/**
 * @file llfloaterimagepreview.cpp
 * @brief LLFloaterImagePreview class implementation
 *
 * $LicenseInfo:firstyear=2004&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#include "llviewerprecompiledheaders.h"

#include "llfloaterimagepreview.h"

#include "llimagebmp.h"
#include "llimagetga.h"
#include "llimagejpeg.h"
#include "llimagepng.h"

#include "llagent.h"
#include "llagentbenefits.h"
#include "llbutton.h"
#include "llcheckboxctrl.h"
#include "llcombobox.h"
#include "lldrawable.h"
#include "lldrawpoolavatar.h"
#include "llrender.h"
#include "llface.h"
#include "llfocusmgr.h"
#include "lltextbox.h"
#include "lltoolmgr.h"
#include "llui.h"
#include "llviewercamera.h"
#include "llviewerwindow.h"
#include "llviewerobjectlist.h"
#include "llvoavatar.h"
#include "pipeline.h"
#include "lluictrlfactory.h"
#include "llviewershadermgr.h"
#include "llviewertexturelist.h"
#include "llstring.h"

#include "llendianswizzle.h"

#include "llviewercontrol.h"
#include "lltrans.h"
#include "llimagedimensionsinfo.h"

const S32 PREVIEW_BORDER_WIDTH = 2;
const S32 PREVIEW_RESIZE_HANDLE_SIZE = S32(RESIZE_HANDLE_WIDTH * OO_SQRT2) + PREVIEW_BORDER_WIDTH;
const S32 PREVIEW_HPAD = PREVIEW_RESIZE_HANDLE_SIZE;
const S32 PREVIEW_VPAD = -24 + 35;  // yuk, hard coded
const S32 PREF_BUTTON_HEIGHT = 16 + 7 + 16 + 35;
const S32 PREVIEW_TEXTURE_HEIGHT = 320;

//-----------------------------------------------------------------------------
// LLFloaterImagePreview()
//-----------------------------------------------------------------------------
LLFloaterImagePreview::LLFloaterImagePreview(const std::string& filename) :
    LLFloaterNameDesc(filename),

    mAvatarPreview(NULL),
    mSculptedPreview(NULL),
    mLastMouseX(0),
    mLastMouseY(0),
    mImagep(NULL)
{
    loadImage(mFilenameAndPath);
}

//-----------------------------------------------------------------------------
// postBuild()
//-----------------------------------------------------------------------------
bool LLFloaterImagePreview::postBuild()
{
    if (!LLFloaterNameDesc::postBuild())
    {
        return false;
    }

    LLCtrlSelectionInterface* iface = childGetSelectionInterface("clothing_type_combo");
    if (iface)
    {
        iface->selectFirstItem();
    }
    childSetCommitCallback("clothing_type_combo", onPreviewTypeCommit, this);

    mPreviewRect.set(PREVIEW_HPAD,
        PREVIEW_TEXTURE_HEIGHT + PREVIEW_VPAD,
        getRect().getWidth() - PREVIEW_HPAD,
        PREVIEW_HPAD + PREF_BUTTON_HEIGHT + PREVIEW_HPAD);
    mPreviewImageRect.set(0.f, 1.f, 1.f, 0.f);

    getChildView("bad_image_text")->setVisible(false);

    if (mRawImagep.notNull() && gAgent.getRegion() != NULL)
    {
        mAvatarPreview = new LLImagePreviewAvatar(256, 256);
        mAvatarPreview->setPreviewTarget("mPelvis", "mUpperBodyMesh0", mRawImagep, 2.f, false);

        mSculptedPreview = new LLImagePreviewSculpted(256, 256);
        mSculptedPreview->setPreviewTarget(mRawImagep, 2.0f);

        if (mRawImagep->getWidth() * mRawImagep->getHeight() <= LL_IMAGE_REZ_LOSSLESS_CUTOFF * LL_IMAGE_REZ_LOSSLESS_CUTOFF)
        {
            // We want "lossless_check" to be unchecked when it is disabled, regardless of
            // LosslessJ2CUpload state, so only assign control when enabling checkbox
            LLCheckBoxCtrl* check_box = getChild<LLCheckBoxCtrl>("lossless_check");
            check_box->setEnabled(true);
            check_box->setControlVariable(gSavedSettings.getControl("LosslessJ2CUpload"));
        }
    }
    else
    {
        mAvatarPreview = NULL;
        mSculptedPreview = NULL;
        getChildView("bad_image_text")->setVisible(true);
        getChildView("clothing_type_combo")->setEnabled(false);
        getChildView("ok_btn")->setEnabled(false);

        if(!mImageLoadError.empty())
        {
            getChild<LLUICtrl>("bad_image_text")->setValue(mImageLoadError.c_str());
        }
    }

    getChild<LLUICtrl>("ok_btn")->setCommitCallback(boost::bind(&LLFloaterNameDesc::onBtnOK, this));

    return true;
}


//-----------------------------------------------------------------------------
// getExpectedUploadCost()
//-----------------------------------------------------------------------------
S32 LLFloaterImagePreview::getExpectedUploadCost() const
{
    return LLAgentBenefitsMgr::current().getTextureUploadCost(mRawImagep);
}

