-/* $Id: s_depth.c,v 1.13 2002/01/28 00:07:33 brianp Exp $ */
-
/*
* Mesa 3-D graphics library
- * Version: 4.1
+ * Version: 5.1
*
- * Copyright (C) 1999-2002 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2003 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 "macros.h"
-#include "mem.h"
+#include "imports.h"
#include "s_depth.h"
#include "s_context.h"
-#include "s_pb.h"
-
-
-/*
+/**
* Return address of depth buffer value for given window coord.
*/
GLvoid *
-_mesa_zbuffer_address(GLcontext *ctx, GLint x, GLint y)
+_swrast_zbuffer_address(GLcontext *ctx, GLint x, GLint y)
{
if (ctx->Visual.depthBits <= 16)
- return (GLushort *) ctx->DrawBuffer->DepthBuffer + ctx->DrawBuffer->Width * y + x;
+ return (GLushort *) ctx->DrawBuffer->DepthBuffer
+ + ctx->DrawBuffer->Width * y + x;
else
- return (GLuint *) ctx->DrawBuffer->DepthBuffer + ctx->DrawBuffer->Width * y + x;
+ return (GLuint *) ctx->DrawBuffer->DepthBuffer
+ + ctx->DrawBuffer->Width * y + x;
}
* Return: number of fragments which pass the test.
*/
static GLuint
-depth_test_span16( GLcontext *ctx, GLuint n, GLint x, GLint y,
+depth_test_span16( GLcontext *ctx, GLuint n,
GLushort zbuffer[], const GLdepth z[], GLubyte mask[] )
{
GLuint passed = 0;
}
break;
case GL_NEVER:
- BZERO(mask, n * sizeof(GLubyte));
+ _mesa_bzero(mask, n * sizeof(GLubyte));
break;
default:
_mesa_problem(ctx, "Bad depth func in depth_test_span16");
static GLuint
-depth_test_span32( GLcontext *ctx, GLuint n, GLint x, GLint y,
+depth_test_span32( GLcontext *ctx, GLuint n,
GLuint zbuffer[], const GLdepth z[], GLubyte mask[] )
{
GLuint passed = 0;
}
break;
case GL_NEVER:
- BZERO(mask, n * sizeof(GLubyte));
+ _mesa_bzero(mask, n * sizeof(GLubyte));
break;
default:
_mesa_problem(ctx, "Bad depth func in depth_test_span32");
/*
* Apply depth test to span of fragments. Hardware or software z buffer.
*/
-GLuint
-_old_depth_test_span( GLcontext *ctx, GLuint n, GLint x, GLint y,
- const GLdepth z[], GLubyte mask[] )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- if (swrast->Driver.ReadDepthSpan) {
- /* hardware-based depth buffer */
- GLdepth zbuffer[MAX_WIDTH];
- GLuint passed;
- (*swrast->Driver.ReadDepthSpan)(ctx, n, x, y, zbuffer);
- passed = depth_test_span32(ctx, n, x, y, zbuffer, z, mask);
- assert(swrast->Driver.WriteDepthSpan);
- (*swrast->Driver.WriteDepthSpan)(ctx, n, x, y, zbuffer, mask);
- return passed;
- }
- else {
- /* software depth buffer */
- if (ctx->Visual.depthBits <= 16) {
- GLushort *zptr = (GLushort *) Z_ADDRESS16(ctx, x, y);
- GLuint passed = depth_test_span16(ctx, n, x, y, zptr, z, mask);
- return passed;
- }
- else {
- GLuint *zptr = (GLuint *) Z_ADDRESS32(ctx, x, y);
- GLuint passed = depth_test_span32(ctx, n, x, y, zptr, z, mask);
- return passed;
- }
- }
-}
-
-/*
- * Apply depth test to span of fragments. Hardware or software z buffer.
