CC=gcc
CXX=g++
-CXXFLAGS=-Wall -g -I$(GTEST_DIR)/include $(shell pkg-config --cflags eigen3 )
-LDFLAGS=-lSDL -lSDL_image -lGL -lrt -lpthread
+CXXFLAGS=-Wall -g -I$(GTEST_DIR)/include $(shell pkg-config --cflags eigen3 ) -fprofile-arcs -ftest-coverage
+LDFLAGS=-lSDL -lSDL_image -lGL -lrt -lpthread -fprofile-arcs -ftest-coverage
RANLIB=ranlib
DEMO_OBJS=demo.o
-TESTS=effect_chain_test mix_effect_test
+TESTS=effect_chain_test mix_effect_test gamma_expansion_effect_test
# Core.
LIB_OBJS=util.o widgets.o effect.o effect_chain.o
$(CXX) -o $@ $^ $(LDFLAGS)
mix_effect_test: mix_effect_test.o $(TEST_OBJS) libmovit.a
$(CXX) -o $@ $^ $(LDFLAGS)
+gamma_expansion_effect_test: gamma_expansion_effect_test.o $(TEST_OBJS) libmovit.a
+ $(CXX) -o $@ $^ $(LDFLAGS)
OBJS=$(DEMO_OBJS) $(LIB_OBJS) $(TEST_OBJS) $(TESTS:=.o)
--- /dev/null
+// Unit tests for GammaExpansionEffect.
+
+#include "test_util.h"
+#include "gtest/gtest.h"
+#include "gamma_expansion_effect.h"
+
+TEST(GammaExpansionEffectTest, sRGB_KeyValues) {
+ float data[] = {
+ 0.0f, 1.0f,
+ 0.040f, 0.041f, // On either side of the discontinuity.
+ };
+ float expected_data[] = {
+ 0.0f, 1.0f,
+ 0.00309f, 0.00317f,
+ };
+ float out_data[4];
+ EffectChainTester tester(data, 2, 2, COLORSPACE_sRGB, GAMMA_sRGB);
+ tester.run(out_data, COLORSPACE_sRGB, GAMMA_LINEAR);
+
+ expect_equal(expected_data, out_data, 2, 2);
+}
+
+TEST(GammaExpansionEffectTest, sRGB_RampAlwaysIncreases) {
+ float data[256], out_data[256];
+ for (unsigned i = 0; i < 256; ++i) {
+ data[i] = i / 255.0f;
+ }
+ EffectChainTester tester(data, 256, 1, COLORSPACE_sRGB, GAMMA_sRGB);
+ tester.run(out_data, COLORSPACE_sRGB, GAMMA_LINEAR);
+
+ for (unsigned i = 1; i < 256; ++i) {
+ EXPECT_GT(out_data[i], out_data[i - 1])
+ << "No increase between " << i-1 << " and " << i;
+ }
+}