//
// Note that this also contains the tests for some of the simpler effects.
+#include <GL/glew.h>
+
#include "effect_chain.h"
#include "flat_input.h"
#include "gtest/gtest.h"
#include "mirror_effect.h"
-#include "opengl.h"
+#include "resize_effect.h"
#include "test_util.h"
TEST(EffectChainTest, EmptyChain) {
virtual std::string effect_type_id() const { return "IdentityEffect"; }
std::string output_fragment_shader() { return read_file("identity.frag"); }
bool needs_texture_bounce() const { return true; }
+ AlphaHandling alpha_handling() const { return DONT_CARE_ALPHA_TYPE; }
};
TEST(EffectChainTest, TextureBouncePreservesIdentity) {
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,
-// splicing in a InvertEffect instead. Also stores the new node,
-// so we later can check that there are gamma conversion effects
-// on both sides.
-class RewritingToInvertEffect : public Effect {
+// splicing in a different effect instead. Also stores the new node,
+// so we later can check whatever properties we'd like about the graph.
+template<class T>
+class RewritingEffect : public Effect {
public:
- RewritingToInvertEffect() {}
- virtual std::string effect_type_id() const { return "RewritingToInvertEffect"; }
+ RewritingEffect() : effect(new T()), replaced_node(NULL) {}
+ virtual std::string effect_type_id() const { return "RewritingEffect[" + effect->effect_type_id() + "]"; }
std::string output_fragment_shader() { EXPECT_TRUE(false); return read_file("identity.frag"); }
virtual void rewrite_graph(EffectChain *graph, Node *self) {
- Node *invert_node = graph->add_node(new InvertEffect());
- graph->replace_receiver(self, invert_node);
- graph->replace_sender(self, invert_node);
-
+ replaced_node = graph->add_node(effect);
+ graph->replace_receiver(self, replaced_node);
+ graph->replace_sender(self, replaced_node);
self->disabled = true;
- this->invert_node = invert_node;
}
- Node *invert_node;
+ T *effect;
+ Node *replaced_node;
};
TEST(EffectChainTest, RewritingWorksAndGammaConversionsAreInserted) {
};
float out_data[6];
EffectChainTester tester(data, 3, 2, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_sRGB);
- RewritingToInvertEffect *effect = new RewritingToInvertEffect();
+ RewritingEffect<InvertEffect> *effect = new RewritingEffect<InvertEffect>();
tester.get_chain()->add_effect(effect);
tester.run(out_data, GL_RED, COLORSPACE_sRGB, GAMMA_sRGB);
- Node *node = effect->invert_node;
+ Node *node = effect->replaced_node;
ASSERT_EQ(1, node->incoming_links.size());
ASSERT_EQ(1, node->outgoing_links.size());
EXPECT_EQ("GammaExpansionEffect", node->incoming_links[0]->effect->effect_type_id());
expect_equal(expected_data, out_data, 3, 2);
}
-// Like RewritingToInvertEffect, but splicing in a MirrorEffect instead,
-// which does not need linear light.
