- implement partial PBuffer support

dlls/opengl32/wgl_ext.c

 /* Support for window-specific OpenGL extensions.
  *
  * Copyright (c) 2004 Lionel Ulmer
+ * Copyright (c) 2005 Alex Woods
+ * Copyright (c) 2005 Raphael Junqueira
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -37,15 +39,82 @@
 
 WINE_DEFAULT_DEBUG_CHANNEL(opengl);
 
+
+/* x11drv GDI escapes */
+#define X11DRV_ESCAPE 6789
+enum x11drv_escape_codes
+{
+    X11DRV_GET_DISPLAY,   /* get X11 display for a DC */
+    X11DRV_GET_DRAWABLE,  /* get current drawable for a DC */
+    X11DRV_GET_FONT,      /* get current X font for a DC */
+    X11DRV_SET_DRAWABLE,     /* set current drawable for a DC */
+};
+struct x11drv_escape_set_drawable
+{
+    enum x11drv_escape_codes code;         /* escape code (X11DRV_SET_DRAWABLE) */
+    Drawable                 drawable;     /* X drawable */
+    int                      mode;         /* ClipByChildren or IncludeInferiors */
+    POINT                    org;          /* origin of DC relative to drawable */
+    POINT                    drawable_org; /* origin of drawable relative to screen */
+};
+
+/* retrieve the X display to use on a given DC */
+inline static Display *get_display( HDC hdc )
+{
+    Display *display;
+    enum x11drv_escape_codes escape = X11DRV_GET_DISPLAY;
+
+    if (!ExtEscape( hdc, X11DRV_ESCAPE, sizeof(escape), (LPCSTR)&escape,
+                    sizeof(display), (LPSTR)&display )) display = NULL;
+    return display;
+}
+inline static void set_drawable( HDC hdc, Drawable drawable )
+{
+    struct x11drv_escape_set_drawable escape;
+
+    escape.code = X11DRV_SET_DRAWABLE;
+    escape.drawable = drawable;
+    escape.mode = IncludeInferiors;
+    escape.org.x = escape.org.y = 0;
+    escape.drawable_org.x = escape.drawable_org.y = 0;
+
+    ExtEscape( hdc, X11DRV_ESCAPE, sizeof(escape), (LPCSTR)&escape, 0, NULL );
+}
+
 /* Some WGL extensions... */
 static const char *WGL_extensions_base = "WGL_ARB_extensions_string WGL_EXT_extensions_string";
 static char *WGL_extensions = NULL;
 
 /* Extensions-query functions */
-BOOL query_function_pbuffers(const char *gl_version, const char *gl_extensions, const char *glx_extensions,
-			     const char *server_glx_extensions, const char *client_glx_extensions)
+BOOL query_function_multisample(const char *gl_version, const char *gl_extensions, 
+				const char* glx_version, const char *glx_extensions,
+				const char *server_glx_extensions, const char *client_glx_extensions)
 {
-    return FALSE;
+  return NULL != strstr("GLX_ARB_multisample", glx_extensions);
+}
+
+BOOL query_function_pbuffer(const char *gl_version, const char *gl_extensions, 
+			    const char* glx_version, const char *glx_extensions,
+			    const char *server_glx_extensions, const char *client_glx_extensions)
+{
+  FIXME("gl_version is: \"%s\"\n", gl_version);
+  FIXME("glx_exts is: \"%s\"\n", glx_extensions);
+
+  return 0 <= strcmp("1.3", glx_version) || NULL != strstr(glx_extensions, "GLX_SGIX_pbuffer");
+}
+
+BOOL query_function_pixel_format(const char *gl_version, const char *gl_extensions, 
+				 const char* glx_version, const char *glx_extensions,
+				 const char *server_glx_extensions, const char *client_glx_extensions)
+{
+  return TRUE;
+}
+
+BOOL query_function_render_texture(const char *gl_version, const char *gl_extensions, 
+				   const char* glx_version, const char *glx_extensions,
+				   const char *server_glx_extensions, const char *client_glx_extensions)
+{
+  return 0 <= strcmp("1.3", glx_version) || NULL != strstr(glx_extensions, "GLX_SGIX_pbuffer");
 }
 
