/*

 * Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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 General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

#include "splashscreen_impl.h"

#include "splashscreen_gfx_impl.h"

int splashIsVisible = 0;

Splash *

SplashGetInstance()

{

    static Splash splash;

    static int preInitialized = 0;

    if (!preInitialized) {

        memset(&splash, 0, sizeof(Splash));

        splash.currentFrame = -1;

        preInitialized = 1;

    }

    return &splash;

}

SPLASHEXPORT void

SplashSetFileJarName(const char* fileName, const char* jarName) {

    Splash *splash = SplashGetInstance();

    free(splash->fileName);

    splash->fileName = SplashConvertStringAlloc(fileName, &splash->fileNameLen);

    free(splash->jarName);

    splash->jarName = SplashConvertStringAlloc(jarName, &splash->jarNameLen);

}

SPLASHEXPORT void

SplashInit()

{

    Splash *splash = SplashGetInstance();

    memset(splash, 0, sizeof(Splash));

    splash->currentFrame = -1;

    splash->scaleFactor = 1;

    initFormat(&splash->imageFormat, QUAD_RED_MASK, QUAD_GREEN_MASK,

        QUAD_BLUE_MASK, QUAD_ALPHA_MASK);

    SplashInitPlatform(splash);

}

SPLASHEXPORT void

SplashClose()

{

    Splash *splash = SplashGetInstance();

    if (splash->isVisible > 0) {

        SplashLock(splash);

        splash->isVisible = -1;

        SplashClosePlatform(splash);

        SplashUnlock(splash);

    }

}

void

SplashCleanup(Splash * splash)

{

    int i;

    splash->currentFrame = -1;

    SplashCleanupPlatform(splash);

    if (splash->frames) {

        for (i = 0; i < splash->frameCount; i++) {

            if (splash->frames[i].bitmapBits) {

                free(splash->frames[i].bitmapBits);

                splash->frames[i].bitmapBits = NULL;

            }

        }

        free(splash->frames);

        splash->frames = NULL;

    }

    if (splash->overlayData) {

        free(splash->overlayData);

        splash->overlayData = NULL;

    }

    SplashSetFileJarName(NULL, NULL);

}

SPLASHEXPORT void

SplashSetScaleFactor(float scaleFactor)

{

    Splash *splash = SplashGetInstance();

    splash->scaleFactor = scaleFactor;

}

void

SplashDone(Splash * splash)

{

    SplashCleanup(splash);

    SplashDonePlatform(splash);

}

int

SplashIsStillLooping(Splash * splash)

{

    if (splash->currentFrame < 0) {

        return 0;

    }

    return splash->loopCount != 1 ||

        splash->currentFrame + 1 < splash->frameCount;

}

void

SplashUpdateScreenData(Splash * splash)

{

    ImageRect srcRect, dstRect;

    if (splash->currentFrame < 0) {

        return;

    }

    initRect(&srcRect, 0, 0, splash->width, splash->height, 1,

        splash->width * sizeof(rgbquad_t),

        splash->frames[splash->currentFrame].bitmapBits, &splash->imageFormat);

    if (splash->screenData) {

        free(splash->screenData);

    }

    splash->screenStride = splash->width * splash->screenFormat.depthBytes;

    if (splash->byteAlignment > 1) {

        splash->screenStride =

            (splash->screenStride + splash->byteAlignment - 1) &

            ~(splash->byteAlignment - 1);

    }

    splash->screenData = malloc(splash->height * splash->screenStride);

    initRect(&dstRect, 0, 0, splash->width, splash->height, 1,

        splash->screenStride, splash->screenData, &splash->screenFormat);

    if (splash->overlayData) {

        convertRect2(&srcRect, &dstRect, CVT_BLEND, &splash->overlayRect);

    }

    else {

        convertRect(&srcRect, &dstRect, CVT_COPY);

    }

}

void

SplashNextFrame(Splash * splash)

{

    if (splash->currentFrame < 0) {

        return;

    }

    do {

        if (!SplashIsStillLooping(splash)) {

            return;

        }

        splash->time += splash->frames[splash->currentFrame].delay;

        if (++splash->currentFrame >= splash->frameCount) {

            splash->currentFrame = 0;

            if (splash->loopCount > 0) {

                splash->loopCount--;

            }

        }

    } while (splash->time + splash->frames[splash->currentFrame].delay -

        SplashTime() <= 0);

}

int

BitmapToYXBandedRectangles(ImageRect * pSrcRect, RECT_T * out)

{

    RECT_T *pPrevLine = NULL, *pFirst = out, *pThis = pFirst;

    int i, j, i0;

    int length;

    for (j = 0; j < pSrcRect->numLines; j++) {

        /* generate data for a scanline */

        byte_t *pSrc = (byte_t *) pSrcRect->pBits + j * pSrcRect->stride;

        RECT_T *pLine = pThis;

        i = 0;

        do {

            while (i < pSrcRect->numSamples &&

                   getRGBA(pSrc, pSrcRect->format) < ALPHA_THRESHOLD) {

                pSrc += pSrcRect->depthBytes;

                ++i;

            }

            if (i >= pSrcRect->numSamples) {

                break;

            }

            i0 = i;

            while (i < pSrcRect->numSamples &&

                   getRGBA(pSrc, pSrcRect->format) >= ALPHA_THRESHOLD) {

                pSrc += pSrcRect->depthBytes;

