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-rw-r--r--src/mesa/main/texobj.c253
1 files changed, 128 insertions, 125 deletions
diff --git a/src/mesa/main/texobj.c b/src/mesa/main/texobj.c
index 606e62d7a08..b77a00dd15c 100644
--- a/src/mesa/main/texobj.c
+++ b/src/mesa/main/texobj.c
@@ -5,9 +5,9 @@
/*
* Mesa 3-D graphics library
- * Version: 6.5
+ * Version: 7.1
*
- * Copyright (C) 1999-2006 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"),
@@ -108,6 +108,7 @@ _mesa_initialize_texture_object( struct gl_texture_object *obj,
_mesa_bzero(obj, sizeof(*obj));
/* init the non-zero fields */
+ _glthread_INIT_MUTEX(obj->Mutex);
obj->RefCount = 1;
obj->Name = name;
obj->Target = target;
@@ -155,6 +156,11 @@ _mesa_delete_texture_object( GLcontext *ctx, struct gl_texture_object *texObj )
(void) ctx;
+ /* Set Target to an invalid value. With some assertions elsewhere
+ * we can try to detect possible use of deleted textures.
+ */
+ texObj->Target = 0x99;
+
#if FEATURE_colortable
_mesa_free_colortable_data(&texObj->Palette);
#endif
@@ -168,6 +174,9 @@ _mesa_delete_texture_object( GLcontext *ctx, struct gl_texture_object *texObj )
}
}
+ /* destroy the mutex -- it may have allocated memory (eg on bsd) */
+ _glthread_DESTROY_MUTEX(texObj->Mutex);
+
/* free this object */
_mesa_free(texObj);
}
@@ -186,6 +195,7 @@ void
_mesa_copy_texture_object( struct gl_texture_object *dest,
const struct gl_texture_object *src )
{
+ dest->Target = src->Target;
dest->Name = src->Name;
dest->Priority = src->Priority;
dest->BorderColor[0] = src->BorderColor[0];
@@ -218,6 +228,94 @@ _mesa_copy_texture_object( struct gl_texture_object *dest,
/**
+ * Check if the given texture object is valid by examining its Target field.
+ * For debugging only.
+ */
+static GLboolean
+valid_texture_object(const struct gl_texture_object *tex)
+{
+ switch (tex->Target) {
+ case 0:
+ case GL_TEXTURE_1D:
+ case GL_TEXTURE_2D:
+ case GL_TEXTURE_3D:
+ case GL_TEXTURE_CUBE_MAP_ARB:
+ case GL_TEXTURE_RECTANGLE_NV:
+ case GL_TEXTURE_1D_ARRAY_EXT:
+ case GL_TEXTURE_2D_ARRAY_EXT:
+ return GL_TRUE;
+ case 0x99:
+ _mesa_problem(NULL, "invalid reference to a deleted texture object");
+ return GL_FALSE;
+ default:
+ _mesa_problem(NULL, "invalid texture object Target value");
+ return GL_FALSE;
+ }
+}
+
+
+/**
+ * Reference (or unreference) a texture object.
+ * If '*ptr', decrement *ptr's refcount (and delete if it becomes zero).
+ * If 'tex' is non-null, increment its refcount.
