-/* $Id: depth.c,v 1.17 2000/04/11 20:42:22 brianp Exp $ */
-
/*
* Mesa 3-D graphics library
- * Version: 3.3
- *
- * Copyright (C) 1999-2000 Brian Paul All Rights Reserved.
- *
+ * Version: 7.1
+ *
+ * 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"),
* 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
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
-#ifdef PC_HEADER
-#include "all.h"
-#else
#include "glheader.h"
+#include "imports.h"
#include "context.h"
-#include "enums.h"
#include "depth.h"
-#include "mem.h"
-#include "pb.h"
-#include "types.h"
-#endif
-
+#include "enums.h"
+#include "macros.h"
+#include "mtypes.h"
/**********************************************************************/
-void
+void GLAPIENTRY
_mesa_ClearDepth( GLclampd depth )
{
GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glClearDepth");
- ctx->Depth.Clear = (GLfloat) CLAMP( depth, 0.0, 1.0 );
- if (ctx->Driver.ClearDepth)
- (*ctx->Driver.ClearDepth)( ctx, ctx->Depth.Clear );
+
+ if (MESA_VERBOSE & VERBOSE_API)
+ _mesa_debug(ctx, "glClearDepth(%f)\n", depth);
+
+ ctx->Depth.Clear = CLAMP( depth, 0.0, 1.0 );
}
+void GLAPIENTRY
+_mesa_ClearDepthf( GLclampf depth )
+{
+ _mesa_ClearDepth(depth);
+}
-void
+
+void GLAPIENTRY
_mesa_DepthFunc( GLenum func )
{
GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glDepthFunc");
- if (MESA_VERBOSE & (VERBOSE_API|VERBOSE_TEXTURE))
- fprintf(stderr, "glDepthFunc %s\n", gl_lookup_enum_by_nr(func));
+ if (MESA_VERBOSE & VERBOSE_API)
+ _mesa_debug(ctx, "glDepthFunc %s\n", _mesa_lookup_enum_by_nr(func));
switch (func) {
- case GL_LESS: /* (default) pass if incoming z < stored z */
- case GL_GEQUAL:
- case GL_LEQUAL:
- case GL_GREATER:
- case GL_NOTEQUAL:
- case GL_EQUAL:
- case GL_ALWAYS:
- if (ctx->Depth.Func != func) {
- ctx->Depth.Func = func;
- ctx->NewState |= NEW_RASTER_OPS;
- ctx->TriangleCaps &= ~DD_Z_NEVER;
- if (ctx->Driver.DepthFunc) {
- (*ctx->Driver.DepthFunc)( ctx, func );
- }
- }
- break;
- case GL_NEVER:
- if (ctx->Depth.Func != func) {
- ctx->Depth.Func = func;
- ctx->NewState |= NEW_RASTER_OPS;
- ctx->TriangleCaps |= DD_Z_NEVER;
- if (ctx->Driver.DepthFunc) {
- (*ctx->Driver.DepthFunc)( ctx, func );
- }
- }
- break;
- default:
- gl_error( ctx, GL_INVALID_ENUM, "glDepth.Func" );
+ case GL_LESS: /* (default) pass if incoming z < stored z */
+ case GL_GEQUAL:
+ case GL_LEQUAL:
+ case GL_GREATER:
+ case GL_NOTEQUAL:
+ case GL_EQUAL:
+ case GL_ALWAYS:
+ case GL_NEVER:
+ break;
+ default:
+ _mesa_error( ctx, GL_INVALID_ENUM, "glDepth.Func" );
+ return;
}
+
+ if (ctx->Depth.Func == func)
+ return;
+
+ FLUSH_VERTICES(ctx, _NEW_DEPTH);
+ ctx->Depth.Func = func;
+
+ if (ctx->Driver.DepthFunc)
+ ctx->Driver.DepthFunc( ctx, func );
}
-void
+void GLAPIENTRY
_mesa_DepthMask( GLboolean flag )
{
GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glDepthMask");
- if (MESA_VERBOSE & (VERBOSE_API|VERBOSE_TEXTURE))
- fprintf(stderr, "glDepthMask %d\n", flag);
+ if (MESA_VERBOSE & VERBOSE_API)
+ _mesa_debug(ctx, "glDepthMask %d\n", flag);
/*
* GL_TRUE indicates depth buffer writing is enabled (default)
* GL_FALSE indicates depth buffer writing is disabled
*/
- if (ctx->Depth.Mask != flag) {
- ctx->Depth.Mask = flag;
- ctx->NewState |= NEW_RASTER_OPS;
- if (ctx->Driver.DepthMask) {
- (*ctx->Driver.DepthMask)( ctx, flag );
- }
- }
-}
-
-
-
-/**********************************************************************/
-/***** Misc *****/
-/**********************************************************************/
-
-/*
- * Return address of depth buffer value for given window coord.
