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- /*
- * drawfile.c
- * Copyright (C) 2005 A.J. van Os; Released under GPL
- *
- * Description:
- * Functions to process with the Draw diagram
- */
- #include <string.h>
- #include "DeskLib:Error.h"
- #include "DeskLib:SWI.h"
- #include "drawfile.h"
- #include "antiword.h"
- #define DRAWFILE_OBJECT_TOO_SMALL 200
- #define DRAWFILE_NO_TEXT 201
- #define DRAWFILE_BAD_CHARACTER 202
- #define DRAWFILE_SMALL_MEMORY 203
- #define DRAWFILE_PATH_WITHOUT_LINES 204
- #define DRAWFILE_BAD_PATH_TYPE 205
- #define DRAWFILE_PATH_WITHOUT_END 206
- #define DRAWFILE_BAD_SPRITE_SIZE 207
- #define DRAWFILE_BAD_JPEG_SIZE 208
- #define DRAWFILE_TOO_SMALL 209
- #define DRAWFILE_NOT_A_DRAWFILE 210
- #define DRAWFILE_OBJECT_SIZE 211
- #define DRAWFILE_MANY_FONTTABLES 212
- #define DRAWFILE_TEXT_NO_FONT 213
- #define DRAWFILE_OBJECT_UNEXPECTED 214
- #define DRAWFILE_SIZE_ERROR 215
- typedef struct drawfile_error_tag {
- int iErrorNumber;
- const char *szErrorText;
- } drawfile_error_type;
- static const drawfile_error_type atErrors[] = {
- { DRAWFILE_OBJECT_TOO_SMALL, "Object too small"},
- { DRAWFILE_NO_TEXT, "Text object without text"},
- { DRAWFILE_BAD_CHARACTER, "Bad character in string"},
- { DRAWFILE_SMALL_MEMORY, "Not enough memory reserved"},
- { DRAWFILE_PATH_WITHOUT_LINES, "This path has no lines"},
- { DRAWFILE_BAD_PATH_TYPE, "Bad path-type in path"},
- { DRAWFILE_PATH_WITHOUT_END, "No end of path seen"},
- { DRAWFILE_BAD_SPRITE_SIZE, "Bad sprite size"},
- { DRAWFILE_BAD_JPEG_SIZE, "Bad jpeg size"},
- { DRAWFILE_TOO_SMALL, "Too small to be a drawfile"},
- { DRAWFILE_NOT_A_DRAWFILE, "Not a drawfile"},
- { DRAWFILE_OBJECT_SIZE, "Object with incorrect size"},
- { DRAWFILE_MANY_FONTTABLES, "More than one font table"},
- { DRAWFILE_TEXT_NO_FONT, "Text, but no font table seen"},
- { DRAWFILE_OBJECT_UNEXPECTED, "Unexpected object type"},
- { DRAWFILE_SIZE_ERROR, "Sizes don't match"},
- };
- /*
- * pFillError - error number to error struct
- */
- static os_error *
- pFillError(int iErrorNumber)
- {
- static os_error tError;
- const drawfile_error_type *pTmp;
- const char *szErrorText;
- szErrorText = "Unknown error";
- for (pTmp = atErrors; pTmp < atErrors + elementsof(atErrors); pTmp++) {
- if (iErrorNumber == pTmp->iErrorNumber) {
- szErrorText = pTmp->szErrorText;
- break;
- }
- }
- tError.errnum = iErrorNumber;
- strncpy(tError.errmess, szErrorText, sizeof(tError.errmess) - 1);
- tError.errmess[sizeof(tError.errmess) - 1] = '\0';
- DBG_DEC(tError.errnum);
- DBG_MSG(tError.errmess);
- return &tError;
- } /* end of pFillError */
- /*
- * Drawfile_BBox - Find the bounding box of a diagram
- */
- os_error *
- Drawfile_Bbox(drawfile_bbox_flags flags,
- drawfile_diagram const *diagram,
- int size,
