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tkImgPhoto.c
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tkImgPhoto.c
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/*
* tkImgPhoto.c --
*
* Implements images of type "photo" for Tk. Photo images are stored in
* full color (32 bits per pixel including alpha channel) and displayed
* using dithering if necessary.
*
* Copyright © 1994 The Australian National University.
* Copyright © 1994-1997 Sun Microsystems, Inc.
* Copyright © 2002-2003 Donal K. Fellows
* Copyright © 2003 ActiveState Corporation.
*
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* Author: Paul Mackerras (paulus@cs.anu.edu.au),
* Department of Computer Science,
* Australian National University.
*/
#include "tkImgPhoto.h"
/*
* The following data structure is used to return information from
* ParseSubcommandOptions:
*/
struct SubcommandOptions {
int options; /* Individual bits indicate which options were
* specified - see below. */
Tcl_Obj *name; /* Name specified without an option. */
int fromX, fromY; /* Values specified for -from option. */
int fromX2, fromY2; /* Second coordinate pair for -from option. */
int toX, toY; /* Values specified for -to option. */
int toX2, toY2; /* Second coordinate pair for -to option. */
int zoomX, zoomY; /* Values specified for -zoom option. */
int subsampleX, subsampleY; /* Values specified for -subsample option. */
Tcl_Obj *format; /* Value specified for -format option. */
XColor *background; /* Value specified for -background option. */
int compositingRule; /* Value specified for -compositingrule
* option. */
Tcl_Obj *metadata; /* Value specified for -metadata option. */
};
/*
* Bit definitions for use with ParseSubcommandOptions: each bit is set in the
* allowedOptions parameter on a call to ParseSubcommandOptions if that option
* is allowed for the current photo image subcommand. On return, the bit is
* set in the options field of the SubcommandOptions structure if that option
* was specified.
*
* OPT_ALPHA: Set if -alpha option allowed/specified.
* OPT_BACKGROUND: Set if -format option allowed/specified.
* OPT_COMPOSITE: Set if -compositingrule option allowed/spec'd.
* OPT_FORMAT: Set if -format option allowed/specified.
* OPT_FROM: Set if -from option allowed/specified.
* OPT_GRAYSCALE: Set if -grayscale option allowed/specified.
* OPT_METADATA: Set if -metadata option allowed/specified.
* OPT_SHRINK: Set if -shrink option allowed/specified.
* OPT_SUBSAMPLE: Set if -subsample option allowed/spec'd.
* OPT_TO: Set if -to option allowed/specified.
* OPT_WITHALPHA: Set if -withalpha option allowed/specified.
* OPT_ZOOM: Set if -zoom option allowed/specified.
*/
#define OPT_ALPHA 1
#define OPT_BACKGROUND 2
#define OPT_COMPOSITE 4
#define OPT_FORMAT 8
#define OPT_FROM 0x10
#define OPT_GRAYSCALE 0x20
#define OPT_METADATA 0x40
#define OPT_SHRINK 0x80
#define OPT_SUBSAMPLE 0x100
#define OPT_TO 0x200
#define OPT_WITHALPHA 0x400
#define OPT_ZOOM 0x800
/*
* List of option names. The order here must match the order of declarations
* of the OPT_* constants above.
*/
static const char *const optionNames[] = {
"-alpha",
"-background",
"-compositingrule",
"-format",
"-from",
"-grayscale",
"-metadata",
"-shrink",
"-subsample",
"-to",
"-withalpha",
"-zoom",
NULL
};
/*
* Message to generate when an attempt to resize an image fails due to memory
* problems.
*/
#define TK_PHOTO_ALLOC_FAILURE_MESSAGE \
"not enough free memory for image buffer"
/*
* Functions used in the type record for photo images.
