4 files changed, 44 insertions, 21 deletions

diff --git a/mesalib/src/mesa/main/api_validate.c b/mesalib/src/mesa/main/api_validate.c
index 243bb89d1..002992186 100644
--- a/mesalib/src/mesa/main/api_validate.c
+++ b/mesalib/src/mesa/main/api_validate.c
@@ -402,9 +402,8 @@ _mesa_validate_DrawElements(struct gl_context *ctx,
       return GL_FALSE;
    }
 
-   if (count <= 0) {
-      if (count < 0)
-	 _mesa_error(ctx, GL_INVALID_VALUE, "glDrawElements(count)" );
+   if (count < 0) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glDrawElements(count)" );
       return GL_FALSE;
    }
 
@@ -436,6 +435,9 @@ _mesa_validate_DrawElements(struct gl_context *ctx,
    if (!check_index_bounds(ctx, count, type, indices, basevertex))
       return GL_FALSE;
 
+   if (count == 0)
+      return GL_FALSE;
+
    return GL_TRUE;
 }
 
@@ -456,10 +458,9 @@ _mesa_validate_MultiDrawElements(struct gl_context *ctx,
    FLUSH_CURRENT(ctx, 0);
 
    for (i = 0; i < primcount; i++) {
-      if (count[i] <= 0) {
-         if (count[i] < 0)
-            _mesa_error(ctx, GL_INVALID_VALUE,
-                        "glMultiDrawElements(count)" );
+      if (count[i] < 0) {
+         _mesa_error(ctx, GL_INVALID_VALUE,
+                     "glMultiDrawElements(count)" );
          return GL_FALSE;
       }
    }
@@ -531,9 +532,8 @@ _mesa_validate_DrawRangeElements(struct gl_context *ctx, GLenum mode,
       return GL_FALSE;
    }
 
-   if (count <= 0) {
-      if (count < 0)
-	 _mesa_error(ctx, GL_INVALID_VALUE, "glDrawRangeElements(count)" );
+   if (count < 0) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glDrawRangeElements(count)" );
       return GL_FALSE;
    }
 
@@ -570,6 +570,9 @@ _mesa_validate_DrawRangeElements(struct gl_context *ctx, GLenum mode,
    if (!check_index_bounds(ctx, count, type, indices, basevertex))
       return GL_FALSE;
 
+   if (count == 0)
+      return GL_FALSE;
+
    return GL_TRUE;
 }
 
@@ -587,9 +590,8 @@ _mesa_validate_DrawArrays(struct gl_context *ctx,
       = ctx->TransformFeedback.CurrentObject;
    FLUSH_CURRENT(ctx, 0);
 
-   if (count <= 0) {
-      if (count < 0)
-         _mesa_error(ctx, GL_INVALID_VALUE, "glDrawArrays(count)" );
+   if (count < 0) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glDrawArrays(count)" );
       return GL_FALSE;
    }
 
@@ -628,6 +630,9 @@ _mesa_validate_DrawArrays(struct gl_context *ctx,
       xfb_obj->GlesRemainingPrims -= prim_count;
    }
 
+   if (count == 0)
+      return GL_FALSE;
+
    return GL_TRUE;
 }
 
@@ -640,10 +645,9 @@ _mesa_validate_DrawArraysInstanced(struct gl_context *ctx, GLenum mode, GLint fi
       = ctx->TransformFeedback.CurrentObject;
    FLUSH_CURRENT(ctx, 0);
 
-   if (count <= 0) {
-      if (count < 0)
-         _mesa_error(ctx, GL_INVALID_VALUE,
-                     "glDrawArraysInstanced(count=%d)", count);
+   if (count < 0) {
+      _mesa_error(ctx, GL_INVALID_VALUE,
+                  "glDrawArraysInstanced(count=%d)", count);
       return GL_FALSE;
    }
 
@@ -696,6 +700,9 @@ _mesa_validate_DrawArraysInstanced(struct gl_context *ctx, GLenum mode, GLint fi
       xfb_obj->GlesRemainingPrims -= prim_count;
    }
 
+   if (count == 0)
+      return GL_FALSE;
+
    return GL_TRUE;
 }
 
@@ -721,10 +728,9 @@ _mesa_validate_DrawElementsInstanced(struct gl_context *ctx,
       return GL_FALSE;
    }
 
-   if (count <= 0) {
-      if (count < 0)
-	 _mesa_error(ctx, GL_INVALID_VALUE,
-                     "glDrawElementsInstanced(count=%d)", count);
+   if (count < 0) {
+      _mesa_error(ctx, GL_INVALID_VALUE,
+                  "glDrawElementsInstanced(count=%d)", count);
       return GL_FALSE;
    }
 
@@ -761,6 +767,9 @@ _mesa_validate_DrawElementsInstanced(struct gl_context *ctx,
          return GL_FALSE;
    }
 
+   if (count == 0)
+      return GL_FALSE;
+
    if (!check_index_bounds(ctx, count, type, indices, basevertex))
       return GL_FALSE;
 
diff --git a/mesalib/src/mesa/program/ir_to_mesa.cpp b/mesalib/src/mesa/program/ir_to_mesa.cpp
index f612f41ba..340a4497f 100644
--- a/mesalib/src/mesa/program/ir_to_mesa.cpp
+++ b/mesalib/src/mesa/program/ir_to_mesa.cpp
@@ -1492,6 +1492,7 @@ ir_to_mesa_visitor::visit(ir_expression *ir)
 
    case ir_binop_vector_extract:
    case ir_binop_bfm:
+   case ir_triop_fma:
    case ir_triop_bfi:
    case ir_triop_bitfield_extract:
    case ir_triop_vector_insert:
diff --git a/mesalib/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/mesalib/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index 4e29e4500..37779d4e5 100644
--- a/mesalib/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/mesalib/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -1972,6 +1972,7 @@ glsl_to_tgsi_visitor::visit(ir_expression *ir)
    case ir_unop_find_msb:
    case ir_unop_find_lsb:
    case ir_binop_bfm:
+   case ir_triop_fma:
    case ir_triop_bfi:
    case ir_triop_bitfield_extract:
    case ir_quadop_bitfield_insert:
diff --git a/mesalib/src/mesa/vbo/vbo_exec_array.c b/mesalib/src/mesa/vbo/vbo_exec_array.c
index bd05cd0c3..1670409d4 100644
--- a/mesalib/src/mesa/vbo/vbo_exec_array.c
+++ b/mesalib/src/mesa/vbo/vbo_exec_array.c
@@ -1334,6 +1334,16 @@ vbo_validated_multidrawelements(struct gl_context *ctx, GLenum mode,
       }
    }
 
+   /* Draw primitives individually if one count is zero, so we can easily skip
+    * that primitive.
+    */
+   for (i = 0; i < primcount; i++) {
+      if (count[i] == 0) {
+         fallback = GL_TRUE;
+         break;
+      }
+   }
+
    /* If the index buffer isn't in a VBO, then treating the application's
     * subranges of the index buffer as one large index buffer may lead to
     * us reading unmapped memory.
@@ -1370,6 +1380,8 @@ vbo_validated_multidrawelements(struct gl_context *ctx, GLenum mode,
    } else {
       /* render one prim at a time */
       for (i = 0; i < primcount; i++) {
+	 if (count[i] == 0)
+	    continue;
 	 ib.count = count[i];
 	 ib.type = type;
 	 ib.obj = ctx->Array.ArrayObj->ElementArrayBufferObj;