/*!
* \brief pixReadMemWebP()
*
* \param[in] filedata webp compressed data in memory
* \param[in] filesize number of bytes in data
* \return pix 32 bpp, or NULL on error
*
* <pre>
* Notes:
* (1) When the encoded data only has 3 channels (no alpha),
* WebPDecodeRGBAInto() generates a raster of 32-bit pixels, with
* the alpha channel set to opaque (255).
* (2) We don't need to use the gnu runtime functions like fmemopen()
* for redirecting data from a stream to memory, because
* the webp library has been written with memory-to-memory
* functions at the lowest level (which is good!). And, in
* any event, fmemopen() doesn't work with l_binaryReadStream().
* </pre>
*/
PIX *
pixReadMemWebP(const l_uint8 *filedata,
size_t filesize)
{
l_uint8 *out = NULL;
l_int32 w, h, has_alpha, wpl, stride;
l_uint32 *data;
size_t size;
PIX *pix;
WebPBitstreamFeatures features;
PROCNAME("pixReadMemWebP");
if (!filedata)
return (PIX *)ERROR_PTR("filedata not defined", procName, NULL);
if (WebPGetFeatures(filedata, filesize, &features))
return (PIX *)ERROR_PTR("Invalid WebP file", procName, NULL);
w = features.width;
h = features.height;
has_alpha = features.has_alpha;
/* Write from compressed Y,U,V arrays to pix raster data */
pix = pixCreate(w, h, 32);
pixSetInputFormat(pix, IFF_WEBP);
if (has_alpha) pixSetSpp(pix, 4);
data = pixGetData(pix);
wpl = pixGetWpl(pix);
stride = wpl * 4;
size = stride * h;
out = WebPDecodeRGBAInto(filedata, filesize, (uint8_t *)data, size,
stride);
if (out == NULL) { /* error: out should also point to data */
pixDestroy(&pix);
return (PIX *)ERROR_PTR("WebP decode failed", procName, NULL);
}
/* The WebP API expects data in RGBA order. The pix stores
* in host-dependent order with R as the MSB and A as the LSB.
* On little-endian machines, the bytes in the word must
* be swapped; e.g., R goes from byte 0 (LSB) to byte 3 (MSB).
* No swapping is necessary for big-endians. */
pixEndianByteSwap(pix);
return pix;
}
jlong Java_com_googlecode_leptonica_android_ReadFile_nativeReadBitmap(JNIEnv *env, jclass clazz,
jobject bitmap) {
LOGV(__FUNCTION__);
l_int32 w, h, d;
AndroidBitmapInfo info;
void* pixels;
int ret;
if ((ret = AndroidBitmap_getInfo(env, bitmap, &info)) < 0) {
LOGE("AndroidBitmap_getInfo() failed ! error=%d", ret);
return JNI_FALSE;
}
if (info.format != ANDROID_BITMAP_FORMAT_RGBA_8888) {
LOGE("Bitmap format is not RGBA_8888 !");
return JNI_FALSE;
}
if ((ret = AndroidBitmap_lockPixels(env, bitmap, &pixels)) < 0) {
LOGE("AndroidBitmap_lockPixels() failed ! error=%d", ret);
return JNI_FALSE;
}
PIX *pixd = pixCreate(info.width, info.height, 32);
l_uint8 *src = (l_uint8 *) pixels;
l_uint8 *dst = (l_uint8 *) pixGetData(pixd);
l_int32 srcBpl = (info.stride);
l_int32 dstBpl = pixGetWpl(pixd)*4;
for (int dy = 0; dy < info.height; dy++) {
memcpy(dst, src, 4 * info.width);
dst += dstBpl;
src += srcBpl;
}
pixEndianByteSwap(pixd);
AndroidBitmap_unlockPixels(env, bitmap);
return (jlong) pixd;
}
/*!
* pixReadMemWebP()
*
* Input: filedata (webp compressed data in memory)
* filesize (number of bytes in data)
* Return: pix (32 bpp), or null on error
*
* Notes:
* (1) When the encoded data only has 3 channels (no alpha),
* WebPDecodeRGBAInto() generates a raster of 32-bit pixels, with
* the alpha channel set to opaque (255).
* (2) We don't need to use the gnu runtime functions like fmemopen()
* for redirecting data from a stream to memory, because
* the webp library has been written with memory-to-memory
* functions at the lowest level (which is good!). And, in
* any event, fmemopen() doesn't work with l_binaryReadStream().
*/
PIX *
pixReadMemWebP(const l_uint8 *filedata,
size_t filesize)
{
l_uint8 *out = NULL;
l_int32 w, h, has_alpha, wpl, stride;
l_uint32 *data;
size_t size;
PIX *pix;
WebPBitstreamFeatures features;
PROCNAME("pixReadMemWebP");
if (!filedata)
return (PIX *)ERROR_PTR("filedata not defined", procName, NULL);
if (WebPGetFeatures(filedata, filesize, &features))
return (PIX *)ERROR_PTR("Invalid WebP file", procName, NULL);
w = features.width;
h = features.height;
has_alpha = features.has_alpha;
/* Write from compressed Y,U,V arrays to pix raster data */
pix = pixCreate(w, h, 32);
if (has_alpha) pixSetSpp(pix, 4);
data = pixGetData(pix);
wpl = pixGetWpl(pix);
stride = wpl * 4;
size = stride * h;
out = WebPDecodeRGBAInto(filedata, filesize, (uint8_t *)data, size,
stride);
if (out == NULL) { /* error: out should also point to data */
pixDestroy(&pix);
return (PIX *)ERROR_PTR("WebP decode failed", procName, NULL);
}
/* WebP decoder emits opposite byte order for RGBA components */
pixEndianByteSwap(pix);
return pix;
}
/*!