//-----------------------------------------------------------------------------
// LLFloaterImagePreview()
//-----------------------------------------------------------------------------
LLFloaterImagePreview::~LLFloaterImagePreview()
{
    clearAllPreviewTextures();

    mRawImagep = NULL;
    mImagep = NULL ;
}

//static
//-----------------------------------------------------------------------------
// onPreviewTypeCommit()
//-----------------------------------------------------------------------------
void    LLFloaterImagePreview::onPreviewTypeCommit(LLUICtrl* ctrl, void* userdata)
{
    LLFloaterImagePreview *fp =(LLFloaterImagePreview *)userdata;

    if (!fp->mAvatarPreview || !fp->mSculptedPreview)
    {
        return;
    }

    S32 which_mode = 0;

    LLCtrlSelectionInterface* iface = fp->childGetSelectionInterface("clothing_type_combo");
    if (iface)
    {
        which_mode = iface->getFirstSelectedIndex();
    }

    switch(which_mode)
    {
    case 0:
        break;
    case 1:
        fp->mAvatarPreview->setPreviewTarget("mSkull", "mHairMesh0", fp->mRawImagep, 0.4f, false);
        break;
    case 2:
        fp->mAvatarPreview->setPreviewTarget("mSkull", "mHeadMesh0", fp->mRawImagep, 0.4f, false);
        break;
    case 3:
        fp->mAvatarPreview->setPreviewTarget("mChest", "mUpperBodyMesh0", fp->mRawImagep, 1.0f, false);
        break;
    case 4:
        fp->mAvatarPreview->setPreviewTarget("mKneeLeft", "mLowerBodyMesh0", fp->mRawImagep, 1.2f, false);
        break;
    case 5:
        fp->mAvatarPreview->setPreviewTarget("mSkull", "mHeadMesh0", fp->mRawImagep, 0.4f, true);
        break;
    case 6:
        fp->mAvatarPreview->setPreviewTarget("mChest", "mUpperBodyMesh0", fp->mRawImagep, 1.2f, true);
        break;
    case 7:
        fp->mAvatarPreview->setPreviewTarget("mKneeLeft", "mLowerBodyMesh0", fp->mRawImagep, 1.2f, true);
        break;
    case 8:
        fp->mAvatarPreview->setPreviewTarget("mKneeLeft", "mSkirtMesh0", fp->mRawImagep, 1.3f, false);
        break;
    case 9:
        fp->mSculptedPreview->setPreviewTarget(fp->mRawImagep, 2.0f);
        break;
    default:
        break;
    }

    fp->mAvatarPreview->refresh();
    fp->mSculptedPreview->refresh();
}


//-----------------------------------------------------------------------------
// clearAllPreviewTextures()
//-----------------------------------------------------------------------------
void LLFloaterImagePreview::clearAllPreviewTextures()
{
    if (mAvatarPreview)
    {
        mAvatarPreview->clearPreviewTexture("mHairMesh0");
        mAvatarPreview->clearPreviewTexture("mUpperBodyMesh0");
        mAvatarPreview->clearPreviewTexture("mLowerBodyMesh0");
        mAvatarPreview->clearPreviewTexture("mHeadMesh0");
        mAvatarPreview->clearPreviewTexture("mUpperBodyMesh0");
        mAvatarPreview->clearPreviewTexture("mLowerBodyMesh0");
        mAvatarPreview->clearPreviewTexture("mSkirtMesh0");
    }
}