 /***********************************************************************
@@ -86,12 +155,268 @@ int WINAPI wglGetSwapIntervalEXT(VOID) {
     return swap_interval;
 }
 
+typedef struct wine_glpbuffer {
+  Drawable   drawable;
+  Display*   display;
+  int        pixelFormat;
+  int        width;
+  int        height;
+  int*       attribList;
+  HDC        hdc;
+} Wine_GLPBuffer;
+
+#define PUSH1(attribs,att)        attribs[nAttribs++] = (att); 
+#define PUSH2(attribs,att,value)  attribs[nAttribs++] = (att); attribs[nAttribs++] = (value);
+
+#define WGL_NUMBER_PIXEL_FORMATS_ARB		0x2000
+#define WGL_DRAW_TO_WINDOW_ARB			0x2001
+#define WGL_DRAW_TO_BITMAP_ARB			0x2002
+#define WGL_ACCELERATION_ARB			0x2003
+#define WGL_NEED_PALETTE_ARB			0x2004
+#define WGL_NEED_SYSTEM_PALETTE_ARB		0x2005
+#define WGL_SWAP_LAYER_BUFFERS_ARB		0x2006
+#define WGL_SWAP_METHOD_ARB			0x2007
+#define WGL_NUMBER_OVERLAYS_ARB			0x2008
+#define WGL_NUMBER_UNDERLAYS_ARB		0x2009
+#define WGL_TRANSPARENT_ARB			0x200A
+#define WGL_TRANSPARENT_RED_VALUE_ARB		0x2037
+#define WGL_TRANSPARENT_GREEN_VALUE_ARB		0x2038
+#define WGL_TRANSPARENT_BLUE_VALUE_ARB		0x2039
+#define WGL_TRANSPARENT_ALPHA_VALUE_ARB		0x203A
+#define WGL_TRANSPARENT_INDEX_VALUE_ARB		0x203B
+#define WGL_SHARE_DEPTH_ARB			0x200C
+#define WGL_SHARE_STENCIL_ARB			0x200D
+#define WGL_SHARE_ACCUM_ARB			0x200E
+#define WGL_SUPPORT_GDI_ARB			0x200F
+#define WGL_SUPPORT_OPENGL_ARB			0x2010
+#define WGL_DOUBLE_BUFFER_ARB			0x2011
+#define WGL_STEREO_ARB				0x2012
+#define WGL_PIXEL_TYPE_ARB			0x2013
+#define WGL_COLOR_BITS_ARB			0x2014
+#define WGL_RED_BITS_ARB			0x2015
+#define WGL_RED_SHIFT_ARB			0x2016
+#define WGL_GREEN_BITS_ARB			0x2017
+#define WGL_GREEN_SHIFT_ARB			0x2018
+#define WGL_BLUE_BITS_ARB			0x2019
+#define WGL_BLUE_SHIFT_ARB			0x201A
+#define WGL_ALPHA_BITS_ARB			0x201B
+#define WGL_ALPHA_SHIFT_ARB			0x201C
+#define WGL_ACCUM_BITS_ARB			0x201D
+#define WGL_ACCUM_RED_BITS_ARB			0x201E
+#define WGL_ACCUM_GREEN_BITS_ARB		0x201F
+#define WGL_ACCUM_BLUE_BITS_ARB			0x2020
+#define WGL_ACCUM_ALPHA_BITS_ARB		0x2021
+#define WGL_DEPTH_BITS_ARB			0x2022
+#define WGL_STENCIL_BITS_ARB			0x2023
+#define WGL_AUX_BUFFERS_ARB			0x2024
+
+#define WGL_PBUFFER_WIDTH_ARB                0x2034
+#define WGL_PBUFFER_HEIGHT_ARB               0x2035
+#define WGL_PBUFFER_LOST_ARB                 0x2036
+
+#if 0 /* not used yet */
+static unsigned ConvertAttribGLXtoWGL(const int* iWGLAttr, int* oGLXAttr) {
+  unsigned nAttribs = 0;
+  FIXME("not yet implemented!\n");
+  return nAttribs;
+}
+#endif
+
+static unsigned ConvertAttribWGLtoGLX(const int* iWGLAttr, int* oGLXAttr) {
+  unsigned nAttribs = 0;
+  unsigned cur = 0; 
+  int pop;
+
+  while (0 != iWGLAttr[cur]) {
+    switch (iWGLAttr[cur]) {
+    case WGL_COLOR_BITS_ARB:
+      pop = iWGLAttr[++cur];
+      PUSH2(oGLXAttr, GLX_BUFFER_SIZE, pop);
+      break;
