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-rw-r--r--src/mesa/swrast/s_stencil.c417
1 files changed, 145 insertions, 272 deletions
diff --git a/src/mesa/swrast/s_stencil.c b/src/mesa/swrast/s_stencil.c
index 38182ad613b..84818771718 100644
--- a/src/mesa/swrast/s_stencil.c
+++ b/src/mesa/swrast/s_stencil.c
@@ -1,8 +1,8 @@
/*
* Mesa 3-D graphics library
- * Version: 6.1
+ * Version: 6.3
*
- * Copyright (C) 1999-2004 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
@@ -27,6 +27,7 @@
#include "context.h"
#include "macros.h"
#include "imports.h"
+#include "fbobject.h"
#include "s_context.h"
#include "s_depth.h"
@@ -50,14 +51,6 @@ ENDIF
*/
-/*
- * Return the address of a stencil buffer value given the window coords:
- */
-#define STENCIL_ADDRESS(X,Y) \
- (ctx->DrawBuffer->Stencil + ctx->DrawBuffer->Width * (Y) + (X))
-
-
-
/**
* Apply the given stencil operator to the array of stencil values.
* Don't touch stencil[i] if mask[i] is zero.
@@ -415,7 +408,8 @@ do_stencil_test( GLcontext *ctx, GLuint face, GLuint n, GLstencil stencil[],
static GLboolean
stencil_and_ztest_span(GLcontext *ctx, struct sw_span *span, GLuint face)
{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
+ struct gl_renderbuffer *rb = fb->Attachment[BUFFER_STENCIL].Renderbuffer;
GLstencil stencilRow[MAX_WIDTH];
GLstencil *stencil;
const GLuint n = span->end;
@@ -431,19 +425,13 @@ stencil_and_ztest_span(GLcontext *ctx, struct sw_span *span, GLuint face)
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 = rb->GetPointer(ctx, rb, x, y);
+ if (!stencil) {
+ rb->GetRow(ctx, rb, 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.
@@ -507,9 +495,8 @@ stencil_and_ztest_span(GLcontext *ctx, struct sw_span *span, GLuint face)
/*
* Write updated stencil values back into hardware stencil buffer.
*/
- if (swrast->Driver.WriteStencilSpan) {
- ASSERT(stencil == stencilRow);
- (swrast->Driver.WriteStencilSpan)(ctx, n, x, y, stencil, mask );
+ if (!rb->GetPointer(ctx, rb, 0, 0)) {
+ rb->PutRow(ctx, rb, n, x, y, stencil, mask);
}
span->writeAll = GL_FALSE;
@@ -519,6 +506,12 @@ stencil_and_ztest_span(GLcontext *ctx, struct sw_span *span, GLuint face)
+/*
+ * Return the address of a stencil buffer value given the window coords:
+ */
+#define STENCIL_ADDRESS(X, Y) (stencilStart + (Y) * stride + (X))
+
+
/**
* Apply the given stencil operator for each pixel in the array whose
@@ -530,16 +523,21 @@ stencil_and_ztest_span(GLcontext *ctx, struct sw_span *span, GLuint face)
* mask - array [n] of flag: 1=apply operator, 0=don't apply operator
*/
static void
-apply_stencil_op_to_pixels( const GLcontext *ctx,
+apply_stencil_op_to_pixels( GLcontext *ctx,
GLuint n, const GLint x[], const GLint y[],
GLenum oper, GLuint face, const GLubyte mask[] )
{
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
+ struct gl_renderbuffer *rb = fb->Attachment[BUFFER_STENCIL].Renderbuffer;
const GLstencil ref = ctx->Stencil.Ref[face];
const GLstencil wrtmask = ctx->Stencil.WriteMask[face];
const GLstencil invmask = (GLstencil) (~wrtmask);