-class RewritingToMirrorEffect : public Effect {
+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);
+ RewritingEffect<InvertEffect> *effect = new RewritingEffect<InvertEffect>();
+ tester.get_chain()->add_effect(effect);
+ tester.run(out_data, GL_RED, COLORSPACE_sRGB, GAMMA_sRGB);
+
+ Node *node = effect->replaced_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);
+ RewritingEffect<InvertEffect> *effect = new RewritingEffect<InvertEffect>();
+ tester.get_chain()->add_effect(effect);
+ tester.run(out_data, GL_RED, COLORSPACE_REC_601_525, GAMMA_LINEAR);
+
+ Node *node = effect->replaced_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:
- RewritingToMirrorEffect() {}
- virtual std::string effect_type_id() const { return "RewritingToMirrorEffect"; }
- std::string output_fragment_shader() { EXPECT_TRUE(false); return read_file("identity.frag"); }
- virtual void rewrite_graph(EffectChain *graph, Node *self) {
- Node *mirror_node = graph->add_node(new MirrorEffect());
- graph->replace_receiver(self, mirror_node);
- graph->replace_sender(self, mirror_node);
+ 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"; }
- self->disabled = true;
- this->mirror_node = mirror_node;
+ 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; }
- Node *mirror_node;
+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);
+}
+
TEST(EffectChainTest, NoGammaConversionsWhenLinearLightNotNeeded) {
float data[] = {
0.0f, 0.25f, 0.3f,
};
float out_data[6];
EffectChainTester tester(data, 3, 2, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_sRGB);
- RewritingToMirrorEffect *effect = new RewritingToMirrorEffect();
+ RewritingEffect<MirrorEffect> *effect = new RewritingEffect<MirrorEffect>();
tester.get_chain()->add_effect(effect);
tester.run(out_data, GL_RED, COLORSPACE_sRGB, GAMMA_sRGB);
- Node *node = effect->mirror_node;
+ Node *node = effect->replaced_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, 3, 2);
+}
+
+TEST(EffectChainTest, NoColorspaceConversionsWhensRGBPrimariesNotNeeded) {
+ float data[] = {
+ 0.0f, 0.25f, 0.3f,
+ 0.75f, 1.0f, 1.0f,
+ };
+ float expected_data[6] = {
+ 0.3f, 0.25f, 0.0f,
+ 1.0f, 1.0f, 0.75f,
+ };
+ float out_data[6];
+ EffectChainTester tester(data, 3, 2, FORMAT_GRAYSCALE, COLORSPACE_REC_601_525, GAMMA_LINEAR);
+ RewritingEffect<MirrorEffect> *effect = new RewritingEffect<MirrorEffect>();
+ tester.get_chain()->add_effect(effect);
+ tester.run(out_data, GL_RED, COLORSPACE_REC_601_525, GAMMA_LINEAR);
+
+ Node *node = effect->replaced_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(data, out_data, 256, 1);
}
+// Same, but uses the forward sRGB table from the GPU.
+TEST(EffectChainTest, IdentityThroughGPUsRGBConversions) {
+ unsigned char data[256];
+ float expected_data[256];
+ for (unsigned i = 0; i < 256; ++i) {
+ data[i] = i;
+ expected_data[i] = i / 255.0;
+ };
+ float out_data[256];
+ EffectChainTester tester(NULL, 256, 1);
+ tester.add_input(data, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_sRGB);
+ tester.get_chain()->add_effect(new IdentityEffect());
+ tester.run(out_data, GL_RED, COLORSPACE_sRGB, GAMMA_sRGB);
+
+ expect_equal(expected_data, out_data, 256, 1);
+}
+
// Same, for the Rec. 601/709 gamma curve.
TEST(EffectChainTest, IdentityThroughRec709) {
float data[256];
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);
+ RewritingEffect<MirrorEffect> *effect = new RewritingEffect<MirrorEffect>();
+ tester.get_chain()->add_effect(effect);
+ tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_LINEAR);
+
+ Node *node = effect->replaced_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 RewritingEffect<InvertEffect>, but splicing in a BlueInput instead,
+// which outputs blank alpha.
+class RewritingToBlueInput : public Input {
+public:
+ RewritingToBlueInput() : blue_node(NULL) { 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 {
+public:
+ MipmapNeedingEffect() {}
+ virtual bool needs_mipmaps() const { return true; }
+ virtual std::string effect_type_id() const { return "MipmapNeedingEffect"; }
+ std::string output_fragment_shader() { return read_file("mipmap_needing_effect.frag"); }
+ void set_gl_state(GLuint glsl_program_num, const std::string& prefix, unsigned *sampler_num)
+ {
+ glActiveTexture(GL_TEXTURE0);
+ check_error();
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+ check_error();
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+ check_error();
+ }
+};
+
+TEST(EffectChainTest, MipmapGenerationWorks) {
+ float data[] = { // In 4x4 blocks.
+ 1.0f, 0.0f, 0.0f, 0.0f,
+ 0.0f, 0.0f, 0.0f, 0.0f,
+ 0.0f, 0.0f, 0.0f, 0.0f,
+ 0.0f, 0.0f, 0.0f, 1.0f,
+
+ 0.0f, 0.0f, 0.0f, 0.0f,
+ 0.0f, 0.5f, 0.0f, 0.0f,
+ 0.0f, 0.0f, 1.0f, 0.0f,
+ 0.0f, 0.0f, 0.0f, 0.0f,
+
+ 1.0f, 1.0f, 1.0f, 1.0f,
+ 1.0f, 1.0f, 1.0f, 1.0f,
+ 1.0f, 1.0f, 1.0f, 1.0f,
+ 1.0f, 1.0f, 1.0f, 1.0f,
+
+ 0.0f, 0.0f, 0.0f, 0.0f,
+ 0.0f, 1.0f, 1.0f, 0.0f,
+ 0.0f, 1.0f, 1.0f, 0.0f,
+ 0.0f, 0.0f, 0.0f, 0.0f,
+ };
+ float expected_data[] = { // Repeated four times each way.
