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sync code with last improvements from OpenBSD

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purplerain 2023-08-28 05:57:34 +00:00
commit 88965415ff
Signed by: purplerain
GPG key ID: F42C07F07E2E35B7
26235 changed files with 29195616 additions and 0 deletions
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lib/xcb-util-image/image/Makefile.am Normal file
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check: check-am
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# Tell versions [3.59,3.63) of GNU make to not export all variables.
# Otherwise a system limit (for SysV at least) may be exceeded.
.NOEXPORT:

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prefix=@prefix@
exec_prefix=@exec_prefix@
libdir=@libdir@
includedir=@includedir@
Name: XCB Image library
Description: XCB image convenience library
Version: @PACKAGE_VERSION@
Requires: xcb xcb-shm
Libs: -L${libdir} -lxcb-image @LIBS@
Cflags: -I${includedir}

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#ifndef __XCB_BITOPS_H__
#define __XCB_BITOPS_H__
/* Copyright (C) 2007 Bart Massey
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the names of the authors or their
* institutions shall not be used in advertising or otherwise to promote the
* sale, use or other dealings in this Software without prior written
* authorization from the authors.
*/
#include <assert.h>
#include <inttypes.h>
#include <X11/Xfuncproto.h>
/**
* @defgroup xcb__bitops XCB Bit Operations
*
* Inline functions for common bit ops used in XCB and elsewhere.
*
* @{
*/
/**
* Create a low-order bitmask.
* @param n Mask size.
* @return Mask.
*
* Create a bitmask with the lower @p n bits set and the
* rest of the word clear.
* @ingroup xcb__bitops
*/
_X_INLINE static uint32_t
xcb_mask(uint32_t n)
{
return n == 32 ? ~0 : (1 << n) - 1;
}
/**
* Population count.
* @param n Integer representing a bitset.
* @return Number of 1 bits in the bitset.
*
* This is a reasonably fast algorithm for counting the bits
* in a 32-bit word. Currently a classic binary
* divide-and-conquer popcount: popcount_2() from
* http://en.wikipedia.org/wiki/Hamming_weight.
* @ingroup xcb__bitops
*/
/* 15 ops, 3 long immediates, 14 stages, 9 alu ops, 9 alu stages */
_X_INLINE static uint32_t
xcb_popcount(uint32_t x)
{
uint32_t m1 = 0x55555555;
uint32_t m2 = 0x33333333;
uint32_t m4 = 0x0f0f0f0f;
x -= (x >> 1) & m1;
x = (x & m2) + ((x >> 2) & m2);
x = (x + (x >> 4)) & m4;
x += x >> 8;
return (x + (x >> 16)) & 0x3f;
}
/**
* Round up to the next power-of-two unit size.
* @param base Number to be rounded up.
* @param pad Multiple to be rounded to; must be a power of two.
* @return Rounded-up number.
*
* Rounds @p base up to a multiple of @p pad, where @p pad
* is a power of two. The more general case is handled by
* xcb_roundup().
* @ingroup xcb__bitops
*/
_X_INLINE static uint32_t
xcb_roundup_2 (uint32_t base, uint32_t pad)
{
return (base + pad - 1) & -pad;
}
/**
* Round down to the next power-of-two unit size.
* @param base Number to be rounded down.
* @param pad Multiple to be rounded to; must be a power of two.
* @return Rounded-down number.
*
* Rounds @p base down to a multiple of @p pad, where @p pad
* is a power of two. The more general case is handled by
* xcb_rounddown().
* @ingroup xcb__bitops
*/
_X_INLINE static uint32_t
xcb_rounddown_2 (uint32_t base, uint32_t pad)
{
return base & -pad;
}
/**
* Round up to the next unit size.
* @param base Number to be rounded up.
* @param pad Multiple to be rounded to.
* @return Rounded-up number.
