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Fix potential glDrawPixels(GL_DEPTH_COMPONENT) crashes (bug 13915)

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Also, general clean-up of the Xlib-optimized glDraw/CopyPixels code.
This commit is contained in:
Brian
2008-02-16 09:56:54 -07:00
parent 3955bbc303
commit 15f0015df4
1 changed files with 166 additions and 99 deletions
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265
src/mesa/drivers/x11/xm_dd.c
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@@ -420,7 +420,42 @@ clear_buffers(GLcontext *ctx, GLbitfield buffers)
#ifndef XFree86Server
/* XXX this was never tested in the Xserver environment */
/* XXX these functions haven't been tested in the Xserver environment */
/**
* Check if we can do an optimized glDrawPixels into an 8R8G8B visual.
*/
static GLboolean
can_do_DrawPixels_8R8G8B(GLcontext *ctx, GLenum format, GLenum type)
{
if (format == GL_BGRA &&
type == GL_UNSIGNED_BYTE &&
ctx->DrawBuffer &&
ctx->DrawBuffer->Name == 0 &&
ctx->Pixel.ZoomX == 1.0 && /* no zooming */
ctx->Pixel.ZoomY == 1.0 &&
ctx->_ImageTransferState == 0 /* no color tables, scale/bias, etc */) {
const SWcontext *swrast = SWRAST_CONTEXT(ctx);
if (swrast->NewState)
_swrast_validate_derived( ctx );
if ((swrast->_RasterMask & ~CLIP_BIT) == 0) /* no blend, z-test, etc */ {
struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0];
if (rb) {
struct xmesa_renderbuffer *xrb = xmesa_renderbuffer(rb->Wrapped);
if (xrb &&
xrb->pixmap && /* drawing to pixmap or window */
xrb->Base.AlphaBits == 0) {
return GL_TRUE;
}
}
}
}
return GL_FALSE;
}
/**
* This function implements glDrawPixels() with an XPutImage call when
@@ -434,42 +469,16 @@ xmesa_DrawPixels_8R8G8B( GLcontext *ctx,
const struct gl_pixelstore_attrib *unpack,
const GLvoid *pixels )
{
const SWcontext *swrast = SWRAST_CONTEXT( ctx );
struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0];
struct xmesa_renderbuffer *xrb;
if (!rb)
return;
xrb = xmesa_renderbuffer(rb->Wrapped);
if (swrast->NewState)
_swrast_validate_derived( ctx );
if (ctx->DrawBuffer->Name == 0 &&
format == GL_BGRA &&
type == GL_UNSIGNED_BYTE &&
(swrast->_RasterMask & ~CLIP_BIT) == 0 && /* no blend, z-test, etc */
ctx->_ImageTransferState == 0 && /* no color tables, scale/bias, etc */
ctx->Pixel.ZoomX == 1.0 && /* no zooming */
ctx->Pixel.ZoomY == 1.0 &&
xrb->pixmap && /* drawing to pixmap or window */
xrb->Base.AlphaBits == 0)
{
const XMesaContext xmesa = XMESA_CONTEXT(ctx);
XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
XMesaDisplay *dpy = xmesa->xm_visual->display;
const XMesaGC gc = xmbuf->cleargc; /* effected by glColorMask */
if (can_do_DrawPixels_8R8G8B(ctx, format, type)) {
const SWcontext *swrast = SWRAST_CONTEXT( ctx );
struct gl_pixelstore_attrib clippedUnpack = *unpack;
int dstX = x;
int dstY = y;
int w = width;
int h = height;
struct gl_pixelstore_attrib clippedUnpack = *unpack;
ASSERT(xmesa->xm_visual->dithered_pf == PF_8R8G8B);
ASSERT(xmesa->xm_visual->undithered_pf == PF_8R8G8B);
ASSERT(dpy);
ASSERT(gc);
if (swrast->NewState)
_swrast_validate_derived( ctx );
if (unpack->BufferObj->Name) {
/* unpack from PBO */
@@ -494,14 +503,26 @@ xmesa_DrawPixels_8R8G8B( GLcontext *ctx,
}
if (_mesa_clip_drawpixels(ctx, &dstX, &dstY, &w, &h, &clippedUnpack)) {
const XMesaContext xmesa = XMESA_CONTEXT(ctx);
XMesaDisplay *dpy = xmesa->xm_visual->display;
XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
const XMesaGC gc = xmbuf->cleargc; /* effected by glColorMask */
struct xmesa_renderbuffer *xrb
= xmesa_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]->Wrapped);
const int srcX = clippedUnpack.SkipPixels;
const int srcY = clippedUnpack.SkipRows;
const int rowLength = clippedUnpack.RowLength;
XMesaImage ximage;
ASSERT(xmesa->xm_visual->dithered_pf == PF_8R8G8B);
ASSERT(xmesa->xm_visual->undithered_pf == PF_8R8G8B);
ASSERT(dpy);
ASSERT(gc);
/* This is a little tricky since all coordinates up to now have
* been in the OpenGL bottom-to-top orientation. X is top-to-bottom
* so we have to carefully compute the Y coordinates/addresses here.
