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authorUlrich Sibiller <uli42@gmx.de>2019-10-23 00:12:48 +0200
committerUlrich Sibiller <uli42@gmx.de>2020-01-05 22:37:36 +0100
commit9b1e29937c39c23a9db6bc1c3661cb2cf2e50671 (patch)
treec8c291ee002383f93d0055a749b0a8f02bb0f14a
parent24cb46d24f98f27d0020aae1b0651407947c4d45 (diff)
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Image.c: reformat comments
-rw-r--r--nx-X11/programs/Xserver/hw/nxagent/Image.c349
1 files changed, 149 insertions, 200 deletions
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Image.c b/nx-X11/programs/Xserver/hw/nxagent/Image.c
index 6c239012b..890706ba5 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Image.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Image.c
@@ -59,9 +59,8 @@
#undef DUMP
/*
- * Don't pack the images having a width, a
- * height or a data size smaller or equal
- * to these thresholds.
+ * Don't pack the images having a width, a height or a data size
+ * smaller or equal to these thresholds.
*/
#define IMAGE_PACK_WIDTH 2
@@ -69,16 +68,14 @@
#define IMAGE_PACK_LENGTH 512
/*
- * Compress the image with a lossless encoder
- * if the percentage of discrete pixels in the
- * image is below this threshold.
+ * Compress the image with a lossless encoder if the percentage of
+ * discrete pixels in the image is below this threshold.
*/
#define IMAGE_UNIQUE_RATIO 10
/*
- * Preferred pack and split parameters we
- * got from the NX transport.
+ * Preferred pack and split parameters we got from the NX transport.
*/
int nxagentPackLossless = -1;
@@ -94,8 +91,8 @@ int nxagentAlphaEnabled = 0;
int nxagentAlphaCompat = 0;
/*
- * Used to reformat image when connecting to
- * displays having different byte order.
+ * Used to reformat image when connecting to displays having different
+ * byte order.
*/
extern void nxagentBitOrderInvert(unsigned char *, int);
@@ -110,8 +107,7 @@ extern void nxagentFourByteSwap(register unsigned char *, register int);
static VisualID nxagentUnpackVisualId[MAX_CONNECTIONS];
/*
- * Store the last alpha data set for the
- * client.
+ * Store the last alpha data set for the client.
*/
typedef struct _UnpackAlpha
@@ -126,9 +122,8 @@ typedef UnpackAlphaRec *UnpackAlphaPtr;
static UnpackAlphaPtr nxagentUnpackAlpha[MAX_CONNECTIONS];
/*
- * Encode the imade alpha channel by using
- * a specific encoding, separating it from
- * the rest of the RGB data.
+ * Encode the imade alpha channel by using a specific encoding,
+ * separating it from the rest of the RGB data.
*/
static char *nxagentImageAlpha(XImage *ximage);
@@ -141,10 +136,9 @@ static void nxagentSetUnpackAlpha(DrawablePtr pDrawable, XImage *pImage, ClientP
static char *nxagentImageCopy(XImage *source, XImage *destination);
/*
- * Return true if the image can be cached.
- * Don't cache the images packed with the
- * bitmap method as the encoding is little
- * more expensive than a copy.
+ * Return true if the image can be cached. Don't cache the images
+ * packed with the bitmap method as the encoding is little more
+ * expensive than a copy.
*/
#define nxagentNeedCache(image, method) \
@@ -152,10 +146,8 @@ static char *nxagentImageCopy(XImage *source, XImage *destination);
((method) != PACK_BITMAP_16M_COLORS)
/*
- * With the bitmap encoding, if the image
- * is 32 bits-per-pixel the 4th byte is not
- * transmitted, so we don't need to clean
- * the image.
+ * With the bitmap encoding, if the image is 32 bits-per-pixel the 4th
+ * byte is not transmitted, so we don't need to clean the image.
*/
#define nxagentNeedClean(image, method) \
@@ -188,11 +180,10 @@ ImageStatisticsRec nxagentImageStatistics;
int nxagentImageReformat(char *base, int nbytes, int bpp, int order)
{
/*
- * This is used whenever we need to swap the image data.
- * If we got an image from an X server having a different
- * endianness, we will need to reformat the image to match
- * our own image-order so that ProcGetImage can return
- * the expected format to the client.