//-----------------------------------------------------------------------------
// draw()
//-----------------------------------------------------------------------------
void LLFloaterImagePreview::draw()
{
    LLFloater::draw();
    LLRect r = getRect();

    if (mRawImagep.notNull())
    {
        LLCtrlSelectionInterface* iface = childGetSelectionInterface("clothing_type_combo");
        U32 selected = 0;
        if (iface)
            selected = iface->getFirstSelectedIndex();

        if (selected <= 0)
        {
            gl_rect_2d_checkerboard(mPreviewRect);

            if(mImagep.notNull())
            {
                gGL.getTexUnit(0)->bindManual(LLTexUnit::TT_TEXTURE, mImagep->getTexName());
            }
            else
            {
                mImagep = LLViewerTextureManager::getLocalTexture(mRawImagep.get(), false) ;

                gGL.getTexUnit(0)->unbind(mImagep->getTarget()) ;
                gGL.getTexUnit(0)->bindManual(LLTexUnit::TT_TEXTURE, mImagep->getTexName());
                stop_glerror();

                gGL.getTexUnit(0)->setTextureFilteringOption(LLTexUnit::TFO_BILINEAR);

                gGL.getTexUnit(0)->setTextureAddressMode(LLTexUnit::TAM_CLAMP);
                if (mAvatarPreview)
                {
                    mAvatarPreview->setTexture(mImagep->getTexName());
                    mSculptedPreview->setTexture(mImagep->getTexName());
                }
            }

            gGL.color3f(1.f, 1.f, 1.f);
            gGL.begin(LLRender::TRIANGLES);
            {
                gGL.texCoord2f(mPreviewImageRect.mLeft, mPreviewImageRect.mTop);
                gGL.vertex2i(mPreviewRect.mLeft, mPreviewRect.mTop);
                gGL.texCoord2f(mPreviewImageRect.mLeft, mPreviewImageRect.mBottom);
                gGL.vertex2i(mPreviewRect.mLeft, mPreviewRect.mBottom);
                gGL.texCoord2f(mPreviewImageRect.mRight, mPreviewImageRect.mBottom);
                gGL.vertex2i(mPreviewRect.mRight, mPreviewRect.mBottom);

                gGL.texCoord2f(mPreviewImageRect.mLeft, mPreviewImageRect.mTop);
                gGL.vertex2i(mPreviewRect.mLeft, mPreviewRect.mTop);
                gGL.texCoord2f(mPreviewImageRect.mRight, mPreviewImageRect.mBottom);
                gGL.vertex2i(mPreviewRect.mRight, mPreviewRect.mBottom);
                gGL.texCoord2f(mPreviewImageRect.mRight, mPreviewImageRect.mTop);
                gGL.vertex2i(mPreviewRect.mRight, mPreviewRect.mTop);
            }
            gGL.end();

            gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);

            stop_glerror();
        }
        else
        {
            if ((mAvatarPreview) && (mSculptedPreview))
            {
                gGL.color3f(1.f, 1.f, 1.f);

                if (selected == 9)
                {
                    gGL.getTexUnit(0)->bind(mSculptedPreview);
                }
                else
                {
                    gGL.getTexUnit(0)->bind(mAvatarPreview);
                }

                gGL.begin(LLRender::TRIANGLES);
                {
                    gGL.texCoord2f(0.f, 1.f);
                    gGL.vertex2i(mPreviewRect.mLeft, mPreviewRect.mTop);
                    gGL.texCoord2f(0.f, 0.f);
                    gGL.vertex2i(mPreviewRect.mLeft, mPreviewRect.mBottom);
                    gGL.texCoord2f(1.f, 0.f);
                    gGL.vertex2i(mPreviewRect.mRight, mPreviewRect.mBottom);

                    gGL.texCoord2f(0.f, 1.f);
                    gGL.vertex2i(mPreviewRect.mLeft, mPreviewRect.mTop);
                    gGL.texCoord2f(1.f, 0.f);
                    gGL.vertex2i(mPreviewRect.mRight, mPreviewRect.mBottom);
                    gGL.texCoord2f(1.f, 1.f);
                    gGL.vertex2i(mPreviewRect.mRight, mPreviewRect.mTop);
                }
                gGL.end();

                gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);
            }
        }
    }
}


//-----------------------------------------------------------------------------
// loadImage()
//-----------------------------------------------------------------------------
bool LLFloaterImagePreview::loadImage(const std::string& src_filename)
{
    try
    {
    std::string exten = gDirUtilp->getExtension(src_filename);
    U32 codec = LLImageBase::getCodecFromExtension(exten);

    LLImageDimensionsInfo image_info;
    if (!image_info.load(src_filename,codec))
    {
        mImageLoadError = image_info.getLastError();
        return false;
    }

    S32 max_width = gSavedSettings.getS32("max_texture_dimension_X");
    S32 max_height = gSavedSettings.getS32("max_texture_dimension_Y");

    if ((image_info.getWidth() > max_width) || (image_info.getHeight() > max_height))
    {
        LLStringUtil::format_map_t args;
        args["WIDTH"] = llformat("%d", max_width);
        args["HEIGHT"] = llformat("%d", max_height);

        mImageLoadError = LLTrans::getString("texture_load_dimensions_error", args);
        return false;
    }