*/
static int ImgPhotoCreate(Tcl_Interp *interp, const char *name,
Tcl_Size objc, Tcl_Obj *const objv[],
const Tk_ImageType *typePtr, Tk_ImageModel model,
void **clientDataPtr);
static void ImgPhotoDelete(void *clientData);
static int ImgPhotoPostscript(void *clientData,
Tcl_Interp *interp, Tk_Window tkwin,
Tk_PostscriptInfo psInfo, int x, int y, int width,
int height, int prepass);
/*
* The type record itself for photo images:
*/
Tk_ImageType tkPhotoImageType = {
"photo", /* name */
ImgPhotoCreate, /* createProc */
TkImgPhotoGet, /* getProc */
TkImgPhotoDisplay, /* displayProc */
TkImgPhotoFree, /* freeProc */
ImgPhotoDelete, /* deleteProc */
ImgPhotoPostscript, /* postscriptProc */
NULL, /* nextPtr */
NULL
};
typedef struct {
Tk_PhotoImageFormat *formatList;
/* Pointer to the first in the list of known
* photo image formats.*/
#if !defined(TK_NO_DEPRECATED) && TCL_MAJOR_VERSION < 9
Tk_PhotoImageFormat *oldFormatList;
/* Pointer to the first in the list of known
* photo image formats.*/
#endif
Tk_PhotoImageFormatVersion3 *formatListVersion3;
/* Pointer to the first in the list of known
* photo image formats in Version3 format.*/
int initialized; /* Set to 1 if we've initialized the
* structure. */
} ThreadSpecificData;
static Tcl_ThreadDataKey dataKey;
/*
* Default configuration
*/
#define DEF_PHOTO_GAMMA "1"
#define DEF_PHOTO_HEIGHT "0"
#define DEF_PHOTO_PALETTE ""
#define DEF_PHOTO_WIDTH "0"
/*
* Information used for parsing configuration specifications:
*/
static const Tk_ConfigSpec configSpecs[] = {
{TK_CONFIG_STRING, "-data", NULL, NULL,
NULL, TCL_INDEX_NONE, TK_CONFIG_NULL_OK, NULL},
{TK_CONFIG_STRING, "-file", NULL, NULL,
NULL, offsetof(PhotoModel, fileString), TK_CONFIG_NULL_OK, NULL},
{TK_CONFIG_STRING, "-format", NULL, NULL,
NULL, TCL_INDEX_NONE, TK_CONFIG_NULL_OK, NULL},
{TK_CONFIG_DOUBLE, "-gamma", NULL, NULL,
DEF_PHOTO_GAMMA, offsetof(PhotoModel, gamma), 0, NULL},
{TK_CONFIG_INT, "-height", NULL, NULL,
DEF_PHOTO_HEIGHT, offsetof(PhotoModel, userHeight), 0, NULL},
{TK_CONFIG_STRING, "-metadata", NULL, NULL,
NULL, TCL_INDEX_NONE, TK_CONFIG_NULL_OK, NULL},
{TK_CONFIG_UID, "-palette", NULL, NULL,
DEF_PHOTO_PALETTE, offsetof(PhotoModel, palette), 0, NULL},
{TK_CONFIG_INT, "-width", NULL, NULL,
DEF_PHOTO_WIDTH, offsetof(PhotoModel, userWidth), 0, NULL},
{TK_CONFIG_END, NULL, NULL, NULL, NULL, 0, 0, NULL}
};
/*
* Forward declarations
*/
static void PhotoFormatThreadExitProc(void *clientData);
static int ImgPhotoCmd(void *clientData, Tcl_Interp *interp,
int objc, Tcl_Obj *const objv[]);
static int ParseSubcommandOptions(
struct SubcommandOptions *optPtr,
Tcl_Interp *interp, int allowedOptions,
Tcl_Size *indexPtr, Tcl_Size objc, Tcl_Obj *const objv[]);
static void ImgPhotoCmdDeletedProc(void *clientData);
static int ImgPhotoConfigureModel(Tcl_Interp *interp,
PhotoModel *modelPtr, Tcl_Size objc,
Tcl_Obj *const objv[], int flags);
static int ToggleComplexAlphaIfNeeded(PhotoModel *mPtr);
static int ImgPhotoSetSize(PhotoModel *modelPtr, int width,
int height);
static char * ImgGetPhoto(PhotoModel *modelPtr,
Tk_PhotoImageBlock *blockPtr,
struct SubcommandOptions *optPtr);
static int MatchFileFormat(Tcl_Interp *interp, Tcl_Channel chan,
const char *fileName, Tcl_Obj *formatString,
Tcl_Obj *metadataInObj,
Tcl_Obj *metadataOutObj,
Tk_PhotoImageFormat **imageFormatPtr,
Tk_PhotoImageFormatVersion3 **imageFormatVersion3Ptr,
int *widthPtr, int *heightPtr, int *oldformat);
static int MatchStringFormat(Tcl_Interp *interp, Tcl_Obj *data,
Tcl_Obj *formatString,
Tcl_Obj *metadataInObj,
Tcl_Obj *metadataOutObj,
Tk_PhotoImageFormat **imageFormatPtr,
Tk_PhotoImageFormatVersion3 **imageFormatVersion3Ptr,
int *widthPtr, int *heightPtr, int *oldformat);
static const char * GetExtension(const char *path);
/*
*----------------------------------------------------------------------
*
* PhotoFormatThreadExitProc --
*
* Clean up the registered list of photo formats.
