-/* $Id: s_stencil.c,v 1.2 2000/11/05 18:24:40 keithw Exp $ */
+/* $Id: s_stencil.c,v 1.20 2002/02/04 15:59:30 brianp Exp $ */
/*
* Mesa 3-D graphics library
- * Version: 3.5
- *
- * Copyright (C) 1999-2000 Brian Paul All Rights Reserved.
- *
+ * Version: 4.1
+ *
+ * Copyright (C) 1999-2002 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"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
- *
+ *
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
- *
+ *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
#include "s_context.h"
#include "s_depth.h"
-#include "s_pb.h"
#include "s_stencil.h"
-
-
/* Stencil Logic:
IF stencil test fails THEN
- Apply fail-op to stencil value
+ Apply fail-op to stencil value
Don't write the pixel (RGBA,Z)
ELSE
IF doing depth test && depth test fails THEN
- Apply zfail-op to stencil value
+ Apply zfail-op to stencil value
Write RGBA and Z to appropriate buffers
ELSE
Apply zpass-op to stencil value
*/
-
-
/*
* 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
* 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 n, GLstencil stencil[], const GLubyte mask[] )
{
const GLstencil ref = ctx->Stencil.Ref;
const GLstencil wrtmask = ctx->Stencil.WriteMask;
}
break;
default:
- gl_problem(ctx, "Bad stencil op in apply_stencil_op");
+ _mesa_problem(ctx, "Bad stencil op in apply_stencil_op");
}
}
-/*
+/**
* Apply stencil test to an array of stencil values (before depth buffering).
* Input: n - number of pixels in the array
* stencil - array of [n] stencil values
do_stencil_test( GLcontext *ctx, GLuint n, GLstencil stencil[],
GLubyte mask[] )
{
- GLubyte fail[PB_SIZE];
+ GLubyte fail[MAX_WIDTH];
GLboolean allfail = GL_FALSE;
GLuint i;
GLstencil r, s;
- ASSERT(n <= PB_SIZE);
+ ASSERT(n <= MAX_WIDTH);
/*
* Perform stencil test. The results of this operation are stored
*/
switch (ctx->Stencil.Function) {
case GL_NEVER:
- /* always fail */
+ /* never pass; always fail */
for (i=0;i<n;i++) {
if (mask[i]) {
mask[i] = 0;
}
break;
default:
- gl_problem(ctx, "Bad stencil func in gl_stencil_span");
+ _mesa_problem(ctx, "Bad stencil func in gl_stencil_span");
return 0;
}
-
-/*
- * 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)
{
- 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->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) {
/* 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.
*/
MEMCPY(oldmask, mask, n * sizeof(GLubyte));
/* apply the depth test */
- _mesa_depth_test_span(ctx, n, x, y, z, mask);
+ _mesa_depth_test_span(ctx, span);
/* Set the stencil pass/fail flags according to result of depth testing.
* if oldmask[i] == 0 then
}
}
- 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
-_mesa_stencil_and_ztest_span( GLcontext *ctx, GLuint n, GLint x, GLint y,
- const GLdepth z[], GLubyte mask[] )
-{
- GLstencil stencilRow[MAX_WIDTH];
- GLstencil *stencil;
- GLboolean result;
-
- ASSERT(ctx->Stencil.Enabled);
- ASSERT(n <= MAX_WIDTH);
-
- /* Get initial stencil values */
- if (ctx->Driver.WriteStencilSpan) {
- ASSERT(ctx->Driver.ReadStencilSpan);
- /* Get stencil values from the hardware stencil buffer */
- (*ctx->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 );
-
- if (ctx->Driver.WriteStencilSpan) {
- /* Write updated stencil values into hardware stencil buffer */
- (ctx->Driver.WriteStencilSpan)(ctx, n, x, y, stencil, mask );
+ /*
+ * 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 );
}
-
- return result;
+
+ span->writeAll = GL_FALSE;
+
+ 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
const GLstencil invmask = (GLstencil) (~ctx->Stencil.WriteMask);
GLuint i;
- ASSERT(!ctx->Driver.WriteStencilSpan); /* software stencil buffer only! */
+ ASSERT(!SWRAST_CONTEXT(ctx)->Driver.WriteStencilSpan); /* software stencil buffer only! */
switch (oper) {
case GL_KEEP:
}
break;
default:
- gl_problem(ctx, "Bad stencilop in apply_stencil_op_to_pixels");
+ _mesa_problem(ctx, "Bad stencilop in apply_stencil_op_to_pixels");
}
}
-/*
+/**
* 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,
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;
- ASSERT(!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
}
break;
default:
- gl_problem(ctx, "Bad stencil func in gl_stencil_pixels");
+ _mesa_problem(ctx, "Bad stencil func in gl_stencil_pixels");
return 0;
}
-/*
+/**
* Apply stencil and depth testing to an array of pixels.