+ 0.125f, 0.125f, 0.125f, 0.125f,
+ 0.09375f, 0.09375f, 0.09375f, 0.09375f,
+ 1.0f, 1.0f, 1.0f, 1.0f,
+ 0.25f, 0.25f, 0.25f, 0.25f,
+
+ 0.125f, 0.125f, 0.125f, 0.125f,
+ 0.09375f, 0.09375f, 0.09375f, 0.09375f,
+ 1.0f, 1.0f, 1.0f, 1.0f,
+ 0.25f, 0.25f, 0.25f, 0.25f,
+
+ 0.125f, 0.125f, 0.125f, 0.125f,
+ 0.09375f, 0.09375f, 0.09375f, 0.09375f,
+ 1.0f, 1.0f, 1.0f, 1.0f,
+ 0.25f, 0.25f, 0.25f, 0.25f,
+
+ 0.125f, 0.125f, 0.125f, 0.125f,
+ 0.09375f, 0.09375f, 0.09375f, 0.09375f,
+ 1.0f, 1.0f, 1.0f, 1.0f,
+ 0.25f, 0.25f, 0.25f, 0.25f,
+ };
+ float out_data[4 * 16];
+ EffectChainTester tester(data, 4, 16, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_LINEAR);
+ tester.get_chain()->add_effect(new MipmapNeedingEffect());
+ tester.run(out_data, GL_RED, COLORSPACE_sRGB, GAMMA_LINEAR);
+
+ expect_equal(expected_data, out_data, 4, 16);
+}
+
+TEST(EffectChainTest, ResizeDownByFourThenUpByFour) {
+ float data[] = { // In 4x4 blocks.
+ 1.0f, 0.0f, 0.0f, 0.0f,
+ 0.0f, 0.0f, 0.0f, 0.0f,
+ 0.0f, 0.0f, 0.0f, 0.0f,
+ 0.0f, 0.0f, 0.0f, 1.0f,
+
+ 0.0f, 0.0f, 0.0f, 0.0f,
+ 0.0f, 0.5f, 0.0f, 0.0f,
+ 0.0f, 0.0f, 1.0f, 0.0f,
+ 0.0f, 0.0f, 0.0f, 0.0f,
+
+ 1.0f, 1.0f, 1.0f, 1.0f,
+ 1.0f, 1.0f, 1.0f, 1.0f,
+ 1.0f, 1.0f, 1.0f, 1.0f,
+ 1.0f, 1.0f, 1.0f, 1.0f,
+
+ 0.0f, 0.0f, 0.0f, 0.0f,
+ 0.0f, 1.0f, 1.0f, 0.0f,
+ 0.0f, 1.0f, 1.0f, 0.0f,
+ 0.0f, 0.0f, 0.0f, 0.0f,
+ };
+ float expected_data[] = { // Repeated four times horizontaly, interpolated vertically.