+    case WGL_ALPHA_BITS_ARB:
+      pop = iWGLAttr[++cur];
+      PUSH2(oGLXAttr, GLX_ALPHA_SIZE, pop);
+      break;
+    case WGL_DEPTH_BITS_ARB:
+      pop = iWGLAttr[++cur];
+      PUSH2(oGLXAttr, GLX_DEPTH_SIZE, pop);
+      break;
+    case WGL_STENCIL_BITS_ARB:
+      pop = iWGLAttr[++cur];
+      PUSH2(oGLXAttr, GLX_STENCIL_SIZE, pop);
+      break;
+    case WGL_DOUBLE_BUFFER_ARB:
+      pop = iWGLAttr[++cur];
+      PUSH2(oGLXAttr, GLX_DOUBLEBUFFER, pop);
+      break;
+    case WGL_DRAW_TO_WINDOW_ARB:
+    case WGL_SUPPORT_OPENGL_ARB:
+    case WGL_ACCELERATION_ARB:
+    /*
+    case WGL_SAMPLE_BUFFERS_ARB:
+    case WGL_SAMPLES_ARB:
+    */
+    default:
+      break;
+    }
+    ++cur;
+  }
+  return nAttribs;
+}
+
+GLboolean WINAPI wglGetPixelFormatAttribivARB(HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, const int *piAttributes, int *piValues)
+{
+    TRACE("(%p, %d, %d, %d, %p, %p)\n", hdc, iPixelFormat, iLayerPlane, nAttributes, piAttributes, piValues);
+    return GL_TRUE;
+}
+
+GLboolean WINAPI wglGetPixelFormatAttribfvARB(HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, const int *piAttributes, FLOAT *pfValues)
+{
+    TRACE("(%p, %d, %d, %d, %p, %p)\n", hdc, iPixelFormat, iLayerPlane, nAttributes, piAttributes, pfValues);
+    return GL_TRUE;
+}
+
+GLboolean WINAPI wglChoosePixelFormatARB(HDC hdc, const int *piAttribIList, const FLOAT *pfAttribFList, UINT nMaxFormats, int *piFormats, UINT *nNumFormats)
+{
+  Display* display = get_display( hdc );
+  GLXFBConfig* cfgs = NULL;
+  int nCfgs = 0;
+  int attribs[256];
+  unsigned nAttribs;
+  UINT it;
+
+  TRACE("(%p, %p, %p, %d, %p, %p): hackish\n", hdc, piAttribIList, pfAttribFList, nMaxFormats, piFormats, nNumFormats);
+  if (NULL != pfAttribFList) {
+    FIXME("unused pfAttribFList\n");
+  }
+
+  nAttribs = ConvertAttribWGLtoGLX(piAttribIList, attribs);
+  PUSH1(attribs, None);
+
+  cfgs = glXChooseFBConfig(display, DefaultScreen(display), attribs, &nCfgs);
+  for (it = 0; it < nMaxFormats && it < nCfgs; ++it) {
+    piFormats[it] = it;
+  }
+  *nNumFormats = it;
+  return GL_TRUE;
+}
+
+#define HPBUFFERARB void *
+HPBUFFERARB WINAPI wglCreatePbufferARB(HDC hdc, int iPixelFormat, int iWidth, int iHeight, const int *piAttribList)
+{
+  Wine_GLPBuffer* object = NULL;
+  Display* display = get_display( hdc );
+  GLXFBConfig* cfgs = NULL;
+  int nCfgs = 0;
+  int attribs[256];
+  unsigned nAttribs;
+
+  TRACE("(%p, %d, %d, %d, %p)\n", hdc, iPixelFormat, iWidth, iHeight, piAttribList);
+
+  object = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(Wine_GLPBuffer));
+  object->hdc = hdc;
+  object->display = display;
+  object->width = iWidth;
+  object->height = iHeight;
+  object->pixelFormat = iPixelFormat;
+
+  nAttribs = ConvertAttribWGLtoGLX(piAttribList, attribs);
+  PUSH1(attribs, None);
+
+  cfgs = glXChooseFBConfig(display, DefaultScreen(display), attribs, &nCfgs);
