-/* $Id: s_stencil.c,v 1.14 2002/01/08 14:56:51 brianp Exp $ */
+/* $Id: s_stencil.c,v 1.29 2003/03/25 02:23:47 brianp Exp $ */
/*
* Mesa 3-D graphics library
#include "glheader.h"
#include "context.h"
#include "macros.h"
-#include "mem.h"
+#include "imports.h"
#include "s_context.h"
#include "s_depth.h"
-#include "s_pb.h"
#include "s_stencil.h"
-
-
/* Stencil Logic:
IF stencil test fails THEN
*/
-
-
/*
* Return the address of a stencil buffer value given the window coords:
*/
-/*
+/**
* Apply the given stencil operator to the array of stencil values.
* Don't touch stencil[i] if mask[i] is zero.
* Input: n - size of stencil array
* oper - the stencil buffer operator
+ * face - 0 or 1 for front or back face operation
* stencil - array of stencil values
* mask - array [n] of flag: 1=apply operator, 0=don't apply operator
* Output: stencil - modified values
*/
-static void apply_stencil_op( const GLcontext *ctx, GLenum oper,
- GLuint n, GLstencil stencil[],
- const GLubyte mask[] )
+static void
+apply_stencil_op( const GLcontext *ctx, GLenum oper, GLuint face,
+ GLuint n, GLstencil stencil[], const GLubyte mask[] )
{
- const GLstencil ref = ctx->Stencil.Ref;
- const GLstencil wrtmask = ctx->Stencil.WriteMask;
- const GLstencil invmask = (GLstencil) (~ctx->Stencil.WriteMask);
+ const GLstencil ref = ctx->Stencil.Ref[face];
+ const GLstencil wrtmask = ctx->Stencil.WriteMask[face];
+ const GLstencil invmask = (GLstencil) (~wrtmask);
GLuint i;
switch (oper) {
-/*
+/**
* Apply stencil test to an array of stencil values (before depth buffering).
- * Input: n - number of pixels in the array
+ * Input: face - 0 or 1 for front or back-face polygons
+ * n - number of pixels in the array
* stencil - array of [n] stencil values
* mask - array [n] of flag: 0=skip the pixel, 1=stencil the pixel
* Output: mask - pixels which fail the stencil test will have their
* Return: GL_FALSE = all pixels failed, GL_TRUE = zero or more pixels passed.
*/
static GLboolean
-do_stencil_test( GLcontext *ctx, GLuint n, GLstencil stencil[],
+do_stencil_test( GLcontext *ctx, GLuint face, GLuint n, GLstencil stencil[],
GLubyte mask[] )
{
- GLubyte fail[PB_SIZE];
+ GLubyte fail[MAX_WIDTH];
GLboolean allfail = GL_FALSE;
GLuint i;
GLstencil r, s;
+ const GLuint valueMask = ctx->Stencil.ValueMask[face];
- ASSERT(n <= PB_SIZE);
+ ASSERT(n <= MAX_WIDTH);
/*
* Perform stencil test. The results of this operation are stored
* the stencil fail operator is not to be applied
* ENDIF
*/
- switch (ctx->Stencil.Function) {
+ switch (ctx->Stencil.Function[face]) {
case GL_NEVER:
- /* always fail */
+ /* never pass; always fail */
for (i=0;i<n;i++) {
if (mask[i]) {
mask[i] = 0;
allfail = GL_TRUE;
break;
case GL_LESS:
- r = (GLstencil) (ctx->Stencil.Ref & ctx->Stencil.ValueMask);
+ r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
for (i=0;i<n;i++) {
if (mask[i]) {
- s = (GLstencil) (stencil[i] & ctx->Stencil.ValueMask);
+ s = (GLstencil) (stencil[i] & valueMask);
if (r < s) {
/* passed */
fail[i] = 0;
}
break;
case GL_LEQUAL:
- r = (GLstencil) (ctx->Stencil.Ref & ctx->Stencil.ValueMask);
+ r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
for (i=0;i<n;i++) {
if (mask[i]) {
- s = (GLstencil) (stencil[i] & ctx->Stencil.ValueMask);
+ s = (GLstencil) (stencil[i] & valueMask);
if (r <= s) {
/* pass */
fail[i] = 0;
}
break;
case GL_GREATER:
- r = (GLstencil) (ctx->Stencil.Ref & ctx->Stencil.ValueMask);