+ 0.1250f, 0.1250f, 0.1250f, 0.1250f,
+ 0.1250f, 0.1250f, 0.1250f, 0.1250f,
+ 0.1211f, 0.1211f, 0.1211f, 0.1211f,
+ 0.1133f, 0.1133f, 0.1133f, 0.1133f,
+ 0.1055f, 0.1055f, 0.1055f, 0.1055f,
+ 0.0977f, 0.0977f, 0.0977f, 0.0977f,
+ 0.2070f, 0.2070f, 0.2070f, 0.2070f,
+ 0.4336f, 0.4336f, 0.4336f, 0.4336f,
+ 0.6602f, 0.6602f, 0.6602f, 0.6602f,
+ 0.8867f, 0.8867f, 0.8867f, 0.8867f,
+ 0.9062f, 0.9062f, 0.9062f, 0.9062f,
+ 0.7188f, 0.7188f, 0.7188f, 0.7188f,
+ 0.5312f, 0.5312f, 0.5312f, 0.5312f,
+ 0.3438f, 0.3438f, 0.3438f, 0.3438f,
+ 0.2500f, 0.2500f, 0.2500f, 0.2500f,
+ 0.2500f, 0.2500f, 0.2500f, 0.2500f,
+ };
+ float out_data[4 * 16];
+
+ ResizeEffect *downscale = new ResizeEffect();
+ ASSERT_TRUE(downscale->set_int("width", 1));
+ ASSERT_TRUE(downscale->set_int("height", 4));
+
+ ResizeEffect *upscale = new ResizeEffect();
+ ASSERT_TRUE(upscale->set_int("width", 4));
+ ASSERT_TRUE(upscale->set_int("height", 16));
+
+ EffectChainTester tester(data, 4, 16, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_LINEAR);
+ tester.get_chain()->add_effect(downscale);
+ tester.get_chain()->add_effect(upscale);
+ tester.run(out_data, GL_RED, COLORSPACE_sRGB, GAMMA_LINEAR);
+
+ expect_equal(expected_data, out_data, 4, 16);
+}
+
+// An effect that multiplies with a constant. Used below.
+class MultiplyEffect : public Effect {
+public:
+ MultiplyEffect() { register_float("factor", &factor); }
+ virtual std::string effect_type_id() const { return "MultiplyEffect"; }
+ std::string output_fragment_shader() { return read_file("multiply.frag"); }
+ virtual AlphaHandling alpha_handling() const { return DONT_CARE_ALPHA_TYPE; }
+
+private:
+ float factor;
+};
+
+// An effect that adds its two inputs together. Used below.
+class AddEffect : public Effect {
+public:
+ AddEffect() {}
+ virtual std::string effect_type_id() const { return "AddEffect"; }
+ std::string output_fragment_shader() { return read_file("add.frag"); }
+ virtual unsigned num_inputs() const { return 2; }
+ virtual AlphaHandling alpha_handling() const { return DONT_CARE_ALPHA_TYPE; }
+};
+
+// Constructs the graph
+//
+// FlatInput |
+// / \ |
+// MultiplyEffect MultiplyEffect |
+// \ / |
+// AddEffect |
+//
+// and verifies that it gives the correct output.
+TEST(EffectChainTest, DiamondGraph) {
+ float data[] = {
+ 1.0f, 1.0f,
+ 1.0f, 0.0f,
+ };
+ float expected_data[] = {
+ 2.5f, 2.5f,
+ 2.5f, 0.0f,
+ };
+ float out_data[2 * 2];
+
+ MultiplyEffect *mul_half = new MultiplyEffect();
+ ASSERT_TRUE(mul_half->set_float("factor", 0.5f));
+
+ MultiplyEffect *mul_two = new MultiplyEffect();
+ ASSERT_TRUE(mul_two->set_float("factor", 2.0f));
+
+ EffectChainTester tester(NULL, 2, 2);
+
+ ImageFormat format;
+ format.color_space = COLORSPACE_sRGB;
+ format.gamma_curve = GAMMA_LINEAR;
+
+ FlatInput *input = new FlatInput(format, FORMAT_GRAYSCALE, GL_FLOAT, 2, 2);
+ input->set_pixel_data(data);
+
+ tester.get_chain()->add_input(input);
+ tester.get_chain()->add_effect(mul_half, input);
+ tester.get_chain()->add_effect(mul_two, input);
+ tester.get_chain()->add_effect(new AddEffect(), mul_half, mul_two);
+ tester.run(out_data, GL_RED, COLORSPACE_sRGB, GAMMA_LINEAR);
+
+ expect_equal(expected_data, out_data, 2, 2);
+}
+
+// Constructs the graph
+//
+// FlatInput |
+// / \ |
+// MultiplyEffect MultiplyEffect |
+// \ | |
+// \ BouncingIdentityEffect |
+// \ / |
+// AddEffect |
+//
+// and verifies that it gives the correct output.
