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Diffstat (limited to 'image/mng.c')
| -rw-r--r-- | image/mng.c | 480 |
1 files changed, 480 insertions, 0 deletions
diff --git a/image/mng.c b/image/mng.c new file mode 100644 index 000000000..fecebe6f3 --- /dev/null +++ b/image/mng.c @@ -0,0 +1,480 @@ +/* + * This file is part of NetSurf, http://netsurf.sourceforge.net/ + * Licensed under the GNU General Public License, + * http://www.opensource.org/licenses/gpl-license + * Copyright 2004 Richard Wilson <not_ginger_matt@users.sourceforge.net> + */ + +/** \file + * Content for image/mng, image/png, and image/jng (implementation). + */ + +#include <assert.h> +#include <stdbool.h> +#include <string.h> +#include <stdlib.h> +#include <sys/time.h> +#include <time.h> +#include "libmng.h" +#include "netsurf/utils/config.h" +#include "netsurf/content/content.h" +#include "netsurf/desktop/browser.h" +#include "netsurf/image/bitmap.h" +#include "netsurf/image/mng.h" +#include "netsurf/utils/log.h" +#include "netsurf/utils/messages.h" +#include "netsurf/utils/utils.h" + +#ifdef WITH_MNG + +/* We do not currently support any form of colour/gamma correction, nor do + we support dynamic MNGs. +*/ + + +static mng_bool nsmng_openstream(mng_handle mng); +static mng_bool nsmng_readdata(mng_handle mng, mng_ptr buffer, mng_uint32 size, mng_uint32 *bytesread); +static mng_bool nsmng_closestream(mng_handle mng); +static mng_bool nsmng_processheader(mng_handle mng, mng_uint32 width, mng_uint32 height); +static mng_ptr nsmng_getcanvasline(mng_handle mng, mng_uint32 line); +static mng_uint32 nsmng_gettickcount(mng_handle mng); +static mng_bool nsmng_refresh(mng_handle mng, mng_uint32 x, mng_uint32 y, mng_uint32 w, mng_uint32 h); +static mng_bool nsmng_settimer(mng_handle mng, mng_uint32 msecs); +static void nsmng_animate(void *p); +static bool nsmng_broadcast_error(struct content *c); +static mng_bool nsmng_trace(mng_handle mng, mng_int32 iFunNr, mng_int32 iFuncseq, mng_pchar zFuncname); +static mng_bool nsmng_errorproc(mng_handle mng, mng_int32 code, + mng_int8 severity, mng_chunkid chunktype, mng_uint32 chunkseq, + mng_int32 extra1, mng_int32 extra2, mng_pchar text); +#ifndef MNG_INTERNAL_MEMMNGMT +static mng_ptr nsmng_alloc(mng_size_t n); +static void nsmng_free(mng_ptr p, mng_size_t n); +#endif + + +bool nsmng_create(struct content *c, const char *params[]) { + + /* Initialise the library + */ +#ifdef MNG_INTERNAL_MEMMNGMT + c->data.mng.handle = mng_initialize(c, MNG_NULL, MNG_NULL, MNG_NULL); +#else + c->data.mng.handle = mng_initialize(c, nsmng_alloc, nsmng_free, MNG_NULL); +#endif + if (c->data.mng.handle == MNG_NULL) { + LOG(("Unable to initialise MNG library.")); + return nsmng_broadcast_error(c); + } + + /* We need to decode in suspension mode + */ + if (mng_set_suspensionmode(c->data.mng.handle, MNG_TRUE) != MNG_NOERROR) { + LOG(("Unable to set suspension mode.")); + return nsmng_broadcast_error(c); + } + + /* We need to register our callbacks + */ + if (mng_setcb_openstream(c->data.mng.handle, nsmng_openstream) != MNG_NOERROR) { + LOG(("Unable to set openstream callback.")); + return nsmng_broadcast_error(c); + } + if (mng_setcb_readdata(c->data.mng.handle, nsmng_readdata) != MNG_NOERROR) { + LOG(("Unable to set readdata callback.")); + return nsmng_broadcast_error(c); + } + if (mng_setcb_closestream(c->data.mng.handle, nsmng_closestream) != MNG_NOERROR) { + LOG(("Unable to set closestream callback.")); + return nsmng_broadcast_error(c); + } + if (mng_setcb_processheader(c->data.mng.handle, nsmng_processheader) != MNG_NOERROR) { + LOG(("Unable to set processheader callback.")); + return nsmng_broadcast_error(c); + } + + /* Register our callbacks for displaying + */ + if (mng_setcb_getcanvasline(c->data.mng.handle, nsmng_getcanvasline) != MNG_NOERROR) { + LOG(("Unable to set getcanvasline callback.")); + return nsmng_broadcast_error(c); + } + if (mng_setcb_refresh(c->data.mng.handle, nsmng_refresh) != MNG_NOERROR) { + LOG(("Unable to set refresh callback.")); + return nsmng_broadcast_error(c); + } + if (mng_setcb_gettickcount(c->data.mng.handle, nsmng_gettickcount) != MNG_NOERROR) { + LOG(("Unable to set gettickcount callback.")); + return nsmng_broadcast_error(c); + } + if (mng_setcb_settimer(c->data.mng.handle, nsmng_settimer) != MNG_NOERROR) { + LOG(("Unable to set settimer callback.")); + return nsmng_broadcast_error(c); + } + + /* register error handling function */ + if (mng_setcb_errorproc(c->data.mng.handle, nsmng_errorproc) != MNG_NOERROR) { + LOG(("Unable to set errorproc")); + return nsmng_broadcast_error(c); + } + + /* Initialise the reading + */ + c->data.mng.read_start = true; + c->data.mng.read_resume = false; + c->data.mng.read_size = 0; + c->data.mng.waiting = false; + return true; +} + + +/* START OF CALLBACKS REQUIRED FOR READING +*/ + + +mng_bool nsmng_openstream(mng_handle mng) { + return MNG_TRUE; +} + +mng_bool nsmng_readdata(mng_handle mng, mng_ptr buffer, mng_uint32 size, mng_uint32 *bytesread) { + struct content *c; + + /* Get our content back + */ + c = (struct content *)mng_get_userdata(mng); + + /* Copy any data we have (maximum of 'size') + */ + *bytesread = ((c->source_size - c->data.mng.read_size) < size) ? + (c->source_size - c->data.mng.read_size) : size; + + LOG(("Read %d, processing %p", *bytesread, mng)); + + if ((*bytesread) > 0) { + memcpy(buffer, c->source_data + c->data.mng.read_size, *bytesread); + c->data.mng.read_size += *bytesread; + } + + /* Return success + */ + return MNG_TRUE; +} + +mng_bool nsmng_closestream(mng_handle mng) { + return MNG_TRUE; +} + +mng_bool nsmng_processheader(mng_handle mng, mng_uint32 width, mng_uint32 height) { + struct content *c; + union content_msg_data msg_data; + + /* This function is called when the header has been read and we know + the dimensions of the canvas. + */ + c = (struct content *)mng_get_userdata(mng); + c->bitmap = bitmap_create(width, height); + if (!c->bitmap) { + msg_data.error = messages_get("NoMemory"); + content_broadcast(c, CONTENT_MSG_ERROR, msg_data); + LOG(("Insufficient memory to create canvas.")); + return MNG_FALSE; + } + + /* Initialise the content size + */ + c->width = width; + c->height = height; + + /* Set the canvas style + */ + if (mng_set_canvasstyle(mng, MNG_CANVAS_RGBA8) != MNG_NOERROR) { + LOG(("Error setting canvas style.")); + } + + /* Return success + */ + return MNG_TRUE; +} + + +/* END OF CALLBACKS REQUIRED FOR READING +*/ + + +bool nsmng_process_data(struct content *c, char *data, unsigned int size) { + mng_retcode status; + + /* We only need to do any processing if we're starting/resuming reading. + */ + if ((!c->data.mng.read_resume) && (!c->data.mng.read_start)) return true; + + /* Try to start processing, or process some more data + */ + if (c->data.mng.read_start) { + status = mng_read(c->data.mng.handle); + c->data.mng.read_start = false; + } else { + status = mng_read_resume(c->data.mng.handle); + } + c->data.mng.read_resume = (status == MNG_NEEDMOREDATA); + if ((status != MNG_NOERROR) && (status != MNG_NEEDMOREDATA)) { + LOG(("Failed to start/continue reading (%i).", status)); + return nsmng_broadcast_error(c); + } + + /* Continue onwards + */ + return true; +} + + +bool nsmng_convert(struct content *c, int width, int height) { + mng_retcode status; + + LOG(("Converting")); + + /* Set the title + */ + c->title = malloc(100); + if (c->title) { + if (c->type == CONTENT_MNG) { + snprintf(c->title, 100, messages_get("MNGTitle"), + c->width, c->height, c->source_size); + } else if (c->type == CONTENT_PNG) { + snprintf(c->title, 100, messages_get("PNGTitle"), + c->width, c->height, c->source_size); + } else { + snprintf(c->title, 100, messages_get("JNGTitle"), + c->width, c->height, c->source_size); + } + } + c->size += c->width * c->height * 4 + 100; + c->status = CONTENT_STATUS_DONE; + + + /* Start displaying + */ + status = mng_display(c->data.mng.handle); + if ((status != MNG_NOERROR) && (status != MNG_NEEDTIMERWAIT)) { + LOG(("Unable to start display (%i)", status)); + return nsmng_broadcast_error(c); + } + return true; +} + + +/* START OF CALLBACKS REQUIRED FOR DISPLAYING +*/ + + +mng_ptr nsmng_getcanvasline(mng_handle mng, mng_uint32 line) { + struct content *c; + + /* Get our content back + */ + c = (struct content *)mng_get_userdata(mng); + + /* Calculate the address + */ + return bitmap_get_buffer(c->bitmap) + + bitmap_get_rowstride(c->bitmap) * line; +} + + +/** + * Get the wall-clock time in milliseconds since some fixed