*
* This is a general routine for rounding @p base up
* to a multiple of @p pad. If you know that @p pad
* is a power of two, you should probably call xcb_roundup_2()
* instead.
* @ingroup xcb__bitops
*/
_X_INLINE static uint32_t
xcb_roundup (uint32_t base, uint32_t pad)
{
uint32_t b = base + pad - 1;
/* faster if pad is a power of two */
if (((pad - 1) & pad) == 0)
return b & -pad;
return b - b % pad;
}
/**
* Round down to the next unit size.
* @param base Number to be rounded down.
* @param pad Multiple to be rounded to.
* @return Rounded-down number.
*
* This is a general routine for rounding @p base down
* to a multiple of @p pad. If you know that @p pad
* is a power of two, you should probably call xcb_rounddown_2()
* instead.
* @ingroup xcb__bitops
*/
_X_INLINE static uint32_t
xcb_rounddown (uint32_t base, uint32_t pad)
{
/* faster if pad is a power of two */
if (((pad - 1) & pad) == 0)
return base & -pad;
return base - base % pad;
}
/**
* Reverse bits of word.
* @param x Target word.
* @param n Number of low-order bits to reverse.
* @return Word with low @p n bits reversed, all others 0.
*
* Reverses the bottom @p n bits of @p x.
* @ingroup xcb__bitops
*/
_X_INLINE static uint32_t
xcb_bit_reverse(uint32_t x, uint8_t n) {
uint32_t m1 = 0x00ff00ff;
uint32_t m2 = 0x0f0f0f0f;
uint32_t m3 = 0x33333333;
uint32_t m4 = 0x55555555;
x = ((x << 16) | (x >> 16));
x = ((x & m1) << 8) | ((x >> 8) & m1);
x = ((x & m2) << 4) | ((x >> 4) & m2);
x = ((x & m3) << 2) | ((x >> 2) & m3);
x = ((x & m4) << 1) | ((x >> 1) & m4);
x >>= 32 - n;
return x;
}
/**
* Host byte order.
* @return The byte order of the host.
*
* Tests the host's byte order and returns either
* XCB_IMAGE_ORDER_MSB_FIRST or XCB_IMAGE_ORDER_LSB_FIRST
* as appropriate.
* @ingroup xcb__bitops
*/
_X_INLINE static xcb_image_order_t
xcb_host_byte_order(void) {
uint32_t endian_test = 0x01020304;
switch (*(char *)&endian_test) {
case 0x01:
return XCB_IMAGE_ORDER_MSB_FIRST;
case 0x04:
return XCB_IMAGE_ORDER_LSB_FIRST;
}
assert(0);
}
#endif /* __XCB_BITOPS_H__ */

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#ifndef __XCB_IMAGE_H__
#define __XCB_IMAGE_H__
/* Copyright (C) 2007 Bart Massey
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the names of the authors or their
* institutions shall not be used in advertising or otherwise to promote the
* sale, use or other dealings in this Software without prior written
* authorization from the authors.
*/
#include <xcb/xcb.h>
#include <xcb/shm.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* @defgroup xcb__image_t XCB Image Functions
*
* These are functions used to create and manipulate X images.
*
* The X image format we use is specific to this software,
* which is probably a bug; it represents an intermediate
* position between the wire format used by the X GetImage
* and PutImage requests and standard formats like PBM. An
* image consists of a header of type @ref xcb_image_t
* describing the properties of the image, together with a
* pointer to the image data itself.
*
* X wire images come in three formats. An xy-bitmap is a
* bit-packed format that will be expanded to a two-color
* pixmap using a GC when sent over the wire by PutImage.
* An xy-pixmap is one or more bit-planes, each in the same
* format as xy-bitmap. A z-pixmap is a more conventional
* pixmap representation, with each pixel packed into a
* word. Pixmaps are sent and received over the wire only
* to/from drawables of their depth.