+ * This is used whenever we need to swap the image data. If we got
+ * an image from an X server having a different endianness, we will
+ * need to reformat the image to match our own image-order so that
+ * ProcGetImage can return the expected format to the client.
*/
switch (bpp)
@@ -298,10 +289,9 @@ int nxagentImagePad(int width, int format, int leftPad, int depth)
}
/*
- * Only copy the data, not the structure.
- * The data pointed by the destination is
- * lost. Used to clone two images that
- * point to the same data.
+ * Only copy the data, not the structure. The data pointed by the
+ * destination is lost. Used to clone two images that point to the
+ * same data.
*/
char *nxagentImageCopy(XImage *source, XImage *destination)
@@ -344,8 +334,7 @@ char *nxagentImageAlpha(XImage *image)
}
/*
- * The image is supposed to be in
- * server order.
+ * The image is supposed to be in server order.
*/
int offset = (image -> byte_order == MSBFirst) ? 0 : 3;
@@ -364,8 +353,7 @@ char *nxagentImageAlpha(XImage *image)
}
/*
- * Write down the image cache statistics
- * to the buffer.
+ * Write down the image cache statistics to the buffer.
*/
void nxagentImageStatisticsHandler(char **buffer, int type)
@@ -381,9 +369,8 @@ FIXME: Agent cache statistics have to be implemented.
}
/*
- * This should be called only for drawables
- * having a depth of 32. In the other cases,
- * it would only generate useless traffic.
+ * This should be called only for drawables having a depth of 32. In
+ * the other cases, it would only generate useless traffic.
*/
void nxagentSetUnpackAlpha(DrawablePtr pDrawable, XImage *pImage, ClientPtr pClient)
@@ -404,16 +391,15 @@ void nxagentSetUnpackAlpha(DrawablePtr pDrawable, XImage *pImage, ClientPtr pCli
}
/*
- * If we are synchronizing the drawable, discard
- * any unpack alpha stored for the client. The
- * alpha data, in fact, may be still traveling
- * and so we either wait until the end of the
- * split or send a fresh copy.
+ * If we are synchronizing the drawable, discard any unpack alpha
+ * stored for the client. The alpha data, in fact, may be still
+ * traveling and so we either wait until the end of the split or
+ * send a fresh copy.
*/
/*
-FIXME: Here the split trap is always set and so the caching of
- the alpha channel is useless. I remember we set the trap
- because of the cursor but why is it always set now?
+FIXME: Here the split trap is always set and so the caching of the
+ alpha channel is useless. I remember we set the trap because of
+ the cursor but why is it always set now?
*/
#ifdef DEBUG
fprintf(stderr, "nxagentSetUnpackAlpha: Checking alpha channel for client [%d] with trap [%d].\n",
@@ -431,9 +417,8 @@ FIXME: Here the split trap is always set and so the caching of
#endif
/*
- * Check if we are connected to a newer proxy
- * version and so can send the alpha data in
- * compressed form.
+ * Check if we are connected to a newer proxy version and so can
+ * send the alpha data in compressed form.
*/
if (nxagentAlphaCompat == 0)
@@ -480,8 +465,7 @@ FIXME: Here the split trap is always set and so the caching of
}
/*
- * The NX agent's implementation of the
- * X server's image functions.
+ * The NX agent's implementation of the X server's image functions.
*/
void nxagentPutImage(DrawablePtr pDrawable, GCPtr pGC, int depth,
@@ -502,9 +486,8 @@ void nxagentPutImage(DrawablePtr pDrawable, GCPtr pGC, int depth,
#endif
/*
- * If the display is down and there is not an
- * nxagent attached, sleep for a while but
- * still give a chance to the client to write
+ * If the display is down and there is not an nxagent attached,
+ * sleep for a while but still give a chance to the client to write
* to the framebuffer.
*/
@@ -527,11 +510,11 @@ void nxagentPutImage(DrawablePtr pDrawable, GCPtr pGC, int depth,
}
/*
- * This is of little use because clients usually write
- * to windows only after an expose event, and, in the
- * rare case they use a direct put image to the window
- * (for a media player it should be a necessity), they
- * are likely to monitor the visibility of the window.
