBConfig(Xdisplay, Xscreen, VisData, &numfbconfigs);
145 fbconfig = 0;
146 for(int i = 0; i<numfbconfigs; i++) {
147 visual = (XVisualInfo*) glXGetVisualFromFBConfig(Xdisplay, fbconfigs[i]);
148 if(!visual)
149 continue;
150
151 pict_format = XRenderFindVisualFormat(Xdisplay, visual->visual);
152 if(!pict_format)
153 continue;
154
155 fbconfig = fbconfigs[i];
156 if(pict_format->direct.alphaMask > 0) {
157 break;
158 }
159 }
160
161 if(!fbconfig) {
162 fatalError("No matching FB config found");
163 }
164
165 describe_fbconfig(fbconfig);
166
167 /* Create a colormap - only needed on some X clients, eg. IRIX */
168 cmap = XCreateColormap(Xdisplay, Xroot, visual->visual, AllocNone);
169
170 attr.colormap = cmap;
171 attr.background_pixmap = None;
172 attr.border_pixmap = None;
173 attr.border_pixel = 0;
174 attr.event_mask =
175 StructureNotifyMask |
176 EnterWindowMask |
177 LeaveWindowMask |
178 ExposureMask |
179 ButtonPressMask |
180 ButtonReleaseMask |
181 OwnerGrabButtonMask |
182 KeyPressMask |
183 KeyReleaseMask;
184
185 attr_mask =
186 CWBackPixmap|
187 CWColormap|
188 CWBorderPixel|
189 CWEventMask;
190
191 width = DisplayWidth(Xdisplay, DefaultScreen(Xdisplay))/2;
192 height = DisplayHeight(Xdisplay, DefaultScreen(Xdisplay))/2;
193 x=width/2, y=height/2;
194
195 window_handle = XCreateWindow( Xdisplay,
196 Xroot,
197 x, y, width, height,
198 0,
199 visual->depth,
200 InputOutput,
201 visual->visual,
202 attr_mask, &attr);
203
204 if( !window_handle ) {
205 fatalError("Couldn't create the window\n");
206 }
207
208#if USE_GLX_CREATE_WINDOW
209 int glXattr[] = { None };
210 glX_window_handle = glXCreateWindow(Xdisplay, fbconfig, window_handle, glXattr);
211 if( !glX_window_handle ) {
212 fatalError("Couldn't create the GLX window\n");
213 }
214#else
215 glX_window_handle = window_handle;
216#endif
217
218 textprop.value = (unsigned char*)title;
219 textprop.encoding = XA_STRING;
220 textprop.format = 8;
221 textprop.nitems = strlen(title);
222
223 hints.x = x;
224 hints.y = y;
225 hints.width = width;
226 hints.height = height;
227 hints.flags = USPosition|USSize;
228
229 startup_state = XAllocWMHints();
230 startup_state->initial_state = NormalState;
231 startup_state->flags = StateHint;
232
233 XSetWMProperties(Xdisplay, window_handle,&textprop, &textprop,
234 NULL, 0,
235 &hints,
236 startup_state,
237 NULL);
238
239 XFree(startup_state);
240
241 XMapWindow(Xdisplay, window_handle);
242 XIfEvent(Xdisplay, &event, WaitForMapNotify, (char*)&window_handle);
243
244 if ((del_atom = XInternAtom(Xdisplay, "WM_DELETE_WINDOW", 0)) != None) {
245 XSetWMProtocols(Xdisplay, window_handle, &del_atom, 1);
246 }
247}
248
249static int ctxErrorHandler( Display *dpy, XErrorEvent *ev )
250{
251 fputs("Error at context creation", stderr);
252 return 0;
253}
254
255static void createTheRenderContext()
256{
257 int dummy;
258 if (!glXQueryExtension(Xdisplay, &dummy, &dummy)) {
259 fatalError("OpenGL not supported by X server\n");
260 }
261
262#if USE_GLX_CREATE_CONTEXT_ATTRIB
263 #define GLX_CONTEXT_MAJOR_VERSION_ARB 0x2091
264 #define GLX_CONTEXT_MINOR_VERSION_ARB 0x2092
265 render_context = NULL;
266 if( isExtensionSupported( glXQueryExtensionsString(Xdisplay, DefaultScreen(Xdisplay)), "GLX_ARB_create_context" ) ) {