    // Load the image
    LLPointer<LLImageFormatted> image = LLImageFormatted::createFromType(codec);
    if (image.isNull())
    {
        return false;
    }
    if (!image->load(src_filename))
    {
        return false;
    }
    // Decompress or expand it in a raw image structure
    LLPointer<LLImageRaw> raw_image = new LLImageRaw;
    if (!image->decode(raw_image, 0.0f))
    {
        return false;
    }
    // Check the image constraints
    if ((image->getComponents() != 3) && (image->getComponents() != 4))
    {
        image->setLastError("Image files with less than 3 or more than 4 components are not supported.");
        return false;
    }

    raw_image->biasedScaleToPowerOfTwo(LLViewerFetchedTexture::MAX_IMAGE_SIZE_DEFAULT);
    mRawImagep = raw_image;
    }
    catch (...)
    {
        LOG_UNHANDLED_EXCEPTION("");
        return false;
    }

    return true;
}

//-----------------------------------------------------------------------------
// handleMouseDown()
//-----------------------------------------------------------------------------
bool LLFloaterImagePreview::handleMouseDown(S32 x, S32 y, MASK mask)
{
    if (mPreviewRect.pointInRect(x, y))
    {
        bringToFront( x, y );
        gFocusMgr.setMouseCapture(this);
        gViewerWindow->hideCursor();
        mLastMouseX = x;
        mLastMouseY = y;
        return true;
    }

    return LLFloater::handleMouseDown(x, y, mask);
}

//-----------------------------------------------------------------------------
// handleMouseUp()
//-----------------------------------------------------------------------------
bool LLFloaterImagePreview::handleMouseUp(S32 x, S32 y, MASK mask)
{
    gFocusMgr.setMouseCapture(nullptr);
    gViewerWindow->showCursor();
    return LLFloater::handleMouseUp(x, y, mask);
}

//-----------------------------------------------------------------------------
// handleHover()
//-----------------------------------------------------------------------------
bool LLFloaterImagePreview::handleHover(S32 x, S32 y, MASK mask)
{
    MASK local_mask = mask & ~MASK_ALT;

    if (mAvatarPreview && hasMouseCapture())
    {
        if (local_mask == MASK_PAN)
        {
            // pan here
            LLCtrlSelectionInterface* iface = childGetSelectionInterface("clothing_type_combo");
            if (iface && iface->getFirstSelectedIndex() <= 0)
            {
                mPreviewImageRect.translate((F32)(x - mLastMouseX) * -0.005f * mPreviewImageRect.getWidth(),
                    (F32)(y - mLastMouseY) * -0.005f * mPreviewImageRect.getHeight());
            }
            else
            {
                mAvatarPreview->pan((F32)(x - mLastMouseX) * -0.005f, (F32)(y - mLastMouseY) * -0.005f);
                mSculptedPreview->pan((F32)(x - mLastMouseX) * -0.005f, (F32)(y - mLastMouseY) * -0.005f);
            }
        }
        else if (local_mask == MASK_ORBIT)
        {
            F32 yaw_radians = (F32)(x - mLastMouseX) * -0.01f;
            F32 pitch_radians = (F32)(y - mLastMouseY) * 0.02f;

            mAvatarPreview->rotate(yaw_radians, pitch_radians);
            mSculptedPreview->rotate(yaw_radians, pitch_radians);
        }
        else
        {
            LLCtrlSelectionInterface* iface = childGetSelectionInterface("clothing_type_combo");
            if (iface && iface->getFirstSelectedIndex() <= 0)
            {
                F32 zoom_amt = (F32)(y - mLastMouseY) * -0.002f;
                mPreviewImageRect.stretch(zoom_amt);
            }
            else
            {
                F32 yaw_radians = (F32)(x - mLastMouseX) * -0.01f;
                F32 zoom_amt = (F32)(y - mLastMouseY) * 0.02f;

                mAvatarPreview->rotate(yaw_radians, 0.f);
                mAvatarPreview->zoom(zoom_amt);
                mSculptedPreview->rotate(yaw_radians, 0.f);
                mSculptedPreview->zoom(zoom_amt);
            }
        }

