| Imager::APIRef(3pm) | User Contributed Perl Documentation | Imager::APIRef(3pm) |
Imager::APIRef - Imager's C API - reference.
i_color color;
color.rgba.r = 255; color.rgba.g = 0; color.rgba.b = 255;
double x[] = { ... };
double y[] = { ... };
i_polygon_t poly;
poly.count = sizeof(x) / sizeof(*x);
poly.x = x;
poly.y = y;
# Blit tools
# Data Types
i_img *img;
i_color black;
black.rgba.r = black.rgba.g = black.rgba.b = black.rgba.a = 0;
i_fill_t *fill;
i_img_dim x, y;
i_img_dim_u limit;
printf("left %" i_DF "\n", i_DFc(x));
printf("point (" i_DFp ")\n", i_DFcp(x, y));
# Drawing
i_arc(im, 50, 50, 20, 45, 135, &color);
i_arc_cfill(im, 50, 50, 35, 90, 135, fill);
i_arc_aa(im, 50, 50, 35, 90, 135, &color);
i_arc_aa_cfill(im, 50, 50, 35, 90, 135, fill);
i_circle_aa(im, 50, 50, 45, &color);
i_box(im, 0, 0, im->xsize-1, im->ysize-1, &color).
i_box_filled(im, 0, 0, im->xsize-1, im->ysize-1, &color);
i_box_cfill(im, 0, 0, im->xsize-1, im->ysize-1, fill);
i_flood_fill(im, 50, 50, &color);
i_flood_cfill(im, 50, 50, fill);
i_flood_fill_border(im, 50, 50, &color, &border);
i_flood_cfill_border(im, 50, 50, fill, border);
i_poly_poly_aa(im, 1, &poly, mode, color);
i_poly_aa_m(im, count, x, y, mode, color);
i_poly_poly_aa_cfill(im, 1, &poly, mode, fill);
i_poly_aa_cfill(im, count, x, y, mode, fill);
# Error handling
im_clear_error(aIMCTX);
i_clear_error();
i_push_error(0, "Yep, it's broken");
i_push_error(errno, "Error writing");
im_push_error(aIMCTX, 0, "Something is wrong");
va_args args;
va_start(args, lastarg);
im_push_errorvf(ctx, code, format, args);
i_push_errorf(errno, "Cannot open file %s: %d", filename, errno);
im_push_errorf(aIMCTX, errno, "Cannot open file %s: %d", filename, errno);
# Files
im_set_image_file_limits(aIMCTX, 500, 500, 1000000);
i_set_image_file_limits(500, 500, 1000000);
im_get_image_file_limits(aIMCTX, &width, &height, &bytes)
i_get_image_file_limits(&width, &height, &bytes)
im_int_check_image_file_limits(aIMCTX, width, height, channels, sizeof(i_sample_t))
i_int_check_image_file_limits(width, height, channels, sizeof(i_sample_t))
# Fills
i_fill_t *fill = i_new_fill_solidf(&fcolor, combine);
i_fill_t *fill = i_new_fill_solid(&color, combine);
i_fill_t *fill = i_new_fill_hatch(&fg_color, &bg_color, combine, hatch, custom_hatch, dx, dy);
i_fill_t *fill = i_new_fill_hatchf(&fg_fcolor, &bg_fcolor, combine, hatch, custom_hatch, dx, dy);
i_fill_t *fill = i_new_fill_image(src_img, matrix, x_offset, y_offset, combine);
fill = i_new_fill_fount(0, 0, 100, 100, i_ft_linear, i_ft_linear,
i_fr_triangle, 0, i_fts_grid, 9, 1, segs);
i_fill_destroy(fill);
# I/O Layers
ssize_t count = i_io_peekn(ig, buffer, sizeof(buffer));
ssize_t result = i_io_write(io, buffer, size)
char buffer[BUFSIZ]
ssize_t len = i_io_gets(buffer, sizeof(buffer), '\n');
io_glue_destroy(ig);
# Image
# Image creation/destruction
i_img *img = i_sametype(src, width, height);
i_img *img = i_sametype_chans(src, width, height, channels);
i_img *img = im_img_16_new(aIMCTX, width, height, channels);
i_img *img = i_img_16_new(width, height, channels);
i_img *img = im_img_8_new(aIMCTX, width, height, channels);
i_img *img = i_img_8_new(width, height, channels);
i_img *img = im_img_double_new(aIMCTX, width, height, channels);
i_img *img = i_img_double_new(width, height, channels);
i_img *img = im_img_pal_new(aIMCTX, width, height, channels, max_palette_size)
i_img *img = i_img_pal_new(width, height, channels, max_palette_size)
i_img_destroy(img)
# Image Implementation
i_img *im = im_img_alloc(aIMCTX);
