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-rw-r--r--src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c155
1 files changed, 83 insertions, 72 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c b/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c
index 29845c65d03..9741dbb389c 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c
@@ -843,87 +843,98 @@ lp_build_lod_selector(struct lp_build_sample_context *bld,
LLVMValueRef depth)
{
- const int dims = texture_dims(bld->static_state->target);
- struct lp_build_context *float_bld = &bld->float_bld;
- LLVMValueRef lod_bias = LLVMConstReal(LLVMFloatType(), bld->static_state->lod_bias);
- LLVMValueRef min_lod = LLVMConstReal(LLVMFloatType(), bld->static_state->min_lod);
- LLVMValueRef max_lod = LLVMConstReal(LLVMFloatType(), bld->static_state->max_lod);
-
- LLVMValueRef index0 = LLVMConstInt(LLVMInt32Type(), 0, 0);
- LLVMValueRef index1 = LLVMConstInt(LLVMInt32Type(), 1, 0);
- LLVMValueRef index2 = LLVMConstInt(LLVMInt32Type(), 2, 0);
-
- LLVMValueRef s0, s1, s2;
- LLVMValueRef t0, t1, t2;
- LLVMValueRef r0, r1, r2;
- LLVMValueRef dsdx, dsdy, dtdx, dtdy, drdx, drdy;
- LLVMValueRef rho, lod;
-
- /*
- * dsdx = abs(s[1] - s[0]);
- * dsdy = abs(s[2] - s[0]);
- * dtdx = abs(t[1] - t[0]);
- * dtdy = abs(t[2] - t[0]);
- * drdx = abs(r[1] - r[0]);
- * drdy = abs(r[2] - r[0]);
- * XXX we're assuming a four-element quad in 2x2 layout here.
- */
- s0 = LLVMBuildExtractElement(bld->builder, s, index0, "s0");
- s1 = LLVMBuildExtractElement(bld->builder, s, index1, "s1");
- s2 = LLVMBuildExtractElement(bld->builder, s, index2, "s2");
- dsdx = LLVMBuildSub(bld->builder, s1, s0, "");
- dsdx = lp_build_abs(float_bld, dsdx);
- dsdy = LLVMBuildSub(bld->builder, s2, s0, "");
- dsdy = lp_build_abs(float_bld, dsdy);
- if (dims > 1) {
- t0 = LLVMBuildExtractElement(bld->builder, t, index0, "t0");
- t1 = LLVMBuildExtractElement(bld->builder, t, index1, "t1");
- t2 = LLVMBuildExtractElement(bld->builder, t, index2, "t2");
- dtdx = LLVMBuildSub(bld->builder, t1, t0, "");
- dtdx = lp_build_abs(float_bld, dtdx);
- dtdy = LLVMBuildSub(bld->builder, t2, t0, "");
- dtdy = lp_build_abs(float_bld, dtdy);
- if (dims > 2) {
- r0 = LLVMBuildExtractElement(bld->builder, r, index0, "r0");
- r1 = LLVMBuildExtractElement(bld->builder, r, index1, "r1");
- r2 = LLVMBuildExtractElement(bld->builder, r, index2, "r2");
- drdx = LLVMBuildSub(bld->builder, r1, r0, "");
- drdx = lp_build_abs(float_bld, drdx);
- drdy = LLVMBuildSub(bld->builder, r2, r0, "");
- drdy = lp_build_abs(float_bld, drdy);
- }
+ if (bld->static_state->min_lod == bld->static_state->max_lod) {
+ /* User is forcing sampling from a particular mipmap level.
+ * This is hit during mipmap generation.
+ */
+ return LLVMConstReal(LLVMFloatType(), bld->static_state->min_lod);
}
+ else {
+ const int dims = texture_dims(bld->static_state->target);
+ struct lp_build_context *float_bld = &bld->float_bld;
+ LLVMValueRef lod_bias = LLVMConstReal(LLVMFloatType(),
+ bld->static_state->lod_bias);
+ LLVMValueRef min_lod = LLVMConstReal(LLVMFloatType(),
+ bld->static_state->min_lod);
+ LLVMValueRef max_lod = LLVMConstReal(LLVMFloatType(),
+ bld->static_state->max_lod);
+
+ LLVMValueRef index0 = LLVMConstInt(LLVMInt32Type(), 0, 0);
+ LLVMValueRef index1 = LLVMConstInt(LLVMInt32Type(), 1, 0);
+ LLVMValueRef index2 = LLVMConstInt(LLVMInt32Type(), 2, 0);
+
+ LLVMValueRef s0, s1, s2;
+ LLVMValueRef t0, t1, t2;
+ LLVMValueRef r0, r1, r2;
+ LLVMValueRef dsdx, dsdy, dtdx, dtdy, drdx, drdy;
+ LLVMValueRef rho, lod;
+
+ /*
+ * dsdx = abs(s[1] - s[0]);
+ * dsdy = abs(s[2] - s[0]);
+ * dtdx = abs(t[1] - t[0]);
+ * dtdy = abs(t[2] - t[0]);
+ * drdx = abs(r[1] - r[0]);
+ * drdy = abs(r[2] - r[0]);
+ * XXX we're assuming a four-element quad in 2x2 layout here.
