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68d22b5a2a
Reviewed-by: Christoph Pillmayer <christoph.pillmayer@arm.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39367>
54 lines
1.7 KiB
C
54 lines
1.7 KiB
C
/*
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* Copyright 2025 Raspberry Pi Ltd
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* SPDX-License-Identifier: MIT
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*/
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#include "util/format/u_format.h"
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#include "compiler/nir/nir_builder.h"
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#include "compiler/nir/nir_format_convert.h"
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#include "compiler/nir/nir_lower_blend.h"
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#include "v3d_compiler.h"
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bool
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v3d_nir_lower_blend(nir_shader *nir, struct v3d_compile *c)
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{
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if (!c->fs_key->software_blend)
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return false;
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nir_lower_blend_options options = {
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/* logic op is handled elsewhere in the compiler */
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.logicop_enable = false,
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.scalar_blend_const = true,
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};
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bool lower_blend = false;
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for (unsigned rt = 0; rt < V3D_MAX_DRAW_BUFFERS; rt++) {
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if (!(c->fs_key->cbufs & (1 << rt))) {
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static const nir_lower_blend_channel replace = {
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.func = PIPE_BLEND_ADD,
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.src_factor = PIPE_BLENDFACTOR_ONE,
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.dst_factor = PIPE_BLENDFACTOR_ZERO,
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};
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options.rt[rt].rgb = replace;
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options.rt[rt].alpha = replace;
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continue;
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}
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lower_blend = true;
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/* Colour write mask is handled by the hardware. */
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options.rt[rt].colormask = 0xf;
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options.rt[rt].format = c->fs_key->color_fmt[rt].format;
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options.rt[rt].rgb.func = c->fs_key->blend[rt].rgb_func;
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options.rt[rt].alpha.func = c->fs_key->blend[rt].alpha_func;
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options.rt[rt].rgb.dst_factor = c->fs_key->blend[rt].rgb_dst_factor;
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options.rt[rt].alpha.dst_factor = c->fs_key->blend[rt].alpha_dst_factor;
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options.rt[rt].rgb.src_factor = c->fs_key->blend[rt].rgb_src_factor;
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options.rt[rt].alpha.src_factor = c->fs_key->blend[rt].alpha_src_factor;
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}
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return lower_blend && nir_lower_blend(nir, &options);
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}
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