+ */
+void
+_mesa_reference_texobj(struct gl_texture_object **ptr,
+ struct gl_texture_object *tex)
+{
+ assert(ptr);
+ if (*ptr == tex) {
+ /* no change */
+ return;
+ }
+
+ if (*ptr) {
+ /* Unreference the old texture */
+ GLboolean deleteFlag = GL_FALSE;
+ struct gl_texture_object *oldTex = *ptr;
+
+ assert(valid_texture_object(oldTex));
+
+ _glthread_LOCK_MUTEX(oldTex->Mutex);
+ ASSERT(oldTex->RefCount > 0);
+ oldTex->RefCount--;
+
+ deleteFlag = (oldTex->RefCount == 0);
+ _glthread_UNLOCK_MUTEX(oldTex->Mutex);
+
+ if (deleteFlag) {
+ GET_CURRENT_CONTEXT(ctx);
+ if (ctx)
+ ctx->Driver.DeleteTexture(ctx, oldTex);
+ else
+ _mesa_problem(NULL, "Unable to delete texture, no context");
+ }
+
+ *ptr = NULL;
+ }
+ assert(!*ptr);
+
+ if (tex) {
+ /* reference new texture */
+ assert(valid_texture_object(tex));
+ _glthread_LOCK_MUTEX(tex->Mutex);
+ if (tex->RefCount == 0) {
+ /* this texture's being deleted (look just above) */
+ /* Not sure this can every really happen. Warn if it does. */
+ _mesa_problem(NULL, "referencing deleted texture object");
+ *ptr = NULL;
+ }
+ else {
+ tex->RefCount++;
+ *ptr = tex;
+ }
+ _glthread_UNLOCK_MUTEX(tex->Mutex);
+ }
+}
+
+
+
+/**
* Report why a texture object is incomplete.
*
* \param t texture object.
@@ -613,8 +711,7 @@ unbind_texobj_from_fbo(GLcontext *ctx, struct gl_texture_object *texObj)
/**
* Check if the given texture object is bound to any texture image units and
- * unbind it if so.
- * XXX all RefCount accesses should be protected by a mutex.
+ * unbind it if so (revert to default textures).
*/
static void
unbind_texobj_from_texunits(GLcontext *ctx, struct gl_texture_object *texObj)
@@ -623,42 +720,26 @@ unbind_texobj_from_texunits(GLcontext *ctx, struct gl_texture_object *texObj)
for (u = 0; u < MAX_TEXTURE_IMAGE_UNITS; u++) {
struct gl_texture_unit *unit = &ctx->Texture.Unit[u];
- struct gl_texture_object **curr = NULL;
-
if (texObj == unit->Current1D) {
- curr = &unit->Current1D;
- unit->Current1D = ctx->Shared->Default1D;
+ _mesa_reference_texobj(&unit->Current1D, ctx->Shared->Default1D);
}
else if (texObj == unit->Current2D) {
- curr = &unit->Current2D;
- unit->Current2D = ctx->Shared->Default2D;
+ _mesa_reference_texobj(&unit->Current2D, ctx->Shared->Default2D);
}
else if (texObj == unit->Current3D) {
- curr = &unit->Current3D;
- unit->Current3D = ctx->Shared->Default3D;
+ _mesa_reference_texobj(&unit->Current3D, ctx->Shared->Default3D);
}
else if (texObj == unit->CurrentCubeMap) {
- curr = &unit->CurrentCubeMap;
- unit->CurrentCubeMap = ctx->Shared->DefaultCubeMap;
+ _mesa_reference_texobj(&unit->CurrentCubeMap, ctx->Shared->DefaultCubeMap);
}
else if (texObj == unit->CurrentRect) {
- curr = &unit->CurrentRect;
- unit->CurrentRect = ctx->Shared->DefaultRect;
+ _mesa_reference_texobj(&unit->CurrentRect, ctx->Shared->DefaultRect);
}
else if (texObj == unit->Current1DArray) {
- curr = &unit->Current1DArray;
- unit->CurrentRect = ctx->Shared->Default1DArray;
+ _mesa_reference_texobj(&unit->Current1DArray, ctx->Shared->Default1DArray);
}
else if (texObj == unit->Current2DArray) {
- curr = &unit->Current1DArray;
- unit->CurrentRect = ctx->Shared->Default2DArray;
- }
-
- if (curr) {
- (*curr)->RefCount++;
- texObj->RefCount--;
- if (texObj == unit->_Current)
- unit->_Current = *curr;
+ _mesa_reference_texobj(&unit->Current2DArray, ctx->Shared->Default2DArray);
}
}
}
@@ -694,8 +775,6 @@ _mesa_DeleteTextures( GLsizei n, const GLuint *textures)
= _mesa_lookup_texture(ctx, textures[i]);
if (delObj) {
- GLboolean deleted;
-
_mesa_lock_texture(ctx, delObj);
/* Check if texture is bound to any framebuffer objects.