* pixWriteMemWebP()
*
* Input: &encdata (<return> webp encoded data of pixs)
* &encsize (<return> size of webp encoded data)
* pixs (any depth, cmapped OK)
* quality (0 - 100; default ~80)
* lossless (use 1 for lossless; 0 for lossy)
* Return: 0 if OK, 1 on error
*
* Notes:
* (1) Lossless and lossy encoding are entirely different in webp.
* @quality applies to lossy, and is ignored for lossless.
* (2) The input image is converted to RGB if necessary. If spp == 3,
* we set the alpha channel to fully opaque (255), and
* WebPEncodeRGBA() then removes the alpha chunk when encoding,
* setting the internal header field has_alpha to 0.
*/
l_int32
pixWriteMemWebP(l_uint8 **pencdata,
size_t *pencsize,
PIX *pixs,
l_int32 quality,
l_int32 lossless)
{
l_int32 w, h, d, wpl, stride;
l_uint32 *data;
PIX *pix1, *pix2;
PROCNAME("pixWriteMemWebP");
if (!pencdata)
return ERROR_INT("&encdata not defined", procName, 1);
*pencdata = NULL;
if (!pencsize)
return ERROR_INT("&encsize not defined", procName, 1);
*pencsize = 0;
if (!pixs)
return ERROR_INT("&pixs not defined", procName, 1);
if (lossless == 0 && (quality < 0 || quality > 100))
return ERROR_INT("quality not in [0 ... 100]", procName, 1);
if ((pix1 = pixRemoveColormap(pixs, REMOVE_CMAP_TO_FULL_COLOR)) == NULL)
return ERROR_INT("failure to remove color map", procName, 1);
/* Convert to rgb if not 32 bpp; pix2 must not be a clone of pixs. */
if (pixGetDepth(pix1) != 32)
pix2 = pixConvertTo32(pix1);
else
pix2 = pixCopy(NULL, pix1);
pixDestroy(&pix1);
pixGetDimensions(pix2, &w, &h, &d);
if (w <= 0 || h <= 0 || d != 32) {
pixDestroy(&pix2);
return ERROR_INT("pix2 not 32 bpp or of 0 size", procName, 1);
}
/* If spp == 3, need to set alpha layer to opaque (all 1s). */
if (pixGetSpp(pix2) == 3)
pixSetComponentArbitrary(pix2, L_ALPHA_CHANNEL, 255);
/* Webp encoder assumes big-endian byte order for RGBA components */
pixEndianByteSwap(pix2);
wpl = pixGetWpl(pix2);
data = pixGetData(pix2);
stride = wpl * 4;
if (lossless) {
*pencsize = WebPEncodeLosslessRGBA((uint8_t *)data, w, h,
stride, pencdata);
} else {
*pencsize = WebPEncodeRGBA((uint8_t *)data, w, h, stride,
quality, pencdata);
}
pixDestroy(&pix2);
if (*pencsize == 0) {
free(pencdata);
*pencdata = NULL;
return ERROR_INT("webp encoding failed", procName, 1);
}
return 0;
}
/*!
* pixWriteStreamPng()
*
* Input: stream
* pix
* gamma (use 0.0 if gamma is not defined)
* Return: 0 if OK; 1 on error
*
* Notes:
* (1) If called from pixWriteStream(), the stream is positioned
* at the beginning of the file.
* (2) To do sequential writes of png format images to a stream,
* use pixWriteStreamPng() directly.
* (3) gamma is an optional png chunk. If no gamma value is to be
* placed into the file, use gamma = 0.0. Otherwise, if
* gamma > 0.0, its value is written into the header.
* (4) The use of gamma in png is highly problematic. For an illuminating
* discussion, see: http://hsivonen.iki.fi/png-gamma/
* (5) What is the effect/meaning of gamma in the png file? This
* gamma, which we can call the 'source' gamma, is the
* inverse of the gamma that was used in enhance.c to brighten
* or darken images. The 'source' gamma is supposed to indicate
* the intensity mapping that was done at the time the
* image was captured. Display programs typically apply a
* 'display' gamma of 2.2 to the output, which is intended
* to linearize the intensity based on the response of
* thermionic tubes (CRTs). Flat panel LCDs have typically
* been designed to give a similar response as CRTs (call it
* "backward compatibility"). The 'display' gamma is
* in some sense the inverse of the 'source' gamma.
* jpeg encoders attached to scanners and cameras will lighten
* the pixels, applying a gamma corresponding to approximately
* a square-root relation of output vs input:
* output = input^(gamma)
* where gamma is often set near 0.4545 (1/gamma is 2.2).
* This is stored in the image file. Then if the display
* program reads the gamma, it will apply a display gamma,
* typically about 2.2; the product is 1.0, and the
* display program produces a linear output. This works because
* the dark colors were appropriately boosted by the scanner,
* as described by the 'source' gamma, so they should not
* be further boosted by the display program.
* (6) As an example, with xv and display, if no gamma is stored,
* the program acts as if gamma were 0.4545, multiplies this by 2.2,
* and does a linear rendering. Taking this as a baseline
* brightness, if the stored gamma is:
* > 0.4545, the image is rendered lighter than baseline
* < 0.4545, the image is rendered darker than baseline
* In contrast, gqview seems to ignore the gamma chunk in png.
* (7) The only valid pixel depths in leptonica are 1, 2, 4, 8, 16
* and 32. However, it is possible, and in some cases desirable,
* to write out a png file using an rgb pix that has 24 bpp.
* For example, the open source xpdf SplashBitmap class generates
* 24 bpp rgb images. Consequently, we anble writing 24 bpp pix.
* To generate such a pix, you can make a 24 bpp pix without data
* and assign the data array to the pix; e.g.,
* pix = pixCreateHeader(w, h, 24);
* pixSetData(pix, rgbdata);
* See pixConvert32To24() for an example, where we get rgbdata
* from the 32 bpp pix. Caution: do not call pixSetPadBits(),
* because the alignment is wrong and you may erase part of the
* last pixel on each line.