+ r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
for (i=0;i<n;i++) {
if (mask[i]) {
- s = (GLstencil) (stencil[i] & ctx->Stencil.ValueMask);
+ s = (GLstencil) (stencil[i] & valueMask);
if (r > s) {
/* passed */
fail[i] = 0;
}
break;
case GL_GEQUAL:
- r = (GLstencil) (ctx->Stencil.Ref & ctx->Stencil.ValueMask);
+ r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
for (i=0;i<n;i++) {
if (mask[i]) {
- s = (GLstencil) (stencil[i] & ctx->Stencil.ValueMask);
+ s = (GLstencil) (stencil[i] & valueMask);
if (r >= s) {
/* passed */
fail[i] = 0;
}
break;
case GL_EQUAL:
- r = (GLstencil) (ctx->Stencil.Ref & ctx->Stencil.ValueMask);
+ r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
for (i=0;i<n;i++) {
if (mask[i]) {
- s = (GLstencil) (stencil[i] & ctx->Stencil.ValueMask);
+ s = (GLstencil) (stencil[i] & valueMask);
if (r == s) {
/* passed */
fail[i] = 0;
}
break;
case GL_NOTEQUAL:
- r = (GLstencil) (ctx->Stencil.Ref & ctx->Stencil.ValueMask);
+ r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
for (i=0;i<n;i++) {
if (mask[i]) {
- s = (GLstencil) (stencil[i] & ctx->Stencil.ValueMask);
+ s = (GLstencil) (stencil[i] & valueMask);
if (r != s) {
/* passed */
fail[i] = 0;
return 0;
}
- if (ctx->Stencil.FailFunc != GL_KEEP) {
- apply_stencil_op( ctx, ctx->Stencil.FailFunc, n, stencil, fail );
+ if (ctx->Stencil.FailFunc[face] != GL_KEEP) {
+ apply_stencil_op( ctx, ctx->Stencil.FailFunc[face], face, n, stencil, fail );
}
return !allfail;
-
-/*
- * Apply stencil and depth testing to an array of pixels.
- * Hardware or software stencil buffer acceptable.
+/**
+ * Apply stencil and depth testing to the span of pixels.
+ * Both software and hardware stencil buffers are acceptable.
* Input: n - number of pixels in the span
+ * x, y - location of leftmost pixel in span
* z - array [n] of z values
- * stencil - array [n] of stencil values
* mask - array [n] of flags (1=test this pixel, 0=skip the pixel)
- * Output: stencil - modified stencil values
- * mask - array [n] of flags (1=stencil and depth test passed)
- * Return: GL_TRUE - all fragments failed the testing
- * GL_FALSE - one or more fragments passed the testing
+ * Output: mask - array [n] of flags (1=stencil and depth test passed)
+ * Return: GL_FALSE - all fragments failed the testing
+ * GL_TRUE - one or more fragments passed the testing
*
*/
static GLboolean
-stencil_and_ztest_span( GLcontext *ctx, GLuint n, GLint x, GLint y,
- const GLdepth z[], GLstencil stencil[],
- GLubyte mask[] )
+stencil_and_ztest_span(GLcontext *ctx, struct sw_span *span, GLuint face)
{
- ASSERT(ctx->Stencil.Enabled);
- ASSERT(n <= PB_SIZE);
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLstencil stencilRow[MAX_WIDTH];
+ GLstencil *stencil;
+ const GLuint n = span->end;
+ const GLint x = span->x;
+ const GLint y = span->y;
+ GLubyte *mask = span->array->mask;
+ ASSERT((span->arrayMask & SPAN_XY) == 0);
+ ASSERT(ctx->Stencil.Enabled);
+ ASSERT(n <= MAX_WIDTH);
+#ifdef DEBUG
+ if (ctx->Depth.Test) {
+ ASSERT(span->arrayMask & SPAN_Z);
+ }
+#endif
+
+ /* Get initial stencil values */
+ if (swrast->Driver.WriteStencilSpan) {
+ /* Get stencil values from the hardware stencil buffer */
+ ASSERT(swrast->Driver.ReadStencilSpan);
+ (*swrast->Driver.ReadStencilSpan)(ctx, n, x, y, stencilRow);
+ stencil = stencilRow;
+ }
+ else {
+ /* Get pointer into software stencil buffer */
+ stencil = STENCIL_ADDRESS(x, y);
+ }
+
/*
* Apply the stencil test to the fragments.