+ * This is of little use because clients usually write to windows
+ * only after an expose event, and, in the rare case they use a
+ * direct put image to the window (for a media player it should be a
+ * necessity), they are likely to monitor the visibility of the
+ * window.
*/
if (nxagentOption(IgnoreVisibility) == 0 && pDrawable -> type == DRAWABLE_WINDOW &&
@@ -548,9 +531,8 @@ void nxagentPutImage(DrawablePtr pDrawable, GCPtr pGC, int depth,
}
/*
- * This is more interesting. Check if the operation
- * will produce a visible result based on the clip
- * list of the window and the GC.
+ * This is more interesting. Check if the operation will produce a
+ * visible result based on the clip list of the window and the GC.
*/
pRegion = nxagentCreateRegion(pDrawable, pGC, dstX, dstY, dstWidth, dstHeight);
@@ -607,9 +589,8 @@ FIXME: Should use these.
}
/*
- * We are going to realize the operation
- * on the real display. Let's check if
- * the link is down.
+ * We are going to realize the operation on the real display. Let's
+ * check if the link is down.
*/
if (NXDisplayError(nxagentDisplay) == 1)
@@ -618,13 +599,11 @@ FIXME: Should use these.
}
/*
- * Mark the region as corrupted and skip the operation
- * if we went out of bandwidth. The drawable will be
- * synchronized at later time. Don't do that if the
- * image is likely to be a shape or a clip mask, if we
- * are here because we are actually synchronizing the
- * drawable or if the drawable's corrupted region is
- * over-age.
+ * Mark the region as corrupted and skip the operation if we went
+ * out of bandwidth. The drawable will be synchronized at later
+ * time. Don't do that if the image is likely to be a shape or a
+ * clip mask, if we are here because we are actually synchronizing
+ * the drawable or if the drawable's corrupted region is over-age.
*/
if (NXAGENT_SHOULD_DEFER_PUTIMAGE(pDrawable))
@@ -676,8 +655,7 @@ FIXME: Should use these.
#endif
/*
- * Check whether we need to enclose the
- * image in a split sequence.
+ * Check whether we need to enclose the image in a split sequence.
*/
/*
FIXME: Should we disable the split with link LAN?
@@ -689,12 +667,11 @@ FIXME: Should we disable the split with link LAN?
split = (nxagentOption(Streaming) == 1 &&
nxagentOption(LinkType) != LINK_TYPE_NONE
/*
-FIXME: Do we stream the images from GLX or Xv? If we do that,
- we should also write on the frame buffer, including the
- images put on windows, to be able to reconstruct the
- region that is out of sync. Surely we should not try to
- cache the GLX and Xv images in memory or save them in
- the image cache on disk.
+FIXME: Do we stream the images from GLX or Xv? If we do that, we
+ should also write on the frame buffer, including the images put
+ on windows, to be able to reconstruct the region that is out of
+ sync. Surely we should not try to cache the GLX and Xv images
+ in memory or save them in the image cache on disk.
*/
/*
FIXME: Temporarily stream the GLX data.
@@ -705,8 +682,7 @@ FIXME: Temporarily stream the GLX data.
);
/*
- * Never split images whose depth
- * is less than 15.
+ * Never split images whose depth is less than 15.
*/
if (split == 1 && (nxagentSplitTrap == 1 || depth < 15))
@@ -750,9 +726,8 @@ FIXME: Temporarily stream the GLX data.
#endif
/*
- * If the image was originated by a GLX
- * or Xvideo request, temporarily disable
- * the use of the cache.
+ * If the image was originated by a GLX or Xvideo request,
+ * temporarily disable the use of the cache.
*/
if (nxagentOption(LinkType) != LINK_TYPE_NONE &&
@@ -768,17 +743,15 @@ FIXME: Temporarily stream the GLX data.
}
/*
- * Enclose the next messages in a split
- * sequence. The proxy will tell us if
- * the split took place.
+ * Enclose the next messages in a split sequence. The proxy will
+ * tell us if the split took place.
*/
if (split == 1)
{
/*
- * If the drawable is already being split,
- * expand the region. Currently drawables
- * can't have more than a single split
+ * If the drawable is already being split, expand the
+ * region. Currently drawables can't have more than a single split
* region.
*/
@@ -789,9 +762,8 @@ FIXME: Temporarily stream the GLX data.
