| /* |
| * Copyright (c) 2005, 2012, 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 "jpeglib.h" |
| #include "jerror.h" |
| |
| #include <setjmp.h> |
| |
| #ifdef __APPLE__ |
| /* use setjmp/longjmp versions that do not save/restore the signal mask */ |
| #define setjmp _setjmp |
| #define longjmp _longjmp |
| #endif |
| |
| /* stream input handling */ |
| |
| typedef struct |
| { |
| struct jpeg_source_mgr pub; /* public fields */ |
| SplashStream * stream; /* source stream */ |
| JOCTET *buffer; /* start of buffer */ |
| boolean start_of_file; /* have we gotten any data yet? */ |
| } stream_source_mgr; |
| |
| typedef stream_source_mgr *stream_src_ptr; |
| |
| #define INPUT_BUF_SIZE 4096 /* choose an efficiently fread'able size */ |
| |
| METHODDEF(void) |
| stream_init_source(j_decompress_ptr cinfo) |
| { |
| stream_src_ptr src = (stream_src_ptr) cinfo->src; |
| |
| src->start_of_file = TRUE; |
| } |
| |
| METHODDEF(boolean) |
| stream_fill_input_buffer(j_decompress_ptr cinfo) |
| { |
| stream_src_ptr src = (stream_src_ptr) cinfo->src; |
| size_t nbytes; |
| |
| |
| nbytes = src->stream->read(src->stream, src->buffer, INPUT_BUF_SIZE); |
| |
| if (nbytes <= 0) { |
| if (src->start_of_file) /* Treat empty input file as fatal error */ |
| ERREXIT(cinfo, JERR_INPUT_EMPTY); |
| WARNMS(cinfo, JWRN_JPEG_EOF); |
| /* Insert a fake EOI marker */ |
| src->buffer[0] = (JOCTET) 0xFF; |
| src->buffer[1] = (JOCTET) JPEG_EOI; |
| nbytes = 2; |
| } |
| |
| src->pub.next_input_byte = src->buffer; |
| src->pub.bytes_in_buffer = nbytes; |
| src->start_of_file = FALSE; |
| |
| return TRUE; |
| } |
| |
| METHODDEF(void) |
| stream_skip_input_data(j_decompress_ptr cinfo, long num_bytes) |
| { |
| stream_src_ptr src = (stream_src_ptr) cinfo->src; |
| |
| if (num_bytes > 0) { |
| while (num_bytes > (long) src->pub.bytes_in_buffer) { |
| num_bytes -= (long) src->pub.bytes_in_buffer; |
| (void) stream_fill_input_buffer(cinfo); |
| } |
| src->pub.next_input_byte += (size_t) num_bytes; |
| src->pub.bytes_in_buffer -= (size_t) num_bytes; |
| } |
| } |
| |
| METHODDEF(void) |
| stream_term_source(j_decompress_ptr cinfo) |
| { |
| } |
| |
| static void |
| set_stream_src(j_decompress_ptr cinfo, SplashStream * stream) |
| { |
| stream_src_ptr src; |
| |
| if (cinfo->src == NULL) { /* first time for this JPEG object? */ |
| cinfo->src = (struct jpeg_source_mgr *) |
| (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, |
| JPOOL_PERMANENT, sizeof(stream_source_mgr)); |
| src = (stream_src_ptr) cinfo->src; |
| src->buffer = (JOCTET *) |
| (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, |
| JPOOL_PERMANENT, INPUT_BUF_SIZE * sizeof(JOCTET)); |
| } |
| |
| src = (stream_src_ptr) cinfo->src; |
| src->pub.init_source = stream_init_source; |
| src->pub.fill_input_buffer = stream_fill_input_buffer; |
| src->pub.skip_input_data = stream_skip_input_data; |
| src->pub.resync_to_restart = jpeg_resync_to_restart; /* use default method */ |
| src->pub.term_source = stream_term_source; |
| src->stream = stream; |
| src->pub.bytes_in_buffer = 0; /* forces fill_input_buffer on first read */ |
| src->pub.next_input_byte = NULL; /* until buffer loaded */ |
| } |
| |
| int |
| SplashDecodeJpeg(Splash * splash, struct jpeg_decompress_struct *cinfo) |
| { |
| int rowStride, stride; |
| JSAMPARRAY buffer; |
| ImageFormat srcFormat; |
