-/**
- * Compute the index of the last array element that can be safely accessed
- * in a vertex array. We can really only do this when the array lives in
- * a VBO.
- * The array->_MaxElement field will be updated.
- * Later in glDrawArrays/Elements/etc we can do some bounds checking.
- */
-static void
-compute_max_element(struct gl_client_array *array)
-{
- assert(array->Enabled);
- if (array->BufferObj->Name) {
- GLsizeiptrARB offset = (GLsizeiptrARB) array->Ptr;
- GLsizeiptrARB obj_size = (GLsizeiptrARB) array->BufferObj->Size;
-
- if (offset < obj_size) {
- array->_MaxElement = (obj_size - offset +
- array->StrideB -
- array->_ElementSize) / array->StrideB;
- } else {
- array->_MaxElement = 0;
- }
- }
- else {
- /* user-space array, no idea how big it is */
- array->_MaxElement = 2 * 1000 * 1000 * 1000; /* just a big number */
- }
-}
-
-
-/**
- * Helper for update_arrays().
- * \return min(current min, array->_MaxElement).
- */
-static GLuint
-update_min(GLuint min, struct gl_client_array *array)
-{
- compute_max_element(array);
- return MIN2(min, array->_MaxElement);
-}
-
-
-/**
- * Update ctx->Array._MaxElement (the max legal index into all enabled arrays).
- * Need to do this upon new array state or new buffer object state.
- */
-static void
-update_arrays( GLcontext *ctx )
-{
- struct gl_array_object *arrayObj = ctx->Array.ArrayObj;
- GLuint i, min = ~0;
-
- /* find min of _MaxElement values for all enabled arrays */
-
- /* 0 */
- if (ctx->VertexProgram._Current
- && arrayObj->VertexAttrib[VERT_ATTRIB_POS].Enabled) {
- min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_POS]);
- }
- else if (arrayObj->Vertex.Enabled) {
- min = update_min(min, &arrayObj->Vertex);
- }
-
- /* 1 */
- if (ctx->VertexProgram._Enabled
- && arrayObj->VertexAttrib[VERT_ATTRIB_WEIGHT].Enabled) {
- min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_WEIGHT]);
- }
- /* no conventional vertex weight array */
-
- /* 2 */
- if (ctx->VertexProgram._Enabled
- && arrayObj->VertexAttrib[VERT_ATTRIB_NORMAL].Enabled) {
- min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_NORMAL]);
- }
- else if (arrayObj->Normal.Enabled) {
- min = update_min(min, &arrayObj->Normal);
- }
-
- /* 3 */
- if (ctx->VertexProgram._Enabled
- && arrayObj->VertexAttrib[VERT_ATTRIB_COLOR0].Enabled) {
- min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_COLOR0]);
- }
- else if (arrayObj->Color.Enabled) {
- min = update_min(min, &arrayObj->Color);
- }
-
- /* 4 */
- if (ctx->VertexProgram._Enabled
- && arrayObj->VertexAttrib[VERT_ATTRIB_COLOR1].Enabled) {
- min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_COLOR1]);
- }
- else if (arrayObj->SecondaryColor.Enabled) {
- min = update_min(min, &arrayObj->SecondaryColor);
- }
-
- /* 5 */
- if (ctx->VertexProgram._Enabled
- && arrayObj->VertexAttrib[VERT_ATTRIB_FOG].Enabled) {
- min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_FOG]);
- }
- else if (arrayObj->FogCoord.Enabled) {
- min = update_min(min, &arrayObj->FogCoord);
- }
-
- /* 6 */
- if (ctx->VertexProgram._Enabled
- && arrayObj->VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Enabled) {
- min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_COLOR_INDEX]);
- }
- else if (arrayObj->Index.Enabled) {
- min = update_min(min, &arrayObj->Index);
- }
-
- /* 7 */
- if (ctx->VertexProgram._Enabled
- && arrayObj->VertexAttrib[VERT_ATTRIB_EDGEFLAG].Enabled) {
- min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_EDGEFLAG]);
- }
-
- /* 8..15 */
- for (i = VERT_ATTRIB_TEX0; i <= VERT_ATTRIB_TEX7; i++) {
- if (ctx->VertexProgram._Enabled
- && arrayObj->VertexAttrib[i].Enabled) {
- min = update_min(min, &arrayObj->VertexAttrib[i]);
- }
- else if (i - VERT_ATTRIB_TEX0 < ctx->Const.MaxTextureCoordUnits
- && arrayObj->TexCoord[i - VERT_ATTRIB_TEX0].Enabled) {
- min = update_min(min, &arrayObj->TexCoord[i - VERT_ATTRIB_TEX0]);
- }
- }
-
- /* 16..31 */
- if (ctx->VertexProgram._Current) {
- for (i = 0; i < Elements(arrayObj->VertexAttrib); i++) {
- if (arrayObj->VertexAttrib[i].Enabled) {
- min = update_min(min, &arrayObj->VertexAttrib[i]);
- }
- }
- }
-
- if (arrayObj->EdgeFlag.Enabled) {
- min = update_min(min, &arrayObj->EdgeFlag);
- }
-
- /* _MaxElement is one past the last legal array element */
- arrayObj->_MaxElement = min;
-}
-
-