* failMask[i] is 1 if the stencil test failed.
*/
- if (do_stencil_test( ctx, n, stencil, mask ) == GL_FALSE) {
+ if (do_stencil_test( ctx, face, n, stencil, mask ) == GL_FALSE) {
/* all fragments failed the stencil test, we're done. */
+ span->writeAll = GL_FALSE;
return GL_FALSE;
}
-
/*
* Some fragments passed the stencil test, apply depth test to them
* and apply Zpass and Zfail stencil ops.
*/
- if (ctx->Depth.Test==GL_FALSE) {
+ if (ctx->Depth.Test == GL_FALSE) {
/*
* No depth buffer, just apply zpass stencil function to active pixels.
*/
- apply_stencil_op( ctx, ctx->Stencil.ZPassFunc, n, stencil, mask );
+ apply_stencil_op( ctx, ctx->Stencil.ZPassFunc[face], face, n, stencil, mask );
}
else {
/*
MEMCPY(oldmask, mask, n * sizeof(GLubyte));
/* apply the depth test */
- _old_depth_test_span(ctx, n, x, y, z, mask);
+ _swrast_depth_test_span(ctx, span);
/* Set the stencil pass/fail flags according to result of depth testing.
* if oldmask[i] == 0 then
}
/* apply the pass and fail operations */
- if (ctx->Stencil.ZFailFunc != GL_KEEP) {
- apply_stencil_op( ctx, ctx->Stencil.ZFailFunc, n, stencil, failmask );
+ if (ctx->Stencil.ZFailFunc[face] != GL_KEEP) {
+ apply_stencil_op( ctx, ctx->Stencil.ZFailFunc[face], face,
+ n, stencil, failmask );
}
- if (ctx->Stencil.ZPassFunc != GL_KEEP) {
- apply_stencil_op( ctx, ctx->Stencil.ZPassFunc, n, stencil, passmask );
+ if (ctx->Stencil.ZPassFunc[face] != GL_KEEP) {
+ apply_stencil_op( ctx, ctx->Stencil.ZPassFunc[face], face,
+ n, stencil, passmask );
}
}
- return GL_TRUE; /* one or more fragments passed both tests */
-}
-
-
-
-/*
- * Apply stencil and depth testing to the span of pixels.
- * Both software and hardware stencil buffers are acceptable.
- * Input: n - number of pixels in the span
- * x, y - location of leftmost pixel in span
- * z - array [n] of z values
- * mask - array [n] of flags (1=test this pixel, 0=skip the pixel)
- * Output: mask - array [n] of flags (1=stencil and depth test passed)
- * Return: GL_TRUE - all fragments failed the testing
- * GL_FALSE - one or more fragments passed the testing
- *
- */
-GLboolean
-_old_stencil_and_ztest_span( GLcontext *ctx, GLuint n, GLint x, GLint y,
- const GLdepth z[], GLubyte mask[] )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- GLstencil stencilRow[MAX_WIDTH];
- GLstencil *stencil;
- GLboolean result;
-
- ASSERT(ctx->Stencil.Enabled);
- ASSERT(n <= MAX_WIDTH);
-
- /* Get initial stencil values */
- if (swrast->Driver.WriteStencilSpan) {
- ASSERT(swrast->Driver.ReadStencilSpan);
- /* Get stencil values from the hardware stencil buffer */
- (*swrast->Driver.ReadStencilSpan)(ctx, n, x, y, stencilRow);
- stencil = stencilRow;
- }
- else {
- /* software stencil buffer */
- stencil = STENCIL_ADDRESS(x, y);
- }
-
- /* do all the stencil/depth testing/updating */
- result = stencil_and_ztest_span( ctx, n, x, y, z, stencil, mask );
-
+ /*
+ * Write updated stencil values back into hardware stencil buffer.
+ */
if (swrast->Driver.WriteStencilSpan) {
- /* Write updated stencil values into hardware stencil buffer */
+ ASSERT(stencil == stencilRow);
(swrast->Driver.WriteStencilSpan)(ctx, n, x, y, stencil, mask );
}
-
- return result;
-}
-
-/*
- * Apply stencil and depth testing to the span of pixels.
- * Both software and hardware stencil buffers are acceptable.
