GrAHardwareBufferTest.cpp

Go to the documentation of this file.

/*
 * Copyright 2018 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
// This is a GPU-backend specific test. It relies on static initializers to work
 
#include "include/core/SkTypes.h"
 
#if defined(SK_GANESH) && defined(SK_BUILD_FOR_ANDROID) && __ANDROID_API__ >= 26
 
#include "include/android/SkImageAndroid.h"
#include "include/android/SkSurfaceAndroid.h"
#include "include/core/SkBitmap.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColorSpace.h"
#include "include/core/SkImage.h"
#include "include/core/SkSurface.h"
#include "include/gpu/GrDirectContext.h"
#include "include/gpu/ganesh/SkSurfaceGanesh.h"
#include "src/gpu/ganesh/GrAHardwareBufferImageGenerator.h"
#include "src/gpu/ganesh/GrDirectContextPriv.h"
#include "src/gpu/ganesh/GrGpu.h"
#include "tests/Test.h"
#include "tools/gpu/GrContextFactory.h"
 
#include <android/hardware_buffer.h>
#include <cinttypes>
 
static const int DEV_W = 16, DEV_H = 16;
 
static SkPMColor get_src_color(int x, int y) {
    SkASSERT(x >= 0 && x < DEV_W);
    SkASSERT(y >= 0 && y < DEV_H);
 
    U8CPU r = x;
    U8CPU g = y;
    U8CPU b = 0xc;
 
    U8CPU a = 0xff;
    switch ((x+y) % 5) {
        case 0:
            a = 0xff;
            break;
        case 1:
            a = 0x80;
            break;
        case 2:
            a = 0xCC;
            break;
        case 4:
            a = 0x01;
            break;
        case 3:
            a = 0x00;
            break;
    }
    a = 0xff;
    return SkPremultiplyARGBInline(a, r, g, b);
}
 
static SkBitmap make_src_bitmap() {
    static SkBitmap bmp;
    if (bmp.isNull()) {
        bmp.allocN32Pixels(DEV_W, DEV_H);
        intptr_t pixels = reinterpret_cast<intptr_t>(bmp.getPixels());
        for (int y = 0; y < DEV_H; ++y) {
            for (int x = 0; x < DEV_W; ++x) {
                SkPMColor* pixel = reinterpret_cast<SkPMColor*>(
                        pixels + y * bmp.rowBytes() + x * bmp.bytesPerPixel());
                *pixel = get_src_color(x, y);
            }
        }
    }
    return bmp;
}
 
static bool check_read(skiatest::Reporter* reporter, const SkBitmap& expectedBitmap,
                       const SkBitmap& actualBitmap) {
    bool result = true;
    for (int y = 0; y < DEV_H && result; ++y) {
        for (int x = 0; x < DEV_W && result; ++x) {
            const uint32_t srcPixel = *expectedBitmap.getAddr32(x, y);
            const uint32_t dstPixel = *actualBitmap.getAddr32(x, y);
            if (srcPixel != dstPixel) {
                ERRORF(reporter, "Expected readback pixel (%d, %d) value 0x%08x, got 0x%08x.",
                       x, y,  srcPixel, dstPixel);
                result = false;
            }/* else {
                SkDebugf("Got good pixel (%d, %d) value 0x%08x, got 0x%08x.\n",
                       x, y,  srcPixel, dstPixel);
            }*/
        }
    }
    return result;
}
 
static void cleanup_resources(AHardwareBuffer* buffer) {
    if (buffer) {
        AHardwareBuffer_release(buffer);
    }
}
 
static void basic_draw_test_helper(skiatest::Reporter* reporter,
                                   const sk_gpu_test::ContextInfo& info,
                                   GrSurfaceOrigin surfaceOrigin) {
 
    auto context = info.directContext();
    if (!context->priv().caps()->supportsAHardwareBufferImages()) {
        return;
    }
 
    ///////////////////////////////////////////////////////////////////////////
    // Setup SkBitmaps
    ///////////////////////////////////////////////////////////////////////////
 
    const SkBitmap srcBitmap = make_src_bitmap();
 