*/
int srcX = clippedUnpack.SkipPixels;
int srcY = clippedUnpack.SkipRows;
int rowLength = clippedUnpack.RowLength;
XMesaImage ximage;
MEMSET(&ximage, 0, sizeof(XMesaImage));
ximage.width = width;
ximage.height = height;
@@ -512,9 +533,9 @@ xmesa_DrawPixels_8R8G8B( GLcontext *ctx,
ximage.bitmap_unit = 32;
ximage.bitmap_bit_order = LSBFirst;
ximage.bitmap_pad = 32;
ximage.depth = 24;
ximage.bytes_per_line = -rowLength * 4; /* negative to flip image */
ximage.depth = 32;
ximage.bits_per_pixel = 32;
ximage.bytes_per_line = -rowLength * 4; /* negative to flip image */
/* it seems we don't need to set the ximage.red/green/blue_mask fields */
/* flip Y axis for dest position */
dstY = YFLIP(xrb, dstY) - h + 1;
@@ -535,6 +556,41 @@ xmesa_DrawPixels_8R8G8B( GLcontext *ctx,
/**
* Check if we can do an optimized glDrawPixels into an 5R6G5B visual.
*/
static GLboolean
can_do_DrawPixels_5R6G5B(GLcontext *ctx, GLenum format, GLenum type)
{
if (format == GL_RGB &&
type == GL_UNSIGNED_SHORT_5_6_5 &&
!ctx->Color.DitherFlag && /* no dithering */
ctx->DrawBuffer &&
ctx->DrawBuffer->Name == 0 &&
ctx->Pixel.ZoomX == 1.0 && /* no zooming */
ctx->Pixel.ZoomY == 1.0 &&
ctx->_ImageTransferState == 0 /* no color tables, scale/bias, etc */) {
const SWcontext *swrast = SWRAST_CONTEXT(ctx);
if (swrast->NewState)
_swrast_validate_derived( ctx );
if ((swrast->_RasterMask & ~CLIP_BIT) == 0) /* no blend, z-test, etc */ {
struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0];
if (rb) {
struct xmesa_renderbuffer *xrb = xmesa_renderbuffer(rb->Wrapped);
if (xrb &&
xrb->pixmap && /* drawing to pixmap or window */
xrb->Base.AlphaBits == 0) {
return GL_TRUE;
}
}
}
}
return GL_FALSE;
}
/**
* This function implements glDrawPixels() with an XPutImage call when
* drawing to the front buffer (X Window drawable). The image format
@@ -548,39 +604,17 @@ xmesa_DrawPixels_5R6G5B( GLcontext *ctx,
const struct gl_pixelstore_attrib *unpack,
const GLvoid *pixels )
{
const XMesaContext xmesa = XMESA_CONTEXT(ctx);
const SWcontext *swrast = SWRAST_CONTEXT( ctx );
XMesaDisplay *dpy = xmesa->xm_visual->display;
XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
const XMesaGC gc = xmbuf->cleargc; /* effected by glColorMask */
struct xmesa_renderbuffer *xrb;
ASSERT(dpy);
ASSERT(gc);
ASSERT(xmesa->xm_visual->undithered_pf == PF_5R6G5B);
if (!ctx->DrawBuffer->_ColorDrawBuffers[0])
return;
xrb = xmesa_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]->Wrapped);
if (swrast->NewState)
