/*
* Mesa 3-D graphics library
- * Version: 6.5
+ * Version: 7.1
*
- * Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2007 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"),
*/
-#include "glheader.h"
-#include "context.h"
-#include "imports.h"
+#include "main/glheader.h"
+#include "main/context.h"
+#include "main/imports.h"
#include "s_context.h"
#include "s_depth.h"
* Output: stencil - modified values
*/
static void
-apply_stencil_op( const GLcontext *ctx, GLenum oper, GLuint face,
+apply_stencil_op( const struct gl_context *ctx, GLenum oper, GLuint face,
GLuint n, GLstencil stencil[], const GLubyte mask[] )
{
const GLstencil ref = ctx->Stencil.Ref[face];
* Return: GL_FALSE = all pixels failed, GL_TRUE = zero or more pixels passed.
*/
static GLboolean
-do_stencil_test( GLcontext *ctx, GLuint face, GLuint n, GLstencil stencil[],
+do_stencil_test( struct gl_context *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];
+ const GLstencil r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
+ GLstencil s;
ASSERT(n <= MAX_WIDTH);
allfail = GL_TRUE;
break;
case GL_LESS:
- r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
for (i=0;i<n;i++) {
if (mask[i]) {
s = (GLstencil) (stencil[i] & valueMask);
}
break;
case GL_LEQUAL:
- r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
for (i=0;i<n;i++) {
if (mask[i]) {
s = (GLstencil) (stencil[i] & valueMask);
}
break;
case GL_GREATER:
- r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
for (i=0;i<n;i++) {
if (mask[i]) {
s = (GLstencil) (stencil[i] & valueMask);
}
break;
case GL_GEQUAL:
- r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
for (i=0;i<n;i++) {
if (mask[i]) {
s = (GLstencil) (stencil[i] & valueMask);
}
break;
case GL_EQUAL:
- r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
for (i=0;i<n;i++) {
if (mask[i]) {
s = (GLstencil) (stencil[i] & valueMask);
}
break;
case GL_NOTEQUAL:
- r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask);
for (i=0;i<n;i++) {
if (mask[i]) {
s = (GLstencil) (stencil[i] & valueMask);
}
+/**
+ * Compute the zpass/zfail masks by comparing the pre- and post-depth test
+ * masks.
+ */
+static INLINE void
+compute_pass_fail_masks(GLuint n, const GLubyte origMask[],
+ const GLubyte newMask[],
+ GLubyte passMask[], GLubyte failMask[])
+{
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ ASSERT(newMask[i] == 0 || newMask[i] == 1);
+ passMask[i] = origMask[i] & newMask[i];
+ failMask[i] = origMask[i] & (newMask[i] ^ 1);
+ }
+}
+
/**
* Apply stencil and depth testing to the span of pixels.
*
*/
static GLboolean
-stencil_and_ztest_span(GLcontext *ctx, SWspan *span, GLuint face)
+stencil_and_ztest_span(struct gl_context *ctx, SWspan *span, GLuint face)
{
struct gl_framebuffer *fb = ctx->DrawBuffer;
struct gl_renderbuffer *rb = fb->_StencilBuffer;
/*
* Perform depth buffering, then apply zpass or zfail stencil function.
*/
- GLubyte passmask[MAX_WIDTH], failmask[MAX_WIDTH], oldmask[MAX_WIDTH];
- GLuint i;
+ GLubyte passMask[MAX_WIDTH], failMask[MAX_WIDTH], origMask[MAX_WIDTH];
/* save the current mask bits */
- _mesa_memcpy(oldmask, mask, n * sizeof(GLubyte));
+ memcpy(origMask, mask, n * sizeof(GLubyte));
/* apply the depth test */
_swrast_depth_test_span(ctx, span);
- /* Set the stencil pass/fail flags according to result of depth testing.
- * if oldmask[i] == 0 then
- * Don't touch the stencil value
- * else if oldmask[i] and newmask[i] then
- * Depth test passed
- * else
- * assert(oldmask[i] && !newmask[i])
- * Depth test failed
- * endif
- */
- 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);
- }
+ compute_pass_fail_masks(n, origMask, mask, passMask, failMask);
/* apply the pass and fail operations */
if (ctx->Stencil.ZFailFunc[face] != GL_KEEP) {
apply_stencil_op( ctx, ctx->Stencil.ZFailFunc[face], face,
- n, stencil, failmask );
+ n, stencil, failMask );
}
if (ctx->Stencil.ZPassFunc[face] != GL_KEEP) {
apply_stencil_op( ctx, ctx->Stencil.ZPassFunc[face], face,
- n, stencil, passmask );
+ n, stencil, passMask );
}
}
* mask - array [n] of flag: 1=apply operator, 0=don't apply operator
*/
static void
-apply_stencil_op_to_pixels( GLcontext *ctx,
+apply_stencil_op_to_pixels( struct gl_context *ctx,
GLuint n, const GLint x[], const GLint y[],
GLenum oper, GLuint face, const GLubyte mask[] )
{
* \return GL_FALSE = all pixels failed, GL_TRUE = zero or more pixels passed.