(void *) pDrawable);
#endif
/*
-FIXME: Should probably intersect the region with
- the region being split to also invalidate
- the commits.
+FIXME: Should probably intersect the region with the region being
+ split to also invalidate the commits.
*/
nxagentMarkCorruptedRegion(pDrawable, pRegion);
@@ -800,9 +772,8 @@ FIXME: Should probably intersect the region with
else
{
/*
- * Assign a new resource to the drawable.
- * Will also assign the GC to use for the
- * operation.
+ * Assign a new resource to the drawable. Will also assign the
+ * GC to use for the operation.
*/
resource = nxagentCreateSplit(pDrawable, &pGC);
@@ -824,12 +795,11 @@ FIXME: Should probably intersect the region with
NXEndSplit(nxagentDisplay, resource);
/*
- * Now we need to check if all the messages went
- * straight through the output stream or any of
- * them required a split. If no split will take
- * place, we will remove the association with the
- * drawable and release the resource at the time
- * we will handle the no-split event.
+ * Now we need to check if all the messages went straight through
+ * the output stream or any of them required a split. If no split
+ * will take place, we will remove the association with the
+ * drawable and release the resource at the time we will handle
+ * the no-split event.
*/
split = nxagentWaitSplitEvent(resource);
@@ -843,10 +813,9 @@ FIXME: Should probably intersect the region with
#endif
/*
- * Marking the corrupted region we will check
- * if the region intersects the split region,
- * therefore the split region must be added
- * later.
+ * Marking the corrupted region we will check if the region
+ * intersects the split region, therefore the split region must
+ * be added later.
*/
nxagentMarkCorruptedRegion(pDrawable, pRegion);
@@ -872,9 +841,8 @@ FIXME: Should probably intersect the region with
if (nxagentDrawableStatus(pDrawable) == NotSynchronized)
{
/*
- * We just covered the drawable with
- * a solid image. We can consider the
- * overlapping region as synchronized.
+ * We just covered the drawable with a solid image. We can
+ * consider the overlapping region as synchronized.
*/
#ifdef TEST
@@ -919,8 +887,8 @@ void nxagentRealizeImage(DrawablePtr pDrawable, GCPtr pGC, int depth,
int totalHeight;
/*
- * NXPutPackedImage is longer than PutPackedImage
- * so that we subtract the bigger one to be sure.
+ * NXPutPackedImage is longer than PutPackedImage so that we
+ * subtract the bigger one to be sure.
*/
const int subSize = (MAX_REQUEST_SIZE << 2) - sizeof(xNXPutPackedImageReq);
@@ -1085,13 +1053,13 @@ void nxagentPutSubImage(DrawablePtr pDrawable, GCPtr pGC, int depth,
/*
* XCreateImage is the place where the leftPad should be passed.
- * The image data is received from our client unmodified. In
- * theory what we would need to do is just creating an appropri-
- * ate XImage structure based on the incoming data and let Xlib
- * do the rest. Probably we don't have to pass leftPad again in
- * the src_x of XPutImage otherwise the src_x would make Xlib
- * to take into account the xoffset field twice. Unfortunately
- * passing the leftPad doesn't work.
+ * The image data is received from our client unmodified. In theory
+ * what we would need to do is just creating an appropriate XImage
+ * structure based on the incoming data and let Xlib do the
+ * rest. Probably we don't have to pass leftPad again in the src_x
+ * of XPutImage otherwise the src_x would make Xlib to take into
+ * account the xoffset field twice. Unfortunately passing the
+ * leftPad doesn't work.
*
* plainImage = XCreateImage(nxagentDisplay, pVisual,
* depth, format, leftPad, data,
@@ -1145,10 +1113,9 @@ FIXME: Should use an unpack resource here.
#endif
/*
- * We got the image data from the X client or
- * from the frame-buffer with our own endianness.
- * Byte swap the image data if the display has
- * a different endianness than our own.
+ * We got the image data from the X client or from the frame-buffer
+ * with our own endianness. Byte swap the image data if the display
+ * has a different endianness than our own.
*/
if (nxagentImageNormalize(plainImage) != 0)
@@ -1165,10 +1132,9 @@ FIXME: Should use an unpack resource here.