_swrast_validate_derived( ctx );
if (xrb->pixmap && /* drawing to pixmap or window */
format == GL_RGB &&
type == GL_UNSIGNED_SHORT_5_6_5 &&
!ctx->Color.DitherFlag && /* no dithering */
(swrast->_RasterMask & ~CLIP_BIT) == 0 && /* no blend, z-test, etc */
ctx->_ImageTransferState == 0 && /* no color tables, scale/bias, etc */
ctx->Pixel.ZoomX == 1.0 && /* no zooming */
ctx->Pixel.ZoomY == 1.0) {
if (can_do_DrawPixels_5R6G5B(ctx, format, type)) {
const SWcontext *swrast = SWRAST_CONTEXT( ctx );
struct gl_pixelstore_attrib clippedUnpack = *unpack;
int dstX = x;
int dstY = y;
int w = width;
int h = height;
struct gl_pixelstore_attrib clippedUnpack = *unpack;
if (swrast->NewState)
_swrast_validate_derived( ctx );
if (unpack->BufferObj->Name) {
/* unpack from PBO */
GLubyte *buf;
@@ -604,14 +638,25 @@ xmesa_DrawPixels_5R6G5B( GLcontext *ctx,
}
if (_mesa_clip_drawpixels(ctx, &dstX, &dstY, &w, &h, &clippedUnpack)) {
const XMesaContext xmesa = XMESA_CONTEXT(ctx);
XMesaDisplay *dpy = xmesa->xm_visual->display;
XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
const XMesaGC gc = xmbuf->cleargc; /* effected by glColorMask */
struct xmesa_renderbuffer *xrb
= xmesa_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]->Wrapped);
const int srcX = clippedUnpack.SkipPixels;
const int srcY = clippedUnpack.SkipRows;
const int rowLength = clippedUnpack.RowLength;
XMesaImage ximage;
ASSERT(xmesa->xm_visual->undithered_pf == PF_5R6G5B);
ASSERT(dpy);
ASSERT(gc);
/* This is a little tricky since all coordinates up to now have
* been in the OpenGL bottom-to-top orientation. X is top-to-bottom
* so we have to carefully compute the Y coordinates/addresses here.
*/
int srcX = clippedUnpack.SkipPixels;
int srcY = clippedUnpack.SkipRows;
int rowLength = clippedUnpack.RowLength;
XMesaImage ximage;
MEMSET(&ximage, 0, sizeof(XMesaImage));
ximage.width = width;
ximage.height = height;
@@ -623,8 +668,8 @@ xmesa_DrawPixels_5R6G5B( GLcontext *ctx,
ximage.bitmap_bit_order = LSBFirst;
ximage.bitmap_pad = 16;
ximage.depth = 16;
ximage.bytes_per_line = -rowLength * 2; /* negative to flip image */
ximage.bits_per_pixel = 16;
ximage.bytes_per_line = -rowLength * 2; /* negative to flip image */
/* it seems we don't need to set the ximage.red/green/blue_mask fields */
/* flip Y axis for dest position */
dstY = YFLIP(xrb, dstY) - h + 1;
@@ -644,6 +689,42 @@ xmesa_DrawPixels_5R6G5B( GLcontext *ctx,
}
/**
* Determine if we can do an optimized glCopyPixels.