- */
-GLvoid *
-_mesa_zbuffer_address(GLcontext *ctx, GLint x, GLint y)
-{
- if (ctx->Visual->DepthBits <= 16)
- return (GLushort *) ctx->DrawBuffer->DepthBuffer + ctx->DrawBuffer->Width * y + x;
- else
- return (GLuint *) ctx->DrawBuffer->DepthBuffer + ctx->DrawBuffer->Width * y + x;
-}
-
-
-#define Z_ADDRESS16( CTX, X, Y ) \
- ( ((GLushort *) (CTX)->DrawBuffer->DepthBuffer) \
- + (CTX)->DrawBuffer->Width * (Y) + (X) )
-
-#define Z_ADDRESS32( CTX, X, Y ) \
- ( ((GLuint *) (CTX)->DrawBuffer->DepthBuffer) \
- + (CTX)->DrawBuffer->Width * (Y) + (X) )
-
-
-
-/**********************************************************************/
-/***** Depth Testing Functions *****/
-/**********************************************************************/
-
-
-/*
- * Do depth test for an array of fragments. This is used both for
- * software and hardware Z buffers.
- * Input: zbuffer - array of z values in the zbuffer
- * z - array of fragment z values
- * Return: number of fragments which pass the test.
- */
-static GLuint
-depth_test_span16( GLcontext *ctx, GLuint n, GLint x, GLint y,
- GLushort zbuffer[], const GLdepth z[], GLubyte mask[] )
-{
- GLuint passed = 0;
-
- /* switch cases ordered from most frequent to less frequent */
- switch (ctx->Depth.Func) {
- case GL_LESS:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- if (z[i] < zbuffer[i]) {
- /* pass */
- zbuffer[i] = z[i];
- passed++;
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- if (z[i] < zbuffer[i]) {
- /* pass */
- passed++;
- }
- else {
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_LEQUAL:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0;i<n;i++) {
- if (mask[i]) {
- if (z[i] <= zbuffer[i]) {
- zbuffer[i] = z[i];
- passed++;
- }
- else {
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0;i<n;i++) {
- if (mask[i]) {
- if (z[i] <= zbuffer[i]) {
- /* pass */
- passed++;
- }
- else {
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_GEQUAL:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0;i<n;i++) {
- if (mask[i]) {
- if (z[i] >= zbuffer[i]) {
- zbuffer[i] = z[i];
- passed++;
- }
- else {
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0;i<n;i++) {
- if (mask[i]) {
- if (z[i] >= zbuffer[i]) {
- /* pass */
- passed++;
- }
- else {
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_GREATER:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0;i<n;i++) {
- if (mask[i]) {
- if (z[i] > zbuffer[i]) {
- zbuffer[i] = z[i];
- passed++;
- }
- else {
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0;i<n;i++) {
- if (mask[i]) {
- if (z[i] > zbuffer[i]) {
- /* pass */
- passed++;
- }
- else {
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_NOTEQUAL:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0;i<n;i++) {
- if (mask[i]) {
- if (z[i] != zbuffer[i]) {
- zbuffer[i] = z[i];
- passed++;
- }
- else {
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0;i<n;i++) {
- if (mask[i]) {
- if (z[i] != zbuffer[i]) {
- /* pass */
- passed++;
- }
- else {
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_EQUAL:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0;i<n;i++) {
- if (mask[i]) {
- if (z[i] == zbuffer[i]) {
- zbuffer[i] = z[i];
- passed++;
- }
- else {
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0;i<n;i++) {
- if (mask[i]) {
- if (z[i] == zbuffer[i]) {
- /* pass */
- passed++;
- }
- else {
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_ALWAYS:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0;i<n;i++) {
- if (mask[i]) {
- zbuffer[i] = z[i];
- passed++;
- }
- }
- }
- else {
- /* Don't update Z buffer or mask */
- passed = n;
- }
- break;
- case GL_NEVER:
