diff options
Diffstat (limited to 'src/mesa/state_tracker/st_cb_bufferobjects.c')
| -rw-r--r-- | src/mesa/state_tracker/st_cb_bufferobjects.c | 240 |
1 files changed, 240 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_cb_bufferobjects.c b/src/mesa/state_tracker/st_cb_bufferobjects.c new file mode 100644 index 0000000000..af79aefa96 --- /dev/null +++ b/src/mesa/state_tracker/st_cb_bufferobjects.c @@ -0,0 +1,240 @@ +/************************************************************************** + * + * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. + * 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, sub license, 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 (including the + * next paragraph) 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 NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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. + * + **************************************************************************/ + + +#include "main/imports.h" +#include "main/mtypes.h" +#include "main/bufferobj.h" + +#include "st_context.h" +#include "st_cb_bufferobjects.h" + +#include "pipe/p_context.h" +#include "pipe/p_defines.h" +#include "pipe/p_inlines.h" + + + +/* Pixel buffers and Vertex/index buffers are handled through these + * mesa callbacks. Framebuffer/Renderbuffer objects are + * created/managed elsewhere. + */ + + + +/** + * There is some duplication between mesa's bufferobjects and our + * bufmgr buffers. Both have an integer handle and a hashtable to + * lookup an opaque structure. It would be nice if the handles and + * internal structure where somehow shared. + */ +static struct gl_buffer_object * +st_bufferobj_alloc(GLcontext *ctx, GLuint name, GLenum target) +{ + struct st_buffer_object *st_obj = CALLOC_STRUCT(st_buffer_object); + + if (!st_obj) + return NULL; + + _mesa_initialize_buffer_object(&st_obj->Base, name, target); + + return &st_obj->Base; +} + + + +/** + * Deallocate/free a vertex/pixel buffer object. + * Called via glDeleteBuffersARB(). + */ +static void +st_bufferobj_free(GLcontext *ctx, struct gl_buffer_object *obj) +{ + struct pipe_context *pipe = st_context(ctx)->pipe; + struct st_buffer_object *st_obj = st_buffer_object(obj); + + if (st_obj->buffer) + pipe_reference_buffer(pipe, &st_obj->buffer, NULL); + + free(st_obj); +} + + + +/** + * Replace data in a subrange of buffer object. If the data range + * specified by size + offset extends beyond the end of the buffer or + * if data is NULL, no copy is performed. + * Called via glBufferSubDataARB(). + */ +static void +st_bufferobj_subdata(GLcontext *ctx, + GLenum target, + GLintptrARB offset, + GLsizeiptrARB size, + const GLvoid * data, struct gl_buffer_object *obj) +{ + struct pipe_context *pipe = st_context(ctx)->pipe; + struct st_buffer_object *st_obj = st_buffer_object(obj); + char *map; + + if (offset >= st_obj->size || size > (st_obj->size - offset)) + return; + + map = pipe_buffer_map(pipe, st_obj->buffer, PIPE_BUFFER_USAGE_CPU_WRITE); + memcpy(map + offset, data, size); + pipe_buffer_unmap(pipe, st_obj->buffer); +} + + +/** + * Called via glGetBufferSubDataARB(). + */ +static void +st_bufferobj_get_subdata(GLcontext *ctx, + GLenum target, + GLintptrARB offset, + GLsizeiptrARB size, + GLvoid * data, struct gl_buffer_object *obj) +{ + struct pipe_context *pipe = st_context(ctx)->pipe; + struct st_buffer_object *st_obj = st_buffer_object(obj); + char *map; + + if (offset >= st_obj->size || size > (st_obj->size - offset)) + return; + + map = pipe_buffer_map(pipe, st_obj->buffer, PIPE_BUFFER_USAGE_CPU_READ); + memcpy(data, map + offset, size); + pipe_buffer_unmap(pipe, st_obj->buffer); +} + + +/** + * Allocate space for and store data in a buffer object. Any data that was + * previously stored in the buffer object is lost. If data is NULL, + * memory will be allocated, but no copy will occur. + * Called via glBufferDataARB(). + */ +static void +st_bufferobj_data(GLcontext *ctx, + GLenum target, + GLsizeiptrARB size, + const GLvoid * data, + GLenum usage, + struct gl_buffer_object *obj) +{ + struct st_context *st = st_context(ctx); + struct pipe_context *pipe = st->pipe; + struct st_buffer_object *st_obj = st_buffer_object(obj); + unsigned buffer_usage; + + st_obj->Base.Size = size; + st_obj->Base.Usage = usage; + + switch(target) { + case GL_PIXEL_PACK_BUFFER_ARB: + case GL_PIXEL_UNPACK_BUFFER_ARB: + buffer_usage = PIPE_BUFFER_USAGE_PIXEL; + break; + case GL_ARRAY_BUFFER_ARB: + buffer_usage = PIPE_BUFFER_USAGE_VERTEX; + break; + case GL_ELEMENT_ARRAY_BUFFER_ARB: + buffer_usage = PIPE_BUFFER_USAGE_INDEX; + break; + default: + buffer_usage = 0; + } + + pipe_reference_buffer( pipe, &st_obj->buffer, NULL ); + + st_obj->buffer = pipe_buffer_create( pipe, 32, buffer_usage, size ); + + st_obj->size = size; + + if (data) + st_bufferobj_subdata(ctx, target, 0, size, data, obj); +} + + +/** + * Called via glMapBufferARB(). + */ +static void * +st_bufferobj_map(GLcontext *ctx, GLenum target, GLenum access, + struct gl_buffer_object *obj) +{ + struct pipe_context *pipe = st_context(ctx)->pipe; + struct st_buffer_object *st_obj = st_buffer_object(obj); + GLuint flags; + + switch (access) { + case GL_WRITE_ONLY: + flags = PIPE_BUFFER_USAGE_CPU_WRITE; + break; + case GL_READ_ONLY: + flags = PIPE_BUFFER_USAGE_CPU_READ; + break; + case GL_READ_WRITE: + /* fall-through */ + default: + flags = PIPE_BUFFER_USAGE_CPU_READ | PIPE_BUFFER_USAGE_CPU_WRITE; + break; + } + + obj->Pointer = pipe_buffer_map(pipe, st_obj->buffer, flags); + return obj->Pointer; +} + + +/** + * Called via glMapBufferARB(). + */ +static GLboolean +st_bufferobj_unmap(GLcontext *ctx, GLenum target, struct gl_buffer_object *obj) +{ + struct pipe_context *pipe = st_context(ctx)->pipe; + struct st_buffer_object *st_obj = st_buffer_object(obj); + + pipe_buffer_unmap(pipe, st_obj->buffer); + obj->Pointer = NULL; + return GL_TRUE; +} + + +void +st_init_bufferobject_functions(struct dd_function_table *functions) +{ + functions->NewBufferObject = st_bufferobj_alloc; + functions->DeleteBuffer = st_bufferobj_free; + functions->BufferData = st_bufferobj_data; + functions->BufferSubData = st_bufferobj_subdata; + functions->GetBufferSubData = st_bufferobj_get_subdata; + functions->MapBuffer = st_bufferobj_map; + functions->UnmapBuffer = st_bufferobj_unmap; +} |