                ++i;

            }

            RECT_SET(*pThis, i0, j, i - i0, 1);

            ++pThis;

        } while (i < pSrcRect->numSamples);

        /*  check if the previous scanline is exactly the same, merge if so

           (this is the only optimization we can use for YXBanded rectangles, and win32 supports

           YXBanded only */

        length = pThis - pLine;

        if (pPrevLine && pLine - pPrevLine == length) {

            for (i = 0; i < length && RECT_EQ_X(pPrevLine[i], pLine[i]); ++i) {

            }

            if (i == pLine - pPrevLine) {

                // do merge

                for (i = 0; i < length; i++) {

                    RECT_INC_HEIGHT(pPrevLine[i]);

                }

                pThis = pLine;

                continue;

            }

        }

        /* or else use the generated scanline */

        pPrevLine = pLine;

    }

    return pThis - pFirst;

}

typedef struct FILEFORMAT

{

    int sign;

    int (*decodeStream) (Splash * splash, SplashStream * stream);

} FILEFORMAT;

static const FILEFORMAT formats[] = {

    {0x47, SplashDecodeGifStream},

    {0x89, SplashDecodePngStream},

    {0xFF, SplashDecodeJpegStream}

};

static int

SplashLoadStream(SplashStream * stream)

{

    int success = 0;

    int c;

    size_t i;

    Splash *splash = SplashGetInstance();

    if (splash->isVisible < 0) {

        return 0;

    }

    SplashLock(splash);

    /* the formats we support can be easily distinguished by the first byte */

    c = stream->peek(stream);

    if (c != -1) {

        for (i = 0; i < sizeof(formats) / sizeof(FILEFORMAT); i++) {

            if (c == formats[i].sign) {

                success = formats[i].decodeStream(splash, stream);

                break;

            }

        }

    }

    stream->close(stream);

    if (!success) {             // failed to decode

        if (splash->isVisible == 0) {

            SplashCleanup(splash);

        }

        SplashUnlock(splash);   // SplashClose locks

        if (splash->isVisible == 0) {

            SplashClose();

        }

    }

    else {

        splash->currentFrame = 0;

        if (splash->isVisible == 0) {

            SplashStart(splash);

        } else {

            SplashReconfigure(splash);

            splash->time = SplashTime();

        }

        SplashUnlock(splash);

    }

    return success;

}

SPLASHEXPORT int

SplashLoadFile(const char *filename)

{

    SplashStream stream;

    return SplashStreamInitFile(&stream, filename) &&

                SplashLoadStream(&stream);

}

SPLASHEXPORT int

SplashLoadMemory(void *data, int size)

{

    SplashStream stream;

    return SplashStreamInitMemory(&stream, data, size) &&

                SplashLoadStream(&stream);

}

/* SplashStart MUST be called from under the lock */

void

SplashStart(Splash * splash)

{

    if (splash->isVisible == 0) {

        SplashCreateThread(splash);

        splash->isVisible = 1;

    }

}

/* SplashStream functions */

static int readFile(void* pStream, void* pData, int nBytes) {

    FILE* f = ((SplashStream*)pStream)->arg.stdio.f;

    return fread(pData, 1, nBytes, f);

}

static int peekFile(void* pStream) {

    FILE* f = ((SplashStream*)pStream)->arg.stdio.f;

    int c = fgetc(f);

    if (c != EOF) {

        ungetc(c, f);

        return c;

    } else {

        return -1;

    }

}

static void closeFile(void* pStream) {

    FILE* f = ((SplashStream*)pStream)->arg.stdio.f;

    fclose(f);

}

static int readMem(void* pStream, void* pData, int nBytes) {

    unsigned char* pSrc = (unsigned char*)(((SplashStream*)pStream)->arg.mem.pData);

    unsigned char* pSrcEnd = (unsigned char*)(((SplashStream*)pStream)->arg.mem.pDataEnd);

    if (nBytes > pSrcEnd - pSrc) {

        nBytes = pSrcEnd - pSrc;

    }

    if (nBytes>0) {

        memcpy(pData, pSrc, nBytes);

        pSrc += nBytes;

        ((SplashStream*)pStream)->arg.mem.pData = (void*)pSrc;

    }

    return nBytes;

}

static int peekMem(void* pStream) {

    unsigned char* pSrc = (unsigned char*)(((SplashStream*)pStream)->arg.mem.pData);

    unsigned char* pSrcEnd = (unsigned char*)(((SplashStream*)pStream)->arg.mem.pDataEnd);

    if (pSrc >= pSrcEnd) {

        return -1;

    } else {

        return (int)*pSrc;

    }

}

static void closeMem(void* pStream) {

}

int SplashStreamInitFile(SplashStream * pStream, const char* filename) {

    pStream->arg.stdio.f = fopen(filename, "rb");

    pStream->read = readFile;

    pStream->peek = peekFile;

    pStream->close = closeFile;

    return pStream->arg.stdio.f != 0;

}

int SplashStreamInitMemory(SplashStream * pStream, void* pData, int size) {

    pStream->arg.mem.pData = (unsigned char*)pData;

    pStream->arg.mem.pDataEnd = (unsigned char*)pData + size;

    pStream->read = readMem;

    pStream->peek = peekMem;

    pStream->close = closeMem;

    return 1;

}