*
* Results:
* None.
*
* Side effects:
* The thread's linked lists of photo image formats is deleted.
*
*----------------------------------------------------------------------
*/
static void
PhotoFormatThreadExitProc(
TCL_UNUSED(void *)) /* not used */
{
Tk_PhotoImageFormat *freePtr;
Tk_PhotoImageFormatVersion3 *freePtrVersion3;
ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
#if !defined(TK_NO_DEPRECATED) && TCL_MAJOR_VERSION < 9
while (tsdPtr->oldFormatList != NULL) {
freePtr = tsdPtr->oldFormatList;
tsdPtr->oldFormatList = tsdPtr->oldFormatList->nextPtr;
ckfree(freePtr);
}
#endif
while (tsdPtr->formatList != NULL) {
freePtr = tsdPtr->formatList;
tsdPtr->formatList = tsdPtr->formatList->nextPtr;
ckfree((void *)freePtr->name);
ckfree(freePtr);
}
while (tsdPtr->formatListVersion3 != NULL) {
freePtrVersion3 = tsdPtr->formatListVersion3;
tsdPtr->formatListVersion3 = tsdPtr->formatListVersion3->nextPtr;
ckfree((void *)freePtrVersion3->name);
ckfree(freePtrVersion3);
}
}
/*
*----------------------------------------------------------------------
*
* Tk_CreateOldPhotoImageFormat, Tk_CreatePhotoImageFormat,
* Tk_CreatePhotoImageFormatVersion3 --
*
* This function is invoked by an image file handler to register a new
* photo image format and the functions that handle the new format. The
* function is typically invoked during Tcl_AppInit.
*
* Results:
* None.
*
* Side effects:
* The new image file format is entered into a table used in the photo
* image "read" and "write" subcommands.
*
*----------------------------------------------------------------------
*/
#if !defined(TK_NO_DEPRECATED) && TCL_MAJOR_VERSION < 9
void
Tk_CreateOldPhotoImageFormat(
const Tk_PhotoImageFormat *formatPtr)
/* Structure describing the format. All of the
* fields except "nextPtr" must be filled in
* by caller. */
{
Tk_PhotoImageFormat *copyPtr;
ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
if (!tsdPtr->initialized) {
tsdPtr->initialized = 1;
Tcl_CreateThreadExitHandler(PhotoFormatThreadExitProc, NULL);
}
copyPtr = (Tk_PhotoImageFormat *)ckalloc(sizeof(Tk_PhotoImageFormat));
*copyPtr = *formatPtr;
copyPtr->nextPtr = tsdPtr->oldFormatList;
tsdPtr->oldFormatList = copyPtr;
}
#endif
void
Tk_CreatePhotoImageFormat(
const Tk_PhotoImageFormat *formatPtr)
/* Structure describing the format. All of the
* fields except "nextPtr" must be filled in
* by caller. */
{
Tk_PhotoImageFormat *copyPtr;
ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
if (!tsdPtr->initialized) {
tsdPtr->initialized = 1;
Tcl_CreateThreadExitHandler(PhotoFormatThreadExitProc, NULL);
}
copyPtr = (Tk_PhotoImageFormat *)ckalloc(sizeof(Tk_PhotoImageFormat));
*copyPtr = *formatPtr;
#if !defined(TK_NO_DEPRECATED) && TCL_MAJOR_VERSION < 9
if (isupper((unsigned char) *formatPtr->name)) {
copyPtr->nextPtr = tsdPtr->oldFormatList;
tsdPtr->oldFormatList = copyPtr;
} else
#endif
{
/* for compatibility with aMSN: make a copy of formatPtr->name */
char *name = (char *)ckalloc(strlen(formatPtr->name) + 1);
strcpy(name, formatPtr->name);
copyPtr->name = name;
copyPtr->nextPtr = tsdPtr->formatList;
tsdPtr->formatList = copyPtr;
}
}
void
Tk_CreatePhotoImageFormatVersion3(
const Tk_PhotoImageFormatVersion3 *formatPtr)
/* Structure describing the format. All of the
* fields except "nextPtr" must be filled in
* by caller. */
{
Tk_PhotoImageFormatVersion3 *copyPtr;
char *name;
ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
if (!tsdPtr->initialized) {
tsdPtr->initialized = 1;
Tcl_CreateThreadExitHandler(PhotoFormatThreadExitProc, NULL);
}
copyPtr = (Tk_PhotoImageFormatVersion3 *)
ckalloc(sizeof(Tk_PhotoImageFormatVersion3));
*copyPtr = *formatPtr;
/* for compatibility with aMSN: make a copy of formatPtr->name */
name = (char *)ckalloc(strlen(formatPtr->name) + 1);
strcpy(name, formatPtr->name);
copyPtr->name = name;
copyPtr->nextPtr = tsdPtr->formatListVersion3;
tsdPtr->formatListVersion3 = copyPtr;
}
/*
*----------------------------------------------------------------------
*
* ImgPhotoCreate --
*
* This function is called by the Tk image code to create a new photo
* image.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* The data structure for a new photo image is allocated and initialized.