| |
| jpeg_read_header(cinfo, TRUE); |
| |
| // SplashScreen jpeg converter expects data in RGB format only |
| cinfo->out_color_space = JCS_RGB; |
| |
| jpeg_start_decompress(cinfo); |
| |
| SplashCleanup(splash); |
| |
| splash->width = cinfo->output_width; |
| splash->height = cinfo->output_height; |
| |
| if (!SAFE_TO_ALLOC(splash->imageFormat.depthBytes, splash->width)) { |
| return 0; |
| } |
| stride = splash->width * splash->imageFormat.depthBytes; |
| |
| if (!SAFE_TO_ALLOC(stride, splash->height)) { |
| return 0; |
| } |
| if (!SAFE_TO_ALLOC(cinfo->output_width, cinfo->output_components)) { |
| return 0; |
| } |
| |
| splash->frameCount = 1; |
| splash->frames = (SplashImage *) malloc(sizeof(SplashImage) * |
| splash->frameCount); |
| if (splash->frames == NULL) { |
| return 0; |
| } |
| memset(splash->frames, 0, sizeof(SplashImage) * |
| splash->frameCount); |
| |
| splash->loopCount = 1; |
| splash->frames[0].delay = 0; |
| splash->frames[0].bitmapBits = malloc(stride * splash->height); |
| if (splash->frames[0].bitmapBits == NULL) { |
| free(splash->frames); |
| return 0; |
| } |
| |
| rowStride = cinfo->output_width * cinfo->output_components; |
| |
| buffer = (*cinfo->mem->alloc_sarray) |
| ((j_common_ptr) cinfo, JPOOL_IMAGE, rowStride, 1); |
| if (buffer == NULL) { |
| free(splash->frames[0].bitmapBits); |
| free(splash->frames); |
| return 0; |
| } |
| |
| initFormat(&srcFormat, 0x00FF0000, 0x0000FF00, 0x000000FF, 0x00000000); |
| srcFormat.byteOrder = BYTE_ORDER_LSBFIRST; |
| srcFormat.depthBytes = 3; |
| srcFormat.fixedBits = 0xFF000000; |
| |
| splash->maskRequired = 0; // reset maskRequired as JPEG can't be transparent |
| |
| while (cinfo->output_scanline < cinfo->output_height) { |
| rgbquad_t *out = |
| (rgbquad_t *) ((byte_t *) splash->frames[0].bitmapBits + |
| cinfo->output_scanline * stride); |
| |
| jpeg_read_scanlines(cinfo, buffer, 1); |
| convertLine(buffer[0], sizeof(JSAMPLE) * 3, out, |
| splash->imageFormat.depthBytes, cinfo->output_width, &srcFormat, |
| &splash->imageFormat, CVT_COPY, NULL, 0, NULL, |
| cinfo->output_scanline, 0); |
| } |
| jpeg_finish_decompress(cinfo); |
| |
| return 1; |
| } |
| |
| struct my_error_mgr |
| { |
| struct jpeg_error_mgr pub; /* "public" fields */ |
| jmp_buf setjmp_buffer; /* for return to caller */ |
| }; |
| |
| typedef struct my_error_mgr *my_error_ptr; |
| |
| static void |
| my_error_exit(j_common_ptr cinfo) |
| { |
| /* cinfo->err really points to a my_error_mgr struct, so coerce pointer */ |
| my_error_ptr myerr = (my_error_ptr) cinfo->err; |
| |
| /* Always display the message. */ |
| /* We could postpone this until after returning, if we chose. */ |
| (*cinfo->err->output_message) (cinfo); |
| |
| /* Return control to the setjmp point */ |
| longjmp(myerr->setjmp_buffer, 1); |
| } |
| |
| int |
| SplashDecodeJpegStream(Splash * splash, SplashStream * stream) |
| { |
| struct jpeg_decompress_struct cinfo; |
| int success; |
| struct my_error_mgr jerr; |
| |
| cinfo.err = jpeg_std_error(&jerr.pub); |
| jerr.pub.error_exit = my_error_exit; |
| |
| if (setjmp(jerr.setjmp_buffer)) { |
| success = 0; |
| goto done; |
| } |
| jpeg_create_decompress(&cinfo); |
| set_stream_src(&cinfo, stream); |
| success = SplashDecodeJpeg(splash, &cinfo); |
| |
| done: |
| jpeg_destroy_decompress(&cinfo); |
| return success; |
| } |