Imported nx-X11-3.1.0-1.tar.gznx-X11/3.1.0-1

Summary: Imported nx-X11-3.1.0-1.tar.gz
Keywords:

Imported nx-X11-3.1.0-1.tar.gz
into Git repository

1 files changed, 238 insertions, 0 deletions

diff --git a/nx-X11/extras/Mesa/src/mesa/main/api_validate.c b/nx-X11/extras/Mesa/src/mesa/main/api_validate.c
new file mode 100644
index 000000000..d1c8f42e7
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/main/api_validate.c
@@ -0,0 +1,238 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  6.1
+ *
+ * Copyright (C) 1999-2003  Brian Paul   All Rights Reserved.
+ *
+ * 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
+ * BRIAN PAUL 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 "glheader.h"
+#include "api_validate.h"
+#include "context.h"
+#include "imports.h"
+#include "mtypes.h"
+#include "state.h"
+
+
+GLboolean
+_mesa_validate_DrawElements(GLcontext *ctx,
+			    GLenum mode, GLsizei count, GLenum type,
+			    const GLvoid *indices)
+{
+   ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx,  GL_FALSE);
+
+   if (count <= 0) {
+      if (count < 0)
+	 _mesa_error(ctx, GL_INVALID_VALUE, "glDrawElements(count)" );
+      return GL_FALSE;
+   }
+
+   if (mode > GL_POLYGON) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glDrawElements(mode)" );
+      return GL_FALSE;
+   }
+
+   if (type != GL_UNSIGNED_INT &&
+       type != GL_UNSIGNED_BYTE &&
+       type != GL_UNSIGNED_SHORT)
+   {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glDrawElements(type)" );
+      return GL_FALSE;
+   }
+
+   if (ctx->NewState)
+      _mesa_update_state(ctx);
+
+   /* Always need vertex positions */
+   if (!ctx->Array.Vertex.Enabled
+       && !(ctx->VertexProgram._Enabled && ctx->Array.VertexAttrib[0].Enabled))
+      return GL_FALSE;
+
+   /* Vertex buffer object tests */
+   if (ctx->Array.ElementArrayBufferObj->Name) {
+      GLuint indexBytes;
+
+      /* use indices in the buffer object */
+      if (!ctx->Array.ElementArrayBufferObj->Data) {
+         _mesa_warning(ctx, "DrawElements with empty vertex elements buffer!");
+         return GL_FALSE;
+      }
+
+      /* make sure count doesn't go outside buffer bounds */
+      if (type == GL_UNSIGNED_INT) {
+         indexBytes = count * sizeof(GLuint);
+      }
+      else if (type == GL_UNSIGNED_BYTE) {
+         indexBytes = count * sizeof(GLubyte);
+      }
+      else {
+         ASSERT(type == GL_UNSIGNED_SHORT);
+         indexBytes = count * sizeof(GLushort);
+      }
+
+      if ((GLubyte *) indices + indexBytes >
+          ctx->Array.ElementArrayBufferObj->Data +
+          ctx->Array.ElementArrayBufferObj->Size) {
+         _mesa_warning(ctx, "glDrawElements index out of buffer bounds");
+         return GL_FALSE;
+      }
+
+      /* Actual address is the sum of pointers.  Indices may be used below. */
+      if (ctx->Const.CheckArrayBounds) {
+         indices = (const GLvoid *)
+            ADD_POINTERS(ctx->Array.ElementArrayBufferObj->Data,
+                         (const GLubyte *) indices);
+      }
+   }
+
+   if (ctx->Const.CheckArrayBounds) {
+      /* find max array index */
+      GLuint max = 0;
+      GLint i;
+      if (type == GL_UNSIGNED_INT) {
+         for (i = 0; i < count; i++)
+            if (((GLuint *) indices)[i] > max)
+               max = ((GLuint *) indices)[i];
+      }
+      else if (type == GL_UNSIGNED_SHORT) {
+         for (i = 0; i < count; i++)