- * Input: n - number of pixels in the span
- * x, y - location of leftmost pixel in span
- * z - array [n] of z values
- * mask - array [n] of flags (1=test this pixel, 0=skip the pixel)
- * Output: mask - array [n] of flags (1=stencil and depth test passed)
- * Return: GL_TRUE - all fragments failed the testing
- * GL_FALSE - one or more fragments passed the testing
- *
- */
-GLboolean
-_mesa_stencil_and_ztest_span(GLcontext *ctx, struct sw_span *span)
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
-
- GLstencil stencilRow[MAX_WIDTH];
- GLstencil *stencil;
- GLboolean result;
-
- ASSERT(ctx->Stencil.Enabled);
- ASSERT(span->end <= MAX_WIDTH);
- ASSERT(span->filledMask == GL_TRUE);
- ASSERT(span->filledDepth == GL_TRUE);
- SW_SPAN_SET_FLAG(span->testedDepth);
-
-
- /* Get initial stencil values */
- if (swrast->Driver.WriteStencilSpan) {
- ASSERT(swrast->Driver.ReadStencilSpan);
- /* Get stencil values from the hardware stencil buffer */
- (*swrast->Driver.ReadStencilSpan)(ctx, span->end, span->x, span->y, stencilRow);
- stencil = stencilRow;
- }
- else {
- /* software stencil buffer */
- stencil = STENCIL_ADDRESS(span->x, span->y);
- }
- /* do all the stencil/depth testing/updating */
- result = stencil_and_ztest_span( ctx, span->end, span->x, span->y,
- span->depth, stencil, span->mask );
-
- if (swrast->Driver.WriteStencilSpan) {
- /* Write updated stencil values into hardware stencil buffer */
- (swrast->Driver.WriteStencilSpan)(ctx, span->end, span->x,
- span->y, stencil, span->mask );
- }
+ span->writeAll = GL_FALSE;
- span->write_all = GL_FALSE;
-
- return result;
+ return GL_TRUE; /* one or more fragments passed both tests */
}
-/*
+/**
* Apply the given stencil operator for each pixel in the array whose
- * mask flag is set. This is for software stencil buffers only.
+ * mask flag is set.
+ * \note This is for software stencil buffers only.
* Input: n - number of pixels in the span
* x, y - array of [n] pixels
* operator - the stencil buffer operator
static void
apply_stencil_op_to_pixels( const GLcontext *ctx,
GLuint n, const GLint x[], const GLint y[],
- GLenum oper, const GLubyte mask[] )
+ GLenum oper, GLuint face, const GLubyte mask[] )
{
- const GLstencil ref = ctx->Stencil.Ref;
- const GLstencil wrtmask = ctx->Stencil.WriteMask;
- const GLstencil invmask = (GLstencil) (~ctx->Stencil.WriteMask);
+ const GLstencil ref = ctx->Stencil.Ref[face];
+ const GLstencil wrtmask = ctx->Stencil.WriteMask[face];
+ const GLstencil invmask = (GLstencil) (~wrtmask);
GLuint i;
ASSERT(!SWRAST_CONTEXT(ctx)->Driver.WriteStencilSpan); /* software stencil buffer only! */
-/*
+/**
* Apply stencil test to an array of pixels before depth buffering.
- * Used for software stencil buffer only.
+ *
+ * \note Used for software stencil buffer only.
* Input: n - number of pixels in the span
* x, y - array of [n] pixels to stencil
* mask - array [n] of flag: 0=skip the pixel, 1=stencil the pixel
* Output: mask - pixels which fail the stencil test will have their
* mask flag set to 0.
- * Return: 0 = all pixels failed, 1 = zero or more pixels passed.
+ * \return GL_FALSE = all pixels failed, GL_TRUE = zero or more pixels passed.