- BZERO(mask, n * sizeof(GLubyte));
- break;
- default:
- gl_problem(ctx, "Bad depth func in depth_test_span16");
- }
-
- return passed;
-}
-
-
-static GLuint
-depth_test_span32( GLcontext *ctx, GLuint n, GLint x, GLint y,
- GLuint zbuffer[], const GLdepth z[], GLubyte mask[] )
-{
- GLuint passed = 0;
-
- /* switch cases ordered from most frequent to less frequent */
- switch (ctx->Depth.Func) {
- case GL_LESS:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- if (z[i] < zbuffer[i]) {
- /* pass */
- zbuffer[i] = z[i];
- passed++;
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- if (z[i] < zbuffer[i]) {
- /* pass */
- passed++;
- }
- else {
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_LEQUAL:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0;i<n;i++) {
- if (mask[i]) {
- if (z[i] <= zbuffer[i]) {
- zbuffer[i] = z[i];
- passed++;
- }
- else {
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0;i<n;i++) {
- if (mask[i]) {
- if (z[i] <= zbuffer[i]) {
- /* pass */
- passed++;
- }
- else {
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_GEQUAL:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0;i<n;i++) {
- if (mask[i]) {
- if (z[i] >= zbuffer[i]) {
- zbuffer[i] = z[i];
- passed++;
- }
- else {
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0;i<n;i++) {
- if (mask[i]) {
- if (z[i] >= zbuffer[i]) {
- /* pass */
- passed++;
- }
- else {
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_GREATER:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0;i<n;i++) {
- if (mask[i]) {
- if (z[i] > zbuffer[i]) {
- zbuffer[i] = z[i];
- passed++;
- }
- else {
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0;i<n;i++) {
- if (mask[i]) {
- if (z[i] > zbuffer[i]) {
- /* pass */
- passed++;
- }
- else {
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_NOTEQUAL:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0;i<n;i++) {
- if (mask[i]) {
- if (z[i] != zbuffer[i]) {
- zbuffer[i] = z[i];
- passed++;
- }
- else {
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0;i<n;i++) {
- if (mask[i]) {
- if (z[i] != zbuffer[i]) {
- /* pass */
- passed++;
- }
- else {
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_EQUAL:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0;i<n;i++) {
- if (mask[i]) {
- if (z[i] == zbuffer[i]) {
- zbuffer[i] = z[i];
- passed++;
- }
- else {
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0;i<n;i++) {
- if (mask[i]) {
- if (z[i] == zbuffer[i]) {
- /* pass */
- passed++;
- }
- else {
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_ALWAYS:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0;i<n;i++) {
- if (mask[i]) {
- zbuffer[i] = z[i];
- passed++;
- }
- }
- }
- else {
- /* Don't update Z buffer or mask */
- passed = n;
- }
- break;
- case GL_NEVER:
- BZERO(mask, n * sizeof(GLubyte));
- break;
- default:
- gl_problem(ctx, "Bad depth func in depth_test_span32");
- }
-
- return passed;
-}
-
-
-
-/*
- * Apply depth test to span of fragments. Hardware or software z buffer.
- */
-GLuint
-_mesa_depth_test_span( GLcontext *ctx, GLuint n, GLint x, GLint y,
- const GLdepth z[], GLubyte mask[] )
-{
- if (ctx->Driver.ReadDepthSpan) {
- /* hardware-based depth buffer */
- GLdepth zbuffer[MAX_WIDTH];
- GLuint passed;
- (*ctx->Driver.ReadDepthSpan)(ctx, n, x, y, zbuffer);
- passed = depth_test_span32(ctx, n, x, y, zbuffer, z, mask);
- assert(ctx->Driver.WriteDepthSpan);
- (*ctx->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;
- }
- }
-}
-
-
+ if (ctx->Depth.Mask == flag)
+ return;
+ FLUSH_VERTICES(ctx, _NEW_DEPTH);
+ ctx->Depth.Mask = flag;
-/*
- * Do depth testing for an array of fragments using software Z buffer.
