Initial import of the CDE 2.1.30 sources from the Open Group.

cde/lib/DtHelp/GraphicsP.h

@@ -0,0 +1,175 @@
+/* $XConsortium: GraphicsP.h /main/4 1996/05/09 03:43:09 drk $ */
+#ifndef _DtGraphicsP_h
+#define _DtGraphicsP_h
+
+#include <stdio.h>
+#include <X11/Intrinsic.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+/* 
+ * Input stream data structures
+ */
+
+/* Stream source types */ 
+enum _DtGrStreamType { _DtGrNONE, _DtGrBUFFER, _DtGrFILE };
+
+/* Stream file data */
+typedef struct
+{
+    FILE *fileptr;
+    char *filename;
+    char *uncompressed_filename;
+} _DtGrFile;
+
+/* Stream buffer data */
+typedef struct
+{
+    const char *base;
+    long       size;
+    char       *current;
+    char       *end;
+} _DtGrBuffer;
+
+/* Stream data */
+typedef struct
+{
+    enum _DtGrStreamType  type;
+    union
+    {
+	_DtGrFile    file;
+	_DtGrBuffer  buffer;
+    } source;
+} _DtGrStream;
+
+/*
+ * Input stream function prototypes
+ */
+
+/* Open a file stream */
+int _DtGrOpenFile(
+    _DtGrStream *stream,
+    const char  *path
+);
+
+/* Open a buffer stream */
+int _DtGrOpenBuffer(
+    _DtGrStream *stream,
+    const char  *buffer,
+    int         buffer_size
+);
+
+/* Close a stream */
+int _DtGrCloseStream(
+    _DtGrStream *stream
+);
+
+/* Reads data from a stream into a buffer */
+size_t _DtGrRead(
+    void        *buffer,
+    size_t      size,
+    size_t      num_items,
+    _DtGrStream *stream
+);
+
+/* Sets the position of the next input operation on a stream */
+int _DtGrSeek(
+    _DtGrStream *stream,
+    long        offset,
+    int         whence
+);
+
+/* Reads a character from a stream and advances the stream position */
+int _DtGrGetChar(
+    _DtGrStream *stream
+);
+
+/* Reads a string from a stream and advances the stream position */
+char *_DtGrGetString(
+    char        *buffer,
+    int         num_bytes,
+    _DtGrStream *stream
+);
+
+/*
+ * Inline graphics data structures
+ */
+
+enum _DtGrColorModel { _DtGrCOLOR, _DtGrGRAY_SCALE, _DtGrBITONAL };
+enum _DtGrLoadStatus { _DtGrSUCCESS, _DtGrCOLOR_REDUCE,_DtGrCONVERT_FAILURE, 
+                       _DtGrOPEN_FAILED, _DtGrFILE_INVALID, _DtGrNO_MEMORY, 
+                       _DtGrCOLOR_FAILED };
+
+/* Context structure used by image type converters */
+typedef struct {
+    char *image_type;
+    XPointer context;
+} _DtGrContext;
+
+typedef enum _DtGrLoadStatus (*_DtGrLoadProc)(
+    _DtGrStream           *stream,
+    Screen                *screen,
+    int                   depth,
+    Colormap              colormap,
+    Visual                *visual,
+    Pixel                 foreground,
+    Pixel                 background,
+    GC                    gc,
+    enum _DtGrColorModel  color_model,
+    Boolean               allow_reduced_colors,
+    Dimension             *in_out_width,
+    Dimension             *in_out_height,
+    unsigned short        media_resolution,
+    Pixmap                *ret_pixmap,
+    Pixmap                *ret_mask,
+    Pixel                 **ret_colors,
+    int                   *ret_num_colors,
+    _DtGrContext          *context);
+
+typedef void (*_DtGrDestroyContextProc)(
+    _DtGrContext *context);
+
+/*
+ * Inline graphics function prototypes
+ */
+
+/* Loads an image into a pixmap */
+enum _DtGrLoadStatus _DtGrLoad(
+    _DtGrStream           *stream,
+    char                  **image_type,
+    Screen                *screen,
+    int                   depth,
+    Colormap              colormap,
+    Visual                *visual,
+    Pixel                 foreground,
+    Pixel                 background,
+    GC                    gc,
+    enum _DtGrColorModel  color_model,
+    Boolean               allow_reduced_colors,
+    Dimension             *in_out_width,
+    Dimension             *in_out_height,
+    unsigned short        media_resolution,
+    Pixmap                *ret_pixmap,
+    Pixmap                *ret_mask,
+    Pixel                 **ret_colors,
+    int                   *ret_num_colors,
+    _DtGrContext          *context);
+
+/* Destroys a context */
+void _DtGrDestroyContext(
+    _DtGrContext *context);
+
+/* Registers a converter for a graphic type */
+void _DtGrRegisterConverter(
+    char                    *image_type,
+    _DtGrLoadProc           convert_proc,
+    _DtGrDestroyContextProc destroy_context_proc,
+    _DtGrLoadProc           *current_convert_proc,
+    _DtGrDestroyContextProc *current_destroy_proc);
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* _DtGraphicsP_h */
+/* DON'T ADD ANYTHING AFTER THIS #endif */