- */
-GLuint
-_mesa_depth_test_span( GLcontext *ctx, struct sw_span *span)
+static GLuint
+depth_test_span( GLcontext *ctx, struct sw_span *span)
{
+ const GLint x = span->x;
+ const GLint y = span->y;
+ const GLuint n = span->end;
SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ ASSERT((span->arrayMask & SPAN_XY) == 0);
ASSERT(span->arrayMask & SPAN_Z);
if (swrast->Driver.ReadDepthSpan) {
/* hardware-based depth buffer */
GLdepth zbuffer[MAX_WIDTH];
GLuint passed;
- (*swrast->Driver.ReadDepthSpan)(ctx, span->end, span->x, span->y, zbuffer);
- passed = depth_test_span32(ctx, span->end, span->x, span->y,
- zbuffer, span->zArray, span->mask);
+ (*swrast->Driver.ReadDepthSpan)(ctx, n, x, y, zbuffer);
+ passed = depth_test_span32(ctx, n, zbuffer, span->array->z,
+ span->array->mask);
ASSERT(swrast->Driver.WriteDepthSpan);
- (*swrast->Driver.WriteDepthSpan)(ctx, span->end, span->x, span->y, zbuffer, span->mask);
- if (passed < span->end)
+ (*swrast->Driver.WriteDepthSpan)(ctx, n, x, y, zbuffer,
+ span->array->mask);
+ if (passed < n)
span->writeAll = GL_FALSE;
return passed;
}
GLuint passed;
/* software depth buffer */
if (ctx->Visual.depthBits <= 16) {
- GLushort *zptr = (GLushort *) Z_ADDRESS16(ctx, span->x, span->y);
- passed = depth_test_span16(ctx, span->end, span->x, span->y, zptr, span->zArray, span->mask);
+ GLushort *zptr = (GLushort *) Z_ADDRESS16(ctx, x, y);
+ passed = depth_test_span16(ctx, n, zptr, span->array->z, span->array->mask);
}
else {
- GLuint *zptr = (GLuint *) Z_ADDRESS32(ctx, span->x, span->y);
- passed = depth_test_span32(ctx, span->end, span->x, span->y, zptr, span->zArray, span->mask);
+ GLuint *zptr = (GLuint *) Z_ADDRESS32(ctx, x, y);
+ passed = depth_test_span32(ctx, n, zptr, span->array->z, span->array->mask);
}
- if (passed < span->end)
+#if 1
+ if (passed < span->end) {
span->writeAll = GL_FALSE;
+ }
+#else
+ /* this causes a glDrawPixels(GL_DEPTH_COMPONENT) conformance failure */
+ if (passed < span->end) {
+ span->writeAll = GL_FALSE;
+ if (passed == 0) {
+ span->end = 0;
+ return 0;
+ }
+ while (span->end > 0 && span->mask[span->end - 1] == 0)
+ span->end --;
+ }
+#endif
return passed;
}
}
break;
case GL_NEVER:
/* depth test never passes */
- BZERO(mask, n * sizeof(GLubyte));
+ _mesa_bzero(mask, n * sizeof(GLubyte));
break;
default:
_mesa_problem(ctx, "Bad depth func in software_depth_test_pixels");
break;
case GL_NEVER:
/* depth test never passes */
- BZERO(mask, n * sizeof(GLubyte));
+ _mesa_bzero(mask, n * sizeof(GLubyte));
break;
default:
_mesa_problem(ctx, "Bad depth func in software_depth_test_pixels");
break;
case GL_NEVER:
/* depth test never passes */
- BZERO(mask, n * sizeof(GLubyte));
+ _mesa_bzero(mask, n * sizeof(GLubyte));
break;
default:
_mesa_problem(ctx, "Bad depth func in hardware_depth_test_pixels");
-void
-_mesa_depth_test_pixels( GLcontext *ctx,
- GLuint n, const GLint x[], const GLint y[],
- const GLdepth z[], GLubyte mask[] )
+static GLuint
+depth_test_pixels( GLcontext *ctx, struct sw_span *span )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ const GLuint n = span->end;
+ const GLint *x = span->array->x;
+ const GLint *y = span->array->y;
+ const GLdepth *z = span->array->z;
+ GLubyte *mask = span->array->mask;
+
if (swrast->Driver.ReadDepthPixels) {
/* read depth values from hardware Z buffer */
- GLdepth zbuffer[PB_SIZE];
+ GLdepth zbuffer[MAX_WIDTH];
(*swrast->Driver.ReadDepthPixels)(ctx, n, x, y, zbuffer);
hardware_depth_test_pixels( ctx, n, zbuffer, z, mask );
else
software_depth_test_pixels32(ctx, n, x, y, z, mask);
}
+ return n; /* not really correct, but OK */
+}
+
+
+/**
+ * Apply depth (Z) buffer testing to the span.