GLuint i;
+ GLstencil *stencilStart = (GLubyte *) rb->Data;
+ const GLuint stride = rb->Width;
- ASSERT(!SWRAST_CONTEXT(ctx)->Driver.WriteStencilSpan); /* software stencil buffer only! */
+ ASSERT(rb->GetPointer(ctx, rb, 0, 0));
+ ASSERT(sizeof(GLstencil) == 1);
switch (oper) {
case GL_KEEP:
@@ -701,16 +699,18 @@ static GLboolean
stencil_test_pixels( GLcontext *ctx, GLuint face, GLuint n,
const GLint x[], const GLint y[], GLubyte mask[] )
{
+ const struct gl_framebuffer *fb = ctx->DrawBuffer;
+ struct gl_renderbuffer *rb = fb->Attachment[BUFFER_STENCIL].Renderbuffer;
GLubyte fail[MAX_WIDTH];
GLstencil r, s;
GLuint i;
GLboolean allfail = GL_FALSE;
const GLuint valueMask = ctx->Stencil.ValueMask[face];
+ const GLstencil *stencilStart = (GLstencil *) rb->Data;
+ const GLuint stride = rb->Width;
- /* software stencil buffer only! */
- ASSERT(ctx->DrawBuffer->UseSoftwareStencilBuffer);
- ASSERT(!SWRAST_CONTEXT(ctx)->Driver.ReadStencilSpan);
- ASSERT(!SWRAST_CONTEXT(ctx)->Driver.WriteStencilSpan);
+ ASSERT(rb->GetPointer(ctx, rb, 0, 0));
+ ASSERT(sizeof(GLstencil) == 1);
/*
* Perform stencil test. The results of this operation are stored
@@ -740,7 +740,7 @@ stencil_test_pixels( GLcontext *ctx, GLuint face, GLuint n,
r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
for (i=0;i<n;i++) {
if (mask[i]) {
- GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]);
+ const GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]);
s = (GLstencil) (*sptr & valueMask);
if (r < s) {
/* passed */
@@ -760,7 +760,7 @@ stencil_test_pixels( GLcontext *ctx, GLuint face, GLuint n,
r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
for (i=0;i<n;i++) {
if (mask[i]) {
- GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]);
+ const GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]);
s = (GLstencil) (*sptr & valueMask);
if (r <= s) {
/* pass */
@@ -780,7 +780,7 @@ stencil_test_pixels( GLcontext *ctx, GLuint face, GLuint n,
r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
for (i=0;i<n;i++) {
if (mask[i]) {
- GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]);
+ const GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]);
s = (GLstencil) (*sptr & valueMask);
if (r > s) {
/* passed */
@@ -800,7 +800,7 @@ stencil_test_pixels( GLcontext *ctx, GLuint face, GLuint n,
r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
for (i=0;i<n;i++) {
if (mask[i]) {
- GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]);
+ const GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]);
s = (GLstencil) (*sptr & valueMask);
if (r >= s) {
/* passed */
@@ -820,7 +820,7 @@ stencil_test_pixels( GLcontext *ctx, GLuint face, GLuint n,
r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
for (i=0;i<n;i++) {
if (mask[i]) {
- GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]);
+ const GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]);
s = (GLstencil) (*sptr & valueMask);
if (r == s) {
/* passed */
@@ -840,7 +840,7 @@ stencil_test_pixels( GLcontext *ctx, GLuint face, GLuint n,