- os_trfm const *trfm,
- wimp_box *bbox)
- {
- return SWI(5, 0, DrawFile_BBox | XOS_Bit,
- flags, diagram, size, trfm, bbox);
- } /* end of Drawfile_Bbox */
- /*
- * Drawfile_CreateDiagram - create an empty drawfile diagram
- */
- os_error *
- Drawfile_CreateDiagram(drawfile_info *pInfo, size_t tMemorySize,
- const char *szCreator, wimp_box tBbox)
- {
- drawfile_diagram *pDiag;
- if (tMemorySize < offsetof(drawfile_diagram, objects)) {
- return pFillError(DRAWFILE_SMALL_MEMORY);
- }
- pDiag = (drawfile_diagram *)pInfo->data;
- strncpy(pDiag->tag, "Draw", 4);
- pDiag->major_version = 201;
- pDiag->minor_version = 0;
- strncpy(pDiag->source, szCreator, sizeof(pDiag->source));
- pDiag->bbox = tBbox;
- /* Memory in use */
- pInfo->length = offsetof(drawfile_diagram, objects);
- return NULL;
- } /* end of Drawfile_CreateDiagram */
- /*
- * Drawfile_AppendObject - append an object to a diagram
- */
- os_error *
- Drawfile_AppendObject(drawfile_info *pInfo, size_t tMemorySize,
- const drawfile_object *pObject, BOOL bRebind)
- {
- wimp_box *pMainBbox;
- const wimp_box *pBbox;
- byte *pAfter;
- if (tMemorySize < pInfo->length + pObject->size) {
- return pFillError(DRAWFILE_OBJECT_TOO_SMALL);
- }
- /* After the last object */
- pAfter = (byte *)pInfo->data + pInfo->length;
- /* Copy in the new data */
- memcpy(pAfter, pObject, pObject->size);
- /* Rebind if needed */
- if (bRebind) {
- pMainBbox = &((drawfile_diagram *)pInfo->data)->bbox;
- switch (pObject->type) {
- case drawfile_TYPE_FONT_TABLE:
- pBbox = NULL;
- break;
- case drawfile_TYPE_TEXT:
- pBbox = &pObject->data.text.bbox;
- break;
- case drawfile_TYPE_PATH:
- pBbox = &pObject->data.path.bbox;
- break;
- case drawfile_TYPE_SPRITE:
- pBbox = &pObject->data.sprite.bbox;
- break;
- case drawfile_TYPE_GROUP:
- pBbox = &pObject->data.group.bbox;
- break;
- case drawfile_TYPE_TAGGED:
- pBbox = &pObject->data.tagged.bbox;
- break;
- case drawfile_TYPE_TEXT_AREA:
- pBbox = &pObject->data.text_area.bbox;
- break;
- case drawfile_TYPE_TEXT_COLUMN:
- pBbox = NULL;
- break;
- case drawfile_TYPE_OPTIONS:
- pBbox = &pObject->data.options.bbox;
- break;
- case drawfile_TYPE_TRFM_TEXT:
- pBbox = &pObject->data.trfm_text.bbox;
- break;
- case drawfile_TYPE_TRFM_SPRITE:
- pBbox = &pObject->data.trfm_sprite.bbox;
- break;
- case drawfile_TYPE_JPEG:
- pBbox = &pObject->data.jpeg.bbox;
- break;
- default:
- pBbox = NULL;
- break;
- }
- if (pBbox != NULL) {
- if (pBbox->min.x < pMainBbox->min.x) {
- pMainBbox->min.x = pBbox->min.x;
- }
- if (pBbox->min.y < pMainBbox->min.y) {
- pMainBbox->min.y = pBbox->min.y;
- }
- if (pBbox->max.x > pMainBbox->max.x) {
- pMainBbox->max.x = pBbox->max.x;
- }
- if (pBbox->max.y > pMainBbox->max.y) {
- pMainBbox->max.y = pBbox->max.y;
- }
- }
- }
- /* Memory in use */