*/
l_int32
pixWriteStreamPng(FILE *fp,
PIX *pix,
l_float32 gamma)
{
char commentstring[] = "Comment";
l_int32 i, j, k;
l_int32 wpl, d, cmflag;
l_int32 ncolors;
l_int32 *rmap, *gmap, *bmap;
l_uint32 *data, *ppixel;
png_byte bit_depth, color_type;
png_uint_32 w, h;
png_uint_32 xres, yres;
png_bytep *row_pointers;
png_bytep rowbuffer;
png_structp png_ptr;
png_infop info_ptr;
png_colorp palette;
PIX *pixt;
PIXCMAP *cmap;
char *text;
PROCNAME("pixWriteStreamPng");
if (!fp)
return ERROR_INT("stream not open", procName, 1);
if (!pix)
return ERROR_INT("pix not defined", procName, 1);
/* Allocate the 2 data structures */
if ((png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,
(png_voidp)NULL, NULL, NULL)) == NULL)
return ERROR_INT("png_ptr not made", procName, 1);
if ((info_ptr = png_create_info_struct(png_ptr)) == NULL) {
png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
return ERROR_INT("info_ptr not made", procName, 1);
}
/* Set up png setjmp error handling */
if (setjmp(png_jmpbuf(png_ptr))) {
png_destroy_write_struct(&png_ptr, &info_ptr);
return ERROR_INT("internal png error", procName, 1);
}
png_init_io(png_ptr, fp);
/* With best zlib compression (9), get between 1 and 10% improvement
* over default (5), but the compression is 3 to 10 times slower.
* Our default compression is the zlib default (5). */
png_set_compression_level(png_ptr, var_ZLIB_COMPRESSION);
w = pixGetWidth(pix);
h = pixGetHeight(pix);
d = pixGetDepth(pix);
if ((cmap = pixGetColormap(pix)))
cmflag = 1;
else
cmflag = 0;
/* Set the color type and bit depth. */
if (d == 32 && var_PNG_WRITE_ALPHA == 1) {
bit_depth = 8;
color_type = PNG_COLOR_TYPE_RGBA; /* 6 */
cmflag = 0; /* ignore if it exists */
}
else if (d == 24 || d == 32) {
bit_depth = 8;
color_type = PNG_COLOR_TYPE_RGB; /* 2 */
cmflag = 0; /* ignore if it exists */
}
else {
bit_depth = d;
color_type = PNG_COLOR_TYPE_GRAY; /* 0 */
}
if (cmflag)
color_type = PNG_COLOR_TYPE_PALETTE; /* 3 */
#if DEBUG
fprintf(stderr, "cmflag = %d, bit_depth = %d, color_type = %d\n",
cmflag, bit_depth, color_type);
#endif /* DEBUG */
png_set_IHDR(png_ptr, info_ptr, w, h, bit_depth, color_type,
PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE,
PNG_FILTER_TYPE_BASE);
/* Store resolution in ppm, if known */
xres = (png_uint_32)(39.37 * (l_float32)pixGetXRes(pix) + 0.5);
yres = (png_uint_32)(39.37 * (l_float32)pixGetYRes(pix) + 0.5);
if ((xres == 0) || (yres == 0))
png_set_pHYs(png_ptr, info_ptr, 0, 0, PNG_RESOLUTION_UNKNOWN);
else
png_set_pHYs(png_ptr, info_ptr, xres, yres, PNG_RESOLUTION_METER);
if (cmflag) {
pixcmapToArrays(cmap, &rmap, &gmap, &bmap);
ncolors = pixcmapGetCount(cmap);
/* Make and save the palette */
if ((palette = (png_colorp)(CALLOC(ncolors, sizeof(png_color))))
== NULL)
return ERROR_INT("palette not made", procName, 1);
for (i = 0; i < ncolors; i++) {
palette[i].red = (png_byte)rmap[i];
palette[i].green = (png_byte)gmap[i];
palette[i].blue = (png_byte)bmap[i];
}
png_set_PLTE(png_ptr, info_ptr, palette, (int)ncolors);
FREE(rmap);
FREE(gmap);
FREE(bmap);
}
/* 0.4545 is treated as the default by some image
* display programs (not gqview). A value > 0.4545 will
* lighten an image as displayed by xv, display, etc. */
if (gamma > 0.0)
png_set_gAMA(png_ptr, info_ptr, (l_float64)gamma);
if ((text = pixGetText(pix))) {
png_text text_chunk;
text_chunk.compression = PNG_TEXT_COMPRESSION_NONE;
text_chunk.key = commentstring;
text_chunk.text = text;
text_chunk.text_length = strlen(text);
#ifdef PNG_ITXT_SUPPORTED
text_chunk.itxt_length = 0;
text_chunk.lang = NULL;
text_chunk.lang_key = NULL;
#endif
png_set_text(png_ptr, info_ptr, &text_chunk, 1);
}
/* Write header and palette info */
png_write_info(png_ptr, info_ptr);
if ((d != 32) && (d != 24)) { /* not rgb color */
/* Generate a temporary pix with bytes swapped.