*/
static GLboolean
-stencil_test_pixels( GLcontext *ctx, GLuint n,
+stencil_test_pixels( GLcontext *ctx, GLuint face, GLuint n,
const GLint x[], const GLint y[], GLubyte mask[] )
{
- GLubyte fail[PB_SIZE];
+ GLubyte fail[MAX_WIDTH];
GLstencil r, s;
GLuint i;
GLboolean allfail = GL_FALSE;
+ const GLuint valueMask = ctx->Stencil.ValueMask[face];
- ASSERT(!SWRAST_CONTEXT(ctx)->Driver.WriteStencilSpan); /* software stencil buffer only! */
+ /* software stencil buffer only! */
+ ASSERT(ctx->DrawBuffer->UseSoftwareStencilBuffer);
+ ASSERT(!SWRAST_CONTEXT(ctx)->Driver.ReadStencilSpan);
+ ASSERT(!SWRAST_CONTEXT(ctx)->Driver.WriteStencilSpan);
/*
* Perform stencil test. The results of this operation are stored
* ENDIF
*/
- switch (ctx->Stencil.Function) {
+ switch (ctx->Stencil.Function[face]) {
case GL_NEVER:
/* always fail */
for (i=0;i<n;i++) {
allfail = GL_TRUE;
break;
case GL_LESS:
- r = (GLstencil) (ctx->Stencil.Ref & ctx->Stencil.ValueMask);
+ r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
for (i=0;i<n;i++) {
if (mask[i]) {
GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]);
- s = (GLstencil) (*sptr & ctx->Stencil.ValueMask);
+ s = (GLstencil) (*sptr & valueMask);
if (r < s) {
/* passed */
fail[i] = 0;
}
break;
case GL_LEQUAL:
- r = (GLstencil) (ctx->Stencil.Ref & ctx->Stencil.ValueMask);
+ r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
for (i=0;i<n;i++) {
if (mask[i]) {
GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]);
- s = (GLstencil) (*sptr & ctx->Stencil.ValueMask);
+ s = (GLstencil) (*sptr & valueMask);
if (r <= s) {
/* pass */
fail[i] = 0;
}
break;
case GL_GREATER:
- r = (GLstencil) (ctx->Stencil.Ref & ctx->Stencil.ValueMask);
+ r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
for (i=0;i<n;i++) {
if (mask[i]) {
GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]);
- s = (GLstencil) (*sptr & ctx->Stencil.ValueMask);
+ s = (GLstencil) (*sptr & valueMask);
if (r > s) {
/* passed */
fail[i] = 0;
}
break;
case GL_GEQUAL:
- r = (GLstencil) (ctx->Stencil.Ref & ctx->Stencil.ValueMask);
+ r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
for (i=0;i<n;i++) {
if (mask[i]) {
GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]);
- s = (GLstencil) (*sptr & ctx->Stencil.ValueMask);
+ s = (GLstencil) (*sptr & valueMask);
if (r >= s) {
/* passed */
fail[i] = 0;
}
break;
case GL_EQUAL:
- r = (GLstencil) (ctx->Stencil.Ref & ctx->Stencil.ValueMask);
+ r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
for (i=0;i<n;i++) {
if (mask[i]) {
GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]);
- s = (GLstencil) (*sptr & ctx->Stencil.ValueMask);
+ s = (GLstencil) (*sptr & valueMask);
if (r == s) {
/* passed */
fail[i] = 0;
}
break;
case GL_NOTEQUAL:
- r = (GLstencil) (ctx->Stencil.Ref & ctx->Stencil.ValueMask);
+ r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
for (i=0;i<n;i++) {
if (mask[i]) {
GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]);
- s = (GLstencil) (*sptr & ctx->Stencil.ValueMask);
+ s = (GLstencil) (*sptr & valueMask);
if (r != s) {
/* passed */
fail[i] = 0;
return 0;
}
- if (ctx->Stencil.FailFunc != GL_KEEP) {
- apply_stencil_op_to_pixels( ctx, n, x, y, ctx->Stencil.FailFunc, fail );
+ if (ctx->Stencil.FailFunc[face] != GL_KEEP) {
+ apply_stencil_op_to_pixels( ctx, n, x, y, ctx->Stencil.FailFunc[face],
+ face, fail );
}
return !allfail;
-/*
+/**
* Apply stencil and depth testing to an array of pixels.
* This is used both for software and hardware stencil buffers.