i_img *im = i_img_alloc();
im_img_init(aIMCTX, im);
i_img_init(im);
# Image Information
// only channel 0 writable
i_img_setmask(img, 0x01);
int mask = i_img_getmask(img);
int channels = i_img_getchannels(img);
i_img_dim width = i_img_get_width(im);
i_img_dim height = i_img_get_height(im);
i_color_model_t cm = i_img_color_model(im);
int alpha_channel;
int has_alpha = i_img_alpha_channel(im, &alpha_channel);
int color_channels = i_img_color_channels(im);
# Image quantization
# Logging
# mutex
i_mutex_t mutex;
# Mutex functions
i_mutex_t m = i_mutex_new();
i_mutex_destroy(m);
i_mutex_lock(m);
i_mutex_unlock(m);
# Paletted images
# Tags
i_tags_set(&img->tags, "i_comment", -1);
i_tags_setn(&img->tags, "i_xres", 204);
i_tags_setn(&img->tags, "i_yres", 196);
Renders in normal combine mode.
i_img *img;
This is Imager's image type.
It contains the following members:
i_color black;
black.rgba.r = black.rgba.g = black.rgba.b = black.rgba.a = 0;
Type for 8-bit/sample color.
Samples as per;
i_color c;
i_color is a union of:
Its layout exactly corresponds to i_color.
i_fill_t *fill;
This is the "abstract" base type for Imager's fill types.
Unless you're implementing a new fill type you'll typically treat this as an opaque type.
i_img_dim x, y;
A signed integer type that represents an image dimension or ordinate.
May be larger than int on some platforms.
i_img_dim_u limit;
An unsigned variant of "i_img_dim".
An enumerated type with the following possible values:
printf("left %" i_DF "\n", i_DFc(x));
This is a constant string that can be used with functions like printf() to format i_img_dim values after they're been cast with i_DFc().
Does not include the leading "%".
printf("point (" i_DFp ")\n", i_DFcp(x, y));
Format a pair of "i_img_dim" values. This format string does include the leading "%".
i_arc(im, 50, 50, 20, 45, 135, &color);
Fills an arc centered at (x,y) with radius rad covering the range of angles in degrees from d1 to d2, with the color.
i_arc_aa(im, 50, 50, 35, 90, 135, &color);
Anti-alias fills an arc centered at (x,y) with radius rad covering the range of angles in degrees from d1 to d2, with the color.
i_arc_aa_cfill(im, 50, 50, 35, 90, 135, fill);
Anti-alias fills an arc centered at (x,y) with radius rad covering the range of angles in degrees from d1 to d2, with the fill object.
i_arc_cfill(im, 50, 50, 35, 90, 135, fill);
Fills an arc centered at (x,y) with radius rad covering the range of angles in degrees from d1 to d2, with the fill object.
i_box(im, 0, 0, im->xsize-1, im->ysize-1, &color).
Outlines the box from (x1,y1) to (x2,y2) inclusive with color.
i_box_cfill(im, 0, 0, im->xsize-1, im->ysize-1, fill);
Fills the box from (x1,y1) to (x2,y2) inclusive with fill.
i_box_filled(im, 0, 0, im->xsize-1, im->ysize-1, &color);
Fills the box from (x1,y1) to (x2,y2) inclusive with color.
i_circle_aa(im, 50, 50, 45, &color);
Anti-alias fills a circle centered at (x,y) for radius rad with color.
i_flood_cfill(im, 50, 50, fill);
Flood fills the 4-connected region starting from the point ("seedx", "seedy") with "fill".
Returns false if ("seedx", "seedy") are outside the image.
i_flood_cfill_border(im, 50, 50, fill, border);
Flood fills the 4-connected region starting from the point ("seedx", "seedy") with "fill", the fill stops when it reaches pixels of color "border".
Returns false if ("seedx", "seedy") are outside the image.
i_flood_fill(im, 50, 50, &color);
Flood fills the 4-connected region starting from the point ("seedx", "seedy") with color.