*
* Each X server defines, for each depth and format,
* properties of images in that format that are sent and
* received on the wire. We refer to this as a "native"
* image for a given X server. It is not uncommon to want
* to work with non-native images on the client side, or to
* convert between the native images of different servers.
*
* This library provides several things. Facilities for
* creating and destroying images are, of course, provided.
* Wrappers for xcb_get_image() and xcb_put_image() are
* provided; these utilize the image header to simplify the
* interface. Routines for getting and putting image pixels
* are provided: both a generic form that works with
* arbitrary images, and fastpath forms for some common
* cases. Conversion routines are provided for X images;
* these routines have been fairly well optimized for the
* common cases, and should run fast even on older hardware.
* A routine analogous to Xlib's XCreate*FromBitmapData() is
* provided for creating X images from xbm-format data; this
* routine is in this library only because it is a trivial
* use case for the library.
*
* @{
*/
typedef struct xcb_image_t xcb_image_t;
/**
* @struct xcb_image_t
* A structure that describes an xcb_image_t.
*/
struct xcb_image_t
{
uint16_t width; /**< Width in pixels, excluding pads etc. */
uint16_t height; /**< Height in pixels. */
xcb_image_format_t format; /**< Format. */
uint8_t scanline_pad; /**< Right pad in bits. Valid pads
* are 8, 16, 32.
*/
uint8_t depth; /**< Depth in bits. Valid depths
* are 1, 4, 8, 16, 24 for z format,
* 1 for xy-bitmap-format, anything
* for xy-pixmap-format.
*/
uint8_t bpp; /**< Storage per pixel in bits.
* Must be >= depth. Valid bpp
* are 1, 4, 8, 16, 24, 32 for z
* format, 1 for xy-bitmap format,
* anything for xy-pixmap-format.
*/
uint8_t unit; /**< Scanline unit in bits for
* xy formats and for bpp == 1,
* in which case valid scanline
* units are 8, 16, 32. Otherwise,
* will be max(8, bpp). Must be >= bpp.
*/
uint32_t plane_mask; /**< When format is
* xy-pixmap and depth >
* 1, this says which
* planes are "valid" in
* some vague sense.
* Currently used only
* by xcb_image_get/put_pixel(),
* and set only by
* xcb_image_get().
*/
xcb_image_order_t byte_order; /**< Component byte order
* for z-pixmap, byte
* order of scanline unit
* for xy-bitmap and
* xy-pixmap. Nybble
* order for z-pixmap
* when bpp == 4.
*/
xcb_image_order_t bit_order; /**< Bit order of
* scanline unit for
* xy-bitmap and
* xy-pixmap.
*/
uint32_t stride; /**< Bytes per image row.
* Computable from other
* data, but cached for
* convenience/performance.
*/
uint32_t size; /**< Size of image data in bytes.
* Computable from other
* data, but cached for
* convenience/performance.
*/
void * base; /**< Malloced block of storage that
* will be freed by
* @ref xcb_image_destroy() if non-null.
*/
uint8_t * data; /**< The actual image. */
};
typedef struct xcb_shm_segment_info_t xcb_shm_segment_info_t;
/**
* @struct xcb_shm_segment_info_t
* A structure that stores the informations needed by the MIT Shm
* Extension.
*/
struct xcb_shm_segment_info_t
{
xcb_shm_seg_t shmseg;
uint32_t shmid;
uint8_t *shmaddr;
};
/**
* Update the cached data of an image.
* @param image The image.
*
* An image's size and stride, among other things, are
* cached in its structure. This function recomputes those
* cached values for the given image.
* @ingroup xcb__image_t
*/
void
xcb_image_annotate (xcb_image_t *image);
/**
* Create a new image.
* @param width The width of the image, in pixels.
* @param height The height of the image, in pixels.
* @param format The format of the image.
* @param xpad The scanline pad of the image.
* @param depth The depth of the image.
* @param bpp The depth of the image storage.
* @param unit The unit of image representation, in bits.
* @param byte_order The byte order of the image.
