InvertEffect() {}
virtual std::string effect_type_id() const { return "InvertEffect"; }
std::string output_fragment_shader() { return read_file("invert_effect.frag"); }
+
+ // A real invert would actually care about its alpha,
+ // but in this unit test, it only complicates things.
+ virtual AlphaHandling alpha_handling() const { return DONT_CARE_ALPHA_TYPE; }
};
// Like IdentityEffect, but rewrites itself out of the loop,
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);
+}
+
// Like RewritingToInvertEffect, but splicing in a MirrorEffect instead,
// which does not need linear light or sRGB primaries.
class RewritingToMirrorEffect : public Effect {
expect_equal(data, out_data, 256, 1);
}
+// The identity effect needs premultiplied alpha, and thus will get conversions on both sides.
+TEST(EffectChainTest, IdentityThroughAlphaConversions) {
+ const int size = 3;
+ float data[4 * size] = {
+ 0.8f, 0.0f, 0.0f, 0.5f,
+ 0.0f, 0.2f, 0.2f, 0.3f,
+ 0.1f, 0.0f, 1.0f, 1.0f,
+ };
+ float out_data[6];
+ EffectChainTester tester(data, size, 1, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, COLORSPACE_sRGB, GAMMA_LINEAR);
+ tester.get_chain()->add_effect(new IdentityEffect());
+ tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_LINEAR);
+
+ expect_equal(data, out_data, 4, size);
+}
+
+TEST(EffectChainTest, NoAlphaConversionsWhenPremultipliedAlphaNotNeeded) {
+ const int size = 3;
+ float data[4 * size] = {
+ 0.8f, 0.0f, 0.0f, 0.5f,
+ 0.0f, 0.2f, 0.2f, 0.3f,
+ 0.1f, 0.0f, 1.0f, 1.0f,
+ };
+ float expected_data[4 * size] = {
+ 0.1f, 0.0f, 1.0f, 1.0f,
+ 0.0f, 0.2f, 0.2f, 0.3f,
+ 0.8f, 0.0f, 0.0f, 0.5f,
+ };
+ float out_data[4 * size];
+ EffectChainTester tester(data, size, 1, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, COLORSPACE_sRGB, GAMMA_LINEAR);
+ RewritingToMirrorEffect *effect = new RewritingToMirrorEffect();
+ tester.get_chain()->add_effect(effect);
+ tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_LINEAR);
+
+ Node *node = effect->mirror_node;
+ ASSERT_EQ(1, node->incoming_links.size());
+ EXPECT_EQ(0, node->outgoing_links.size());
+ EXPECT_EQ("FlatInput", node->incoming_links[0]->effect->effect_type_id());
+
+ expect_equal(expected_data, out_data, 4, size);
+}
+
+// An input that outputs only blue, which has blank alpha.
+class BlueInput : public Input {
+public:
+ BlueInput() { register_int("needs_mipmaps", &needs_mipmaps); }
+ virtual std::string effect_type_id() const { return "IdentityEffect"; }
+ std::string output_fragment_shader() { return read_file("blue.frag"); }
+ virtual AlphaHandling alpha_handling() const { return OUTPUT_BLANK_ALPHA; }
+ virtual void finalize() {}
+ virtual bool can_output_linear_gamma() const { return true; }
+ virtual unsigned get_width() const { return 1; }
+ virtual unsigned get_height() const { return 1; }
+ virtual Colorspace get_color_space() const { return COLORSPACE_sRGB; }
+ virtual GammaCurve get_gamma_curve() const { return GAMMA_LINEAR; }
+
+private:
+ int needs_mipmaps;
+};
+
+// Like RewritingToInvertEffect, but splicing in a BlueInput instead,
+// which outputs blank alpha.
+class RewritingToBlueInput : public Input {
+public:
+ RewritingToBlueInput() { register_int("needs_mipmaps", &needs_mipmaps); }
+ virtual std::string effect_type_id() const { return "RewritingToBlueInput"; }
+ std::string output_fragment_shader() { EXPECT_TRUE(false); return read_file("identity.frag"); }
+ virtual void rewrite_graph(EffectChain *graph, Node *self) {
+ Node *blue_node = graph->add_node(new BlueInput());
+ graph->replace_receiver(self, blue_node);
+ graph->replace_sender(self, blue_node);
+
+ self->disabled = true;
+ this->blue_node = blue_node;
+ }
+
+ // Dummy values that we need to implement because we inherit from Input.
+ // Same as BlueInput.
+ virtual AlphaHandling alpha_handling() const { return OUTPUT_BLANK_ALPHA; }
+ virtual void finalize() {}
+ virtual bool can_output_linear_gamma() const { return true; }
+ virtual unsigned get_width() const { return 1; }
+ virtual unsigned get_height() const { return 1; }
+ virtual Colorspace get_color_space() const { return COLORSPACE_sRGB; }
+ virtual GammaCurve get_gamma_curve() const { return GAMMA_LINEAR; }
+
+ Node *blue_node;
+
+private:
+ int needs_mipmaps;
+};
+
+TEST(EffectChainTest, NoAlphaConversionsWithBlankAlpha) {
+ const int size = 3;
+ float data[4 * size] = {
+ 0.0f, 0.0f, 1.0f, 1.0f,
+ 0.0f, 0.0f, 1.0f, 1.0f,
+ 0.0f, 0.0f, 1.0f, 1.0f,
+ };
+ float out_data[4 * size];
+ EffectChainTester tester(NULL, size, 1);
+ RewritingToBlueInput *input = new RewritingToBlueInput();
+ tester.get_chain()->add_input(input);
+ tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_LINEAR, OUTPUT_ALPHA_PREMULTIPLIED);
+
+ Node *node = input->blue_node;
+ EXPECT_EQ(0, node->incoming_links.size());
+ EXPECT_EQ(0, node->outgoing_links.size());
+
+ expect_equal(data, out_data, 4, size);
+}
+
// Effectively scales down its input linearly by 4x (and repeating it),
// which is not attainable without mipmaps.
class MipmapNeedingEffect : public Effect {