Returns false if ("seedx", "seedy") are outside the image.
i_flood_fill_border(im, 50, 50, &color, &border);
Flood fills the 4-connected region starting from the point ("seedx", "seedy") with "color", fill stops when the fill reaches a pixels with color "border".
Returns false if ("seedx", "seedy") are outside the image.
Returns the number of pixels retrieved.
Returns the number of pixels retrieved.
Returns the number of indexes read.
Always returns 0 for direct color images.
Returns 0 if the pixel was retrieved, or -1 if not.
Returns 0 if the pixel was retrieved, or -1 if not.
If channels is NULL then the first channels_count channels are retrieved for each pixel.
Returns the number of samples read (which should be (right-left) * channel_count)
This is intended for output to image formats that don't support alpha channels.
Expect this to be slow unless "bits == im->bits".
Returns the number of samples copied, or -1 on error.
Not all image types implement this method.
Pushes errors, but does not call "i_clear_error()".
If "channels" is NULL then the first "channel_count" channels are retrieved for each pixel.
Returns the number of samples read (which should be ("right"-"left") * "channel_count")
This is intended for output to image formats that don't support alpha channels.
im - image to draw to
x1 - starting x coordinate
y1 - starting x coordinate
x2 - starting x coordinate
y2 - starting x coordinate
color - color to write to image
endp - endpoint flag (boolean)
The point (x2, y2) is drawn only if "endp" is set.
Returns the number of pixels set.
Returns the number of pixels set.
i_poly_aa_cfill(im, count, x, y, mode, fill);
Fill a polygon defined by the points specified by the x and y arrays with the fill specified by "fill".
i_poly_aa_m(im, count, x, y, mode, color);
Fill a polygon defined by the points specified by the x and y arrays with the color specified by "color".
i_poly_poly_aa(im, 1, &poly, mode, color);
Fill the "count" polygons defined by "polys" the color specified by "color".
At least one polygon must be supplied.
All polygons must have at least 3 points.
i_poly_poly_aa_cfill(im, 1, &poly, mode, fill);
Fill the "count" polygons defined by "polys" the fill specified by "fill".
At least one polygon must be supplied.
All polygons must have at least 3 points.
Returns the number of indexes written.
Always returns 0 for direct color images.
Returns 0 if the pixel was drawn, or -1 if not.
Does no alpha blending, just copies the channels from the supplied color to the image.
Returns 0 if the pixel was drawn, or -1 if not.
Does no alpha blending, just copies the channels from the supplied color to the image.
If "channels" is "NULL" then the first "channels_count" channels are written to for each pixel.
Returns the number of samples written, which should be (right - left) * channel_count. If a channel not in the image is in channels, left is negative, left is outside the image or y is outside the image, returns -1 and pushes an error.
Expect this to be slow unless "bits == im->bits".
Returns the number of samples copied, or -1 on error.
Not all image types implement this method.
Pushes errors, but does not call "i_clear_error()".
If "channels" is "NULL" then the first "channels_count" channels are written to for each pixel.
Returns the number of samples written, which should be (right - left) * channel_count. If a channel not in the image is in channels, left is negative, left is outside the image or y is outside the image, returns -1 and pushes an error.
i_push_errorf(errno, "Cannot open file %s: %d", filename, errno);
A version of i_push_error() that does printf() like formatting.
Does not support perl specific format codes.
im_clear_error(aIMCTX);
i_clear_error();
Clears the error stack.
Called by any Imager function before doing any other processing.
Also callable as "i_clear_error()".
i_push_error(0, "Yep, it's broken");
i_push_error(errno, "Error writing");
im_push_error(aIMCTX, 0, "Something is wrong");
Called by an Imager function to push an error message onto the stack.
No message is pushed if the stack is full (since this means someone forgot to call i_clear_error(), or that a function that doesn't do error handling is calling function that does.).
im_push_errorf(aIMCTX, errno, "Cannot open file %s: %d", filename, errno);
A version of im_push_error() that does printf() like formatting.
Does not support perl specific format codes.
va_args args;
va_start(args, lastarg);
im_push_errorvf(ctx, code, format, args);
Intended for use by higher level functions, takes a varargs pointer and a format to produce the finally pushed error message.
Does not support perl specific format codes.
Also callable as "i_push_errorvf(code, format, args)"
If not present, "bg" is set to black.
Returns 1 if the "i_background" tag was found and valid.
Implemented in terms of i_get_file_background().
If not present, "bg" is set to black.