+TEST(EffectChainTest, DiamondGraphWithOneInputUsedInTwoPhases) {
+ float data[] = {
+ 1.0f, 1.0f,
+ 1.0f, 0.0f,
+ };
+ float expected_data[] = {
+ 2.5f, 2.5f,
+ 2.5f, 0.0f,
+ };
+ float out_data[2 * 2];
+
+ MultiplyEffect *mul_half = new MultiplyEffect();
+ ASSERT_TRUE(mul_half->set_float("factor", 0.5f));
+
+ MultiplyEffect *mul_two = new MultiplyEffect();
+ ASSERT_TRUE(mul_two->set_float("factor", 2.0f));
+
+ BouncingIdentityEffect *bounce = new BouncingIdentityEffect();
+
+ EffectChainTester tester(NULL, 2, 2);
+
+ ImageFormat format;
+ format.color_space = COLORSPACE_sRGB;
+ format.gamma_curve = GAMMA_LINEAR;
+
+ FlatInput *input = new FlatInput(format, FORMAT_GRAYSCALE, GL_FLOAT, 2, 2);
+ input->set_pixel_data(data);
+
+ tester.get_chain()->add_input(input);
+ tester.get_chain()->add_effect(mul_half, input);
+ tester.get_chain()->add_effect(mul_two, input);
+ tester.get_chain()->add_effect(bounce, mul_two);
+ tester.get_chain()->add_effect(new AddEffect(), mul_half, bounce);
+ tester.run(out_data, GL_RED, COLORSPACE_sRGB, GAMMA_LINEAR);
+
+ expect_equal(expected_data, out_data, 2, 2);
+}
+
+TEST(EffectChainTest, EffectUsedTwiceOnlyGetsOneGammaConversion) {
+ float data[] = {
+ 0.735f, 0.0f,
+ 0.735f, 0.0f,
+ };
+ float expected_data[] = {
+ 0.0f, 0.5f, // 0.5 and not 1.0, since AddEffect doesn't clamp alpha properly.
+ 0.0f, 0.5f,
+ };
+ float out_data[2 * 2];
+
+ EffectChainTester tester(NULL, 2, 2);
+ tester.add_input(data, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_sRGB);
+
+ // MirrorEffect does not get linear light, so the conversions will be
+ // inserted after it, not before.
+ RewritingEffect<MirrorEffect> *effect = new RewritingEffect<MirrorEffect>();
+ tester.get_chain()->add_effect(effect);
+
+ Effect *identity1 = tester.get_chain()->add_effect(new IdentityEffect(), effect);
+ Effect *identity2 = tester.get_chain()->add_effect(new IdentityEffect(), effect);
+ tester.get_chain()->add_effect(new AddEffect(), identity1, identity2);
+ tester.run(out_data, GL_RED, COLORSPACE_sRGB, GAMMA_LINEAR);
+
+ expect_equal(expected_data, out_data, 2, 2);
+
+ Node *node = effect->replaced_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("GammaExpansionEffect", node->outgoing_links[0]->effect->effect_type_id());
+}
+
+TEST(EffectChainTest, EffectUsedTwiceOnlyGetsOneColorspaceConversion) {
+ float data[] = {
+ 0.5f, 0.0f,
+ 0.5f, 0.0f,
+ };
+ float expected_data[] = {
+ 0.0f, 0.5f, // 0.5 and not 1.0, since AddEffect doesn't clamp alpha properly.
+ 0.0f, 0.5f,
+ };
+ float out_data[2 * 2];
+
+ EffectChainTester tester(NULL, 2, 2);
+ tester.add_input(data, FORMAT_GRAYSCALE, COLORSPACE_REC_601_625, GAMMA_LINEAR);
+
+ // MirrorEffect does not get linear light, so the conversions will be
+ // inserted after it, not before.
+ RewritingEffect<MirrorEffect> *effect = new RewritingEffect<MirrorEffect>();
+ tester.get_chain()->add_effect(effect);
+
+ Effect *identity1 = tester.get_chain()->add_effect(new IdentityEffect(), effect);
+ Effect *identity2 = tester.get_chain()->add_effect(new IdentityEffect(), effect);
+ tester.get_chain()->add_effect(new AddEffect(), identity1, identity2);
+ tester.run(out_data, GL_RED, COLORSPACE_sRGB, GAMMA_LINEAR);
+
+ expect_equal(expected_data, out_data, 2, 2);
+
+ Node *node = effect->replaced_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("ColorspaceConversionEffect", node->outgoing_links[0]->effect->effect_type_id());
+}
projects / movit / blobdiff