[PATCH] added comments
Bernhard Steidl
BernhardSteidl at gmx.de
Wed May 30 16:41:41 PDT 2007
- added lots of comments, discussed comments with ahuillet and refined comments
- replaced two constants with MACROs
- no changes to actual code
diff --git a/src/nv_video.c b/src/nv_video.c
index cf4f88d..d9ee700 100644
--- a/src/nv_video.c
+++ b/src/nv_video.c
@@ -25,6 +25,15 @@
#include "nv_include.h"
#include "nv_dma.h"
+/*
+2046 is the maximum image size in one dimension.
+- why 2046 and not 2048? a hardware filter needs a one pixel bound at every edge
+- in some color spaces w may be rounded up to multiple of 4 and may thus exceed the maximum.
+ What happens then?
+*/
+#define IMAGE_MAX_W 2046
+#define IMAGE_MAX_H 2046
+
#define OFF_DELAY 500 /* milliseconds */
#define FREE_DELAY 5000
@@ -74,7 +83,7 @@ static XF86VideoEncodingRec DummyEncoding =
{
0,
"XV_IMAGE",
- 2046, 2046,
+ IMAGE_MAX_W, IMAGE_MAX_H,
{1, 1}
};
@@ -140,6 +149,13 @@ static XF86ImageRec NVImages[NUM_IMAGES_ALL] =
XVIMAGE_RGB
};
+/**
+ * NVSetPortDefaults
+ * set attributes of port "pPriv" to complied-in (except for colorKey) defaults
+ *
+ * @param pScrnInfo screen to get the default colorKey from
+ * @param pPriv port to reset to defaults
+ */
static void
NVSetPortDefaults (ScrnInfoPtr pScrnInfo, NVPortPrivPtr pPriv)
{
@@ -155,9 +171,12 @@ NVSetPortDefaults (ScrnInfoPtr pScrnInfo, NVPortPrivPtr pPriv)
pPriv->iturbt_709 = FALSE;
}
-
+/**
+ * NVResetVideo
+ * writes the current attributes from the overlay port to the hardware
+ */
void
-NVResetVideo (ScrnInfoPtr pScrnInfo)
+NVResetVideo(ScrnInfoPtr pScrnInfo)
{
NVPtr pNv = NVPTR(pScrnInfo);
NVPortPrivPtr pPriv = GET_OVERLAY_PRIVATE(pNv);
@@ -184,8 +203,10 @@ NVResetVideo (ScrnInfoPtr pScrnInfo)
nvWriteVIDEO(pNv, NV_PVIDEO_COLOR_KEY, pPriv->colorKey);
}
-
-
+/**
+ * NVStopOverlay
+ * Tell the hardware to stop the overlay
+ */
static void
NVStopOverlay (ScrnInfoPtr pScrnInfo)
{
@@ -194,6 +215,30 @@ NVStopOverlay (ScrnInfoPtr pScrnInfo)
nvWriteVIDEO(pNv, NV_PVIDEO_STOP, 1);
}
+/**
+ * NVAllocateOverlayMemory
+ * allocates memory
+ *
+ * - why does the funciton have "Overlay" in its name? It does not
+ * have anything "Overlay"-specific in its function body and it is called by
+ * non-"Overlay"-specific functions.
+ * TODO: rename to something like NVAllocateVideoMemory or NVAllocateXvMemory
+ * - the function only (re-)allocates memory if it absolutely necessary,
+ * that is, if the requested size is larger than the current size. that means,
+ * that the size of allocated memory never shrinks, even if the requested
+ * does. from a performance point of view this is most likely the best
+ * alternative. but how often does the requested size of memory for video
+ * playback change? whenever video-size/scaling changes? probably not very
+ * often. so maybe sacrifice a tiny bit of performance (whenever the video is
+ * rescaled) and not waste (RAM-)resources?
+ * - the function makes assumptions about the XAA fb manager being used. isn't
+ * there a way to check? what aboaut EXA?
