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panfrost: Dual source blend support

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Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5620>
This commit is contained in:
Icecream95
2020-06-25 22:56:14 +12:00
committed by Marge Bot
parent 334dab0576
commit 787c1ed209
5 changed files with 37 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
docs/features.txt
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@@ -99,7 +99,7 @@ GL 3.2, GLSL 1.50 --- all DONE: i965, nv50, nvc0, r600, radeonsi, llvmpipe, soft
GL 3.3, GLSL 3.30 --- all DONE: i965, nv50, nvc0, r600, radeonsi, llvmpipe, softpipe, virgl
GL_ARB_blend_func_extended DONE (freedreno/a3xx, swr, zink)
GL_ARB_blend_func_extended DONE (freedreno/a3xx, swr, zink, panfrost)
GL_ARB_explicit_attrib_location DONE (all drivers that support GLSL)
GL_ARB_occlusion_query2 DONE (freedreno, swr, v3d, zink, panfrost)
GL_ARB_sampler_objects DONE (all drivers)

21
src/gallium/drivers/panfrost/nir/nir_lower_blend.c
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@@ -95,7 +95,7 @@ nir_alpha_saturate(
static nir_ssa_def *
nir_blend_factor_value(
nir_builder *b,
nir_ssa_def *src, nir_ssa_def *dst, nir_ssa_def *bconst,
nir_ssa_def *src, nir_ssa_def *src1, nir_ssa_def *dst, nir_ssa_def *bconst,
unsigned chan,
enum blend_factor factor,
bool half)
@@ -105,10 +105,14 @@ nir_blend_factor_value(
return half ? nir_imm_float16(b, 0.0) : nir_imm_float(b, 0.0);
case BLEND_FACTOR_SRC_COLOR:
return nir_channel(b, src, chan);
case BLEND_FACTOR_SRC1_COLOR:
return nir_channel(b, src1, chan);
case BLEND_FACTOR_DST_COLOR:
return nir_channel(b, dst, chan);
case BLEND_FACTOR_SRC_ALPHA:
return nir_channel(b, src, 3);
case BLEND_FACTOR_SRC1_ALPHA:
return nir_channel(b, src1, 3);
case BLEND_FACTOR_DST_ALPHA:
return nir_channel(b, dst, 3);
case BLEND_FACTOR_CONSTANT_COLOR:
@@ -126,14 +130,14 @@ static nir_ssa_def *
nir_blend_factor(
nir_builder *b,
nir_ssa_def *raw_scalar,
nir_ssa_def *src, nir_ssa_def *dst, nir_ssa_def *bconst,
nir_ssa_def *src, nir_ssa_def *src1, nir_ssa_def *dst, nir_ssa_def *bconst,
unsigned chan,
enum blend_factor factor,
bool inverted,
bool half)
{
nir_ssa_def *f =
nir_blend_factor_value(b, src, dst, bconst, chan, factor, half);
nir_blend_factor_value(b, src, src1, dst, bconst, chan, factor, half);
nir_ssa_def *unity = half ? nir_imm_float16(b, 1.0) : nir_imm_float(b, 1.0);
@@ -256,7 +260,7 @@ static nir_ssa_def *
nir_blend(
nir_builder *b,
nir_lower_blend_options options,
nir_ssa_def *src, nir_ssa_def *dst)
nir_ssa_def *src, nir_ssa_def *src1, nir_ssa_def *dst)
{
if (options.logicop_enable)
return nir_blend_logicop(b, options, src, dst);
@@ -281,12 +285,12 @@ nir_blend(
if (nir_blend_factored(chan.func)) {
psrc = nir_blend_factor(
b, psrc,
src, dst, bconst, c,
src, src1, dst, bconst, c,
chan.src_factor, chan.invert_src_factor, options.half);
pdst = nir_blend_factor(
b, pdst,
src, dst, bconst, c,
src, src1, dst, bconst, c,
chan.dst_factor, chan.invert_dst_factor, options.half);
}
@@ -349,11 +353,14 @@ nir_lower_blend(nir_shader *shader, nir_lower_blend_options options)
/* Grab the input color */
nir_ssa_def *src = nir_ssa_for_src(&b, intr->src[1], 4);
/* Grab the dual-source input color */
nir_ssa_def *src1 = options.src1;
/* Grab the tilebuffer color - io lowered to load_output */
nir_ssa_def *dst = nir_load_var(&b, var);
/* Blend the two colors per the passed options */
nir_ssa_def *blended = nir_blend(&b, options, src, dst);
nir_ssa_def *blended = nir_blend(&b, options, src, src1, dst);
/* Write out the final color instead of the input */
nir_instr_rewrite_src(instr, &intr->src[1],