*
*----------------------------------------------------------------------
*/
static int
ImgPhotoCreate(
Tcl_Interp *interp, /* Interpreter for application containing
* image. */
const char *name, /* Name to use for image. */
Tcl_Size objc, /* Number of arguments. */
Tcl_Obj *const objv[], /* Argument objects for options (doesn't
* include image name or type). */
TCL_UNUSED(const Tk_ImageType *),/* Pointer to our type record (not used). */
Tk_ImageModel model, /* Token for image, to be used by us in later
* callbacks. */
void **clientDataPtr) /* Store manager's token for image here; it
* will be returned in later callbacks. */
{
PhotoModel *modelPtr;
/*
* Allocate and initialize the photo image model record.
*/
modelPtr = (PhotoModel *)ckalloc(sizeof(PhotoModel));
memset(modelPtr, 0, sizeof(PhotoModel));
modelPtr->tkModel = model;
modelPtr->interp = interp;
modelPtr->imageCmd = Tcl_CreateObjCommand(interp, name, ImgPhotoCmd,
modelPtr, ImgPhotoCmdDeletedProc);
modelPtr->palette = NULL;
modelPtr->pix32 = NULL;
modelPtr->instancePtr = NULL;
modelPtr->validRegion = TkCreateRegion();
/*
* Process configuration options given in the image create command.
*/
if (ImgPhotoConfigureModel(interp, modelPtr, objc, objv, 0) != TCL_OK) {
ImgPhotoDelete(modelPtr);
return TCL_ERROR;
}
*clientDataPtr = modelPtr;
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* ImgPhotoCmd --
*
* This function is invoked to process the Tcl command that corresponds
* to a photo image. See the user documentation for details on what it
* does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
static int
ImgPhotoCmd(
void *clientData, /* Information about photo model. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
static const char *const photoOptions[] = {
"blank", "cget", "configure", "copy", "data", "get", "put",
"read", "redither", "transparency", "write", NULL
};
enum PhotoOptions {
PHOTO_BLANK, PHOTO_CGET, PHOTO_CONFIGURE, PHOTO_COPY, PHOTO_DATA,
PHOTO_GET, PHOTO_PUT, PHOTO_READ, PHOTO_REDITHER, PHOTO_TRANS,
PHOTO_WRITE
};
PhotoModel *modelPtr = (PhotoModel *)clientData;
int result, x, y, width, height;
Tcl_Size index;
struct SubcommandOptions options;
unsigned char *pixelPtr;
Tk_PhotoImageBlock block;
Tk_PhotoImageFormat *imageFormat;
Tk_PhotoImageFormatVersion3 *imageFormatVersion3;
Tcl_Size length;
int imageWidth, imageHeight, matched, oldformat = 0;
Tcl_Channel chan;
Tk_PhotoHandle srcHandle;
ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
if (objc < 2) {
Tcl_WrongNumArgs(interp, 1, objv, "option ?arg ...?");
return TCL_ERROR;
}
if (Tcl_GetIndexFromObj(interp, objv[1], photoOptions, "option", 0,
&index) != TCL_OK) {
return TCL_ERROR;
}
switch ((enum PhotoOptions) index) {
case PHOTO_BLANK:
/*
* photo blank command - just call Tk_PhotoBlank.