* For a binary image, there are two conditions in
* which you must first invert the data for writing png:
* (a) no colormap
* (b) colormap with BLACK set to 0
* png writes binary with BLACK = 0, unless contradicted
* by a colormap. If the colormap has BLACK = "1"
* (typ. about 255), do not invert the data. If there
* is no colormap, you must invert the data to store
* in default BLACK = 0 state. */
if (d == 1 &&
(!cmap || (cmap && ((l_uint8 *)(cmap->array))[0] == 0x0))) {
pixt = pixInvert(NULL, pix);
pixEndianByteSwap(pixt);
}
else
pixt = pixEndianByteSwapNew(pix);
if (!pixt) {
png_destroy_write_struct(&png_ptr, &info_ptr);
return ERROR_INT("pixt not made", procName, 1);
}
/* Make and assign array of image row pointers */
if ((row_pointers = (png_bytep *)CALLOC(h, sizeof(png_bytep))) == NULL)
return ERROR_INT("row-pointers not made", procName, 1);
wpl = pixGetWpl(pixt);
data = pixGetData(pixt);
for (i = 0; i < h; i++)
row_pointers[i] = (png_bytep)(data + i * wpl);
png_set_rows(png_ptr, info_ptr, row_pointers);
/* Transfer the data */
png_write_image(png_ptr, row_pointers);
png_write_end(png_ptr, info_ptr);
if (cmflag)
FREE(palette);
FREE(row_pointers);
pixDestroy(&pixt);
png_destroy_write_struct(&png_ptr, &info_ptr);
return 0;
}
/* For rgb, compose and write a row at a time */
data = pixGetData(pix);
wpl = pixGetWpl(pix);
if (d == 24) { /* See note 7 above: special case of 24 bpp rgb */
for (i = 0; i < h; i++) {
ppixel = data + i * wpl;
png_write_rows(png_ptr, (png_bytepp)&ppixel, 1);
}
}
else { /* 32 bpp rgb and rgba */
if ((rowbuffer = (png_bytep)CALLOC(w, 4)) == NULL)
return ERROR_INT("rowbuffer not made", procName, 1);
for (i = 0; i < h; i++) {
ppixel = data + i * wpl;
for (j = k = 0; j < w; j++) {
rowbuffer[k++] = GET_DATA_BYTE(ppixel, COLOR_RED);
rowbuffer[k++] = GET_DATA_BYTE(ppixel, COLOR_GREEN);
rowbuffer[k++] = GET_DATA_BYTE(ppixel, COLOR_BLUE);
if (var_PNG_WRITE_ALPHA == 1)
rowbuffer[k++] = GET_DATA_BYTE(ppixel, L_ALPHA_CHANNEL);
ppixel++;
}
png_write_rows(png_ptr, &rowbuffer, 1);
}
FREE(rowbuffer);
}
png_write_end(png_ptr, info_ptr);
if (cmflag)
FREE(palette);
png_destroy_write_struct(&png_ptr, &info_ptr);
return 0;
}
/*!
* \brief pixWriteMemBmp()
*
* \param[out] pfdata data of bmp formatted image
* \param[out] pfsize size of returned data
* \param[in] pixs 1, 2, 4, 8, 16, 32 bpp
* \return 0 if OK, 1 on error
*
* <pre>
* Notes:
* (1) 2 bpp bmp files are not valid in the spec, and are
* written as 8 bpp.
* (2) pix with depth <= 8 bpp are written with a colormap.
* 16 bpp gray and 32 bpp rgb pix are written without a colormap.
* (3) The transparency component in an rgb pix is ignored.
* All 32 bpp pix have the bmp alpha component set to 255 (opaque).
* (4) The bmp colormap entries, RGBA_QUAD, are the same as
* the ones used for colormaps in leptonica. This allows
* a simple memcpy for bmp output.
* </pre>
*/
l_int32
pixWriteMemBmp(l_uint8 **pfdata,
size_t *pfsize,
PIX *pixs)
{
l_uint8 pel[4];
l_uint8 *cta = NULL; /* address of the bmp color table array */
l_uint8 *fdata, *data, *fmdata;
l_int32 cmaplen; /* number of bytes in the bmp colormap */
l_int32 ncolors, val, stepsize;
l_int32 w, h, d, fdepth, xres, yres;
l_int32 pixWpl, pixBpl, extrabytes, fBpl, fWpl, i, j, k;
l_int32 heapcm; /* extra copy of cta on the heap ? 1 : 0 */
l_uint32 offbytes, fimagebytes;
l_uint32 *line, *pword;
size_t fsize;
BMP_FH *bmpfh;
BMP_IH *bmpih;
PIX *pix;
PIXCMAP *cmap;
RGBA_QUAD *pquad;
PROCNAME("pixWriteMemBmp");
if (pfdata) *pfdata = NULL;
if (pfsize) *pfsize = 0;
if (!pfdata)
return ERROR_INT("&fdata not defined", procName, 1 );
if (!pfsize)
return ERROR_INT("&fsize not defined", procName, 1 );
if (!pixs)
return ERROR_INT("pixs not defined", procName, 1);
pixGetDimensions(pixs, &w, &h, &d);
if (d == 2) {
L_WARNING("2 bpp files can't be read; converting to 8 bpp\n", procName);
pix = pixConvert2To8(pixs, 0, 85, 170, 255, 1);
d = 8;
} else {
pix = pixCopy(NULL, pixs);
}
fdepth = (d == 32) ? 24 : d;
/* Resolution is given in pixels/meter */
xres = (l_int32)(39.37 * (l_float32)pixGetXRes(pix) + 0.5);