+ *
+ * @param pScrn screen which requests the memory
+ * @param mem pointer to previously allocated memory for reallocation
+ * @param size size of requested memory segment
+ * @return pointer to the allocated memory
+ */
static NVAllocRec *
NVAllocateOverlayMemory(ScrnInfoPtr pScrn, NVAllocRec *mem, int size)
{
@@ -206,7 +251,7 @@ NVAllocateOverlayMemory(ScrnInfoPtr pScrn, NVAllocRec *mem, int size)
size *= (pScrn->bitsPerPixel >> 3);
if(mem) {
- if(mem->size >= size)
+ if(mem->size >= size) // if(mem->size == size)
return mem;
NVFreeMemory(pNv, mem);
}
@@ -214,6 +259,13 @@ NVAllocateOverlayMemory(ScrnInfoPtr pScrn, NVAllocRec *mem, int size)
return NVAllocateMemory(pNv, NOUVEAU_MEM_FB, size); /* align 32? */
}
+/**
+ * NVFreeOverlayMemory
+ * frees memory held by the overlay port
+ * this function (unlike NVAllocateOverlayMemory) is "Overlay"-specific
+ *
+ * @param pScrnInfo screen whose overlay port wants to free memory
+ */
static void
NVFreeOverlayMemory(ScrnInfoPtr pScrnInfo)
{
@@ -226,7 +278,12 @@ NVFreeOverlayMemory(ScrnInfoPtr pScrnInfo)
}
}
-
+/**
+ * NVFreeBlitMemory
+ * frees memory held by the blit port
+ *
+ * @param pScrnInfo screen whose blit port wants to free memory
+ */
static void
NVFreeBlitMemory(ScrnInfoPtr pScrnInfo)
{
@@ -239,6 +296,11 @@ NVFreeBlitMemory(ScrnInfoPtr pScrnInfo)
}
}
+/**
+ * NVVideoTimerCallback
+ * callback function which perform cleanup tasks (stop overlay, free memory).
+ * within the driver it is only called once from NVBlockHandler in nv_driver.c
+ */
static void
NVVideoTimerCallback(ScrnInfoPtr pScrnInfo, Time currentTime)
{
@@ -291,6 +353,27 @@ NVVideoTimerCallback(ScrnInfoPtr pScrnInfo, Time currentTime)
pNv->VideoTimerCallback = needCallback ? NVVideoTimerCallback : NULL;
}
+/**
+ * NVPutOverlayImage
+ * program hardware to overlay image into front buffer
+ *
+ * @param pScrnInfo screen
+ * @param src_offset
+ * @param id colorspace of image
+ * @param src_pitch
+ * @param dstBox
+ * @param x1
+ * @param y1
+ * @param x2
+ * @param y2
+ * @param width
+ * @param height
+ * @param src_w
+ * @param src_h
+ * @param drw_w
+ * @param drw_h
+ * @param clipBoxes
+ */
static void
NVPutOverlayImage(ScrnInfoPtr pScrnInfo, int offset, int id,
int dstPitch, BoxPtr dstBox,
@@ -358,6 +441,30 @@ extern Bool exaPixmapIsOffscreen(PixmapPtr p);
extern void exaMoveInPixmap(PixmapPtr pPixmap);
#endif
+/**
+ * NVPutBlitImage
+ * uses the DMA controller of the GPU to blit
+ * (block transfer) image from an offscreen buffer into
+ * the color buffer
+ *
+ * @param pScrnInfo screen
+ * @param src_offset
+ * @param id colorspace of image
+ * @param src_pitch
+ * @param dstBox
+ * @param x1
+ * @param y1
+ * @param x2
+ * @param y2
+ * @param width
+ * @param height
+ * @param src_w
+ * @param src_h
+ * @param drw_w
+ * @param drw_h
+ * @param clipBoxes
+ * @param pDraw
+ */
static void
NVPutBlitImage(ScrnInfoPtr pScrnInfo, int src_offset, int id,
int src_pitch, BoxPtr dstBox,
@@ -530,11 +637,29 @@ NVStopOverlayVideo(ScrnInfoPtr pScrnInfo, pointer data, Bool Exit)
}
}
+/**
+ * NVStopBlitVideo
+ * TODO ?