* @param bit_order The bit order of the image.
* @param base The base address of malloced image data.
* @param bytes The size in bytes of the storage pointed to by base.
* If base == 0 and bytes == ~0 and data == 0 on
* entry, no storage will be auto-allocated.
* @param data The image data. If data is null and bytes != ~0, then
* an attempt will be made to fill in data; from
* base if it is non-null (and bytes is large enough), else
* by mallocing sufficient storage and filling in base.
* @return The new image.
*
* This function allocates the memory needed for an @ref xcb_image_t structure
* with the given properties. See the description of xcb_image_t for details.
* This function initializes and returns a pointer to the
* xcb_image_t structure. It may try to allocate or reserve data for the
* structure, depending on how @p base, @p bytes and @p data are set.
*
* The image must be destroyed with xcb_image_destroy().
* @ingroup xcb__image_t
*/
xcb_image_t *
xcb_image_create (uint16_t width,
uint16_t height,
xcb_image_format_t format,
uint8_t xpad,
uint8_t depth,
uint8_t bpp,
uint8_t unit,
xcb_image_order_t byte_order,
xcb_image_order_t bit_order,
void * base,
uint32_t bytes,
uint8_t * data);
/**
* Create a new image in connection-native format.
* @param c The connection.
* @param width The width of the image, in pixels.
* @param height The height of the image, in pixels.
* @param format The format of the image.
* @param depth The depth of the image.
* @param base The base address of malloced image data.
* @param bytes The size in bytes of the storage pointed to by base.
* If base == 0 and bytes == ~0 and data == 0 on
* entry, no storage will be auto-allocated.
* @param data The image data. If data is null and bytes != ~0, then
* an attempt will be made to fill in data; from
* base if it is non-null (and bytes is large enough), else
* by mallocing sufficient storage and filling in base.
* @return The new image.
*
* This function calls @ref xcb_image_create() with the given
* properties, and with the remaining properties chosen
* according to the "native format" with the given
* properties on the current connection.
*
* It is usual to use this rather
* than calling xcb_image_create() directly.
* @ingroup xcb__image_t
*/
xcb_image_t *
xcb_image_create_native (xcb_connection_t * c,
uint16_t width,
uint16_t height,
xcb_image_format_t format,
uint8_t depth,
void * base,
uint32_t bytes,
uint8_t * data);
/**
* Destroy an image.
* @param image The image to be destroyed.
*
* This function frees the memory associated with the @p image
* parameter. If its base pointer is non-null, it frees
* that also.
* @ingroup xcb__image_t
*/
void
xcb_image_destroy (xcb_image_t *image);
/**
* Get an image from the X server.
* @param conn The connection to the X server.
* @param draw The drawable to get the image from.
* @param x The x coordinate in pixels, relative to the origin of the
* drawable and defining the upper-left corner of the rectangle.
* @param y The y coordinate in pixels, relative to the origin of the
* drawable and defining the upper-left corner of the rectangle.
* @param width The width of the subimage in pixels.
* @param height The height of the subimage in pixels.
* @param plane_mask The plane mask. See the protocol document for details.
* @param format The format of the image.
* @return The subimage of @p draw defined by @p x, @p y, @p w, @p h.
*
* This function returns a new image taken from the
* given drawable @p draw.
* The image will be in connection native format. If the @p format
* is xy-bitmap and the @p plane_mask masks bit planes out, those
* bit planes will be made part of the returned image anyway,
* by zero-filling them; this will require a fresh memory allocation
* and some copying. Otherwise, the resulting image will use the
* xcb_get_image_reply() record as its backing store.
*
* If a problem occurs, the function returns null.
* @ingroup xcb__image_t
*/
xcb_image_t *
xcb_image_get (xcb_connection_t * conn,
xcb_drawable_t draw,
int16_t x,
int16_t y,
uint16_t width,
uint16_t height,
uint32_t plane_mask,
xcb_image_format_t format);
/**
* Put an image onto the X server.
