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-rw-r--r--src/mesa/main/ffvertex_prog.c2
-rw-r--r--src/mesa/shader/prog_statevars.c64
-rw-r--r--src/mesa/shader/prog_statevars.h2
-rw-r--r--src/mesa/state_tracker/st_extensions.c5
-rw-r--r--src/mesa/state_tracker/st_mesa_to_tgsi.c36
5 files changed, 108 insertions, 1 deletions
diff --git a/src/mesa/main/ffvertex_prog.c b/src/mesa/main/ffvertex_prog.c
index 2d1db29cbfe..867a55242c0 100644
--- a/src/mesa/main/ffvertex_prog.c
+++ b/src/mesa/main/ffvertex_prog.c
@@ -1496,7 +1496,7 @@ static void build_texture_transform( struct tnl_program *p )
static void build_atten_pointsize( struct tnl_program *p )
{
struct ureg eye = get_eye_position_z(p);
- struct ureg state_size = register_param1(p, STATE_POINT_SIZE);
+ struct ureg state_size = register_param2(p, STATE_INTERNAL, STATE_POINT_SIZE_CLAMPED);
struct ureg state_attenuation = register_param1(p, STATE_POINT_ATTENUATION);
struct ureg out = register_output(p, VERT_RESULT_PSIZ);
struct ureg ut = get_temp(p);
diff --git a/src/mesa/shader/prog_statevars.c b/src/mesa/shader/prog_statevars.c
index 058d4bbafb7..460ecd44a84 100644
--- a/src/mesa/shader/prog_statevars.c
+++ b/src/mesa/shader/prog_statevars.c
@@ -444,6 +444,61 @@ _mesa_fetch_state(GLcontext *ctx, const gl_state_index state[],
value[3] = (GLfloat)(ctx->Fog.Density * ONE_DIV_SQRT_LN2);
return;
+ case STATE_POINT_SIZE_CLAMPED:
+ {
+ /* this includes implementation dependent limits, to avoid
+ * another potentially necessary clamp.
+ * Note: for sprites, point smooth (point AA) is ignored
+ * and we'll clamp to MinPointSizeAA and MaxPointSize, because we
+ * expect drivers will want to say their minimum for AA size is 0.0
+ * but for non-AA it's 1.0 (because normal points with size below 1.0
+ * need to get rounded up to 1.0, hence never disappear). GL does
+ * not specify max clamp size for sprites, other than it needs to be
+ * at least as large as max AA size, hence use non-AA size there.
+ */
+ GLfloat minImplSize;
+ GLfloat maxImplSize;
+ if (ctx->Point.PointSprite) {
+ minImplSize = ctx->Const.MinPointSizeAA;
+ maxImplSize = ctx->Const.MaxPointSize;
+ }
+ else if (ctx->Point.SmoothFlag || ctx->Multisample._Enabled) {
+ minImplSize = ctx->Const.MinPointSizeAA;
+ maxImplSize = ctx->Const.MaxPointSizeAA;
+ }
+ else {
+ minImplSize = ctx->Const.MinPointSize;
+ maxImplSize = ctx->Const.MaxPointSize;
+ }
+ value[0] = ctx->Point.Size;
+ value[1] = ctx->Point.MinSize >= minImplSize ? ctx->Point.MinSize : minImplSize;
+ value[2] = ctx->Point.MaxSize <= maxImplSize ? ctx->Point.MaxSize : maxImplSize;
+ value[3] = ctx->Point.Threshold;
+ }
+ return;
+ case STATE_POINT_SIZE_IMPL_CLAMP:
+ {
+ /* for implementation clamp only in vs */
+ GLfloat minImplSize;
+ GLfloat maxImplSize;
+ if (ctx->Point.PointSprite) {
+ minImplSize = ctx->Const.MinPointSizeAA;
+ maxImplSize = ctx->Const.MaxPointSize;
+ }
+ else if (ctx->Point.SmoothFlag || ctx->Multisample._Enabled) {
+ minImplSize = ctx->Const.MinPointSizeAA;
+ maxImplSize = ctx->Const.MaxPointSizeAA;
+ }
+ else {
+ minImplSize = ctx->Const.MinPointSize;
+ maxImplSize = ctx->Const.MaxPointSize;
+ }
+ value[0] = ctx->Point.Size;
+ value[1] = minImplSize;
+ value[2] = maxImplSize;
+ value[3] = ctx->Point.Threshold;
+ }
+ return;
case STATE_LIGHT_SPOT_DIR_NORMALIZED:
{
/* here, state[2] is the light number */
@@ -639,6 +694,9 @@ _mesa_program_state_flags(const gl_state_index state[STATE_LENGTH])
return _NEW_TEXTURE;
case STATE_FOG_PARAMS_OPTIMIZED:
return _NEW_FOG;
+ case STATE_POINT_SIZE_CLAMPED:
+ case STATE_POINT_SIZE_IMPL_CLAMP:
+ return _NEW_POINT | _NEW_MULTISAMPLE;
case STATE_LIGHT_SPOT_DIR_NORMALIZED:
case STATE_LIGHT_POSITION:
case STATE_LIGHT_POSITION_NORMALIZED:
@@ -830,6 +888,12 @@ append_token(char *dst, gl_state_index k)
case STATE_FOG_PARAMS_OPTIMIZED:
append(dst, "fogParamsOptimized");
break;
+ case STATE_POINT_SIZE_CLAMPED:
+ append(dst, "pointSizeClamped");
+ break;
+ case STATE_POINT_SIZE_IMPL_CLAMP:
+ append(dst, "pointSizeImplClamp");
+ break;
case STATE_LIGHT_SPOT_DIR_NORMALIZED:
append(dst, "lightSpotDirNormalized");
break;
diff --git a/src/mesa/shader/prog_statevars.h b/src/mesa/shader/prog_statevars.h
index 1180d9eaa4a..1753471ffb6 100644
--- a/src/mesa/shader/prog_statevars.h
+++ b/src/mesa/shader/prog_statevars.h
@@ -108,6 +108,8 @@ typedef enum gl_state_index_ {
STATE_NORMAL_SCALE,
STATE_TEXRECT_SCALE,
STATE_FOG_PARAMS_OPTIMIZED, /* for faster fog calc */
+ STATE_POINT_SIZE_CLAMPED, /* includes implementation dependent size clamp */
+ STATE_POINT_SIZE_IMPL_CLAMP, /* for implementation clamp only in vs */
STATE_LIGHT_SPOT_DIR_NORMALIZED, /* pre-normalized spot dir */
STATE_LIGHT_POSITION, /* object vs eye space */
STATE_LIGHT_POSITION_NORMALIZED, /* object vs eye space */
diff --git a/src/mesa/state_tracker/st_extensions.c b/src/mesa/state_tracker/st_extensions.c
index 35e08749df7..7684ccd702b 100644
--- a/src/mesa/state_tracker/st_extensions.c
+++ b/src/mesa/state_tracker/st_extensions.c
@@ -114,6 +114,11 @@ void st_init_limits(struct st_context *st)
= _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_POINT_WIDTH));
c->MaxPointSizeAA
= _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_POINT_WIDTH_AA));
+ /* these are not queryable. Note that GL basically mandates a 1.0 minimum
+ * for non-aa sizes, but we can go down to 0.0 for aa points.
