}
static nir_ssa_def *
-vc4_blend_channel(nir_builder *b,
- nir_ssa_def **src,
- nir_ssa_def **dst,
- unsigned factor,
- int channel)
+vc4_blend_channel_f(nir_builder *b,
+ nir_ssa_def **src,
+ nir_ssa_def **dst,
+ unsigned factor,
+ int channel)
{
switch(factor) {
case PIPE_BLENDFACTOR_ONE:
}
static nir_ssa_def *
-vc4_blend_func(nir_builder *b, nir_ssa_def *src, nir_ssa_def *dst,
- unsigned func)
+vc4_nir_set_packed_chan(nir_builder *b, nir_ssa_def *src0, nir_ssa_def *src1,
+ int chan)
+{
+ unsigned chan_mask = 0xff << (chan * 8);
+ return nir_ior(b,
+ nir_iand(b, src0, nir_imm_int(b, ~chan_mask)),
+ nir_iand(b, src1, nir_imm_int(b, chan_mask)));
+}
+
+static nir_ssa_def *
+vc4_blend_channel_i(nir_builder *b,
+ nir_ssa_def *src,
+ nir_ssa_def *dst,
+ nir_ssa_def *src_a,
+ nir_ssa_def *dst_a,
+ unsigned factor,
+ int a_chan)
+{
+ switch (factor) {
+ case PIPE_BLENDFACTOR_ONE:
+ return nir_imm_int(b, ~0);
+ case PIPE_BLENDFACTOR_SRC_COLOR:
+ return src;
+ case PIPE_BLENDFACTOR_SRC_ALPHA:
+ return src_a;
+ case PIPE_BLENDFACTOR_DST_ALPHA:
+ return dst_a;
+ case PIPE_BLENDFACTOR_DST_COLOR:
+ return dst;
+ case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE:
+ return vc4_nir_set_packed_chan(b,
+ nir_umin_4x8(b,
+ src_a,
+ nir_inot(b, dst_a)),
+ nir_imm_int(b, ~0),
+ a_chan);
+ case PIPE_BLENDFACTOR_CONST_COLOR:
+ return vc4_nir_get_state_uniform(b, QUNIFORM_BLEND_CONST_COLOR_RGBA);
+ case PIPE_BLENDFACTOR_CONST_ALPHA:
+ return vc4_nir_get_state_uniform(b, QUNIFORM_BLEND_CONST_COLOR_AAAA);
+ case PIPE_BLENDFACTOR_ZERO:
+ return nir_imm_int(b, 0);
+ case PIPE_BLENDFACTOR_INV_SRC_COLOR:
+ return nir_inot(b, src);
+ case PIPE_BLENDFACTOR_INV_SRC_ALPHA:
+ return nir_inot(b, src_a);
+ case PIPE_BLENDFACTOR_INV_DST_ALPHA:
+ return nir_inot(b, dst_a);
+ case PIPE_BLENDFACTOR_INV_DST_COLOR:
+ return nir_inot(b, dst);
+ case PIPE_BLENDFACTOR_INV_CONST_COLOR:
+ return nir_inot(b, vc4_nir_get_state_uniform(b, QUNIFORM_BLEND_CONST_COLOR_RGBA));
+ case PIPE_BLENDFACTOR_INV_CONST_ALPHA:
+ return nir_inot(b, vc4_nir_get_state_uniform(b, QUNIFORM_BLEND_CONST_COLOR_AAAA));
+
+ default:
+ case PIPE_BLENDFACTOR_SRC1_COLOR:
+ case PIPE_BLENDFACTOR_SRC1_ALPHA:
+ case PIPE_BLENDFACTOR_INV_SRC1_COLOR:
+ case PIPE_BLENDFACTOR_INV_SRC1_ALPHA:
+ /* Unsupported. */
+ fprintf(stderr, "Unknown blend factor %d\n", factor);
+ return nir_imm_int(b, ~0);
+ }
+}
+
+static nir_ssa_def *
+vc4_blend_func_f(nir_builder *b, nir_ssa_def *src, nir_ssa_def *dst,
+ unsigned func)
{
switch (func) {
case PIPE_BLEND_ADD:
}
}
+static nir_ssa_def *
+vc4_blend_func_i(nir_builder *b, nir_ssa_def *src, nir_ssa_def *dst,
+ unsigned func)
+{
+ switch (func) {
+ case PIPE_BLEND_ADD:
+ return nir_usadd_4x8(b, src, dst);
+ case PIPE_BLEND_SUBTRACT:
+ return nir_ussub_4x8(b, src, dst);
+ case PIPE_BLEND_REVERSE_SUBTRACT:
+ return nir_ussub_4x8(b, dst, src);
+ case PIPE_BLEND_MIN:
+ return nir_umin_4x8(b, src, dst);
+ case PIPE_BLEND_MAX:
+ return nir_umax_4x8(b, src, dst);
+
+ default:
+ /* Unsupported. */
+ fprintf(stderr, "Unknown blend func %d\n", func);
+ return src;
+
+ }
+}
+
static void
