gallium: rename 'state tracker' to 'frontend'

Acked-by: Eric Anholt <[email protected]>
Acked-by: Alyssa Rosenzweig <[email protected]>
Acked-by: Pierre-Eric Pelloux-Prayer <[email protected]>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4902>

1 files changed, 212 insertions, 0 deletions

diff --git a/src/gallium/frontends/wgl/stw_ext_context.c b/src/gallium/frontends/wgl/stw_ext_context.c
new file mode 100644
index 00000000000..4171987f89c
--- /dev/null
+++ b/src/gallium/frontends/wgl/stw_ext_context.c
@@ -0,0 +1,212 @@
+/*
+ * Mesa 3-D graphics library
+ *
+ * Copyright (C) 2011 Morgan Armand <[email protected]>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdio.h>
+#include <windows.h>
+
+#define WGL_WGLEXT_PROTOTYPES
+
+#include <GL/gl.h>
+#include <GL/wglext.h>
+
+#include "gldrv.h"
+#include "stw_context.h"
+#include "stw_device.h"
+#include "stw_ext_context.h"
+
+#include "util/u_debug.h"
+
+
+wglCreateContext_t wglCreateContext_func = 0;
+wglDeleteContext_t wglDeleteContext_func = 0;
+
+
+/**
+ * The implementation of this function is tricky.  The OPENGL32.DLL library
+ * remaps the context IDs returned by our stw_create_context_attribs()
+ * function to different values returned to the caller of wglCreateContext().
+ * That is, DHGLRC (driver) handles are not equivalent to HGLRC (public)
+ * handles.
+ *
+ * So we need to generate a new HGLRC ID here.  We do that by calling
+ * the regular wglCreateContext() function.  Then, we replace the newly-
+ * created stw_context with a new stw_context that reflects the arguments
+ * to this function.
+ */
+HGLRC WINAPI
+wglCreateContextAttribsARB(HDC hDC, HGLRC hShareContext, const int *attribList)
+{
+   HGLRC context;
+
+   int majorVersion = 1, minorVersion = 0, layerPlane = 0;
+   int contextFlags = 0x0;
+   int profileMask = WGL_CONTEXT_CORE_PROFILE_BIT_ARB;
+   int i;
+   BOOL done = FALSE;
+   const int contextFlagsAll = (WGL_CONTEXT_DEBUG_BIT_ARB |
+                                WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB);
+
+   /* parse attrib_list */
+   if (attribList) {
+      for (i = 0; !done && attribList[i]; i++) {
+         switch (attribList[i]) {
+         case WGL_CONTEXT_MAJOR_VERSION_ARB:
+            majorVersion = attribList[++i];
+            break;
+         case WGL_CONTEXT_MINOR_VERSION_ARB:
+            minorVersion = attribList[++i];
+            break;
+         case WGL_CONTEXT_LAYER_PLANE_ARB:
+            layerPlane = attribList[++i];
+            break;
+         case WGL_CONTEXT_FLAGS_ARB:
+            contextFlags = attribList[++i];
+            break;
+         case WGL_CONTEXT_PROFILE_MASK_ARB:
+            profileMask = attribList[++i];
+            break;
+         case 0:
+            /* end of list */
+            done = TRUE;
+            break;
+         default:
+            /* bad attribute */
+            SetLastError(ERROR_INVALID_PARAMETER);
+            return 0;
+         }
+      }
+   }
+
+   /* check contextFlags */
+   if (contextFlags & ~contextFlagsAll) {
+      SetLastError(ERROR_INVALID_PARAMETER);
+      return NULL;
+   }
+
+   /* check profileMask */
+   if (profileMask != WGL_CONTEXT_CORE_PROFILE_BIT_ARB &&
+       profileMask != WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB &&
+       profileMask != WGL_CONTEXT_ES_PROFILE_BIT_EXT) {
+      SetLastError(ERROR_INVALID_PROFILE_ARB);
+      return NULL;