+ * \return approx number of pixels that passed (only zero is reliable)
+ */
+GLuint
+_swrast_depth_test_span( GLcontext *ctx, struct sw_span *span)
+{
+ if (span->arrayMask & SPAN_XY)
+ return depth_test_pixels(ctx, span);
+ else
+ return depth_test_span(ctx, span);
}
+/**
+ * GL_EXT_depth_bounds_test extension.
+ * Discard fragments depending on whether the corresponding Z-buffer
+ * values are outside the depth bounds test range.
+ * Note: we test the Z buffer values, not the fragment Z values!
+ * \return GL_TRUE if any fragments pass, GL_FALSE if no fragments pass
+ */
+GLboolean
+_swrast_depth_bounds_test( GLcontext *ctx, struct sw_span *span )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLdepth zMin = (GLdepth) (ctx->Depth.BoundsMin * ctx->DepthMaxF + 0.5F);
+ GLdepth zMax = (GLdepth) (ctx->Depth.BoundsMax * ctx->DepthMaxF + 0.5F);
+ GLubyte *mask = span->array->mask;
+ GLuint i;
+ GLboolean anyPass = GL_FALSE;
+
+ if (swrast->Driver.ReadDepthPixels) {
+ /* read depth values from hardware Z buffer */
+ GLdepth zbuffer[MAX_WIDTH];
+ ASSERT(span->end <= MAX_WIDTH);
+ if (span->arrayMask & SPAN_XY)
+ (*swrast->Driver.ReadDepthPixels)(ctx, span->end, span->array->x,
+ span->array->y, zbuffer);
+ else
+ (*swrast->Driver.ReadDepthSpan)(ctx, span->end, span->x, span->y,
+ zbuffer);
+ for (i = 0; i < span->end; i++) {
+ if (mask[i]) {
+ if (zbuffer[i] < zMin || zbuffer[i] > zMax)
+ mask[i] = GL_FALSE;
+ else
+ anyPass = GL_TRUE;
+ }
+ }
+ }
+ else {
+ /* software Z buffer */
+ if (span->arrayMask & SPAN_XY) {
+ if (ctx->Visual.depthBits <= 16) {
+ /* 16 bits / Z */
+ for (i = 0; i < span->end; i++) {
+ if (mask[i]) {
+ const GLushort *zPtr = Z_ADDRESS16(ctx, span->array->x[i],
+ span->array->y[i]);
+ if (*zPtr < zMin || *zPtr > zMax)
+ mask[i] = GL_FALSE;
+ else
+ anyPass = GL_TRUE;
+ }
+ }
+ }
+ else {
+ /* 32 bits / Z */
+ for (i = 0; i < span->end; i++) {
+ if (mask[i]) {
+ const GLuint *zPtr = Z_ADDRESS32(ctx, span->array->x[i],
+ span->array->y[i]);
+ if (*zPtr < zMin || *zPtr > zMax)
+ mask[i] = GL_FALSE;
+ else
+ anyPass = GL_TRUE;
+ }
+ }
+ }
+ }
+ else {
+ if (ctx->Visual.depthBits <= 16) {
+ /* 16 bits / Z */
+ const GLushort *zPtr = Z_ADDRESS16(ctx, span->x, span->y);
+ for (i = 0; i < span->end; i++) {
+ if (mask[i]) {
+ if (zPtr[i] < zMin || zPtr[i] > zMax)
+ mask[i] = GL_FALSE;
+ else
+ anyPass = GL_TRUE;
+ }
+ }
+ }
+ else {
+ /* 32 bits / Z */
+ const GLuint *zPtr = Z_ADDRESS32(ctx, span->x, span->y);
+ for (i = 0; i < span->end; i++) {
+ if (mask[i]) {
+ if (zPtr[i] < zMin || zPtr[i] > zMax)
+ mask[i] = GL_FALSE;
+ else
+ anyPass = GL_TRUE;
+ }
+ }
+ }
+ }
+ }
+ return anyPass;
+}
/**********************************************************************/
-/*
+/**
* Read a span of depth values from the depth buffer.