* This is used both for software and hardware stencil buffers.
*
* The comments in this function are a bit sparse but the code is
* almost identical to stencil_and_ztest_span(), which is well
* commented.
- *
+ *
* Input: n - number of pixels in the array
* x, y - array of [n] pixel positions
* 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 )
{
+ const GLuint n = span->end;
+ const GLint *x = span->xArray;
+ const GLint *y = span->yArray;
+ GLubyte *mask = span->mask;
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ ASSERT(span->arrayMask & SPAN_XY);
ASSERT(ctx->Stencil.Enabled);
- ASSERT(n <= PB_SIZE);
+ ASSERT(n <= MAX_WIDTH);
- if (ctx->Driver.WriteStencilPixels) {
+ if (swrast->Driver.WriteStencilPixels) {
/*** Hardware stencil buffer ***/
- GLstencil stencil[PB_SIZE];
- GLubyte mask[PB_SIZE];
+ GLstencil stencil[MAX_WIDTH];
+ GLubyte origMask[MAX_WIDTH];
- ASSERT(ctx->Driver.ReadStencilPixels);
- (*ctx->Driver.ReadStencilPixels)(ctx, n, x, y, stencil);
+ ASSERT(!ctx->DrawBuffer->UseSoftwareStencilBuffer);
+ ASSERT(swrast->Driver.ReadStencilPixels);
+ (*swrast->Driver.ReadStencilPixels)(ctx, n, x, y, stencil);
+ MEMCPY(origMask, mask, n * sizeof(GLubyte));
- if (do_stencil_test( ctx, n, stencil, mask ) == GL_FALSE) {
- /* all fragments failed the stencil test, we're done. */
- return GL_FALSE;
- }
+ (void) do_stencil_test(ctx, 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, n, stencil, mask);
}
else {
- GLubyte passmask[PB_SIZE], failmask[PB_SIZE], oldmask[PB_SIZE];
- GLuint i;
-
- MEMCPY(oldmask, mask, n * sizeof(GLubyte));
-
- _mesa_depth_test_pixels(ctx, n, x, y, z, mask);
-
- for (i=0;i<n;i++) {
- ASSERT(mask[i] == 0 || mask[i] == 1);
- passmask[i] = oldmask[i] & mask[i];
- failmask[i] = oldmask[i] & (mask[i] ^ 1);
- }
+ _mesa_depth_test_span(ctx, span);
if (ctx->Stencil.ZFailFunc != GL_KEEP) {
- apply_stencil_op( ctx, ctx->Stencil.ZFailFunc, n, stencil, failmask );
+ 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,
+ n, stencil, failmask);
}
if (ctx->Stencil.ZPassFunc != GL_KEEP) {
- apply_stencil_op( ctx, ctx->Stencil.ZPassFunc, n, stencil, passmask );
+ 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,
+ n, stencil, passmask);
}
}
/* Write updated stencil values into hardware stencil buffer */
- (ctx->Driver.WriteStencilPixels)(ctx, n, x, y, stencil, mask );
+ (swrast->Driver.WriteStencilPixels)(ctx, n, x, y, stencil, origMask);
return GL_TRUE;
-
}
else {
/*** Software stencil buffer ***/
+ ASSERT(ctx->DrawBuffer->UseSoftwareStencilBuffer);
+
if (stencil_test_pixels(ctx, 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 );
+ apply_stencil_op_to_pixels(ctx, n, x, y,
+ ctx->Stencil.ZPassFunc, 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);
+ _mesa_depth_test_span(ctx, span);
for (i=0;i<n;i++) {
ASSERT(mask[i] == 0 || mask[i] == 1);
}
if (ctx->Stencil.ZFailFunc != GL_KEEP) {
- apply_stencil_op_to_pixels( ctx, n, x, y,
- ctx->Stencil.ZFailFunc, failmask );
+ apply_stencil_op_to_pixels(ctx, n, x, y,
+ ctx->Stencil.ZFailFunc, failmask);
}
if (ctx->Stencil.ZPassFunc != GL_KEEP) {
- apply_stencil_op_to_pixels( ctx, n, x, y,
- ctx->Stencil.ZPassFunc, passmask );
+ apply_stencil_op_to_pixels(ctx, n, x, y,
+ ctx->Stencil.ZPassFunc, passmask);
}
}
}
+/**
+ * /return GL_TRUE = one or more fragments passed,
+ * GL_FALSE = all fragments failed.