*/
if (objc == 2) {
Tk_PhotoBlank(modelPtr);
return TCL_OK;
} else {
Tcl_WrongNumArgs(interp, 2, objv, NULL);
return TCL_ERROR;
}
case PHOTO_CGET: {
const char *arg;
if (objc != 3) {
Tcl_WrongNumArgs(interp, 2, objv, "option");
return TCL_ERROR;
}
arg = Tcl_GetStringFromObj(objv[2], &length);
if (strncmp(arg,"-data", length) == 0) {
if (modelPtr->dataString) {
Tcl_SetObjResult(interp, modelPtr->dataString);
}
} else if (strncmp(arg,"-format", length) == 0) {
if (modelPtr->format) {
Tcl_SetObjResult(interp, modelPtr->format);
}
} else if (strncmp(arg, "-metadata", length) == 0) {
if (modelPtr->metadata) {
Tcl_SetObjResult(interp, modelPtr->metadata);
}
} else {
Tk_ConfigureValue(interp, Tk_MainWindow(interp), configSpecs,
modelPtr, Tcl_GetString(objv[2]), 0);
}
return TCL_OK;
}
case PHOTO_CONFIGURE:
/*
* photo configure command - handle this in the standard way.
*/
if (objc == 2) {
Tcl_Obj *obj, *subobj;
result = Tk_ConfigureInfo(interp, Tk_MainWindow(interp),
configSpecs, modelPtr, NULL, 0);
if (result != TCL_OK) {
return result;
}
obj = Tcl_NewObj();
subobj = Tcl_NewStringObj("-data {} {} {}", 14);
if (modelPtr->dataString) {
Tcl_ListObjAppendElement(NULL, subobj, modelPtr->dataString);
} else {
Tcl_AppendStringsToObj(subobj, " {}", (char *)NULL);
}
Tcl_ListObjAppendElement(interp, obj, subobj);
subobj = Tcl_NewStringObj("-format {} {} {}", 16);
if (modelPtr->format) {
Tcl_ListObjAppendElement(NULL, subobj, modelPtr->format);
} else {
Tcl_AppendStringsToObj(subobj, " {}", (char *)NULL);
}
Tcl_ListObjAppendElement(interp, obj, subobj);
subobj = Tcl_NewStringObj("-metadata {} {} {}", 18);
if (modelPtr->metadata) {
Tcl_ListObjAppendElement(NULL, subobj, modelPtr->metadata);
} else {
Tcl_AppendStringsToObj(subobj, " {}", (char *)NULL);
}
Tcl_ListObjAppendElement(interp, obj, subobj);
Tcl_ListObjAppendList(interp, obj, Tcl_GetObjResult(interp));
Tcl_SetObjResult(interp, obj);
return TCL_OK;
} else if (objc == 3) {
const char *arg = Tcl_GetStringFromObj(objv[2], &length);
if (length > 1 && !strncmp(arg, "-data", length)) {
Tcl_AppendResult(interp, "-data {} {} {}", (char *)NULL);
if (modelPtr->dataString) {
/*
* TODO: Modifying result is bad!
*/
Tcl_ListObjAppendElement(NULL, Tcl_GetObjResult(interp),
modelPtr->dataString);
} else {
Tcl_AppendResult(interp, " {}", (char *)NULL);
}
return TCL_OK;
} else if (length > 1 &&
!strncmp(arg, "-format", length)) {
Tcl_AppendResult(interp, "-format {} {} {}", (char *)NULL);
if (modelPtr->format) {
/*
* TODO: Modifying result is bad!
*/
Tcl_ListObjAppendElement(NULL, Tcl_GetObjResult(interp),
modelPtr->format);
} else {
Tcl_AppendResult(interp, " {}", (char *)NULL);
}
return TCL_OK;
} else if (length > 1 &&
!strncmp(arg, "-metadata", length)) {
Tcl_AppendResult(interp, "-metadata {} {} {}", (char *)NULL);
if (modelPtr->metadata) {
/*
* TODO: Modifying result is bad!