-vc4_do_blending(struct vc4_compile *c, nir_builder *b, nir_ssa_def **result,
- nir_ssa_def **src_color, nir_ssa_def **dst_color)
+vc4_do_blending_f(struct vc4_compile *c, nir_builder *b, nir_ssa_def **result,
+ nir_ssa_def **src_color, nir_ssa_def **dst_color)
{
struct pipe_rt_blend_state *blend = &c->fs_key->blend;
int dst_factor = ((i != 3) ? blend->rgb_dst_factor :
blend->alpha_dst_factor);
src_blend[i] = nir_fmul(b, src_color[i],
- vc4_blend_channel(b,
- src_color, dst_color,
- src_factor, i));
+ vc4_blend_channel_f(b,
+ src_color, dst_color,
+ src_factor, i));
dst_blend[i] = nir_fmul(b, dst_color[i],
- vc4_blend_channel(b,
- src_color, dst_color,
- dst_factor, i));
+ vc4_blend_channel_f(b,
+ src_color, dst_color,
+ dst_factor, i));
}
for (int i = 0; i < 4; i++) {
- result[i] = vc4_blend_func(b, src_blend[i], dst_blend[i],
- ((i != 3) ? blend->rgb_func :
- blend->alpha_func));
+ result[i] = vc4_blend_func_f(b, src_blend[i], dst_blend[i],
+ ((i != 3) ? blend->rgb_func :
+ blend->alpha_func));
+ }
+}
+
+static nir_ssa_def *
+vc4_nir_splat(nir_builder *b, nir_ssa_def *src)
+{
+ nir_ssa_def *or1 = nir_ior(b, src, nir_ishl(b, src, nir_imm_int(b, 8)));
+ return nir_ior(b, or1, nir_ishl(b, or1, nir_imm_int(b, 16)));
+}
+
+static nir_ssa_def *
+vc4_do_blending_i(struct vc4_compile *c, nir_builder *b,
+ nir_ssa_def *src_color, nir_ssa_def *dst_color,
+ nir_ssa_def *src_float_a)
+{
+ struct pipe_rt_blend_state *blend = &c->fs_key->blend;
+
+ if (!blend->blend_enable)
+ return src_color;
+
+ enum pipe_format color_format = c->fs_key->color_format;
+ const uint8_t *format_swiz = vc4_get_format_swizzle(color_format);
+ nir_ssa_def *imm_0xff = nir_imm_int(b, 0xff);
+ nir_ssa_def *src_a = nir_pack_unorm_4x8(b, src_float_a);
+ nir_ssa_def *dst_a;
+ int alpha_chan;
+ for (alpha_chan = 0; alpha_chan < 4; alpha_chan++) {
+ if (format_swiz[alpha_chan] == 3)
+ break;
+ }
+ if (alpha_chan != 4) {
+ nir_ssa_def *shift = nir_imm_int(b, alpha_chan * 8);
+ dst_a = vc4_nir_splat(b, nir_iand(b, nir_ushr(b, dst_color,
+ shift), imm_0xff));
+ } else {
+ dst_a = nir_imm_int(b, ~0);
+ }
+
+ nir_ssa_def *src_factor = vc4_blend_channel_i(b,
+ src_color, dst_color,
+ src_a, dst_a,
+ blend->rgb_src_factor,
+ alpha_chan);
+ nir_ssa_def *dst_factor = vc4_blend_channel_i(b,
+ src_color, dst_color,
+ src_a, dst_a,
+ blend->rgb_dst_factor,
+ alpha_chan);
+
+ if (alpha_chan != 4 &&
+ blend->alpha_src_factor != blend->rgb_src_factor) {
+ nir_ssa_def *src_alpha_factor =
+ vc4_blend_channel_i(b,
+ src_color, dst_color,
+ src_a, dst_a,
+ blend->alpha_src_factor,
+ alpha_chan);
+ src_factor = vc4_nir_set_packed_chan(b, src_factor,
+ src_alpha_factor,
+ alpha_chan);
+ }
+ if (alpha_chan != 4 &&
+ blend->alpha_dst_factor != blend->rgb_dst_factor) {
+ nir_ssa_def *dst_alpha_factor =
+ vc4_blend_channel_i(b,
+ src_color, dst_color,
+ src_a, dst_a,
+ blend->alpha_dst_factor,
+ alpha_chan);
+ dst_factor = vc4_nir_set_packed_chan(b, dst_factor,
+ dst_alpha_factor,
+ alpha_chan);
+ }
+ nir_ssa_def *src_blend = nir_umul_unorm_4x8(b, src_color, src_factor);
+ nir_ssa_def *dst_blend = nir_umul_unorm_4x8(b, dst_color, dst_factor);
+
+ nir_ssa_def *result =