Returns 1 if the "i_background" tag was found and valid.
im_get_image_file_limits(aIMCTX, &width, &height, &bytes)
i_get_image_file_limits(&width, &height, &bytes)
Retrieves the file limits set by i_set_image_file_limits().
Also callable as "i_get_image_file_limits(&width, &height, &bytes)".
im_int_check_image_file_limits(aIMCTX, width, height, channels, sizeof(i_sample_t))
i_int_check_image_file_limits(width, height, channels, sizeof(i_sample_t))
Checks the size of a file in memory against the configured image file limits.
This also range checks the values to those permitted by Imager and checks for overflows in calculating the size.
Returns non-zero if the file is within limits.
This function is intended to be called by image file read functions.
Also callable as "i_int_check_image_file_limits(width, height, channels, sizeof(i_sample_t)".
im_set_image_file_limits(aIMCTX, 500, 500, 1000000);
i_set_image_file_limits(500, 500, 1000000);
Set limits on the sizes of images read by Imager.
Setting a limit to 0 means that limit is ignored.
Negative limits result in failure.
Parameters:
Returns non-zero on success.
Also callable as "i_set_image_file_limits(width, height, bytes)".
fill = i_new_fill_fount(0, 0, 100, 100, i_ft_linear, i_ft_linear,
i_fr_triangle, 0, i_fts_grid, 9, 1, segs);
Creates a new general fill which fills with a fountain fill.
i_fill_t *fill = i_new_fill_hatch(&fg_color, &bg_color, combine, hatch, custom_hatch, dx, dy);
Creates a new hatched fill with the "fg" color used for the 1 bits in the hatch and "bg" for the 0 bits. If "combine" is non-zero alpha values will be combined.
If "cust_hatch" is non-NULL it should be a pointer to 8 bytes of the hash definition, with the high-bits to the left.
If "cust_hatch" is NULL then one of the standard hatches is used.
("dx", "dy") are an offset into the hatch which can be used to hatch adjoining areas out of alignment, or to align the origin of a hatch with the side of a filled area.
i_fill_t *fill = i_new_fill_hatchf(&fg_fcolor, &bg_fcolor, combine, hatch, custom_hatch, dx, dy);
Creates a new hatched fill with the "fg" color used for the 1 bits in the hatch and "bg" for the 0 bits. If "combine" is non-zero alpha values will be combined.
If "cust_hatch" is non-NULL it should be a pointer to 8 bytes of the hash definition, with the high-bits to the left.
If "cust_hatch" is NULL then one of the standard hatches is used.
("dx", "dy") are an offset into the hatch which can be used to hatch adjoining areas out of alignment, or to align the origin of a hatch with the side of a filled area.
i_fill_t *fill = i_new_fill_image(src_img, matrix, x_offset, y_offset, combine);
Create an image based fill.
matrix is an array of 9 doubles representing a transformation matrix.
"xoff" and "yoff" are the offset into the image to start filling from.
i_fill_t *fill = i_new_fill_solid(&color, combine);
Create a solid fill based on an 8-bit color.
If combine is non-zero then alpha values will be combined.
i_fill_t *fill = i_new_fill_solidf(&fcolor, combine);
Create a solid fill based on a float color.
If combine is non-zero then alpha values will be combined.
i_fill_destroy(fill);
Call to destroy any fill object.
Also callable as "io_new_bufchain()".
ctx - an Imager context object
data - buffer to read from
length - length of buffer
Also callable as "io_new_buffer(data, length".
In general the callbacks should behave like the corresponding POSIX primitives.
Also callable as "io_new_cb(p, readcb, writecb, seekcb, closecb, destroycb)".
ctx - and Imager context object
file - file descriptor to read/write from
Also callable as "io_new_fd(file)".
Returns 0 on success.
Returns true on success,
Returns EOF on failure, or a byte.
char buffer[BUFSIZ]
ssize_t len = i_io_gets(buffer, sizeof(buffer), '\n');
Read up to "size"-1 bytes from the stream "ig" into "buffer".
If the byte "end_of_line" is seen then no further bytes will be read.
Returns the number of bytes read.
Always "NUL" terminates the buffer.
On error or end of file, return EOF.
For unbuffered streams a single character buffer will be setup.
ssize_t count = i_io_peekn(ig, buffer, sizeof(buffer));
Buffer at least "size" (at most "ig->buf_size" bytes of data from the stream and return "size" bytes of it to the caller in "buffer".
