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

static int test_renderbuffer_object_info( cl_context context, cl_command_queue queue,
                                          GLsizei width, GLsizei height, GLenum attachment,
                                          GLenum format, GLenum internalFormat,
                                          GLenum glType, ExplicitType type, MTdata d )
{
    int error;

    if( type == kHalf )
        if( DetectFloatToHalfRoundingMode(queue) )
            return 1;

    // Create the GL render buffer
    glFramebufferWrapper glFramebuffer;
    glRenderbufferWrapper glRenderbuffer;
    BufferOwningPtr<char> inputBuffer(CreateGLRenderbuffer( width, height, attachment, format, internalFormat, glType, type, &glFramebuffer, &glRenderbuffer, &error, d, true ));
    if( error != 0 )
        return error;

    clMemWrapper image = (*clCreateFromGLRenderbuffer_ptr)(context, CL_MEM_READ_ONLY, glRenderbuffer, &error);
    test_error(error, "clCreateFromGLRenderbuffer failed");

    log_info( "- Given a GL format of %s, input type was %s, size was %d x %d\n",
              GetGLFormatName( internalFormat ),
              get_explicit_type_name( type ), (int)width, (int)height );

    // Verify the expected information here.
    return CheckGLObjectInfo(image, CL_GL_OBJECT_RENDERBUFFER, (GLuint)glRenderbuffer, internalFormat, 0);
}

int test_renderbuffer_getinfo( cl_device_id device, cl_context context, cl_command_queue queue, int numElements )
{
    GLenum attachments[] = { GL_COLOR_ATTACHMENT0_EXT };

    struct {
        GLenum internal;
        GLenum format;
        GLenum datatype;
        ExplicitType type;

    } formats[] = {
        { GL_RGBA,         GL_RGBA,             GL_UNSIGNED_BYTE,             kUChar },
        { GL_RGBA8,        GL_RGBA,             GL_UNSIGNED_BYTE,            kUChar },
        { GL_RGBA16,       GL_RGBA,             GL_UNSIGNED_SHORT,           kUShort },
        { GL_RGBA32F_ARB,  GL_RGBA,             GL_FLOAT,                    kFloat },
        { GL_RGBA16F_ARB,  GL_RGBA,             GL_HALF_FLOAT,               kHalf }
    };

    size_t fmtIdx, tgtIdx;
    int error = 0;
    size_t iter = 6;
    RandomSeed seed(gRandomSeed);

  // Check if images are supported
  if (checkForImageSupport(device)) {
    log_info("Device does not support images. Skipping test.\n");
    return 0;
  }

    if( !gluCheckExtension( (const GLubyte *)"GL_EXT_framebuffer_object", glGetString( GL_EXTENSIONS ) ) )
    {
        log_info( "Renderbuffers are not supported by this OpenGL implementation; skipping test\n" );
        return 0;
    }

    // Loop through a set of GL formats, testing a set of sizes against each one
    for( fmtIdx = 0; fmtIdx < sizeof( formats ) / sizeof( formats[ 0 ] ); fmtIdx++ )
    {
        for( tgtIdx = 0; tgtIdx < sizeof( attachments ) / sizeof( attachments[ 0 ] ); tgtIdx++ )
        {
            log_info( "Testing Renderbuffer object info for %s : %s : %s\n",
                GetGLFormatName( formats[ fmtIdx ].internal ),
                GetGLBaseFormatName( formats[ fmtIdx ].format ),
                GetGLTypeName( formats[ fmtIdx ].datatype ) );

            size_t i;
            for( i = 0; i < iter; i++ )
            {
                GLsizei width = random_in_range( 16, 512, seed );
                GLsizei height = random_in_range( 16, 512, seed );

                if( test_renderbuffer_object_info( context, queue, (int)width, (int)height,
                                                   attachments[ tgtIdx ],
                                                   formats[ fmtIdx ].format,
                                                   formats[ fmtIdx ].internal,
                                                   formats[ fmtIdx ].datatype,
                                                   formats[ fmtIdx ].type, seed ) )
                {
                    log_error( "ERROR: Renderbuffer write test failed for GL format %s : %s\n\n",
                        GetGLFormatName( formats[ fmtIdx ].internal ),
                        GetGLTypeName( formats[ fmtIdx ].datatype ) );

                    error++;
                    break;    // Skip other sizes for this combination
                }
            }
            if( i == iter )
            {
                log_info( "passed: Renderbuffer write test passed for GL format %s : %s\n\n",
                    GetGLFormatName( formats[ fmtIdx ].internal ),
                    GetGLTypeName( formats[ fmtIdx ].datatype ) );

            }
        }
    }

    return error;
}