+ vc4_blend_func_i(b, src_blend, dst_blend, blend->rgb_func);
+ if (alpha_chan != 4 && blend->alpha_func != blend->rgb_func) {
+ nir_ssa_def *result_a = vc4_blend_func_i(b,
+ src_blend,
+ dst_blend,
+ blend->alpha_func);
+ result = vc4_nir_set_packed_chan(b, result, result_a,
+ alpha_chan);
}
+ return result;
}
static nir_ssa_def *
nir_builder_instr_insert(b, &discard->instr);
}
+static nir_ssa_def *
+vc4_nir_swizzle_and_pack(struct vc4_compile *c, nir_builder *b,
+ nir_ssa_def **colors)
+{
+ enum pipe_format color_format = c->fs_key->color_format;
+ const uint8_t *format_swiz = vc4_get_format_swizzle(color_format);
+
+ nir_ssa_def *swizzled[4];
+ for (int i = 0; i < 4; i++) {
+ swizzled[i] = vc4_nir_get_swizzled_channel(b, colors,
+ format_swiz[i]);
+ }
+
+ return nir_pack_unorm_4x8(b,
+ nir_vec4(b,
+ swizzled[0], swizzled[1],
+ swizzled[2], swizzled[3]));
+
+}
+
static void
vc4_nir_lower_blend_instr(struct vc4_compile *c, nir_builder *b,
nir_intrinsic_instr *intr)
{
enum pipe_format color_format = c->fs_key->color_format;
const uint8_t *format_swiz = vc4_get_format_swizzle(color_format);
+ bool srgb = util_format_is_srgb(color_format);
/* Pull out the float src/dst color components. */
nir_ssa_def *packed_dst_color = vc4_nir_get_dst_color(b);
unpacked_dst_color[i] = nir_swizzle(b, dst_vec4, &i, 1, false);
}
- /* Unswizzle the destination color. */
- nir_ssa_def *dst_color[4];
- for (unsigned i = 0; i < 4; i++) {
- dst_color[i] = vc4_nir_get_swizzled_channel(b,
- unpacked_dst_color,
- format_swiz[i]);
- }
-
vc4_nir_emit_alpha_test_discard(c, b, src_color[3]);
- /* Turn dst color to linear. */
- if (util_format_is_srgb(color_format)) {
+ nir_ssa_def *packed_color;
+ if (srgb) {
+ /* Unswizzle the destination color. */
+ nir_ssa_def *dst_color[4];
+ for (unsigned i = 0; i < 4; i++) {
+ dst_color[i] = vc4_nir_get_swizzled_channel(b,
+ unpacked_dst_color,
+ format_swiz[i]);
+ }
+
+ /* Turn dst color to linear. */
for (int i = 0; i < 3; i++)
dst_color[i] = vc4_nir_srgb_decode(b, dst_color[i]);
- }
- nir_ssa_def *blend_color[4];
- vc4_do_blending(c, b, blend_color, src_color, dst_color);
+ nir_ssa_def *blend_color[4];
+ vc4_do_blending_f(c, b, blend_color, src_color, dst_color);
- /* sRGB encode the output color */
- if (util_format_is_srgb(color_format)) {
+ /* sRGB encode the output color */
for (int i = 0; i < 3; i++)
blend_color[i] = vc4_nir_srgb_encode(b, blend_color[i]);
- }
- nir_ssa_def *swizzled_outputs[4];
- for (int i = 0; i < 4; i++) {
- swizzled_outputs[i] =
- vc4_nir_get_swizzled_channel(b, blend_color,
- format_swiz[i]);
- }
+ packed_color = vc4_nir_swizzle_and_pack(c, b, blend_color);
+ } else {
+ nir_ssa_def *packed_src_color =
+ vc4_nir_swizzle_and_pack(c, b, src_color);
- nir_ssa_def *packed_color =
- nir_pack_unorm_4x8(b,
- nir_vec4(b,
- swizzled_outputs[0],
- swizzled_outputs[1],
- swizzled_outputs[2],
- swizzled_outputs[3]));
+ packed_color =
+ vc4_do_blending_i(c, b,
+ packed_src_color, packed_dst_color,
+ src_color[3]);
+ }
packed_color = vc4_logicop(b, c->fs_key->logicop_func,
packed_color, packed_dst_color);
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