yres = (l_int32)(39.37 * (l_float32)pixGetYRes(pix) + 0.5);
pixWpl = pixGetWpl(pix);
pixBpl = 4 * pixWpl;
fWpl = (w * fdepth + 31) / 32;
fBpl = 4 * fWpl;
fimagebytes = h * fBpl;
if (fimagebytes > 4LL * L_MAX_ALLOWED_PIXELS) {
pixDestroy(&pix);
return ERROR_INT("image data is too large", procName, 1);
}
/* If not rgb or 16 bpp, the bmp data is required to have a colormap */
heapcm = 0;
if (d == 32 || d == 16) { /* 24 bpp rgb or 16 bpp: no colormap */
ncolors = 0;
cmaplen = 0;
} else if ((cmap = pixGetColormap(pix))) { /* existing colormap */
ncolors = pixcmapGetCount(cmap);
cmaplen = ncolors * sizeof(RGBA_QUAD);
cta = (l_uint8 *)cmap->array;
} else { /* no existing colormap; d <= 8; make a binary or gray one */
if (d == 1) {
cmaplen = sizeof(bwmap);
ncolors = 2;
cta = (l_uint8 *)bwmap;
} else { /* d = 2,4,8; use a grayscale output colormap */
ncolors = 1 << fdepth;
cmaplen = ncolors * sizeof(RGBA_QUAD);
heapcm = 1;
cta = (l_uint8 *)LEPT_CALLOC(cmaplen, 1);
stepsize = 255 / (ncolors - 1);
for (i = 0, val = 0, pquad = (RGBA_QUAD *)cta;
i < ncolors;
i++, val += stepsize, pquad++) {
pquad->blue = pquad->green = pquad->red = val;
pquad->alpha = 255; /* opaque */
}
}
}
#if DEBUG
{l_uint8 *pcmptr;
pcmptr = (l_uint8 *)pixGetColormap(pix)->array;
fprintf(stderr, "Pix colormap[0] = %c%c%c%d\n",
pcmptr[0], pcmptr[1], pcmptr[2], pcmptr[3]);
fprintf(stderr, "Pix colormap[1] = %c%c%c%d\n",
pcmptr[4], pcmptr[5], pcmptr[6], pcmptr[7]);
}
#endif /* DEBUG */
offbytes = BMP_FHBYTES + BMP_IHBYTES + cmaplen;
fsize = offbytes + fimagebytes;
fdata = (l_uint8 *)LEPT_CALLOC(fsize, 1);
*pfdata = fdata;
*pfsize = fsize;
/* Convert to little-endian and write the file header data */
bmpfh = (BMP_FH *)fdata;
bmpfh->bfType = convertOnBigEnd16(BMP_ID);
bmpfh->bfSize = convertOnBigEnd16(fsize & 0x0000ffff);
bmpfh->bfFill1 = convertOnBigEnd16((fsize >> 16) & 0x0000ffff);
bmpfh->bfOffBits = convertOnBigEnd16(offbytes & 0x0000ffff);
bmpfh->bfFill2 = convertOnBigEnd16((offbytes >> 16) & 0x0000ffff);
/* Convert to little-endian and write the info header data */
bmpih = (BMP_IH *)(fdata + BMP_FHBYTES);
bmpih->biSize = convertOnBigEnd32(BMP_IHBYTES);
bmpih->biWidth = convertOnBigEnd32(w);
bmpih->biHeight = convertOnBigEnd32(h);
bmpih->biPlanes = convertOnBigEnd16(1);
bmpih->biBitCount = convertOnBigEnd16(fdepth);
bmpih->biSizeImage = convertOnBigEnd32(fimagebytes);
bmpih->biXPelsPerMeter = convertOnBigEnd32(xres);
bmpih->biYPelsPerMeter = convertOnBigEnd32(yres);
bmpih->biClrUsed = convertOnBigEnd32(ncolors);
bmpih->biClrImportant = convertOnBigEnd32(ncolors);
/* Copy the colormap data and free the cta if necessary */
if (ncolors > 0) {
memcpy(fdata + BMP_FHBYTES + BMP_IHBYTES, cta, cmaplen);
if (heapcm) LEPT_FREE(cta);
}
/* When you write a binary image with a colormap
* that sets BLACK to 0, you must invert the data */
if (fdepth == 1 && cmap && ((l_uint8 *)(cmap->array))[0] == 0x0) {
pixInvert(pix, pix);
}
/* An endian byte swap is also required */
pixEndianByteSwap(pix);
/* Transfer the image data. Image origin for bmp is at lower right. */
fmdata = fdata + offbytes;
if (fdepth != 24) { /* typ 1 or 8 bpp */
data = (l_uint8 *)pixGetData(pix) + pixBpl * (h - 1);
for (i = 0; i < h; i++) {
memcpy(fmdata, data, fBpl);
data -= pixBpl;
fmdata += fBpl;
}
} else { /* 32 bpp pix; 24 bpp file
* See the comments in pixReadStreamBmp() to
* understand the logic behind the pixel ordering below.
* Note that we have again done an endian swap on
* little endian machines before arriving here, so that
* the bytes are ordered on both platforms as:
Red Green Blue --
|-----------|------------|-----------|-----------|
*/
extrabytes = fBpl - 3 * w;
line = pixGetData(pix) + pixWpl * (h - 1);
for (i = 0; i < h; i++) {
for (j = 0; j < w; j++) {
pword = line + j;
pel[2] = *((l_uint8 *)pword + COLOR_RED);
pel[1] = *((l_uint8 *)pword + COLOR_GREEN);
pel[0] = *((l_uint8 *)pword + COLOR_BLUE);
memcpy(fmdata, &pel, 3);
fmdata += 3;
}
if (extrabytes) {
for (k = 0; k < extrabytes; k++) {
memcpy(fmdata, &pel, 1);
fmdata++;
}
}
line -= pixWpl;
}
}
pixDestroy(&pix);
return 0;
}
/*!