        LLCtrlSelectionInterface* iface = childGetSelectionInterface("clothing_type_combo");
        if (iface && iface->getFirstSelectedIndex() <= 0)
        {
            if (mPreviewImageRect.getWidth() > 1.f)
            {
                mPreviewImageRect.stretch((1.f - mPreviewImageRect.getWidth()) * 0.5f);
            }
            else if (mPreviewImageRect.getWidth() < 0.1f)
            {
                mPreviewImageRect.stretch((0.1f - mPreviewImageRect.getWidth()) * 0.5f);
            }

            if (mPreviewImageRect.getHeight() > 1.f)
            {
                mPreviewImageRect.stretch((1.f - mPreviewImageRect.getHeight()) * 0.5f);
            }
            else if (mPreviewImageRect.getHeight() < 0.1f)
            {
                mPreviewImageRect.stretch((0.1f - mPreviewImageRect.getHeight()) * 0.5f);
            }

            if (mPreviewImageRect.mLeft < 0.f)
            {
                mPreviewImageRect.translate(-mPreviewImageRect.mLeft, 0.f);
            }
            else if (mPreviewImageRect.mRight > 1.f)
            {
                mPreviewImageRect.translate(1.f - mPreviewImageRect.mRight, 0.f);
            }

            if (mPreviewImageRect.mBottom < 0.f)
            {
                mPreviewImageRect.translate(0.f, -mPreviewImageRect.mBottom);
            }
            else if (mPreviewImageRect.mTop > 1.f)
            {
                mPreviewImageRect.translate(0.f, 1.f - mPreviewImageRect.mTop);
            }
        }
        else
        {
            mAvatarPreview->refresh();
            mSculptedPreview->refresh();
        }

        LLUI::getInstance()->setMousePositionLocal(this, mLastMouseX, mLastMouseY);
    }

    if (!mPreviewRect.pointInRect(x, y) || !mAvatarPreview || !mSculptedPreview)
    {
        return LLFloater::handleHover(x, y, mask);
    }
    else if (local_mask == MASK_ORBIT)
    {
        gViewerWindow->setCursor(UI_CURSOR_TOOLCAMERA);
    }
    else if (local_mask == MASK_PAN)
    {
        gViewerWindow->setCursor(UI_CURSOR_TOOLPAN);
    }
    else
    {
        gViewerWindow->setCursor(UI_CURSOR_TOOLZOOMIN);
    }

    return true;
}

//-----------------------------------------------------------------------------
// handleScrollWheel()
//-----------------------------------------------------------------------------
bool LLFloaterImagePreview::handleScrollWheel(S32 x, S32 y, S32 clicks)
{
    if (mPreviewRect.pointInRect(x, y) && mAvatarPreview)
    {
        mAvatarPreview->zoom((F32)clicks * -0.2f);
        mAvatarPreview->refresh();

        mSculptedPreview->zoom((F32)clicks * -0.2f);
        mSculptedPreview->refresh();
    }

    return true;
}

//-----------------------------------------------------------------------------
// onMouseCaptureLost()
//-----------------------------------------------------------------------------
// static
void LLFloaterImagePreview::onMouseCaptureLostImagePreview(LLMouseHandler* handler)
{
    gViewerWindow->showCursor();
}


//-----------------------------------------------------------------------------
// LLImagePreviewAvatar
//-----------------------------------------------------------------------------
LLImagePreviewAvatar::LLImagePreviewAvatar(S32 width, S32 height) : LLViewerDynamicTexture(width, height, 3, ORDER_MIDDLE, false)
{
    mNeedsUpdate = true;
    mTargetJoint = NULL;
    mTargetMesh = NULL;
    mCameraDistance = 0.f;
    mCameraYaw = 0.f;
    mCameraPitch = 0.f;
    mCameraZoom = 1.f;

    mDummyAvatar = (LLVOAvatar*)gObjectList.createObjectViewer(LL_PCODE_LEGACY_AVATAR, gAgent.getRegion(), LLViewerObject::CO_FLAG_UI_AVATAR);
    mDummyAvatar->mSpecialRenderMode = 2;

    mTextureName = 0;
}


LLImagePreviewAvatar::~LLImagePreviewAvatar()
{
    mDummyAvatar->markDead();
}

//virtual
S8 LLImagePreviewAvatar::getType() const
{
    return LLViewerDynamicTexture::LL_IMAGE_PREVIEW_AVATAR ;
}

void LLImagePreviewAvatar::setPreviewTarget(const std::string& joint_name, const std::string& mesh_name, LLImageRaw* imagep, F32 distance, bool male)
{
    mTargetJoint = mDummyAvatar->mRoot->findJoint(joint_name);
    // clear out existing test mesh
    if (mTargetMesh)
    {
        mTargetMesh->setTestTexture(0);
    }