    ///////////////////////////////////////////////////////////////////////////
    // Setup AHardwareBuffer
    ///////////////////////////////////////////////////////////////////////////
 
    AHardwareBuffer* buffer = nullptr;
 
    AHardwareBuffer_Desc hwbDesc;
    hwbDesc.width = DEV_W;
    hwbDesc.height = DEV_H;
    hwbDesc.layers = 1;
    hwbDesc.usage = AHARDWAREBUFFER_USAGE_CPU_READ_NEVER |
                    AHARDWAREBUFFER_USAGE_CPU_WRITE_OFTEN |
                    AHARDWAREBUFFER_USAGE_GPU_SAMPLED_IMAGE;
    hwbDesc.format = AHARDWAREBUFFER_FORMAT_R8G8B8A8_UNORM;
    // The following three are not used in the allocate
    hwbDesc.stride = 0;
    hwbDesc.rfu0= 0;
    hwbDesc.rfu1= 0;
 
    if (int error = AHardwareBuffer_allocate(&hwbDesc, &buffer)) {
        ERRORF(reporter, "Failed to allocated hardware buffer, error: %d", error);
        cleanup_resources(buffer);
        return;
    }
 
    // Get actual desc for allocated buffer so we know the stride for uploading cpu data.
    AHardwareBuffer_describe(buffer, &hwbDesc);
 
    uint32_t* bufferAddr;
    if (AHardwareBuffer_lock(buffer, AHARDWAREBUFFER_USAGE_CPU_WRITE_OFTEN, -1, nullptr,
                             reinterpret_cast<void**>(&bufferAddr))) {
        ERRORF(reporter, "Failed to lock hardware buffer");
        cleanup_resources(buffer);
        return;
    }
 
    int bbp = srcBitmap.bytesPerPixel();
    uint32_t* src = (uint32_t*)srcBitmap.getPixels();
    int nextLineStep = DEV_W;
    if (surfaceOrigin == kBottomLeft_GrSurfaceOrigin) {
        nextLineStep = -nextLineStep;
        src += (DEV_H-1)*DEV_W;
    }
    uint32_t* dst = bufferAddr;
    for (int y = 0; y < DEV_H; ++y) {
        memcpy(dst, src, DEV_W * bbp);
        src += nextLineStep;
        dst += hwbDesc.stride;
    }
    AHardwareBuffer_unlock(buffer, nullptr);
 
    ///////////////////////////////////////////////////////////////////////////
    // Wrap AHardwareBuffer in SkImage
    ///////////////////////////////////////////////////////////////////////////
 
    sk_sp<SkImage> image = SkImages::DeferredFromAHardwareBuffer(
            buffer, kPremul_SkAlphaType, nullptr, surfaceOrigin);
    REPORTER_ASSERT(reporter, image);
 
    ///////////////////////////////////////////////////////////////////////////
    // Make a surface to draw into
    ///////////////////////////////////////////////////////////////////////////
 
    SkImageInfo imageInfo = SkImageInfo::Make(DEV_W, DEV_H, kRGBA_8888_SkColorType,
                                              kPremul_SkAlphaType);
    sk_sp<SkSurface> surface = SkSurfaces::RenderTarget(context, skgpu::Budgeted::kNo, imageInfo);
    REPORTER_ASSERT(reporter, surface);
 
    ///////////////////////////////////////////////////////////////////////////
    // Draw the AHardwareBuffer SkImage into surface
    ///////////////////////////////////////////////////////////////////////////
 
    surface->getCanvas()->drawImage(image, 0, 0);
 
    SkBitmap readbackBitmap;
    readbackBitmap.allocN32Pixels(DEV_W, DEV_H);
 
    REPORTER_ASSERT(reporter, surface->readPixels(readbackBitmap, 0, 0));
    REPORTER_ASSERT(reporter, check_read(reporter, srcBitmap, readbackBitmap));
 