* \brief pixReadMemBmp()
*
* \param[in] cdata bmp data
* \param[in] size number of bytes of bmp-formatted data
* \return pix, or NULL on error
*/
PIX *
pixReadMemBmp(const l_uint8 *cdata,
size_t size)
{
l_uint8 pel[4];
l_uint8 *cmapBuf, *fdata, *data;
l_int16 bftype, offset, depth, d;
l_int32 width, height, xres, yres, compression, imagebytes;
l_int32 cmapbytes, cmapEntries;
l_int32 fdatabpl, extrabytes, pixWpl, pixBpl, i, j, k;
l_uint32 *line, *pixdata, *pword;
l_int64 npixels;
BMP_FH *bmpfh;
BMP_IH *bmpih;
PIX *pix, *pix1;
PIXCMAP *cmap;
PROCNAME("pixReadMemBmp");
if (!cdata)
return (PIX *)ERROR_PTR("cdata not defined", procName, NULL);
if (size < sizeof(BMP_FH) + sizeof(BMP_IH))
return (PIX *)ERROR_PTR("bmf size error", procName, NULL);
/* Verify this is an uncompressed bmp */
bmpfh = (BMP_FH *)cdata;
bftype = convertOnBigEnd16(bmpfh->bfType);
if (bftype != BMP_ID)
return (PIX *)ERROR_PTR("not bmf format", procName, NULL);
bmpih = (BMP_IH *)(cdata + BMP_FHBYTES);
if (!bmpih)
return (PIX *)ERROR_PTR("bmpih not defined", procName, NULL);
compression = convertOnBigEnd32(bmpih->biCompression);
if (compression != 0)
return (PIX *)ERROR_PTR("cannot read compressed BMP files",
procName, NULL);
/* Read the rest of the useful header information */
offset = convertOnBigEnd16(bmpfh->bfOffBits);
width = convertOnBigEnd32(bmpih->biWidth);
height = convertOnBigEnd32(bmpih->biHeight);
depth = convertOnBigEnd16(bmpih->biBitCount);
imagebytes = convertOnBigEnd32(bmpih->biSizeImage);
xres = convertOnBigEnd32(bmpih->biXPelsPerMeter);
yres = convertOnBigEnd32(bmpih->biYPelsPerMeter);
/* Some sanity checking. We impose limits on the image
* dimensions and number of pixels. We make sure the file
* is the correct size to hold the amount of uncompressed data
* that is specified in the header. The number of colormap
* entries is checked: it can be either 0 (no cmap) or some
* number between 2 and 256.
* Note that the imagebytes for uncompressed images is either
* 0 or the size of the file data. (The fact that it can
* be 0 is perhaps some legacy glitch). */
if (width < 1)
return (PIX *)ERROR_PTR("width < 1", procName, NULL);
if (width > L_MAX_ALLOWED_WIDTH)
return (PIX *)ERROR_PTR("width too large", procName, NULL);
if (height < 1)
return (PIX *)ERROR_PTR("height < 1", procName, NULL);
if (height > L_MAX_ALLOWED_HEIGHT)
return (PIX *)ERROR_PTR("height too large", procName, NULL);
npixels = 1LL * width * height;
if (npixels > L_MAX_ALLOWED_PIXELS)
return (PIX *)ERROR_PTR("npixels too large", procName, NULL);
if (depth != 1 && depth != 2 && depth != 4 && depth != 8 &&
depth != 16 && depth != 24 && depth != 32)
return (PIX *)ERROR_PTR("depth not in {1, 2, 4, 8, 16, 24, 32}",
procName,NULL);
fdatabpl = 4 * ((1LL * width * depth + 31)/32);
if (imagebytes != 0 && imagebytes != fdatabpl * height)
return (PIX *)ERROR_PTR("invalid imagebytes", procName, NULL);
cmapbytes = offset - BMP_FHBYTES - BMP_IHBYTES;
cmapEntries = cmapbytes / sizeof(RGBA_QUAD);
if (cmapEntries < 0 || cmapEntries == 1)
return (PIX *)ERROR_PTR("invalid: cmap size < 0 or 1", procName, NULL);
if (cmapEntries > L_MAX_ALLOWED_NUM_COLORS)
return (PIX *)ERROR_PTR("invalid cmap: too large", procName,NULL);
if (size != 1LL * offset + 1LL * fdatabpl * height)
return (PIX *)ERROR_PTR("size incommensurate with image data",
procName,NULL);
/* Handle the colormap */
cmapBuf = NULL;
if (cmapEntries > 0) {
if ((cmapBuf = (l_uint8 *)LEPT_CALLOC(cmapEntries, sizeof(RGBA_QUAD)))
== NULL)
return (PIX *)ERROR_PTR("cmapBuf alloc fail", procName, NULL );
/* Read the colormap entry data from bmp. The RGBA_QUAD colormap
* entries are used for both bmp and leptonica colormaps. */
memcpy(cmapBuf, cdata + BMP_FHBYTES + BMP_IHBYTES,
sizeof(RGBA_QUAD) * cmapEntries);
}
/* Make a 32 bpp pix if depth is 24 bpp */
d = (depth == 24) ? 32 : depth;
if ((pix = pixCreate(width, height, d)) == NULL) {
LEPT_FREE(cmapBuf);
return (PIX *)ERROR_PTR( "pix not made", procName, NULL);
}
pixSetXRes(pix, (l_int32)((l_float32)xres / 39.37 + 0.5)); /* to ppi */
pixSetYRes(pix, (l_int32)((l_float32)yres / 39.37 + 0.5)); /* to ppi */
pixSetInputFormat(pix, IFF_BMP);
pixWpl = pixGetWpl(pix);
pixBpl = 4 * pixWpl;
/* Convert the bmp colormap to a pixcmap */
cmap = NULL;
if (cmapEntries > 0) { /* import the colormap to the pix cmap */
cmap = pixcmapCreate(L_MIN(d, 8));
LEPT_FREE(cmap->array); /* remove generated cmap array */
cmap->array = (void *)cmapBuf; /* and replace */
cmap->n = L_MIN(cmapEntries, 256);
for (i = 0; i < cmap->n; i++) /* set all colors opaque */
pixcmapSetAlpha (cmap, i, 255);
}
pixSetColormap(pix, cmap);
/* Acquire the image data. Image origin for bmp is at lower right. */
fdata = (l_uint8 *)cdata + offset; /* start of the bmp image data */
pixdata = pixGetData(pix);
if (depth != 24) { /* typ. 1 or 8 bpp */
data = (l_uint8 *)pixdata + pixBpl * (height - 1);
for (i = 0; i < height; i++) {
memcpy(data, fdata, fdatabpl);
fdata += fdatabpl;
data -= pixBpl;
}
} else { /* 24 bpp file; 32 bpp pix
* Note: for bmp files, pel[0] is blue, pel[1] is green,
* and pel[2] is red. This is opposite to the storage
* in the pix, which puts the red pixel in the 0 byte,
* the green in the 1 byte and the blue in the 2 byte.
