//
// Copyright 2016 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//

// RobustClientMemoryTest.cpp : Tests of the GL_ANGLE_robust_client_memory extension.

#include "test_utils/ANGLETest.h"

#include "test_utils/gl_raii.h"

namespace angle
{

constexpr GLsizei kWindowSize = 128;

class RobustClientMemoryTest : public ANGLETest
{
  protected:
    RobustClientMemoryTest()
    {
        setWindowWidth(kWindowSize);
        setWindowHeight(kWindowSize);
        setConfigRedBits(8);
        setConfigGreenBits(8);
        setConfigBlueBits(8);
        setConfigAlphaBits(8);
    }

    bool extensionsPresent() const
    {
        if (!IsGLExtensionEnabled("GL_ANGLE_robust_client_memory"))
        {
            std::cout << "Test skipped because GL_ANGLE_robust_client_memory is not available.";
            return false;
        }

        return true;
    }
};

// Test basic usage and validation of glGetIntegervRobustANGLE
TEST_P(RobustClientMemoryTest, GetInteger)
{
    if (!extensionsPresent())
    {
        return;
    }

    // Verify that the robust and regular entry points return the same values
    GLint resultRobust;
    GLsizei length;
    glGetIntegervRobustANGLE(GL_MAX_VERTEX_ATTRIBS, 1, &length, &resultRobust);
    EXPECT_GL_NO_ERROR();
    EXPECT_EQ(1, length);

    GLint resultRegular;
    glGetIntegerv(GL_MAX_VERTEX_ATTRIBS, &resultRegular);
    EXPECT_GL_NO_ERROR();
    EXPECT_EQ(resultRegular, resultRobust);

    // Query a dynamic value
    GLint numCompressedFormats;
    glGetIntegervRobustANGLE(GL_NUM_COMPRESSED_TEXTURE_FORMATS, 1, &length, &numCompressedFormats);
    ASSERT_GL_NO_ERROR();
    EXPECT_EQ(1, length);

    if (numCompressedFormats > 0)
    {
        std::vector<GLint> resultBuf(numCompressedFormats * 2, 0);

        // Test when the bufSize is too low
        glGetIntegervRobustANGLE(GL_COMPRESSED_TEXTURE_FORMATS, numCompressedFormats - 1, &length,
                                 resultBuf.data());
        EXPECT_GL_ERROR(GL_INVALID_OPERATION);
        EXPECT_TRUE(std::all_of(resultBuf.begin(), resultBuf.end(),
                                [](GLint value) { return value == 0; }));

        // Make sure the GL doesn't touch the end of the buffer
        glGetIntegervRobustANGLE(GL_COMPRESSED_TEXTURE_FORMATS,
                                 static_cast<GLsizei>(resultBuf.size()), &length, resultBuf.data());
        EXPECT_GL_NO_ERROR();
        EXPECT_EQ(numCompressedFormats, length);
        EXPECT_TRUE(std::none_of(resultBuf.begin(), resultBuf.begin() + length,
                                 [](GLint value) { return value == 0; }));
        EXPECT_TRUE(std::all_of(resultBuf.begin() + length, resultBuf.end(),
                                [](GLint value) { return value == 0; }));
    }

    // Test with null length
    glGetIntegervRobustANGLE(GL_MAX_VARYING_VECTORS, 1, nullptr, &resultRobust);
    EXPECT_GL_NO_ERROR();

    glGetIntegervRobustANGLE(GL_MAX_VIEWPORT_DIMS, 1, nullptr, &resultRobust);
    EXPECT_GL_ERROR(GL_INVALID_OPERATION);

    GLint maxViewportDims[2];
    glGetIntegervRobustANGLE(GL_MAX_VIEWPORT_DIMS, 2, nullptr, maxViewportDims);
    EXPECT_GL_NO_ERROR();
}

// Test basic usage and validation of glTexImage2DRobustANGLE and glTexSubImage2DRobustANGLE
TEST_P(RobustClientMemoryTest, TexImage2D)
{
    if (!extensionsPresent())
    {
        return;
    }
    GLTexture tex;
    glBindTexture(GL_TEXTURE_2D, tex.get());

    GLsizei dataDimension = 1024;
    std::vector<GLubyte> rgbaData(dataDimension * dataDimension * 4);

    // Test the regular case
    glTexImage2DRobustANGLE(GL_TEXTURE_2D, 0, GL_RGBA, dataDimension, dataDimension, 0, GL_RGBA,
                            GL_UNSIGNED_BYTE, static_cast<GLsizei>(rgbaData.size()),
                            rgbaData.data());
    EXPECT_GL_NO_ERROR();

    glTexSubImage2DRobustANGLE(GL_TEXTURE_2D, 0, 0, 0, dataDimension, dataDimension, GL_RGBA,
                               GL_UNSIGNED_BYTE, static_cast<GLsizei>(rgbaData.size()),
                               rgbaData.data());
    EXPECT_GL_NO_ERROR();

