/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "WebGL2Context.h"

#include "WebGLSampler.h"

#include "GLContext.h"

namespace mozilla {

already_AddRefed<WebGLSampler>

WebGL2Context::CreateSampler()

{

    const FuncScope funcScope(*this, "createSampler");

    if (IsContextLost())

        return nullptr;

    RefPtr<WebGLSampler> globj = new WebGLSampler(this);

    return globj.forget();

}

void

WebGL2Context::DeleteSampler(WebGLSampler* sampler)

{

    const FuncScope funcScope(*this, "deleteSampler");

    if (!ValidateDeleteObject(sampler))

        return;

    for (uint32_t n = 0; n < mGLMaxTextureUnits; n++) {

        if (mBoundSamplers[n] == sampler) {

            mBoundSamplers[n] = nullptr;

            InvalidateResolveCacheForTextureWithTexUnit(n);

        }

    }

    sampler->RequestDelete();

}

bool

WebGL2Context::IsSampler(const WebGLSampler* const obj)

{

    const FuncScope funcScope(*this, "isSampler");

    if (!ValidateIsObject(obj))

        return false;

    return gl->fIsSampler(obj->mGLName);

}

void

WebGL2Context::BindSampler(GLuint unit, WebGLSampler* sampler)

{

    const FuncScope funcScope(*this, "bindSampler");

    if (IsContextLost())

        return;

    if (sampler && !ValidateObject("sampler", *sampler))

        return;

    if (unit >= mGLMaxTextureUnits)

        return ErrorInvalidValue("unit must be < %u", mGLMaxTextureUnits);

    ////

    gl->fBindSampler(unit, sampler ? sampler->mGLName : 0);

    InvalidateResolveCacheForTextureWithTexUnit(unit);

    mBoundSamplers[unit] = sampler;

}

void

WebGL2Context::SamplerParameteri(WebGLSampler& sampler, GLenum pname, GLint param)

{

    const FuncScope funcScope(*this, "samplerParameteri");

    if (IsContextLost())

        return;

    if (!ValidateObject("sampler", sampler))

        return;

    sampler.SamplerParameter(pname, FloatOrInt(param));

}

void

WebGL2Context::SamplerParameterf(WebGLSampler& sampler, GLenum pname, GLfloat param)

{

    const FuncScope funcScope(*this, "samplerParameterf");

    if (IsContextLost())

        return;

    if (!ValidateObject("sampler", sampler))

        return;

    sampler.SamplerParameter(pname, FloatOrInt(param));

}

void

WebGL2Context::GetSamplerParameter(JSContext*, const WebGLSampler& sampler, GLenum pname,

                                   JS::MutableHandleValue retval)

{

    const FuncScope funcScope(*this, "getSamplerParameter");

    retval.setNull();

    if (IsContextLost())

        return;

    if (!ValidateObject("sampler", sampler))

        return;

    ////

    switch (pname) {

    case LOCAL_GL_TEXTURE_MIN_FILTER:

    case LOCAL_GL_TEXTURE_MAG_FILTER:

    case LOCAL_GL_TEXTURE_WRAP_S:

    case LOCAL_GL_TEXTURE_WRAP_T:

    case LOCAL_GL_TEXTURE_WRAP_R:

    case LOCAL_GL_TEXTURE_COMPARE_MODE:

    case LOCAL_GL_TEXTURE_COMPARE_FUNC:

        {

            GLint param = 0;

            gl->fGetSamplerParameteriv(sampler.mGLName, pname, &param);

            retval.set(JS::Int32Value(param));

        }

        return;

    case LOCAL_GL_TEXTURE_MIN_LOD:

    case LOCAL_GL_TEXTURE_MAX_LOD:

        {

            GLfloat param = 0;

            gl->fGetSamplerParameterfv(sampler.mGLName, pname, &param);

            retval.set(JS::Float32Value(param));

        }

        return;

    default:

        ErrorInvalidEnumInfo("pname", pname);

        return;

    }

}

} // namespace mozilla