@@ -705,10 +784,12 @@ _mesa_DeleteTextures( GLsizei n, const GLuint *textures)
unbind_texobj_from_fbo(ctx, delObj);
/* Check if this texture is currently bound to any texture units.
- * If so, unbind it and decrement the reference count.
+ * If so, unbind it.
*/
unbind_texobj_from_texunits(ctx, delObj);
+ _mesa_unlock_texture(ctx, delObj);
+
ctx->NewState |= _NEW_TEXTURE;
/* The texture _name_ is now free for re-use.
@@ -718,23 +799,10 @@ _mesa_DeleteTextures( GLsizei n, const GLuint *textures)
_mesa_HashRemove(ctx->Shared->TexObjects, delObj->Name);
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
- /* The actual texture object will not be freed until it's no
- * longer bound in any context.
- * XXX all RefCount accesses should be protected by a mutex.
+ /* Unreference the texobj. If refcount hits zero, the texture
+ * will be deleted.
*/
- delObj->RefCount--;
- deleted = (delObj->RefCount == 0);
- _mesa_unlock_texture(ctx, delObj);
-
- /* We know that refcount went to zero above, so this is
- * the only pointer left to delObj, so we don't have to
- * worry about locking any more:
- */
- if (deleted) {
- ASSERT(delObj->Name != 0); /* Never delete default tex objs */
- ASSERT(ctx->Driver.DeleteTexture);
- (*ctx->Driver.DeleteTexture)(ctx, delObj);
- }
+ _mesa_reference_texobj(&delObj, NULL);
}
}
}
@@ -762,7 +830,6 @@ _mesa_BindTexture( GLenum target, GLuint texName )
GET_CURRENT_CONTEXT(ctx);
const GLuint unit = ctx->Texture.CurrentUnit;
struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
- struct gl_texture_object *oldTexObj;
struct gl_texture_object *newTexObj = NULL;
ASSERT_OUTSIDE_BEGIN_END(ctx);
@@ -771,62 +838,6 @@ _mesa_BindTexture( GLenum target, GLuint texName )
_mesa_lookup_enum_by_nr(target), (GLint) texName);
/*
- * Get pointer to currently bound texture object (oldTexObj)
- */
- switch (target) {
- case GL_TEXTURE_1D:
- oldTexObj = texUnit->Current1D;
- break;
- case GL_TEXTURE_2D:
- oldTexObj = texUnit->Current2D;
- break;
- case GL_TEXTURE_3D:
- oldTexObj = texUnit->Current3D;
- break;
- case GL_TEXTURE_CUBE_MAP_ARB:
- if (!ctx->Extensions.ARB_texture_cube_map) {
- _mesa_error( ctx, GL_INVALID_ENUM, "glBindTexture(target)" );
- return;
- }
- oldTexObj = texUnit->CurrentCubeMap;
- break;
- case GL_TEXTURE_RECTANGLE_NV:
- if (!ctx->Extensions.NV_texture_rectangle) {
- _mesa_error( ctx, GL_INVALID_ENUM, "glBindTexture(target)" );
- return;
- }
- oldTexObj = texUnit->CurrentRect;
- break;
- case GL_TEXTURE_1D_ARRAY_EXT:
- if (!ctx->Extensions.MESA_texture_array) {
- _mesa_error( ctx, GL_INVALID_ENUM, "glBindTexture(target)" );
- return;
- }
- oldTexObj = texUnit->Current1DArray;
- break;
- case GL_TEXTURE_2D_ARRAY_EXT:
- if (!ctx->Extensions.MESA_texture_array) {
- _mesa_error( ctx, GL_INVALID_ENUM, "glBindTexture(target)" );
- return;
- }
- oldTexObj = texUnit->Current2DArray;
- break;
- default:
- _mesa_error( ctx, GL_INVALID_ENUM, "glBindTexture(target)" );
- return;
- }
-
- if (oldTexObj->Name == texName) {
- /* XXX this might be wrong. If the texobj is in use by another
- * context and a texobj parameter was changed, this might be our
- * only chance to update this context's hardware state.