r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
for (i=0;i<n;i++) {
if (mask[i]) {
- GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]);
+ const GLstencil *sptr = STENCIL_ADDRESS(x[i],y[i]);
s = (GLstencil) (*sptr & valueMask);
if (r != s) {
/* passed */
@@ -897,24 +897,23 @@ stencil_test_pixels( GLcontext *ctx, GLuint face, GLuint n,
static GLboolean
stencil_and_ztest_pixels( GLcontext *ctx, struct sw_span *span, GLuint face )
{
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
+ struct gl_renderbuffer *rb = fb->Attachment[BUFFER_STENCIL].Renderbuffer;
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 <= MAX_WIDTH);
- if (swrast->Driver.WriteStencilPixels) {
- /*** Hardware stencil buffer ***/
+ if (!rb->GetPointer(ctx, rb, 0, 0)) {
+ /* No direct access */
GLstencil stencil[MAX_WIDTH];
GLubyte origMask[MAX_WIDTH];
- ASSERT(!ctx->DrawBuffer->UseSoftwareStencilBuffer);
- ASSERT(swrast->Driver.ReadStencilPixels);
- (*swrast->Driver.ReadStencilPixels)(ctx, n, x, y, stencil);
+ rb->GetValues(ctx, rb, n, x, y, stencil);
MEMCPY(origMask, mask, n * sizeof(GLubyte));
@@ -950,14 +949,12 @@ stencil_and_ztest_pixels( GLcontext *ctx, struct sw_span *span, GLuint face )
}
/* Write updated stencil values into hardware stencil buffer */
- (swrast->Driver.WriteStencilPixels)(ctx, n, x, y, stencil, origMask);
+ rb->PutValues(ctx, rb, n, x, y, stencil, origMask);
return GL_TRUE;
}
else {
- /*** Software stencil buffer ***/
-
- ASSERT(ctx->DrawBuffer->UseSoftwareStencilBuffer);
+ /* Direct access to stencil buffer */
if (stencil_test_pixels(ctx, face, n, x, y, mask) == GL_FALSE) {
/* all fragments failed the stencil test, we're done. */
@@ -1015,6 +1012,39 @@ _swrast_stencil_and_ztest_span(GLcontext *ctx, struct sw_span *span)
}
+#if 0
+GLuint
+clip_span(GLuint bufferWidth, GLuint bufferHeight,
+ GLint x, GLint y, GLuint *count)
+{
+ GLuint n = *count;
+ GLuint skipPixels = 0;
+
+ if (y < 0 || y >= bufferHeight || x + n <= 0 || x >= bufferWidth) {
+ /* totally out of bounds */
+ n = 0;
+ }
+ else {
+ /* left clip */
+ if (x < 0) {
+ skipPixels = -x;
+ x = 0;
+ n -= skipPixels;
+ }
+ /* right clip */
+ if (x + n > bufferWidth) {
+ GLint dx = x + n - bufferWidth;
+ n -= dx;
+ }
+ }
+
+ *count = n;
+
+ return skipPixels;
+}
+#endif
+
+
/**
* Return a span of stencil values from the stencil buffer.
* Used for glRead/CopyPixels
@@ -1023,14 +1053,10 @@ _swrast_stencil_and_ztest_span(GLcontext *ctx, struct sw_span *span)
* Output: stencil - the array of stencil values
*/
void
-_swrast_read_stencil_span( GLcontext *ctx,
- GLint n, GLint x, GLint y, GLstencil stencil[] )
+_swrast_read_stencil_span(GLcontext *ctx, struct gl_renderbuffer *rb,
+ GLint n, GLint x, GLint y, GLstencil stencil[])
{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- const GLint bufWidth = (GLint) ctx->DrawBuffer->Width;
- const GLint bufHeight = (GLint) ctx->DrawBuffer->Height;
-
- if (y < 0 || y >= bufHeight || x + n <= 0 || x >= bufWidth) {