* Note also that all words are endian flipped after
* assignment on L_LITTLE_ENDIAN platforms.
*
* We can then make these assignments for little endians:
* SET_DATA_BYTE(pword, 1, pel[0]); blue
* SET_DATA_BYTE(pword, 2, pel[1]); green
* SET_DATA_BYTE(pword, 3, pel[2]); red
* This looks like:
* 3 (R) 2 (G) 1 (B) 0
* |-----------|------------|-----------|-----------|
* and after byte flipping:
* 3 2 (B) 1 (G) 0 (R)
* |-----------|------------|-----------|-----------|
*
* For big endians we set:
* SET_DATA_BYTE(pword, 2, pel[0]); blue
* SET_DATA_BYTE(pword, 1, pel[1]); green
* SET_DATA_BYTE(pword, 0, pel[2]); red
* This looks like:
* 0 (R) 1 (G) 2 (B) 3
* |-----------|------------|-----------|-----------|
* so in both cases we get the correct assignment in the PIX.
*
* Can we do a platform-independent assignment?
* Yes, set the bytes without using macros:
* *((l_uint8 *)pword) = pel[2]; red
* *((l_uint8 *)pword + 1) = pel[1]; green
* *((l_uint8 *)pword + 2) = pel[0]; blue
* For little endians, before flipping, this looks again like:
* 3 (R) 2 (G) 1 (B) 0
* |-----------|------------|-----------|-----------|
*/
extrabytes = fdatabpl - 3 * width;
line = pixdata + pixWpl * (height - 1);
for (i = 0; i < height; i++) {
for (j = 0; j < width; j++) {
pword = line + j;
memcpy(&pel, fdata, 3);
fdata += 3;
*((l_uint8 *)pword + COLOR_RED) = pel[2];
*((l_uint8 *)pword + COLOR_GREEN) = pel[1];
*((l_uint8 *)pword + COLOR_BLUE) = pel[0];
}
if (extrabytes) {
for (k = 0; k < extrabytes; k++) {
memcpy(&pel, fdata, 1);
fdata++;
}
}
line -= pixWpl;
}
}
pixEndianByteSwap(pix);
/* ----------------------------------------------
* The bmp colormap determines the values of black
* and white pixels for binary in the following way:
* (a) white = 0 [255], black = 1 [0]
* 255, 255, 255, 255, 0, 0, 0, 255
* (b) black = 0 [0], white = 1 [255]
* 0, 0, 0, 255, 255, 255, 255, 255
* We have no need for a 1 bpp pix with a colormap!
* Note: the alpha component here is 255 (opaque)
* ---------------------------------------------- */
if (depth == 1 && cmap) {
pix1 = pixRemoveColormap(pix, REMOVE_CMAP_TO_BINARY);
pixDestroy(&pix);
pix = pix1; /* rename */
}
return pix;
}
jboolean Java_com_googlecode_leptonica_android_WriteFile_nativeWriteBitmap(JNIEnv *env,
jclass clazz,
jlong nativePix,
jobject bitmap) {
PIX *pixs = (PIX *) nativePix;
l_int32 w, h, d;
AndroidBitmapInfo info;
void* pixels;
int ret;
if ((ret = AndroidBitmap_getInfo(env, bitmap, &info)) < 0) {
LOGE("AndroidBitmap_getInfo() failed ! error=%d", ret);
return JNI_FALSE;
}
if (info.format != ANDROID_BITMAP_FORMAT_RGBA_8888) {
LOGE("Bitmap format is not RGBA_8888 !");
return JNI_FALSE;
}
pixGetDimensions(pixs, &w, &h, &d);
if (w != info.width || h != info.height) {
LOGE("Bitmap width and height do not match Pix dimensions!");
return JNI_FALSE;
}
if ((ret = AndroidBitmap_lockPixels(env, bitmap, &pixels)) < 0) {
LOGE("AndroidBitmap_lockPixels() failed ! error=%d", ret);
return JNI_FALSE;
}
pixEndianByteSwap(pixs);
l_uint8 *dst = (l_uint8 *) pixels;
l_uint8 *src = (l_uint8 *) pixGetData(pixs);
l_int32 dstBpl = info.stride;
l_int32 srcBpl = 4 * pixGetWpl(pixs);
LOGE("Writing 32bpp RGBA bitmap (w=%d, h=%d, stride=%d) from %dbpp Pix (wpl=%d)", info.width,
info.height, info.stride, d, pixGetWpl(pixs));
for (int dy = 0; dy < info.height; dy++) {
l_uint8 *dstx = dst;
l_uint8 *srcx = src;
if (d == 32) {
memcpy(dst, src, 4 * info.width);
} else if (d == 8) {
for (int dw = 0; dw < info.width; dw++) {
dstx[0] = dstx[1] = dstx[2] = srcx[0];
dstx[3] = 0xFF;
dstx += 4;
srcx += 1;
}
} else if (d == 1) {
for (int dw = 0; dw < info.width; dw++) {
dstx[0] = dstx[1] = dstx[2] = (1 << (7 - (dw & 7)) & srcx[0]) ? 0x00 : 0xFF;
dstx[3] = 0xFF;
dstx += 4;
srcx += ((dw % 8) == 7) ? 1 : 0;
}
}
dst += dstBpl;
src += srcBpl;
}
AndroidBitmap_unlockPixels(env, bitmap);
return JNI_TRUE;
}
/*!
