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/*
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* drawfile.c
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* Copyright (C) 2005 A.J. van Os; Released under GPL
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*
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* Description:
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* Functions to process with the Draw diagram
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*/
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#include <string.h>
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#include "DeskLib:Error.h"
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#include "DeskLib:SWI.h"
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#include "drawfile.h"
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#include "antiword.h"
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#define DRAWFILE_OBJECT_TOO_SMALL 200
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#define DRAWFILE_NO_TEXT 201
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#define DRAWFILE_BAD_CHARACTER 202
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#define DRAWFILE_SMALL_MEMORY 203
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#define DRAWFILE_PATH_WITHOUT_LINES 204
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#define DRAWFILE_BAD_PATH_TYPE 205
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#define DRAWFILE_PATH_WITHOUT_END 206
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#define DRAWFILE_BAD_SPRITE_SIZE 207
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#define DRAWFILE_BAD_JPEG_SIZE 208
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#define DRAWFILE_TOO_SMALL 209
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#define DRAWFILE_NOT_A_DRAWFILE 210
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#define DRAWFILE_OBJECT_SIZE 211
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#define DRAWFILE_MANY_FONTTABLES 212
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#define DRAWFILE_TEXT_NO_FONT 213
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#define DRAWFILE_OBJECT_UNEXPECTED 214
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#define DRAWFILE_SIZE_ERROR 215
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typedef struct drawfile_error_tag {
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int iErrorNumber;
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const char *szErrorText;
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} drawfile_error_type;
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static const drawfile_error_type atErrors[] = {
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{ DRAWFILE_OBJECT_TOO_SMALL, "Object too small"},
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{ DRAWFILE_NO_TEXT, "Text object without text"},
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{ DRAWFILE_BAD_CHARACTER, "Bad character in string"},
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{ DRAWFILE_SMALL_MEMORY, "Not enough memory reserved"},
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{ DRAWFILE_PATH_WITHOUT_LINES, "This path has no lines"},
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{ DRAWFILE_BAD_PATH_TYPE, "Bad path-type in path"},
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{ DRAWFILE_PATH_WITHOUT_END, "No end of path seen"},
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{ DRAWFILE_BAD_SPRITE_SIZE, "Bad sprite size"},
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{ DRAWFILE_BAD_JPEG_SIZE, "Bad jpeg size"},
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{ DRAWFILE_TOO_SMALL, "Too small to be a drawfile"},
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{ DRAWFILE_NOT_A_DRAWFILE, "Not a drawfile"},
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{ DRAWFILE_OBJECT_SIZE, "Object with incorrect size"},
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{ DRAWFILE_MANY_FONTTABLES, "More than one font table"},
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{ DRAWFILE_TEXT_NO_FONT, "Text, but no font table seen"},
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{ DRAWFILE_OBJECT_UNEXPECTED, "Unexpected object type"},
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{ DRAWFILE_SIZE_ERROR, "Sizes don't match"},
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};
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/*
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* pFillError - error number to error struct
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*/
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static os_error *
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pFillError(int iErrorNumber)
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{
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static os_error tError;
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const drawfile_error_type *pTmp;
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const char *szErrorText;
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szErrorText = "Unknown error";
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for (pTmp = atErrors; pTmp < atErrors + elementsof(atErrors); pTmp++) {
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if (iErrorNumber == pTmp->iErrorNumber) {
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szErrorText = pTmp->szErrorText;
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break;
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}
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}
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tError.errnum = iErrorNumber;
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strncpy(tError.errmess, szErrorText, sizeof(tError.errmess) - 1);
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tError.errmess[sizeof(tError.errmess) - 1] = '\0';
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DBG_DEC(tError.errnum);
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DBG_MSG(tError.errmess);
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return &tError;
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} /* end of pFillError */
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/*
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* Drawfile_BBox - Find the bounding box of a diagram
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*/
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os_error *
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Drawfile_Bbox(drawfile_bbox_flags flags,
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drawfile_diagram const *diagram,
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int size,
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os_trfm const *trfm,
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wimp_box *bbox)
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{
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return SWI(5, 0, DrawFile_BBox | XOS_Bit,
