+ _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawTransformFeedback*");
+ return GL_FALSE;
+ }
+
+ if (stream >= ctx->Const.MaxVertexStreams) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glDrawTransformFeedbackStream*(index>=MaxVertexStream)");
+ return GL_FALSE;
+ }
+
+ if (numInstances <= 0) {
+ if (numInstances < 0)
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glDrawTransformFeedback*Instanced(numInstances=%d)",
+ numInstances);
+ return GL_FALSE;
+ }
+
+ if (!check_valid_to_render(ctx, "glDrawTransformFeedback*")) {
+ return GL_FALSE;
+ }
+
+ return GL_TRUE;
+}
+
+static GLboolean
+valid_draw_indirect(struct gl_context *ctx,
+ GLenum mode, const GLvoid *indirect,
+ GLsizei size, const char *name)
+{
+ const GLsizeiptr end = (GLsizeiptr)indirect + size;
+
+ if (!_mesa_valid_prim_mode(ctx, mode, name))
+ return GL_FALSE;
+
+
+ /* From the ARB_draw_indirect specification:
+ * "An INVALID_OPERATION error is generated [...] if <indirect> is no
+ * word aligned."
+ */
+ if ((GLsizeiptr)indirect & (sizeof(GLuint) - 1)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "%s(indirect is not aligned)", name);
+ return GL_FALSE;
+ }
+
+ if (!_mesa_is_bufferobj(ctx->DrawIndirectBuffer)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "%s: no buffer bound to DRAW_INDIRECT_BUFFER", name);
+ return GL_FALSE;
+ }
+
+ if (_mesa_check_disallowed_mapping(ctx->DrawIndirectBuffer)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "%s(DRAW_INDIRECT_BUFFER is mapped)", name);
+ return GL_FALSE;
+ }
+
+ /* From the ARB_draw_indirect specification:
+ * "An INVALID_OPERATION error is generated if the commands source data
+ * beyond the end of the buffer object [...]"
+ */
+ if (ctx->DrawIndirectBuffer->Size < end) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "%s(DRAW_INDIRECT_BUFFER too small)", name);
+ return GL_FALSE;
+ }
+
+ if (!check_valid_to_render(ctx, name))
+ return GL_FALSE;
+
+ return GL_TRUE;
+}
+
+static inline GLboolean
+valid_draw_indirect_elements(struct gl_context *ctx,
+ GLenum mode, GLenum type, const GLvoid *indirect,
+ GLsizeiptr size, const char *name)
+{
+ if (!valid_elements_type(ctx, type, name))
+ return GL_FALSE;
+
+ /*
+ * Unlike regular DrawElementsInstancedBaseVertex commands, the indices
+ * may not come from a client array and must come from an index buffer.
+ * If no element array buffer is bound, an INVALID_OPERATION error is
+ * generated.
+ */
+ if (!_mesa_is_bufferobj(ctx->Array.VAO->IndexBufferObj)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "%s(no buffer bound to GL_ELEMENT_ARRAY_BUFFER)", name);