* This function does clipping before calling the device driver function.
*/
void
-_mesa_read_depth_span( GLcontext *ctx,
+_swrast_read_depth_span( GLcontext *ctx,
GLint n, GLint x, GLint y, GLdepth depth[] )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
- if (y < 0 || y >= ctx->DrawBuffer->Height ||
- x + (GLint) n <= 0 || x >= ctx->DrawBuffer->Width) {
+ if (y < 0 || y >= (GLint) ctx->DrawBuffer->Height ||
+ x + (GLint) n <= 0 || x >= (GLint) ctx->DrawBuffer->Width) {
/* span is completely outside framebuffer */
GLint i;
for (i = 0; i < n; i++)
n -= dx;
depth += dx;
}
- if (x + n > ctx->DrawBuffer->Width) {
- GLint dx = x + n - ctx->DrawBuffer->Width;
+ if (x + n > (GLint) ctx->DrawBuffer->Width) {
+ GLint dx = x + n - (GLint) ctx->DrawBuffer->Width;
GLint i;
for (i = 0; i < dx; i++)
depth[n - i - 1] = 0;
}
else {
/* no depth buffer */
- BZERO(depth, n * sizeof(GLfloat));
+ _mesa_bzero(depth, n * sizeof(GLfloat));
}
}
-/*
+/**
* Return a span of depth values from the depth buffer as floats in [0,1].
* This is used for both hardware and software depth buffers.
* Input: n - how many pixels
* Output: depth - the array of depth values
*/
void
-_mesa_read_depth_span_float( GLcontext *ctx,
+_swrast_read_depth_span_float( GLcontext *ctx,
GLint n, GLint x, GLint y, GLfloat depth[] )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
const GLfloat scale = 1.0F / ctx->DepthMaxF;
- if (y < 0 || y >= ctx->DrawBuffer->Height ||
- x + (GLint) n <= 0 || x >= ctx->DrawBuffer->Width) {
+ if (y < 0 || y >= (GLint) ctx->DrawBuffer->Height ||
+ x + (GLint) n <= 0 || x >= (GLint) ctx->DrawBuffer->Width) {
/* span is completely outside framebuffer */
GLint i;
for (i = 0; i < n; i++)
n -= dx;
x = 0;
}
- if (x + n > ctx->DrawBuffer->Width) {
- GLint dx = x + n - ctx->DrawBuffer->Width;
+ if (x + n > (GLint) ctx->DrawBuffer->Width) {
+ GLint dx = x + n - (GLint) ctx->DrawBuffer->Width;
GLint i;
for (i = 0; i < dx; i++)
depth[n - i - 1] = 0.0F;
}
else {
/* no depth buffer */
- BZERO(depth, n * sizeof(GLfloat));
+ _mesa_bzero(depth, n * sizeof(GLfloat));
}
}
-/*
+/**
* Allocate a new depth buffer. If there's already a depth buffer allocated
* it will be free()'d. The new depth buffer will be uniniitalized.
* This function is only called through Driver.alloc_depth_buffer.