*
* z - array [n] of z values
* mask - array [n] of flags (1=test this pixel, 0=skip the pixel)
* Output: mask - array [n] of flags (1=stencil and depth test passed)
- * Return: GL_TRUE - all fragments failed the testing
- * GL_FALSE - one or more fragments passed the testing
+ * Return: GL_FALSE - all fragments failed the testing
+ * GL_TRUE - one or more fragments passed the testing
*/
-GLboolean
-_mesa_stencil_and_ztest_pixels( GLcontext *ctx,
- GLuint n, const GLint x[], const GLint y[],
- const GLdepth z[], GLubyte mask[] )
+static GLboolean
+stencil_and_ztest_pixels( GLcontext *ctx, struct sw_span *span, GLuint face )
{
+ const GLuint n = span->end;
+ const GLint *x = span->array->x;
+ const GLint *y = span->array->y;
+ GLubyte *mask = span->array->mask;
SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ ASSERT(span->arrayMask & SPAN_XY);
ASSERT(ctx->Stencil.Enabled);
- ASSERT(n <= PB_SIZE);
+ ASSERT(n <= MAX_WIDTH);
if (swrast->Driver.WriteStencilPixels) {
/*** Hardware stencil buffer ***/
- GLstencil stencil[PB_SIZE];
- GLubyte origMask[PB_SIZE];
+ GLstencil stencil[MAX_WIDTH];
+ GLubyte origMask[MAX_WIDTH];
+ ASSERT(!ctx->DrawBuffer->UseSoftwareStencilBuffer);
ASSERT(swrast->Driver.ReadStencilPixels);
(*swrast->Driver.ReadStencilPixels)(ctx, n, x, y, stencil);
MEMCPY(origMask, mask, n * sizeof(GLubyte));
- (void) do_stencil_test(ctx, n, stencil, mask);
+ (void) do_stencil_test(ctx, face, n, stencil, mask);
if (ctx->Depth.Test == GL_FALSE) {
- apply_stencil_op(ctx, ctx->Stencil.ZPassFunc, n, stencil, mask);
+ apply_stencil_op(ctx, ctx->Stencil.ZPassFunc[face], face,
+ n, stencil, mask);
}
else {
- _mesa_depth_test_pixels(ctx, n, x, y, z, mask);
+ _swrast_depth_test_span(ctx, span);
- if (ctx->Stencil.ZFailFunc != GL_KEEP) {
- GLubyte failmask[PB_SIZE];
+ if (ctx->Stencil.ZFailFunc[face] != GL_KEEP) {
+ GLubyte failmask[MAX_WIDTH];
GLuint i;
for (i = 0; i < n; i++) {
ASSERT(mask[i] == 0 || mask[i] == 1);
failmask[i] = origMask[i] & (mask[i] ^ 1);
}
- apply_stencil_op(ctx, ctx->Stencil.ZFailFunc,
+ apply_stencil_op(ctx, ctx->Stencil.ZFailFunc[face], face,
n, stencil, failmask);
}
- if (ctx->Stencil.ZPassFunc != GL_KEEP) {
- GLubyte passmask[PB_SIZE];
+ if (ctx->Stencil.ZPassFunc[face] != GL_KEEP) {
+ GLubyte passmask[MAX_WIDTH];
GLuint i;
for (i = 0; i < n; i++) {
ASSERT(mask[i] == 0 || mask[i] == 1);
passmask[i] = origMask[i] & mask[i];
}
- apply_stencil_op(ctx, ctx->Stencil.ZPassFunc,
+ apply_stencil_op(ctx, ctx->Stencil.ZPassFunc[face], face,
n, stencil, passmask);
}
}
else {
/*** Software stencil buffer ***/
- if (stencil_test_pixels(ctx, n, x, y, mask) == GL_FALSE) {
+ ASSERT(ctx->DrawBuffer->UseSoftwareStencilBuffer);
+
+ if (stencil_test_pixels(ctx, face, n, x, y, mask) == GL_FALSE) {
/* all fragments failed the stencil test, we're done. */
return GL_FALSE;
}
if (ctx->Depth.Test==GL_FALSE) {
apply_stencil_op_to_pixels(ctx, n, x, y,
- ctx->Stencil.ZPassFunc, mask);
+ ctx->Stencil.ZPassFunc[face], face, mask);
}
else {
- GLubyte passmask[PB_SIZE], failmask[PB_SIZE], oldmask[PB_SIZE];
+ GLubyte passmask[MAX_WIDTH], failmask[MAX_WIDTH], oldmask[MAX_WIDTH];
GLuint i;
MEMCPY(oldmask, mask, n * sizeof(GLubyte));
- _mesa_depth_test_pixels(ctx, n, x, y, z, mask);
+ _swrast_depth_test_span(ctx, span);
for (i=0;i<n;i++) {
ASSERT(mask[i] == 0 || mask[i] == 1);
failmask[i] = oldmask[i] & (mask[i] ^ 1);
}
- if (ctx->Stencil.ZFailFunc != GL_KEEP) {
+ if (ctx->Stencil.ZFailFunc[face] != GL_KEEP) {
apply_stencil_op_to_pixels(ctx, n, x, y,
- ctx->Stencil.ZFailFunc, failmask);
+ ctx->Stencil.ZFailFunc[face],
+ face, failmask);
}
- if (ctx->Stencil.ZPassFunc != GL_KEEP) {
+ if (ctx->Stencil.ZPassFunc[face] != GL_KEEP) {
apply_stencil_op_to_pixels(ctx, n, x, y,
- ctx->Stencil.ZPassFunc, passmask);
+ ctx->Stencil.ZPassFunc[face],
+ face, passmask);
}
}
}
+/**
+ * /return GL_TRUE = one or more fragments passed,
+ * GL_FALSE = all fragments failed.
