diff options
| -rw-r--r-- | src/mesa/drivers/dri/i965/Makefile | 1 | ||||
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_context.h | 2 | ||||
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_cubemap_normalize.cpp | 110 | ||||
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_fs.cpp | 1 |
4 files changed, 114 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/Makefile b/src/mesa/drivers/dri/i965/Makefile index bea48e1313..917d39061d 100644 --- a/src/mesa/drivers/dri/i965/Makefile +++ b/src/mesa/drivers/dri/i965/Makefile @@ -105,6 +105,7 @@ C_SOURCES = \ $(DRIVER_SOURCES) CXX_SOURCES = \ + brw_cubemap_normalize.cpp \ brw_fs.cpp \ brw_fs_channel_expressions.cpp \ brw_fs_vector_splitting.cpp diff --git a/src/mesa/drivers/dri/i965/brw_context.h b/src/mesa/drivers/dri/i965/brw_context.h index 703a7de78d..71e6d8ef89 100644 --- a/src/mesa/drivers/dri/i965/brw_context.h +++ b/src/mesa/drivers/dri/i965/brw_context.h @@ -800,5 +800,7 @@ brw_fragment_program_const(const struct gl_fragment_program *p) return (const struct brw_fragment_program *) p; } +GLboolean brw_do_cubemap_normalize(struct exec_list *instructions); + #endif diff --git a/src/mesa/drivers/dri/i965/brw_cubemap_normalize.cpp b/src/mesa/drivers/dri/i965/brw_cubemap_normalize.cpp new file mode 100644 index 0000000000..35bea68121 --- /dev/null +++ b/src/mesa/drivers/dri/i965/brw_cubemap_normalize.cpp @@ -0,0 +1,110 @@ +/* + * Copyright © 2010 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_cubemap_normalize.cpp + * + * IR lower pass to perform the normalization of the cubemap coordinates to + * have the largest magnitude component be -1.0 or 1.0. + * + * \author Eric Anholt <eric@anholt.net> + */ + +#include "../glsl/glsl_types.h" +#include "../glsl/ir.h" + +class brw_cubemap_normalize_visitor : public ir_hierarchical_visitor { +public: + brw_cubemap_normalize_visitor() + { + progress = false; + } + + ir_visitor_status visit_leave(ir_texture *ir); + + bool progress; +}; + +ir_visitor_status +brw_cubemap_normalize_visitor::visit_leave(ir_texture *ir) +{ + if (ir->sampler->type->sampler_dimensionality != GLSL_SAMPLER_DIM_CUBE) + return visit_continue; + + void *mem_ctx = talloc_parent(ir); + + ir_variable *var = new(mem_ctx) ir_variable(ir->coordinate->type, + "coordinate", ir_var_auto); + base_ir->insert_before(var); + ir_dereference *deref = new(mem_ctx) ir_dereference_variable(var); + ir_assignment *assign = new(mem_ctx) ir_assignment(deref, ir->coordinate, + NULL); + base_ir->insert_before(assign); + + deref = new(mem_ctx) ir_dereference_variable(var); + ir_rvalue *swiz0 = new(mem_ctx) ir_swizzle(deref, 0, 0, 0, 0, 1); + deref = new(mem_ctx) ir_dereference_variable(var); + ir_rvalue *swiz1 = new(mem_ctx) ir_swizzle(deref, 1, 0, 0, 0, 1); + deref = new(mem_ctx) ir_dereference_variable(var); + ir_rvalue *swiz2 = new(mem_ctx) ir_swizzle(deref, 2, 0, 0, 0, 1); + + swiz0 = new(mem_ctx) ir_expression(ir_unop_abs, swiz0->type, swiz0, NULL); + swiz1 = new(mem_ctx) ir_expression(ir_unop_abs, swiz1->type, swiz1, NULL); + swiz2 = new(mem_ctx) ir_expression(ir_unop_abs, swiz2->type, swiz2, NULL); + + ir_expression *expr; + expr = new(mem_ctx) ir_expression(ir_binop_max, + glsl_type::float_type, + swiz0, swiz1); + + expr = new(mem_ctx) ir_expression(ir_binop_max, + glsl_type::float_type, + expr, swiz2); + + expr = new(mem_ctx) ir_expression(ir_unop_rcp, + glsl_type::float_type, + expr, NULL); + + deref = new(mem_ctx) ir_dereference_variable(var); + ir->coordinate = new(mem_ctx) ir_expression(ir_binop_mul, + ir->coordinate->type, + deref, + expr); + + progress = true; + return visit_continue; +} + +extern "C" { + +GLboolean +brw_do_cubemap_normalize(exec_list *instructions) +{ + brw_cubemap_normalize_visitor v; + + visit_list_elements(&v, instructions); + + return v.progress; +} + +} diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp index 0b342c22b0..710eb0bb72 100644 --- a/src/mesa/drivers/dri/i965/brw_fs.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs.cpp @@ -140,6 +140,7 @@ brw_link_shader(GLcontext *ctx, struct gl_shader_program *prog) do_sub_to_add_neg(shader->ir); do_explog_to_explog2(shader->ir); do_lower_texture_projection(shader->ir); + brw_do_cubemap_normalize(shader->ir); do { progress = false; |