+            if (((GLushort *) indices)[i] > max)
+               max = ((GLushort *) indices)[i];
+      }
+      else {
+         ASSERT(type == GL_UNSIGNED_BYTE);
+         for (i = 0; i < count; i++)
+            if (((GLubyte *) indices)[i] > max)
+               max = ((GLubyte *) indices)[i];
+      }
+      if (max >= ctx->Array._MaxElement) {
+         /* the max element is out of bounds of one or more enabled arrays */
+         return GL_FALSE;
+      }
+   }
+
+   return GL_TRUE;
+}
+
+
+GLboolean
+_mesa_validate_DrawRangeElements(GLcontext *ctx, GLenum mode,
+				 GLuint start, GLuint end,
+				 GLsizei count, GLenum type,
+				 const GLvoid *indices)
+{
+   ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
+
+   if (count <= 0) {
+      if (count < 0)
+	 _mesa_error(ctx, GL_INVALID_VALUE, "glDrawRangeElements(count)" );
+      return GL_FALSE;
+   }
+
+   if (mode > GL_POLYGON) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glDrawRangeElements(mode)" );
+      return GL_FALSE;
+   }
+
+   if (end < start) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glDrawRangeElements(end<start)");
+      return GL_FALSE;
+   }
+
+   if (type != GL_UNSIGNED_INT &&
+       type != GL_UNSIGNED_BYTE &&
+       type != GL_UNSIGNED_SHORT) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glDrawRangeElements(type)" );
+      return GL_FALSE;
+   }
+
+   if (ctx->NewState)
+      _mesa_update_state(ctx);
+
+   /* Always need vertex positions */
+   if (!ctx->Array.Vertex.Enabled
+       && !(ctx->VertexProgram._Enabled && ctx->Array.VertexAttrib[0].Enabled))
+      return GL_FALSE;
+
+   if (ctx->Const.CheckArrayBounds) {
+      /* Find max array index.
+       * We don't trust the user's start and end values.
+       */
+      GLuint max = 0;
+      GLint i;
+      if (type == GL_UNSIGNED_INT) {
+         for (i = 0; i < count; i++)
+            if (((GLuint *) indices)[i] > max)
+               max = ((GLuint *) indices)[i];
+      }
+      else if (type == GL_UNSIGNED_SHORT) {
+         for (i = 0; i < count; i++)
+            if (((GLushort *) indices)[i] > max)
+               max = ((GLushort *) indices)[i];
+      }
+      else {
+         ASSERT(type == GL_UNSIGNED_BYTE);
+         for (i = 0; i < count; i++)
+            if (((GLubyte *) indices)[i] > max)
+               max = ((GLubyte *) indices)[i];
+      }
+      if (max >= ctx->Array._MaxElement) {
+         /* the max element is out of bounds of one or more enabled arrays */
+         return GL_FALSE;
+      }
+   }
+
+   return GL_TRUE;
+}
+
+
+/**
+ * Called from the tnl module to error check the function parameters and
+ * verify that we really can draw something.
+ */
+GLboolean
+_mesa_validate_DrawArrays(GLcontext *ctx,
+			  GLenum mode, GLint start, GLsizei count)
+{
+   ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
+
+   if (count < 0) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glDrawArrays(count)" );
+      return GL_FALSE;
+   }
+
+   if (mode > GL_POLYGON) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glDrawArrays(mode)" );
+      return GL_FALSE;
+   }
+
+   if (ctx->NewState)
+      _mesa_update_state(ctx);
+
+   /* Always need vertex positions */
+   if (!ctx->Array.Vertex.Enabled && !ctx->Array.VertexAttrib[0].Enabled)
+      return GL_FALSE;
+
+   if (ctx->Const.CheckArrayBounds) {
+      if (start + count > (GLint) ctx->Array._MaxElement)
+         return GL_FALSE;
+   }
+
+   return GL_TRUE;
+}