+   }
+
+   /* check version (generate ERROR_INVALID_VERSION_ARB if bad) */
+   if (majorVersion <= 0 ||
+       minorVersion < 0 ||
+       (profileMask != WGL_CONTEXT_ES_PROFILE_BIT_EXT &&
+        ((majorVersion == 1 && minorVersion > 5) ||
+         (majorVersion == 2 && minorVersion > 1) ||
+         (majorVersion == 3 && minorVersion > 3) ||
+         (majorVersion == 4 && minorVersion > 5) ||
+         majorVersion > 4)) ||
+       (profileMask == WGL_CONTEXT_ES_PROFILE_BIT_EXT &&
+        ((majorVersion == 1 && minorVersion > 1) ||
+         (majorVersion == 2 && minorVersion > 0) ||
+         (majorVersion == 3 && minorVersion > 1) ||
+         majorVersion > 3))) {
+      SetLastError(ERROR_INVALID_VERSION_ARB);
+      return NULL;
+   }
+
+   if ((contextFlags & WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB) &&
+       majorVersion < 3) {
+      SetLastError(ERROR_INVALID_VERSION_ARB);
+      return 0;
+   }
+
+   /* Get pointer to OPENGL32.DLL's wglCreate/DeleteContext() functions */
+   if (!wglCreateContext_func || !wglDeleteContext_func) {
+      /* Get the OPENGL32.DLL library */
+      HMODULE opengl_lib = GetModuleHandleA("opengl32.dll");
+      if (!opengl_lib) {
+         _debug_printf("wgl: GetModuleHandleA(\"opengl32.dll\") failed\n");
+         return 0;
+      }
+
+      /* Get pointer to wglCreateContext() function */
+      wglCreateContext_func = (wglCreateContext_t)
+         GetProcAddress(opengl_lib, "wglCreateContext");
+      if (!wglCreateContext_func) {
+         _debug_printf("wgl: failed to get wglCreateContext()\n");
+         return 0;
+      }
+
+      /* Get pointer to wglDeleteContext() function */
+      wglDeleteContext_func = (wglDeleteContext_t)
+         GetProcAddress(opengl_lib, "wglDeleteContext");
+      if (!wglDeleteContext_func) {
+         _debug_printf("wgl: failed to get wglDeleteContext()\n");
+         return 0;
+      }
+   }
+
+   /* Call wglCreateContext to get a valid context ID */
+   context = wglCreateContext_func(hDC);
+
+   if (context) {
+      /* Now replace the context we just created with a new one that reflects
+       * the attributes passed to this function.
+       */
+      DHGLRC dhglrc, c, share_dhglrc = 0;
+
+      /* Convert public HGLRC to driver DHGLRC */
+      if (stw_dev && stw_dev->callbacks.pfnGetDhglrc) {
+         dhglrc = stw_dev->callbacks.pfnGetDhglrc(context);
+         if (hShareContext)
+            share_dhglrc = stw_dev->callbacks.pfnGetDhglrc(hShareContext);
+      }
+      else {
+         /* not using ICD */
+         dhglrc = (DHGLRC)(INT_PTR)context;
+         share_dhglrc = (DHGLRC)(INT_PTR)hShareContext;
+      }
+
+      c = stw_create_context_attribs(hDC, layerPlane, share_dhglrc,
+                                     majorVersion, minorVersion,
+                                     contextFlags, profileMask,
+                                     dhglrc);
+      if (!c) {
+         wglDeleteContext_func(context);
+         context = 0;
+      }
+   }
+
+   return context;
+}
+
+
+/** Defined by WGL_ARB_make_current_read */
+BOOL APIENTRY
+wglMakeContextCurrentARB(HDC hDrawDC, HDC hReadDC, HGLRC hglrc)
+{
+   DHGLRC dhglrc = 0;
+
+   if (stw_dev && stw_dev->callbacks.pfnGetDhglrc) {
+      /* Convert HGLRC to DHGLRC */
+      dhglrc = stw_dev->callbacks.pfnGetDhglrc(hglrc);
+   }
+
+   return stw_make_current(hDrawDC, hReadDC, dhglrc);
+}