- * Note that some applications re-bind the same texture a lot so we
- * want to handle that case quickly.
- */
- return; /* rebinding the same texture- no change */
- }
-
- /*
* Get pointer to new texture object (newTexObj)
*/
if (texName == 0) {
@@ -854,7 +865,8 @@ _mesa_BindTexture( GLenum target, GLuint texName )
newTexObj = ctx->Shared->Default2DArray;
break;
default:
- ; /* Bad targets are caught above */
+ _mesa_error(ctx, GL_INVALID_ENUM, "glBindTexture(target)");
+ return;
}
}
else {
@@ -900,28 +912,30 @@ _mesa_BindTexture( GLenum target, GLuint texName )
newTexObj->Target = target;
}
- /* XXX all RefCount accesses should be protected by a mutex. */
- newTexObj->RefCount++;
+ assert(valid_texture_object(newTexObj));
- /* do the actual binding, but first flush outstanding vertices:
- */
+ /* flush before changing binding */
FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+ /* Do the actual binding. The refcount on the previously bound
+ * texture object will be decremented. It'll be deleted if the
+ * count hits zero.
+ */
switch (target) {
case GL_TEXTURE_1D:
- texUnit->Current1D = newTexObj;
+ _mesa_reference_texobj(&texUnit->Current1D, newTexObj);
break;
case GL_TEXTURE_2D:
- texUnit->Current2D = newTexObj;
+ _mesa_reference_texobj(&texUnit->Current2D, newTexObj);
break;
case GL_TEXTURE_3D:
- texUnit->Current3D = newTexObj;
+ _mesa_reference_texobj(&texUnit->Current3D, newTexObj);
break;
case GL_TEXTURE_CUBE_MAP_ARB:
- texUnit->CurrentCubeMap = newTexObj;
+ _mesa_reference_texobj(&texUnit->CurrentCubeMap, newTexObj);
break;
case GL_TEXTURE_RECTANGLE_NV:
- texUnit->CurrentRect = newTexObj;
+ _mesa_reference_texobj(&texUnit->CurrentRect, newTexObj);
break;
case GL_TEXTURE_1D_ARRAY_EXT:
texUnit->Current1DArray = newTexObj;
@@ -930,6 +944,7 @@ _mesa_BindTexture( GLenum target, GLuint texName )
texUnit->Current2DArray = newTexObj;
break;
default:
+ /* Bad target should be caught above */
_mesa_problem(ctx, "bad target in BindTexture");
return;
}
@@ -937,18 +952,6 @@ _mesa_BindTexture( GLenum target, GLuint texName )
/* Pass BindTexture call to device driver */
if (ctx->Driver.BindTexture)
(*ctx->Driver.BindTexture)( ctx, target, newTexObj );
-
- /* Decrement the reference count on the old texture and check if it's
- * time to delete it.
- */
- /* XXX all RefCount accesses should be protected by a mutex. */
- oldTexObj->RefCount--;
- ASSERT(oldTexObj->RefCount >= 0);
- if (oldTexObj->RefCount == 0) {
- ASSERT(oldTexObj->Name != 0);
- ASSERT(ctx->Driver.DeleteTexture);
- (*ctx->Driver.DeleteTexture)( ctx, oldTexObj );
- }
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-16 19:52:24 +0000