* @param conn The connection to the X server.
* @param draw The draw you get the image from.
* @param gc The graphic context.
* @param image The image you want to combine with the rectangle.
* @param x The x coordinate, which is relative to the origin of the
* drawable and defines the x coordinate of the upper-left corner of the
* rectangle.
* @param y The y coordinate, which is relative to the origin of the
* drawable and defines the x coordinate of the upper-left corner of
* the rectangle.
* @param left_pad Notionally shift an xy-bitmap or xy-pixmap image
* to the right some small amount, for some reason. XXX Not clear
* this is currently supported correctly.
* @return The cookie returned by xcb_put_image().
*
* This function combines an image with a rectangle of the
* specified drawable @p draw. The image must be in native
* format for the connection. The image is drawn at the
* specified location in the drawable. For the xy-bitmap
* format, the foreground pixel in @p gc defines the source
* for the one bits in the image, and the background pixel
* defines the source for the zero bits. For xy-pixmap and
* z-pixmap formats, the depth of the image must match the
* depth of the drawable; the gc is ignored.
*
* @ingroup xcb__image_t
*/
xcb_void_cookie_t
xcb_image_put (xcb_connection_t * conn,
xcb_drawable_t draw,
xcb_gcontext_t gc,
xcb_image_t * image,
int16_t x,
int16_t y,
uint8_t left_pad);
/**
* Check image for or convert image to native format.
* @param c The connection to the X server.
* @param image The image.
* @param convert If 0, just check the image for native format.
* Otherwise, actually convert it.
* @return Null if the image is not in native format and can or will not
* be converted. Otherwise, the native format image.
*
* Each X display has its own "native format" for images of a given
* format and depth. This function either checks whether the given
* @p image is in native format for the given connection @p c, or
* actually tries to convert the image to native format, depending
* on whether @p convert is true or false.
*
* When @p convert is true, and the image is not in native format
* but can be converted, it will be, and a pointer to the new image
* will be returned. The image passed in will be unharmed in this
* case; it is the caller's responsibility to check that the returned
* pointer is different and to dispose of the old image if desired.
* @ingroup xcb__image_t
*/
xcb_image_t *
xcb_image_native (xcb_connection_t * c,
xcb_image_t * image,
int convert);
/**
* Put a pixel to an image.
* @param image The image.
* @param x The x coordinate of the pixel.
* @param y The y coordinate of the pixel.
* @param pixel The new pixel value.
*
* This function overwrites the pixel in the given @p image with the
* specified @p pixel value (in client format). The image must contain the @p x
* and @p y coordinates, as no clipping is done. This function honors
* the plane-mask for xy-pixmap images.
* @ingroup xcb__image_t
*/
void
xcb_image_put_pixel (xcb_image_t *image,
uint32_t x,
uint32_t y,
uint32_t pixel);
/**
* Get a pixel from an image.
* @param image The image.
* @param x The x coordinate of the pixel.
* @param y The y coordinate of the pixel.
* @return The pixel value.
*
* This function retrieves a pixel from the given @p image.
* The image must contain the @p x
* and @p y coordinates, as no clipping is done. This function honors
* the plane-mask for xy-pixmap images.
* @ingroup xcb__image_t
*/
uint32_t
xcb_image_get_pixel (xcb_image_t *image,
uint32_t x,
uint32_t y);
/**
* Convert an image to a new format.
* @param src Source image.
* @param dst Destination image.
* @return The @p dst image, or null on error.
*
* This function tries to convert the image data of the @p
* src image to the format implied by the @p dst image,
* overwriting the current destination image data.
* The source and destination must have the same
* width, height, and depth. When the source and destination
* are already the same format, a simple copy is done. Otherwise,
* when the destination has the same bits-per-pixel/scanline-unit
* as the source, an optimized copy routine (thanks to Keith Packard)
* is used for the conversion. Otherwise, the copy is done the
* slow, slow way with @ref xcb_image_get_pixel() and
* @ref xcb_image_put_pixel() calls.