- */
-static void
-software_depth_test_pixels16( GLcontext *ctx, GLuint n,
- const GLint x[], const GLint y[],
- const GLdepth z[], GLubyte mask[] )
-{
- /* switch cases ordered from most frequent to less frequent */
- switch (ctx->Depth.Func) {
- case GL_LESS:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- GLushort *zptr = Z_ADDRESS16(ctx,x[i],y[i]);
- if (z[i] < *zptr) {
- /* pass */
- *zptr = z[i];
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- GLushort *zptr = Z_ADDRESS16(ctx,x[i],y[i]);
- if (z[i] < *zptr) {
- /* pass */
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_LEQUAL:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- GLushort *zptr = Z_ADDRESS16(ctx,x[i],y[i]);
- if (z[i] <= *zptr) {
- /* pass */
- *zptr = z[i];
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- GLushort *zptr = Z_ADDRESS16(ctx,x[i],y[i]);
- if (z[i] <= *zptr) {
- /* pass */
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_GEQUAL:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- GLushort *zptr = Z_ADDRESS16(ctx,x[i],y[i]);
- if (z[i] >= *zptr) {
- /* pass */
- *zptr = z[i];
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- GLushort *zptr = Z_ADDRESS16(ctx,x[i],y[i]);
- if (z[i] >= *zptr) {
- /* pass */
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_GREATER:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- GLushort *zptr = Z_ADDRESS16(ctx,x[i],y[i]);
- if (z[i] > *zptr) {
- /* pass */
- *zptr = z[i];
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- GLushort *zptr = Z_ADDRESS16(ctx,x[i],y[i]);
- if (z[i] > *zptr) {
- /* pass */
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_NOTEQUAL:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- GLushort *zptr = Z_ADDRESS16(ctx,x[i],y[i]);
- if (z[i] != *zptr) {
- /* pass */
- *zptr = z[i];
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- GLushort *zptr = Z_ADDRESS16(ctx,x[i],y[i]);
- if (z[i] != *zptr) {
- /* pass */
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_EQUAL:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- GLushort *zptr = Z_ADDRESS16(ctx,x[i],y[i]);
- if (z[i] == *zptr) {
- /* pass */
- *zptr = z[i];
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- GLushort *zptr = Z_ADDRESS16(ctx,x[i],y[i]);
- if (z[i] == *zptr) {
- /* pass */
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_ALWAYS:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- GLushort *zptr = Z_ADDRESS16(ctx,x[i],y[i]);
- *zptr = z[i];
- }
- }
- }
- else {
- /* Don't update Z buffer or mask */
- }
- break;
- case GL_NEVER:
- /* depth test never passes */
- BZERO(mask, n * sizeof(GLubyte));
- break;
- default:
- gl_problem(ctx, "Bad depth func in software_depth_test_pixels");
- }
+ if (ctx->Driver.DepthMask)
+ ctx->Driver.DepthMask( ctx, flag );
}
-/*
- * Do depth testing for an array of fragments using software Z buffer.
+/**
+ * Specified by the GL_EXT_depth_bounds_test extension.
