/* * Mesa 3-D graphics library * * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. * Copyright (C) 2009 VMware, Inc. 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 * THE AUTHORS OR COPYRIGHT HOLDERS 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. */ /** * \file bufferobj.c * \brief Functions for the GL_ARB_vertex/pixel_buffer_object extensions. * \author Brian Paul, Ian Romanick */ #include #include "glheader.h" #include "enums.h" #include "hash.h" #include "imports.h" #include "image.h" #include "context.h" #include "bufferobj.h" #include "fbobject.h" #include "mtypes.h" #include "texobj.h" #include "transformfeedback.h" #include "dispatch.h" /* Debug flags */ /*#define VBO_DEBUG*/ /*#define BOUNDS_CHECK*/ /** * Used as a placeholder for buffer objects between glGenBuffers() and * glBindBuffer() so that glIsBuffer() can work correctly. */ static struct gl_buffer_object DummyBufferObject; /** * Return pointer to address of a buffer object target. * \param ctx the GL context * \param target the buffer object target to be retrieved. * \return pointer to pointer to the buffer object bound to \c target in the * specified context or \c NULL if \c target is invalid. */ static inline struct gl_buffer_object ** get_buffer_target(struct gl_context *ctx, GLenum target) { /* Other targets are only supported in desktop OpenGL and OpenGL ES 3.0. */ if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx) && target != GL_ARRAY_BUFFER && target != GL_ELEMENT_ARRAY_BUFFER) return NULL; switch (target) { case GL_ARRAY_BUFFER_ARB: return &ctx->Array.ArrayBufferObj; case GL_ELEMENT_ARRAY_BUFFER_ARB: return &ctx->Array.ArrayObj->ElementArrayBufferObj; case GL_PIXEL_PACK_BUFFER_EXT: return &ctx->Pack.BufferObj; case GL_PIXEL_UNPACK_BUFFER_EXT: return &ctx->Unpack.BufferObj; case GL_COPY_READ_BUFFER: return &ctx->CopyReadBuffer; case GL_COPY_WRITE_BUFFER: return &ctx->CopyWriteBuffer; case GL_DRAW_INDIRECT_BUFFER: if (ctx->API == API_OPENGL_CORE && ctx->Extensions.ARB_draw_indirect) { return &ctx->DrawIndirectBuffer; } break; case GL_TRANSFORM_FEEDBACK_BUFFER: if (ctx->Extensions.EXT_transform_feedback) { return &ctx->TransformFeedback.CurrentBuffer; } break; case GL_TEXTURE_BUFFER: if (ctx->API == API_OPENGL_CORE && ctx->Extensions.ARB_texture_buffer_object) { return &ctx->Texture.BufferObject; } break; case GL_UNIFORM_BUFFER: if (ctx->Extensions.ARB_uniform_buffer_object) { return &ctx->UniformBuffer; } break; case GL_ATOMIC_COUNTER_BUFFER: if (ctx->Extensions.ARB_shader_atomic_counters) { return &ctx->AtomicBuffer; } break; default: return NULL; } return NULL; } /** * Get the buffer object bound to the specified target in a GL context. * \param ctx the GL context * \param target the buffer object target to be retrieved. * \return pointer to the buffer object bound to \c target in the * specified context or \c NULL if \c target is invalid. */ static inline struct gl_buffer_object * get_buffer(struct gl_context *ctx, const char *func, GLenum target) { struct gl_buffer_object **bufObj = get_buffer_target(ctx, target); if (!bufObj) { _mesa_error(ctx, GL_INVALID_ENUM, "%s(target)", func); return NULL; } if (!_mesa_is_bufferobj(*bufObj)) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(buffer 0)", func); return NULL; } return *bufObj; } /** * Convert a GLbitfield describing the mapped buffer access flags * into one of GL_READ_WRITE, GL_READ_ONLY, or GL_WRITE_ONLY. */ static GLenum simplified_access_mode(struct gl_context *ctx, GLbitfield access) { const GLbitfield rwFlags = GL_MAP_READ_BIT | GL_MAP_WRITE_BIT; if ((access & rwFlags) == rwFlags) return GL_READ_WRITE; if ((access & GL_MAP_READ_BIT) == GL_MAP_READ_BIT) return GL_READ_ONLY; if ((access & GL_MAP_WRITE_BIT) == GL_MAP_WRITE_BIT) return GL_WRITE_ONLY; /* Otherwise, AccessFlags is zero (the default state). * * Table 2.6 on page 31 (page 44 of the PDF) of the OpenGL 1.5 spec says: * * Name Type Initial Value Legal Values * ... ... ... ... * BUFFER_ACCESS enum READ_WRITE READ_ONLY, WRITE_ONLY * READ_WRITE * * However, table 6.8 in the GL_OES_mapbuffer extension says: * * Get Value Type Get Command Value Description * --------- ---- ----------- ----- ----------- * BUFFER_ACCESS_OES Z1 GetBufferParameteriv WRITE_ONLY_OES buffer map flag * * The difference is because GL_OES_mapbuffer only supports mapping buffers * write-only. */ assert(access == 0); return _mesa_is_gles(ctx) ? GL_WRITE_ONLY : GL_READ_WRITE; } /** * Test if the buffer is mapped, and if so, if the mapped range overlaps the * given range. * The regions do not overlap if and only if the end of the given * region is before the mapped region or the start of the given region * is after the mapped region. * * \param obj Buffer object target on which to operate. * \param offset Offset of the first byte of the subdata range. * \param size Size, in bytes, of the subdata range. * \return true if ranges overlap, false otherwise * */ static bool bufferobj_range_mapped(const struct gl_buffer_object *obj, GLintptr offset, GLsizeiptr size) { if (_mesa_bufferobj_mapped(obj)) { const GLintptr end = offset + size; const GLintptr mapEnd = obj->Offset + obj->Length; if (!(end <= obj->Offset || offset >= mapEnd)) { return true; } } return false; } /** * Tests the subdata range parameters and sets the GL error code for * \c glBufferSubDataARB, \c glGetBufferSubDataARB and * \c glClearBufferSubData. * * \param ctx GL context. * \param target Buffer object target on which to operate. * \param offset Offset of the first byte of the subdata range. * \param size Size, in bytes, of the subdata range. * \param mappedRange If true, checks if an overlapping range is mapped. * If false, checks if buffer is mapped. * \param caller Name of calling function for recording errors. * \return A pointer to the buffer object bound to \c target in the * specified context or \c NULL if any of the parameter or state * conditions are invalid. * * \sa glBufferSubDataARB, glGetBufferSubDataARB, glClearBufferSubData */ static struct gl_buffer_object * buffer_object_subdata_range_good(struct gl_context * ctx, GLenum target, GLintptrARB offset, GLsizeiptrARB size, bool mappedRange, const char *caller) { struct gl_buffer_object *bufObj; if (size < 0) { _mesa_error(ctx, GL_INVALID_VALUE, "%s(size < 0)", caller); return NULL; } if (offset < 0) { _mesa_error(ctx, GL_INVALID_VALUE, "%s(offset < 0)", caller); return NULL; } bufObj = get_buffer(ctx, caller, target); if (!bufObj) return NULL; if (offset + size > bufObj->Size) { _mesa_error(ctx, GL_INVALID_VALUE, "%s(offset %lu + size %lu > buffer size %lu)", caller, (unsigned long) offset, (unsigned long) size, (unsigned long) bufObj->Size); return NULL; } if (mappedRange) { if (bufferobj_range_mapped(bufObj, offset, size)) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s", caller); return NULL; } } else { if (_mesa_bufferobj_mapped(bufObj)) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s", caller); return NULL; } } return bufObj; } /** * Allocate and initialize a new buffer object. * * Default callback for the \c dd_function_table::NewBufferObject() hook. */ static struct gl_buffer_object * _mesa_new_buffer_object( struct gl_context *ctx, GLuint