This ignores the buffered state of the stream, and will always setup buffering if needed.
If no "type" parameter is provided to Imager::read() or Imager::read_multi(), Imager will call "i_io_peekn()" when probing for the file format.
Returns -1 on error, 0 if there is no data before EOF, or the number of bytes read into "buffer".
On success return c, on error returns EOF
Returns the number of bytes read. Returns 0 on end of file. Returns -1 on error.
Acts like perl's seek.
If you switch buffering off on a stream with buffering on:
Returns true on success. This may fail if any buffered output cannot be flushed.
ssize_t result = i_io_write(io, buffer, size)
Write to the given I/O stream.
Returns the number of bytes written.
ig - io_glue object
c - pointer to a pointer to where data should be copied to
char *data;
size_t size = io_slurp(ig, &data);
... do something with the data ...
myfree(data);
io_slurp() will abort the program if the supplied I/O layer is not from io_new_bufchain().
io_glue_destroy(ig);
Destroy an io_glue objects. Should clean up all related buffers.
ig - io_glue object to destroy.
Tags are not copied, only the image data.
Returns: i_img *
If "x1" > "x2" or "y1" > "y2" then the corresponding co-ordinates are swapped.
im - Image pointer
info - pointer to array to return data
info is an array of 4 integers with the following values:
info[0] - width
info[1] - height
info[2] - channels
info[3] - channel mask
The alpha channel of each pixel in "src" is used to control how much the existing color in "im" is replaced, if it is 255 then the color is completely replaced, if it is 0 then the original color is left unmodified.
i_img *img = i_sametype(src, width, height);
Returns an image of the same type (sample size, channels, paletted/direct).
For paletted images the palette is copied from the source.
i_img *img = i_sametype_chans(src, width, height, channels);
Returns an image of the same type (sample size).
For paletted images the equivalent direct type is returned.
i_img *img = im_img_16_new(aIMCTX, width, height, channels);
i_img *img = i_img_16_new(width, height, channels);
Create a new 16-bit/sample image.
Returns the image on success, or NULL on failure.
Also callable as "i_img_16_new(x, y, ch)"
i_img *img = im_img_8_new(aIMCTX, width, height, channels);
i_img *img = i_img_8_new(width, height, channels);
Creates a new image object x pixels wide, and y pixels high with ch channels.
i_img *img = im_img_double_new(aIMCTX, width, height, channels);
i_img *img = i_img_double_new(width, height, channels);
Creates a new double per sample image.
Also callable as "i_img_double_new(width, height, channels)".
i_img *img = im_img_pal_new(aIMCTX, width, height, channels, max_palette_size)
i_img *img = i_img_pal_new(width, height, channels, max_palette_size)
Creates a new paletted image of the supplied dimensions.
"maxpal" is the maximum palette size and should normally be 256.
Returns a new image or NULL on failure.
Also callable as "i_img_pal_new(width, height, channels, max_palette_size)".
i_img_destroy(img)
Destroy an image object
i_img *im = im_img_alloc(aIMCTX);
i_img *im = i_img_alloc();
Allocates a new i_img structure.
When implementing a new image type perform the following steps in your image object creation function:
im_img_init(aIMCTX, im);
i_img_init(im);
Imager internal initialization of images.
See "im_img_alloc(aIMCTX)" for more information.
int alpha_channel;
int has_alpha = i_img_alpha_channel(im, &alpha_channel);
Work out the alpha channel for an image.
If the image has an alpha channel, sets *channel to the alpha channel index and returns non-zero.
If the image has no alpha channel, returns zero and *channel is not modified.
"channel" may be "NULL".
int color_channels = i_img_color_channels(im);
Returns the number of color channels in the image. For now this is always 1 (for grayscale) or 3 (for RGB) but may be 0 in some special cases in a future release of Imager.
i_color_model_t cm = i_img_color_model(im);
Returns the color model for the image.
A future version of Imager will allow for images with extra channels beyond gray/rgb and alpha.
i_img_dim height = i_img_get_height(im);
Returns the height in pixels of the image.
i_img_dim width = i_img_get_width(im);
Returns the width in pixels of the image.
int channels = i_img_getchannels(img);
Get the number of channels in "im".
int mask = i_img_getmask(img);
Get the image channel mask for "im".
The idea is that a file writer can use this to test where it should write the image in whatever bi-level format it uses, eg. "pbm" for "pnm".