*/
static GLboolean
-stencil_test_pixels( GLcontext *ctx, GLuint face, GLuint n,
+stencil_test_pixels( struct gl_context *ctx, GLuint face, GLuint n,
const GLint x[], const GLint y[], GLubyte mask[] )
{
const struct gl_framebuffer *fb = ctx->DrawBuffer;
* GL_TRUE - one or more fragments passed the testing
*/
static GLboolean
-stencil_and_ztest_pixels( GLcontext *ctx, SWspan *span, GLuint face )
+stencil_and_ztest_pixels( struct gl_context *ctx, SWspan *span, GLuint face )
{
+ GLubyte passMask[MAX_WIDTH], failMask[MAX_WIDTH], origMask[MAX_WIDTH];
struct gl_framebuffer *fb = ctx->DrawBuffer;
struct gl_renderbuffer *rb = fb->_StencilBuffer;
const GLuint n = span->end;
if (!rb->GetPointer(ctx, rb, 0, 0)) {
/* No direct access */
GLstencil stencil[MAX_WIDTH];
- GLubyte origMask[MAX_WIDTH];
ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
_swrast_get_values(ctx, rb, n, x, y, stencil, sizeof(GLubyte));
- _mesa_memcpy(origMask, mask, n * sizeof(GLubyte));
+ memcpy(origMask, mask, n * sizeof(GLubyte));
(void) do_stencil_test(ctx, face, n, stencil, mask);
n, stencil, mask);
}
else {
+ GLubyte tmpMask[MAX_WIDTH];
+ memcpy(tmpMask, mask, n * sizeof(GLubyte));
+
_swrast_depth_test_span(ctx, span);
+ compute_pass_fail_masks(n, tmpMask, mask, passMask, failMask);
+
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[face], face,
- n, stencil, failmask);
+ n, stencil, failMask);
}
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[face], face,
- n, stencil, passmask);
+ n, stencil, passMask);
}
}
ctx->Stencil.ZPassFunc[face], face, mask);
}
else {
- GLubyte passmask[MAX_WIDTH], failmask[MAX_WIDTH], oldmask[MAX_WIDTH];
- GLuint i;
-
- _mesa_memcpy(oldmask, mask, n * sizeof(GLubyte));
+ memcpy(origMask, mask, n * sizeof(GLubyte));
_swrast_depth_test_span(ctx, span);
- 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);
- }
+ compute_pass_fail_masks(n, origMask, mask, passMask, failMask);
if (ctx->Stencil.ZFailFunc[face] != GL_KEEP) {
apply_stencil_op_to_pixels(ctx, n, x, y,
ctx->Stencil.ZFailFunc[face],
- face, failmask);
+ face, failMask);
}
if (ctx->Stencil.ZPassFunc[face] != GL_KEEP) {
apply_stencil_op_to_pixels(ctx, n, x, y,
ctx->Stencil.ZPassFunc[face],
- face, passmask);
+ face, passMask);
}
}
* GL_FALSE = all fragments failed.
*/
GLboolean
-_swrast_stencil_and_ztest_span(GLcontext *ctx, SWspan *span)
+_swrast_stencil_and_ztest_span(struct gl_context *ctx, SWspan *span)
{
- /* span->facing can only be non-zero if using two-sided stencil */
- ASSERT(ctx->Stencil._TestTwoSide || span->facing == 0);
+ const GLuint face = (span->facing == 0) ? 0 : ctx->Stencil._BackFace;
+
if (span->arrayMask & SPAN_XY)
- return stencil_and_ztest_pixels(ctx, span, span->facing);
+ return stencil_and_ztest_pixels(ctx, span, face);
else
- return stencil_and_ztest_span(ctx, span, span->facing);
+ return stencil_and_ztest_span(ctx, span, face);
}
* Output: stencil - the array of stencil values
*/
void
-_swrast_read_stencil_span(GLcontext *ctx, struct gl_renderbuffer *rb,
+_swrast_read_stencil_span(struct gl_context *ctx, struct gl_renderbuffer *rb,
GLint n, GLint x, GLint y, GLstencil stencil[])
{
if (y < 0 || y >= (GLint) rb->Height ||
* stencil - the array of stencil values
*/
void
-_swrast_write_stencil_span(GLcontext *ctx, GLint n, GLint x, GLint y,
+_swrast_write_stencil_span(struct gl_context *ctx, GLint n, GLint x, GLint y,
const GLstencil stencil[] )
{
struct gl_framebuffer *fb = ctx->DrawBuffer;
* Clear the stencil buffer.
*/
void
-_swrast_clear_stencil_buffer( GLcontext *ctx, struct gl_renderbuffer *rb )
+_swrast_clear_stencil_buffer( struct gl_context *ctx, struct gl_renderbuffer *rb )
{
const GLubyte stencilBits = ctx->DrawBuffer->Visual.stencilBits;
const GLuint mask = ctx->Stencil.WriteMask[0];
const GLuint stencilMax = (1 << stencilBits) - 1;
GLint x, y, width, height;
- if (!rb || mask == 0 || !rb->Data)
+ if (!rb || mask == 0)
return;
ASSERT(rb->DataType == GL_UNSIGNED_BYTE ||
/* Note: bottom-to-top raster assumed! */
GLubyte *stencil = (GLubyte *) rb->GetPointer(ctx, rb, x, y);
GLuint len = width * height * sizeof(GLubyte);
- _mesa_memset(stencil, clearVal, len);
+ memset(stencil, clearVal, len);
}
else {
/* general case */
for (i = 0; i < height; i++) {
GLvoid *stencil = rb->GetPointer(ctx, rb, x, y + i);
if (rb->DataType == GL_UNSIGNED_BYTE) {
- _mesa_memset(stencil, clearVal, width);
+ memset(stencil, clearVal, width);
}
else {
_mesa_memset16((short unsigned int*) stencil, clearVal, width);
projects / mesa.git / blobdiff