[Mesa-dev] [RFC PATCH 13/26] mesa: implement sample mask

[Chris Forbes]

Signed-off-by: Chris Forbes <chrisf at ijw.co.nz>
---
 src/mesa/main/enable.c           | 15 +++++++++++++++
 src/mesa/main/get.c              |  9 +++++++++
 src/mesa/main/get_hash_params.py |  2 ++
 src/mesa/main/mtypes.h           |  6 +++++-
 src/mesa/main/multisample.c      | 16 ++++++++++++++--
 5 files changed, 45 insertions(+), 3 deletions(-)

diff --git a/src/mesa/main/enable.c b/src/mesa/main/enable.c
index b48794f..aeeab15 100644
--- a/src/mesa/main/enable.c
+++ b/src/mesa/main/enable.c
@@ -988,6 +988,14 @@ _mesa_set_enable(struct gl_context *ctx, GLenum cap, GLboolean state)
          }
          break;
 
+      /* ARB_texture_multisample */
+      case GL_SAMPLE_MASK:
+         if (ctx->Multisample.SampleMask == state)
+            return;
+         FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);
+         ctx->Multisample.SampleMask = state;
+         break;
+
       default:
          goto invalid_enum_error;
    }
@@ -1556,6 +1564,13 @@ _mesa_IsEnabled( GLenum cap )
 	 CHECK_EXTENSION(OES_EGL_image_external);
          return is_texture_enabled(ctx, TEXTURE_EXTERNAL_BIT);
 
+      /* ARB_texture_multisample */
+      case GL_SAMPLE_MASK:
+         if (!_mesa_is_desktop_gl(ctx))
+            goto invalid_enum_error;
+         CHECK_EXTENSION(ARB_texture_multisample);
+         return ctx->Multisample.SampleMask;
+
       default:
          goto invalid_enum_error;
    }
diff --git a/src/mesa/main/get.c b/src/mesa/main/get.c
index 4c227a8..e15cbf8 100644
--- a/src/mesa/main/get.c
+++ b/src/mesa/main/get.c
@@ -1618,6 +1618,15 @@ find_value_indexed(const char *func, GLenum pname, GLuint index, union value *v)
 	 goto invalid_enum;
       v->value_int = ctx->UniformBufferBindings[index].Size;
       return TYPE_INT;
+
+   /* ARB_texture_multisample / GL3.2 */
+   case GL_SAMPLE_MASK_VALUE:
+      if (index != 0)
+    goto invalid_value;
+      if (!ctx->Extensions.ARB_texture_multisample)
+    goto invalid_enum;
+      v->value_int = ctx->Multisample.SampleMaskValue;
+      return TYPE_INT;
    }
 
  invalid_enum:
diff --git a/src/mesa/main/get_hash_params.py b/src/mesa/main/get_hash_params.py
index 689a7e0..8e053a4 100644
--- a/src/mesa/main/get_hash_params.py
+++ b/src/mesa/main/get_hash_params.py
@@ -644,6 +644,8 @@ descriptor=[
   [ "MAX_COLOR_TEXTURE_SAMPLES", "CONTEXT_INT(Const.MaxColorTextureSamples), extra_ARB_texture_multisample" ],
   [ "MAX_DEPTH_TEXTURE_SAMPLES", "CONTEXT_INT(Const.MaxDepthTextureSamples), extra_ARB_texture_multisample" ],
   [ "MAX_INTEGER_SAMPLES", "CONTEXT_INT(Const.MaxIntegerSamples), extra_ARB_texture_multisample" ],
+  [ "SAMPLE_MASK", "CONTEXT_BOOL(Multisample.SampleMask), extra_ARB_texture_multisample" ],
+  [ "MAX_SAMPLE_MASK_WORDS", "CONST(1), extra_ARB_texture_multisample" ],
 
 
 # GL_ARB_sampler_objects / GL 3.3
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 6f6cdaa..dda6a3e 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -980,7 +980,6 @@ struct gl_list_attrib
    GLuint ListBase;
 };
 
-
 /**
  * Multisample attribute group (GL_MULTISAMPLE_BIT).
  */
@@ -993,6 +992,11 @@ struct gl_multisample_attrib
    GLboolean SampleCoverage;
    GLfloat SampleCoverageValue;
    GLboolean SampleCoverageInvert;
+
+   /* ARB_texture_multisample / GL3.2 additions */
+   GLboolean SampleMask;
+   GLbitfield SampleMaskValue; /* GL spec defines this as an array but >32x MSAA is
+                                 madness */
 };
 
 
diff --git a/src/mesa/main/multisample.c b/src/mesa/main/multisample.c
index ee9e263..d277ff8 100644
--- a/src/mesa/main/multisample.c
+++ b/src/mesa/main/multisample.c
@@ -59,6 +59,10 @@ _mesa_init_multisample(struct gl_context *ctx)
    ctx->Multisample.SampleCoverage = GL_FALSE;
    ctx->Multisample.SampleCoverageValue = 1.0;
    ctx->Multisample.SampleCoverageInvert = GL_FALSE;
+
+   /* ARB_texture_multisample / GL3.2 additions */
+   ctx->Multisample.SampleMask = GL_FALSE;
+   ctx->Multisample.SampleMaskValue = ~(GLbitfield)0;
 }
 
 void GLAPIENTRY
@@ -88,7 +92,15 @@ _mesa_GetMultisamplefv(GLenum pname, GLuint index, GLfloat * val)
 void GLAPIENTRY
 _mesa_SampleMaski(GLuint index, GLbitfield mask)
 {
-   assert(!"Not implemented");
-   // TODO: make this work
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH( ctx );
+
+   if (index != 0) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glSampleMaski(index)");
+      return;
+   }
+
+   ctx->Multisample.SampleMaskValue = mask;
+   ctx->NewState |= _NEW_MULTISAMPLE;
 }
 
-- 
1.8.0.3