+ */
+GLboolean
+_mesa_stencil_and_ztest_span(GLcontext *ctx, struct sw_span *span)
+{
+ if (span->arrayMask & SPAN_XY)
+ return stencil_and_ztest_pixels(ctx, span);
+ else
+ return stencil_and_ztest_span(ctx, span);
+}
-/*
+
+/**
* Return a span of stencil values from the stencil buffer.
* Used for glRead/CopyPixels
* Input: n - how many pixels
_mesa_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) {
/* span is completely outside framebuffer */
ASSERT(n >= 0);
- if (ctx->Driver.ReadStencilSpan) {
- (*ctx->Driver.ReadStencilSpan)( ctx, (GLuint) n, x, y, stencil );
+ 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 );
-/*
+/**
* Write a span of stencil values to the stencil buffer.
* Used for glDraw/CopyPixels
* Input: n - how many pixels
_mesa_write_stencil_span( GLcontext *ctx, GLint n, GLint x, GLint y,
const GLstencil stencil[] )
{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ const GLstencil *ssrc = stencil;
+
if (y < 0 || y >= ctx->DrawBuffer->Height ||
x + n <= 0 || x >= ctx->DrawBuffer->Width) {
/* span is completely outside framebuffer */
GLint dx = -x;
x = 0;
n -= dx;
- stencil += dx;
+ ssrc += dx;
}
if (x + n > ctx->DrawBuffer->Width) {
GLint dx = x + n - ctx->DrawBuffer->Width;
return;
}
- if (ctx->Driver.WriteStencilSpan) {
- (*ctx->Driver.WriteStencilSpan)( ctx, n, x, y, stencil, NULL );
+ 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, stencil, n * sizeof(GLstencil) );
+ MEMCPY( s, ssrc, n * sizeof(GLstencil) );
#else
GLuint i;
for (i=0;i<n;i++)
- s[i] = stencil[i];
+ s[i] = ssrc[i];
#endif
}
}
-/*
+/**
* Allocate a new stencil buffer. If there's an old one it will be
* deallocated first. The new stencil buffer will be uninitialized.
*/
if (!ctx->DrawBuffer->Stencil) {
/* out of memory */
/* _mesa_set_enable( ctx, GL_STENCIL_TEST, GL_FALSE ); */
- gl_error( ctx, GL_OUT_OF_MEMORY, "_mesa_alloc_stencil_buffer" );
+ _mesa_error( ctx, GL_OUT_OF_MEMORY, "_mesa_alloc_stencil_buffer" );
}
}
-/*
+/**
* Clear the software (malloc'd) stencil buffer.
*/
static void
clear_software_stencil_buffer( GLcontext *ctx )
{
- if (ctx->Visual.StencilBits==0 || !ctx->DrawBuffer->Stencil) {
+ if (ctx->Visual.stencilBits==0 || !ctx->DrawBuffer->Stencil) {
/* no stencil buffer */
return;
}
if (ctx->Scissor.Enabled) {
/* clear scissor region only */
- const GLint width = ctx->DrawBuffer->Xmax - ctx->DrawBuffer->Xmin;
+ const GLint width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
if (ctx->Stencil.WriteMask != STENCIL_MAX) {
/* must apply mask to the clear */
GLint y;
- for (y = ctx->DrawBuffer->Ymin; y < ctx->DrawBuffer->Ymax; y++) {
+ for (y = ctx->DrawBuffer->_Ymin; y < ctx->DrawBuffer->_Ymax; y++) {
const GLstencil mask = ctx->Stencil.WriteMask;
const GLstencil invMask = ~mask;
const GLstencil clearVal = (ctx->Stencil.Clear & mask);
- GLstencil *stencil = STENCIL_ADDRESS( ctx->DrawBuffer->Xmin, y );
+ 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 );
+ 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
-/*
+/**
* Clear the hardware (in graphics card) stencil buffer.
