+TEST(EffectChainTest, RewritingWorksAndTexturesAreAskedForsRGB) {
+ unsigned char data[] = {
+ 0, 64,
+ 128, 255,
+ };
+ float expected_data[4] = {
+ 1.0f, 0.9771f,
+ 0.8983f, 0.0f,
+ };
+ float out_data[2];
+ EffectChainTester tester(NULL, 2, 2);
+ tester.add_input(data, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_sRGB);
+ RewritingToInvertEffect *effect = new RewritingToInvertEffect();
+ tester.get_chain()->add_effect(effect);
+ tester.run(out_data, GL_RED, COLORSPACE_sRGB, GAMMA_sRGB);
+
+ Node *node = effect->invert_node;
+ ASSERT_EQ(1, node->incoming_links.size());
+ ASSERT_EQ(1, node->outgoing_links.size());
+ EXPECT_EQ("FlatInput", node->incoming_links[0]->effect->effect_type_id());
+ EXPECT_EQ("GammaCompressionEffect", node->outgoing_links[0]->effect->effect_type_id());
+
+ expect_equal(expected_data, out_data, 2, 2);
+}
+
+TEST(EffectChainTest, RewritingWorksAndColorspaceConversionsAreInserted) {
+ float data[] = {
+ 0.0f, 0.25f, 0.3f,
+ 0.75f, 1.0f, 1.0f,
+ };
+ float expected_data[6] = {
+ 1.0f, 0.75f, 0.7f,
+ 0.25f, 0.0f, 0.0f,
+ };
+ float out_data[6];
+ EffectChainTester tester(data, 3, 2, FORMAT_GRAYSCALE, COLORSPACE_REC_601_525, GAMMA_LINEAR);
+ RewritingToInvertEffect *effect = new RewritingToInvertEffect();
+ tester.get_chain()->add_effect(effect);
+ tester.run(out_data, GL_RED, COLORSPACE_REC_601_525, GAMMA_LINEAR);
+
+ Node *node = effect->invert_node;
+ ASSERT_EQ(1, node->incoming_links.size());
+ ASSERT_EQ(1, node->outgoing_links.size());
+ EXPECT_EQ("ColorspaceConversionEffect", node->incoming_links[0]->effect->effect_type_id());
+ EXPECT_EQ("ColorspaceConversionEffect", node->outgoing_links[0]->effect->effect_type_id());
+
+ expect_equal(expected_data, out_data, 3, 2);
+}
+
+// A fake input that can change its output colorspace and gamma between instantiation
+// and finalize.
+class UnknownColorspaceInput : public FlatInput {
+public:
+ UnknownColorspaceInput(ImageFormat format, MovitPixelFormat pixel_format, GLenum type, unsigned width, unsigned height)
+ : FlatInput(format, pixel_format, type, width, height),
+ overridden_color_space(format.color_space),
+ overridden_gamma_curve(format.gamma_curve) {}
+ virtual std::string effect_type_id() const { return "UnknownColorspaceInput"; }
+
+ void set_color_space(Colorspace colorspace) {
+ overridden_color_space = colorspace;
+ }
+ void set_gamma_curve(GammaCurve gamma_curve) {
+ overridden_gamma_curve = gamma_curve;
+ }
+ Colorspace get_color_space() const { return overridden_color_space; }
+ GammaCurve get_gamma_curve() const { return overridden_gamma_curve; }
+
+private:
+ Colorspace overridden_color_space;
+ GammaCurve overridden_gamma_curve;
+};
+
+TEST(EffectChainTester, HandlesInputChangingColorspace) {
+ const int size = 4;
+
+ float data[size] = {
+ 0.0,
+ 0.5,
+ 0.7,
+ 1.0,
+ };
+ float out_data[size];
+
+ EffectChainTester tester(NULL, 4, 1, FORMAT_GRAYSCALE);
+
+ // First say that we have sRGB, linear input.
+ ImageFormat format;
+ format.color_space = COLORSPACE_sRGB;
+ format.gamma_curve = GAMMA_LINEAR;
+
+ UnknownColorspaceInput *input = new UnknownColorspaceInput(format, FORMAT_GRAYSCALE, GL_FLOAT, 4, 1);
+ input->set_pixel_data(data);
+ tester.get_chain()->add_input(input);
+
+ // Now we change to Rec. 601 input.
+ input->set_color_space(COLORSPACE_REC_601_625);
+ input->set_gamma_curve(GAMMA_REC_601);
+
+ // Now ask for Rec. 601 output. Thus, our chain should now be a no-op.
+ tester.run(out_data, GL_RED, COLORSPACE_REC_601_625, GAMMA_REC_601);
+ expect_equal(data, out_data, 4, 1);
+}
+