+ */
+ c->MinPointSize = 1.0f;
+ c->MinPointSizeAA = 0.0f;
c->MaxTextureMaxAnisotropy
= _maxf(2.0f, screen->get_paramf(screen, PIPE_CAP_MAX_TEXTURE_ANISOTROPY));
diff --git a/src/mesa/state_tracker/st_mesa_to_tgsi.c b/src/mesa/state_tracker/st_mesa_to_tgsi.c
index e788008dfe1..4830a8f383a 100644
--- a/src/mesa/state_tracker/st_mesa_to_tgsi.c
+++ b/src/mesa/state_tracker/st_mesa_to_tgsi.c
@@ -57,6 +57,10 @@ struct st_translate {
struct ureg_src inputs[PIPE_MAX_SHADER_INPUTS];
struct ureg_dst address[1];
struct ureg_src samplers[PIPE_MAX_SAMPLERS];
+ struct ureg_dst psizregreal;
+ struct ureg_src pointSizeConst;
+ GLint psizoutindex;
+ GLboolean prevInstWrotePsiz;
const GLuint *inputMapping;
const GLuint *outputMapping;
@@ -145,6 +149,8 @@ dst_register( struct st_translate *t,
return t->temps[index];
case PROGRAM_OUTPUT:
+ if (index == t->psizoutindex)
+ t->prevInstWrotePsiz = GL_TRUE;
return t->outputs[t->outputMapping[index]];
case PROGRAM_ADDRESS:
@@ -787,6 +793,8 @@ st_translate_mesa_program(
t->inputMapping = inputMapping;
t->outputMapping = outputMapping;
t->ureg = ureg;
+ t->psizoutindex = -1;
+ t->prevInstWrotePsiz = GL_FALSE;
/*_mesa_print_program(program);*/
@@ -845,6 +853,21 @@ st_translate_mesa_program(
t->outputs[i] = ureg_DECL_output( ureg,
outputSemanticName[i],
outputSemanticIndex[i] );
+ if ((outputSemanticName[i] == TGSI_SEMANTIC_PSIZE) && program->Id) {
+ static const gl_state_index pointSizeClampState[STATE_LENGTH]
+ = { STATE_INTERNAL, STATE_POINT_SIZE_IMPL_CLAMP, 0, 0, 0 };
+ /* XXX: note we are modifying the incoming shader here! Need to
+ * do this before emitting the constant decls below, or this
+ * will be missed:
+ */
+ unsigned pointSizeClampConst = _mesa_add_state_reference(program->Parameters,
+ pointSizeClampState);
+ struct ureg_dst psizregtemp = ureg_DECL_temporary( ureg );
+ t->pointSizeConst = ureg_DECL_constant( ureg, pointSizeClampConst );
+ t->psizregreal = t->outputs[i];
+ t->psizoutindex = i;
+ t->outputs[i] = psizregtemp;
+ }
}
if (passthrough_edgeflags)
emit_edgeflags( t, program );
@@ -910,6 +933,19 @@ st_translate_mesa_program(
for (i = 0; i < program->NumInstructions; i++) {
set_insn_start( t, ureg_get_instruction_number( ureg ));
compile_instruction( t, &program->Instructions[i] );
+
+ /* note can't do that easily at the end of prog due to
+ possible early return */
+ if (t->prevInstWrotePsiz && program->Id) {
+ set_insn_start( t, ureg_get_instruction_number( ureg ));
+ ureg_MAX( t->ureg, ureg_writemask(t->outputs[t->psizoutindex], WRITEMASK_X),
+ ureg_src(t->outputs[t->psizoutindex]),
+ ureg_swizzle(t->pointSizeConst, 1,1,1,1));
+ ureg_MIN( t->ureg, ureg_writemask(t->psizregreal, WRITEMASK_X),
+ ureg_src(t->outputs[t->psizoutindex]),
+ ureg_swizzle(t->pointSizeConst, 2,2,2,2));
+ }
+ t->prevInstWrotePsiz = GL_FALSE;
}
/* Fix up all emitted labels:
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-03 20:50:48 +0000