-/* $Id: s_stencil.c,v 1.22 2002/03/19 16:47:05 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"
* 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,
+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[MAX_WIDTH];
GLboolean allfail = GL_FALSE;
GLuint i;
GLstencil r, s;
+ const GLuint valueMask = ctx->Stencil.ValueMask[face];
ASSERT(n <= MAX_WIDTH);
* the stencil fail operator is not to be applied
* ENDIF
*/
- switch (ctx->Stencil.Function) {
+ switch (ctx->Stencil.Function[face]) {
case GL_NEVER:
/* never pass; 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]) {
- 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;
*
*/
static GLboolean
-stencil_and_ztest_span(GLcontext *ctx, struct sw_span *span)
+stencil_and_ztest_span(GLcontext *ctx, struct sw_span *span, GLuint face)
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLstencil stencilRow[MAX_WIDTH];
const GLuint n = span->end;
const GLint x = span->x;
const GLint y = span->y;
- GLubyte *mask = span->mask;
+ GLubyte *mask = span->array->mask;
ASSERT((span->arrayMask & SPAN_XY) == 0);
ASSERT(ctx->Stencil.Enabled);
* 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;
/*
* 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 */
- _mesa_depth_test_span(ctx, span);
+ _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 );
}
}
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! */
* \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[MAX_WIDTH];
GLstencil r, s;
GLuint i;
GLboolean allfail = GL_FALSE;
+ const GLuint valueMask = ctx->Stencil.ValueMask[face];
/* software stencil buffer only! */
ASSERT(ctx->DrawBuffer->UseSoftwareStencilBuffer);
* 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;
* GL_TRUE - one or more fragments passed the testing
*/
static GLboolean
-stencil_and_ztest_pixels( GLcontext *ctx, struct sw_span *span )
+stencil_and_ztest_pixels( GLcontext *ctx, struct sw_span *span, GLuint face )
{
const GLuint n = span->end;
- const GLint *x = span->xArray;
- const GLint *y = span->yArray;
- GLubyte *mask = span->mask;
+ 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);
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_span(ctx, span);
+ _swrast_depth_test_span(ctx, span);
- if (ctx->Stencil.ZFailFunc != GL_KEEP) {
+ 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) {
+ 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);
}
}
ASSERT(ctx->DrawBuffer->UseSoftwareStencilBuffer);
- if (stencil_test_pixels(ctx, n, x, y, mask) == GL_FALSE) {
+ 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[MAX_WIDTH], failmask[MAX_WIDTH], oldmask[MAX_WIDTH];
MEMCPY(oldmask, mask, n * sizeof(GLubyte));
- _mesa_depth_test_span(ctx, span);
+ _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);
}
}
* GL_FALSE = all fragments failed.
*/
GLboolean
-_mesa_stencil_and_ztest_span(GLcontext *ctx, struct sw_span *span)
+_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);
+ return stencil_and_ztest_pixels(ctx, span, span->facing);
else
- return stencil_and_ztest_span(ctx, span);
+ return stencil_and_ztest_span(ctx, span, span->facing);
}
* 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) {
* 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) {
* deallocated first. The new stencil buffer will be uninitialized.
*/
void
-_mesa_alloc_stencil_buffer( GLframebuffer *buffer )
+_swrast_alloc_stencil_buffer( GLframebuffer *buffer )
{
/* deallocate current stencil buffer if present */
if (buffer->Stencil) {
MESA_PBUFFER_ALLOC(buffer->Width * buffer->Height * sizeof(GLstencil));
if (!buffer->Stencil) {
/* out of memory */
- _mesa_error( NULL, GL_OUT_OF_MEMORY, "_mesa_alloc_stencil_buffer" );
+ _mesa_error( NULL, GL_OUT_OF_MEMORY, "_swrast_alloc_stencil_buffer" );
}
}
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 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 (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) {
projects / mesa.git / blobdiff