Mesa (master): meta: remove call to _meta_in_progress(), fix multisample enable/disable

[Paul Berry]

Module: Mesa
Branch: master
Commit: 055093e33fc90705c429e948caefedf0e0fb82af
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=055093e33fc90705c429e948caefedf0e0fb82af

Author: Brian Paul <brianp at vmware.com>
Date:   Thu Aug 30 08:45:13 2012 -0600

meta: remove call to _meta_in_progress(), fix multisample enable/disable

This partially reverts d638da23d2ec2e9c52655b1ea138249e7f8bcccb.

With gallium the meta code is not always built so the call to
_meta_in_progress() was unresolved.  Simply special-case the
GL_MULTISAMPLE case in the meta code.  There might be other special
cases in the future given all the differences between legacy GL,
core GL, GLES, etc.

Fixes https://bugs.freedesktop.org/show_bug.cgi?id=54234
and https://bugs.freedesktop.org/show_bug.cgi?id=54239

v2 (Paul Berry <stereotype441 at gmail.com>): keep _meta_in_progress
function, since it's needed by the i965 driver, but don't call it from
core mesa.

Signed-off-by: Brian Paul <brianp at vmware.com>

---

 src/mesa/drivers/common/meta.c |   33 +++++++++++++++++++++++++++++++--
 src/mesa/main/enable.c         |    7 +------
 2 files changed, 32 insertions(+), 8 deletions(-)

diff --git a/src/mesa/drivers/common/meta.c b/src/mesa/drivers/common/meta.c
index 3a34b1e..4b448fe 100644
--- a/src/mesa/drivers/common/meta.c
+++ b/src/mesa/drivers/common/meta.c
@@ -438,6 +438,35 @@ _mesa_meta_free(struct gl_context *ctx)
 
 
 /**
+ * This is an alternative to _mesa_set_enable() to handle some special cases.
+ * See comments inside.
+ */
+static void
+meta_set_enable(struct gl_context *ctx, GLenum cap, GLboolean state)
+{
+   switch (cap) {
+   case GL_MULTISAMPLE:
+      /* We need to enable/disable multisample when using GLES but this enum
+       * is not supported there.
+       */
+      if (ctx->Multisample.Enabled == state)
+         return;
+      FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);
+      ctx->Multisample.Enabled = state;
+      break;
+   default:
+      _mesa_problem(ctx, "Unexpected cap in _meta_set_enable()");
+      return;
+   }
+
+   if (ctx->Driver.Enable) {
+      ctx->Driver.Enable(ctx, cap, state);
+   }
+}
+
+
+
+/**
  * Enter meta state.  This is like a light-weight version of glPushAttrib
  * but it also resets most GL state back to default values.
  *
@@ -755,7 +784,7 @@ _mesa_meta_begin(struct gl_context *ctx, GLbitfield state)
    if (state & MESA_META_MULTISAMPLE) {
       save->MultisampleEnabled = ctx->Multisample.Enabled;
       if (ctx->Multisample.Enabled)
-         _mesa_set_enable(ctx, GL_MULTISAMPLE, GL_FALSE);
+         meta_set_enable(ctx, GL_MULTISAMPLE, GL_FALSE);
    }
 
    /* misc */
@@ -1057,7 +1086,7 @@ _mesa_meta_end(struct gl_context *ctx)
 
    if (state & MESA_META_MULTISAMPLE) {
       if (ctx->Multisample.Enabled != save->MultisampleEnabled)
-         _mesa_set_enable(ctx, GL_MULTISAMPLE, save->MultisampleEnabled);
+         meta_set_enable(ctx, GL_MULTISAMPLE, save->MultisampleEnabled);
    }
 
    /* misc */
diff --git a/src/mesa/main/enable.c b/src/mesa/main/enable.c
index b713f5f..14eea53 100644
--- a/src/mesa/main/enable.c
+++ b/src/mesa/main/enable.c
@@ -765,13 +765,8 @@ _mesa_set_enable(struct gl_context *ctx, GLenum cap, GLboolean state)
 
       /* GL_ARB_multisample */
       case GL_MULTISAMPLE_ARB:
-         /* Technically speaking, this should not be allowed for OpenGL ES 2.0
-          * or 3.0.  However, meta really needs it.
-          */
-         if (!_mesa_meta_in_progress(ctx) && !_mesa_is_desktop_gl(ctx)
-             && ctx->API != API_OPENGLES)
+         if (!_mesa_is_desktop_gl(ctx) && ctx->API != API_OPENGLES)
             goto invalid_enum_error;
-
          if (ctx->Multisample.Enabled == state)
             return;
          FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);