#endif
/*
- * Check if the user requested to pack the
- * image but don't pack it if we are not
- * connected to a proxy or if the depth is
- * less than 15 bpp.
+ * Check if the user requested to pack the image but don't pack it
+ * if we are not connected to a proxy or if the depth is less than
+ * 15 bpp.
*/
pack = (nxagentOption(LinkType) != LINK_TYPE_NONE &&
@@ -1179,9 +1145,8 @@ FIXME: Should use an unpack resource here.
if (pack == 1 && lossless == 0)
{
/*
- * Force the image to be sent as a plain
- * bitmap if we don't have any lossless
- * encoder available.
+ * Force the image to be sent as a plain bitmap if we don't have
+ * any lossless encoder available.
*/
if (w <= IMAGE_PACK_WIDTH || h <= IMAGE_PACK_HEIGHT ||
@@ -1220,8 +1185,8 @@ FIXME: Should use an unpack resource here.
if (pack == 1)
{
/*
- * Set the geometry and alpha channel
- * to be used for the unpacked image.
+ * Set the geometry and alpha channel to be used for the unpacked
+ * image.
*/
if (nxagentUnpackVisualId[client -> index] != pVisual -> visualid)
@@ -1237,9 +1202,8 @@ FIXME: Should use an unpack resource here.
}
/*
- * Check if the image is supposed to carry
- * the alpha data in the fourth byte and,
- * if so, send the alpha channel using the
+ * Check if the image is supposed to carry the alpha data in the
+ * fourth byte and, if so, send the alpha channel using the
* specific encoding.
*/
@@ -1249,46 +1213,43 @@ FIXME: Should use an unpack resource here.
}
/*
- * If the image doesn't come from the XVideo or the
- * GLX extension try to locate it in the cache. The
- * case of the lossless trap is also special, as we
- * want to eventually encode the image again using
- * a lossless compression.
+ * If the image doesn't come from the XVideo or the GLX extension
+ * try to locate it in the cache. The case of the lossless trap is
+ * also special, as we want to eventually encode the image again
+ * using a lossless compression.
*/
/*
-FIXME: Should try to locate the image anyway, if the lossless
- trap is set, and if the image was encoded by a lossy
- compressor, roll back the changes and encode the image
- again using the preferred method.
+FIXME: Should try to locate the image anyway, if the lossless trap is
+ set, and if the image was encoded by a lossy compressor, roll
+ back the changes and encode the image again using the preferred
+ method.
*/
if (nxagentNeedCache(plainImage, packMethod) &&
nxagentGlxTrap == 0 && nxagentXvTrap == 0 &&
nxagentLosslessTrap == 0 && NXImageCacheSize > 0)
{
/*
- * Be sure that the padding bits are
- * cleaned before calculating the MD5
- * checksum.
+ * Be sure that the padding bits are cleaned before calculating
+ * the MD5 checksum.
*/
/*
FIXME: There should be a callback registered by the agent that
- provides a statistics report, in text format, telling
- for example how many images were searched in the cache,
- how many were found, how many drawables are to be synch-
- ronized, etc. This statistics report would be included
- by the proxy in its stat output.
+ provides a statistics report, in text format, telling for
+ example how many images were searched in the cache, how many
+ were found, how many drawables are to be synchronized,
+ etc. This statistics report would be included by the proxy in
+ its stat output.
*/
clean = 1;
NXCleanImage(plainImage);
/*
- * Will return a pointer to the image and checksum
- * taken from the cache, if found. If the image is
- * not found, the function returns a null image and
- * a pointer to the calculated checksum. It is up
- * to the application to free the memory. We will
- * use the checksum to add the image in the cache.
+ * Will return a pointer to the image and checksum taken from
+ * the cache, if found. If the image is not found, the function
+ * returns a null image and a pointer to the calculated
+ * checksum. It is up to the application to free the memory. We
+ * will use the checksum to add the image in the cache.
*/
packedImage = NXCacheFindImage(plainImage, &packMethod, &packedChecksum);
@@ -1325,9 +1286,8 @@ FIXME: There should be a callback registered by the agent that
}
/*
- * If a specific encoder was not mandated,
- * try to guess if a lossless encoder will
- * compress better.
+ * If a specific encoder was not mandated, try to guess if a
+ * lossless encoder will compress better.