*/
Tcl_ListObjAppendElement(NULL, Tcl_GetObjResult(interp),
modelPtr->metadata);
} else {
Tcl_AppendResult(interp, " {}", (char *)NULL);
}
return TCL_OK;
} else {
return Tk_ConfigureInfo(interp, Tk_MainWindow(interp),
configSpecs, modelPtr, arg, 0);
}
} else {
return ImgPhotoConfigureModel(interp, modelPtr, objc-2, objv+2,
TK_CONFIG_ARGV_ONLY);
}
case PHOTO_COPY:
/*
* photo copy command - first parse options.
*/
index = 2;
memset(&options, 0, sizeof(options));
options.zoomX = options.zoomY = 1;
options.subsampleX = options.subsampleY = 1;
options.name = NULL;
options.compositingRule = TK_PHOTO_COMPOSITE_OVERLAY;
if (ParseSubcommandOptions(&options, interp,
OPT_FROM | OPT_TO | OPT_ZOOM | OPT_SUBSAMPLE | OPT_SHRINK |
OPT_COMPOSITE, &index, objc, objv) != TCL_OK) {
return TCL_ERROR;
}
if (options.name == NULL || index < objc) {
Tcl_WrongNumArgs(interp, 2, objv,
"source-image ?-compositingrule rule? ?-from x1 y1 x2 y2? ?-to x1 y1 x2 y2? ?-zoom x y? ?-subsample x y?");
return TCL_ERROR;
}
/*
* Look for the source image and get a pointer to its image data.
* Check the values given for the -from option.
*/
srcHandle = Tk_FindPhoto(interp, Tcl_GetString(options.name));
if (srcHandle == NULL) {
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"image \"%s\" doesn't exist or is not a photo image",
Tcl_GetString(options.name)));
Tcl_SetErrorCode(interp, "TK", "LOOKUP", "PHOTO",
Tcl_GetString(options.name), (char *)NULL);
return TCL_ERROR;
}
Tk_PhotoGetImage(srcHandle, &block);
if ((options.fromX2 > block.width) || (options.fromY2 > block.height)
|| (options.fromX2 > block.width)
|| (options.fromY2 > block.height)) {
Tcl_SetObjResult(interp, Tcl_NewStringObj(
"coordinates for -from option extend outside source image",
-1));
Tcl_SetErrorCode(interp, "TK", "IMAGE", "PHOTO", "BAD_FROM", (char *)NULL);
return TCL_ERROR;
}
/*
* Hack to pass through the message that the place we're coming from
* has a simple alpha channel.
*/
if (!(((PhotoModel *) srcHandle)->flags & COMPLEX_ALPHA)) {
options.compositingRule |= SOURCE_IS_SIMPLE_ALPHA_PHOTO;
}
/*
* Fill in default values for unspecified parameters.
*/
if (!(options.options & OPT_FROM) || (options.fromX2 < 0)) {
options.fromX2 = block.width;
options.fromY2 = block.height;
}
if (!(options.options & OPT_TO) || (options.toX2 < 0)) {
width = options.fromX2 - options.fromX;
if (options.subsampleX > 0) {
width = (width + options.subsampleX - 1) / options.subsampleX;
} else if (options.subsampleX == 0) {
width = 0;
} else {
width = (width - options.subsampleX - 1) / -options.subsampleX;
}
options.toX2 = options.toX + width * options.zoomX;
height = options.fromY2 - options.fromY;
if (options.subsampleY > 0) {
height = (height + options.subsampleY - 1)
/ options.subsampleY;
} else if (options.subsampleY == 0) {
height = 0;
} else {
height = (height - options.subsampleY - 1)
/ -options.subsampleY;
}
options.toY2 = options.toY + height * options.zoomY;
}
/*
* Copy the image data over using Tk_PhotoPutZoomedBlock.
*/
if (block.pixelPtr) {
block.pixelPtr += options.fromX * block.pixelSize
+ options.fromY * block.pitch;
block.width = options.fromX2 - options.fromX;
block.height = options.fromY2 - options.fromY;
result = Tk_PhotoPutZoomedBlock(interp, (Tk_PhotoHandle) modelPtr,
&block, options.toX, options.toY, options.toX2 - options.toX,
options.toY2 - options.toY, options.zoomX, options.zoomY,
options.subsampleX, options.subsampleY,
options.compositingRule);
} else {
result = TCL_OK;
}
/*
* Set the destination image size if the -shrink option was specified.