    if (male)
    {
        mDummyAvatar->setVisualParamWeight( "male", 1.f );
        mDummyAvatar->updateVisualParams();
        mDummyAvatar->updateGeometry(mDummyAvatar->mDrawable);
    }
    else
    {
        mDummyAvatar->setVisualParamWeight( "male", 0.f );
        mDummyAvatar->updateVisualParams();
        mDummyAvatar->updateGeometry(mDummyAvatar->mDrawable);
    }
    mDummyAvatar->mRoot->setVisible(false, true);

    mTargetMesh = dynamic_cast<LLViewerJointMesh*>(mDummyAvatar->mRoot->findJoint(mesh_name));
    mTargetMesh->setTestTexture(mTextureName);
    mTargetMesh->setVisible(true, false);
    mCameraDistance = distance;
    mCameraZoom = 1.f;
    mCameraPitch = 0.f;
    mCameraYaw = 0.f;
    mCameraOffset.clearVec();
}

//-----------------------------------------------------------------------------
// clearPreviewTexture()
//-----------------------------------------------------------------------------
void LLImagePreviewAvatar::clearPreviewTexture(const std::string& mesh_name)
{
    if (mDummyAvatar)
    {
        LLViewerJointMesh *mesh = dynamic_cast<LLViewerJointMesh*>(mDummyAvatar->mRoot->findJoint(mesh_name));
        // clear out existing test mesh
        if (mesh)
        {
            mesh->setTestTexture(0);
        }
    }
}

//-----------------------------------------------------------------------------
// update()
//-----------------------------------------------------------------------------
bool LLImagePreviewAvatar::render()
{
    mNeedsUpdate = false;
    LLVOAvatar* avatarp = mDummyAvatar;

    gGL.pushUIMatrix();
    gGL.loadUIIdentity();

    gGL.matrixMode(LLRender::MM_PROJECTION);
    gGL.pushMatrix();
    gGL.loadIdentity();
    gGL.ortho(0.0f, (F32)mFullWidth, 0.0f, (F32)mFullHeight, -1.0f, 1.0f);

    gGL.matrixMode(LLRender::MM_MODELVIEW);
    gGL.pushMatrix();
    gGL.loadIdentity();


    LLGLSUIDefault def;
    gGL.color4f(0.15f, 0.2f, 0.3f, 1.f);

    gUIProgram.bind();

    gl_rect_2d_simple( mFullWidth, mFullHeight );

    gGL.matrixMode(LLRender::MM_PROJECTION);
    gGL.popMatrix();

    gGL.matrixMode(LLRender::MM_MODELVIEW);
    gGL.popMatrix();

    gGL.flush();
    LLVector3 target_pos = mTargetJoint->getWorldPosition();

    LLQuaternion camera_rot = LLQuaternion(mCameraPitch, LLVector3::y_axis) *
        LLQuaternion(mCameraYaw, LLVector3::z_axis);

    LLQuaternion av_rot = avatarp->mPelvisp->getWorldRotation() * camera_rot;
    LLViewerCamera::getInstance()->setOriginAndLookAt(
        target_pos + ((LLVector3(mCameraDistance, 0.f, 0.f) + mCameraOffset) * av_rot),     // camera
        LLVector3::z_axis,                                                                  // up
        target_pos + (mCameraOffset  * av_rot) );                                           // point of interest

    stop_glerror();

    LLViewerCamera::getInstance()->setAspect((F32)mFullWidth / mFullHeight);
    LLViewerCamera::getInstance()->setView(LLViewerCamera::getInstance()->getDefaultFOV() / mCameraZoom);
    LLViewerCamera::getInstance()->setPerspective(false, mOrigin.mX, mOrigin.mY, mFullWidth, mFullHeight, false);

    LLVertexBuffer::unbind();
    avatarp->updateLOD();

    if (avatarp->mDrawable.notNull())
    {
        LLGLDepthTest gls_depth(GL_TRUE, GL_TRUE);
        // make sure alpha=0 shows avatar material color
        LLGLDisable no_blend(GL_BLEND);

        LLFace* face = avatarp->mDrawable->getFace(0);
        if (face)
        {
            LLDrawPoolAvatar *avatarPoolp = (LLDrawPoolAvatar *)face->getPool();
            gPipeline.enableLightsPreview();
            avatarPoolp->renderAvatars(avatarp);  // renders only one avatar
        }
    }

    gGL.popUIMatrix();
    gGL.color4f(1,1,1,1);
    return true;
}

//-----------------------------------------------------------------------------
// refresh()
//-----------------------------------------------------------------------------
void LLImagePreviewAvatar::refresh()
{
    mNeedsUpdate = true;
}