*/
-static void
-software_depth_test_pixels32( GLcontext *ctx, GLuint n,
- const GLint x[], const GLint y[],
- const GLdepth z[], GLubyte mask[] )
+void GLAPIENTRY
+_mesa_DepthBoundsEXT( GLclampd zmin, GLclampd zmax )
{
- /* switch cases ordered from most frequent to less frequent */
- switch (ctx->Depth.Func) {
- case GL_LESS:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- GLuint *zptr = Z_ADDRESS32(ctx,x[i],y[i]);
- if (z[i] < *zptr) {
- /* pass */
- *zptr = z[i];
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- GLuint *zptr = Z_ADDRESS32(ctx,x[i],y[i]);
- if (z[i] < *zptr) {
- /* pass */
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_LEQUAL:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- GLuint *zptr = Z_ADDRESS32(ctx,x[i],y[i]);
- if (z[i] <= *zptr) {
- /* pass */
- *zptr = z[i];
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- GLuint *zptr = Z_ADDRESS32(ctx,x[i],y[i]);
- if (z[i] <= *zptr) {
- /* pass */
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_GEQUAL:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- GLuint *zptr = Z_ADDRESS32(ctx,x[i],y[i]);
- if (z[i] >= *zptr) {
- /* pass */
- *zptr = z[i];
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- GLuint *zptr = Z_ADDRESS32(ctx,x[i],y[i]);
- if (z[i] >= *zptr) {
- /* pass */
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_GREATER:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- GLuint *zptr = Z_ADDRESS32(ctx,x[i],y[i]);
- if (z[i] > *zptr) {
- /* pass */
- *zptr = z[i];
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- GLuint *zptr = Z_ADDRESS32(ctx,x[i],y[i]);
- if (z[i] > *zptr) {
- /* pass */
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_NOTEQUAL:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- GLuint *zptr = Z_ADDRESS32(ctx,x[i],y[i]);
- if (z[i] != *zptr) {
- /* pass */
- *zptr = z[i];
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- GLuint *zptr = Z_ADDRESS32(ctx,x[i],y[i]);
- if (z[i] != *zptr) {
- /* pass */
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_EQUAL:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- GLuint *zptr = Z_ADDRESS32(ctx,x[i],y[i]);
- if (z[i] == *zptr) {
- /* pass */
- *zptr = z[i];
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- GLuint *zptr = Z_ADDRESS32(ctx,x[i],y[i]);
- if (z[i] == *zptr) {
- /* pass */
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_ALWAYS:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- GLuint *zptr = Z_ADDRESS32(ctx,x[i],y[i]);
- *zptr = z[i];
- }
- }
- }
- else {
- /* Don't update Z buffer or mask */
- }
- break;
- case GL_NEVER:
- /* depth test never passes */
- BZERO(mask, n * sizeof(GLubyte));
- break;
- default:
- gl_problem(ctx, "Bad depth func in software_depth_test_pixels");
- }
-}
-
-
-
-/*
- * Do depth testing for an array of pixels using hardware Z buffer.
- * Input/output: zbuffer - array of depth values from Z buffer
- * Input: z - array of fragment z values.
- */
-static void
-hardware_depth_test_pixels( GLcontext *ctx, GLuint n, GLdepth zbuffer[],
- const GLdepth z[], GLubyte mask[] )
-{
- /* switch cases ordered from most frequent to less frequent */
- switch (ctx->Depth.Func) {
- case GL_LESS:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- if (z[i] < zbuffer[i]) {
- /* pass */
- zbuffer[i] = z[i];
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- if (z[i] < zbuffer[i]) {
- /* pass */
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_LEQUAL:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- if (z[i] <= zbuffer[i]) {
- /* pass */
- zbuffer[i] = z[i];