+ if (y < 0 || y >= rb->Height || x + n <= 0 || x >= rb->Width) {
/* span is completely outside framebuffer */
return; /* undefined values OK */
}
@@ -1041,29 +1067,15 @@ _swrast_read_stencil_span( GLcontext *ctx,
n -= dx;
stencil += dx;
}
- if (x + n > bufWidth) {
- GLint dx = x + n - bufWidth;
+ if (x + n > rb->Width) {
+ GLint dx = x + n - rb->Width;
n -= dx;
}
if (n <= 0) {
return;
}
-
- ASSERT(n >= 0);
- if (swrast->Driver.ReadStencilSpan) {
- (*swrast->Driver.ReadStencilSpan)( ctx, (GLuint) n, x, y, stencil );
- }
- else if (ctx->DrawBuffer->Stencil) {
- const GLstencil *s = STENCIL_ADDRESS( x, y );
-#if STENCIL_BITS == 8
- MEMCPY( stencil, s, n * sizeof(GLstencil) );
-#else
- GLuint i;
- for (i=0;i<n;i++)
- stencil[i] = s[i];
-#endif
- }
+ rb->GetRow(ctx, rb, n, x, y, stencil);
}
@@ -1076,252 +1088,113 @@ _swrast_read_stencil_span( GLcontext *ctx,
* stencil - the array of stencil values
*/
void
-_swrast_write_stencil_span( GLcontext *ctx, GLint n, GLint x, GLint y,
- const GLstencil stencil[] )
+_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;
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
+ struct gl_renderbuffer *rb = fb->Attachment[BUFFER_STENCIL].Renderbuffer;
- if (y < 0 || y >= bufHeight || x + n <= 0 || x >= bufWidth) {
+ if (y < 0 || y >= rb->Height || x + n <= 0 || x >= rb->Width) {
/* span is completely outside framebuffer */
return; /* undefined values OK */
}
-
if (x < 0) {
GLint dx = -x;
x = 0;
n -= dx;
- ssrc += dx;
+ stencil += dx;
}
- if (x + n > bufWidth) {
- GLint dx = x + n - bufWidth;
+ if (x + n > rb->Width) {
+ GLint dx = x + n - rb->Width;
n -= dx;
}
if (n <= 0) {
return;
}
- if (swrast->Driver.WriteStencilSpan) {
- (*swrast->Driver.WriteStencilSpan)( ctx, n, x, y, ssrc, NULL );
- }
- else if (ctx->DrawBuffer->Stencil) {
- GLstencil *s = STENCIL_ADDRESS( x, y );
-#if STENCIL_BITS == 8
- MEMCPY( s, ssrc, n * sizeof(GLstencil) );
-#else
- GLuint i;
- for (i=0;i<n;i++)
- s[i] = ssrc[i];
-#endif
- }
+ rb->PutRow(ctx, rb, n, x, y, stencil, NULL);
}
/**
- * Allocate a new stencil buffer. If there's an old one it will be
- * deallocated first. The new stencil buffer will be uninitialized.
+ * Clear the stencil buffer.
*/
void
-_swrast_alloc_stencil_buffer( GLframebuffer *buffer )
+_swrast_clear_stencil_buffer( GLcontext *ctx, struct gl_renderbuffer *rb )
{
- ASSERT(buffer->UseSoftwareStencilBuffer);
-
- /* deallocate current stencil buffer if present */
- if (buffer->Stencil) {
- MESA_PBUFFER_FREE(buffer->Stencil);
- buffer->Stencil = NULL;
- }
-
- /* allocate new stencil buffer */
- buffer->Stencil = (GLstencil *)
- MESA_PBUFFER_ALLOC(buffer->Width * buffer->Height * sizeof(GLstencil));
- if (!buffer->Stencil) {
- /* out of memory */
- _mesa_error( NULL, GL_OUT_OF_MEMORY, "_swrast_alloc_stencil_buffer" );
- }
-}
+ const GLstencil mask = ctx->Stencil.WriteMask[0];
+ const GLstencil invMask = ~mask;
+ const GLstencil clearVal = (ctx->Stencil.Clear & mask);
+ GLint x, y, width, height;
-
-
-/**
- * Clear the software (malloc'd) stencil buffer.
