Alyssa Rosenzweig
2ba48eea88
Sleepy code deletion mood. Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com> Reviewed-by: Faith Ekstrand <faith.ekstrand@collabora.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21750>
87 lines
3.1 KiB
C
87 lines
3.1 KiB
C
/*
|
|
* Copyright © 2019 Raspberry Pi Ltd
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include "nir_builder.h"
|
|
|
|
/** @file nir_lower_point_size.c
|
|
*
|
|
* The OpenGL spec requires that implementations clamp gl_PointSize to an
|
|
* implementation-dependant point size range. The OpenGL ES 3.0 spec further
|
|
* requires that this range must match GL_ALIASED_POINT_SIZE_RANGE.
|
|
* Some hardware such as V3D don't clamp to a valid range automatically so
|
|
* the driver must clamp the point size written by the shader manually to a
|
|
* valid range.
|
|
*/
|
|
static bool
|
|
lower_point_size_instr(nir_builder *b, nir_instr *instr, void *data)
|
|
{
|
|
float *minmax = (float *)data;
|
|
|
|
if (instr->type != nir_instr_type_intrinsic)
|
|
return false;
|
|
|
|
nir_intrinsic_instr *intr = nir_instr_as_intrinsic(instr);
|
|
if (intr->intrinsic != nir_intrinsic_store_deref)
|
|
return false;
|
|
|
|
nir_deref_instr *deref = nir_src_as_deref(intr->src[0]);
|
|
nir_variable *var = nir_deref_instr_get_variable(deref);
|
|
if (var->data.location != VARYING_SLOT_PSIZ)
|
|
return false;
|
|
|
|
b->cursor = nir_before_instr(instr);
|
|
|
|
assert(intr->src[1].is_ssa);
|
|
assert(intr->src[1].ssa->num_components == 1);
|
|
nir_ssa_def *psiz = intr->src[1].ssa;
|
|
|
|
if (minmax[0] > 0.0f)
|
|
psiz = nir_fmax(b, psiz, nir_imm_float(b, minmax[0]));
|
|
|
|
if (minmax[1] > 0.0f)
|
|
psiz = nir_fmin(b, psiz, nir_imm_float(b, minmax[1]));
|
|
|
|
nir_instr_rewrite_src(instr, &intr->src[1], nir_src_for_ssa(psiz));
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Clamps gl_PointSize to the range [min, max]. If either min or max are not
|
|
* greater than 0 then no clamping is done for that side of the range.
|
|
*/
|
|
bool
|
|
nir_lower_point_size(nir_shader *s, float min, float max)
|
|
{
|
|
assert(s->info.stage != MESA_SHADER_FRAGMENT &&
|
|
s->info.stage != MESA_SHADER_COMPUTE);
|
|
|
|
assert(min > 0.0f || max > 0.0f);
|
|
assert(min <= 0.0f || max <= 0.0f || min <= max);
|
|
|
|
float minmax[] = {min, max};
|
|
return nir_shader_instructions_pass(s, lower_point_size_instr,
|
|
nir_metadata_block_index |
|
|
nir_metadata_dominance, minmax);
|
|
}
|