* @ingroup xcb__image_t
*/
xcb_image_t *
xcb_image_convert (xcb_image_t * src,
xcb_image_t * dst);
/**
* Extract a subimage of an image.
* @param image Source image.
* @param x X coordinate of subimage.
* @param y Y coordinate of subimage.
* @param width Width of subimage.
* @param height Height of subimage.
* @param base Base of memory allocation.
* @param bytes Size of base allocation.
* @param data Memory allocation.
* @return The subimage, or null on error.
*
* Given an image, this function extracts the subimage at the
* given coordinates. The requested subimage must be entirely
* contained in the source @p image. The resulting image will have the same
* general image parameters as the source image. The @p base, @p bytes,
* and @p data arguments are passed to @ref xcb_create_image() unaltered
* to create the destination image---see its documentation for details.
*
* @ingroup xcb__image_t
*/
xcb_image_t *
xcb_image_subimage(xcb_image_t * image,
uint32_t x,
uint32_t y,
uint32_t width,
uint32_t height,
void * base,
uint32_t bytes,
uint8_t * data);
/*
* Shm stuff
*/
/**
* Put the data of an xcb_image_t onto a drawable using the MIT Shm
* Extension.
* @param conn The connection to the X server.
* @param draw The draw you get the image from.
* @param gc The graphic context.
* @param image The image you want to combine with the rectangle.
* @param shminfo A @ref xcb_shm_segment_info_t structure.
* @param src_x The offset in x from the left edge of the image
* defined by the xcb_image_t structure.
* @param src_y The offset in y from the left edge of the image
* defined by the xcb_image_t structure.
* @param dest_x The x coordinate, which is relative to the origin of the
* drawable and defines the x coordinate of the upper-left corner of the
* rectangle.
* @param dest_y The y coordinate, which is relative to the origin of the
* drawable and defines the x coordinate of the upper-left corner of
* the rectangle.
* @param src_width The width of the subimage, in pixels.
* @param src_height The height of the subimage, in pixels.
* @param send_event Indicates whether or not a completion event
* should occur when the image write is complete.
* @return a pointer to the source image if no problem occurs, otherwise 0.
*
* This function combines an image in memory with a shape of the
* specified drawable. The section of the image defined by the @p x, @p y,
* @p width, and @p height arguments is drawn on the specified part of
* the drawable. If XYBitmap format is used, the depth must be
* one, or a``BadMatch'' error results. The foreground pixel in the
* Graphic Context @p gc defines the source for the one bits in the
* image, and the background pixel defines the source for the zero
* bits. For XYPixmap and ZPixmap, the depth must match the depth of
* the drawable, or a ``BadMatch'' error results.
*
* @ingroup xcb__image_t
*/
xcb_image_t *
xcb_image_shm_put (xcb_connection_t * conn,
xcb_drawable_t draw,
xcb_gcontext_t gc,
xcb_image_t * image,
xcb_shm_segment_info_t shminfo,
int16_t src_x,
int16_t src_y,
int16_t dest_x,
int16_t dest_y,
uint16_t src_width,
uint16_t src_height,
uint8_t send_event);
/**
* Read image data into a shared memory xcb_image_t.
* @param conn The connection to the X server.
* @param draw The draw you get the image from.
* @param image The image you want to combine with the rectangle.
* @param shminfo A @ref xcb_shm_segment_info_t structure.
* @param x The x coordinate, which are relative to the origin of the
* drawable and define the upper-left corner of the rectangle.
* @param y The y coordinate, which are relative to the origin of the
* drawable and define the upper-left corner of the rectangle.
* @param plane_mask The plane mask.
* @return The subimage of @p draw defined by @p x, @p y, @p w, @p h.