+ */
static void
NVStopBlitVideo(ScrnInfoPtr pScrnInfo, pointer data, Bool Exit)
{
}
+/**
+ * NVSetOverlayPortAttribute
+ * sets the attribute "attribute" of port "data" to value "value"
+ * calls NVResetVideo(pScrnInfo) to apply changes to hardware
+ *
+ * @param pScrenInfo
+ * @param attribute attribute to set
+ * @param value value to which attribute is to be set
+ * @param data port from which the attribute is to be set
+ *
+ * @return Success, if setting is successful
+ * BadValue/BadMatch, if value/attribute are invalid
+ * @see NVResetVideo(ScrnInfoPtr pScrnInfo)
+ */
static int
NVSetOverlayPortAttribute(ScrnInfoPtr pScrnInfo, Atom attribute,
INT32 value, pointer data)
@@ -590,7 +715,15 @@ NVSetOverlayPortAttribute(ScrnInfoPtr pScrnInfo, Atom attribute,
return Success;
}
-
+/**
+ * NVGetOverlayPortAttribute
+ *
+ * @param pScrnInfo unused
+ * @param attribute attribute to be read
+ * @param value value of attribute will be stored in this pointer
+ * @param data port from which attribute will be read
+ * @return Success, if queried attribute exists
+ */
static int
NVGetOverlayPortAttribute(ScrnInfoPtr pScrnInfo, Atom attribute,
INT32 *value, pointer data)
@@ -619,6 +752,21 @@ NVGetOverlayPortAttribute(ScrnInfoPtr pScrnInfo, Atom attribute,
return Success;
}
+/**
+ * NVSetBlitPortAttribute
+ * sets the attribute "attribute" of port "data" to value "value"
+ * supported attributes:
+ * - xvSyncToVBlank (values: 0,1)
+ * - xvSetDefaults (values: NA; SyncToVBlank will be set, if hardware supports it)
+ *
+ * @param pScrenInfo
+ * @param attribute attribute to set
+ * @param value value to which attribute is to be set
+ * @param data port from which the attribute is to be set
+ *
+ * @return Success, if setting is successful
+ * BadValue/BadMatch, if value/attribute are invalid
+ */
static int
NVSetBlitPortAttribute(ScrnInfoPtr pScrnInfo, Atom attribute,
INT32 value, pointer data)
@@ -639,6 +787,17 @@ NVSetBlitPortAttribute(ScrnInfoPtr pScrnInfo, Atom attribute,
return Success;
}
+/**
+ * NVGetBlitPortAttribute
+ * reads the value of attribute "attribute" from port "data" into INT32 "*value"
+ * currently only one attribute supported: xvSyncToVBlank
+ *
+ * @param pScrnInfo unused
+ * @param attribute attribute to be read
+ * @param value value of attribute will be stored here
+ * @param data port from which attribute will be read
+ * @return Success, if queried attribute exists
+ */
static int
NVGetBlitPortAttribute(ScrnInfoPtr pScrnInfo, Atom attribute,
INT32 *value, pointer data)
@@ -654,8 +813,28 @@ NVGetBlitPortAttribute(ScrnInfoPtr pScrnInfo, Atom attribute,
}
-/*
+/**
* QueryBestSize
+ * used by client applications to ask the driver:
+ * how would you actually scale a video of dimensions
+ * vid_w, vid_h, if i wanted you to scale it to dimensions
+ * drw_w, drw_h?
+ * function stores actual scaling size in pointers p_w, p_h.
+ *
+ * - currently the image cannot be scaled to less than
+ * 1/8th of the original size in either dimension. why?
+ * - what happens if the client requests a scaling to a larger value than
+ * the hardware is capable of (IMAGE_MAX_W, IMAGE_MAX_H)?
+ *
+ * @param pScrnInfo unused
+ * @param motion unused
+ * @param vid_w width of source video
+ * @param vid_h height of source video
+ * @param drw_w desired scaled width as requested by client
+ * @param drw_h desired scaled height as requested by client
+ * @param p_w actual scaled width as the driver is capable of
+ * @param p_h actual scaled height as the driver is capable of
+ * @param data unused
*/
static void
NVQueryBestSize(ScrnInfoPtr pScrnInfo, Bool motion,
@@ -673,6 +852,22 @@ NVQueryBestSize(ScrnInfoPtr pScrnInfo, Bool motion,
*p_h = drw_h;
}
+/**
+ * NVCopyData420
+ * TODO: use DMA instead of CPU copy
+ * used by NVPutImage() function to copy (image)data from
+ * system RAM to VRAM and change data order.
+ *
+ * @param src1 source buffer (luma ?)
+ * @param src2 source buffer (chroma1 ?)
+ * @param src3 source buffer (chroma2 ?)