* This is done with the Driver.WriteStencilSpan() and Driver.ReadStencilSpan()
* functions.
static void
clear_hardware_stencil_buffer( GLcontext *ctx )
{
- ASSERT(ctx->Driver.WriteStencilSpan);
- ASSERT(ctx->Driver.ReadStencilSpan);
+ 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;
+ const GLint x = ctx->DrawBuffer->_Xmin;
+ const GLint width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
if (ctx->Stencil.WriteMask != STENCIL_MAX) {
/* must apply mask to the clear */
GLint y;
- for (y = ctx->DrawBuffer->Ymin; y < ctx->DrawBuffer->Ymax; y++) {
+ for (y = ctx->DrawBuffer->_Ymin; y < ctx->DrawBuffer->_Ymax; y++) {
const GLstencil mask = ctx->Stencil.WriteMask;
const GLstencil invMask = ~mask;
const GLstencil clearVal = (ctx->Stencil.Clear & mask);
GLstencil stencil[MAX_WIDTH];
GLint i;
- (*ctx->Driver.ReadStencilSpan)(ctx, x, y, width, stencil);
+ (*swrast->Driver.ReadStencilSpan)(ctx, width, x, y, stencil);
for (i = 0; i < width; i++) {
stencil[i] = (stencil[i] & invMask) | clearVal;
}
- (*ctx->Driver.WriteStencilSpan)(ctx, x, y, width, stencil, NULL);
+ (*swrast->Driver.WriteStencilSpan)(ctx, width, x, y, stencil, NULL);
}
}
else {
for (i = 0; i < width; i++) {
stencil[i] = ctx->Stencil.Clear;
}
- for (y = ctx->DrawBuffer->Ymin; y < ctx->DrawBuffer->Ymax; y++) {
- (*ctx->Driver.WriteStencilSpan)(ctx, x, y, width, stencil, NULL);
+ for (y = ctx->DrawBuffer->_Ymin; y < ctx->DrawBuffer->_Ymax; y++) {
+ (*swrast->Driver.WriteStencilSpan)(ctx, width, x, y, stencil, NULL);
}
}
}
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;
+ const GLint x = ctx->DrawBuffer->_Xmin;
GLint y;
for (y = 0; y < height; y++) {
GLstencil stencil[MAX_WIDTH];
- GLuint i;
- (*ctx->Driver.ReadStencilSpan)(ctx, x, y, width, stencil);
+ GLint i;
+ (*swrast->Driver.ReadStencilSpan)(ctx, width, x, y, stencil);
for (i = 0; i < width; i++) {
stencil[i] = (stencil[i] & invMask) | clearVal;
}
- (*ctx->Driver.WriteStencilSpan)(ctx, x, y, width, stencil, NULL);
+ (*swrast->Driver.WriteStencilSpan)(ctx, width, x, y, stencil, NULL);
}
}
else {
/* clear whole buffer without masking */
const GLint width = ctx->DrawBuffer->Width;
- const GLint height = ctx->DrawBuffer->Width;
- const GLint x = ctx->DrawBuffer->Xmin;
+ 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++) {
- (*ctx->Driver.WriteStencilSpan)(ctx, x, y, width, stencil, NULL);
+ (*swrast->Driver.WriteStencilSpan)(ctx, width, x, y, stencil, NULL);
}
}
}
-/*
- * Clear the stencil buffer.
+/**
+ * Clear the stencil buffer (hardware or software).
*/
void
_mesa_clear_stencil_buffer( GLcontext *ctx )
{
- if (ctx->Driver.WriteStencilSpan) {
- ASSERT(ctx->Driver.ReadStencilSpan);
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ if (swrast->Driver.WriteStencilSpan) {
+ ASSERT(swrast->Driver.ReadStencilSpan);
clear_hardware_stencil_buffer(ctx);
}
else {
clear_software_stencil_buffer(ctx);
}
}
-
projects / mesa.git / blobdiff