diff options
Diffstat (limited to 'src/mesa/drivers/dri/i965/brw_lower_unnormalized_offset.cpp')
-rw-r--r-- | src/mesa/drivers/dri/i965/brw_lower_unnormalized_offset.cpp | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_lower_unnormalized_offset.cpp b/src/mesa/drivers/dri/i965/brw_lower_unnormalized_offset.cpp new file mode 100644 index 0000000..0581e05 --- /dev/null +++ b/src/mesa/drivers/dri/i965/brw_lower_unnormalized_offset.cpp @@ -0,0 +1,78 @@ +/* + * 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_unnormalized_offset.cpp + * + * IR lower pass to convert a texture offset into an adjusted coordinate, + * for use with unnormalized coordinates. At least the gather4* messages + * on Ivybridge and Haswell make a mess with nonzero offsets. + * + * \author Chris Forbes <chrisf@ijw.co.nz> + */ + +#include "glsl/glsl_types.h" +#include "glsl/ir.h" +#include "glsl/ir_builder.h" + +using namespace ir_builder; + +class brw_lower_unnormalized_offset_visitor : public ir_hierarchical_visitor { +public: + brw_lower_unnormalized_offset_visitor() + { + progress = false; + } + + ir_visitor_status visit_leave(ir_texture *ir); + + bool progress; +}; + +ir_visitor_status +brw_lower_unnormalized_offset_visitor::visit_leave(ir_texture *ir) +{ + if (ir->sampler->type->sampler_dimensionality != GLSL_SAMPLER_DIM_RECT || + !ir->offset || ir->op != ir_tg4) + return visit_continue; + + ir->coordinate = add(ir->coordinate, i2f(ir->offset)); + ir->offset = NULL; + + progress = true; + return visit_continue; +} + +extern "C" { + +bool +brw_do_lower_unnormalized_offset(exec_list *instructions) +{ + brw_lower_unnormalized_offset_visitor v; + + visit_list_elements(&v, instructions); + + return v.progress; +} + +} |