* \brief pixWriteMemWebP()
*
* \param[out] pencdata webp encoded data of pixs
* \param[out] pencsize size of webp encoded data
* \param[in] pixs any depth, cmapped OK
* \param[in] quality 0 - 100; default ~80
* \param[in] lossless use 1 for lossless; 0 for lossy
* \return 0 if OK, 1 on error
*
* <pre>
* Notes:
* (1) Lossless and lossy encoding are entirely different in webp.
* %quality applies to lossy, and is ignored for lossless.
* (2) The input image is converted to RGB if necessary. If spp == 3,
* we set the alpha channel to fully opaque (255), and
* WebPEncodeRGBA() then removes the alpha chunk when encoding,
* setting the internal header field has_alpha to 0.
* </pre>
*/
l_ok
pixWriteMemWebP(l_uint8 **pencdata,
size_t *pencsize,
PIX *pixs,
l_int32 quality,
l_int32 lossless)
{
l_int32 w, h, d, wpl, stride;
l_uint32 *data;
PIX *pix1, *pix2;
PROCNAME("pixWriteMemWebP");
if (!pencdata)
return ERROR_INT("&encdata not defined", procName, 1);
*pencdata = NULL;
if (!pencsize)
return ERROR_INT("&encsize not defined", procName, 1);
*pencsize = 0;
if (!pixs)
return ERROR_INT("&pixs not defined", procName, 1);
if (lossless == 0 && (quality < 0 || quality > 100))
return ERROR_INT("quality not in [0 ... 100]", procName, 1);
if ((pix1 = pixRemoveColormap(pixs, REMOVE_CMAP_TO_FULL_COLOR)) == NULL)
return ERROR_INT("failure to remove color map", procName, 1);
/* Convert to rgb if not 32 bpp; pix2 must not be a clone of pixs. */
if (pixGetDepth(pix1) != 32)
pix2 = pixConvertTo32(pix1);
else
pix2 = pixCopy(NULL, pix1);
pixDestroy(&pix1);
pixGetDimensions(pix2, &w, &h, &d);
if (w <= 0 || h <= 0 || d != 32) {
pixDestroy(&pix2);
return ERROR_INT("pix2 not 32 bpp or of 0 size", procName, 1);
}
/* If spp == 3, need to set alpha layer to opaque (all 1s). */
if (pixGetSpp(pix2) == 3)
pixSetComponentArbitrary(pix2, L_ALPHA_CHANNEL, 255);
/* The WebP API expects data in RGBA order. The pix stores
* in host-dependent order with R as the MSB and A as the LSB.
* On little-endian machines, the bytes in the word must
* be swapped; e.g., R goes from byte 0 (LSB) to byte 3 (MSB).
* No swapping is necessary for big-endians. */
pixEndianByteSwap(pix2);
wpl = pixGetWpl(pix2);
data = pixGetData(pix2);
stride = wpl * 4;
if (lossless) {
*pencsize = WebPEncodeLosslessRGBA((uint8_t *)data, w, h,
stride, pencdata);
} else {
*pencsize = WebPEncodeRGBA((uint8_t *)data, w, h, stride,
quality, pencdata);
}
pixDestroy(&pix2);
if (*pencsize == 0) {
free(*pencdata);
*pencdata = NULL;
return ERROR_INT("webp encoding failed", procName, 1);
}
return 0;
}
/*!
* pixGetWindowsHBITMAP()
*
* Input: pix
* Return: Windows hBitmap, or null on error
*
* Notes:
* (1) It's the responsibility of the caller to destroy the
* returned hBitmap with a call to DeleteObject (or with
* something that eventually calls DeleteObject).
*/
HBITMAP
pixGetWindowsHBITMAP(PIX *pix)
{
l_int32 width, height, depth;
l_uint32 *data;
HBITMAP hBitmap = NULL;
BITMAP bm;
DWORD imageBitsSize;
PIX *pixt = NULL;
PIXCMAP *cmap;
PROCNAME("pixGetWindowsHBITMAP");
if (!pix)
return (HBITMAP)ERROR_PTR("pix not defined", procName, NULL);
pixGetDimensions(pix, &width, &height, &depth);
cmap = pixGetColormap(pix);
if (depth == 24) depth = 32;
if (depth == 2) {
pixt = pixConvert2To8(pix, 0, 85, 170, 255, TRUE);
if (!pixt)
return (HBITMAP)ERROR_PTR("unable to convert pix from 2bpp to 8bpp",
procName, NULL);
depth = pixGetDepth(pixt);
cmap = pixGetColormap(pixt);
}
if (depth < 16) {
if (!cmap)
cmap = pixcmapCreateLinear(depth, 1<<depth);
}
hBitmap = DSCreateDIBSection(width, height, depth, cmap);
if (!hBitmap)
return (HBITMAP)ERROR_PTR("Unable to create HBITMAP", procName, NULL);
/* By default, Windows assumes bottom up images */
if (pixt)
pixt = pixFlipTB(pixt, pixt);
else
pixt = pixFlipTB(NULL, pix);
/* "standard" color table assumes bit off=black */
if (depth == 1) {
pixInvert(pixt, pixt);
}
/* Don't byte swap until done manipulating pix! */
if (depth <= 16)
pixEndianByteSwap(pixt);
GetObject (hBitmap, sizeof(BITMAP), &bm);
imageBitsSize = ImageBitsSize(hBitmap);
data = pixGetData(pixt);
if (data) {
memcpy (bm.bmBits, data, imageBitsSize);
} else {
DeleteObject (hBitmap);
hBitmap = NULL;
}
pixDestroy(&pixt);
return hBitmap;
}