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- if (z[i] <= zbuffer[i]) {
- /* pass */
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_GEQUAL:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- if (z[i] >= zbuffer[i]) {
- /* pass */
- zbuffer[i] = z[i];
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- if (z[i] >= zbuffer[i]) {
- /* pass */
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_GREATER:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- if (z[i] > zbuffer[i]) {
- /* pass */
- zbuffer[i] = z[i];
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- if (z[i] > zbuffer[i]) {
- /* pass */
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_NOTEQUAL:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- if (z[i] != zbuffer[i]) {
- /* pass */
- zbuffer[i] = z[i];
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- if (z[i] != zbuffer[i]) {
- /* pass */
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_EQUAL:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- if (z[i] == zbuffer[i]) {
- /* pass */
- zbuffer[i] = z[i];
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- else {
- /* Don't update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- if (z[i] == zbuffer[i]) {
- /* pass */
- }
- else {
- /* fail */
- mask[i] = 0;
- }
- }
- }
- }
- break;
- case GL_ALWAYS:
- if (ctx->Depth.Mask) {
- /* Update Z buffer */
- GLuint i;
- for (i=0; i<n; i++) {
- if (mask[i]) {
- zbuffer[i] = z[i];
- }
- }
- }
- else {
- /* Don't update Z buffer or mask */
- }
- break;
- case GL_NEVER:
- /* depth test never passes */
- BZERO(mask, n * sizeof(GLubyte));
- break;
- default:
- gl_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[] )
-{
- if (ctx->Driver.ReadDepthPixels) {
- /* read depth values from hardware Z buffer */
- GLdepth zbuffer[PB_SIZE];
- (*ctx->Driver.ReadDepthPixels)(ctx, n, x, y, zbuffer);
-
- hardware_depth_test_pixels( ctx, n, zbuffer, z, mask );
-
- /* update hardware Z buffer with new values */
- assert(ctx->Driver.WriteDepthPixels);
- (*ctx->Driver.WriteDepthPixels)(ctx, n, x, y, zbuffer, mask );
- }
- else {
- /* software depth testing */
- if (ctx->Visual->DepthBits <= 16)
- software_depth_test_pixels16(ctx, n, x, y, z, mask);
- else
- software_depth_test_pixels32(ctx, n, x, y, z, mask);
- }
-}
-
-
-
-
-
-/**********************************************************************/
-/***** Read Depth Buffer *****/
-/**********************************************************************/
+ GET_CURRENT_CONTEXT(ctx);
+ if (MESA_VERBOSE & VERBOSE_API)
+ _mesa_debug(ctx, "glDepthBounds(%f, %f)\n", zmin, zmax);
-/*
- * 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,
- GLint n, GLint x, GLint y, GLdepth depth[] )
-{
- if (y < 0 || y >= ctx->DrawBuffer->Height ||
- x + (GLint) n <= 0 || x >= ctx->DrawBuffer->Width) {
- /* span is completely outside framebuffer */
- GLint i;
- for (i = 0; i < n; i++)
- depth[i] = 0;
+ if (zmin > zmax) {
+ _mesa_error(ctx, GL_INVALID_VALUE, "glDepthBoundsEXT(zmin > zmax)");
return;
}
- if (x < 0) {
- GLint dx = -x;
- GLint i;
- for (i = 0; i < dx; i++)
- depth[i] = 0;
- x = 0;
- n -= dx;
- depth += dx;
- }
- if (x + n > ctx->DrawBuffer->Width) {
- GLint dx = x + n - ctx->DrawBuffer->Width;
- GLint i;
- for (i = 0; i < dx; i++)
- depth[n - i - 1] = 0;
- n -= dx;
- }
- if (n <= 0) {
- return;
- }
-
- if (ctx->DrawBuffer->DepthBuffer) {
- /* read from software depth buffer */
- if (ctx->Visual->DepthBits <= 16) {
- const GLushort *zptr = Z_ADDRESS16( ctx, x, y );
- GLuint i;
- for (i = 0; i < n; i++) {
- depth[i] = zptr[i];
- }
- }
- else {
- const GLuint *zptr = Z_ADDRESS32( ctx, x, y );