267 typedef GLXContext (*glXCreateContextAttribsARBProc)(Display*, GLXFBConfig, GLXContext, Bool, const int*);
268 glXCreateContextAttribsARBProc glXCreateContextAttribsARB = (glXCreateContextAttribsARBProc)glXGetProcAddressARB( (const GLubyte *) "glXCreateContextAttribsARB" );
269 if( glXCreateContextAttribsARB ) {
270 int context_attribs[] =
271 {
272 GLX_CONTEXT_MAJOR_VERSION_ARB, 3,
273 GLX_CONTEXT_MINOR_VERSION_ARB, 0,
274 //GLX_CONTEXT_FLAGS_ARB , GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB,
275 None
276 };
277
278 int (*oldHandler)(Display*, XErrorEvent*) = XSetErrorHandler(&ctxErrorHandler);
279
280 render_context = glXCreateContextAttribsARB( Xdisplay, fbconfig, 0, True, context_attribs );
281
282 XSync( Xdisplay, False );
283 XSetErrorHandler( oldHandler );
284
285 fputs("glXCreateContextAttribsARB failed", stderr);
286 } else {
287 fputs("glXCreateContextAttribsARB could not be retrieved", stderr);
288 }
289 } else {
290 fputs("glXCreateContextAttribsARB not supported", stderr);
291 }
292
293 if(!render_context)
294 {
295#else
296 {
297#endif
298 render_context = glXCreateNewContext(Xdisplay, fbconfig, GLX_RGBA_TYPE, 0, True);
299 if (!render_context) {
300 fatalError("Failed to create a GL context\n");
301 }
302 }
303
304 if (!glXMakeContextCurrent(Xdisplay, glX_window_handle, glX_window_handle, render_context)) {
305 fatalError("glXMakeCurrent failed for window\n");
306 }
307}
308
309static int updateTheMessageQueue()
310{
311 XEvent event;
312 XConfigureEvent *xc;
313
314 while (XPending(Xdisplay))
315 {
316 XNextEvent(Xdisplay, &event);
317 switch (event.type)
318 {
319 case ClientMessage:
320 if ((unsigned int)event.xclient.data.l[0] == del_atom)
321 {
322 return 0;
323 }
324 break;
325
326 case ConfigureNotify:
327 xc = &(event.xconfigure);
328 width = xc->width;
329 height = xc->height;
330 break;
331 }
332 }
333 return 1;
334}
335
336/* 6----7
337 /| /|
338 3----2 |
339 | 5--|-4
340 |/ |/
341 0----1
342
343*/
344
345GLfloat cube_vertices[][8] = {
346 /* X Y Z Nx Ny Nz S T */
347 {-1.0, -1.0, 1.0, 0.0, 0.0, 1.0, 0.0, 0.0}, // 0
348 { 1.0, -1.0, 1.0, 0.0, 0.0, 1.0, 1.0, 0.0}, // 1
349 { 1.0, 1.0, 1.0, 0.0, 0.0, 1.0, 1.0, 1.0}, // 2
350 {-1.0, 1.0, 1.0, 0.0, 0.0, 1.0, 0.0, 1.0}, // 3
351
352 { 1.0, -1.0, -1.0, 0.0, 0.0, -1.0, 0.0, 0.0}, // 4
353 {-1.0, -1.0, -1.0, 0.0, 0.0, -1.0, 1.0, 0.0}, // 5
354 {-1.0, 1.0, -1.0, 0.0, 0.0, -1.0, 1.0, 1.0}, // 6
355 { 1.0, 1.0, -1.0, 0.0, 0.0, -1.0, 0.0, 1.0}, // 7
356
357 {-1.0, -1.0, -1.0, -1.0, 0.0, 0.0, 0.0, 0.0}, // 5
358 {-1.0, -1.0, 1.0, -1.0, 0.0, 0.0, 1.0, 0.0}, // 0
359 {-1.0, 1.0, 1.0, -1.0, 0.0, 0.0, 1.0, 1.0}, // 3
360 {-1.0, 1.0, -1.0, -1.0, 0.0, 0.0, 0.0, 1.0}, // 6
361
362 { 1.0, -1.0, 1.0, 1.0, 0.0, 0.0, 0.0, 0.0}, // 1
363 { 1.0, -1.0, -1.0, 1.0, 0.0, 0.0, 1.0, 0.0}, // 4
364 { 1.0, 1.0, -1.0, 1.0, 0.0, 0.0, 1.0, 1.0}, // 7
365 { 1.0, 1.0, 1.0, 1.0, 0.0, 0.0, 0.0, 1.0}, // 2
366
367 {-1.0, -1.0, -1.0, 0.0, -1.0, 0.0, 0.0, 0.0}, // 5
368 { 1.0, -1.0, -1.0, 0.0, -1.0, 0.0, 1.0, 0.0}, // 4
369 { 1.0, -1.0, 1.0, 0.0, -1.0, 0.0, 1.0, 1.0}, // 1
370 {-1.0, -1.0, 1.0, 0.0, -1.0, 0.0, 0.0, 1.0}, // 0
371
372 {-1.0, 1.0, 1.0, 0.0, 1.0, 0.0, 0.0, 0.0}, // 3
373 { 1.0, 1.0, 1.0, 0.0, 1.0, 0.0, 1.0, 0.0}, // 2
374 { 1.0, 1.0, -1.0, 0.0, 1.0, 0.0, 1.0, 1.0}, // 7
375 {-1.0, 1.0, -1.0, 0.0, 1.0, 0.0, 0.0, 1.0}, // 6