*
* This function reads image data into a shared memory xcb_image_t where
* @p conn is the connection to the X server, @p draw is the source
* drawable, @p image is the destination xcb_image_t, @p x and @p y are offsets
* within the drawable, and @p plane_mask defines which planes are to be
* read.
*
* If a problem occurs, the function returns @c 0. It returns 1
* otherwise.
* @ingroup xcb__image_t
*/
int xcb_image_shm_get (xcb_connection_t * conn,
xcb_drawable_t draw,
xcb_image_t * image,
xcb_shm_segment_info_t shminfo,
int16_t x,
int16_t y,
uint32_t plane_mask);
/**
* Create an image from user-supplied bitmap data.
* @param data Image data in packed bitmap format.
* @param width Width in bits of image data.
* @param height Height in bits of image data.
* @return The image constructed from the image data, or 0 on error.
*
* This function creates an image from the user-supplied
* bitmap @p data. The bitmap data is assumed to be in
* xbm format (i.e., 8-bit scanline unit, LSB-first, 8-bit pad).
* @ingroup xcb__image_t
*/
xcb_image_t *
xcb_image_create_from_bitmap_data (uint8_t * data,
uint32_t width,
uint32_t height);
/**
* Create a pixmap from user-supplied bitmap data.
* @param display The connection to the X server.
* @param d The parent drawable for the pixmap.
* @param data Image data in packed bitmap format.
* @param width Width in bits of image data.
* @param height Height in bits of image data.
* @param depth Depth of the desired pixmap.
* @param fg Pixel for one-bits of pixmaps with depth larger than one.
* @param bg Pixel for zero-bits of pixmaps with depth larger than one.
* @param gcp If this pointer is non-null, the GC created to
* fill in the pixmap is stored here; it will have its foreground
* and background set to the supplied value. Otherwise, the GC
* will be freed.
* @return The pixmap constructed from the image data, or 0 on error.
*
* This function creates a pixmap from the user-supplied
* bitmap @p data. The bitmap data is assumed to be in
* xbm format (i.e., 8-bit scanline unit, LSB-first, 8-bit pad).
* If @p depth is greater than 1, the
* bitmap will be expanded to a pixmap using the given
* foreground and background pixels @p fg and @p bg.
* @ingroup xcb__image_t
*/
xcb_pixmap_t
xcb_create_pixmap_from_bitmap_data (xcb_connection_t * display,
xcb_drawable_t d,
uint8_t * data,
uint32_t width,
uint32_t height,
uint32_t depth,
uint32_t fg,
uint32_t bg,
xcb_gcontext_t * gcp);
/**
* @}
*/
#ifdef __cplusplus
}
#endif
#endif /* __XCB_IMAGE_H__ */

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#ifndef __XCB_PIXEL_H__
#define __XCB_PIXEL_H__
/* Copyright (C) 2007 Bart Massey
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the names of the authors or their
* institutions shall not be used in advertising or otherwise to promote the
* sale, use or other dealings in this Software without prior written
* authorization from the authors.
*/
#include <inttypes.h>
#include <X11/Xfuncproto.h>
#ifndef BUILD
#include <xcb/xcb_bitops.h>
#include <xcb/xcb_image.h>
#endif
/**
* XCB Image fast pixel ops.
*
* Fast inline versions of xcb_image_get_pixel() and
* xcb_image_put_pixel() for various common cases.
* The naming convention is xcb_image_put_pixel_FUB()
* where F is the format and is either XY for bitmaps
* or Z for pixmaps, U is the bitmap unit size or pixmap
* bits-per-pixel, and B is the endianness (if needed)
* and is either M for most-significant-first or L for
* least-significant-first. Note that no checking
* is done on the arguments to these routines---caller beware.
* Also note that the pixel type is chosen to be appropriate
* to the unit; bitmaps use int and pixmaps use the appropriate
* size of unsigned.