time. + */ + +mng_uint32 nsmng_gettickcount(mng_handle mng) { + static bool start = true; + static time_t t0; + struct timeval tv; + struct timezone tz; + + gettimeofday(&tv, &tz); + if (start) { + t0 = tv.tv_sec; + start = false; + } + + return (tv.tv_sec - t0) * 1000 + tv.tv_usec / 1000; +} + + +mng_bool nsmng_refresh(mng_handle mng, mng_uint32 x, mng_uint32 y, mng_uint32 w, mng_uint32 h) { + union content_msg_data data; + struct content *c; + + /* Get our content back + */ + c = (struct content *)mng_get_userdata(mng); + + /* Set the minimum redraw area + */ + data.redraw.x = x; + data.redraw.y = y; + data.redraw.width = w; + data.redraw.height = h; + + /* Set the redraw area to the whole canvas to ensure that if we can redraw something + to trigger animation later then we do + */ +/* data.redraw.x = 0; + data.redraw.y = 0; + data.redraw.width = c->width; + data.redraw.height = c->height; +*/ + /* Always redraw everything + */ + data.redraw.full_redraw = true; + + /* Set the object characteristics + */ + data.redraw.object = c; + data.redraw.object_x = 0; + data.redraw.object_y = 0; + data.redraw.object_width = c->width; + data.redraw.object_height = c->height; + + content_broadcast(c, CONTENT_MSG_REDRAW, data); + return MNG_TRUE; +} + +mng_bool nsmng_settimer(mng_handle mng, mng_uint32 msecs) { + struct content *c; + + /* Get our content back + */ + c = (struct content *)mng_get_userdata(mng); + + /* Perform the scheduling + */ + schedule(msecs / 10, nsmng_animate, c); + return MNG_TRUE; +} + + +/* END OF CALLBACKS REQUIRED FOR DISPLAYING +*/ + + +void nsmng_destroy(struct content *c) { + /* Cleanup the MNG structure and release the canvas memory + */ + schedule_remove(nsmng_animate, c); + mng_cleanup(&c->data.mng.handle); + if (c->bitmap) + bitmap_destroy(c->bitmap); + free(c->title); +} + + +bool nsmng_redraw(struct content *c, int x, int y, + int width, int height, + int clip_x0, int clip_y0, int clip_x1, int clip_y1, + float scale, unsigned long background_colour) +{ + bool ret; + + ret = bitmap_redraw(c, x, y, width, height, + clip_x0, clip_y0, clip_x1, clip_y1, + scale, background_colour); + + /* Check if we need to restart the animation + */ + if (c->data.mng.waiting) nsmng_animate(c); + + return ret; +} + +/** + * Animates to the next frame + */ +void nsmng_animate(void *p) { + struct content *c = p; + + /* If we used the last animation we advance, if not we try again later + */ + if (c->user_list->next == NULL) { + c->data.mng.waiting = true; + } else { + c->data.mng.waiting = false; + mng_display_resume(c->data.mng.handle); + } +} + + + +/** + * Broadcasts an error message and returns false + * + * \param c the content to broadcast for + * \return false + */ +bool nsmng_broadcast_error(struct content *c) { + union content_msg_data msg_data; + if (c->type == CONTENT_MNG) { + msg_data.error = messages_get("MNGError"); + } else if (c->type == CONTENT_PNG) { + msg_data.error = messages_get("PNGError"); + } else { + msg_data.error = messages_get("JNGError"); + } + content_broadcast(c, CONTENT_MSG_ERROR, msg_data); + return false; + +} + +mng_bool nsmng_trace(mng_handle mng, mng_int32 iFunNr, mng_int32 iFuncseq, mng_pchar zFuncname) +{ + LOG(("In %s(%d,%d), processing: %p", zFuncname, iFunNr, iFuncseq, mng)); + return MNG_TRUE; +} + +mng_bool nsmng_errorproc(mng_handle mng, mng_int32 code, + mng_int8 severity, + mng_chunkid chunktype, mng_uint32 chunkseq, + mng_int32 extra1, mng_int32 extra2, mng_pchar text) +{ + struct content *c; + char chunk[5]; + + c = (struct content *)mng_get_userdata(mng); + + chunk[0] = (char)((chunktype >> 24) & 0xFF); + chunk[1] = (char)((chunktype >> 16) & 0xFF); + chunk[2] = (char)((chunktype >> 8) & 0xFF); + chunk[3] = (char)((chunktype ) & 0xFF); + chunk[4] = '\0'; + + LOG(("error playing '%s' chunk %s (%d):", c->url, chunk, chunkseq)); + LOG(("code %d severity %d extra1 %d extra2 %d text:'%s'", code, + severity, extra1, extra2, text)); + + return (0); +} + + +#ifndef MNG_INTERNAL_MEMMNGMT + +/** + * Memory allocation callback for libmng. + */ + +mng_ptr nsmng_alloc(mng_size_t n) +{ + return calloc(1, n); +} + + +/** + * Memory free callback for libmng. + */ + +void nsmng_free(mng_ptr p, mng_size_t n) +{ + free(p); +} + +#endif + +#endif |