Add exact version of qcms used by Chrome for testing and comparison

third_party/qcms/src/tests/qcms_test_tetra_clut_rgba.c

Index: third_party/qcms/src/tests/qcms_test_tetra_clut_rgba.c
diff --git a/third_party/qcms/src/tests/qcms_test_tetra_clut_rgba.c b/third_party/qcms/src/tests/qcms_test_tetra_clut_rgba.c
new file mode 100644
index 0000000000000000000000000000000000000000..81b6ee3287615cce3cd1683a963a1eb9c313f5e4
--- /dev/null
+++ b/third_party/qcms/src/tests/qcms_test_tetra_clut_rgba.c
@@ -0,0 +1,180 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the Chromium LICENSE file.
+
+#include "qcms.h"
+#include "qcms_test_util.h"
+#include "timing.h"
+
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+// External qcms tetra clut interpolators.
+
+extern void qcms_transform_data_tetra_clut_rgba(qcms_transform *transform,
+                                                unsigned char *src,
+                                                unsigned char *dest,
+                                                size_t length,
+                                                qcms_format_type output_format);
+
+#ifdef SSE2_ENABLE
+extern void qcms_transform_data_tetra_clut_rgba_sse2(qcms_transform *transform,
+                                                     unsigned char *src,
+                                                     unsigned char *dest,
+                                                     size_t length,
+                                                     qcms_format_type output_format);
+#else
+void qcms_transform_data_tetra_clut_rgba_dummy(qcms_transform *transform,
+                                               unsigned char *src,
+                                               unsigned char *dest,
+                                               size_t length,
+                                               qcms_format_type output_format)
+{
+    (void)(transform);
+    (void)(src);
+    (void)(dest);
+    (void)(length);
+    (void)(output_format);
+}
+#endif
+
+static float *create_lut(size_t lutSize)
+{
+    float *lut = malloc(lutSize * sizeof(float));
+    size_t i;
+
+    for (i = 0; i < lutSize; ++i) {
+        lut[i] = (rand() & 255) * (1.0f / 255.0f);
+    }
+
+    return lut;
+}
+
+static int diffs;
+
+static int validate(unsigned char *dst0, unsigned char *dst1, size_t length, int limit, const size_t pixel_size)
+{
+    size_t bytes = length * pixel_size;
+    size_t i;
+
+    // Compare dst0/dst0 byte-by-byte, allowing for minor differences due
+    // to SSE rounding modes (controlled by the limit argument).
+
+    if (limit < 0)
+        limit = 255; // Ignore all differences.
+
+    for (diffs = 0, i = 0; i < bytes; ++i) {
+        if (abs((int)dst0[i] - (int)dst1[i]) > limit) {
+            ++diffs;
+        }
+    }
+
+    return !diffs;
+}
+
+static int qcms_test_tetra_clut_rgba(size_t width,
+        size_t height,
+        int iterations,
+        const char *in_profile,
+        const char *out_profile,
+        const int force_software)
+{
+    qcms_transform transform0, transform1;
+    qcms_format_type format = {2, 0};
+    uint16_t samples = 33;
+    size_t lutSize;
+    float *lut0, *lut1;
+
+    const size_t length = width * height;
+    const size_t pixel_size = 4;
+
+    double time0, time1;
+    int i;
+
+    printf("Test qcms clut transforms for %d iterations\n", iterations);
+    printf("Test image size %u x %u pixels\n", (unsigned) width, (unsigned) height);
+    fflush(stdout);
+
+    srand(0);
+    seconds();
+
+    memset(&transform0, 0, sizeof(transform0));
+    memset(&transform1, 0, sizeof(transform1));
+
+    transform0.grid_size = samples;
+    transform1.grid_size = samples;
+
+    transform0.transform_flags = 0;
+    transform1.transform_flags = 0;
+
+    lutSize = 3 * samples * samples * samples;
+    lut0 = create_lut(lutSize);
+    lut1 = (float *)malloc(lutSize * sizeof(float));
+    memcpy(lut1, lut0, lutSize * sizeof(float));
+
+    transform0.r_clut = &lut0[0];
+    transform0.g_clut = &lut0[1];
+    transform0.b_clut = &lut0[2];
+
+    transform1.r_clut = &lut1[0];
+    transform1.g_clut = &lut1[1];
+    transform1.b_clut = &lut1[2];
+
+    // Re-generate and use different data sources during the iteration loop
+    // to avoid compiler / cache optimizations that may affect performance.
+
+    time0 = 0.0;
+    time1 = 0.0;
+
+    for (i = 0; i < iterations; ++i) {
+        unsigned char *src0 = (unsigned char *)calloc(length, pixel_size);
+        unsigned char *src1 = (unsigned char *)calloc(length, pixel_size);
+        unsigned char *dst0 = (unsigned char *)calloc(length, pixel_size);
+        unsigned char *dst1 = (unsigned char *)calloc(length, pixel_size);
+
+        generate_source_uint8_t(src0, length, pixel_size);
+        memcpy(src1, src0, length * pixel_size);
+
+#define TRANSFORM_TEST0 qcms_transform_data_tetra_clut_rgba
+#ifdef SSE2_ENABLE
+#define TRANSFORM_TEST1 qcms_transform_data_tetra_clut_rgba_sse2
+#else
+#define TRANSFORM_TEST1 qcms_transform_data_tetra_clut_rgba_dummy
+#endif
+
+        TIME(TRANSFORM_TEST0(&transform0, src0, dst0, length, format), &time0);
+        TIME(TRANSFORM_TEST1(&transform1, src1, dst1, length, format), &time1);
+
+        if (!validate(dst0, dst1, length, 0, pixel_size)) {
+            fprintf(stderr, "Invalid transform output: %d diffs\n", diffs);
+        }
+
+        free(src0);
+        free(src1);
+        free(dst0);
+        free(dst1);
+    }
+
+#define STRINGIZE(s) #s
+#define STRING(s) STRINGIZE(s)
+
+    printf("%.6lf (avg %.6lf) seconds " STRING(TRANSFORM_TEST0) "\n",
+            time0, time0 / iterations);
+    printf("%.6lf (avg %.6lf) seconds " STRING(TRANSFORM_TEST1) "\n",
+            time1, time1 / iterations);
+    printf("%.6lf speedup after %d iterations\n\n",
+            time0 / time1, iterations);
+
+    free(lut0);
+    free(lut1);
+
+    return diffs;
+}
+
+struct qcms_test_case qcms_test_tetra_clut_rgba_info = {
+        "qcms_test_tetra_clut_rgba",
+        qcms_test_tetra_clut_rgba,
+        QCMS_TEST_DISABLED
+};