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-rw-r--r--src/mesa/drivers/dri/i965/Makefile1
-rw-r--r--src/mesa/drivers/dri/i965/brw_context.h2
-rw-r--r--src/mesa/drivers/dri/i965/brw_cubemap_normalize.cpp110
-rw-r--r--src/mesa/drivers/dri/i965/brw_fs.cpp1
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;