name, GLenum target ) { struct gl_buffer_object *obj; (void) ctx; obj = MALLOC_STRUCT(gl_buffer_object); _mesa_initialize_buffer_object(ctx, obj, name, target); return obj; } /** * Delete a buffer object. * * Default callback for the \c dd_function_table::DeleteBuffer() hook. */ static void _mesa_delete_buffer_object(struct gl_context *ctx, struct gl_buffer_object *bufObj) { (void) ctx; free(bufObj->Data); /* assign strange values here to help w/ debugging */ bufObj->RefCount = -1000; bufObj->Name = ~0; _glthread_DESTROY_MUTEX(bufObj->Mutex); free(bufObj->Label); free(bufObj); } /** * Set ptr to bufObj w/ reference counting. * This is normally only called from the _mesa_reference_buffer_object() macro * when there's a real pointer change. */ void _mesa_reference_buffer_object_(struct gl_context *ctx, struct gl_buffer_object **ptr, struct gl_buffer_object *bufObj) { if (*ptr) { /* Unreference the old buffer */ GLboolean deleteFlag = GL_FALSE; struct gl_buffer_object *oldObj = *ptr; _glthread_LOCK_MUTEX(oldObj->Mutex); ASSERT(oldObj->RefCount > 0); oldObj->RefCount--; #if 0 printf("BufferObj %p %d DECR to %d\n", (void *) oldObj, oldObj->Name, oldObj->RefCount); #endif deleteFlag = (oldObj->RefCount == 0); _glthread_UNLOCK_MUTEX(oldObj->Mutex); if (deleteFlag) { /* some sanity checking: don't delete a buffer still in use */ #if 0 /* unfortunately, these tests are invalid during context tear-down */ ASSERT(ctx->Array.ArrayBufferObj != bufObj); ASSERT(ctx->Array.ArrayObj->ElementArrayBufferObj != bufObj); ASSERT(ctx->Array.ArrayObj->Vertex.BufferObj != bufObj); #endif ASSERT(ctx->Driver.DeleteBuffer); ctx->Driver.DeleteBuffer(ctx, oldObj); } *ptr = NULL; } ASSERT(!*ptr); if (bufObj) { /* reference new buffer */ _glthread_LOCK_MUTEX(bufObj->Mutex); if (bufObj->RefCount == 0) { /* this buffer's being deleted (look just above) */ /* Not sure this can every really happen. Warn if it does. */ _mesa_problem(NULL, "referencing deleted buffer object"); *ptr = NULL; } else { bufObj->RefCount++; #if 0 printf("BufferObj %p %d INCR to %d\n", (void *) bufObj, bufObj->Name, bufObj->RefCount); #endif *ptr = bufObj; } _glthread_UNLOCK_MUTEX(bufObj->Mutex); } } /** * Initialize a buffer object to default values. */ void _mesa_initialize_buffer_object( struct gl_context *ctx, struct gl_buffer_object *obj, GLuint name, GLenum target ) { (void) target; memset(obj, 0, sizeof(struct gl_buffer_object)); _glthread_INIT_MUTEX(obj->Mutex); obj->RefCount = 1; obj->Name = name; obj->Usage = GL_STATIC_DRAW_ARB; obj->AccessFlags = 0; } /** * Callback called from _mesa_HashWalk() */ static void count_buffer_size(GLuint key, void *data, void *userData) { const struct gl_buffer_object *bufObj = (const struct gl_buffer_object *) data; GLuint *total = (GLuint *) userData; *total = *total + bufObj->Size; } /** * Compute total size (in bytes) of all buffer objects for the given context. * For debugging purposes. */ GLuint _mesa_total_buffer_object_memory(struct gl_context *ctx) { GLuint total = 0; _mesa_HashWalk(ctx->Shared->BufferObjects, count_buffer_size, &total); return total; } /** * Allocate space for and store data in a buffer object. Any data that was * previously stored in the buffer object is lost. If \c data is \c NULL, * memory will be allocated, but no copy will occur. * * This is the default callback for \c dd_function_table::BufferData() * Note that all GL error checking will have been done already. * * \param ctx GL context. * \param target Buffer object target on which to operate. * \param size Size, in bytes, of the new data store. * \param data Pointer to the data to store in the buffer object. This * pointer may be \c NULL. * \param usage Hints about how the data will be used. * \param bufObj Object to be used. * * \return GL_TRUE for success, GL_FALSE for failure * \sa glBufferDataARB, dd_function_table::BufferData. */ static GLboolean _mesa_buffer_data( struct gl_context *ctx, GLenum target, GLsizeiptrARB size, const GLvoid * data, GLenum usage, struct gl_buffer_object * bufObj ) { void * new_data; (void) ctx; (void) target; new_data = _mesa_realloc( bufObj->Data, bufObj->Size, size ); if (new_data) { bufObj->Data = (GLubyte *) new_data; bufObj->Size = size; bufObj->Usage = usage; if (data) { memcpy( bufObj->Data, data, size ); } return GL_TRUE; } else { return GL_FALSE; } } /** * Replace data in a subrange of buffer object. If the data range * specified by \c size + \c offset extends beyond the end of the buffer or * if \c data is \c NULL, no copy is performed. * * This is the default callback for \c dd_function_table::BufferSubData() * Note that all GL error checking will have been done already. * * \param ctx GL context. * \param offset Offset of the first byte to be modified. * \param size Size, in bytes, of the data range. * \param data Pointer to the data to store in the buffer object. * \param bufObj Object to be used. * * \sa glBufferSubDataARB, dd_function_table::BufferSubData. */ static void _mesa_buffer_subdata( struct gl_context *ctx, GLintptrARB offset, GLsizeiptrARB size, const GLvoid * data, struct gl_buffer_object * bufObj ) { (void) ctx; /* this should have been caught in _mesa_BufferSubData() */ ASSERT(size + offset <= bufObj->Size); if (bufObj->Data) { memcpy( (GLubyte *) bufObj->Data + offset, data, size ); } } /** * Retrieve data from a subrange of buffer object. If the data range * specified by \c size + \c offset extends beyond the end of the buffer or * if \c data is \c NULL, no copy is performed. * * This is the default callback for \c dd_function_table::GetBufferSubData() * Note that all GL error checking will have been done already. * * \param ctx GL context. * \param target Buffer object target on which to operate. * \param offset Offset of the first byte to be fetched. * \param size Size, in bytes, of the data range. * \param data Destination for data * \param bufObj Object to be used. * * \sa glBufferGetSubDataARB, dd_function_table::GetBufferSubData. */ static void _mesa_buffer_get_subdata( struct gl_context *ctx, GLintptrARB offset, GLsizeiptrARB size, GLvoid * data, struct gl_buffer_object * bufObj ) { (void) ctx; if (bufObj->Data && ((GLsizeiptrARB) (size + offset) <= bufObj->Size)) { memcpy( data, (GLubyte *) bufObj->Data + offset, size ); } } /** * Default fallback for \c dd_function_table::MapBufferRange(). * Called via glMapBufferRange(). */ static void * _mesa_buffer_map_range( struct gl_context *ctx, GLintptr offset, GLsizeiptr length, GLbitfield access, struct gl_buffer_object *bufObj ) { (void) ctx; assert(!