* This has to be done _after_ copying the data. Otherwise, if source
* and destination are the same image, block.pixelPtr would point to
* an invalid memory block (bug [5239fd749b]).
*/
if (options.options & OPT_SHRINK) {
if (ImgPhotoSetSize(modelPtr, options.toX2,
options.toY2) != TCL_OK) {
Tcl_SetObjResult(interp, Tcl_NewStringObj(
TK_PHOTO_ALLOC_FAILURE_MESSAGE, TCL_INDEX_NONE));
Tcl_SetErrorCode(interp, "TK", "MALLOC", (char *)NULL);
return TCL_ERROR;
}
}
if (block.pixelPtr || (options.options & OPT_SHRINK)) {
Tk_ImageChanged(modelPtr->tkModel, 0, 0, 0, 0,
modelPtr->width, modelPtr->height);
}
return result;
case PHOTO_DATA: {
char *data = NULL;
Tcl_Obj *freeObj = NULL;
Tcl_Obj *metadataIn;
/*
* photo data command - first parse and check any options given.
*/
Tk_ImageStringWriteProc *stringWriteProc = NULL;
Tk_ImageStringWriteProcVersion3 *stringWriteProcVersion3 = NULL;
index = 1;
memset(&options, 0, sizeof(options));
options.name = NULL;
options.format = NULL;
options.metadata = NULL;
options.fromX = 0;
options.fromY = 0;
if (ParseSubcommandOptions(&options, interp,
OPT_FORMAT | OPT_FROM | OPT_GRAYSCALE | OPT_BACKGROUND
| OPT_METADATA,
&index, objc, objv) != TCL_OK) {
return TCL_ERROR;
}
if ((options.name == NULL) || (index < objc)) {
Tcl_WrongNumArgs(interp, 2, objv, "?-option value ...?");
if (options.background) {
Tk_FreeColor(options.background);
}
return TCL_ERROR;
}
if ((options.fromX > modelPtr->width)
|| (options.fromY > modelPtr->height)
|| (options.fromX2 > modelPtr->width)
|| (options.fromY2 > modelPtr->height)) {
Tcl_SetObjResult(interp, Tcl_NewStringObj(
"coordinates for -from option extend outside image", TCL_INDEX_NONE));
Tcl_SetErrorCode(interp, "TK", "IMAGE", "PHOTO", "BAD_FROM", (char *)NULL);
if (options.background) {
Tk_FreeColor(options.background);
}
return TCL_ERROR;
}
/*
* Fill in default values for unspecified parameters.
*/
if (!(options.options & OPT_FROM) || (options.fromX2 < 0)) {
options.fromX2 = modelPtr->width;
options.fromY2 = modelPtr->height;
}
if (!(options.options & OPT_FORMAT)) {
options.format = Tcl_NewStringObj("default", TCL_INDEX_NONE);
freeObj = options.format;
}
/*
* Use argument metadata if specified, otherwise the master metadata
*/
if (NULL != options.metadata) {
metadataIn = options.metadata;
} else {
metadataIn = modelPtr->metadata;
}
/*
* Search for an appropriate image string format handler.
*/
matched = 0;
for (imageFormat = tsdPtr->formatList; imageFormat != NULL;
imageFormat = imageFormat->nextPtr) {
if ((strncasecmp(Tcl_GetString(options.format),
imageFormat->name, strlen(imageFormat->name)) == 0)) {
matched = 1;
if (imageFormat->stringWriteProc != NULL) {
stringWriteProc = imageFormat->stringWriteProc;
break;
}
}
}
#if !defined(TK_NO_DEPRECATED) && TCL_MAJOR_VERSION < 9
if (stringWriteProc == NULL) {
oldformat = 1;
for (imageFormat = tsdPtr->oldFormatList; imageFormat != NULL;
imageFormat = imageFormat->nextPtr) {
if ((strncasecmp(Tcl_GetString(options.format),
imageFormat->name,
strlen(imageFormat->name)) == 0)) {
matched = 1;
if (imageFormat->stringWriteProc != NULL) {
stringWriteProc = imageFormat->stringWriteProc;
break;
}
}
}
}
#endif
if (stringWriteProc == NULL) {
oldformat = 0;
for (imageFormatVersion3 = tsdPtr->formatListVersion3;
imageFormatVersion3 != NULL;
imageFormatVersion3 = imageFormatVersion3->nextPtr) {
if ((strncasecmp(Tcl_GetString(options.format),
imageFormatVersion3->name,
strlen(imageFormatVersion3->name)) == 0)) {
matched = 1;
if (imageFormatVersion3->stringWriteProc != NULL) {
stringWriteProcVersion3 =
imageFormatVersion3->stringWriteProc;
break;
}
}
}
}
if (stringWriteProc == NULL && stringWriteProcVersion3 == NULL) {
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"image string format \"%s\" is %s",
Tcl_GetString(options.format),
(matched ? "not supported" : "unknown")));
Tcl_SetErrorCode(interp, "TK", "LOOKUP", "PHOTO_FORMAT",
Tcl_GetString(options.format), (char *)NULL);
goto dataErrorExit;
}
/*
* Call the handler's string write function to write out the image.