    // Test with a data size that is too small
    glTexImage2DRobustANGLE(GL_TEXTURE_2D, 0, GL_RGBA, dataDimension, dataDimension, 0, GL_RGBA,
                            GL_UNSIGNED_BYTE, static_cast<GLsizei>(rgbaData.size()) / 2,
                            rgbaData.data());
    EXPECT_GL_ERROR(GL_INVALID_OPERATION);

    glTexSubImage2DRobustANGLE(GL_TEXTURE_2D, 0, 0, 0, dataDimension, dataDimension, GL_RGBA,
                               GL_UNSIGNED_BYTE, static_cast<GLsizei>(rgbaData.size()) / 2,
                               rgbaData.data());
    EXPECT_GL_ERROR(GL_INVALID_OPERATION);

    if (getClientMajorVersion() >= 3)
    {
        // Set an unpack parameter that would cause the driver to read past the end of the buffer
        glPixelStorei(GL_UNPACK_ROW_LENGTH, dataDimension + 1);
        glTexImage2DRobustANGLE(GL_TEXTURE_2D, 0, GL_RGBA, dataDimension, dataDimension, 0, GL_RGBA,
                                GL_UNSIGNED_BYTE, static_cast<GLsizei>(rgbaData.size()),
                                rgbaData.data());
        EXPECT_GL_ERROR(GL_INVALID_OPERATION);
    }
}

// Test basic usage and validation of glReadPixelsRobustANGLE
TEST_P(RobustClientMemoryTest, ReadPixels)
{
    if (!extensionsPresent())
    {
        return;
    }

    // TODO(ynovikov): Looks like a driver bug on Intel HD 530 http://anglebug.com/1877
    ANGLE_SKIP_TEST_IF(IsLinux() && IsIntel() && IsDesktopOpenGL());

    GLsizei dataDimension = 16;
    std::vector<GLubyte> rgbaData(dataDimension * dataDimension * 4);

    // Test the regular case
    GLsizei length = 0;
    GLsizei width  = 0;
    GLsizei height = 0;
    glReadPixelsRobustANGLE(0, 0, dataDimension, dataDimension, GL_RGBA, GL_UNSIGNED_BYTE,
                            static_cast<GLsizei>(rgbaData.size()), &length, &width, &height,
                            rgbaData.data());
    EXPECT_GL_NO_ERROR();
    EXPECT_EQ(static_cast<GLsizei>(rgbaData.size()), length);
    EXPECT_EQ(dataDimension, width);
    EXPECT_EQ(dataDimension, height);

    // Test a case that would be partially clipped
    glReadPixelsRobustANGLE(-1, kWindowSize - dataDimension + 3, dataDimension, dataDimension,
                            GL_RGBA, GL_UNSIGNED_BYTE, static_cast<GLsizei>(rgbaData.size()),
                            &length, &width, &height, rgbaData.data());
    EXPECT_GL_NO_ERROR();
    EXPECT_EQ(static_cast<GLsizei>(rgbaData.size()), length);
    EXPECT_EQ(dataDimension - 1, width);
    EXPECT_EQ(dataDimension - 3, height);

    // Test with a data size that is too small
    glReadPixelsRobustANGLE(0, 0, dataDimension, dataDimension, GL_RGBA, GL_UNSIGNED_BYTE,
                            static_cast<GLsizei>(rgbaData.size()) - 1, &length, nullptr, nullptr,
                            rgbaData.data());
    EXPECT_GL_ERROR(GL_INVALID_OPERATION);

    if (getClientMajorVersion() >= 3)
    {
        // Set a pack parameter that would cause the driver to write past the end of the buffer
        glPixelStorei(GL_PACK_ROW_LENGTH, dataDimension + 1);
        glReadPixelsRobustANGLE(0, 0, dataDimension, dataDimension, GL_RGBA, GL_UNSIGNED_BYTE,
                                static_cast<GLsizei>(rgbaData.size()), &length, nullptr, nullptr,
                                rgbaData.data());
        EXPECT_GL_ERROR(GL_INVALID_OPERATION);
    }
}

// Use this to select which configurations (e.g. which renderer, which GLES major version) these
// tests should be run against.
ANGLE_INSTANTIATE_TEST_ES2_AND_ES3(RobustClientMemoryTest);

}  // namespace angle