For performance of encoders we require monochrome images:
"zero_is_white" is set to non-zero if the first palette entry is white.
// only channel 0 writable
i_img_setmask(img, 0x01);
Set the image channel mask for "im" to "ch_mask".
The image channel mask gives some control over which channels can be written to in the image.
On success returns a pointer to a memory block of "img->xsize * img->ysize" "i_palidx" entries.
On failure returns NULL.
You should call myfree() on the returned block when you're done with it.
This function will fail if the supplied palette contains no colors.
The method used depends on the tr_* members of "quant".
i_mutex_t mutex;
Opaque type for Imager's mutex API.
i_mutex_t m = i_mutex_new();
Create a mutex.
If a critical section cannot be created for whatever reason, Imager will abort.
i_mutex_destroy(m);
Destroy a mutex.
i_mutex_lock(m);
Lock the mutex, waiting if another thread has the mutex locked.
i_mutex_unlock(m);
Release the mutex.
The behavior of releasing a mutex you don't hold is unspecified.
On success returns the index of the lowest color added.
On failure returns -1.
Always fails for direct color images.
Returns -1 for direct images.
On success sets *entry to the index of the color, and returns true.
On failure returns false.
Always fails on direct color images.
On success stores the colors into colors and returns true.
On failure returns false.
Always fails for direct color images.
Fails if there are less than index+count colors in the image's palette.
Returns -1 for direct color images.
On success returns true.
On failure returns false.
The image must have at least index+count colors in it's palette for this to succeed.
Always fails on direct color images.
Returns the number of tags deleted.
Returns the number of tags deleted.
Returns true on success.
On success returns true and sets *entry.
On failure returns false.
On success returns true and sets *entry.
On failure returns false.
On success sets the i_color *value to the color and returns true.
On failure returns false.
If the tag has a string value then that is parsed as a floating point number, otherwise the integer value of the tag is used.
On success sets *value and returns true.
On failure returns false.
On success sets the int *value to the integer and returns true.
On failure returns false.
On success copies the string to value for a max of value_size and returns true.
On failure returns false.
value_size must be at least large enough for a string representation of an integer.
The copied value is always "NUL" terminated.
This should be called tags member of an i_img object on creation (in i_img_*_new() functions).
To destroy the contents use i_tags_destroy()
i_tags_set(&img->tags, "i_comment", -1);
Sets the given tag to the string data
If size is -1 then the strlen(data) bytes are stored.
Even on failure, if an existing tag name exists, it will be removed.
Since tags are strings or ints, we convert the value to a string before storage at the precision specified by "places".
i_tags_setn(&img->tags, "i_xres", 204);
i_tags_setn(&img->tags, "i_yres", 196);
Sets the given tag to the integer "idata"
Even on failure, if an existing tag "name" exists, it will be removed.
Modifies *p and *len to indicate the consumed characters.
This doesn't support the extended "UTF-8" encoding used by later versions of Perl. Since this is typically used to implement text output by font drivers, the strings supplied shouldn't have such out of range characters.
This doesn't check that the "UTF-8" character is using the shortest possible representation.
Returns ~0UL on failure.
im_context_refdec(aIMCTX, "a description");
Remove a reference to the context, releasing it if all references have been removed.
im_context_refinc(aIMCTX, "a description");
Add a new reference to the context.
"desctructor" will be called when the context is destroyed if the corresponding slot is non-NULL.
Returns true on success.
Aborts if the slot supplied is invalid.
If reallocation of slot storage fails, returns false.
The data from "data_base" for "data_size" bytes will be scanned for EXIF data.
Any data found will be used to set tags in the supplied image.
The intent is that invalid EXIF data will simply fail to set tags, and write to the log. In no case should this code exit when supplied invalid data.
Returns true if an EXIF header was seen.
i_errmsg *errors = im_errors(aIMCTX);
i_errmsg *errors = i_errors();
Returns a pointer to the first element of an array of error messages, terminated by a NULL pointer. The highest level message is first.
Also callable as "i_errors()".
Inside Imager itself this is just a function pointer, which the Imager.xs BOOT handler initializes for use within perl. If you're taking the Imager code and embedding it elsewhere you need to initialize the "im_get_context" pointer at some point.
The following API functions are undocumented so far, hopefully this will change:
Tony Cook <tonyc@cpan.org>
Imager, Imager::API, Imager::ExtUtils, Imager::Inline
| 2023-01-11 | perl v5.36.0 |