//-----------------------------------------------------------------------------
// rotate()
//-----------------------------------------------------------------------------
void LLImagePreviewAvatar::rotate(F32 yaw_radians, F32 pitch_radians)
{
    mCameraYaw = mCameraYaw + yaw_radians;

    mCameraPitch = llclamp(mCameraPitch + pitch_radians, F_PI_BY_TWO * -0.8f, F_PI_BY_TWO * 0.8f);
}

//-----------------------------------------------------------------------------
// zoom()
//-----------------------------------------------------------------------------
void LLImagePreviewAvatar::zoom(F32 zoom_amt)
{
    mCameraZoom = llclamp(mCameraZoom + zoom_amt, 1.f, 10.f);
}

void LLImagePreviewAvatar::pan(F32 right, F32 up)
{
    mCameraOffset.mV[VY] = llclamp(mCameraOffset.mV[VY] + right * mCameraDistance / mCameraZoom, -1.f, 1.f);
    mCameraOffset.mV[VZ] = llclamp(mCameraOffset.mV[VZ] + up * mCameraDistance / mCameraZoom, -1.f, 1.f);
}


//-----------------------------------------------------------------------------
// LLImagePreviewSculpted
//-----------------------------------------------------------------------------

LLImagePreviewSculpted::LLImagePreviewSculpted(S32 width, S32 height) : LLViewerDynamicTexture(width, height, 3, ORDER_MIDDLE, false)
{
    mNeedsUpdate = true;
    mCameraDistance = 0.f;
    mCameraYaw = 0.f;
    mCameraPitch = 0.f;
    mCameraZoom = 1.f;
    mTextureName = 0;

    LLVolumeParams volume_params;
    volume_params.setType(LL_PCODE_PROFILE_CIRCLE, LL_PCODE_PATH_CIRCLE);
    volume_params.setSculptID(LLUUID::null, LL_SCULPT_TYPE_SPHERE);

    F32 const HIGHEST_LOD = 4.0f;
    mVolume = new LLVolume(volume_params,  HIGHEST_LOD);
}


LLImagePreviewSculpted::~LLImagePreviewSculpted()
{
}

//virtual
S8 LLImagePreviewSculpted::getType() const
{
    return LLViewerDynamicTexture::LL_IMAGE_PREVIEW_SCULPTED ;
}

void LLImagePreviewSculpted::setPreviewTarget(LLImageRaw* imagep, F32 distance)
{
    mCameraDistance = distance;
    mCameraZoom = 1.f;
    mCameraPitch = 0.f;
    mCameraYaw = 0.f;
    mCameraOffset.clearVec();

    if (imagep)
    {
        LLImageDataSharedLock lock(imagep);
        mVolume->sculpt(imagep->getWidth(), imagep->getHeight(), imagep->getComponents(), imagep->getData(), 0, false);
    }

    const LLVolumeFace &vf = mVolume->getVolumeFace(0);
    U32 num_indices = vf.mNumIndices;
    U32 num_vertices = vf.mNumVertices;

    mVertexBuffer = new LLVertexBuffer(LLVertexBuffer::MAP_VERTEX | LLVertexBuffer::MAP_NORMAL | LLVertexBuffer::MAP_TEXCOORD0);
    if (!mVertexBuffer->allocateBuffer(num_vertices, num_indices))
    {
        LL_WARNS() << "Failed to allocate Vertex Buffer for image preview to"
            << num_vertices << " vertices and "
            << num_indices << " indices" << LL_ENDL;
        // We are likely to crash on getTexCoord0Strider()
    }

    LLStrider<LLVector3> vertex_strider;
    LLStrider<LLVector3> normal_strider;
    LLStrider<LLVector2> tc_strider;
    LLStrider<U16> index_strider;

    mVertexBuffer->getVertexStrider(vertex_strider);
    mVertexBuffer->getNormalStrider(normal_strider);
    mVertexBuffer->getTexCoord0Strider(tc_strider);
    mVertexBuffer->getIndexStrider(index_strider);

    // build vertices and normals
    LLStrider<LLVector3> pos;
    pos = (LLVector3*) vf.mPositions; pos.setStride(16);
    LLStrider<LLVector3> norm;
    norm = (LLVector3*) vf.mNormals; norm.setStride(16);
    LLStrider<LLVector2> tc;
    tc = (LLVector2*) vf.mTexCoords; tc.setStride(8);

    for (U32 i = 0; i < num_vertices; i++)
    {
        *(vertex_strider++) = *pos++;
        LLVector3 normal = *norm++;
        normal.normalize();
        *(normal_strider++) = normal;
        *(tc_strider++) = *tc++;
    }