+ */
+GLboolean
+_swrast_stencil_and_ztest_span(GLcontext *ctx, struct sw_span *span)
+{
+ /* span->facing can only be non-zero if using two-sided stencil */
+ ASSERT(ctx->Stencil.TestTwoSide || span->facing == 0);
+ if (span->arrayMask & SPAN_XY)
+ return stencil_and_ztest_pixels(ctx, span, span->facing);
+ else
+ return stencil_and_ztest_span(ctx, span, span->facing);
+}
-/*
+
+/**
* Return a span of stencil values from the stencil buffer.
* Used for glRead/CopyPixels
* Input: n - how many pixels
* Output: stencil - the array of stencil values
*/
void
-_mesa_read_stencil_span( GLcontext *ctx,
+_swrast_read_stencil_span( GLcontext *ctx,
GLint n, GLint x, GLint y, GLstencil stencil[] )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
- if (y < 0 || y >= ctx->DrawBuffer->Height ||
- x + n <= 0 || x >= ctx->DrawBuffer->Width) {
+ const GLint bufWidth = (GLint) ctx->DrawBuffer->Width;
+ const GLint bufHeight = (GLint) ctx->DrawBuffer->Height;
+
+ if (y < 0 || y >= bufHeight || x + n <= 0 || x >= bufWidth) {
/* span is completely outside framebuffer */
return; /* undefined values OK */
}
n -= dx;
stencil += dx;
}
- if (x + n > ctx->DrawBuffer->Width) {
- GLint dx = x + n - ctx->DrawBuffer->Width;
+ if (x + n > bufWidth) {
+ GLint dx = x + n - bufWidth;
n -= dx;
}
if (n <= 0) {
-/*
+/**
* Write a span of stencil values to the stencil buffer.
* Used for glDraw/CopyPixels
* Input: n - how many pixels
* stencil - the array of stencil values
*/
void
-_mesa_write_stencil_span( GLcontext *ctx, GLint n, GLint x, GLint y,
+_swrast_write_stencil_span( GLcontext *ctx, GLint n, GLint x, GLint y,
const GLstencil stencil[] )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
const GLstencil *ssrc = stencil;
+ const GLint bufWidth = (GLint) ctx->DrawBuffer->Width;
+ const GLint bufHeight = (GLint) ctx->DrawBuffer->Height;
- if (y < 0 || y >= ctx->DrawBuffer->Height ||
- x + n <= 0 || x >= ctx->DrawBuffer->Width) {
+ if (y < 0 || y >= bufHeight || x + n <= 0 || x >= bufWidth) {
/* span is completely outside framebuffer */
return; /* undefined values OK */
}
n -= dx;
ssrc += dx;
}
- if (x + n > ctx->DrawBuffer->Width) {
- GLint dx = x + n - ctx->DrawBuffer->Width;
+ if (x + n > bufWidth) {
+ GLint dx = x + n - bufWidth;
n -= dx;
}
if (n <= 0) {
-/*
+/**
* Allocate a new stencil buffer. If there's an old one it will be
* deallocated first. The new stencil buffer will be uninitialized.