376};
377
378static void draw_cube(void)
379{
380 glEnableClientState(GL_VERTEX_ARRAY);
381 glEnableClientState(GL_NORMAL_ARRAY);
382 glEnableClientState(GL_TEXTURE_COORD_ARRAY);
383
384 glVertexPointer(3, GL_FLOAT, sizeof(GLfloat) * 8, &cube_vertices[0][0]);
385 glNormalPointer(GL_FLOAT, sizeof(GLfloat) * 8, &cube_vertices[0][3]);
386 glTexCoordPointer(2, GL_FLOAT, sizeof(GLfloat) * 8, &cube_vertices[0][6]);
387
388 glDrawArrays(GL_QUADS, 0, 24);
389}
390
391float const light0_dir[]={0,1,0,0};
392float const light0_color[]={78./255., 80./255., 184./255.,1};
393
394float const light1_dir[]={-1,1,1,0};
395float const light1_color[]={255./255., 220./255., 97./255.,1};
396
397float const light2_dir[]={0,-1,0,0};
398float const light2_color[]={31./255., 75./255., 16./255.,1};
399
400static void redrawTheWindow()
401{
402 float const aspect = (float)width / (float)height;
403
404 static float a=0;
405 static float b=0;
406 static float c=0;
407
408 glDrawBuffer(GL_BACK);
409
410 glViewport(0, 0, width, height);
411
412 // Clear with alpha = 0.0, i.e. full transparency
413 glClearColor(0.0, 0.0, 0.0, 0.0);
414 glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
415
416 glMatrixMode(GL_PROJECTION);
417 glLoadIdentity();
418 glFrustum(-aspect, aspect, -1, 1, 2.5, 10);
419
420 glMatrixMode(GL_MODELVIEW);
421 glLoadIdentity();
422
423 glEnable(GL_DEPTH_TEST);
424 glEnable(GL_CULL_FACE);
425
426 glEnable(GL_BLEND);
427 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
428
429 glLightfv(GL_LIGHT0, GL_POSITION, light0_dir);
430 glLightfv(GL_LIGHT0, GL_DIFFUSE, light0_color);
431
432 glLightfv(GL_LIGHT1, GL_POSITION, light1_dir);
433 glLightfv(GL_LIGHT1, GL_DIFFUSE, light1_color);
434
435 glLightfv(GL_LIGHT2, GL_POSITION, light2_dir);
436 glLightfv(GL_LIGHT2, GL_DIFFUSE, light2_color);
437
438 glTranslatef(0., 0., -5.);
439
440 glRotatef(a, 1, 0, 0);
441 glRotatef(b, 0, 1, 0);
442 glRotatef(c, 0, 0, 1);
443
444 glEnable(GL_LIGHT0);
445 glEnable(GL_LIGHT1);
446 glEnable(GL_LIGHTING);
447
448 glEnable(GL_COLOR_MATERIAL);
449 glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);
450
451 glColor4f(1., 1., 1., 0.5);
452
453 glCullFace(GL_FRONT);
454 draw_cube();
455 glCullFace(GL_BACK);
456 draw_cube();
457
458 a = fmod(a+0.1, 360.);
459 b = fmod(b+0.5, 360.);
460 c = fmod(c+0.25, 360.);
461
462 glXSwapBuffers(Xdisplay, glX_window_handle);
463}
464
465int main(int argc, char *argv[])
466{
467 createTheWindow();
468 createTheRenderContext();
469
470 while (updateTheMessageQueue()) {
471 redrawTheWindow();
472 }
473
474 return 0;
475}
Can people with some flavor of *NIX compile this and try it? Compilation should be as easy as : g++ -Wall -g -I/usr/include -c xglx_trans.cpp -o xglx_trans.o g++ -L/usr/X11/lib -L/usr/lib/x86_64-linux-gnu -o XTranslucency xglx_trans.o -lX11 -lGLX -lGLU -lGL -lXrender
UPDATE Windows : Linux My Website! | EAGLE GUI Library Demos | My Deviant Art Gallery | Spiraloid Preview | A4 FontMaker | Skyline! (Missile Defense) Eagle and Allegro 5 binaries | Older Allegro 4 and 5 binaries | Allegro 5 compile guide |
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LennyLen
Member #5,313
December 2004
 |
I tried the Windows example. The translucency on the triangle was working fine but there was none on the running man.
