//
// 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 "testBase.h"
#include "common.h"

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

#include <algorithm>

using namespace std;

#pragma mark -
#pragma mark _2D depth read tests

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

    size = min(maxTextureSize, maxTextureRectangleSize);

    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(size, 1 << (i + 4)), seed);
        sizes[i].height = random_in_range(2, min(size, 1 << (i + 4)), seed);
        sizes[i].depth = 1;
    }
}

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

    size = min(maxTextureSize, maxTextureRectangleSize);

    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(size, 1 << (i + 4)), seed);
        sizes[i].height = random_in_range(2, min(size, 1 << (i + 4)), seed);
        sizes[i].depth =
            random_in_range(2, min(maxTextureLayers, 1 << (i + 4)), seed);
    }
}

int test_images_read_2D_depth(cl_device_id device, cl_context context,
                              cl_command_queue queue, int numElements)
{
    if (!is_extension_available(device, "cl_khr_gl_depth_images"))
    {
        log_info("Test not run because 'cl_khr_gl_depth_images' extension is "
                 "not supported by the tested device\n");
        return 0;
    }

    RandomSeed seed(gRandomSeed);

    GLenum targets[] = { GL_TEXTURE_2D, GL_TEXTURE_RECTANGLE_EXT };
    size_t ntargets = sizeof(targets) / sizeof(targets[0]);

    size_t nformats = sizeof(depth_formats) / sizeof(depth_formats[0]);

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

    return test_images_read_common(device, context, queue, depth_formats,
                                   nformats, targets, ntargets, sizes, nsizes);
}

#pragma mark -
#pragma mark _2D depth write tests


int test_images_write_2D_depth(cl_device_id device, cl_context context,
                               cl_command_queue queue, int numElements)
{
    if (!is_extension_available(device, "cl_khr_gl_depth_images"))
    {
        log_info("Test not run because 'cl_khr_gl_depth_images' extension is "
                 "not supported by the tested device\n");
        return 0;
    }

    GLenum targets[] = { GL_TEXTURE_2D, GL_TEXTURE_RECTANGLE_EXT };
    size_t ntargets = sizeof(targets) / sizeof(targets[0]);
    size_t nformats = sizeof(depth_formats) / sizeof(depth_formats[0]);

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

    return test_images_write_common(device, context, queue, depth_formats,
                                    nformats, targets, ntargets, sizes, nsizes);
}

int test_images_read_2Darray_depth(cl_device_id device, cl_context context,
                                   cl_command_queue queue, int)
{
    if (!is_extension_available(device, "cl_khr_gl_depth_images"))
    {
        log_info("Test not run because 'cl_khr_gl_depth_images' extension is "
                 "not supported by the tested device\n");
        return 0;
    }

    size_t nformats = sizeof(depth_formats) / sizeof(depth_formats[0]);
    GLenum targets[] = { GL_TEXTURE_2D_ARRAY };
    size_t ntargets = sizeof(targets) / sizeof(targets[0]);

    const size_t nsizes = 6;
    sizevec_t sizes[nsizes];
    calc_depth_array_size_descriptors(sizes, nsizes);

    return test_images_read_common(device, context, queue, depth_formats,
                                   nformats, targets, ntargets, sizes, nsizes);
}

int test_images_write_2Darray_depth(cl_device_id device, cl_context context,
                                    cl_command_queue queue, int numElements)
{
    if (!is_extension_available(device, "cl_khr_gl_depth_images"))
    {
        log_info("Test not run because 'cl_khr_gl_depth_images' extension is "
                 "not supported by the tested device\n");
        return 0;
    }

    // FIXME: Query for 2D image array write support.

    GLenum targets[] = { GL_TEXTURE_2D_ARRAY };
    size_t ntargets = sizeof(targets) / sizeof(targets[0]);
    size_t nformats = sizeof(depth_formats) / sizeof(depth_formats[0]);

    const size_t nsizes = 6;
    sizevec_t sizes[nsizes];
    calc_depth_array_size_descriptors(sizes, nsizes);

    return test_images_write_common(device, context, queue, depth_formats,
                                    nformats, targets, ntargets, sizes, nsizes);
}