*/
void
-_mesa_alloc_stencil_buffer( GLcontext *ctx )
+_swrast_alloc_stencil_buffer( GLframebuffer *buffer )
{
- GLuint buffersize = ctx->DrawBuffer->Width * ctx->DrawBuffer->Height;
-
/* deallocate current stencil buffer if present */
- if (ctx->DrawBuffer->Stencil) {
- FREE(ctx->DrawBuffer->Stencil);
- ctx->DrawBuffer->Stencil = NULL;
+ if (buffer->Stencil) {
+ MESA_PBUFFER_FREE(buffer->Stencil);
+ buffer->Stencil = NULL;
}
/* allocate new stencil buffer */
- ctx->DrawBuffer->Stencil = (GLstencil *) MALLOC(buffersize * sizeof(GLstencil));
- if (!ctx->DrawBuffer->Stencil) {
+ buffer->Stencil = (GLstencil *)
+ MESA_PBUFFER_ALLOC(buffer->Width * buffer->Height * sizeof(GLstencil));
+ if (!buffer->Stencil) {
/* out of memory */
-/* _mesa_set_enable( ctx, GL_STENCIL_TEST, GL_FALSE ); */
- _mesa_error( ctx, GL_OUT_OF_MEMORY, "_mesa_alloc_stencil_buffer" );
+ _mesa_error( NULL, GL_OUT_OF_MEMORY, "_swrast_alloc_stencil_buffer" );
}
}
-/*
+/**
* Clear the software (malloc'd) stencil buffer.
*/
static void
if (ctx->Scissor.Enabled) {
/* clear scissor region only */
const GLint width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
- if (ctx->Stencil.WriteMask != STENCIL_MAX) {
+ if (ctx->Stencil.WriteMask[0] != STENCIL_MAX) {
/* must apply mask to the clear */
GLint y;
for (y = ctx->DrawBuffer->_Ymin; y < ctx->DrawBuffer->_Ymax; y++) {
- const GLstencil mask = ctx->Stencil.WriteMask;
+ const GLstencil mask = ctx->Stencil.WriteMask[0];
const GLstencil invMask = ~mask;
const GLstencil clearVal = (ctx->Stencil.Clear & mask);
GLstencil *stencil = STENCIL_ADDRESS( ctx->DrawBuffer->_Xmin, y );
}
else {
/* clear whole stencil buffer */
- if (ctx->Stencil.WriteMask != STENCIL_MAX) {
+ if (ctx->Stencil.WriteMask[0] != STENCIL_MAX) {
/* must apply mask to the clear */
const GLuint n = ctx->DrawBuffer->Width * ctx->DrawBuffer->Height;
GLstencil *stencil = ctx->DrawBuffer->Stencil;
- const GLstencil mask = ctx->Stencil.WriteMask;
+ const GLstencil mask = ctx->Stencil.WriteMask[0];
const GLstencil invMask = ~mask;
const GLstencil clearVal = (ctx->Stencil.Clear & mask);
GLuint i;
-/*
+/**
* Clear the hardware (in graphics card) stencil buffer.
* This is done with the Driver.WriteStencilSpan() and Driver.ReadStencilSpan()
* functions.
/* clear scissor region only */
const GLint x = ctx->DrawBuffer->_Xmin;
const GLint width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
- if (ctx->Stencil.WriteMask != STENCIL_MAX) {
+ if (ctx->Stencil.WriteMask[0] != STENCIL_MAX) {
/* must apply mask to the clear */
GLint y;
for (y = ctx->DrawBuffer->_Ymin; y < ctx->DrawBuffer->_Ymax; y++) {
- const GLstencil mask = ctx->Stencil.WriteMask;
+ const GLstencil mask = ctx->Stencil.WriteMask[0];
const GLstencil invMask = ~mask;
const GLstencil clearVal = (ctx->Stencil.Clear & mask);
GLstencil stencil[MAX_WIDTH];
}
else {
/* clear whole stencil buffer */
- if (ctx->Stencil.WriteMask != STENCIL_MAX) {
+ if (ctx->Stencil.WriteMask[0] != STENCIL_MAX) {
/* must apply mask to the clear */
- const GLstencil mask = ctx->Stencil.WriteMask;
+ const GLstencil mask = ctx->Stencil.WriteMask[0];
const GLstencil invMask = ~mask;
const GLstencil clearVal = (ctx->Stencil.Clear & mask);
const GLint width = ctx->DrawBuffer->Width;
-/*
- * Clear the stencil buffer.
+/**
+ * Clear the stencil buffer (hardware or software).
*/
void
-_mesa_clear_stencil_buffer( GLcontext *ctx )
+_swrast_clear_stencil_buffer( GLcontext *ctx )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
if (swrast->Driver.WriteStencilSpan) {
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