X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=resample_effect_test.cpp;h=b47bd577d3740452a28715131834d26570b052de;hb=30df048c8f318c6f31dcb122b4983d65b4e6db24;hp=7955c5ba99f480a94f048385f1697ffa0fb09091;hpb=e09662ec1b11f72746c7691fef56e14241d32d1c;p=movit

diff --git a/resample_effect_test.cpp b/resample_effect_test.cpp
index 7955c5b..b47bd57 100644
--- a/resample_effect_test.cpp
+++ b/resample_effect_test.cpp
@@ -9,6 +9,7 @@
 #include "effect_chain.h"
 #include "flat_input.h"
 #include "image_format.h"
+#include "init.h"
 #include "resample_effect.h"
 #include "test_util.h"
 
@@ -471,6 +472,24 @@ BENCHMARK_CAPTURE(BM_ResampleEffectFloat, Float32Upscale, GAMMA_LINEAR, "fragmen
 BENCHMARK_CAPTURE(BM_ResampleEffectInt8, Int8Downscale, GAMMA_REC_709, "fragment")->Args({1280, 720, 640, 360})->Args({1280, 720, 320, 180})->Args({1280, 720, 321, 181})->UseRealTime()->Unit(benchmark::kMicrosecond);
 BENCHMARK_CAPTURE(BM_ResampleEffectFloat, Float32Downscale, GAMMA_LINEAR, "fragment")->Args({1280, 720, 640, 360})->Args({1280, 720, 320, 180})->Args({1280, 720, 321, 181})->UseRealTime()->Unit(benchmark::kMicrosecond);
 
+void BM_ComputeScalingWeights(benchmark::State &state)
+{
+	constexpr unsigned src_size = 1280;
+	constexpr unsigned dst_size = 35;
+	int old_precision = movit_texel_subpixel_precision;
+	movit_texel_subpixel_precision = 64;  // To get consistent results across GPUs; this is a CPU test.
+
+	// One iteration warmup to make sure the Lanczos table is computed.
+	calculate_scaling_weights(src_size, dst_size, 0.999f, 0.0f);
+
+	for (auto _ : state) {
+		ScalingWeights weights = calculate_scaling_weights(src_size, dst_size, 0.999f, 0.0f);
+	}
+
+	movit_texel_subpixel_precision = old_precision;
+}
+BENCHMARK(BM_ComputeScalingWeights)->Unit(benchmark::kMicrosecond);
+
 #endif
 
 }  // namespace movit