+ * @param dst1 destination buffer
+ * @param srcPitch pitch of src1
+ * @param srcPitch2 pitch of src2, src3
+ * @param dstPitch pitch of dst1
+ * @param h number of lines to copy
+ * @param w length of lines to copy
+ */
static void NVCopyData420(unsigned char *src1, unsigned char *src2,
unsigned char *src3, unsigned char *dst1,
int srcPitch, int srcPitch2,
@@ -690,7 +885,7 @@ static void NVCopyData420(unsigned char *src1, unsigned char *src2,
s1 = src1; s2 = src2; s3 = src3;
i = w;
- while (i > 4) {
+ while (i > 4) { // wouldn't it be better to write (i >= 4) ?
#if X_BYTE_ORDER == X_BIG_ENDIAN
dst[0] = (s1[0] << 24) | (s1[1] << 8) | (s3[0] << 16) | s2[0];
dst[1] = (s1[2] << 24) | (s1[3] << 8) | (s3[1] << 16) | s2[1];
@@ -725,7 +920,15 @@ static void NVCopyData420(unsigned char *src1, unsigned char *src2,
}
}
-
+/**
+ * NVMoveDWORDS
+ * TODO: use DMA instead of CPU copy
+ * copy "dwords" * 32 bits from "src" to "dest"
+ *
+ * @param dest destination pointer
+ * @param src source pointer
+ * @param dwords size (32bit units)
+ */
static void
NVMoveDWORDS(CARD32* dest, CARD32* src, int dwords)
{
@@ -753,6 +956,15 @@ NVMoveDWORDS(CARD32* dest, CARD32* src, int dwords)
}
#if X_BYTE_ORDER == X_BIG_ENDIAN
+/**
+ * NVMoveDWORDSSwapped
+ * TODO: use DMA instead of CPU copy
+ * copy "dwords" * 32 bits from "src" to "dest" on big endian plattforms
+ *
+ * @param dest destination pointer
+ * @param src source pointer
+ * @param dwords size (32bit units)
+ */
static void
NVMoveDWORDSSwapped(CARD32* dest, CARD8* src, int dwords)
{
@@ -763,6 +975,19 @@ NVMoveDWORDSSwapped(CARD32* dest, CARD8* src, int dwords)
}
#endif
+/**
+ * NVCopyData422
+ * TODO: use DMA instead of CPU copy
+ * used by NVPutImage() function to copy (image)data from
+ * system RAM to VRAM.
+ *
+ * @param src source buffer
+ * @param dst destination buffer
+ * @param srcPitch pitch of src
+ * @param dstPitch pitch of dst
+ * @param h number of lines to copy
+ * @param w length of lines to copy
+ */
static void
NVCopyData422(unsigned char *src, unsigned char *dst,
int srcPitch, int dstPitch,
@@ -776,6 +1001,19 @@ NVCopyData422(unsigned char *src, unsigned char *dst,
}
}
+/**
+ * NVCopyDataRGB
+ * TODO: use DMA instead of CPU copy
+ * used by NVPutImage() function to copy (image)data from
+ * system RAM to VRAM.
+ *
+ * @param src source buffer
+ * @param dst destination buffer
+ * @param srcPitch pitch of src
+ * @param dstPitch pitch of dst
+ * @param h number of lines to copy
+ * @param w length of lines to copy
+ */
static void
NVCopyDataRGB(unsigned char *src, unsigned char *dst,
int srcPitch, int dstPitch,
@@ -793,8 +1031,30 @@ NVCopyDataRGB(unsigned char *src, unsigned char *dst,
}
-/*
- * PutImage
+/**
+ * NVPutImage
+ * PutImage is "the" important function of the Xv extention.
+ * a client (e.g. video player) calls this function for every
+ * image (of the video) to be displayed. this function then
+ * scales and displays the image.
