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- /* $Id: texobj.c,v 1.19 1997/11/07 03:38:07 brianp Exp $ */
-
- /*
- * Mesa 3-D graphics library
- * Version: 2.5
- * Copyright (C) 1995-1997 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
- /*
- * $Log: texobj.c,v $
- * Revision 1.19 1997/11/07 03:38:07 brianp
- * added stdio.h include for SunOS 4.x
- *
- * Revision 1.18 1997/10/13 23:57:59 brianp
- * added target parameter to Driver.BindTexture()
- *
- * Revision 1.17 1997/09/29 23:28:14 brianp
- * updated for new device driver texture functions
- *
- * Revision 1.16 1997/09/27 00:14:39 brianp
- * added GL_EXT_paletted_texture extension
- *
- * Revision 1.15 1997/09/23 00:58:15 brianp
- * now using hash table for texture objects
- *
- * Revision 1.14 1997/08/23 18:41:40 brianp
- * fixed bug in glBindTexture() when binding an incomplete texture image
- *
- * Revision 1.13 1997/08/23 17:14:44 brianp
- * fixed bug: glBindTexture(target, 0) caused segfault
- *
- * Revision 1.12 1997/07/24 01:25:34 brianp
- * changed precompiled header symbol from PCH to PC_HEADER
- *
- * Revision 1.11 1997/05/28 03:26:49 brianp
- * added precompiled header (PCH) support
- *
- * Revision 1.10 1997/05/17 03:41:49 brianp
- * added code to update ctx->Texture.Current in gl_BindTexture()
- *
- * Revision 1.9 1997/05/03 00:52:52 brianp
- * removed a few unused variables
- *
- * Revision 1.8 1997/05/01 02:08:12 brianp
- * new implementation of gl_BindTexture()
- *
- * Revision 1.7 1997/04/28 23:38:45 brianp
- * added gl_test_texture_object_completeness()
- *
- * Revision 1.6 1997/04/14 02:03:05 brianp
- * added MinMagThresh to texture object
- *
- * Revision 1.5 1997/02/09 18:52:15 brianp
- * added GL_EXT_texture3D support
- *
- * Revision 1.4 1997/01/16 03:35:34 brianp
- * added calls to device driver DeleteTexture() and BindTexture() functions
- *
- * Revision 1.3 1997/01/09 19:49:47 brianp
- * added a check to switch rasterizers if needed in glBindTexture()
- *
- * Revision 1.2 1996/09/27 17:09:42 brianp
- * removed a redundant return statement
- *
- * Revision 1.1 1996/09/13 01:38:16 brianp
- * Initial revision
- *
- */
-
-
- #ifdef PC_HEADER
- #include "all.h"
- #else
- #include <assert.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include "context.h"
- #include "hash.h"
- #include "macros.h"
- #include "teximage.h"
- #include "texobj.h"
- #include "types.h"
- #endif
-
-
-
- /*
- * Allocate a new texture object and add it to the linked list of texture
- * objects. If name>0 then also insert the new texture object into the hash
- * table.
- * Input: shared - the shared GL state structure to contain the texture object
- * name - integer name for the texture object
- * dimensions - either 1, 2 or 3
- * Return: pointer to new texture object
- */
- struct gl_texture_object *
- gl_alloc_texture_object( struct gl_shared_state *shared, GLuint name,
- GLuint dimensions)
- {
- struct gl_texture_object *obj;
-
- assert(dimensions >= 1 && dimensions <= 3);
-
- obj = (struct gl_texture_object *)
- calloc(1,sizeof(struct gl_texture_object));
- if (obj) {
- /* init the non-zero fields */
- obj->Name = name;
- obj->Dimensions = dimensions;
- obj->WrapS = GL_REPEAT;
- obj->WrapT = GL_REPEAT;
- obj->MinFilter = GL_NEAREST_MIPMAP_LINEAR;
- obj->MagFilter = GL_LINEAR;
- obj->MinMagThresh = 0.0F;
- obj->Palette[0] = 255;
- obj->Palette[1] = 255;
- obj->Palette[2] = 255;
- obj->Palette[3] = 255;
- obj->PaletteSize = 1;
- obj->PaletteIntFormat = GL_RGBA;
- obj->PaletteFormat = GL_RGBA;
-
- /* insert into linked list */
- if (shared) {
- obj->Next = shared->TexObjectList;
- shared->TexObjectList = obj;
- }
-
- if (name > 0) {
- /* insert into hash table */
- HashInsert(shared->TexObjects, name, obj);
- }
- }
- return obj;
- }
-
-
- /*
- * Deallocate a texture object struct and remove it from the given
- * shared GL state.
