ref: 9ced712a2ad70557a8ceb89ff3b969b92c85f68c
dir: /sys/src/cmd/aux/antiword/drawfile.c/
/*
* 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 */