*/
if (lossless == 0 && nxagentOption(Adaptive) == 1)
@@ -1355,8 +1315,7 @@ FIXME: There should be a callback registered by the agent that
}
/*
- * Encode the image using the selected
- * pack method.
+ * Encode the image using the selected pack method.
*/
if (packMethod == PACK_RLE_16M_COLORS ||
@@ -1364,13 +1323,11 @@ FIXME: There should be a callback registered by the agent that
packMethod == PACK_BITMAP_16M_COLORS)
{
/*
- * Cleanup the image if we didn't do that yet.
- * We assume that the JPEG and PNG compression
- * methods will actually ignore the padding
- * bytes. In other words, bitmap images prod-
- * ucing the same visual output should produce
- * compressed images that are bitwise the same
- * regardless the padding bits.
+ * Cleanup the image if we didn't do that yet. We assume that
+ * the JPEG and PNG compression methods will actually ignore the
+ * padding bytes. In other words, bitmap images producing the
+ * same visual output should produce compressed images that are
+ * bitwise the same regardless the padding bits.
*/
if (clean == 0)
@@ -1386,12 +1343,10 @@ FIXME: There should be a callback registered by the agent that
switch (packMethod)
{
/*
- * If nothing is done by the bitmap encoder,
- * it saves an allocation and a memory copy
- * by setting the data field of the packed
- * image to the original data. We need to
- * check this at the time we will free the
- * packed image.
+ * If nothing is done by the bitmap encoder, it saves an
+ * allocation and a memory copy by setting the data field of
+ * the packed image to the original data. We need to check
+ * this at the time we will free the packed image.
*/
case PACK_BITMAP_16M_COLORS:
@@ -1433,8 +1388,8 @@ FIXME: There should be a callback registered by the agent that
}
/*
- * If we didn't produce a valid packed
- * image, send the image as a X bitmap.
+ * If we didn't produce a valid packed image, send the image as a X
+ * bitmap.
*/
if (packedImage != NULL)
@@ -1453,10 +1408,8 @@ FIXME: There should be a callback registered by the agent that
0, 0, x, y, w, h);
/*
- * Add the image only if we have a valid
- * checksum. This is the case only if we
- * originally tried to find the image in
- * cache.
+ * Add the image only if we have a valid checksum. This is the
+ * case only if we originally tried to find the image in cache.
*/
if (NXImageCacheSize > 0 && packedChecksum != NULL)
@@ -1467,9 +1420,8 @@ FIXME: There should be a callback registered by the agent that
#endif
/*
- * Check if both the plain and the packed
- * image point to the same data. In this
- * case we need a copy.
+ * Check if both the plain and the packed image point to the
+ * same data. In this case we need a copy.
*/
if (packedImage -> data == plainImage -> data &&
@@ -1490,19 +1442,17 @@ FIXME: There should be a callback registered by the agent that
else
{
/*
- * Clean the image to help the proxy to match
- * the checksum in its cache. Do that only if
- * the differential compression is enabled and
- * if the image is not supposed to carry the
- * alpha data in the fourth byte of the pixel.
+ * Clean the image to help the proxy to match the checksum in its
+ * cache. Do that only if the differential compression is enabled
+ * and if the image is not supposed to carry the alpha data in the
+ * fourth byte of the pixel.
*/
/*
FIXME: If we failed to encode the image by any of the available
- methods, for example if we couldn't allocate memory, we
- may need to ripristinate the alpha channel, that in the
- meanwhile was sent in the unpack alpha message. This can
- be done here, if the clean flag is true and we are going
- to send a plain image.
+ methods, for example if we couldn't allocate memory, we may
+ need to ripristinate the alpha channel, that in the meanwhile
+ was sent in the unpack alpha message. This can be done here, if
+ the clean flag is true and we are going to send a plain image.
*/
if (clean == 0)
{
@@ -1596,10 +1546,9 @@ void nxagentGetImage(DrawablePtr pDrawable, int x, int y, int w, int h,
}
/*
- * We have to reset the visual cache before
- * connecting to another display, so that a
- * new unpack geometry can be communicated
- * to the new proxy.
+ * We have to reset the visual cache before connecting to another
+ * display, so that a new unpack geometry can be communicated to the
+ * new proxy.
*/
void nxagentResetVisualCache(void)