- * Input: shared - the shared GL state to which the object belongs
- * t - the texture object to delete
- */
- void gl_free_texture_object( struct gl_shared_state *shared,
- struct gl_texture_object *t )
- {
- struct gl_texture_object *tprev, *tcurr;
-
- assert(t);
-
- /* unlink t from the linked list */
- if (shared) {
- tprev = NULL;
- tcurr = shared->TexObjectList;
- while (tcurr) {
- if (tcurr==t) {
- if (tprev) {
- tprev->Next = t->Next;
- }
- else {
- shared->TexObjectList = t->Next;
- }
- break;
- }
- tprev = tcurr;
- tcurr = tcurr->Next;
- }
- }
-
- if (t->Name) {
- /* remove from hash table */
- HashRemove(shared->TexObjects, t->Name);
- }
-
- /* free texture image */
- {
- GLuint i;
- for (i=0;i<MAX_TEXTURE_LEVELS;i++) {
- if (t->Image[i]) {
- gl_free_texture_image( t->Image[i] );
- }
- }
- }
- /* free this object */
- free( t );
- }
-
-
-
- /*
- * Examine a texture object to determine if it is complete or not.
- * The t->Complete flag will be set to GL_TRUE or GL_FALSE accordingly.
- */
- void gl_test_texture_object_completeness( struct gl_texture_object *t )
- {
- t->Complete = GL_TRUE; /* be optimistic */
-
- /* Always need level zero image */
- if (!t->Image[0] || !t->Image[0]->Data) {
- t->Complete = GL_FALSE;
- return;
- }
-
- if (t->MinFilter!=GL_NEAREST && t->MinFilter!=GL_LINEAR) {
- /*
- * Mipmapping: determine if we have a complete set of mipmaps
- */
- int i;
-
- /* Test dimension-independent attributes */
- for (i=1; i<MAX_TEXTURE_LEVELS; i++) {
- if (t->Image[i]) {
- if (!t->Image[i]->Data) {
- t->Complete = GL_FALSE;
- return;
- }
- if (t->Image[i]->Format != t->Image[0]->Format) {
- t->Complete = GL_FALSE;
- return;
- }
- if (t->Image[i]->Border != t->Image[0]->Border) {
- t->Complete = GL_FALSE;
- return;
- }
- }
- }
-
- /* Test things which depend on number of texture image dimensions */
- if (t->Dimensions==1) {
- /* Test 1-D mipmaps */
- GLuint width = t->Image[0]->Width2;
- for (i=1; i<MAX_TEXTURE_LEVELS; i++) {
- if (width>1) {
- width /= 2;
- }
- if (!t->Image[i]) {
- t->Complete = GL_FALSE;
- return;
- }
- if (!t->Image[i]->Data) {
- t->Complete = GL_FALSE;
- return;
- }
- if (t->Image[i]->Format != t->Image[0]->Format) {
- t->Complete = GL_FALSE;
- return;
- }
- if (t->Image[i]->Border != t->Image[0]->Border) {
- t->Complete = GL_FALSE;
- return;
- }
- if (t->Image[i]->Width2 != width ) {
- t->Complete = GL_FALSE;
- return;
- }
- if (width==1) {
- return; /* found smallest needed mipmap, all done! */
- }
- }
- }
- else if (t->Dimensions==2) {
- /* Test 2-D mipmaps */
- GLuint width = t->Image[0]->Width2;
- GLuint height = t->Image[0]->Height2;
- for (i=1; i<MAX_TEXTURE_LEVELS; i++) {
- if (width>1) {
- width /= 2;
- }
- if (height>1) {
- height /= 2;
- }
- if (!t->Image[i]) {
- t->Complete = GL_FALSE;
- return;
- }
- if (t->Image[i]->Width2 != width) {
- t->Complete = GL_FALSE;
- return;
- }
- if (t->Image[i]->Height2 != height) {
- t->Complete = GL_FALSE;
- return;
- }
- if (width==1 && height==1) {
- return; /* found smallest needed mipmap, all done! */
- }
- }
- }
- else if (t->Dimensions==3) {
- /* Test 3-D mipmaps */
- GLuint width = t->Image[0]->Width2;
- GLuint height = t->Image[0]->Height2;
- GLuint depth = t->Image[0]->Depth2;
- for (i=1; i<MAX_TEXTURE_LEVELS; i++) {
- if (width>1) {
- width /= 2;
- }
- if (height>1) {
- height /= 2;
- }
- if (depth>1) {
- depth /= 2;
- }
- if (!t->Image[i]) {
- t->Complete = GL_FALSE;
