scissor_test.hpp

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#pragma once
#ifndef OGLPLUS_CONTEXT_SCISSOR_TEST_1201040722_HPP
#define OGLPLUS_CONTEXT_SCISSOR_TEST_1201040722_HPP

#include <oglplus/glfunc.hpp>

namespace oglplus {
namespace context {

struct ScissorRectangle
{
    // private implementation detail, do not use
    GLint _v[4];

    GLint X(void) const
    {
        return _v[0];
    }

    GLint Y(void) const
    {
        return _v[1];
    }

    GLint Left(void) const
    {
        return _v[0];
    }

    GLint Bottom(void) const
    {
        return _v[1];
    }

    GLint Width(void) const
    {
        return _v[2];
    }

    GLint Height(void) const
    {
        return _v[3];
    }
};


class ScissorTest
{
public:

    static void Scissor(
        GLint left,
        GLint bottom,
        GLsizei width,
        GLsizei height
    )
    {
        OGLPLUS_GLFUNC(Scissor)(left, bottom, width, height);
        OGLPLUS_VERIFY_SIMPLE(Scissor);
    }

#if OGLPLUS_DOCUMENTATION_ONLY || GL_VERSION_4_1 || GL_ARB_viewport_array

    static void Scissor(
        GLuint viewport,
        GLint left,
        GLint bottom,
        GLsizei width,
        GLsizei height
    )
    {
        OGLPLUS_GLFUNC(ScissorIndexed)(
            viewport,
            left,
            bottom,
            width,
            height
        );
        OGLPLUS_CHECK(
            ScissorIndexed,
            Error,
            Index(viewport)
        );
    }


    static void Scissor(GLuint viewport, GLint* v)
    {
        OGLPLUS_GLFUNC(ScissorIndexedv)(viewport, v);
        OGLPLUS_CHECK(
            ScissorIndexedv,
            Error,
            Index(viewport)
        );
    }


    static void ScissorArray(GLuint first, GLsizei count, GLint* v)
    {
        OGLPLUS_GLFUNC(ScissorArrayv)(first, count, v);
        OGLPLUS_CHECK_SIMPLE(ScissorArrayv);
    }


    static ScissorRectangle ScissorBox(GLuint viewport)
    {
        ScissorRectangle result;
        OGLPLUS_GLFUNC(GetIntegeri_v)(
            GL_SCISSOR_BOX,
            viewport,
            result._v
        );
        OGLPLUS_CHECK(
            GetIntegeri_v,
            Error,
            Index(viewport)
        );
        return result;
    }
#endif
};

} // namespace context
} // namespace oglplus

#endif // include guard