_mesa_bufferobj_mapped(bufObj)); /* Just return a direct pointer to the data */ bufObj->Pointer = bufObj->Data + offset; bufObj->Length = length; bufObj->Offset = offset; bufObj->AccessFlags = access; return bufObj->Pointer; } /** * Default fallback for \c dd_function_table::FlushMappedBufferRange(). * Called via glFlushMappedBufferRange(). */ static void _mesa_buffer_flush_mapped_range( struct gl_context *ctx, GLintptr offset, GLsizeiptr length, struct gl_buffer_object *obj ) { (void) ctx; (void) offset; (void) length; (void) obj; /* no-op */ } /** * Default callback for \c dd_function_table::MapBuffer(). * * The input parameters will have been already tested for errors. * * \sa glUnmapBufferARB, dd_function_table::UnmapBuffer */ static GLboolean _mesa_buffer_unmap( struct gl_context *ctx, struct gl_buffer_object *bufObj ) { (void) ctx; /* XXX we might assert here that bufObj->Pointer is non-null */ bufObj->Pointer = NULL; bufObj->Length = 0; bufObj->Offset = 0; bufObj->AccessFlags = 0x0; return GL_TRUE; } /** * Default fallback for \c dd_function_table::CopyBufferSubData(). * Called via glCopyBufferSubData(). */ static void _mesa_copy_buffer_subdata(struct gl_context *ctx, struct gl_buffer_object *src, struct gl_buffer_object *dst, GLintptr readOffset, GLintptr writeOffset, GLsizeiptr size) { GLubyte *srcPtr, *dstPtr; /* the buffers should not be mapped */ assert(!_mesa_bufferobj_mapped(src)); assert(!_mesa_bufferobj_mapped(dst)); if (src == dst) { srcPtr = dstPtr = ctx->Driver.MapBufferRange(ctx, 0, src->Size, GL_MAP_READ_BIT | GL_MAP_WRITE_BIT, src); if (!srcPtr) return; srcPtr += readOffset; dstPtr += writeOffset; } else { srcPtr = ctx->Driver.MapBufferRange(ctx, readOffset, size, GL_MAP_READ_BIT, src); dstPtr = ctx->Driver.MapBufferRange(ctx, writeOffset, size, (GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_RANGE_BIT), dst); } /* Note: the src and dst regions will never overlap. Trying to do so * would generate GL_INVALID_VALUE earlier. */ if (srcPtr && dstPtr) memcpy(dstPtr, srcPtr, size); ctx->Driver.UnmapBuffer(ctx, src); if (dst != src) ctx->Driver.UnmapBuffer(ctx, dst); } /** * Initialize the state associated with buffer objects */ void _mesa_init_buffer_objects( struct gl_context *ctx ) { GLuint i; memset(&DummyBufferObject, 0, sizeof(DummyBufferObject)); _glthread_INIT_MUTEX(DummyBufferObject.Mutex); DummyBufferObject.RefCount = 1000*1000*1000; /* never delete */ _mesa_reference_buffer_object(ctx, &ctx->Array.ArrayBufferObj, ctx->Shared->NullBufferObj); _mesa_reference_buffer_object(ctx, &ctx->CopyReadBuffer, ctx->Shared->NullBufferObj); _mesa_reference_buffer_object(ctx, &ctx->CopyWriteBuffer, ctx->Shared->NullBufferObj); _mesa_reference_buffer_object(ctx, &ctx->UniformBuffer, ctx->Shared->NullBufferObj); _mesa_reference_buffer_object(ctx, &ctx->DrawIndirectBuffer, ctx->Shared->NullBufferObj); for (i = 0; i < MAX_COMBINED_UNIFORM_BUFFERS; i++) { _mesa_reference_buffer_object(ctx, &ctx->UniformBufferBindings[i].BufferObject, ctx->Shared->NullBufferObj); ctx->UniformBufferBindings[i].Offset = -1; ctx->UniformBufferBindings[i].Size = -1; } } void _mesa_free_buffer_objects( struct gl_context *ctx ) { GLuint i; _mesa_reference_buffer_object(ctx, &ctx->Array.ArrayBufferObj, NULL); _mesa_reference_buffer_object(ctx, &ctx->CopyReadBuffer, NULL); _mesa_reference_buffer_object(ctx, &ctx->CopyWriteBuffer, NULL); _mesa_reference_buffer_object(ctx, &ctx->UniformBuffer, NULL); for (i = 0; i < MAX_COMBINED_UNIFORM_BUFFERS; i++) { _mesa_reference_buffer_object(ctx, &ctx->UniformBufferBindings[i].BufferObject, NULL); } } bool _mesa_handle_bind_buffer_gen(struct gl_context *ctx, GLenum target, GLuint buffer, struct gl_buffer_object **buf_handle, const char *caller) { struct gl_buffer_object *buf = *buf_handle; if (!buf && ctx->API == API_OPENGL_CORE) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(non-gen name)", caller); return false; } if (!buf || buf == &DummyBufferObject) { /* If this is a new buffer object id, or one which was generated but * never used before, allocate a buffer object now. */ ASSERT(ctx->Driver.NewBufferObject); buf = ctx->Driver.NewBufferObject(ctx, buffer, target); if (!buf) { _mesa_error(ctx, GL_OUT_OF_MEMORY, "%s", caller); return false; } _mesa_HashInsert(ctx->Shared->BufferObjects, buffer, buf); *buf_handle = buf; } return true; } /** * Bind the specified target to buffer for the specified context. * Called by glBindBuffer() and other functions. */ static void bind_buffer_object(struct gl_context *ctx, GLenum target, GLuint buffer) { struct gl_buffer_object *oldBufObj; struct gl_buffer_object *newBufObj = NULL; struct gl_buffer_object **bindTarget = NULL; bindTarget = get_buffer_target(ctx, target); if (!bindTarget) { _mesa_error(ctx, GL_INVALID_ENUM, "glBindBufferARB(target 0x%x)", target); return; } /* Get pointer to old buffer object (to be unbound) */ oldBufObj = *bindTarget; if (oldBufObj && oldBufObj->Name == buffer && !oldBufObj->DeletePending) return; /* rebinding the same buffer object- no change */ /* * Get pointer to new buffer object (newBufObj) */ if (buffer == 0) { /* The spec says there's not a buffer object named 0, but we use * one internally because it simplifies things. */ newBufObj = ctx->Shared->NullBufferObj; } else { /* non-default buffer object */ newBufObj = _mesa_lookup_bufferobj(ctx, buffer); if (!_mesa_handle_bind_buffer_gen(ctx, target, buffer, &newBufObj, "glBindBuffer")) return; } /* bind new buffer */ _mesa_reference_buffer_object(ctx, bindTarget, newBufObj); /* Pass BindBuffer call to device driver */ if (ctx->Driver.BindBuffer) ctx->Driver.BindBuffer( ctx, target, newBufObj ); } /** * Update the default buffer objects in the given context to reference those * specified in the shared state and release those referencing the old * shared state. */ void _mesa_update_default_objects_buffer_objects(struct gl_context *ctx) { /* Bind the NullBufferObj to remove references to those * in the shared context hash table. */ bind_buffer_object( ctx, GL_ARRAY_BUFFER_ARB, 0); bind_buffer_object( ctx, GL_ELEMENT_ARRAY_BUFFER_ARB, 0); bind_buffer_object( ctx, GL_PIXEL_PACK_BUFFER_ARB, 0); bind_buffer_object( ctx, GL_PIXEL_UNPACK_BUFFER_ARB, 0); } /** * Return the gl_buffer_object for the given ID. * Always return NULL for ID 0. */ struct gl_buffer_object * _mesa_lookup_bufferobj(struct gl_context *ctx, GLuint buffer) { if (buffer == 0) return NULL; else return (struct gl_buffer_object *) _mesa_HashLookup(ctx->Shared->BufferObjects, buffer); } /** * If *ptr points to obj, set ptr = the Null/default buffer object. * This is a helper for buffer object deletion. * The GL spec says that deleting a buffer object causes it to get * unbound from all arrays in the current context. */ static void unbind(struct gl_context *ctx, struct gl_buffer_object **ptr, struct gl_buffer_object *obj) { if (*ptr == obj) { _mesa_reference_buffer_object(ctx, ptr, ctx->Shared->NullBufferObj); } } /** * Plug default/fallback buffer object functions into the device * driver hooks. */ void _mesa_init_buffer_object_functions(struct dd_function_table *driver) { /* GL_ARB_vertex/pixel_buffer_object */ driver->NewBufferObject = _mesa_new_buffer_object; driver->DeleteBuffer = _mesa_delete_buffer_object; driver->BindBuffer = NULL; driver->BufferData = _mesa_buffer_data; driver->BufferSubData = _mesa_buffer_subdata; driver->GetBufferSubData = _mesa_buffer_get_subdata; driver->UnmapBuffer = _mesa_buffer_unmap; /* GL_ARB_map_buffer_range */ driver->MapBufferRange = _mesa_buffer_map_range; driver->FlushMappedBufferRange = _mesa_buffer_flush_mapped_range; /* GL_ARB_copy_buffer */ driver->CopyBufferSubData = _mesa_copy_buffer_subdata; } /**********************************************************************/ /* API Functions */ /**********************************************************************/ void GLAPIENTRY _mesa_BindBuffer(GLenum target, GLuint buffer) { GET_CURRENT_CONTEXT(ctx); if (MESA_VERBOSE & VERBOSE_API) _mesa_debug(ctx, "glBindBuffer(%s, %u)\n", _mesa_lookup_enum_by_nr(target), buffer); bind_buffer_object(ctx, target, buffer); } /** * Delete a set of buffer objects. * * \param n Number of buffer objects to delete. * \param ids Array of \c n buffer object IDs. */ void GLAPIENTRY _mesa_DeleteBuffers(GLsizei n, const GLuint *ids) { GET_CURRENT_CONTEXT(ctx); GLsizei i; FLUSH_VERTICES(ctx, 0); if (n < 0) { _mesa_error(ctx, GL_INVALID_VALUE, "glDeleteBuffersARB(n)"); return; } _glthread_LOCK_MUTEX(ctx->Shared->Mutex); for (i = 0; i < n; i++) { struct gl_buffer_object *bufObj = _mesa_lookup_bufferobj(ctx, ids[i]); if (bufObj) { struct gl_array_object *arrayObj = ctx->Array.ArrayObj; GLuint j; ASSERT(bufObj->Name == ids[i] || bufObj == &DummyBufferObject); if (_mesa_bufferobj_mapped(bufObj)) { /* if mapped, unmap it now */ ctx->Driver.UnmapBuffer(ctx, bufObj); bufObj->AccessFlags = 0; bufObj->Pointer = NULL; } /* unbind any vertex pointers bound to this buffer */ for (j = 0; j < Elements(arrayObj->VertexBinding); j++) { unbind(ctx, &arrayObj->VertexBinding[j].BufferObj, bufObj); } if (ctx->Array.ArrayBufferObj == bufObj) { _mesa_BindBuffer( GL_ARRAY_BUFFER_ARB, 0 ); } if (arrayObj->ElementArrayBufferObj == bufObj) { _mesa_BindBuffer( GL_ELEMENT_ARRAY_BUFFER_ARB, 0 ); } /* unbind ARB_draw_indirect binding point */ if (ctx->DrawIndirectBuffer == bufObj) { _mesa_BindBuffer( GL_DRAW_INDIRECT_BUFFER, 0 ); } /* unbind ARB_copy_buffer binding points */ if (ctx->CopyReadBuffer == bufObj) { _mesa_BindBuffer( GL_COPY_READ_BUFFER, 0 ); } if (ctx->CopyWriteBuffer == bufObj) { _mesa_BindBuffer( GL_COPY_WRITE_BUFFER, 0 ); } /* unbind transform feedback binding points */ if (ctx->TransformFeedback.CurrentBuffer == bufObj) { _mesa_BindBuffer( GL_TRANSFORM_FEEDBACK_BUFFER, 0 ); } for (j = 0; j < MAX_FEEDBACK_BUFFERS; j++) { if (ctx->TransformFeedback.CurrentObject->Buffers[j] == bufObj) { _mesa_BindBufferBase( GL_TRANSFORM_FEEDBACK_BUFFER, j, 0 ); } } /* unbind UBO binding points */ for (j = 0; j < ctx->Const.MaxUniformBufferBindings; j++) { if (ctx->UniformBufferBindings[j].BufferObject == bufObj) { _mesa_BindBufferBase( GL_UNIFORM_BUFFER, j, 0 ); } } if (ctx->UniformBuffer == bufObj) { _mesa_BindBuffer( GL_UNIFORM_BUFFER, 0 ); } /* unbind any pixel pack/unpack pointers bound to this buffer */ if (ctx->Pack.BufferObj == bufObj) { _mesa_BindBuffer( GL_PIXEL_PACK_BUFFER_EXT, 0 ); } if (ctx->Unpack.BufferObj == bufObj) { _mesa_BindBuffer( GL_PIXEL_UNPACK_BUFFER_EXT, 0 ); } if (ctx->Texture.BufferObject == bufObj) { _mesa_BindBuffer( GL_TEXTURE_BUFFER, 0 ); } /* The ID is immediately freed for re-use */ _mesa_HashRemove(ctx->Shared->BufferObjects, ids[i]); /* Make sure we do not run into the classic ABA problem on bind. * We don't want to allow re-binding a buffer object that's been * "deleted" by glDeleteBuffers(). * * The explicit rebinding to the default object in the current context * prevents the above in the current context, but another context * sharing the same objects might suffer from this problem. * The alternative would be to do the hash lookup in any case on bind * which would introduce more runtime overhead than this. */ bufObj->DeletePending = GL_TRUE; _mesa_reference_buffer_object(ctx, &bufObj, NULL); } } _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex); } /** * Generate a set of unique buffer object IDs and store them in \c buffer. * * \param n Number of IDs to generate. * \param buffer Array of \c n locations to store the IDs. */ void GLAPIENTRY _mesa_GenBuffers(GLsizei n, GLuint *buffer) { GET_CURRENT_CONTEXT(ctx); GLuint first; GLint i; if (MESA_VERBOSE & VERBOSE_API) _mesa_debug(ctx, "glGenBuffers(%d)\n", n); if (n < 0) { _mesa_error(ctx, GL_INVALID_VALUE, "glGenBuffersARB"); return; } if (!buffer) { return; } /* * This must be atomic (generation and allocation of buffer object IDs) */ _glthread_LOCK_MUTEX(ctx->Shared->Mutex); first = _mesa_HashFindFreeKeyBlock(ctx->Shared->BufferObjects, n); /* Insert the ID and pointer to dummy buffer object into hash table */ for (i = 0; i < n; i++) { _mesa_HashInsert(ctx->Shared->BufferObjects, first + i, &DummyBufferObject); buffer[i] = first + i; } _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex); } /** * Determine if ID is the name of a buffer object. * * \param id ID of the potential buffer object. * \return \c GL_TRUE if \c id is the name of a buffer object, * \c GL_FALSE otherwise. */ GLboolean GLAPIENTRY _mesa_IsBuffer(GLuint id) { struct gl_buffer_object *bufObj; GET_CURRENT_CONTEXT(ctx); ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE); _glthread_LOCK_MUTEX(ctx->Shared->Mutex); bufObj = _mesa_lookup_bufferobj(ctx, id); _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex); return bufObj && bufObj != &DummyBufferObject; } void GLAPIENTRY _mesa_BufferData(GLenum target, GLsizeiptrARB size, const GLvoid * data, GLenum usage) { GET_CURRENT_CONTEXT(ctx); struct gl_buffer_object *bufObj; bool valid_usage; if (MESA_VERBOSE & VERBOSE_API) _mesa_debug(ctx, "glBufferData(%s, %ld, %p, %s)\n", _mesa_lookup_enum_by_nr(target), (long int) size, data, _mesa_lookup_enum_by_nr(usage)); if (size < 0) { _mesa_error(ctx, GL_INVALID_VALUE, "glBufferDataARB(size < 0)"); return; } switch (usage) { case GL_STREAM_DRAW_ARB: valid_usage = (ctx->API != API_OPENGLES); break; case GL_STATIC_DRAW_ARB: case GL_DYNAMIC_DRAW_ARB: valid_usage = true; break; case GL_STREAM_READ_ARB: case GL_STREAM_COPY_ARB: case GL_STATIC_READ_ARB: case GL_STATIC_COPY_ARB: case GL_DYNAMIC_READ_ARB: case GL_DYNAMIC_COPY_ARB: valid_usage = _mesa_is_desktop_gl(ctx) || _mesa_is_gles3(ctx); break; default: valid_usage = false; break; } if (!valid_usage) { _mesa_error(ctx, GL_INVALID_ENUM, "glBufferData(usage)"); return; } bufObj = get_buffer(ctx, "glBufferDataARB", target); if (!bufObj) return; if (_mesa_bufferobj_mapped(bufObj)) { /* Unmap the existing buffer. We'll replace it now. Not an error. */ ctx->Driver.UnmapBuffer(ctx, bufObj); bufObj->AccessFlags = 0; ASSERT(bufObj->Pointer == NULL); } FLUSH_VERTICES(ctx, _NEW_BUFFER_OBJECT); bufObj->Written = GL_TRUE; #ifdef VBO_DEBUG printf("glBufferDataARB(%u, sz %ld, from %p, usage 0x%x)\n", bufObj->Name, size, data, usage); #endif #ifdef BOUNDS_CHECK size += 100; #endif ASSERT(ctx->Driver.BufferData); if (!ctx->Driver.BufferData( ctx, target, size, data, usage, bufObj )) { _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBufferDataARB()"); } } void GLAPIENTRY _mesa_BufferSubData(GLenum target, GLintptrARB offset, GLsizeiptrARB size, const GLvoid * data) { GET_CURRENT_CONTEXT(ctx); struct gl_buffer_object *bufObj; bufObj = buffer_object_subdata_range_good( ctx, target, offset, size, false, "glBufferSubDataARB"); if (!bufObj) { /* error already recorded */ return; } if (size == 0) return; bufObj->Written = GL_TRUE; ASSERT(ctx->Driver.BufferSubData); ctx->Driver.BufferSubData( ctx, offset, size, data, bufObj ); } void GLAPIENTRY _mesa_GetBufferSubData(GLenum target, GLintptrARB offset, GLsizeiptrARB size, void * data) { GET_CURRENT_CONTEXT(ctx); struct gl_buffer_object *bufObj; bufObj = buffer_object_subdata_range_good(ctx, target, offset, size, false, "glGetBufferSubDataARB"); if (!bufObj) { /* error already recorded */ return; } ASSERT(ctx->Driver.GetBufferSubData); ctx->Driver.GetBufferSubData( ctx, offset, size, data, bufObj ); } void * GLAPIENTRY _mesa_MapBuffer(GLenum target, GLenum access) { GET_CURRENT_CONTEXT(ctx); struct gl_buffer_object * bufObj; GLbitfield accessFlags; void *map; bool valid_access; ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL); switch (access) { case GL_READ_ONLY_ARB: accessFlags = GL_MAP_READ_BIT; valid_access = _mesa_is_desktop_gl(ctx); break; case GL_WRITE_ONLY_ARB: accessFlags = GL_MAP_WRITE_BIT; valid_access = true; break; case GL_READ_WRITE_ARB: accessFlags = GL_MAP_READ_BIT | GL_MAP_WRITE_BIT; valid_access = _mesa_is_desktop_gl(ctx); break; default: valid_access = false; break; } if (!valid_access) { _mesa_error(ctx, GL_INVALID_ENUM, "glMapBufferARB(access)"); return NULL; } bufObj = get_buffer(ctx, "glMapBufferARB", target); if (!bufObj) return NULL; if (_mesa_bufferobj_mapped(bufObj)) { _mesa_error(ctx, GL_INVALID_OPERATION, "glMapBufferARB(already mapped)"); return NULL; } if (!bufObj->Size) { _mesa_error(ctx, GL_OUT_OF_MEMORY, "glMapBuffer(buffer size = 0)"); return NULL; } ASSERT(ctx->Driver.MapBufferRange); map = ctx->Driver.MapBufferRange(ctx, 0, bufObj->Size, accessFlags, bufObj); if (!map) { _mesa_error(ctx, GL_OUT_OF_MEMORY, "glMapBufferARB(map failed)"); return NULL; } else { /* The driver callback should have set these fields. * This is important because other modules (like VBO) might call * the driver function directly. */ ASSERT(bufObj->Pointer == map); ASSERT(bufObj->Length == bufObj->Size); ASSERT(bufObj->Offset == 0); bufObj->AccessFlags = accessFlags; } if (access == GL_WRITE_ONLY_ARB || access == GL_READ_WRITE_ARB) bufObj->Written = GL_TRUE; #ifdef VBO_DEBUG printf("glMapBufferARB(%u, sz %ld, access 0x%x)\n", bufObj->Name, bufObj->Size, access); if (access == GL_WRITE_ONLY_ARB) { GLuint i; GLubyte *b = (GLubyte *) bufObj->Pointer; for (i = 0; i < bufObj->Size; i++) b[i] = i & 0xff; } #endif #ifdef BOUNDS_CHECK { GLubyte *buf = (GLubyte *) bufObj->Pointer; GLuint i; /* buffer is 100 bytes larger than requested, fill with magic value */ for (i = 0; i < 100; i++) { buf[bufObj->Size - i - 1] = 123; } } #endif return bufObj->Pointer; } GLboolean GLAPIENTRY _mesa_UnmapBuffer(GLenum target) { GET_CURRENT_CONTEXT(ctx); struct gl_buffer_object *bufObj; GLboolean status = GL_TRUE; ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE); bufObj = get_buffer(ctx, "glUnmapBufferARB", target); if (!bufObj) return GL_FALSE; if (!_mesa_bufferobj_mapped(bufObj)) { _mesa_error(ctx, GL_INVALID_OPERATION, "glUnmapBufferARB"); return GL_FALSE; } #ifdef BOUNDS_CHECK if (bufObj->Access != GL_READ_ONLY_ARB) { GLubyte *buf = (GLubyte *) bufObj->Pointer; GLuint i; /* check that last 100 bytes are still = magic value */ for (i = 0; i < 100; i++) { GLuint pos = bufObj->Size - i - 1; if (buf[pos] != 123) { _mesa_warning(ctx, "Out of bounds buffer object write detected" " at position %d (value = %u)\n", pos, buf[pos]); } } } #endif #ifdef VBO_DEBUG if (bufObj->AccessFlags & GL_MAP_WRITE_BIT) { GLuint i, unchanged = 0; GLubyte *b = (GLubyte *) bufObj->Pointer; GLint pos = -1; /* check which bytes changed */ for (i = 0; i < bufObj->Size - 1; i++) { if (b[i] == (i & 0xff) && b[i+1] == ((i+1) & 0xff)) { unchanged++; if (pos == -1) pos = i; } } if (unchanged) { printf("glUnmapBufferARB(%u): %u of %ld unchanged, starting at %d\n", bufObj->Name, unchanged, bufObj->Size, pos); } } #endif status = ctx->Driver.UnmapBuffer( ctx, bufObj ); bufObj->AccessFlags = 0; ASSERT(bufObj->Pointer == NULL); ASSERT(bufObj->Offset == 0); ASSERT(bufObj->Length == 0); return status; } void GLAPIENTRY _mesa_GetBufferParameteriv(GLenum target, GLenum pname, GLint *params) { GET_CURRENT_CONTEXT(ctx); struct gl_buffer_object *bufObj; bufObj = get_buffer(ctx, "glGetBufferParameterivARB", target); if (!bufObj) return; switch (pname) { case GL_BUFFER_SIZE_ARB: *params = (GLint) bufObj->Size; return; case GL_BUFFER_USAGE_ARB: *params = bufObj->Usage; return; case GL_BUFFER_ACCESS_ARB: *params = simplified_access_mode(ctx, bufObj->AccessFlags); return; case GL_BUFFER_MAPPED_ARB: *params = _mesa_bufferobj_mapped(bufObj); return; case GL_BUFFER_ACCESS_FLAGS: if (!ctx->Extensions.ARB_map_buffer_range) goto invalid_pname; *params = bufObj->AccessFlags; return; case GL_BUFFER_MAP_OFFSET: if (!ctx->Extensions.ARB_map_buffer_range) goto invalid_pname; *params = (GLint) bufObj->Offset; return; case GL_BUFFER_MAP_LENGTH: if (!ctx->Extensions.ARB_map_buffer_range) goto invalid_pname; *params = (GLint) bufObj->Length; return; default: ; /* fall-through */ } invalid_pname: _mesa_error(ctx, GL_INVALID_ENUM, "glGetBufferParameterivARB(pname=%s)", _mesa_lookup_enum_by_nr(pname)); } /** * New in GL 3.2 * This is pretty much a duplicate of GetBufferParameteriv() but the * GL_BUFFER_SIZE_ARB attribute will be 64-bits on a 64-bit system. */ void GLAPIENTRY _mesa_GetBufferParameteri64v(GLenum target, GLenum pname, GLint64 *params) { GET_CURRENT_CONTEXT(ctx); struct gl_buffer_object *bufObj; bufObj = get_buffer(ctx, "glGetBufferParameteri64v", target); if (!bufObj) return; switch (pname) { case GL_BUFFER_SIZE_ARB: *params = bufObj->Size; return; case GL_BUFFER_USAGE_ARB: *params = bufObj->Usage; return; case GL_BUFFER_ACCESS_ARB: *params = simplified_access_mode(ctx, bufObj->AccessFlags); return; case GL_BUFFER_ACCESS_FLAGS: if (!ctx->Extensions.ARB_map_buffer_range) goto invalid_pname; *params = bufObj->AccessFlags; return; case GL_BUFFER_MAPPED_ARB: *params = _mesa_bufferobj_mapped(bufObj); return; case GL_BUFFER_MAP_OFFSET: if (!ctx->Extensions.ARB_map_buffer_range) goto invalid_pname; *params = bufObj->Offset; return; case GL_BUFFER_MAP_LENGTH: if (!ctx->Extensions.ARB_map_buffer_range) goto invalid_pname; *params = bufObj->Length; return; default: ; /* fall-through */ } invalid_pname: _mesa_error(ctx, GL_INVALID_ENUM, "glGetBufferParameteri64v(pname=%s)", _mesa_lookup_enum_by_nr(pname)); } void GLAPIENTRY _mesa_GetBufferPointerv(GLenum target, GLenum pname, GLvoid **params) { GET_CURRENT_CONTEXT(ctx); struct gl_buffer_object * bufObj; if (pname != GL_BUFFER_MAP_POINTER_ARB) { _mesa_error(ctx, GL_INVALID_ENUM, "glGetBufferPointervARB(pname)"); return; } bufObj = get_buffer(ctx, "glGetBufferPointervARB", target); if (!bufObj) return; *params = bufObj->Pointer; } void GLAPIENTRY _mesa_CopyBufferSubData(GLenum readTarget, GLenum writeTarget, GLintptr readOffset, GLintptr writeOffset, GLsizeiptr size) { GET_CURRENT_CONTEXT(ctx); struct gl_buffer_object *src, *dst; src = get_buffer(ctx, "glCopyBufferSubData", readTarget); if (!src) return; dst = get_buffer(ctx, "glCopyBufferSubData", writeTarget); if (!dst) return; if (_mesa_bufferobj_mapped(src)) { _mesa_error(ctx, GL_INVALID_OPERATION, "glCopyBufferSubData(readBuffer is mapped)"); return; } if (_mesa_bufferobj_mapped(dst)) { _mesa_error(ctx, GL_INVALID_OPERATION, "glCopyBufferSubData(writeBuffer is mapped)"); return; } if (readOffset < 0) { _mesa_error(ctx, GL_INVALID_VALUE, "glCopyBufferSubData(readOffset = %d)", (int) readOffset); return; } if (writeOffset < 0) { _mesa_error(ctx, GL_INVALID_VALUE, "glCopyBufferSubData(writeOffset = %d)", (int) writeOffset); return; } if (size < 0) { _mesa_error(ctx, GL_INVALID_VALUE, "glCopyBufferSubData(writeOffset = %d)", (int) size); return; } if (readOffset + size > src->Size) { _mesa_error(ctx, GL_INVALID_VALUE, "glCopyBufferSubData(readOffset + size = %d)", (int) (readOffset + size)); return; } if (writeOffset + size > dst->Size) { _mesa_error(ctx, GL_INVALID_VALUE, "glCopyBufferSubData(writeOffset + size = %d)", (int) (writeOffset + size)); return; } if (src == dst) { if (readOffset + size <= writeOffset) { /* OK */ } else if (writeOffset + size <= readOffset) { /* OK */ } else { /* overlapping src/dst is illegal */ _mesa_error(ctx, GL_INVALID_VALUE, "glCopyBufferSubData(overlapping src/dst)"); return; } } ctx->Driver.CopyBufferSubData(ctx, src, dst, readOffset, writeOffset, size); } /** * See GL_ARB_map_buffer_range spec */ void * GLAPIENTRY _mesa_MapBufferRange(GLenum target, GLintptr offset, GLsizeiptr length, GLbitfield access) { GET_CURRENT_CONTEXT(ctx); struct gl_buffer_object *bufObj; void *map; ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL); if (!ctx->Extensions.ARB_map_buffer_range) { _mesa_error(ctx, GL_INVALID_OPERATION, "glMapBufferRange(extension not supported)"); return NULL; } if (offset < 0) { _mesa_error(ctx, GL_INVALID_VALUE, "glMapBufferRange(offset = %ld)", (long)offset); return NULL; } if (length < 0) { _mesa_error(ctx, GL_INVALID_VALUE, "glMapBufferRange(length = %ld)", (long)length); return NULL; } /* Page 38 of the PDF of the OpenGL ES 3.0 spec says: * * "An INVALID_OPERATION error is generated for any of the following * conditions: * * * is zero." */ if (_mesa_is_gles(ctx) && length == 0) { _mesa_error(ctx, GL_INVALID_OPERATION, "glMapBufferRange(length = 0)"); return NULL; } if (access & ~(GL_MAP_READ_BIT | GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_RANGE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT | GL_MAP_FLUSH_EXPLICIT_BIT | GL_MAP_UNSYNCHRONIZED_BIT)) { /* generate an error if any undefind bit is set */ _mesa_error(ctx, GL_INVALID_VALUE, "glMapBufferRange(access)"); return NULL; } if ((access & (GL_MAP_READ_BIT | GL_MAP_WRITE_BIT)) == 0) { _mesa_error(ctx, GL_INVALID_OPERATION, "glMapBufferRange(access indicates neither read or write)"); return NULL; } if ((access & GL_MAP_READ_BIT) && (access & (GL_MAP_INVALIDATE_RANGE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT | GL_MAP_UNSYNCHRONIZED_BIT))) { _mesa_error(ctx, GL_INVALID_OPERATION, "glMapBufferRange(invalid access flags)"); return NULL; } if ((access & GL_MAP_FLUSH_EXPLICIT_BIT) && ((access & GL_MAP_WRITE_BIT) == 0)) { _mesa_error(ctx, GL_INVALID_OPERATION, "glMapBufferRange(invalid access flags)"); return NULL; } bufObj = get_buffer(ctx, "glMapBufferRange", target); if (!bufObj) return NULL; if (offset + length > bufObj->Size) { _mesa_error(ctx, GL_INVALID_VALUE, "glMapBufferRange(offset + length > size)"); return NULL; } if (_mesa_bufferobj_mapped(bufObj)) { _mesa_error(ctx, GL_INVALID_OPERATION, "glMapBufferRange(buffer already mapped)"); return NULL; } if (!bufObj->Size) { _mesa_error(ctx, GL_OUT_OF_MEMORY, "glMapBufferRange(buffer size = 0)"); return NULL; } /* Mapping zero bytes should return a non-null pointer. */ if (!length) { static long dummy = 0; bufObj->Pointer = &dummy; bufObj->Length = length; bufObj->Offset = offset; bufObj->AccessFlags = access; return bufObj->Pointer; } ASSERT(ctx->Driver.MapBufferRange); map = ctx->Driver.MapBufferRange(ctx, offset, length, access, bufObj); if (!map) { _mesa_error(ctx, GL_OUT_OF_MEMORY, "glMapBufferARB(map failed)"); } else { /* The driver callback should have set all these fields. * This is important because other modules (like VBO) might call * the driver function directly. */ ASSERT(bufObj->Pointer == map); ASSERT(bufObj->Length == length); ASSERT(bufObj->Offset == offset); ASSERT(bufObj->AccessFlags == access); } return map; } /** * See GL_ARB_map_buffer_range spec */ void GLAPIENTRY _mesa_FlushMappedBufferRange(GLenum target, GLintptr offset, GLsizeiptr length) { GET_CURRENT_CONTEXT(ctx); struct gl_buffer_object *bufObj; if (!ctx->Extensions.ARB_map_buffer_range) { _mesa_error(ctx, GL_INVALID_OPERATION, "glFlushMappedBufferRange(extension not supported)"); return; } if (offset < 0) { _mesa_error(ctx, GL_INVALID_VALUE, "glFlushMappedBufferRange(offset = %ld)", (long)offset); return; } if (length < 0) { _mesa_error(ctx, GL_INVALID_VALUE, "glFlushMappedBufferRange(length = %ld)", (long)length); return; } bufObj = get_buffer(ctx, "glFlushMappedBufferRange", target); if (!bufObj) return; if (!_mesa_bufferobj_mapped(bufObj)) { /* buffer is not mapped */ _mesa_error(ctx, GL_INVALID_OPERATION, "glFlushMappedBufferRange(buffer is not mapped)"); return; } if ((bufObj->AccessFlags & GL_MAP_FLUSH_EXPLICIT_BIT) == 0) { _mesa_error(ctx, GL_INVALID_OPERATION, "glFlushMappedBufferRange(GL_MAP_FLUSH_EXPLICIT_BIT not set)"); return; } if (offset + length > bufObj->Length) { _mesa_error(ctx, GL_INVALID_VALUE, "glFlushMappedBufferRange(offset %ld + length %ld > mapped length %ld)", (long)offset, (long)length, (long)bufObj->Length); return; } ASSERT(bufObj->AccessFlags & GL_MAP_WRITE_BIT); if (ctx->Driver.FlushMappedBufferRange) ctx->Driver.FlushMappedBufferRange(ctx, offset, length, bufObj); } static GLenum buffer_object_purgeable(struct gl_context *ctx, GLuint name, GLenum option) { struct gl_buffer_object *bufObj; GLenum retval; bufObj = _mesa_lookup_bufferobj(ctx, name); if (!bufObj) { _mesa_error(ctx, GL_INVALID_VALUE, "glObjectPurgeable(name = 0x%x)", name); return 0; } if (!_mesa_is_bufferobj(bufObj)) { _mesa_error(ctx, GL_INVALID_OPERATION, "glObjectPurgeable(buffer 0)" ); return 0; } if (bufObj->Purgeable) { _mesa_error(ctx, GL_INVALID_OPERATION, "glObjectPurgeable(name = 0x%x) is already purgeable", name); return GL_VOLATILE_APPLE; } bufObj->Purgeable = GL_TRUE; retval = GL_VOLATILE_APPLE; if (ctx->Driver.BufferObjectPurgeable) retval = ctx->Driver.BufferObjectPurgeable(ctx, bufObj, option); return retval; } static GLenum renderbuffer_purgeable(struct gl_context *ctx, GLuint name, GLenum option) { struct gl_renderbuffer *bufObj; GLenum retval; bufObj = _mesa_lookup_renderbuffer(ctx, name); if (!bufObj) { _mesa_error(ctx, GL_INVALID_VALUE, "glObjectUnpurgeable(name = 0x%x)", name); return 0; } if (bufObj->Purgeable) { _mesa_error(ctx, GL_INVALID_OPERATION, "glObjectPurgeable(name = 0x%x) is already purgeable", name); return GL_VOLATILE_APPLE; } bufObj->Purgeable = GL_TRUE; retval = GL_VOLATILE_APPLE; if (ctx->Driver.RenderObjectPurgeable) retval = ctx->Driver.RenderObjectPurgeable(ctx, bufObj, option); return retval; } static GLenum texture_object_purgeable(struct gl_context *ctx, GLuint name, GLenum option) { struct gl_texture_object *bufObj; GLenum retval; bufObj = _mesa_lookup_texture(ctx, name); if (!bufObj) { _mesa_error(ctx, GL_INVALID_VALUE, "glObjectPurgeable(name = 0x%x)", name); return 0; } if (bufObj->Purgeable) { _mesa_error(ctx, GL_INVALID_OPERATION, "glObjectPurgeable(name = 0x%x) is already purgeable", name); return GL_VOLATILE_APPLE; } bufObj->Purgeable = GL_TRUE; retval = GL_VOLATILE_APPLE; if (ctx->Driver.TextureObjectPurgeable) retval = ctx->Driver.TextureObjectPurgeable(ctx, bufObj, option); return retval; } GLenum GLAPIENTRY _mesa_ObjectPurgeableAPPLE(GLenum objectType, GLuint name, GLenum option) { GLenum retval; GET_CURRENT_CONTEXT(ctx); ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0); if (name == 0) { _mesa_error(ctx, GL_INVALID_VALUE, "glObjectPurgeable(name = 0x%x)", name); return 0; } switch (option) { case GL_VOLATILE_APPLE: case GL_RELEASED_APPLE: /* legal */ break; default: _mesa_error(ctx, GL_INVALID_ENUM, "glObjectPurgeable(name = 0x%x) invalid option: %d", name, option); return 0; } switch (objectType) { case GL_TEXTURE: retval = texture_object_purgeable(ctx, name, option); break; case GL_RENDERBUFFER_EXT: retval = renderbuffer_purgeable(ctx, name, option); break; case GL_BUFFER_OBJECT_APPLE: retval = buffer_object_purgeable(ctx, name, option); break; default: _mesa_error(ctx, GL_INVALID_ENUM, "glObjectPurgeable(name = 0x%x) invalid type: %d", name, objectType); return 0; } /* In strict conformance to the spec, we must only return VOLATILE when * when passed the VOLATILE option. Madness. * * XXX First fix the spec, then fix me. */ return option == GL_VOLATILE_APPLE ? GL_VOLATILE_APPLE : retval; } static GLenum buffer_object_unpurgeable(struct gl_context *ctx, GLuint name, GLenum option) { struct gl_buffer_object *bufObj; GLenum retval; bufObj = _mesa_lookup_bufferobj(ctx, name); if (!bufObj) { _mesa_error(ctx, GL_INVALID_VALUE, "glObjectUnpurgeable(name = 0x%x)", name); return 0; } if (! bufObj->Purgeable) { _mesa_error(ctx, GL_INVALID_OPERATION, "glObjectUnpurgeable(name = 0x%x) object is " " already \"unpurged\"", name); return 0; } bufObj->Purgeable = GL_FALSE; retval = option; if (ctx->Driver.BufferObjectUnpurgeable) retval = ctx->Driver.BufferObjectUnpurgeable(ctx, bufObj, option); return retval; } static GLenum renderbuffer_unpurgeable(struct gl_context *ctx, GLuint name, GLenum option) { struct gl_renderbuffer *bufObj; GLenum retval; bufObj = _mesa_lookup_renderbuffer(ctx, name); if (!bufObj) { _mesa_error(ctx, GL_INVALID_VALUE, "glObjectUnpurgeable(name = 0x%x)", name); return 0; } if (! bufObj->Purgeable) { _mesa_error(ctx, GL_INVALID_OPERATION, "glObjectUnpurgeable(name = 0x%x) object is " " already \"unpurged\"", name); return 0; } bufObj->Purgeable = GL_FALSE; retval = option; if (ctx->Driver.RenderObjectUnpurgeable) retval = ctx->Driver.RenderObjectUnpurgeable(ctx, bufObj, option); return retval; } static GLenum texture_object_unpurgeable(struct gl_context *ctx, GLuint name, GLenum option) { struct gl_texture_object *bufObj; GLenum retval; bufObj = _mesa_lookup_texture(ctx, name); if (!bufObj) { _mesa_error(ctx, GL_INVALID_VALUE, "glObjectUnpurgeable(name = 0x%x)", name); return 0; } if (! bufObj->Purgeable) { _mesa_error(ctx, GL_INVALID_OPERATION, "glObjectUnpurgeable(name = 0x%x) object is" " already \"unpurged\"", name); return 0; } bufObj->Purgeable = GL_FALSE; retval = option; if (ctx->Driver.TextureObjectUnpurgeable) retval = ctx->Driver.TextureObjectUnpurgeable(ctx, bufObj, option); return retval; } GLenum GLAPIENTRY _mesa_ObjectUnpurgeableAPPLE(GLenum objectType, GLuint name, GLenum option) { GET_CURRENT_CONTEXT(ctx); ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0); if (name == 0) { _mesa_error(ctx, GL_INVALID_VALUE, "glObjectUnpurgeable(name = 0x%x)", name); return 0; } switch (option) { case GL_RETAINED_APPLE: case GL_UNDEFINED_APPLE: /* legal */ break; default: _mesa_error(ctx, GL_INVALID_ENUM, "glObjectUnpurgeable(name = 0x%x) invalid option: %d", name, option); return 0; } switch (objectType) { case GL_BUFFER_OBJECT_APPLE: return buffer_object_unpurgeable(ctx, name, option); case GL_TEXTURE: return texture_object_unpurgeable(ctx, name, option); case GL_RENDERBUFFER_EXT: return renderbuffer_unpurgeable(ctx, name, option); default: _mesa_error(ctx, GL_INVALID_ENUM, "glObjectUnpurgeable(name = 0x%x) invalid type: %d", name, objectType); return 0; } } static void get_buffer_object_parameteriv(struct gl_context *ctx, GLuint name, GLenum pname, GLint *params) { struct gl_buffer_object *bufObj = _mesa_lookup_bufferobj(ctx, name); if (!bufObj) { _mesa_error(ctx, GL_INVALID_VALUE, "glGetObjectParameteriv(name = 0x%x) invalid object", name); return; } switch (pname) { case GL_PURGEABLE_APPLE: *params = bufObj->Purgeable; break; default: _mesa_error(ctx, GL_INVALID_ENUM, "glGetObjectParameteriv(name = 0x%x) invalid enum: %d", name, pname); break; } } static void get_renderbuffer_parameteriv(struct gl_context *ctx, GLuint name, GLenum pname, GLint *params) { struct gl_renderbuffer *rb = _mesa_lookup_renderbuffer(ctx, name); if (!rb) { _mesa_error(ctx, GL_INVALID_VALUE, "glObjectUnpurgeable(name = 0x%x)", name); return; } switch (pname) { case GL_PURGEABLE_APPLE: *params = rb->Purgeable; break; default: _mesa_error(ctx, GL_INVALID_ENUM, "glGetObjectParameteriv(name = 0x%x) invalid enum: %d", name, pname); break; } } static void get_texture_object_parameteriv(struct gl_context *ctx, GLuint name, GLenum pname, GLint *params) { struct gl_texture_object *texObj = _mesa_lookup_texture(ctx, name); if (!texObj) { _mesa_error(ctx, GL_INVALID_VALUE, "glObjectUnpurgeable(name = 0x%x)", name); return; } switch (pname) { case GL_PURGEABLE_APPLE: *params = texObj->Purgeable; break; default: _mesa_error(ctx, GL_INVALID_ENUM, "glGetObjectParameteriv(name = 0x%x) invalid enum: %d", name, pname); break; } } void GLAPIENTRY _mesa_GetObjectParameterivAPPLE(GLenum objectType, GLuint name, GLenum pname, GLint *params) { GET_CURRENT_CONTEXT(ctx); if (name == 0) { _mesa_error(ctx, GL_INVALID_VALUE, "glGetObjectParameteriv(name = 0x%x)", name); return; } switch (objectType) { case GL_TEXTURE: get_texture_object_parameteriv(ctx, name, pname, params); break; case GL_BUFFER_OBJECT_APPLE: get_buffer_object_parameteriv(ctx, name, pname, params); break; case GL_RENDERBUFFER_EXT: get_renderbuffer_parameteriv(ctx, name, pname, params); break; default: _mesa_error(ctx, GL_INVALID_ENUM, "glGetObjectParameteriv(name = 0x%x) invalid type: %d", name, objectType); } } static void set_ubo_binding(struct gl_context *ctx, int index, struct gl_buffer_object *bufObj, GLintptr offset, GLsizeiptr size, GLboolean autoSize) { struct gl_uniform_buffer_binding *binding; binding = &ctx->UniformBufferBindings[index]; if (binding->BufferObject == bufObj && binding->Offset == offset && binding->Size == size && binding->AutomaticSize == autoSize) { return; } FLUSH_VERTICES(ctx, 0); ctx->NewDriverState |= ctx->DriverFlags.NewUniformBuffer; _mesa_reference_buffer_object(ctx, &binding->BufferObject, bufObj); binding->Offset = offset; binding->Size = size; binding->AutomaticSize = autoSize; } /** * Bind a region of a buffer object to a uniform block binding point. * \param index the uniform buffer binding point index * \param bufObj the buffer object * \param offset offset to the start of buffer object region * \param size size of the buffer object region */ static void bind_buffer_range_uniform_buffer(struct gl_context *ctx, GLuint index, struct gl_buffer_object *bufObj, GLintptr offset, GLsizeiptr size) { if (index >= ctx->Const.MaxUniformBufferBindings) { _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferRange(index=%d)", index); return; } if (offset & (ctx->Const.UniformBufferOffsetAlignment - 1)) { _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferRange(offset misalgned %d/%d)", (int) offset, ctx->Const.UniformBufferOffsetAlignment); return; } if (bufObj == ctx->Shared->NullBufferObj) { offset = -1; size = -1; } _mesa_reference_buffer_object(ctx, &ctx->UniformBuffer, bufObj); set_ubo_binding(ctx, index, bufObj, offset, size, GL_FALSE); } /** * Bind a buffer object to a uniform block binding point. * As above, but offset = 0. */ static void bind_buffer_base_uniform_buffer(struct gl_context *ctx, GLuint index, struct gl_buffer_object *bufObj) { if (index >= ctx->Const.MaxUniformBufferBindings) { _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferBase(index=%d)", index); return; } _mesa_reference_buffer_object(ctx, &ctx->UniformBuffer, bufObj); if (bufObj == ctx->Shared->NullBufferObj) set_ubo_binding(ctx, index, bufObj, -1, -1, GL_TRUE); else set_ubo_binding(ctx, index, bufObj, 0, 0, GL_TRUE); } static void set_atomic_buffer_binding(struct gl_context *ctx, unsigned index, struct gl_buffer_object *bufObj, GLintptr offset, GLsizeiptr size, const char *name) { struct gl_atomic_buffer_binding *binding; if (index >= ctx->Const.MaxAtomicBufferBindings) { _mesa_error(ctx, GL_INVALID_VALUE, "%s(index=%d)", name, index); return; } if (offset & (ATOMIC_COUNTER_SIZE - 1)) { _mesa_error(ctx, GL_INVALID_VALUE, "%s(offset misalgned %d/%d)", name, (int) offset, ATOMIC_COUNTER_SIZE); return; } _mesa_reference_buffer_object(ctx, &ctx->AtomicBuffer, bufObj); binding = &ctx->AtomicBufferBindings[index]; if (binding->BufferObject == bufObj && binding->Offset == offset && binding->Size == size) { return; } FLUSH_VERTICES(ctx, 0); ctx->NewDriverState |= ctx->DriverFlags.NewAtomicBuffer; _mesa_reference_buffer_object(ctx, &binding->BufferObject, bufObj); if (bufObj == ctx->Shared->NullBufferObj) { binding->Offset = -1; binding->Size = -1; } else { binding->Offset = offset; binding->Size = size; } } void GLAPIENTRY _mesa_BindBufferRange(GLenum target, GLuint index, GLuint buffer, GLintptr offset, GLsizeiptr size) { GET_CURRENT_CONTEXT(ctx); struct gl_buffer_object *bufObj; if (buffer == 0) { bufObj = ctx->Shared->NullBufferObj; } else { bufObj = _mesa_lookup_bufferobj(ctx, buffer); } if (!_mesa_handle_bind_buffer_gen(ctx, target, buffer, &bufObj, "glBindBufferRange")) return; if (!bufObj) { _mesa_error(ctx, GL_INVALID_OPERATION, "glBindBufferRange(invalid buffer=%u)", buffer); return; } if (buffer != 0) { if (size <= 0) { _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferRange(size=%d)", (int) size); return; } } switch (target) { case GL_TRANSFORM_FEEDBACK_BUFFER: _mesa_bind_buffer_range_transform_feedback(ctx, index, bufObj, offset, size); return; case GL_UNIFORM_BUFFER: bind_buffer_range_uniform_buffer(ctx, index, bufObj, offset, size); return; case GL_ATOMIC_COUNTER_BUFFER: set_atomic_buffer_binding(ctx, index, bufObj, offset, size, "glBindBufferRange"); return; default: _mesa_error(ctx, GL_INVALID_ENUM, "glBindBufferRange(target)"); return; } } void GLAPIENTRY _mesa_BindBufferBase(GLenum target, GLuint index, GLuint buffer) { GET_CURRENT_CONTEXT(ctx); struct gl_buffer_object *bufObj; if (buffer == 0) { bufObj = ctx->Shared->NullBufferObj; } else { bufObj = _mesa_lookup_bufferobj(ctx, buffer); } if (!_mesa_handle_bind_buffer_gen(ctx, target, buffer, &bufObj, "glBindBufferBase")) return; if (!bufObj) { _mesa_error(ctx, GL_INVALID_OPERATION, "glBindBufferBase(invalid buffer=%u)", buffer); return; } /* Note that there's some oddness in the GL 3.1-GL 3.3 specifications with * regards to BindBufferBase. It says (GL 3.1 core spec, page 63): * * "BindBufferBase is equivalent to calling BindBufferRange with offset * zero and size equal to the size of buffer." * * but it says for glGetIntegeri_v (GL 3.1 core spec, page 230): * * "If the parameter (starting offset or size) was not specified when the * buffer object was bound, zero is returned." * * What happens if the size of the buffer changes? Does the size of the * buffer at the moment glBindBufferBase was called still play a role, like * the first quote would imply, or is the size meaningless in the * glBindBufferBase case like the second quote would suggest? The GL 4.1 * core spec page 45 says: * * "It is equivalent to calling BindBufferRange with offset zero, while * size is determined by the size of the bound buffer at the time the * binding is used." * * My interpretation is that the GL 4.1 spec was a clarification of the * behavior, not a change. In particular, this choice will only make * rendering work in cases where it would have had undefined results. */ switch (target) { case GL_TRANSFORM_FEEDBACK_BUFFER: _mesa_bind_buffer_base_transform_feedback(ctx, index, bufObj); return; case GL_UNIFORM_BUFFER: bind_buffer_base_uniform_buffer(ctx, index, bufObj); return; case GL_ATOMIC_COUNTER_BUFFER: set_atomic_buffer_binding(ctx, index, bufObj, 0, 0, "glBindBufferBase"); return; default: _mesa_error(ctx, GL_INVALID_ENUM, "glBindBufferBase(target)"); return; } } void GLAPIENTRY _mesa_InvalidateBufferSubData(GLuint buffer, GLintptr offset, GLsizeiptr length) { GET_CURRENT_CONTEXT(ctx); struct gl_buffer_object *bufObj; const GLintptr end = offset + length; bufObj = _mesa_lookup_bufferobj(ctx, buffer); if (!bufObj) { _mesa_error(ctx, GL_INVALID_VALUE, "glInvalidateBufferSubData(name = 0x%x) invalid object", buffer); return; } /* The GL_ARB_invalidate_subdata spec says: * * "An INVALID_VALUE error is generated if or is * negative, or if + is greater than the value of * BUFFER_SIZE." */ if (end < 0 || end > bufObj->Size) { _mesa_error(ctx, GL_INVALID_VALUE, "glInvalidateBufferSubData(invalid offset or length)"); return; } /* The GL_ARB_invalidate_subdata spec says: * * "An INVALID_OPERATION error is generated if the buffer is currently * mapped by MapBuffer, or if the invalidate range intersects the range * currently mapped by MapBufferRange." */ if (bufferobj_range_mapped(bufObj, offset, length)) { _mesa_error(ctx, GL_INVALID_OPERATION, "glInvalidateBufferSubData(intersection with mapped " "range)"); return; } /* We don't actually do anything for this yet. Just return after * validating the parameters and generating the required errors. */ return; } void GLAPIENTRY _mesa_InvalidateBufferData(GLuint buffer) { GET_CURRENT_CONTEXT(ctx); struct gl_buffer_object *bufObj; bufObj = _mesa_lookup_bufferobj(ctx, buffer); if (!bufObj) { _mesa_error(ctx, GL_INVALID_VALUE, "glInvalidateBufferData(name = 0x%x) invalid object", buffer); return; } /* The GL_ARB_invalidate_subdata spec says: * * "An INVALID_OPERATION error is generated if the buffer is currently * mapped by MapBuffer, or if the invalidate range intersects the range * currently mapped by MapBufferRange." */ if (_mesa_bufferobj_mapped(bufObj)) { _mesa_error(ctx, GL_INVALID_OPERATION, "glInvalidateBufferData(intersection with mapped " "range)"); return; } /* We don't actually do anything for this yet. Just return after * validating the parameters and generating the required errors. */ return; }