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Edgar Reynaldo
Major Reynaldo
May 2007
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{"name":"lollipop1.jpg","src":"\/\/djungxnpq2nug.cloudfront.net\/image\/cache\/4\/8\/48d0423c04adcaa027b88d78ae5a5195.jpg","w":390,"h":600,"tn":"\/\/djungxnpq2nug.cloudfront.net\/image\/cache\/4\/8\/48d0423c04adcaa027b88d78ae5a5195"} Interesting, LennyLen. I'll look into it. What version of Windows are you running? The running man example was with a quickly hacked allegro. The triangle was clean win32 and opengl with help from wglarb by datenwolf. My Website! | EAGLE GUI Library Demos | My Deviant Art Gallery | Spiraloid Preview | A4 FontMaker | Skyline! (Missile Defense) Eagle and Allegro 5 binaries | Older Allegro 4 and 5 binaries | Allegro 5 compile guide |
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LennyLen
Member #5,313
December 2004
|
Edgar Reynaldo said: Interesting, LennyLen. I'll look into it. What version of Windows are you running? Windows 10, version 1903, OS build 18362.476
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Edgar Reynaldo
Major Reynaldo
May 2007
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I'm running the same version, and it works for me.... ? And I can't tell the difference between what I did with datenwolf's wglarb and my hacked allegro. So I don't know why it's not working. Can you post your allegro.log file for me? You can also run it from the command line and see if there are any errors. My Website! | EAGLE GUI Library Demos | My Deviant Art Gallery | Spiraloid Preview | A4 FontMaker | Skyline! (Missile Defense) Eagle and Allegro 5 binaries | Older Allegro 4 and 5 binaries | Allegro 5 compile guide |
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LennyLen
Member #5,313
December 2004
|
Edgar Reynaldo said: I'm running the same version, and it works for me.... ? Is the running man himself supposed to be translucent or is the background just supposed to be transparent? Because if it's the latter, then it is working. There were no errors while running from the command line, and the log file is attached.
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Edgar Reynaldo
Major Reynaldo
May 2007
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Ah, good. So it is working. There was no aliasing on the running man, just wanted to see him run around my desktop. So no square window right? EDIT *EDIT* My Website! | EAGLE GUI Library Demos | My Deviant Art Gallery | Spiraloid Preview | A4 FontMaker | Skyline! (Missile Defense) Eagle and Allegro 5 binaries | Older Allegro 4 and 5 binaries | Allegro 5 compile guide |
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LennyLen
Member #5,313
December 2004
|
Edgar Reynaldo said: So no square window right? Correct. Quote: Here's the same running man demo, but he's on top, and up and down keys control alpha value, so you can see he's really translucent. I think you attached the wrong project.
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LennyLen
Member #5,313
December 2004
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Seems to be working fine.
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Edgar Reynaldo
Major Reynaldo
May 2007
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When you turned the alpha down, was it still pretty red on his shoes when he was supposed to be all translucent? So because you only need DWM, this also works for DX, so it's now a win32 translucency function that I'm adding to allegro. My Website! | EAGLE GUI Library Demos | My Deviant Art Gallery | Spiraloid Preview | A4 FontMaker | Skyline! (Missile Defense) Eagle and Allegro 5 binaries | Older Allegro 4 and 5 binaries | Allegro 5 compile guide |
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LennyLen
Member #5,313
December 2004
|
I made a short video of it running while I adjusted the settings: 
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Edgar Reynaldo
Major Reynaldo
May 2007
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Thanks to Elias, we can do it on X11 with GLX now too. Any OSX users out there? We need your help! EDIT Peter Hull? Mark Oates? SiegeLord? Anybuddy? EDIT2 My Website! | EAGLE GUI Library Demos | My Deviant Art Gallery | Spiraloid Preview | A4 FontMaker | Skyline! (Missile Defense) Eagle and Allegro 5 binaries | Older Allegro 4 and 5 binaries | Allegro 5 compile guide |
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