move skpdiff into tools

experimental/skpdiff/SkDifferentPixelsMetric_opencl.cpp

Index: experimental/skpdiff/SkDifferentPixelsMetric_opencl.cpp
diff --git a/experimental/skpdiff/SkDifferentPixelsMetric_opencl.cpp b/experimental/skpdiff/SkDifferentPixelsMetric_opencl.cpp
deleted file mode 100644
index f2a02c1c1823972793a9af7685910e6d46ec4d06..0000000000000000000000000000000000000000
--- a/experimental/skpdiff/SkDifferentPixelsMetric_opencl.cpp
+++ /dev/null
@@ -1,170 +0,0 @@
-/*
- * Copyright 2013 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "SkBitmap.h"
-
-#include "SkDifferentPixelsMetric.h"
-#include "skpdiff_util.h"
-
-static const char kDifferentPixelsKernelSource[] =
-    "#pragma OPENCL_EXTENSION cl_khr_global_int32_base_atomics                  \n"
-    "                                                                           \n"
-    "const sampler_t gInSampler = CLK_NORMALIZED_COORDS_FALSE |                 \n"
-    "                             CLK_ADDRESS_CLAMP_TO_EDGE   |                 \n"
-    "                             CLK_FILTER_NEAREST;                           \n"
-    "                                                                           \n"
-    "__kernel void diff(read_only image2d_t baseline, read_only image2d_t test, \n"
-    "                   __global int* result, __global int2* poi) {             \n"
-    "    int2 coord = (int2)(get_global_id(0), get_global_id(1));               \n"
-    "    uint4 baselinePixel = read_imageui(baseline, gInSampler, coord);       \n"
-    "    uint4 testPixel = read_imageui(test, gInSampler, coord);               \n"
-    "    if (baselinePixel.x != testPixel.x ||                                  \n"
-    "        baselinePixel.y != testPixel.y ||                                  \n"
-    "        baselinePixel.z != testPixel.z ||                                  \n"
-    "        baselinePixel.w != testPixel.w) {                                  \n"
-    "                                                                           \n"
-    "        int poiIndex = atomic_inc(result);                                 \n"
-    "        poi[poiIndex] = coord;                                             \n"
-    "    }                                                                      \n"
-    "}                                                                          \n";
-
-struct SkDifferentPixelsMetric::QueuedDiff {
-    bool finished;
-    double result;
-    int numDiffPixels;
-    SkIPoint* poi;
-    cl_mem baseline;
-    cl_mem test;
-    cl_mem resultsBuffer;
-    cl_mem poiBuffer;
-};
-
-const char* SkDifferentPixelsMetric::getName() {
-    return "different_pixels";
-}
-
-int SkDifferentPixelsMetric::queueDiff(SkBitmap* baseline, SkBitmap* test) {
-    int diffID = fQueuedDiffs.count();
-    double startTime = get_seconds();
-    QueuedDiff* diff = fQueuedDiffs.push();
-
-    // If we never end up running the kernel, include some safe defaults in the result.
-    diff->finished = false;
-    diff->result = -1.0;
-    diff->numDiffPixels = 0;
-    diff->poi = NULL;
-
-    // Ensure the images are comparable
-    if (baseline->width() != test->width() || baseline->height() != test->height() ||
-        baseline->width() <= 0 || baseline->height() <= 0 ||
-        baseline->config() != test->config()) {
-        diff->finished = true;
-        return diffID;
-    }
-
-    // Upload images to the CL device
-    if (!this->makeImage2D(baseline, &diff->baseline) || !this->makeImage2D(test, &diff->test)) {
-        diff->finished = true;
-        fIsGood = false;
-        return -1;
-    }
-
-    // A small hack that makes calculating percentage difference easier later on.
-    diff->result = 1.0 / ((double)baseline->width() * baseline->height());
-
-    // Make a buffer to store results into. It must be initialized with pointers to memory.