*/
void
-_mesa_alloc_depth_buffer( GLcontext *ctx )
+_swrast_alloc_depth_buffer( GLframebuffer *buffer )
{
- /* deallocate current depth buffer if present */
- if (ctx->DrawBuffer->UseSoftwareDepthBuffer) {
- GLint bytesPerValue;
+ GLint bytesPerValue;
- if (ctx->DrawBuffer->DepthBuffer) {
- FREE(ctx->DrawBuffer->DepthBuffer);
- ctx->DrawBuffer->DepthBuffer = NULL;
- }
+ ASSERT(buffer->UseSoftwareDepthBuffer);
- /* allocate new depth buffer, but don't initialize it */
- if (ctx->Visual.depthBits <= 16)
- bytesPerValue = sizeof(GLushort);
- else
- bytesPerValue = sizeof(GLuint);
+ /* deallocate current depth buffer if present */
+ if (buffer->DepthBuffer) {
+ MESA_PBUFFER_FREE(buffer->DepthBuffer);
+ buffer->DepthBuffer = NULL;
+ }
+
+ /* allocate new depth buffer, but don't initialize it */
+ if (buffer->Visual.depthBits <= 16)
+ bytesPerValue = sizeof(GLushort);
+ else
+ bytesPerValue = sizeof(GLuint);
- ctx->DrawBuffer->DepthBuffer = MALLOC( ctx->DrawBuffer->Width
- * ctx->DrawBuffer->Height
- * bytesPerValue );
+ buffer->DepthBuffer = MESA_PBUFFER_ALLOC(buffer->Width * buffer->Height
+ * bytesPerValue);
- if (!ctx->DrawBuffer->DepthBuffer) {
- /* out of memory */
+ if (!buffer->DepthBuffer) {
+ /* out of memory */
+ GET_CURRENT_CONTEXT(ctx);
+ if (ctx) {
ctx->Depth.Test = GL_FALSE;
ctx->NewState |= _NEW_DEPTH;
- _mesa_error( ctx, GL_OUT_OF_MEMORY, "Couldn't allocate depth buffer" );
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "Couldn't allocate depth buffer");
}
}
}
-
-
-/*
+/**
* Clear the depth buffer. If the depth buffer doesn't exist yet we'll
* allocate it now.
* This function is only called through Driver.clear_depth_buffer.
*/
void
-_mesa_clear_depth_buffer( GLcontext *ctx )
+_swrast_clear_depth_buffer( GLcontext *ctx )
{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
if (ctx->Visual.depthBits == 0
- || !ctx->DrawBuffer->DepthBuffer
|| !ctx->Depth.Mask) {
/* no depth buffer, or writing to it is disabled */
return;
}
+ if (swrast->Driver.WriteMonoDepthSpan) {
+ const GLdepth clearValue = (GLdepth)(ctx->Depth.Clear * ctx->DepthMax);
+ const GLint x = ctx->DrawBuffer->_Xmin;
+ const GLint y = ctx->DrawBuffer->_Ymin;
+ const GLint height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
+ const GLint width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
+ GLint i;
+
+ for (i = 0; i < height; i++) {
+ (*swrast->Driver.WriteMonoDepthSpan)( ctx, width, x, y + i,
+ clearValue, NULL );
+ }
+
+ return;
+ }
+
+ if (!ctx->DrawBuffer->DepthBuffer)
+ return;
+
/* The loops in this function have been written so the IRIX 5.3
* C compiler can unroll them. Hopefully other compilers can too!
*/
const GLushort clearValue = (GLushort) (ctx->Depth.Clear * ctx->DepthMax);
if ((clearValue & 0xff) == (clearValue >> 8)) {
if (clearValue == 0) {
- BZERO(ctx->DrawBuffer->DepthBuffer,
+ _mesa_bzero(ctx->DrawBuffer->DepthBuffer,
2*ctx->DrawBuffer->Width*ctx->DrawBuffer->Height);
}
else {
/* >16 bit depth buffer */
const GLuint clearValue = (GLuint) (ctx->Depth.Clear * ctx->DepthMax);
if (clearValue == 0) {
- BZERO(ctx->DrawBuffer->DepthBuffer,
+ _mesa_bzero(ctx->DrawBuffer->DepthBuffer,
ctx->DrawBuffer->Width*ctx->DrawBuffer->Height*sizeof(GLuint));
}
else {
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