[3/3] glx: Implement GLX_EXT_no_config_context (v4)

Submitted by Adam Jackson on Dec. 5, 2017, 9:22 p.m.

Details

Message ID 20171205212205.2422-4-ajax@redhat.com
State New
Headers show
Series "GLX_EXT_no_config_context v4" ( rev: 1 ) in Mesa

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Commit Message

Adam Jackson Dec. 5, 2017, 9:22 p.m.
This more or less ports EGL_KHR_no_config_context to GLX.

v2: Enable the extension only for those backends that support it.
v3: Fix glvnd path and dri2_convert_glx_attribs()
v4: Screeching signedness correctness, and disable a now
    inappropriate test.

Khronos: https://github.com/KhronosGroup/OpenGL-Registry/pull/102
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Signed-off-by: Adam Jackson <ajax@redhat.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
---
 src/glx/applegl_glx.c                     |  3 +++
 src/glx/create_context.c                  | 37 +++++++++++++++++++------------
 src/glx/dri2_glx.c                        |  1 +
 src/glx/dri3_glx.c                        |  1 +
 src/glx/dri_common.c                      |  4 ++++
 src/glx/drisw_glx.c                       |  1 +
 src/glx/driwindows_glx.c                  |  2 +-
 src/glx/g_glxglvnddispatchfuncs.c         | 14 +++++++++++-
 src/glx/glxcmds.c                         |  2 +-
 src/glx/glxextensions.c                   |  1 +
 src/glx/glxextensions.h                   |  1 +
 src/glx/tests/create_context_unittest.cpp |  9 --------
 12 files changed, 50 insertions(+), 26 deletions(-)

Patch hide | download patch | download mbox

diff --git a/src/glx/applegl_glx.c b/src/glx/applegl_glx.c
index c086e5146a..85f70058c6 100644
--- a/src/glx/applegl_glx.c
+++ b/src/glx/applegl_glx.c
@@ -134,6 +134,9 @@  applegl_create_context(struct glx_screen *psc,
    /* TODO: Integrate this with apple_glx_create_context and make
     * struct apple_glx_context inherit from struct glx_context. */
 
+   if (!config)
+      return NULL;
+
    gc = calloc(1, sizeof(*gc));
    if (gc == NULL)
       return NULL;
diff --git a/src/glx/create_context.c b/src/glx/create_context.c
index 38e949ab4c..bc39ffef1d 100644
--- a/src/glx/create_context.c
+++ b/src/glx/create_context.c
@@ -47,21 +47,11 @@  glXCreateContextAttribsARB(Display *dpy, GLXFBConfig config,
    xcb_generic_error_t *err;
    xcb_void_cookie_t cookie;
    unsigned dummy_err = 0;
+   int screen = -1;
 
-
-   if (dpy == NULL || cfg == NULL)
-      return NULL;
-
-   /* This means that either the caller passed the wrong display pointer or
-    * one of the internal GLX data structures (probably the fbconfig) has an
-    * error.  There is nothing sensible to do, so return an error.
-    */
-   psc = GetGLXScreenConfigs(dpy, cfg->screen);
-   if (psc == NULL)
+   if (dpy == NULL)
       return NULL;
 
-   assert(cfg->screen == psc->scr);
-
    /* Count the number of attributes specified by the application.  All
     * attributes appear in pairs, except the terminating None.
     */
@@ -70,6 +60,25 @@  glXCreateContextAttribsARB(Display *dpy, GLXFBConfig config,
 	 /* empty */ ;
    }
 
+   if (cfg) {
+      screen = cfg->screen;
+   } else {
+      for (unsigned int i = 0; i < num_attribs; i++) {
+         if (attrib_list[i * 2] == GLX_SCREEN)
+            screen = attrib_list[i * 2 + 1];
+      }
+   }
+
+   /* This means that either the caller passed the wrong display pointer or
+    * one of the internal GLX data structures (probably the fbconfig) has an
+    * error.  There is nothing sensible to do, so return an error.
+    */
+   psc = GetGLXScreenConfigs(dpy, screen);
+   if (psc == NULL)
+      return NULL;
+
+   assert(screen == psc->scr);
+
    if (direct && psc->vtable->create_context_attribs) {
       /* GLX drops the error returned by the driver.  The expectation is that
        * an error will also be returned by the server.  The server's error
@@ -104,8 +113,8 @@  glXCreateContextAttribsARB(Display *dpy, GLXFBConfig config,
    cookie =
       xcb_glx_create_context_attribs_arb_checked(c,
 						 gc->xid,
-						 cfg->fbconfigID,
-						 cfg->screen,
+						 cfg ? cfg->fbconfigID : 0,
+						 screen,
 						 gc->share_xid,
 						 gc->isDirect,
 						 num_attribs,
diff --git a/src/glx/dri2_glx.c b/src/glx/dri2_glx.c
index 0f44635725..eeec4f0d60 100644
--- a/src/glx/dri2_glx.c
+++ b/src/glx/dri2_glx.c
@@ -1129,6 +1129,7 @@  dri2BindExtensions(struct dri2_screen *psc, struct glx_display * priv,
 