- return;
- }
- if (t->Image[i]->Width2 != width) {
- t->Complete = GL_FALSE;
- return;
- }
- if (t->Image[i]->Height2 != height) {
- t->Complete = GL_FALSE;
- return;
- }
- if (t->Image[i]->Depth2 != depth) {
- t->Complete = GL_FALSE;
- return;
- }
- if (width==1 && height==1 && depth==1) {
- return; /* found smallest needed mipmap, all done! */
- }
- }
- }
- else {
- /* Dimensions = ??? */
- gl_problem(NULL, "Bug in gl_test_texture_object_completeness\n");
- }
- }
- }
-
-
-
- /*
- * Execute glGenTextures
- */
- void gl_GenTextures( GLcontext *ctx, GLsizei n, GLuint *texName )
- {
- GLuint first, i;
-
- if (INSIDE_BEGIN_END(ctx)) {
- gl_error( ctx, GL_INVALID_OPERATION, "glGenTextures" );
- return;
- }
- if (n<0) {
- gl_error( ctx, GL_INVALID_VALUE, "glGenTextures" );
- return;
- }
-
- first = HashFindFreeKeyBlock(ctx->Shared->TexObjects, n);
- for (i=0;i<n;i++) {
- texName[i] = first + i;
- }
- }
-
-
-
- /*
- * Execute glDeleteTextures
- */
- void gl_DeleteTextures( GLcontext *ctx, GLsizei n, const GLuint *texName)
- {
- GLuint i;
-
- if (INSIDE_BEGIN_END(ctx)) {
- gl_error( ctx, GL_INVALID_OPERATION, "glAreTexturesResident" );
- return;
- }
-
- for (i=0;i<n;i++) {
- struct gl_texture_object *t;
- if (texName[i]>0) {
- t = (struct gl_texture_object *)
- HashLookup(ctx->Shared->TexObjects, texName[i]);
- if (t) {
- if (ctx->Texture.Current1D==t) {
- /* revert to default 1-D texture */
- ctx->Texture.Current1D = ctx->Shared->Default1D;
- t->RefCount--;
- assert( t->RefCount >= 0 );
- }
- else if (ctx->Texture.Current2D==t) {
- /* revert to default 2-D texture */
- ctx->Texture.Current2D = ctx->Shared->Default2D;
- t->RefCount--;
- assert( t->RefCount >= 0 );
- }
- else if (ctx->Texture.Current3D==t) {
- /* revert to default 3-D texture */
- ctx->Texture.Current3D = ctx->Shared->Default3D;
- t->RefCount--;
- assert( t->RefCount >= 0 );
- }
-
- /* tell device driver to delete texture */
- if (ctx->Driver.DeleteTexture) {
- (*ctx->Driver.DeleteTexture)( ctx, t );
- }
-
- if (t->RefCount==0) {
- gl_free_texture_object(ctx->Shared, t);
- }
- }
- }
- }
- }
-
-
-
- /*
- * Execute glBindTexture
- */
- void gl_BindTexture( GLcontext *ctx, GLenum target, GLuint texName )
- {
- struct gl_texture_object *oldTexObj;
- struct gl_texture_object *newTexObj;
- struct gl_texture_object **targetPointer;
- GLuint targetDimensions;
-
- if (INSIDE_BEGIN_END(ctx)) {
- gl_error( ctx, GL_INVALID_OPERATION, "glAreTexturesResident" );
- return;
- }
- switch (target) {
- case GL_TEXTURE_1D:
- oldTexObj = ctx->Texture.Current1D;
- targetPointer = &ctx->Texture.Current1D;
- targetDimensions = 1;
- break;
- case GL_TEXTURE_2D:
- oldTexObj = ctx->Texture.Current2D;
- targetPointer = &ctx->Texture.Current2D;
- targetDimensions = 2;
- break;
- case GL_TEXTURE_3D_EXT:
- oldTexObj = ctx->Texture.Current3D;
- targetPointer = &ctx->Texture.Current3D;
- targetDimensions = 3;
- break;
- default:
- gl_error( ctx, GL_INVALID_ENUM, "glBindTexture" );
- return;
- }
-
- if (texName==0) {
- /* use default n-D texture */
- switch (target) {
- case GL_TEXTURE_1D:
- newTexObj = ctx->Shared->Default1D;
- break;
- case GL_TEXTURE_2D:
- newTexObj = ctx->Shared->Default2D;
- break;
- case GL_TEXTURE_3D_EXT:
- newTexObj = ctx->Shared->Default3D;
- break;
- default:
- gl_problem(ctx, "Bad target in gl_BindTexture");
- return;
- }
- }
- else {
- newTexObj = (struct gl_texture_object *)
