//
// Copyright (c) 2017 The Khronos Group Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#include "common.h"
#include "testBase.h"

#if defined(__APPLE__)
#include <OpenGL/glu.h>
#else
#include <GL/glu.h>
#include <CL/cl_gl.h>
#endif

#include <algorithm>

using namespace std;

void calc_2D_multisample_size_descriptors(sizevec_t* sizes, size_t nsizes)
{
    // Need to limit texture size according to GL device properties
    GLint maxTextureSize = 4096;
    glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxTextureSize);

    RandomSeed seed(gRandomSeed);

    // Generate some random sizes (within reasonable ranges)
    for (size_t i = 0; i < nsizes; i++)
    {
        sizes[i].width =
            random_in_range(2, min(maxTextureSize, 1 << (i + 4)), seed);
        sizes[i].height =
            random_in_range(2, min(maxTextureSize, 1 << (i + 4)), seed);
        sizes[i].depth = 1;
    }
}

void calc_2D_array_multisample_size_descriptors(sizevec_t* sizes, size_t nsizes)
{
    // Need to limit array size according to GL device properties
    GLint maxTextureLayers = 16, maxTextureSize = 4096;
    glGetIntegerv(GL_MAX_ARRAY_TEXTURE_LAYERS, &maxTextureLayers);
    glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxTextureSize);

    RandomSeed seed(gRandomSeed);

    // Generate some random sizes (within reasonable ranges)
    for (size_t i = 0; i < nsizes; i++)
    {
        sizes[i].width =
            random_in_range(2, min(maxTextureSize, 1 << (i + 4)), seed);
        sizes[i].height =
            random_in_range(2, min(maxTextureSize, 1 << (i + 4)), seed);
        sizes[i].depth =
            random_in_range(2, min(maxTextureLayers, 1 << (i + 4)), seed);
    }
}

int test_images_read_2D_multisample(cl_device_id device, cl_context context,
                                    cl_command_queue queue, int numElements)
{
    if (!is_extension_available(device, "cl_khr_gl_msaa_sharing"))
    {
        log_info("Test not run because 'cl_khr_gl_msaa_sharing' extension is "
                 "not supported by the tested device\n");
        return 0;
    }

    glEnable(GL_MULTISAMPLE);

    const size_t nsizes = 8;
    sizevec_t sizes[nsizes];
    calc_2D_multisample_size_descriptors(sizes, nsizes);

    size_t nformats;

    GLenum targets[] = { GL_TEXTURE_2D_MULTISAMPLE };
    size_t ntargets = sizeof(targets) / sizeof(targets[0]);

    nformats = sizeof(common_formats) / sizeof(common_formats[0]);
    int ret_common =
        test_images_read_common(device, context, queue, common_formats,
                                nformats, targets, ntargets, sizes, nsizes);

    nformats = sizeof(depth_formats) / sizeof(depth_formats[0]);
    int ret_depth =
        test_images_read_common(device, context, queue, depth_formats, nformats,
                                targets, ntargets, sizes, nsizes);

    return (ret_common) ? ret_common : ret_depth;
}

int test_images_read_2Darray_multisample(cl_device_id device,
                                         cl_context context,
                                         cl_command_queue queue, int)
{
    if (!is_extension_available(device, "cl_khr_gl_msaa_sharing"))
    {
        log_info("Test not run because 'cl_khr_gl_msaa_sharing' extension is "
                 "not supported by the tested device\n");
        return 0;
    }

    glEnable(GL_MULTISAMPLE);

    const size_t nsizes = 4;
    sizevec_t sizes[nsizes];
    calc_2D_array_multisample_size_descriptors(sizes, nsizes);

    size_t nformats;

    GLenum targets[] = { GL_TEXTURE_2D_MULTISAMPLE_ARRAY };
    size_t ntargets = sizeof(targets) / sizeof(targets[0]);

    nformats = sizeof(common_formats) / sizeof(common_formats[0]);
    int ret_common =
        test_images_read_common(device, context, queue, common_formats,
                                nformats, targets, ntargets, sizes, nsizes);

    nformats = sizeof(depth_formats) / sizeof(depth_formats[0]);
    int ret_depth =
        test_images_read_common(device, context, queue, depth_formats, nformats,
                                targets, ntargets, sizes, nsizes);

    return (ret_common) ? ret_common : ret_depth;
}