- pInfo->length += pObject->size;
- return NULL;
- } /* end of Drawfile_AppendObject */
- /*
- * Replaces the draw_render_diag function from RISC_OSLib
- */
- os_error *
- Drawfile_RenderDiagram(drawfile_info *pInfo, window_redrawblock *pRedraw,
- double dScale)
- {
- int aiTransform[6];
- fail(pInfo == NULL);
- fail(pInfo->data == NULL);
- fail(pRedraw == NULL);
- fail(dScale < 0.01);
- aiTransform[0] = (int)(dScale * 0x10000);
- aiTransform[1] = 0;
- aiTransform[2] = 0;
- aiTransform[3] = (int)(dScale * 0x10000);
- aiTransform[4] = (pRedraw->rect.min.x - pRedraw->scroll.x) * 256;
- aiTransform[5] = (pRedraw->rect.max.y - pRedraw->scroll.y) * 256;
- return SWI(6, 0, DrawFile_Render | XOS_Bit,
- 0, pInfo->data, pInfo->length, aiTransform, &pRedraw->rect, 0);
- } /* end of Drawfile_RenderDiagram */
- /*
- * pVerifyText - verify a text object
- */
- static os_error *
- pVerifyText(const drawfile_text *pText)
- {
- const unsigned char *pucTmp;
- if (pText->text[0] == '\0') {
- return pFillError(DRAWFILE_NO_TEXT);
- }
- pucTmp = (const unsigned char *)pText->text;
- while (*pucTmp != '\0') {
- if (*pucTmp < 0x20 || *pucTmp == 0x7f) {
- return pFillError(DRAWFILE_BAD_CHARACTER);
- }
- pucTmp++;
- }
- return NULL;
- } /* end of pVerifyText */
- /*
- * pVerifyPath - verify a path object
- */
- static os_error *
- pVerifyPath(const drawfile_path *pPath, int iSize)
- {
- const int *piTmp;
- int iElements;
- BOOL bLine;
- bLine = FALSE;
- iElements = (iSize - offsetof(drawfile_path, path)) / 4;
- for (piTmp = pPath->path; piTmp < pPath->path + iElements; piTmp++) {
- switch(*piTmp) {
- case drawfile_PATH_END_PATH:
- if (bLine) {
- return NULL;
- }
- return pFillError(DRAWFILE_PATH_WITHOUT_LINES);
- case drawfile_PATH_LINE_TO:
- bLine = TRUE;
- piTmp += 2;
- break;
- case drawfile_PATH_MOVE_TO:
- piTmp += 2;
- break;
- case drawfile_PATH_CLOSE_LINE:
- bLine = TRUE;
- break;
- default:
- return pFillError(DRAWFILE_BAD_PATH_TYPE);
- }
- }
- return pFillError(DRAWFILE_PATH_WITHOUT_END);
- } /* end of pVerifyPath */
- /*
- * pVerifySprite - verify a sprite object
- */
- static os_error *
- pVerifySprite(const drawfile_sprite *pSprite, int iSize)
- {
- iSize -= offsetof(drawfile_sprite, header);
- if (iSize < pSprite->header.offset_next) {
- DBG_DEC(iSize);
- DBG_DEC(pSprite->header.offset_next);
- return pFillError(DRAWFILE_BAD_SPRITE_SIZE);
- }
- return NULL;
- } /* end of pVerifySprite */
- /*
- * pVerifyJpeg - verify a jpeg object
- */
- static os_error *
- pVerifyJpeg(const drawfile_jpeg *pJpeg, int iSize)
- {
- iSize -= offsetof(drawfile_jpeg, data);
- if (iSize < pJpeg->len) {
- DBG_DEC(iSize);
- DBG_DEC(pJpeg->len);
- return pFillError(DRAWFILE_BAD_JPEG_SIZE);
- }
- return NULL;
- } /* end of pVerifyJpeg */
- /*
- * Drawfile_VerifyDiagram - Verify the diagram generated from the Word file