+ *
+ * @param pScrnInfo screen which hold the port where the image is put
+ * @param src_x
+ * @param src_y
+ * @param src_w
+ * @param src_h
+ * @param drw_x
+ * @param drw_y
+ * @param drw_w
+ * @param drw_h
+ * @param id colorspace of image
+ * @param buf pointer to buffer containing the source image
+ * @param width
+ * @param height
+ * @param Sync unused
+ * @param clipBoxes
+ * @param data pointer to port
+ * @param pDraw
*/
static int
NVPutImage(ScrnInfoPtr pScrnInfo, short src_x, short src_y,
@@ -863,7 +1123,10 @@ NVPutImage(ScrnInfoPtr pScrnInfo, short src_x, short src_y,
dstBox.y2 -= pScrnInfo->frameY0;
}
- bpp = pScrnInfo->bitsPerPixel >> 3;
+
+ /* determine required memory size */
+
+ bpp = pScrnInfo->bitsPerPixel >> 3; // bytes per pixel
switch(id) {
case FOURCC_YV12:
@@ -886,15 +1149,21 @@ NVPutImage(ScrnInfoPtr pScrnInfo, short src_x, short src_y,
default:
return BadImplementation;
}
+ /* dstPitch = number of bytes (used + padding) per row
+ * so dstPitch / bpp = number of pixels (used + padding) per row
+ * so newSize = number of pixels for which we have to allocate RAM */
newSize = height * dstPitch / bpp;
- if (pPriv->doubleBuffer)
- newSize <<= 1;
+ if (pPriv->doubleBuffer) // double buffering ...
+ newSize <<= 1; // ... means double the amount of RAM needed
+ /* here we allocate RAM for "newSize" pixels, the function will make
+ * automatically make this right amount of bytes */
pPriv->video_mem = NVAllocateOverlayMemory(pScrnInfo, pPriv->video_mem,
newSize);
if (!pPriv->video_mem)
return BadAlloc;
+ /* allocating finished */
offset = pPriv->video_mem->offset;
if (pPriv->doubleBuffer) {
@@ -1004,8 +1273,28 @@ NVPutImage(ScrnInfoPtr pScrnInfo, short src_x, short src_y,
return Success;
}
-/*
+
+/**
* QueryImageAttributes
+ *
+ * calculates
+ * - size (memory required to store image),
+ * - pitches,
+ * - offsets
+ * of image
+ * depending on colorspace (id) and dimensions (w,h) of image
+ * values of
+ * - w,
+ * - h
+ * may be adjusted as needed
+ *
+ * @param pScrnInfo unused
+ * @param id colorspace of image
+ * @param w pointer to width of image
+ * @param h pointer to height of image
+ * @param pitches pitches[i] = length of a scanline in plane[i]
+ * @param offsets offsets[i] = offset of plane i from the beginning of the image
+ * @return size of the memory required for the XvImage queried
*/
static int
NVQueryImageAttributes(ScrnInfoPtr pScrnInfo, int id,
@@ -1014,46 +1303,46 @@ NVQueryImageAttributes(ScrnInfoPtr pScrnInfo, int id,
{
int size, tmp;
- if (*w > 2046)
- *w = 2046;
- if (*h > 2046)
- *h = 2046;
+ if (*w > IMAGE_MAX_W)
+ *w = IMAGE_MAX_W;
+ if (*h > IMAGE_MAX_H)
+ *h = IMAGE_MAX_H;
- *w = (*w + 1) & ~1;
+ *w = (*w + 1) & ~1; // width rounded up to an even number
if (offsets)
offsets[0] = 0;
switch (id) {
case FOURCC_YV12:
case FOURCC_I420:
- *h = (*h + 1) & ~1;
- size = (*w + 3) & ~3;
+ *h = (*h + 1) & ~1; // height rounded up to an even number
+ size = (*w + 3) & ~3; // width rounded up to a multiple of 4
if (pitches)
- pitches[0] = size;
+ pitches[0] = size; // width rounded up to a multiple of 4
size *= *h;
if (offsets)
- offsets[1] = size;
- tmp = ((*w >> 1) + 3) & ~3;
+ offsets[1] = size; // number of pixels in "rounded up" image
+ tmp = ((*w >> 1) + 3) & ~3; // width/2 rounded up to a multiple of 4
if (pitches)
- pitches[1] = pitches[2] = tmp;
- tmp *= (*h >> 1);
- size += tmp;
+ pitches[1] = pitches[2] = tmp; // width/2 rounded up to a multiple of 4