* @ingroup xcb__image_t
*/
_X_INLINE static void
xcb_image_put_pixel_XY32M (xcb_image_t *image,
uint32_t x,
uint32_t y,
int pixel)
{
uint32_t unit = (x >> 3) & ~xcb_mask(2);
uint32_t byte = xcb_mask(2) - ((x >> 3) & xcb_mask(2));
uint32_t bit = xcb_mask(3) - (x & xcb_mask(3));
uint8_t m = 1 << bit;
uint8_t p = pixel << bit;
uint8_t * bp = image->data + (y * image->stride) + (unit | byte);
*bp = (*bp & ~m) | p;
}
_X_INLINE static void
xcb_image_put_pixel_XY32L (xcb_image_t *image,
uint32_t x,
uint32_t y,
int pixel)
{
uint32_t bit = x & xcb_mask(3);
uint8_t m = 1 << bit;
uint8_t p = pixel << bit;
uint8_t * bp = image->data + (y * image->stride) + (x >> 3);
*bp = (*bp & ~m) | p;
}
_X_INLINE static int
xcb_image_get_pixel_XY32M (xcb_image_t *image,
uint32_t x,
uint32_t y)
{
uint32_t unit = (x >> 3) & ~xcb_mask(2);
uint32_t byte = xcb_mask(2) - ((x >> 3) & xcb_mask(2));
uint32_t bit = xcb_mask(3) - (x & xcb_mask(3));
uint8_t * bp = image->data + (y * image->stride) + (unit | byte);
return (*bp >> bit) & 1;
}
_X_INLINE static int
xcb_image_get_pixel_XY32L (xcb_image_t *image,
uint32_t x,
uint32_t y)
{
uint32_t bit = x & xcb_mask(3);
uint8_t * bp = image->data + (y * image->stride) + (x >> 3);
return (*bp >> bit) & 1;
}
_X_INLINE static void
xcb_image_put_pixel_Z8 (xcb_image_t *image,
uint32_t x,
uint32_t y,
uint8_t pixel)
{
image->data[x + y * image->stride] = pixel;
}
_X_INLINE static uint8_t
xcb_image_get_pixel_Z8 (xcb_image_t *image,
uint32_t x,
uint32_t y)
{
return image->data[x + y * image->stride];
}
_X_INLINE static void
xcb_image_put_pixel_Z32M (xcb_image_t *image,
uint32_t x,
uint32_t y,
uint32_t pixel)
{
uint8_t * row = image->data + (y * image->stride);
row[x << 2] = pixel >> 24;
row[(x << 2) + 1] = pixel >> 16;
row[(x << 2) + 2] = pixel >> 8;
row[(x << 2) + 3] = pixel;
}
_X_INLINE static void
xcb_image_put_pixel_Z32L (xcb_image_t *image,
uint32_t x,
uint32_t y,
uint32_t pixel)
{
uint8_t * row = image->data + (y * image->stride);
row[x << 2] = pixel;
row[(x << 2) + 1] = pixel >> 8;
row[(x << 2) + 2] = pixel >> 16;
row[(x << 2) + 3] = pixel >> 24;
}
_X_INLINE static uint32_t
xcb_image_get_pixel_Z32M (xcb_image_t *image,
uint32_t x,
uint32_t y)
{
uint8_t * row = image->data + (y * image->stride);
uint32_t pixel = row[x << 2] << 24;
pixel |= row[(x << 2) + 1] << 16;
pixel |= row[(x << 2) + 2] << 8;
return pixel | row[(x << 2) + 3];
}
_X_INLINE static uint32_t
xcb_image_get_pixel_Z32L (xcb_image_t *image,
uint32_t x,
uint32_t y)
{
uint8_t * row = image->data + (y * image->stride);
uint32_t pixel = row[x << 2];
pixel |= row[(x << 2) + 1] << 8;
pixel |= row[(x << 2) + 2] << 16;
return pixel | row[(x << 2) + 3] << 24;
}
#endif /* __XCB_PIXEL_H__ */