- HashLookup(ctx->Shared->TexObjects, texName);
- if (newTexObj) {
- if (newTexObj->Dimensions!=targetDimensions) {
- /* wrong dimensionality */
- gl_error( ctx, GL_INVALID_OPERATION, "glBindTextureEXT" );
- return;
- }
- }
- else {
- /* create new texture object */
- newTexObj = gl_alloc_texture_object(ctx->Shared, texName,
- targetDimensions);
- }
- }
-
- /* Update the Texture.Current[123]D pointer */
- *targetPointer = newTexObj;
-
- /* Tidy up reference counting */
- if (*targetPointer != oldTexObj && oldTexObj->Name>0) {
- /* decrement reference count of the prev texture object */
- oldTexObj->RefCount--;
- assert( oldTexObj->RefCount >= 0 );
- }
-
- if (newTexObj->Name>0) {
- newTexObj->RefCount++;
- }
-
- /* Check if we may have to use a new triangle rasterizer */
- if ( oldTexObj->WrapS != newTexObj->WrapS
- || oldTexObj->WrapT != newTexObj->WrapT
- || oldTexObj->WrapR != newTexObj->WrapR
- || oldTexObj->MinFilter != newTexObj->MinFilter
- || oldTexObj->MagFilter != newTexObj->MagFilter
- || !newTexObj->Complete) {
- ctx->NewState |= NEW_RASTER_OPS;
- }
-
- /* If we've changed the Current[123]D texture object then update the
- * ctx->Texture.Current pointer to point to the new texture object.
- */
- if (oldTexObj==ctx->Texture.Current) {
- ctx->Texture.Current = newTexObj;
- }
-
- /* The current n-D texture object can never be NULL! */
- assert(*targetPointer);
-
- /* Pass BindTexture call to device driver */
- if (ctx->Driver.BindTexture) {
- (*ctx->Driver.BindTexture)( ctx, target, newTexObj );
- }
- }
-
-
-
- /*
- * Execute glPrioritizeTextures
- */
- void gl_PrioritizeTextures( GLcontext *ctx,
- GLsizei n, const GLuint *texName,
- const GLclampf *priorities )
- {
- GLuint i;
-
- if (INSIDE_BEGIN_END(ctx)) {
- gl_error( ctx, GL_INVALID_OPERATION, "glAreTexturesResident" );
- return;
- }
- if (n<0) {
- gl_error( ctx, GL_INVALID_VALUE, "glAreTexturesResident(n)" );
- return;
- }
-
- for (i=0;i<n;i++) {
- struct gl_texture_object *t;
- if (texName[i]>0) {
- t = (struct gl_texture_object *)
- HashLookup(ctx->Shared->TexObjects, texName[i]);
- if (t) {
- t->Priority = CLAMP( priorities[i], 0.0F, 1.0F );
- }
- }
- }
- }
-
-
-
- /*
- * Execute glAreTexturesResident
- */
- GLboolean gl_AreTexturesResident( GLcontext *ctx, GLsizei n,
- const GLuint *texName,
- GLboolean *residences )
- {
- GLboolean resident = GL_TRUE;
- GLuint i;
-
- if (INSIDE_BEGIN_END(ctx)) {
- gl_error( ctx, GL_INVALID_OPERATION, "glAreTexturesResident" );
- return GL_FALSE;
- }
- if (n<0) {
- gl_error( ctx, GL_INVALID_VALUE, "glAreTexturesResident(n)" );
- return GL_FALSE;
- }
-
- for (i=0;i<n;i++) {
- struct gl_texture_object *t;
- if (texName[i]==0) {
- gl_error( ctx, GL_INVALID_VALUE, "glAreTexturesResident(textures)" );
- return GL_FALSE;
- }
- t = (struct gl_texture_object *)
- HashLookup(ctx->Shared->TexObjects, texName[i]);
- if (t) {
- /* we consider all valid texture objects to be resident */
- residences[i] = GL_TRUE;
- }
- else {
- gl_error( ctx, GL_INVALID_VALUE, "glAreTexturesResident(textures)" );
- return GL_FALSE;
- }
- }
- return resident;
- }
-
-
-
- /*
- * Execute glIsTexture
- */
- GLboolean gl_IsTexture( GLcontext *ctx, GLuint texture )
- {
- if (INSIDE_BEGIN_END(ctx)) {
- gl_error( ctx, GL_INVALID_OPERATION, "glIsTextures" );
- return GL_FALSE;
- }
- if (texture>0 && HashLookup(ctx->Shared->TexObjects, texture)) {
- return GL_TRUE;
- }
- else {
- return GL_FALSE;
- }
- }
-
-