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flags, diagram, size, trfm, bbox);
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} /* end of Drawfile_Bbox */
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/*
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* Drawfile_CreateDiagram - create an empty drawfile diagram
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*/
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os_error *
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Drawfile_CreateDiagram(drawfile_info *pInfo, size_t tMemorySize,
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const char *szCreator, wimp_box tBbox)
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{
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drawfile_diagram *pDiag;
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if (tMemorySize < offsetof(drawfile_diagram, objects)) {
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return pFillError(DRAWFILE_SMALL_MEMORY);
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}
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pDiag = (drawfile_diagram *)pInfo->data;
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strncpy(pDiag->tag, "Draw", 4);
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pDiag->major_version = 201;
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pDiag->minor_version = 0;
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strncpy(pDiag->source, szCreator, sizeof(pDiag->source));
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pDiag->bbox = tBbox;
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/* Memory in use */
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pInfo->length = offsetof(drawfile_diagram, objects);
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return NULL;
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} /* end of Drawfile_CreateDiagram */
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/*
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* Drawfile_AppendObject - append an object to a diagram
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*/
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os_error *
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Drawfile_AppendObject(drawfile_info *pInfo, size_t tMemorySize,
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const drawfile_object *pObject, BOOL bRebind)
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{
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wimp_box *pMainBbox;
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const wimp_box *pBbox;
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byte *pAfter;
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if (tMemorySize < pInfo->length + pObject->size) {
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return pFillError(DRAWFILE_OBJECT_TOO_SMALL);
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}
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/* After the last object */
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pAfter = (byte *)pInfo->data + pInfo->length;
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/* Copy in the new data */
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memcpy(pAfter, pObject, pObject->size);
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/* Rebind if needed */
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if (bRebind) {
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pMainBbox = &((drawfile_diagram *)pInfo->data)->bbox;
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switch (pObject->type) {
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case drawfile_TYPE_FONT_TABLE:
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pBbox = NULL;
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break;
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case drawfile_TYPE_TEXT:
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pBbox = &pObject->data.text.bbox;
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break;
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case drawfile_TYPE_PATH:
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pBbox = &pObject->data.path.bbox;
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break;
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case drawfile_TYPE_SPRITE:
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pBbox = &pObject->data.sprite.bbox;
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break;
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case drawfile_TYPE_GROUP:
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pBbox = &pObject->data.group.bbox;
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break;
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case drawfile_TYPE_TAGGED:
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pBbox = &pObject->data.tagged.bbox;
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break;
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case drawfile_TYPE_TEXT_AREA:
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pBbox = &pObject->data.text_area.bbox;
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break;
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case drawfile_TYPE_TEXT_COLUMN:
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pBbox = NULL;
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break;
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case drawfile_TYPE_OPTIONS:
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pBbox = &pObject->data.options.bbox;
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break;
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case drawfile_TYPE_TRFM_TEXT:
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pBbox = &pObject->data.trfm_text.bbox;
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break;
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case drawfile_TYPE_TRFM_SPRITE:
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pBbox = &pObject->data.trfm_sprite.bbox;
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break;
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case drawfile_TYPE_JPEG:
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pBbox = &pObject->data.jpeg.bbox;
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break;
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default:
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pBbox = NULL;
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break;
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}
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if (pBbox != NULL) {
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if (pBbox->min.x < pMainBbox->min.x) {
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pMainBbox->min.x = pBbox->min.x;
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}
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if (pBbox->min.y < pMainBbox->min.y) {
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pMainBbox->min.y = pBbox->min.y;
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}
