When was SkPDiff last used?

tools/skpdiff/SkCLImageDiffer.cpp

-/*
- * 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 <cstring>
-
-#include "SkBitmap.h"
-#include "SkStream.h"
-
-#include "SkCLImageDiffer.h"
-#include "skpdiff_util.h"
-
-SkCLImageDiffer::SkCLImageDiffer() {
-    fIsGood = false;
-}
-
-bool SkCLImageDiffer::init(cl_device_id device, cl_context context) {
-    fContext = context;
-    fDevice = device;
-
-    cl_int queueErr;
-    fCommandQueue = clCreateCommandQueue(fContext, fDevice, 0, &queueErr);
-    if (CL_SUCCESS != queueErr) {
-        SkDebugf("Command queue creation failed: %s\n", cl_error_to_string(queueErr));
-        fIsGood = false;
-        return false;
-    }
-
-    fIsGood = this->onInit();
-    return fIsGood;
-}
-
-bool SkCLImageDiffer::loadKernelFile(const char file[], const char name[], cl_kernel* kernel) {
-    // Open the kernel source file
-    SkFILEStream sourceStream(file);
-    if (!sourceStream.isValid()) {
-        SkDebugf("Failed to open kernel source file");
-        return false;
-    }
-
-    return loadKernelStream(&sourceStream, name, kernel);
-}
-
-bool SkCLImageDiffer::loadKernelStream(SkStream* stream, const char name[], cl_kernel* kernel) {
-    // Read the kernel source into memory
-    SkString sourceString;
-    sourceString.resize(stream->getLength());
-    size_t bytesRead = stream->read(sourceString.writable_str(), sourceString.size());
-    if (bytesRead != sourceString.size()) {
-        SkDebugf("Failed to read kernel source file");
-        return false;
-    }
-
-    return loadKernelSource(sourceString.c_str(), name, kernel);
-}
-
-bool SkCLImageDiffer::loadKernelSource(const char source[], const char name[], cl_kernel* kernel) {
-    // Build the kernel source
-    size_t sourceLen = strlen(source);
-    cl_program program = clCreateProgramWithSource(fContext, 1, &source, &sourceLen, nullptr);
-    cl_int programErr = clBuildProgram(program, 1, &fDevice, "", nullptr, nullptr);
-    if (CL_SUCCESS != programErr) {
-        SkDebugf("Program creation failed: %s\n", cl_error_to_string(programErr));
-
-        // Attempt to get information about why the build failed
-        char buildLog[4096];
-        clGetProgramBuildInfo(program, fDevice, CL_PROGRAM_BUILD_LOG, sizeof(buildLog),
-                              buildLog, nullptr);
-        SkDebugf("Build log: %s\n", buildLog);
-
-        return false;
-    }
-
-    cl_int kernelErr;
-    *kernel = clCreateKernel(program, name, &kernelErr);
-    if (CL_SUCCESS != kernelErr) {
-        SkDebugf("Kernel creation failed: %s\n", cl_error_to_string(kernelErr));
-        return false;
-    }
-
-    return true;
-}
-
-bool SkCLImageDiffer::makeImage2D(SkBitmap* bitmap, cl_mem* image) const {
-    cl_int imageErr;
-    cl_image_format bitmapFormat;
-    switch (bitmap->colorType()) {
-        case kAlpha_8_SkColorType:
-            bitmapFormat.image_channel_order = CL_A;
-            bitmapFormat.image_channel_data_type = CL_UNSIGNED_INT8;
-            break;
-        case kRGB_565_SkColorType:
-            bitmapFormat.image_channel_order = CL_RGB;
-            bitmapFormat.image_channel_data_type = CL_UNORM_SHORT_565;
-            break;
-        case kN32_SkColorType:
-            bitmapFormat.image_channel_order = CL_RGBA;
-            bitmapFormat.image_channel_data_type = CL_UNSIGNED_INT8;
-            break;
-        default:
-            SkDebugf("Image format is unsupported\n");
-            return false;
-    }
-
-    // Upload the bitmap data to OpenCL
-    bitmap->lockPixels();
-    *image = clCreateImage2D(fContext, CL_MEM_READ_ONLY | CL_MEM_COPY_HOST_PTR,
-                             &bitmapFormat, bitmap->width(), bitmap->height(),
-                             bitmap->rowBytes(), bitmap->getPixels(),
-                             &imageErr);
-    bitmap->unlockPixels();
-
-    if (CL_SUCCESS != imageErr) {
-        SkDebugf("Input image creation failed: %s\n", cl_error_to_string(imageErr));
-        return false;
-    }
-
-    return true;
-}