Output the chained shaders to temporary files instead of to stdout, since it's near...

[movit] / effect_chain_test.cpp

diff --git a/effect_chain_test.cpp b/effect_chain_test.cpp
index c8fd946e6717fdd523048e58005b5f68e73d0d75..e5ca1cc1f28423c2ae8e8779695fdd3508c269e6 100644 (file)
--- a/effect_chain_test.cpp
+++ b/effect_chain_test.cpp
@@ -1,109 +1,82 @@
 // Unit tests for EffectChain.
+//
+// Note that this also contains the tests for some of the simpler effects.
 
 #include "effect_chain.h"
 #include "flat_input.h"
-#include "sandbox_effect.h"
-#include "opengl.h"
 #include "gtest/gtest.h"
+#include "mirror_effect.h"
+#include "opengl.h"
+#include "test_util.h"
 
-#include <stdio.h>
-#include <math.h>
+TEST(EffectChainTest, EmptyChain) {
+       float data[] = {
+               0.0f, 0.25f, 0.3f,
+               0.75f, 1.0f, 1.0f,
+       };
+       float out_data[6];
+       EffectChainTester tester(data, 3, 2, COLORSPACE_sRGB, GAMMA_LINEAR);
+       tester.run(out_data, COLORSPACE_sRGB, GAMMA_LINEAR);
 
-#include <algorithm>
+       expect_equal(data, out_data, 3, 2);
+}
 
-class EffectChainTester {
+// An effect that does nothing.
+class IdentityEffect : public Effect {
 public:
-       EffectChainTester(const float *data, unsigned width, unsigned height, ColorSpace color_space, GammaCurve gamma_curve)
-               : chain(width, height), width(width), height(height)
-       {
-               ImageFormat format;
-               format.color_space = color_space;
-               format.gamma_curve = gamma_curve;
-       
-               FlatInput *input = new FlatInput(format, FORMAT_GRAYSCALE, GL_FLOAT, width, height);
-               input->set_pixel_data(data);
-               chain.add_input(input);
-       }
-
-       EffectChain *get_chain() { return &chain; }
-
-       void run(float *out_data, ColorSpace color_space, GammaCurve gamma_curve)
-       {
-               ImageFormat format;
-               format.color_space = color_space;
-               format.gamma_curve = gamma_curve;
-               chain.add_output(format);
-               chain.finalize();
-
-               glViewport(0, 0, width, height);
-               chain.render_to_screen();
-
-               glReadPixels(0, 0, width, height, GL_RED, GL_FLOAT, out_data);
-
-               // Flip upside-down to compensate for different origin.
-               for (unsigned y = 0; y < height / 2; ++y) {
-                       unsigned flip_y = height - y - 1;
-                       for (unsigned x = 0; x < width; ++x) {
-                               std::swap(out_data[y * width + x], out_data[flip_y * width + x]);
-                       }
-               }
-       }
-
-private:
-       EffectChain chain;
-       unsigned width, height;
+       IdentityEffect() {}
+       virtual std::string effect_type_id() const { return "IdentityEffect"; }
+       std::string output_fragment_shader() { return read_file("identity.frag"); }
 };
 
-void expect_equal(const float *ref, const float *result, unsigned width, unsigned height)
-{
-       float largest_difference = -1.0f;
-       float squared_difference = 0.0f;
-
-       for (unsigned y = 0; y < height; ++y) {
-               for (unsigned x = 0; x < width; ++x) {
-                       float diff = ref[y * width + x] - result[y * width + x];
-                       largest_difference = std::max(largest_difference, fabsf(diff));
-                       squared_difference += diff * diff;
-               }
-       }
-
-       const float largest_difference_limit = 1.5 / 255.0;
-       const float rms_limit = 0.5 / 255.0;
-
-       EXPECT_LT(largest_difference, largest_difference_limit);
+TEST(EffectChainTest, Identity) {
+       float data[] = {
+               0.0f, 0.25f, 0.3f,
+               0.75f, 1.0f, 1.0f,
+       };
+       float out_data[6];
+       EffectChainTester tester(data, 3, 2, COLORSPACE_sRGB, GAMMA_LINEAR);
+       tester.get_chain()->add_effect(new IdentityEffect());
+       tester.run(out_data, COLORSPACE_sRGB, GAMMA_LINEAR);
 
-       float rms = sqrt(squared_difference) / (width * height);
-       EXPECT_LT(rms, rms_limit);
+       expect_equal(data, out_data, 3, 2);
+}
 
-       if (largest_difference >= largest_difference_limit || rms >= rms_limit) {
-               fprintf(stderr, "Dumping matrices for easier debugging, since at least one test failed.\n");
+// An effect that does nothing, but requests texture bounce.
+class BouncingIdentityEffect : public Effect {
+public:
+       BouncingIdentityEffect() {}
+       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; }
+};
 
-               fprintf(stderr, "Reference:\n");
-               for (unsigned y = 0; y < height; ++y) {
-                       for (unsigned x = 0; x < width; ++x) {
-                               fprintf(stderr, "%7.4f ", ref[y * width + x]);
-                       }
-                       fprintf(stderr, "\n");
-               }
+TEST(EffectChainTest, TextureBouncePreservesIdentity) {
+       float data[] = {
+               0.0f, 0.25f, 0.3f,
+               0.75f, 1.0f, 1.0f,
+       };
+       float out_data[6];
+       EffectChainTester tester(data, 3, 2, COLORSPACE_sRGB, GAMMA_LINEAR);
+       tester.get_chain()->add_effect(new BouncingIdentityEffect());
+       tester.run(out_data, COLORSPACE_sRGB, GAMMA_LINEAR);
 
-               fprintf(stderr, "\nResult:\n");
-               for (unsigned y = 0; y < height; ++y) {
-                       for (unsigned x = 0; x < width; ++x) {
-                               fprintf(stderr, "%7.4f ", result[y * width + x]);
-                       }
-                       fprintf(stderr, "\n");
-               }
-       }
+       expect_equal(data, out_data, 3, 2);
 }
 
-TEST(EffectChainTest, Identity) {
+TEST(MirrorTest, BasicTest) {
        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, COLORSPACE_sRGB, GAMMA_LINEAR);
+       tester.get_chain()->add_effect(new MirrorEffect());
        tester.run(out_data, COLORSPACE_sRGB, GAMMA_LINEAR);
 
-       expect_equal(data, out_data, 3, 2);
+       expect_equal(expected_data, out_data, 3, 2);
 }