- */
-static void
-clear_software_stencil_buffer( GLcontext *ctx )
-{
- if (ctx->Visual.stencilBits==0 || !ctx->DrawBuffer->Stencil) {
- /* no stencil buffer */
+ if (!rb || mask == 0)
return;
- }
-
- if (ctx->Scissor.Enabled) {
- /* clear scissor region only */
- const GLint width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
- 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[0];
- const GLstencil invMask = ~mask;
- const GLstencil clearVal = (ctx->Stencil.Clear & mask);
- GLstencil *stencil = STENCIL_ADDRESS( ctx->DrawBuffer->_Xmin, y );
- GLint i;
- for (i = 0; i < width; i++) {
- stencil[i] = (stencil[i] & invMask) | clearVal;
- }
- }
- }
- else {
- /* no masking */
- GLint y;
- for (y = ctx->DrawBuffer->_Ymin; y < ctx->DrawBuffer->_Ymax; y++) {
- GLstencil *stencil = STENCIL_ADDRESS( ctx->DrawBuffer->_Xmin, y );
-#if STENCIL_BITS==8
- MEMSET( stencil, ctx->Stencil.Clear, width * sizeof(GLstencil) );
-#else
- GLint i;
- for (i = 0; i < width; i++)
- stencil[i] = ctx->Stencil.Clear;
-#endif
- }
- }
- }
- else {
- /* clear whole stencil buffer */
- 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[0];
- const GLstencil invMask = ~mask;
- const GLstencil clearVal = (ctx->Stencil.Clear & mask);
- GLuint i;
- for (i = 0; i < n; i++) {
- stencil[i] = (stencil[i] & invMask) | clearVal;
- }
- }
- else {
- /* clear whole buffer without masking */
- const GLuint n = ctx->DrawBuffer->Width * ctx->DrawBuffer->Height;
- GLstencil *stencil = ctx->DrawBuffer->Stencil;
-
-#if STENCIL_BITS==8
- MEMSET(stencil, ctx->Stencil.Clear, n * sizeof(GLstencil) );
-#else
- GLuint i;
- for (i = 0; i < n; i++) {
- stencil[i] = ctx->Stencil.Clear;
- }
-#endif
- }
- }
-}
+ ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
+ ASSERT(rb->_BaseFormat == GL_STENCIL_INDEX);
+ /* compute region to clear */
+ x = ctx->DrawBuffer->_Xmin;
+ y = ctx->DrawBuffer->_Ymin;
+ width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
+ height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
-/**
- * Clear the hardware (in graphics card) stencil buffer.
- * This is done with the Driver.WriteStencilSpan() and Driver.ReadStencilSpan()
- * functions.
- * Actually, if there is a hardware stencil buffer it really should have
- * been cleared in Driver.Clear()! However, if the hardware does not
- * support scissored clears or masked clears (i.e. glStencilMask) then
- * we have to use the span-based functions.
- */
-static void
-clear_hardware_stencil_buffer( GLcontext *ctx )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- ASSERT(swrast->Driver.WriteStencilSpan);
- ASSERT(swrast->Driver.ReadStencilSpan);
-
- if (ctx->Scissor.Enabled) {
- /* clear scissor region only */
- const GLint x = ctx->DrawBuffer->_Xmin;
- const GLint width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
+ if (rb->GetPointer(ctx, rb, 0, 0)) {
+ /* Direct buffer access */
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[0];
- const GLstencil invMask = ~mask;
- const GLstencil clearVal = (ctx->Stencil.Clear & mask);
- GLstencil stencil[MAX_WIDTH];
- GLint i;
- (*swrast->Driver.ReadStencilSpan)(ctx, width, x, y, stencil);