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if (pBbox->max.x > pMainBbox->max.x) {
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pMainBbox->max.x = pBbox->max.x;
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}
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if (pBbox->max.y > pMainBbox->max.y) {
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pMainBbox->max.y = pBbox->max.y;
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}
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}
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}
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/* Memory in use */
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pInfo->length += pObject->size;
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return NULL;
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} /* end of Drawfile_AppendObject */
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/*
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* Replaces the draw_render_diag function from RISC_OSLib
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*/
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os_error *
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Drawfile_RenderDiagram(drawfile_info *pInfo, window_redrawblock *pRedraw,
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double dScale)
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{
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int aiTransform[6];
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fail(pInfo == NULL);
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fail(pInfo->data == NULL);
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fail(pRedraw == NULL);
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fail(dScale < 0.01);
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aiTransform[0] = (int)(dScale * 0x10000);
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aiTransform[1] = 0;
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aiTransform[2] = 0;
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aiTransform[3] = (int)(dScale * 0x10000);
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aiTransform[4] = (pRedraw->rect.min.x - pRedraw->scroll.x) * 256;
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aiTransform[5] = (pRedraw->rect.max.y - pRedraw->scroll.y) * 256;
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return SWI(6, 0, DrawFile_Render | XOS_Bit,
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0, pInfo->data, pInfo->length, aiTransform, &pRedraw->rect, 0);
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} /* end of Drawfile_RenderDiagram */
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/*
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* pVerifyText - verify a text object
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*/
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static os_error *
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pVerifyText(const drawfile_text *pText)
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{
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const unsigned char *pucTmp;
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if (pText->text[0] == '\0') {
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return pFillError(DRAWFILE_NO_TEXT);
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}
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pucTmp = (const unsigned char *)pText->text;
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while (*pucTmp != '\0') {
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if (*pucTmp < 0x20 || *pucTmp == 0x7f) {
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return pFillError(DRAWFILE_BAD_CHARACTER);
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}
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pucTmp++;
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}
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return NULL;
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} /* end of pVerifyText */
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/*
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* pVerifyPath - verify a path object
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*/
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static os_error *
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pVerifyPath(const drawfile_path *pPath, int iSize)
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{
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const int *piTmp;
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int iElements;
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BOOL bLine;
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bLine = FALSE;
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iElements = (iSize - offsetof(drawfile_path, path)) / 4;
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for (piTmp = pPath->path; piTmp < pPath->path + iElements; piTmp++) {
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switch(*piTmp) {
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case drawfile_PATH_END_PATH:
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if (bLine) {
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return NULL;
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}
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return pFillError(DRAWFILE_PATH_WITHOUT_LINES);
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case drawfile_PATH_LINE_TO:
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bLine = TRUE;
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piTmp += 2;
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break;
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case drawfile_PATH_MOVE_TO:
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piTmp += 2;
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break;
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case drawfile_PATH_CLOSE_LINE:
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bLine = TRUE;
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break;
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default:
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return pFillError(DRAWFILE_BAD_PATH_TYPE);
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}
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}
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return pFillError(DRAWFILE_PATH_WITHOUT_END);
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} /* end of pVerifyPath */
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/*
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* pVerifySprite - verify a sprite object
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*/
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static os_error *
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pVerifySprite(const drawfile_sprite *pSprite, int iSize)
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{