- *
- * returns NULL if the diagram is correct
- */
- os_error *
- Drawfile_VerifyDiagram(drawfile_info *pInfo)
- {
- drawfile_diagram *pDiag;
- drawfile_object *pObj;
- os_error *pError;
- const char *pcTmp;
- int iToGo, iFontTables;
- BOOL bTypeFontTable;
- TRACE_MSG("Drawfile_VerifyDiagram");
- fail(pInfo == NULL);
- if (pInfo->length < offsetof(drawfile_diagram, objects)) {
- return pFillError(DRAWFILE_TOO_SMALL);
- }
- pDiag = (drawfile_diagram *)pInfo->data;
- if (strncmp(pDiag->tag, "Draw", 4) != 0 ||
- pDiag->major_version != 201 ||
- pDiag->minor_version != 0) {
- return pFillError(DRAWFILE_NOT_A_DRAWFILE);
- }
- iToGo = pInfo->length - offsetof(drawfile_diagram, objects);
- pcTmp = (const char *)pInfo->data + offsetof(drawfile_diagram, objects);
- iFontTables = 0;
- bTypeFontTable = FALSE;
- while (iToGo > 0) {
- pObj = (drawfile_object *)pcTmp;
- if (pObj->size < 0 || pObj->size % 4 != 0) {
- return pFillError(DRAWFILE_OBJECT_SIZE);
- }
- switch (pObj->type) {
- case drawfile_TYPE_FONT_TABLE:
- if (bTypeFontTable) {
- return pFillError(DRAWFILE_MANY_FONTTABLES);
- }
- bTypeFontTable = TRUE;
- break;
- case drawfile_TYPE_TEXT:
- if (pObj->data.text.style.font_ref != 0 &&
- !bTypeFontTable) {
- return pFillError(DRAWFILE_TEXT_NO_FONT);
- }
- pError = pVerifyText(&pObj->data.text);
- if (pError != NULL) {
- return pError;
- }
- break;
- case drawfile_TYPE_PATH:
- pError = pVerifyPath(&pObj->data.path,
- pObj->size - offsetof(drawfile_object, data));
- if (pError != NULL) {
- return pError;
- }
- break;
- case drawfile_TYPE_SPRITE:
- pError = pVerifySprite(&pObj->data.sprite,
- pObj->size - offsetof(drawfile_object, data));
- if (pError != NULL) {
- return pError;
- }
- break;
- case drawfile_TYPE_JPEG:
- pError = pVerifyJpeg(&pObj->data.jpeg,
- pObj->size - offsetof(drawfile_object, data));
- if (pError != NULL) {
- return pError;
- }
- break;
- default:
- DBG_DEC(pObj->type);
- return pFillError(DRAWFILE_OBJECT_UNEXPECTED);
- }
- pcTmp += pObj->size;
- iToGo -= pObj->size;
- }
- if (iToGo < 0) {
- return pFillError(DRAWFILE_SIZE_ERROR);
- }
- return NULL;
- } /* end of Drawfile_VerifyDiagram */
- /*
- * Drawfile_QueryBox - Find the bounding box of a diagram
- */
- void
- Drawfile_QueryBox(drawfile_info *pInfo, wimp_box *pRect, BOOL bScreenUnits)
- {
- fail(pInfo == NULL);
- fail(pRect == NULL);
- Error_CheckFatal(Drawfile_Bbox(0,
- pInfo->data, pInfo->length, NULL, pRect));
- if (bScreenUnits) {
- pRect->min.x = Drawfile_DrawToScreen(pRect->min.x);
- pRect->min.y = Drawfile_DrawToScreen(pRect->min.y);
- pRect->max.x = Drawfile_DrawToScreen(pRect->max.x);
- pRect->max.y = Drawfile_DrawToScreen(pRect->max.y);
- }
- } /* end of Drawfile_QueryBox */
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