- for (i = 0; i < width; i++) {
- stencil[i] = (stencil[i] & invMask) | clearVal;
+ /* need to mask the clear */
+ GLint i, j;
+ for (i = 0; i < height; i++) {
+ GLubyte *stencil = rb->GetPointer(ctx, rb, x, y + i);
+ for (j = 0; j < width; j++) {
+ stencil[j] = (stencil[j] & invMask) | clearVal;
}
- (*swrast->Driver.WriteStencilSpan)(ctx, width, x, y, stencil, NULL);
}
}
else {
- /* no masking */
- GLstencil stencil[MAX_WIDTH];
- GLint y, i;
- for (i = 0; i < width; i++) {
- stencil[i] = ctx->Stencil.Clear;
+ /* no bit masking */
+ if (width == rb->Width &&
+ rb->InternalFormat == GL_STENCIL_INDEX8_EXT) {
+ /* optimized case */
+ GLubyte *stencil = rb->GetPointer(ctx, rb, x, y);
+ GLuint len = width * height * sizeof(GLubyte);
+ _mesa_memset(stencil, clearVal, len);
}
- for (y = ctx->DrawBuffer->_Ymin; y < ctx->DrawBuffer->_Ymax; y++) {
- (*swrast->Driver.WriteStencilSpan)(ctx, width, x, y, stencil, NULL);
+ else {
+ /* general case */
+ GLint i, j;
+ for (i = 0; i < height; i++) {
+ GLubyte *stencil = rb->GetPointer(ctx, rb, x, y + i);
+ for (j = 0; j < width; j++) {
+ stencil[j] = clearVal;
+ }
+ }
}
}
}
else {
- /* clear whole stencil buffer */
+ /* no direct access */
if (ctx->Stencil.WriteMask[0] != STENCIL_MAX) {
- /* must apply mask to the clear */
- const GLstencil mask = ctx->Stencil.WriteMask[0];
- const GLstencil invMask = ~mask;
- const GLstencil clearVal = (ctx->Stencil.Clear & mask);
- const GLint width = ctx->DrawBuffer->Width;
- const GLint height = ctx->DrawBuffer->Height;
- const GLint x = ctx->DrawBuffer->_Xmin;
- GLint y;
- for (y = 0; y < height; y++) {
- GLstencil stencil[MAX_WIDTH];
- GLint i;
- (*swrast->Driver.ReadStencilSpan)(ctx, width, x, y, stencil);
- for (i = 0; i < width; i++) {
- stencil[i] = (stencil[i] & invMask) | clearVal;
+ /* need to mask the clear */
+ GLint i, j;
+ for (i = 0; i < height; i++) {
+ GLubyte stencil[MAX_WIDTH];
+ rb->GetRow(ctx, rb, width, x, y + i, stencil);
+ for (j = 0; j < width; j++) {
+ stencil[j] = (stencil[j] & invMask) | clearVal;
}
- (*swrast->Driver.WriteStencilSpan)(ctx, width, x, y, stencil, NULL);
+ rb->PutRow(ctx, rb, width, x, y + i, stencil, NULL);
}
}
else {
- /* clear whole buffer without masking */
- const GLint width = ctx->DrawBuffer->Width;
- const GLint height = ctx->DrawBuffer->Height;
- const GLint x = ctx->DrawBuffer->_Xmin;
- GLstencil stencil[MAX_WIDTH];
- GLint y, i;
- for (i = 0; i < width; i++) {
- stencil[i] = ctx->Stencil.Clear;
- }
- for (y = 0; y < height; y++) {
- (*swrast->Driver.WriteStencilSpan)(ctx, width, x, y, stencil, NULL);
- }
+ /* no bit masking */
+ const GLubyte clear8 = clearVal;
+ GLint i;
+ for (i = 0; i < height; i++) {
+ rb->PutMonoRow(ctx, rb, width, x, y + i, &clear8, NULL);
+ }
}
}
}
-
-
-/**
- * Clear the stencil buffer (hardware or software).
- */
-void
-_swrast_clear_stencil_buffer( GLcontext *ctx )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- if (swrast->Driver.WriteStencilSpan) {
- ASSERT(swrast->Driver.ReadStencilSpan);
- clear_hardware_stencil_buffer(ctx);
- }
- else {
- clear_software_stencil_buffer(ctx);
- }
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-15 15:48:48 +0000