+ tmp *= (*h >> 1); // 1/4*number of pixels in "rounded up" image
+ size += tmp; // 5/4*number of pixels in "rounded up" image
if (offsets)
- offsets[2] = size;
- size += tmp;
+ offsets[2] = size; // 5/4*number of pixels in "rounded up" image
+ size += tmp; // = 3/2*number of pixels in "rounded up" image
break;
case FOURCC_UYVY:
case FOURCC_YUY2:
- size = *w << 1;
+ size = *w << 1; // 2*width
if (pitches)
- pitches[0] = size;
- size *= *h;
+ pitches[0] = size; // 2*width
+ size *= *h; // 2*width*height
break;
case FOURCC_RGB:
- size = *w << 2;
+ size = *w << 2; // 4*width (32 bit per pixel)
if (pitches)
- pitches[0] = size;
- size *= *h;
+ pitches[0] = size; // 4*width
+ size *= *h; // 4*width*height
break;
default:
*w = *h = size = 0;
@@ -1080,7 +1369,7 @@ NVAllocSurface(ScrnInfoPtr pScrnInfo, int id,
if (pPriv->grabbedByV4L)
return BadAlloc;
- if ((w > 2046) || (h > 2046))
+ if ((w > IMAGE_MAX_W) || (h > IMAGE_MAX_H))
return BadValue;
w = (w + 1) & ~1;
@@ -1210,6 +1499,12 @@ NVDisplaySurface(XF86SurfacePtr surface,
return Success;
}
+/**
+ * NVSetupBlitVideo
+ * this function does all the work setting up a blit port
+ *
+ * @return blit port
+ */
static XF86VideoAdaptorPtr
NVSetupBlitVideo (ScreenPtr pScreen)
{
@@ -1272,6 +1567,13 @@ NVSetupBlitVideo (ScreenPtr pScreen)
return adapt;
}
+/**
+ * NV10SetupOverlayVideo
+ * this function does all the work setting up an overlay port
+ *
+ * @return overlay port
+ * @see NVResetVideo(ScrnInfoPtr pScrnInfo)
+ */
static XF86VideoAdaptorPtr
NV10SetupOverlayVideo(ScreenPtr pScreen)
{
@@ -1351,7 +1653,7 @@ XF86OffscreenImageRec NVOffscreenImages[2] = {
NVStopSurface,
NVGetSurfaceAttribute,
NVSetSurfaceAttribute,
- 2046, 2046,
+ IMAGE_MAX_W, IMAGE_MAX_H,
NUM_OVERLAY_ATTRIBUTES - 1,
&NVOverlayAttributes[1]
},
@@ -1364,7 +1666,7 @@ XF86OffscreenImageRec NVOffscreenImages[2] = {
NVStopSurface,
NVGetSurfaceAttribute,
NVSetSurfaceAttribute,
- 2046, 2046,
+ IMAGE_MAX_W, IMAGE_MAX_H,
NUM_OVERLAY_ATTRIBUTES - 1,
&NVOverlayAttributes[1]
}
@@ -1376,6 +1678,15 @@ NVInitOffscreenImages (ScreenPtr pScreen)
xf86XVRegisterOffscreenImages(pScreen, NVOffscreenImages, 2);
}
+/**
+ * NVChipsetHasOverlay
+ *
+ * newer chips don't support overlay anymore.
+ * overlay feature is emulated via textures.
+ *
+ * @param pNv
+ * @return true, if chipset supports overlay
+ */
static Bool
NVChipsetHasOverlay(NVPtr pNv)
{
@@ -1395,6 +1706,16 @@ NVChipsetHasOverlay(NVPtr pNv)
return FALSE;
}
+/**
+ * NVSetupOverlayVideo
+ * check if chipset supports Overlay and CompositeExtension is disabled.
+ * if so, setup overlay port
+ *
+ * @return overlay port
+ * @see NVChipsetHasOverlay(NVPtr pNv)
+ * @see NV10SetupOverlayVideo(ScreenPtr pScreen)
+ * @see NVInitOffscreenImages(ScreenPtr pScreen)
+ */
static XF86VideoAdaptorPtr
NVSetupOverlayVideo(ScreenPtr pScreen)
{
@@ -1423,6 +1744,15 @@ NVSetupOverlayVideo(ScreenPtr pScreen)
return overlayAdaptor;
}
+/**
+ * NVInitVideo
+ * tries to initialize one new overlay port and one new blit port
+ * and add them to the list of ports on screen "pScreen".
+ *
+ * @param pScreen
+ * @see NVSetupOverlayVideo(ScreenPtr pScreen)
+ * @see NVSetupBlitVideo(ScreenPtr pScreen)
+ */
void NVInitVideo (ScreenPtr pScreen)
{
ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
--
1.5.0.7
--Multipart=_Thu__31_May_2007_01_51_20_+0200_VhEFSIFhCBVjMJ8F--
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