*/
data = ImgGetPhoto(modelPtr, &block, &options);
if (stringWriteProc == NULL) {
result = (stringWriteProcVersion3)(interp,
options.format, metadataIn, &block);
} else if (oldformat) {
Tcl_DString buffer;
typedef int (*OldStringWriteProc)(Tcl_Interp *interp,
Tcl_DString *dataPtr, const char *formatString,
Tk_PhotoImageBlock *blockPtr);
Tcl_DStringInit(&buffer);
result = ((OldStringWriteProc)(void *)stringWriteProc)(interp, &buffer,
Tcl_GetString(options.format), &block);
if (result == TCL_OK) {
Tcl_DStringResult(interp, &buffer);
} else {
Tcl_DStringFree(&buffer);
}
} else {
typedef int (*NewStringWriteProc)(Tcl_Interp *interp,
Tcl_Obj *formatString, Tk_PhotoImageBlock *blockPtr);
result = ((NewStringWriteProc)(void *)stringWriteProc)(interp,
options.format, &block);
}
if (options.background) {
Tk_FreeColor(options.background);
}
if (data) {
ckfree(data);
}
if (freeObj != NULL) {
Tcl_DecrRefCount(freeObj);
}
return result;
dataErrorExit:
if (options.background) {
Tk_FreeColor(options.background);
}
if (data) {
ckfree(data);
}
if (freeObj != NULL) {
Tcl_DecrRefCount(freeObj);
}
return TCL_ERROR;
}
case PHOTO_GET: {
/*
* photo get command - first parse and check parameters.
*/
Tcl_Obj *channels[4];
int i, channelCount = 3;
index = 3;
memset(&options, 0, sizeof(options));
options.name = NULL;
if (ParseSubcommandOptions(&options, interp, OPT_WITHALPHA,
&index, objc, objv) != TCL_OK) {
return TCL_ERROR;
}
if (options.name == NULL || index < objc) {
Tcl_WrongNumArgs(interp, 2, objv, "x y ?-withalpha?");
return TCL_ERROR;
}
if (options.options & OPT_WITHALPHA) {
channelCount = 4;
}
if ((Tcl_GetIntFromObj(interp, objv[2], &x) != TCL_OK)
|| (Tcl_GetIntFromObj(interp, objv[3], &y) != TCL_OK)) {
return TCL_ERROR;
}
if ((x < 0) || (x >= modelPtr->width)
|| (y < 0) || (y >= modelPtr->height)) {
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"%s get: coordinates out of range",
Tcl_GetString(objv[0])));
Tcl_SetErrorCode(interp, "TK", "IMAGE", "PHOTO", "COORDINATES",
(char *)NULL);
return TCL_ERROR;
}
/*
* Extract the value of the desired pixel and format it as a list.
*/
pixelPtr = modelPtr->pix32 + (y * modelPtr->width + x) * 4;
for (i = 0; i < channelCount; i++) {
channels[i] = Tcl_NewWideIntObj(pixelPtr[i]);
}
Tcl_SetObjResult(interp, Tcl_NewListObj(channelCount, channels));
return TCL_OK;
}
case PHOTO_PUT: {
Tcl_Obj *format, *data;
/*
* photo put command - first parse the options.
*/
index = 2;
memset(&options, 0, sizeof(options));
options.name = NULL;
options.format = NULL;
options.metadata = NULL;
if (ParseSubcommandOptions(&options, interp,
OPT_TO|OPT_FORMAT|OPT_METADATA,
&index, objc, objv) != TCL_OK) {