+  if (nCfgs < iPixelFormat) return NULL; /* unespected error */
+
+  --nAttribs; /** append more to attribs now we have fbConfig */
+  PUSH2(attribs, GLX_PBUFFER_WIDTH,  iWidth);
+  PUSH2(attribs, GLX_PBUFFER_HEIGHT, iHeight);
+  PUSH1(attribs, None);
+
+  object->drawable = glXCreatePbuffer(display, cfgs[iPixelFormat], attribs);
+  TRACE("drawable as %p\n", (void*) object->drawable);
+
+  TRACE("->(%p)\n", object);
+  return (HPBUFFERARB) object;
+}
+
+HDC WINAPI wglGetPbufferDCARB(HPBUFFERARB hPbuffer)
+{
+  Wine_GLPBuffer* object = (Wine_GLPBuffer*) hPbuffer;
+  HDC hDC;
+  hDC = CreateCompatibleDC(object->hdc);
+  set_drawable(hDC, object->drawable); /* works ?? */
+  TRACE("(%p)\n", hPbuffer);
+  return hDC;
+}
+
+int WINAPI wglReleasePbufferDCARB(HPBUFFERARB hPbuffer, HDC hdc)
+{
+  TRACE("(%p, %p)\n", hPbuffer, hdc);
+  DeleteDC(hdc);
+  return 0;
+}
+
+GLboolean WINAPI wglDestroyPbufferARB(HPBUFFERARB hPbuffer)
+{
+  Wine_GLPBuffer* object = (Wine_GLPBuffer*) hPbuffer;
+  TRACE("(%p)\n", hPbuffer);
+
+  glXDestroyPbuffer(object->display, object->drawable);
+  HeapFree(GetProcessHeap(), 0, object);
+
+  return GL_TRUE;
+}
+
+GLboolean WINAPI wglQueryPbufferARB(HPBUFFERARB hPbuffer, int iAttribute, int *piValue)
+{
+  Wine_GLPBuffer* object = (Wine_GLPBuffer*) hPbuffer;
+  TRACE("(%p, %d, %p)\n", hPbuffer, iAttribute, piValue);
+
+  /*glXQueryDrawable(object->display, object->drawable);*/
+
+  switch (iAttribute) {
+  case WGL_PBUFFER_WIDTH_ARB:
+    glXQueryDrawable(object->display, object->drawable, GLX_WIDTH, piValue);
+    break;
+  case WGL_PBUFFER_HEIGHT_ARB:
+    glXQueryDrawable(object->display, object->drawable, GLX_HEIGHT, piValue);
+    break;
+
+  default:
+    break;
+  }
+
+
+  return GL_TRUE;
+}
+
+GLboolean WINAPI wglBindTexImageARB(HPBUFFERARB hPbuffer, int iBuffer)
+{
+  TRACE("(%p, %d)\n", hPbuffer, iBuffer);
+  return GL_TRUE;
+}
+
+GLboolean WINAPI wglReleaseTexImageARB(HPBUFFERARB hPbuffer, int iBuffer)
+{
+  TRACE("(%p, %d)\n", hPbuffer, iBuffer);
+  return GL_TRUE;
+}
+
+GLboolean WINAPI wglSetPbufferAttribARB(HPBUFFERARB hPbuffer, const int *piAttribList)
+{
+  TRACE("(%p, %p)\n", hPbuffer, piAttribList);
+  return GL_TRUE;
+}
+
 static const struct {
     const char *name;
-    BOOL (*query_function)(const char *gl_version, const char *gl_extensions, const char *glx_extensions,
+    BOOL (*query_function)(const char *gl_version, const char *gl_extensions,
+			   const char *glx_version, const char *glx_extensions,
 			   const char *server_glx_extensions, const char *client_glx_extensions);
 } extension_list[] = {
-    { "WGL_ARB_pbuffer", query_function_pbuffers }
+  { "WGL_ARB_multisample", query_function_multisample },
+  { "WGL_ARB_pbuffer", query_function_pbuffer },
+  { "WGL_ARB_pixel_format" , query_function_pixel_format },
+  { "WGL_ARB_render_texture", query_function_render_texture }
 };
 