    // Draw the image a second time to make sure we get the correct origin when we get the cached
    // proxy from the generator.
    surface->getCanvas()->drawImage(image, 0, 0);
    REPORTER_ASSERT(reporter, surface->readPixels(readbackBitmap, 0, 0));
    REPORTER_ASSERT(reporter, check_read(reporter, srcBitmap, readbackBitmap));
 
    image.reset();
 
    cleanup_resources(buffer);
}
 
// Basic test to make sure we can import an AHardwareBuffer into an SkImage and draw it into a
// surface.
DEF_GANESH_TEST_FOR_RENDERING_CONTEXTS(GrAHardwareBuffer_BasicDrawTest,
                                       reporter,
                                       context_info,
                                       CtsEnforcement::kApiLevel_T) {
    basic_draw_test_helper(reporter, context_info, kTopLeft_GrSurfaceOrigin);
    basic_draw_test_helper(reporter, context_info, kBottomLeft_GrSurfaceOrigin);
}
 
static void surface_draw_test_helper(skiatest::Reporter* reporter,
                                     const sk_gpu_test::ContextInfo& info,
                                     GrSurfaceOrigin surfaceOrigin) {
 
    auto context = info.directContext();
    if (!context->priv().caps()->supportsAHardwareBufferImages()) {
        return;
    }
 
    bool isProtected = context->priv().caps()->supportsProtectedContent();
 
    ///////////////////////////////////////////////////////////////////////////
    // Setup SkBitmaps
    ///////////////////////////////////////////////////////////////////////////
 
    const SkBitmap srcBitmap = make_src_bitmap();
 
    ///////////////////////////////////////////////////////////////////////////
    // Setup AHardwareBuffer
    ///////////////////////////////////////////////////////////////////////////
 
    AHardwareBuffer* buffer = nullptr;
 
    AHardwareBuffer_Desc hwbDesc;
    hwbDesc.width = DEV_W;
    hwbDesc.height = DEV_H;
    hwbDesc.layers = 1;
    hwbDesc.usage = AHARDWAREBUFFER_USAGE_CPU_READ_NEVER |
                    AHARDWAREBUFFER_USAGE_CPU_WRITE_NEVER |
                    AHARDWAREBUFFER_USAGE_GPU_SAMPLED_IMAGE |
                    AHARDWAREBUFFER_USAGE_GPU_COLOR_OUTPUT |
                    (isProtected ? AHARDWAREBUFFER_USAGE_PROTECTED_CONTENT : 0);
 
    hwbDesc.format = AHARDWAREBUFFER_FORMAT_R8G8B8A8_UNORM;
    // The following three are not used in the allocate
    hwbDesc.stride = 0;
    hwbDesc.rfu0= 0;
    hwbDesc.rfu1= 0;
 
    if (int error = AHardwareBuffer_allocate(&hwbDesc, &buffer)) {
        ERRORF(reporter, "Failed to allocated hardware buffer, error: %d", error);
        cleanup_resources(buffer);
        return;
    }
 
    sk_sp<SkSurface> surface =
            SkSurfaces::WrapAndroidHardwareBuffer(context, buffer, surfaceOrigin, nullptr, nullptr);
    if (!surface) {
        ERRORF(reporter, "Failed to make SkSurface.");
        cleanup_resources(buffer);
        return;
    }
 
    surface->getCanvas()->drawImage(srcBitmap.asImage(), 0, 0);
 
    if (!isProtected) {
        // In Protected mode we can't readback so we just test that we can wrap the AHB and
        // draw it w/o errors
        SkBitmap readbackBitmap;
        readbackBitmap.allocN32Pixels(DEV_W, DEV_H);
 
        REPORTER_ASSERT(reporter, surface->readPixels(readbackBitmap, 0, 0));
        REPORTER_ASSERT(reporter, check_read(reporter, srcBitmap, readbackBitmap));
    }
 
    cleanup_resources(buffer);
}
 
// Test to make sure we can import an AHardwareBuffer into an SkSurface and draw into it.
DEF_GANESH_TEST_FOR_RENDERING_CONTEXTS(GrAHardwareBuffer_ImportAsSurface,
                                       reporter,
                                       context_info,
                                       CtsEnforcement::kApiLevel_T) {
    surface_draw_test_helper(reporter, context_info, kTopLeft_GrSurfaceOrigin);
    surface_draw_test_helper(reporter, context_info, kBottomLeft_GrSurfaceOrigin);
}
 
#endif