2
src/gallium/drivers/panfrost/nir/nir_lower_blend.h
View File

@@ -55,6 +55,8 @@ typedef struct {
/* Use fp16 instead of fp32 */
bool half;
nir_ssa_def *src1;
} nir_lower_blend_options;
void nir_lower_blend(nir_shader *shader, nir_lower_blend_options options);

21
src/gallium/drivers/panfrost/pan_blend_shaders.c
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@@ -165,11 +165,15 @@ panfrost_compile_blend_shader(
/* Create the blend variables */
nir_variable *c_src = nir_variable_create(shader, nir_var_shader_in, glsl_vector_type(GLSL_TYPE_FLOAT, 4), "gl_Color");
nir_variable *c_src1 = nir_variable_create(shader, nir_var_shader_in, glsl_vector_type(GLSL_TYPE_FLOAT, 4), "gl_Color1");
nir_variable *c_out = nir_variable_create(shader, nir_var_shader_out, glsl_vector_type(g, 4), "gl_FragColor");
c_src->data.location = VARYING_SLOT_COL0;
c_src1->data.location = VARYING_SLOT_VAR0;
c_out->data.location = FRAG_RESULT_COLOR;
c_src1->data.driver_location = 1;
/* Setup nir_builder */
nir_builder _b;
@@ -179,25 +183,28 @@ panfrost_compile_blend_shader(
/* Setup inputs */
nir_ssa_def *s_src = nir_load_var(b, c_src);
nir_ssa_def *s_src[] = {nir_load_var(b, c_src), nir_load_var(b, c_src1)};
for (int i = 0; i < ARRAY_SIZE(s_src); ++i) {
if (T == nir_type_float16)
s_src = nir_f2f16(b, s_src);
s_src[i] = nir_f2f16(b, s_src[i]);
else if (T == nir_type_int16)
s_src = nir_i2i16(b, nir_iclamp(b, s_src, -32768, 32767));
s_src[i] = nir_i2i16(b, nir_iclamp(b, s_src[i], -32768, 32767));
else if (T == nir_type_uint16)
s_src = nir_u2u16(b, nir_umin(b, s_src, nir_imm_int(b, 65535)));
s_src[i] = nir_u2u16(b, nir_umin(b, s_src[i], nir_imm_int(b, 65535)));
else if (T == nir_type_int8)
s_src = nir_i2i8(b, nir_iclamp(b, s_src, -128, 127));
s_src[i] = nir_i2i8(b, nir_iclamp(b, s_src[i], -128, 127));
else if (T == nir_type_uint8)
s_src = nir_u2u8(b, nir_umin(b, s_src, nir_imm_int(b, 255)));
s_src[i] = nir_u2u8(b, nir_umin(b, s_src[i], nir_imm_int(b, 255)));
}
/* Build a trivial blend shader */
nir_store_var(b, c_out, s_src, 0xFF);
nir_store_var(b, c_out, s_src[0], 0xFF);
nir_lower_blend_options options =
nir_make_options(cso, rt);
options.format = format;
options.src1 = s_src[1];
if (T == nir_type_float16)
options.half = true;

2
src/gallium/drivers/panfrost/pan_screen.c
View File

@@ -120,7 +120,7 @@ panfrost_get_param(struct pipe_screen *screen, enum pipe_cap param)
return is_gles3 ? 4 : 1;
case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
return is_gl3 ? 1 : 0;
return 1;
/* Throttling frames breaks pipelining */
case PIPE_CAP_THROTTLE: