}
}
-
-/**
- * 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)
-{
- struct gl_buffer_object *obj = MALLOC_STRUCT(gl_buffer_object);
- if (!obj)
- return NULL;
-
- _mesa_initialize_buffer_object(ctx, obj, name);
- return obj;
-}
-
-
/**
* Delete a buffer object.
*
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
-buffer_data_fallback(struct gl_context *ctx, GLenum target, GLsizeiptrARB size,
- const GLvoid *data, GLenum usage, GLenum storageFlags,
- struct gl_buffer_object *bufObj)
-{
- void * new_data;
-
- (void) target;
-
- align_free( bufObj->Data );
-
- new_data = align_malloc( size, ctx->Const.MinMapBufferAlignment );
- if (new_data) {
- bufObj->Data = (GLubyte *) new_data;
- bufObj->Size = size;
- bufObj->Usage = usage;
- bufObj->StorageFlags = storageFlags;
-
- 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
-buffer_sub_data_fallback(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
-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 );
- }
-}
-
-
/**
* Clear a subrange of the buffer object with copies of the supplied data.
* If data is NULL the buffer is filled with zeros.
ctx->Driver.UnmapBuffer(ctx, bufObj, MAP_INTERNAL);
}
-
-/**
- * Default fallback for \c dd_function_table::MapBufferRange().
- * Called via glMapBufferRange().
- */
-static void *
-map_buffer_range_fallback(struct gl_context *ctx, GLintptr offset,
- GLsizeiptr length, GLbitfield access,
- struct gl_buffer_object *bufObj,
- gl_map_buffer_index index)
-{
- (void) ctx;
- assert(!_mesa_bufferobj_mapped(bufObj, index));
- /* Just return a direct pointer to the data */
- bufObj->Mappings[index].Pointer = bufObj->Data + offset;
- bufObj->Mappings[index].Length = length;
- bufObj->Mappings[index].Offset = offset;
- bufObj->Mappings[index].AccessFlags = access;
- return bufObj->Mappings[index].Pointer;
-}
-
-
-/**
- * Default fallback for \c dd_function_table::FlushMappedBufferRange().
- * Called via glFlushMappedBufferRange().
- */
-static void
-flush_mapped_buffer_range_fallback(struct gl_context *ctx,
- GLintptr offset, GLsizeiptr length,
- struct gl_buffer_object *obj,
- gl_map_buffer_index index)
-{
- (void) ctx;
- (void) offset;
- (void) length;
- (void) obj;
- (void) index;
- /* no-op */
-}
-
-
-/**
- * Default callback for \c dd_function_table::UnmapBuffer().
- *
- * The input parameters will have been already tested for errors.
- *
- * \sa glUnmapBufferARB, dd_function_table::UnmapBuffer
- */
-static GLboolean
-unmap_buffer_fallback(struct gl_context *ctx, struct gl_buffer_object *bufObj,
- gl_map_buffer_index index)
-{
- (void) ctx;
- /* XXX we might assert here that bufObj->Pointer is non-null */
- bufObj->Mappings[index].Pointer = NULL;
- bufObj->Mappings[index].Length = 0;
- bufObj->Mappings[index].Offset = 0;
- bufObj->Mappings[index].AccessFlags = 0x0;
- return GL_TRUE;
-}
-
-
-/**
- * Default fallback for \c dd_function_table::CopyBufferSubData().
- * Called via glCopyBufferSubData().
- */
-static void
-copy_buffer_sub_data_fallback(struct gl_context *ctx,
- struct gl_buffer_object *src,
- struct gl_buffer_object *dst,
- GLintptr readOffset, GLintptr writeOffset,
- GLsizeiptr size)
-{
- GLubyte *srcPtr, *dstPtr;
-
- if (src == dst) {
- srcPtr = dstPtr = ctx->Driver.MapBufferRange(ctx, 0, src->Size,
- GL_MAP_READ_BIT |
- GL_MAP_WRITE_BIT, src,
- MAP_INTERNAL);
-
- if (!srcPtr)
- return;
-
- srcPtr += readOffset;
- dstPtr += writeOffset;
- } else {
- srcPtr = ctx->Driver.MapBufferRange(ctx, readOffset, size,
- GL_MAP_READ_BIT, src,
- MAP_INTERNAL);
- dstPtr = ctx->Driver.MapBufferRange(ctx, writeOffset, size,
- (GL_MAP_WRITE_BIT |
- GL_MAP_INVALIDATE_RANGE_BIT), dst,
- MAP_INTERNAL);
- }
-
- /* 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, MAP_INTERNAL);
- if (dst != src)
- ctx->Driver.UnmapBuffer(ctx, dst, MAP_INTERNAL);
-}
-
-
-
/**
* Initialize the state associated with buffer objects
*/
}
}
-
-/**
- * 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->BufferData = buffer_data_fallback;
- driver->BufferSubData = buffer_sub_data_fallback;
- driver->GetBufferSubData = buffer_get_subdata;
- driver->UnmapBuffer = unmap_buffer_fallback;
-
- /* GL_ARB_clear_buffer_object */
- driver->ClearBufferSubData = _mesa_ClearBufferSubData_sw;
-
- /* GL_ARB_map_buffer_range */
- driver->MapBufferRange = map_buffer_range_fallback;
- driver->FlushMappedBufferRange = flush_mapped_buffer_range_fallback;
-
- /* GL_ARB_copy_buffer */
- driver->CopyBufferSubData = copy_buffer_sub_data_fallback;
-}
-
-
void
_mesa_buffer_unmap_all_mappings(struct gl_context *ctx,
struct gl_buffer_object *bufObj)
projects / platform / upstream / mesa.git / commitdiff