-    static const int kZero = 0;
-    // We know OpenCL won't write to it because we use CL_MEM_COPY_HOST_PTR
-    diff->resultsBuffer = clCreateBuffer(fContext, CL_MEM_READ_WRITE | CL_MEM_COPY_HOST_PTR,
-                                         sizeof(int), (int*)&kZero, NULL);
-
-    diff->poiBuffer = clCreateBuffer(fContext, CL_MEM_WRITE_ONLY,
-                                     sizeof(int) * 2 * baseline->width() * baseline->height(),
-                                     NULL, NULL);
-
-    // Set all kernel arguments
-    cl_int setArgErr = clSetKernelArg(fKernel, 0, sizeof(cl_mem), &diff->baseline);
-    setArgErr       |= clSetKernelArg(fKernel, 1, sizeof(cl_mem), &diff->test);
-    setArgErr       |= clSetKernelArg(fKernel, 2, sizeof(cl_mem), &diff->resultsBuffer);
-    setArgErr       |= clSetKernelArg(fKernel, 3, sizeof(cl_mem), &diff->poiBuffer);
-    if (CL_SUCCESS != setArgErr) {
-        SkDebugf("Set arg failed: %s\n", cl_error_to_string(setArgErr));
-        fIsGood = false;
-        return -1;
-    }
-
-    // Queue this diff on the CL device
-    cl_event event;
-    const size_t workSize[] = { baseline->width(), baseline->height() };
-    cl_int enqueueErr;
-    enqueueErr = clEnqueueNDRangeKernel(fCommandQueue, fKernel, 2, NULL, workSize,
-                                        NULL, 0, NULL, &event);
-    if (CL_SUCCESS != enqueueErr) {
-        SkDebugf("Enqueue failed: %s\n", cl_error_to_string(enqueueErr));
-        fIsGood = false;
-        return -1;
-    }
-
-    // This makes things totally synchronous. Actual queue is not ready yet
-    clWaitForEvents(1, &event);
-    diff->finished = true;
-
-    // Immediate read back the results
-    clEnqueueReadBuffer(fCommandQueue, diff->resultsBuffer, CL_TRUE, 0,
-                        sizeof(int), &diff->numDiffPixels, 0, NULL, NULL);
-    diff->result *= (double)diff->numDiffPixels;
-    diff->result = (1.0 - diff->result);
-
-    // Reading a buffer of size zero can cause issues on some (Mac) OpenCL platforms.
-    if (diff->numDiffPixels > 0) {
-        diff->poi = SkNEW_ARRAY(SkIPoint, diff->numDiffPixels);
-        clEnqueueReadBuffer(fCommandQueue, diff->poiBuffer, CL_TRUE, 0,
-                        sizeof(SkIPoint) * diff->numDiffPixels, diff->poi, 0, NULL, NULL);
-    }
-
-    // Release all the buffers created
-    clReleaseMemObject(diff->poiBuffer);
-    clReleaseMemObject(diff->resultsBuffer);
-    clReleaseMemObject(diff->baseline);
-    clReleaseMemObject(diff->test);
-
-    SkDebugf("Time: %f\n", (get_seconds() - startTime));
-
-    return diffID;
-}
-
-void SkDifferentPixelsMetric::deleteDiff(int id) {
-    QueuedDiff* diff = &fQueuedDiffs[id];
-    if (NULL != diff->poi) {
-        SkDELETE_ARRAY(diff->poi);
-        diff->poi = NULL;
-    }
-}
-
-bool SkDifferentPixelsMetric::isFinished(int id) {
-    return fQueuedDiffs[id].finished;
-}
-
-double SkDifferentPixelsMetric::getResult(int id) {
-    return fQueuedDiffs[id].result;
-}
-
-int SkDifferentPixelsMetric::getPointsOfInterestCount(int id) {
-    return fQueuedDiffs[id].numDiffPixels;
-}
-
-SkIPoint* SkDifferentPixelsMetric::getPointsOfInterest(int id) {
-    return fQueuedDiffs[id].poi;
-}
-
-bool SkDifferentPixelsMetric::onInit() {
-    if (!this->loadKernelSource(kDifferentPixelsKernelSource, "diff", &fKernel)) {
-        return false;
-    }
-
-    return true;
-}