       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
+      __glXEnableDirectExtension(&psc->base, "GLX_EXT_no_config_context");
 
       if ((mask & ((1 << __DRI_API_GLES) |
                    (1 << __DRI_API_GLES2) |
diff --git a/src/glx/dri3_glx.c b/src/glx/dri3_glx.c
index f280a8cef7..f0560edeb5 100644
--- a/src/glx/dri3_glx.c
+++ b/src/glx/dri3_glx.c
@@ -720,6 +720,7 @@  dri3_bind_extensions(struct dri3_screen *psc, struct glx_display * priv,
 
    __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
    __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
+   __glXEnableDirectExtension(&psc->base, "GLX_EXT_no_config_context");
 
    if ((mask & ((1 << __DRI_API_GLES) |
                 (1 << __DRI_API_GLES2) |
diff --git a/src/glx/dri_common.c b/src/glx/dri_common.c
index ab5d6c5bc0..4930ce35a9 100644
--- a/src/glx/dri_common.c
+++ b/src/glx/dri_common.c
@@ -562,6 +562,10 @@  dri2_convert_glx_attribs(unsigned num_attribs, const uint32_t *attribs,
             return false;
          }
          break;
+      case GLX_SCREEN:
+         /* Implies GLX_EXT_no_config_context */
+         *render_type = GLX_DONT_CARE;
+         break;
       default:
 	 /* If an unknown attribute is received, fail.
 	  */
diff --git a/src/glx/drisw_glx.c b/src/glx/drisw_glx.c
index df2467a5c2..e33ac4f2a9 100644
--- a/src/glx/drisw_glx.c
+++ b/src/glx/drisw_glx.c
@@ -628,6 +628,7 @@  driswBindExtensions(struct drisw_screen *psc, const __DRIextension **extensions)
    if (psc->swrast->base.version >= 3) {
       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
+      __glXEnableDirectExtension(&psc->base, "GLX_EXT_no_config_context");
 
       /* DRISW version >= 2 implies support for OpenGL ES.
        */
diff --git a/src/glx/driwindows_glx.c b/src/glx/driwindows_glx.c
index 85525431bf..b2dc810f8c 100644
--- a/src/glx/driwindows_glx.c
+++ b/src/glx/driwindows_glx.c
@@ -240,7 +240,7 @@  driwindows_create_context_attribs(struct glx_screen *base,
      identical values, so far
    */
 
-   if (!psc->base.driScreen)
+   if (!psc->base.driScreen || !config_base)
       return NULL;
 
    /* Check the renderType value */
diff --git a/src/glx/g_glxglvnddispatchfuncs.c b/src/glx/g_glxglvnddispatchfuncs.c
index 56d894eda7..04f6d8263a 100644
--- a/src/glx/g_glxglvnddispatchfuncs.c
+++ b/src/glx/g_glxglvnddispatchfuncs.c
@@ -164,7 +164,19 @@  static GLXContext dispatch_CreateContextAttribsARB(Display *dpy,
     __GLXvendorInfo *dd;
     GLXContext ret;
 
-    dd = GetDispatchFromFBConfig(dpy, config);
+    if (config) {
+       dd = GetDispatchFromFBConfig(dpy, config);
+    } else if (attrib_list) {
+       int i, screen;
+
+       for (i = 0; attrib_list[i * 2] != None; i++) {
+          if (attrib_list[i * 2] == GLX_SCREEN) {
+             screen = attrib_list[i * 2 + 1];
+             dd = GetDispatchFromDrawable(dpy, RootWindow(dpy, screen));
+             break;
+          }
+       }
+    }
     if (dd == NULL)
         return None;
 
diff --git a/src/glx/glxcmds.c b/src/glx/glxcmds.c
index eee45d962d..bc5333588b 100644
--- a/src/glx/glxcmds.c
+++ b/src/glx/glxcmds.c
@@ -237,7 +237,7 @@  validate_renderType_against_config(const struct glx_config *config,
 {
    /* GLX_EXT_no_config_context supports any render type */
    if (!config)
-      return True;
+      return renderType == GLX_DONT_CARE;
 