*/
static GLboolean
can_do_CopyPixels(GLcontext *ctx, GLenum type)
{
if (type == GL_COLOR &&
ctx->_ImageTransferState == 0 && /* no color tables, scale/bias, etc */
ctx->Pixel.ZoomX == 1.0 && /* no zooming */
ctx->Pixel.ZoomY == 1.0 &&
ctx->Color.DrawBuffer[0] == GL_FRONT && /* copy to front buf */
ctx->Pixel.ReadBuffer == GL_FRONT && /* copy from front buf */
ctx->ReadBuffer->_ColorReadBuffer &&
ctx->DrawBuffer->_ColorDrawBuffers[0]) {
const SWcontext *swrast = SWRAST_CONTEXT( ctx );
if (swrast->NewState)
_swrast_validate_derived( ctx );
if ((swrast->_RasterMask & ~CLIP_BIT) == 0x0 &&
ctx->ReadBuffer &&
ctx->ReadBuffer->_ColorReadBuffer &&
ctx->DrawBuffer &&
ctx->DrawBuffer->_ColorDrawBuffers[0]) {
struct xmesa_renderbuffer *srcXrb
= xmesa_renderbuffer(ctx->ReadBuffer->_ColorReadBuffer->Wrapped);
struct xmesa_renderbuffer *dstXrb
= xmesa_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]->Wrapped);
if (srcXrb->pixmap && dstXrb->pixmap) {
return GL_TRUE;
}
}
}
return GL_FALSE;
}
/**
* Implement glCopyPixels for the front color buffer (or back buffer Pixmap)
@@ -655,35 +736,19 @@ xmesa_CopyPixels( GLcontext *ctx,
GLint srcx, GLint srcy, GLsizei width, GLsizei height,
GLint destx, GLint desty, GLenum type )
{
const XMesaContext xmesa = XMESA_CONTEXT(ctx);
const SWcontext *swrast = SWRAST_CONTEXT( ctx );
XMesaDisplay *dpy = xmesa->xm_visual->display;
XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
const XMesaGC gc = xmbuf->cleargc; /* effected by glColorMask */
struct xmesa_renderbuffer *srcXrb, *dstXrb;
if (can_do_CopyPixels(ctx, type)) {
const XMesaContext xmesa = XMESA_CONTEXT(ctx);
XMesaDisplay *dpy = xmesa->xm_visual->display;
XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
const XMesaGC gc = xmbuf->cleargc; /* effected by glColorMask */
struct xmesa_renderbuffer *srcXrb
= xmesa_renderbuffer(ctx->ReadBuffer->_ColorReadBuffer->Wrapped);
struct xmesa_renderbuffer *dstXrb
= xmesa_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]->Wrapped);
if (!ctx->ReadBuffer->_ColorReadBuffer ||
!ctx->DrawBuffer->_ColorDrawBuffers[0])
return;
ASSERT(dpy);
ASSERT(gc);
ASSERT(dpy);
ASSERT(gc);
srcXrb = xmesa_renderbuffer(ctx->ReadBuffer->_ColorReadBuffer->Wrapped);
dstXrb = xmesa_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]->Wrapped);
if (swrast->NewState)
_swrast_validate_derived( ctx );
if (ctx->Color.DrawBuffer[0] == GL_FRONT &&
ctx->Pixel.ReadBuffer == GL_FRONT &&
srcXrb->pixmap &&
dstXrb->pixmap &&
type == GL_COLOR &&
(swrast->_RasterMask & ~CLIP_BIT) == 0 && /* no blend, z-test, etc */
ctx->_ImageTransferState == 0 && /* no color tables, scale/bias, etc */
ctx->Pixel.ZoomX == 1.0 && /* no zooming */
ctx->Pixel.ZoomY == 1.0) {
/* Note: we don't do any special clipping work here. We could,
* but X will do it for us.
*/
@@ -696,6 +761,7 @@ xmesa_CopyPixels( GLcontext *ctx,
_swrast_CopyPixels(ctx, srcx, srcy, width, height, destx, desty, type );
}
}
#endif /* XFree86Server */
@@ -1085,7 +1151,8 @@ xmesa_init_driver_functions( XMesaVisual xmvisual,
#ifndef XFree86Server
driver->CopyPixels = xmesa_CopyPixels;
if (xmvisual->undithered_pf == PF_8R8G8B &&
xmvisual->dithered_pf == PF_8R8G8B) {
xmvisual->dithered_pf == PF_8R8G8B &&
xmvisual->BitsPerPixel == 32) {
driver->DrawPixels = xmesa_DrawPixels_8R8G8B;
}
else if (xmvisual->undithered_pf == PF_5R6G5B) {