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iSize -= offsetof(drawfile_sprite, header);
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if (iSize < pSprite->header.offset_next) {
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DBG_DEC(iSize);
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DBG_DEC(pSprite->header.offset_next);
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return pFillError(DRAWFILE_BAD_SPRITE_SIZE);
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}
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return NULL;
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} /* end of pVerifySprite */
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/*
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* pVerifyJpeg - verify a jpeg object
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*/
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static os_error *
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pVerifyJpeg(const drawfile_jpeg *pJpeg, int iSize)
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304 |
{
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iSize -= offsetof(drawfile_jpeg, data);
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306 |
if (iSize < pJpeg->len) {
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DBG_DEC(iSize);
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DBG_DEC(pJpeg->len);
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return pFillError(DRAWFILE_BAD_JPEG_SIZE);
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310 |
}
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return NULL;
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312 |
} /* end of pVerifyJpeg */
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313 |
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314 |
/*
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* Drawfile_VerifyDiagram - Verify the diagram generated from the Word file
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316 |
*
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317 |
* returns NULL if the diagram is correct
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318 |
*/
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319 |
os_error *
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320 |
Drawfile_VerifyDiagram(drawfile_info *pInfo)
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321 |
{
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drawfile_diagram *pDiag;
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drawfile_object *pObj;
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os_error *pError;
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const char *pcTmp;
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326 |
int iToGo, iFontTables;
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BOOL bTypeFontTable;
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328 |
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329 |
TRACE_MSG("Drawfile_VerifyDiagram");
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330 |
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fail(pInfo == NULL);
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333 |
if (pInfo->length < offsetof(drawfile_diagram, objects)) {
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return pFillError(DRAWFILE_TOO_SMALL);
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}
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336 |
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pDiag = (drawfile_diagram *)pInfo->data;
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338 |
if (strncmp(pDiag->tag, "Draw", 4) != 0 ||
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pDiag->major_version != 201 ||
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340 |
pDiag->minor_version != 0) {
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return pFillError(DRAWFILE_NOT_A_DRAWFILE);
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342 |
}
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343 |
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344 |
iToGo = pInfo->length - offsetof(drawfile_diagram, objects);
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345 |
pcTmp = (const char *)pInfo->data + offsetof(drawfile_diagram, objects);
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346 |
iFontTables = 0;
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347 |
bTypeFontTable = FALSE;
|
|
|
348 |
|
|
|
349 |
while (iToGo > 0) {
|
|
|
350 |
pObj = (drawfile_object *)pcTmp;
|
|
|
351 |
if (pObj->size < 0 || pObj->size % 4 != 0) {
|
|
|
352 |
return pFillError(DRAWFILE_OBJECT_SIZE);
|
|
|
353 |
}
|
|
|
354 |
switch (pObj->type) {
|
|
|
355 |
case drawfile_TYPE_FONT_TABLE:
|
|
|
356 |
if (bTypeFontTable) {
|
|
|
357 |
return pFillError(DRAWFILE_MANY_FONTTABLES);
|
|
|
358 |
}
|
|
|
359 |
bTypeFontTable = TRUE;
|
|
|
360 |
break;
|
|
|
361 |
case drawfile_TYPE_TEXT:
|
|
|
362 |
if (pObj->data.text.style.font_ref != 0 &&
|
|
|
363 |
!bTypeFontTable) {
|
|
|
364 |
return pFillError(DRAWFILE_TEXT_NO_FONT);
|
|
|
365 |
}
|
|
|
366 |
pError = pVerifyText(&pObj->data.text);
|
|
|
367 |
if (pError != NULL) {
|
|
|
368 |
return pError;
|
|
|
369 |
}
|
|
|
370 |
break;
|
|
|
371 |
case drawfile_TYPE_PATH:
|
|
|
372 |
pError = pVerifyPath(&pObj->data.path,
|
|
|
373 |
pObj->size - offsetof(drawfile_object, data));
|
|
|
374 |
if (pError != NULL) {
|
|
|
375 |
return pError;
|
|
|
376 |
}
|
|
|
377 |
break;
|
|
|
378 |
case drawfile_TYPE_SPRITE:
|
|
|
379 |
pError = pVerifySprite(&pObj->data.sprite,
|
|
|
380 |
pObj->size - offsetof(drawfile_object, data));
|
|
|
381 |
if (pError != NULL) {
|
|
|
382 |
return pError;
|
|
|
383 |
}
|
|
|
384 |
break;
|
|
|
385 |
case drawfile_TYPE_JPEG:
|
|
|
386 |
pError = pVerifyJpeg(&pObj->data.jpeg,
|
|
|
387 |
pObj->size - offsetof(drawfile_object, data));
|
|
|
388 |
if (pError != NULL) {
|
|
|
389 |
return pError;
|
|
|
390 |
}
|
|
|
391 |
break;
|
|
|
392 |
default:
|
|
|
393 |
DBG_DEC(pObj->type);
|
|
|
394 |
return pFillError(DRAWFILE_OBJECT_UNEXPECTED);
|
|
|
395 |
}
|
|
|
396 |
pcTmp += pObj->size;
|
|
|
397 |
iToGo -= pObj->size;
|
|
|
398 |
}
|
|
|
399 |
if (iToGo < 0) {
|
|
|
400 |
return pFillError(DRAWFILE_SIZE_ERROR);
|
|
|
401 |
}
|
|
|
402 |
return NULL;
|
|
|
403 |
} /* end of Drawfile_VerifyDiagram */
|
|
|
404 |
|
|
|
405 |
/*
|
|
|
406 |
* Drawfile_QueryBox - Find the bounding box of a diagram
|
|
|
407 |
*/
|
|
|
408 |
void
|
|
|
409 |
Drawfile_QueryBox(drawfile_info *pInfo, wimp_box *pRect, BOOL bScreenUnits)
|
|
|
410 |
{
|
|
|
411 |
fail(pInfo == NULL);
|
|
|
412 |
fail(pRect == NULL);
|
|
|
413 |
|
|
|
414 |
Error_CheckFatal(Drawfile_Bbox(0,
|
|
|
415 |
pInfo->data, pInfo->length, NULL, pRect));
|
|
|
416 |
if (bScreenUnits) {
|
|
|
417 |
pRect->min.x = Drawfile_DrawToScreen(pRect->min.x);
|
|
|
418 |
pRect->min.y = Drawfile_DrawToScreen(pRect->min.y);
|
|
|
419 |
pRect->max.x = Drawfile_DrawToScreen(pRect->max.x);
|
|
|
420 |
pRect->max.y = Drawfile_DrawToScreen(pRect->max.y);
|
|
|
421 |
}
|
|
|
422 |
} /* end of Drawfile_QueryBox */
|