    switch (renderType) {
       case GLX_RGBA_TYPE:
diff --git a/src/glx/glxextensions.c b/src/glx/glxextensions.c
index 638d8bcbbe..8cb4771869 100644
--- a/src/glx/glxextensions.c
+++ b/src/glx/glxextensions.c
@@ -146,6 +146,7 @@  static const struct extension_info known_glx_extensions[] = {
    { GLX(EXT_fbconfig_packed_float),   VER(0,0), Y, Y, N, N },
    { GLX(EXT_framebuffer_sRGB),        VER(0,0), Y, Y, N, N },
    { GLX(EXT_import_context),          VER(0,0), Y, Y, N, N },
+   { GLX(EXT_no_config_context),       VER(0,0), Y, N, N, N },
    { GLX(EXT_texture_from_pixmap),     VER(0,0), Y, N, N, N },
    { GLX(EXT_visual_info),             VER(0,0), Y, Y, N, N },
    { GLX(EXT_visual_rating),           VER(0,0), Y, Y, N, N },
diff --git a/src/glx/glxextensions.h b/src/glx/glxextensions.h
index d73128bd0e..07cd3af0ff 100644
--- a/src/glx/glxextensions.h
+++ b/src/glx/glxextensions.h
@@ -50,6 +50,7 @@  enum
    EXT_fbconfig_packed_float_bit,
    EXT_framebuffer_sRGB_bit,
    EXT_import_context_bit,
+   EXT_no_config_context_bit,
    EXT_texture_from_pixmap_bit,
    EXT_visual_info_bit,
    EXT_visual_rating_bit,
diff --git a/src/glx/tests/create_context_unittest.cpp b/src/glx/tests/create_context_unittest.cpp
index a2590589db..d19271b47e 100644
--- a/src/glx/tests/create_context_unittest.cpp
+++ b/src/glx/tests/create_context_unittest.cpp
@@ -172,15 +172,6 @@  TEST_F(glXCreateContextAttribARB_test, NULL_display_returns_None)
    EXPECT_EQ(0, fake_glx_context::contexts_allocated);
 }
 
-TEST_F(glXCreateContextAttribARB_test, NULL_fbconfig_returns_None)
-{
-   GLXContext ctx =
-      glXCreateContextAttribsARB(this->dpy, NULL, 0, False, NULL);
-
-   EXPECT_EQ(None, ctx);
-   EXPECT_EQ(0, fake_glx_context::contexts_allocated);
-}
-
 TEST_F(glXCreateContextAttribARB_test, NULL_screen_returns_None)
 {
    delete psc;

Comments

On 5 December 2017 at 21:22, Adam Jackson <ajax@redhat.com> wrote:
> This more or less ports EGL_KHR_no_config_context to GLX.
>
> v2: Enable the extension only for those backends that support it.
> v3: Fix glvnd path and dri2_convert_glx_attribs()
> v4: Screeching signedness correctness, and disable a now
>     inappropriate test.
>
> Khronos: https://github.com/KhronosGroup/OpenGL-Registry/pull/102
> Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
> Signed-off-by: Adam Jackson <ajax@redhat.com>
> Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

-Emil
On 12/05/2017 02:22 PM, Adam Jackson wrote:
> This more or less ports EGL_KHR_no_config_context to GLX.
>
> v2: Enable the extension only for those backends that support it.
> v3: Fix glvnd path and dri2_convert_glx_attribs()
> v4: Screeching signedness correctness, and disable a now
>      inappropriate test.
>
> diff --git a/src/glx/g_glxglvnddispatchfuncs.c b/src/glx/g_glxglvnddispatchfuncs.c
> index 56d894eda7..04f6d8263a 100644
> --- a/src/glx/g_glxglvnddispatchfuncs.c
> +++ b/src/glx/g_glxglvnddispatchfuncs.c
> @@ -164,7 +164,19 @@ static GLXContext dispatch_CreateContextAttribsARB(Display *dpy,
>       __GLXvendorInfo *dd;
>       GLXContext ret;
>   
> -    dd = GetDispatchFromFBConfig(dpy, config);
> +    if (config) {
> +       dd = GetDispatchFromFBConfig(dpy, config);
> +    } else if (attrib_list) {
> +       int i, screen;
> +
> +       for (i = 0; attrib_list[i * 2] != None; i++) {
> +          if (attrib_list[i * 2] == GLX_SCREEN) {
> +             screen = attrib_list[i * 2 + 1];
> +             dd = GetDispatchFromDrawable(dpy, RootWindow(dpy, screen));
> +             break;
> +          }
> +       }
> +    }
>       if (dd == NULL)
>           return None;
>   
>

That should just look up the vendor by screen number, not based on the 
root window. Calling GetDispatchFromDrawable instead of 
(__VND->getDynDispatch(dpy, screen)) requires an extra round trip to the 
server.