- GLuint i;
- for (i = 0; i < n; i++) {
- depth[i] = zptr[i];
- }
- }
- }
- else if (ctx->Driver.ReadDepthSpan) {
- /* read from hardware depth buffer */
- (*ctx->Driver.ReadDepthSpan)( ctx, n, x, y, depth );
- }
- else {
- /* no depth buffer */
- BZERO(depth, n * sizeof(GLfloat));
- }
-
-}
-
-
-
+ zmin = CLAMP(zmin, 0.0, 1.0);
+ zmax = CLAMP(zmax, 0.0, 1.0);
-/*
- * 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
- * x,y - location of first pixel
- * Output: depth - the array of depth values
- */
-void
-_mesa_read_depth_span_float( GLcontext *ctx,
- GLint n, GLint x, GLint y, GLfloat depth[] )
-{
- const GLfloat scale = 1.0F / ctx->Visual->DepthMaxF;
-
- if (y < 0 || y >= ctx->DrawBuffer->Height ||
- x + (GLint) n <= 0 || x >= ctx->DrawBuffer->Width) {
- /* span is completely outside framebuffer */
- GLint i;
- for (i = 0; i < n; i++)
- depth[i] = 0.0F;
+ if (ctx->Depth.BoundsMin == zmin && ctx->Depth.BoundsMax == zmax)
return;
- }
- if (x < 0) {
- GLint dx = -x;
- GLint i;
- for (i = 0; i < dx; i++)
- depth[i] = 0.0F;
- n -= dx;
- x = 0;
- }
- if (x + n > ctx->DrawBuffer->Width) {
- GLint dx = x + n - ctx->DrawBuffer->Width;
- GLint i;
- for (i = 0; i < dx; i++)
- depth[n - i - 1] = 0.0F;
- n -= dx;
- }
- if (n <= 0) {
- return;
- }
-
- if (ctx->DrawBuffer->DepthBuffer) {
- /* read from software depth buffer */
- if (ctx->Visual->DepthBits <= 16) {
- const GLushort *zptr = Z_ADDRESS16( ctx, x, y );
- GLuint i;
- for (i = 0; i < n; i++) {
- depth[i] = (GLfloat) zptr[i] * scale;
- }
- }
- else {
- const GLuint *zptr = Z_ADDRESS32( ctx, x, y );
- GLuint i;
- for (i = 0; i < n; i++) {
- depth[i] = (GLfloat) zptr[i] * scale;
- }
- }
- }
- else if (ctx->Driver.ReadDepthSpan) {
- /* read from hardware depth buffer */
- GLdepth d[MAX_WIDTH];
- GLuint i;
- assert(n <= MAX_WIDTH);
- (*ctx->Driver.ReadDepthSpan)( ctx, n, x, y, d );
- for (i = 0; i < n; i++) {
- depth[i] = d[i] * scale;
- }
- }
- else {
- /* no depth buffer */
- BZERO(depth, n * sizeof(GLfloat));
- }
+ FLUSH_VERTICES(ctx, _NEW_DEPTH);
+ ctx->Depth.BoundsMin = (GLfloat) zmin;
+ ctx->Depth.BoundsMax = (GLfloat) zmax;
}
-
/**********************************************************************/
-/***** Allocate and Clear Depth Buffer *****/
+/***** Initialization *****/
/**********************************************************************/
-
-/*
- * 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 )
-{
- /* deallocate current depth buffer if present */
- if (ctx->DrawBuffer->UseSoftwareDepthBuffer) {
- GLint bytesPerValue;
-
- if (ctx->DrawBuffer->DepthBuffer) {
- FREE(ctx->DrawBuffer->DepthBuffer);
- ctx->DrawBuffer->DepthBuffer = NULL;
- }
-
- /* allocate new depth buffer, but don't initialize it */
- if (ctx->Visual->DepthBits <= 16)
- bytesPerValue = sizeof(GLushort);
- else
- bytesPerValue = sizeof(GLuint);
-
- ctx->DrawBuffer->DepthBuffer = MALLOC( ctx->DrawBuffer->Width
- * ctx->DrawBuffer->Height
- * bytesPerValue );
-
- if (!ctx->DrawBuffer->DepthBuffer) {
- /* out of memory */
- ctx->Depth.Test = GL_FALSE;
- ctx->NewState |= NEW_RASTER_OPS;
- gl_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.
+/**
+ * Initialize the depth buffer attribute group in the given context.
*/
void
-_mesa_clear_depth_buffer( GLcontext *ctx )
+_mesa_init_depth(struct gl_context *ctx)
{
- if (ctx->Visual->DepthBits == 0
- || !ctx->DrawBuffer->DepthBuffer
- || !ctx->Depth.Mask) {
- /* no depth buffer, or writing to it is disabled */
- return;
- }
-
- /* The loops in this function have been written so the IRIX 5.3
- * C compiler can unroll them. Hopefully other compilers can too!