 /* Used to initialize the WGL extension string at DLL loading */
@@ -103,6 +428,7 @@ void wgl_ext_initialize_extensions(Display *display, int screen)
     const char *client_glx_extensions = glXGetClientString(display, GLX_EXTENSIONS);
     const char *gl_extensions = (const char *) glGetString(GL_EXTENSIONS);
     const char *gl_version = (const char *) glGetString(GL_VERSION);
+    const char *glx_version = glXGetClientString(display, GLX_VERSION);
     int i;
 
     TRACE("GL version      : %s.\n", debugstr_a(gl_version));
@@ -112,7 +438,8 @@ void wgl_ext_initialize_extensions(Display *display, int screen)
     TRACE("Client GLX exts : %s.\n", debugstr_a(client_glx_extensions));
 
     for (i = 0; i < (sizeof(extension_list) / sizeof(extension_list[0])); i++) {
-	if (extension_list[i].query_function(gl_version, gl_extensions, glx_extensions,
+	if (extension_list[i].query_function(gl_version, gl_extensions, 
+					     glx_version, glx_extensions,
 					     server_glx_extensions, client_glx_extensions)) {
 	    size += strlen(extension_list[i].name) + 1;
 	}
@@ -125,7 +452,8 @@ void wgl_ext_initialize_extensions(Display *display, int screen)
     } else {
 	strcpy(WGL_extensions, WGL_extensions_base);
 	for (i = 0; i < (sizeof(extension_list) / sizeof(extension_list[0])); i++) {
-	    if (extension_list[i].query_function(gl_version, gl_extensions, glx_extensions,
+	    if (extension_list[i].query_function(gl_version, gl_extensions, 
+						 glx_version, glx_extensions,
 						 server_glx_extensions, client_glx_extensions)) {
 		strcat(WGL_extensions, " ");
 		strcat(WGL_extensions, extension_list[i].name);
@@ -143,11 +471,26 @@ void wgl_ext_finalize_extensions(void)
     }
 }
 
-/* Putting this at the end to prevent having to write the prototypes :-) */
+/*
+ * Putting this at the end to prevent having to write the prototypes :-) 
+ *
+ * @WARNING: this list must be ordered by name
+ */
 WGL_extension wgl_extension_registry[] = {
+    { "wglBindTexImageARB", (void *) wglBindTexImageARB, NULL, NULL},
+    { "wglChoosePixelFormatARB", (void *) wglChoosePixelFormatARB, NULL, NULL},
+    { "wglCreatePbufferARB", (void *) wglCreatePbufferARB, NULL, NULL},
+    { "wglDestroyPbufferARB", (void *) wglDestroyPbufferARB, NULL, NULL},
     { "wglGetExtensionsStringARB", (void *) wglGetExtensionsStringARB, NULL, NULL},
     { "wglGetExtensionsStringEXT", (void *) wglGetExtensionsStringEXT, NULL, NULL},
-    { "wglGetSwapIntervalEXT", (void *) wglSwapIntervalEXT, NULL, NULL},
+    { "wglGetPbufferDCARB", (void *) wglGetPbufferDCARB, NULL, NULL},
+    { "wglGetPixelFormatAttribfvARB", (void *) wglGetPixelFormatAttribfvARB, NULL, NULL},
+    { "wglGetPixelFormatAttribivARB", (void *) wglGetPixelFormatAttribivARB, NULL, NULL},
+    { "wglGetSwapIntervalEXT", (void *) wglGetSwapIntervalEXT, NULL, NULL},
+    { "wglQueryPbufferARB", (void *) wglQueryPbufferARB, NULL, NULL},
+    { "wglReleasePbufferDCARB", (void *) wglReleasePbufferDCARB, NULL, NULL},
+    { "wglReleaseTexImageARB", (void *) wglReleaseTexImageARB, NULL, NULL},
+    { "wglSetPbufferAttribARB", (void *) wglSetPbufferAttribARB, NULL, NULL},
     { "wglSwapIntervalEXT", (void *) wglSwapIntervalEXT, NULL, NULL}
 };
 int wgl_extension_registry_size = sizeof(wgl_extension_registry) / sizeof(wgl_extension_registry[0]);