+ */
+ s0 = LLVMBuildExtractElement(bld->builder, s, index0, "s0");
+ s1 = LLVMBuildExtractElement(bld->builder, s, index1, "s1");
+ s2 = LLVMBuildExtractElement(bld->builder, s, index2, "s2");
+ dsdx = LLVMBuildSub(bld->builder, s1, s0, "");
+ dsdx = lp_build_abs(float_bld, dsdx);
+ dsdy = LLVMBuildSub(bld->builder, s2, s0, "");
+ dsdy = lp_build_abs(float_bld, dsdy);
+ if (dims > 1) {
+ t0 = LLVMBuildExtractElement(bld->builder, t, index0, "t0");
+ t1 = LLVMBuildExtractElement(bld->builder, t, index1, "t1");
+ t2 = LLVMBuildExtractElement(bld->builder, t, index2, "t2");
+ dtdx = LLVMBuildSub(bld->builder, t1, t0, "");
+ dtdx = lp_build_abs(float_bld, dtdx);
+ dtdy = LLVMBuildSub(bld->builder, t2, t0, "");
+ dtdy = lp_build_abs(float_bld, dtdy);
+ if (dims > 2) {
+ r0 = LLVMBuildExtractElement(bld->builder, r, index0, "r0");
+ r1 = LLVMBuildExtractElement(bld->builder, r, index1, "r1");
+ r2 = LLVMBuildExtractElement(bld->builder, r, index2, "r2");
+ drdx = LLVMBuildSub(bld->builder, r1, r0, "");
+ drdx = lp_build_abs(float_bld, drdx);
+ drdy = LLVMBuildSub(bld->builder, r2, r0, "");
+ drdy = lp_build_abs(float_bld, drdy);
+ }
+ }
- /* Compute rho = max of all partial derivatives scaled by texture size.
- * XXX this could be vectorized somewhat
- */
- rho = LLVMBuildMul(bld->builder,
- lp_build_max(float_bld, dsdx, dsdy),
- lp_build_int_to_float(float_bld, width), "");
- if (dims > 1) {
- LLVMValueRef max;
- max = LLVMBuildMul(bld->builder,
- lp_build_max(float_bld, dtdx, dtdy),
- lp_build_int_to_float(float_bld, height), "");
- rho = lp_build_max(float_bld, rho, max);
- if (dims > 2) {
+ /* Compute rho = max of all partial derivatives scaled by texture size.
+ * XXX this could be vectorized somewhat
+ */
+ rho = LLVMBuildMul(bld->builder,
+ lp_build_max(float_bld, dsdx, dsdy),
+ lp_build_int_to_float(float_bld, width), "");
+ if (dims > 1) {
+ LLVMValueRef max;
max = LLVMBuildMul(bld->builder,
- lp_build_max(float_bld, drdx, drdy),
- lp_build_int_to_float(float_bld, depth), "");
+ lp_build_max(float_bld, dtdx, dtdy),
+ lp_build_int_to_float(float_bld, height), "");
rho = lp_build_max(float_bld, rho, max);
+ if (dims > 2) {
+ max = LLVMBuildMul(bld->builder,
+ lp_build_max(float_bld, drdx, drdy),
+ lp_build_int_to_float(float_bld, depth), "");
+ rho = lp_build_max(float_bld, rho, max);
+ }
}
- }
- /* compute lod = log2(rho) */
- lod = lp_build_log2(float_bld, rho);
+ /* compute lod = log2(rho) */
+ lod = lp_build_log2(float_bld, rho);
- /* add lod bias */
- lod = LLVMBuildAdd(bld->builder, lod, lod_bias, "LOD bias");
+ /* add lod bias */
+ lod = LLVMBuildAdd(bld->builder, lod, lod_bias, "LOD bias");
- /* clamp lod */
- lod = lp_build_clamp(float_bld, lod, min_lod, max_lod);
+ /* clamp lod */
+ lod = lp_build_clamp(float_bld, lod, min_lod, max_lod);
- return lod;
+ return lod;
+ }
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-16 22:03:24 +0000