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authormarha <marha@users.sourceforge.net>2014-03-04 12:18:13 +0100
committermarha <marha@users.sourceforge.net>2014-03-04 12:23:48 +0100
commit45392e4a0642880b569ea5d4a350cdc395a2c7db (patch)
treec3c2a49de903a18c3f8e1bf79684c29337ebcf7c /mesalib/src/glsl/lower_offset_array.cpp
parent5ec0616d4e3c4c6095f4975abbe9c21e5b6af967 (diff)
parent321c01267ae1c446f1bd22b642567fcafa016c02 (diff)
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Merge remote-tracking branch 'origin/released'
* origin/released: libX11 libxcb mesa xserver xcb-proto xkeyboard-config git update 4 Mar 2014 Conflicts: mesalib/src/mapi/glapi/glapi.h mesalib/src/mapi/glapi/glthread.c mesalib/src/mesa/drivers/dri/common/dri_util.c mesalib/src/mesa/main/bufferobj.c xorg-server/dix/dispatch.c xorg-server/hw/xwin/glx/gen_gl_wrappers.py xorg-server/hw/xwin/winmultiwindowwm.c
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diff --git a/mesalib/src/glsl/lower_offset_array.cpp b/mesalib/src/glsl/lower_offset_array.cpp
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+/*
+ * Copyright © 2013 Intel Corporation
+ *
+ * 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 (including the next
+ * paragraph) 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
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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.
+ */
+
+/**
+ * \file brw_lower_offset_array.cpp
+ *
+ * IR lower pass to decompose ir_texture ir_tg4 with an array of offsets
+ * into four ir_tg4s with a single ivec2 offset, select the .w component of each,
+ * and return those four values packed into a gvec4.
+ *
+ * \author Chris Forbes <chrisf@ijw.co.nz>
+ */
+
+#include "glsl_types.h"
+#include "ir.h"
+#include "ir_builder.h"
+#include "ir_optimization.h"
+#include "ir_rvalue_visitor.h"
+
+using namespace ir_builder;
+
+class brw_lower_offset_array_visitor : public ir_rvalue_visitor {
+public:
+ brw_lower_offset_array_visitor()
+ {
+ progress = false;
+ }
+
+ void handle_rvalue(ir_rvalue **rv);
+
+ bool progress;
+};
+
+void
+brw_lower_offset_array_visitor::handle_rvalue(ir_rvalue **rv)
+{
+ if (*rv == NULL || (*rv)->ir_type != ir_type_texture)
+ return;
+
+ ir_texture *ir = (ir_texture *) *rv;
+ if (ir->op != ir_tg4 || !ir->offset || !ir->offset->type->is_array())
+ return;
+
+ void *mem_ctx = ralloc_parent(ir);
+
+ ir_variable *var = new (mem_ctx) ir_variable(ir->type, "result", ir_var_auto);
+ base_ir->insert_before(var);
+
+ for (int i = 0; i < 4; i++) {
+ ir_texture *tex = ir->clone(mem_ctx, NULL);
+ tex->offset = new (mem_ctx) ir_dereference_array(tex->offset,
+ new (mem_ctx) ir_constant(i));
+
+ base_ir->insert_before(assign(var, swizzle_w(tex), 1 << i));
+ }
+
+ *rv = new (mem_ctx) ir_dereference_variable(var);
+
+ progress = true;
+}
+
+bool
+lower_offset_arrays(exec_list *instructions)
+{
+ brw_lower_offset_array_visitor v;
+
+ visit_list_elements(&v, instructions);
+
+ return v.progress;
+}