- */
-
- if (ctx->Scissor.Enabled) {
- /* only clear scissor region */
- if (ctx->Visual->DepthBits <= 16) {
- const GLushort clearValue = (GLushort) (ctx->Depth.Clear * ctx->Visual->DepthMax);
- const GLint rows = ctx->DrawBuffer->Ymax - ctx->DrawBuffer->Ymin + 1;
- const GLint width = ctx->DrawBuffer->Width;
- GLushort *dRow = (GLushort *) ctx->DrawBuffer->DepthBuffer
- + ctx->DrawBuffer->Ymin * width + ctx->DrawBuffer->Xmin;
- GLint i, j;
- for (i = 0; i < rows; i++) {
- for (j = 0; j < width; j++) {
- dRow[j] = clearValue;
- }
- dRow += width;
- }
- }
- else {
- const GLuint clearValue = (GLuint) (ctx->Depth.Clear * ctx->Visual->DepthMax);
- const GLint rows = ctx->DrawBuffer->Ymax - ctx->DrawBuffer->Ymin + 1;
- const GLint width = ctx->DrawBuffer->Width;
- GLuint *dRow = (GLuint *) ctx->DrawBuffer->DepthBuffer
- + ctx->DrawBuffer->Ymin * width + ctx->DrawBuffer->Xmin;
- GLint i, j;
- for (i = 0; i < rows; i++) {
- for (j = 0; j < width; j++) {
- dRow[j] = clearValue;
- }
- dRow += width;
- }
- }
- }
- else {
- /* clear whole buffer */
- if (ctx->Visual->DepthBits <= 16) {
- const GLushort clearValue = (GLushort) (ctx->Depth.Clear * ctx->Visual->DepthMax);
- if ((clearValue & 0xff) == (clearValue >> 8)) {
- if (clearValue == 0) {
- BZERO(ctx->DrawBuffer->DepthBuffer,
- 2*ctx->DrawBuffer->Width*ctx->DrawBuffer->Height);
- }
- else {
- /* lower and upper bytes of clear_value are same, use MEMSET */
- MEMSET( ctx->DrawBuffer->DepthBuffer, clearValue & 0xff,
- 2 * ctx->DrawBuffer->Width * ctx->DrawBuffer->Height);
- }
- }
- else {
- GLushort *d = (GLushort *) ctx->DrawBuffer->DepthBuffer;
- GLint n = ctx->DrawBuffer->Width * ctx->DrawBuffer->Height;
- while (n >= 16) {
- d[0] = clearValue; d[1] = clearValue;
- d[2] = clearValue; d[3] = clearValue;
- d[4] = clearValue; d[5] = clearValue;
- d[6] = clearValue; d[7] = clearValue;
- d[8] = clearValue; d[9] = clearValue;
- d[10] = clearValue; d[11] = clearValue;
- d[12] = clearValue; d[13] = clearValue;
- d[14] = clearValue; d[15] = clearValue;
- d += 16;
- n -= 16;
- }
- while (n > 0) {
- *d++ = clearValue;
- n--;
- }
- }
- }
- else {
- /* >16 bit depth buffer */
- const GLuint clearValue = (GLuint) (ctx->Depth.Clear * ctx->Visual->DepthMax);
- if (clearValue == 0) {
- BZERO(ctx->DrawBuffer->DepthBuffer,
- ctx->DrawBuffer->Width*ctx->DrawBuffer->Height*sizeof(GLuint));
- }
- else {
- GLint n = ctx->DrawBuffer->Width * ctx->DrawBuffer->Height;
- GLuint *d = (GLuint *) ctx->DrawBuffer->DepthBuffer;
- while (n >= 16) {
- d[0] = clearValue; d[1] = clearValue;
- d[2] = clearValue; d[3] = clearValue;
- d[4] = clearValue; d[5] = clearValue;
- d[6] = clearValue; d[7] = clearValue;
- d[8] = clearValue; d[9] = clearValue;
- d[10] = clearValue; d[11] = clearValue;
- d[12] = clearValue; d[13] = clearValue;
- d[14] = clearValue; d[15] = clearValue;
- d += 16;
- n -= 16;
- }
- while (n > 0) {
- *d++ = clearValue;
- n--;
- }
- }
- }
- }
+ ctx->Depth.Test = GL_FALSE;
+ ctx->Depth.Clear = 1.0;
+ ctx->Depth.Func = GL_LESS;
+ ctx->Depth.Mask = GL_TRUE;
}
projects / mesa.git / blobdiff