    // build indices
    for (U32 i = 0; i < num_indices; i++)
    {
        *(index_strider++) = vf.mIndices[i];
    }

    mVertexBuffer->unmapBuffer();
}


//-----------------------------------------------------------------------------
// render()
//-----------------------------------------------------------------------------
bool LLImagePreviewSculpted::render()
{
    mNeedsUpdate = false;
    LLGLSUIDefault def;
    LLGLDisable no_blend(GL_BLEND);
    LLGLEnable cull(GL_CULL_FACE);
    LLGLDepthTest depth(GL_TRUE);

    gGL.matrixMode(LLRender::MM_PROJECTION);
    gGL.pushMatrix();
    gGL.loadIdentity();
    gGL.ortho(0.0f, (F32)mFullWidth, 0.0f, (F32)mFullHeight, -1.0f, 1.0f);

    gGL.matrixMode(LLRender::MM_MODELVIEW);
    gGL.pushMatrix();
    gGL.loadIdentity();

    gGL.color4f(0.15f, 0.2f, 0.3f, 1.f);

    gUIProgram.bind();

    gl_rect_2d_simple( mFullWidth, mFullHeight );

    gGL.matrixMode(LLRender::MM_PROJECTION);
    gGL.popMatrix();

    gGL.matrixMode(LLRender::MM_MODELVIEW);
    gGL.popMatrix();

    glClear(GL_DEPTH_BUFFER_BIT);

    LLVector3 target_pos(0, 0, 0);

    LLQuaternion camera_rot = LLQuaternion(mCameraPitch, LLVector3::y_axis) *
        LLQuaternion(mCameraYaw, LLVector3::z_axis);

    LLQuaternion av_rot = camera_rot;
    LLViewerCamera::getInstance()->setOriginAndLookAt(
        target_pos + ((LLVector3(mCameraDistance, 0.f, 0.f) + mCameraOffset) * av_rot),     // camera
        LLVector3::z_axis,                                                                  // up
        target_pos + (mCameraOffset  * av_rot) );                                           // point of interest

    stop_glerror();

    LLViewerCamera::getInstance()->setAspect((F32) mFullWidth / mFullHeight);
    LLViewerCamera::getInstance()->setView(LLViewerCamera::getInstance()->getDefaultFOV() / mCameraZoom);
    LLViewerCamera::getInstance()->setPerspective(false, mOrigin.mX, mOrigin.mY, mFullWidth, mFullHeight, false);

    const LLVolumeFace &vf = mVolume->getVolumeFace(0);
    U32 num_indices = vf.mNumIndices;

    gPipeline.enableLightsAvatar();

    gObjectPreviewProgram.bind();
    gPipeline.enableLightsPreview();

    gGL.pushMatrix();
    const F32 SCALE = 1.25f;
    gGL.scalef(SCALE, SCALE, SCALE);
    const F32 BRIGHTNESS = 0.9f;
    gGL.diffuseColor3f(BRIGHTNESS, BRIGHTNESS, BRIGHTNESS);

    mVertexBuffer->setBuffer();
    mVertexBuffer->draw(LLRender::TRIANGLES, num_indices, 0);

    gGL.popMatrix();

    gObjectPreviewProgram.unbind();

    return true;
}

//-----------------------------------------------------------------------------
// refresh()
//-----------------------------------------------------------------------------
void LLImagePreviewSculpted::refresh()
{
    mNeedsUpdate = true;
}

//-----------------------------------------------------------------------------
// rotate()
//-----------------------------------------------------------------------------
void LLImagePreviewSculpted::rotate(F32 yaw_radians, F32 pitch_radians)
{
    mCameraYaw = mCameraYaw + yaw_radians;

    mCameraPitch = llclamp(mCameraPitch + pitch_radians, F_PI_BY_TWO * -0.8f, F_PI_BY_TWO * 0.8f);
}

//-----------------------------------------------------------------------------
// zoom()
//-----------------------------------------------------------------------------
void LLImagePreviewSculpted::zoom(F32 zoom_amt)
{
    mCameraZoom = llclamp(mCameraZoom + zoom_amt, 1.f, 10.f);
}

void LLImagePreviewSculpted::pan(F32 right, F32 up)
{
    mCameraOffset.mV[VY] = llclamp(mCameraOffset.mV[VY] + right * mCameraDistance / mCameraZoom, -1.f, 1.f);
    mCameraOffset.mV[VZ] = llclamp(mCameraOffset.mV[VZ] + up * mCameraDistance / mCameraZoom, -1.f, 1.f);
}