diff options
Diffstat (limited to 'fitz/image_jpx.c')
| -rw-r--r-- | fitz/image_jpx.c | 253 |
1 files changed, 0 insertions, 253 deletions
diff --git a/fitz/image_jpx.c b/fitz/image_jpx.c deleted file mode 100644 index cd41277d..00000000 --- a/fitz/image_jpx.c +++ /dev/null @@ -1,253 +0,0 @@ -#include "mupdf/fitz.h" - -/* Without the definition of OPJ_STATIC, compilation fails on windows - * due to the use of __stdcall. We believe it is required on some - * linux toolchains too. */ -#define OPJ_STATIC -#ifndef _MSC_VER -#define OPJ_HAVE_STDINT_H -#endif - -#include <openjpeg.h> - -static void fz_opj_error_callback(const char *msg, void *client_data) -{ - fz_context *ctx = (fz_context *)client_data; - fz_warn(ctx, "openjpeg error: %s", msg); -} - -static void fz_opj_warning_callback(const char *msg, void *client_data) -{ - fz_context *ctx = (fz_context *)client_data; - fz_warn(ctx, "openjpeg warning: %s", msg); -} - -static void fz_opj_info_callback(const char *msg, void *client_data) -{ - /* fz_warn("openjpeg info: %s", msg); */ -} - -typedef struct stream_block_s -{ - unsigned char *data; - int size; - int pos; -} stream_block; - -OPJ_SIZE_T stream_read(void * p_buffer, OPJ_SIZE_T p_nb_bytes, void * p_user_data) -{ - stream_block *sb = (stream_block *)p_user_data; - int len; - - len = sb->size - sb->pos; - if (len < 0) - len = 0; - if (len == 0) - return (OPJ_SIZE_T)-1; /* End of file! */ - if ((OPJ_SIZE_T)len > p_nb_bytes) - len = p_nb_bytes; - memcpy(p_buffer, sb->data + sb->pos, len); - sb->pos += len; - return len; -} - -OPJ_OFF_T stream_skip(OPJ_OFF_T skip, void * p_user_data) -{ - stream_block *sb = (stream_block *)p_user_data; - - if (skip > sb->size - sb->pos) - skip = sb->size - sb->pos; - sb->pos += skip; - return sb->pos; -} - -OPJ_BOOL stream_seek(OPJ_OFF_T seek_pos, void * p_user_data) -{ - stream_block *sb = (stream_block *)p_user_data; - - if (seek_pos > sb->size) - return OPJ_FALSE; - sb->pos = seek_pos; - return OPJ_TRUE; -} - -fz_pixmap * -fz_load_jpx(fz_context *ctx, unsigned char *data, int size, fz_colorspace *defcs, int indexed) -{ - fz_pixmap *img; - fz_colorspace *origcs; - opj_dparameters_t params; - opj_codec_t *codec; - opj_image_t *jpx; - opj_stream_t *stream; - fz_colorspace *colorspace; - unsigned char *p; - OPJ_CODEC_FORMAT format; - int a, n, w, h, depth, sgnd; - int x, y, k, v; - stream_block sb; - - if (size < 2) - fz_throw(ctx, FZ_ERROR_GENERIC, "not enough data to determine image format"); - - /* Check for SOC marker -- if found we have a bare J2K stream */ - if (data[0] == 0xFF && data[1] == 0x4F) - format = OPJ_CODEC_J2K; - else - format = OPJ_CODEC_JP2; - - opj_set_default_decoder_parameters(¶ms); - if (indexed) - params.flags |= OPJ_DPARAMETERS_IGNORE_PCLR_CMAP_CDEF_FLAG; - - codec = opj_create_decompress(format); - opj_set_info_handler(codec, fz_opj_info_callback, ctx); - opj_set_warning_handler(codec, fz_opj_warning_callback, ctx); - opj_set_error_handler(codec, fz_opj_error_callback, ctx); - if (!opj_setup_decoder(codec, ¶ms)) - { - fz_throw(ctx, FZ_ERROR_GENERIC, "j2k decode failed"); - } - - stream = opj_stream_default_create(OPJ_TRUE); - sb.data = data; - sb.pos = 0; - sb.size = size; - - opj_stream_set_read_function(stream, stream_read); - opj_stream_set_skip_function(stream, stream_skip); - opj_stream_set_seek_function(stream, stream_seek); - opj_stream_set_user_data(stream, &sb); - /* Set the length to avoid an assert */ - opj_stream_set_user_data_length(stream, size); - - if (!opj_read_header(stream, codec, &jpx)) - { - opj_stream_destroy(stream); - opj_destroy_codec(codec); - fz_throw(ctx, FZ_ERROR_GENERIC, "Failed to read JPX header"); - } - - if (!opj_decode(codec, stream, jpx)) - { - opj_stream_destroy(stream); - opj_destroy_codec(codec); - opj_image_destroy(jpx); - fz_throw(ctx, FZ_ERROR_GENERIC, "Failed to decode JPX image"); - } - - opj_stream_destroy(stream); - opj_destroy_codec(codec); - - /* jpx should never be NULL here, but check anyway */ - if (!jpx) - fz_throw(ctx, FZ_ERROR_GENERIC, "opj_decode failed"); - - for (k = 1; k < (int)jpx->numcomps; k++) - { - if (jpx->comps[k].w != jpx->comps[0].w) - { - opj_image_destroy(jpx); - fz_throw(ctx, FZ_ERROR_GENERIC, "image components have different width"); - } - if (jpx->comps[k].h != jpx->comps[0].h) - { - opj_image_destroy(jpx); - fz_throw(ctx, FZ_ERROR_GENERIC, "image components have different height"); - } - if (jpx->comps[k].prec != jpx->comps[0].prec) - { - opj_image_destroy(jpx); - fz_throw(ctx, FZ_ERROR_GENERIC, "image components have different precision"); - } - } - - n = jpx->numcomps; - w = jpx->comps[0].w; - h = jpx->comps[0].h; - depth = jpx->comps[0].prec; - sgnd = jpx->comps[0].sgnd; - - if (jpx->color_space == OPJ_CLRSPC_SRGB && n == 4) { n = 3; a = 1; } - else if (jpx->color_space == OPJ_CLRSPC_SYCC && n == 4) { n = 3; a = 1; } - else if (n == 2) { n = 1; a = 1; } - else if (n > 4) { n = 4; a = 1; } - else { a = 0; } - - origcs = defcs; - if (defcs) - { - if (defcs->n == n) - { - colorspace = defcs; - } - else - { - fz_warn(ctx, "jpx file and dict colorspaces do not match"); - defcs = NULL; - } - } - - if (!defcs) - { - switch (n) - { - case 1: colorspace = fz_device_gray(ctx); break; - case 3: colorspace = fz_device_rgb(ctx); break; - case 4: colorspace = fz_device_cmyk(ctx); break; - } - } - - fz_try(ctx) - { - img = fz_new_pixmap(ctx, colorspace, w, h); - } - fz_catch(ctx) - { - opj_image_destroy(jpx); - fz_rethrow_message(ctx, "out of memory loading jpx"); - } - - p = img->samples; - for (y = 0; y < h; y++) - { - for (x = 0; x < w; x++) - { - for (k = 0; k < n + a; k++) - { - v = jpx->comps[k].data[y * w + x]; - if (sgnd) - v = v + (1 << (depth - 1)); - if (depth > 8) - v = v >> (depth - 8); - *p++ = v; - } - if (!a) - *p++ = 255; - } - } - - opj_image_destroy(jpx); - - if (a) - { - if (n == 4) - { - fz_pixmap *tmp = fz_new_pixmap(ctx, fz_device_rgb(ctx), w, h); - fz_convert_pixmap(ctx, tmp, img); - fz_drop_pixmap(ctx, img); - img = tmp; - } - fz_premultiply_pixmap(ctx, img); - } - - if (origcs != defcs) - { - fz_pixmap *tmp = fz_new_pixmap(ctx, origcs, w, h); - fz_convert_pixmap(ctx, tmp, img); - fz_drop_pixmap(ctx, img); - img = tmp; - } - - return img; -} |