313 lines
8.5 KiB
C
313 lines
8.5 KiB
C
/**************************************************************************
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*
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* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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#include "main/imports.h"
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#include "main/mtypes.h"
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#include "main/bufferobj.h"
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#include "st_inlines.h"
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#include "st_context.h"
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#include "st_cb_bufferobjects.h"
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#include "pipe/p_context.h"
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#include "pipe/p_defines.h"
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#include "pipe/p_inlines.h"
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/* Pixel buffers and Vertex/index buffers are handled through these
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* mesa callbacks. Framebuffer/Renderbuffer objects are
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* created/managed elsewhere.
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*/
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/**
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* There is some duplication between mesa's bufferobjects and our
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* bufmgr buffers. Both have an integer handle and a hashtable to
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* lookup an opaque structure. It would be nice if the handles and
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* internal structure where somehow shared.
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*/
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static struct gl_buffer_object *
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st_bufferobj_alloc(GLcontext *ctx, GLuint name, GLenum target)
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{
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struct st_buffer_object *st_obj = ST_CALLOC_STRUCT(st_buffer_object);
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if (!st_obj)
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return NULL;
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_mesa_initialize_buffer_object(&st_obj->Base, name, target);
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return &st_obj->Base;
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}
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/**
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* Deallocate/free a vertex/pixel buffer object.
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* Called via glDeleteBuffersARB().
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*/
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static void
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st_bufferobj_free(GLcontext *ctx, struct gl_buffer_object *obj)
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{
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struct st_buffer_object *st_obj = st_buffer_object(obj);
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if (st_obj->buffer)
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pipe_buffer_reference(&st_obj->buffer, NULL);
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_mesa_free(st_obj);
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}
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/**
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* Replace data in a subrange of buffer object. If the data range
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* specified by size + offset extends beyond the end of the buffer or
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* if data is NULL, no copy is performed.
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* Called via glBufferSubDataARB().
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*/
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static void
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st_bufferobj_subdata(GLcontext *ctx,
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GLenum target,
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GLintptrARB offset,
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GLsizeiptrARB size,
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const GLvoid * data, struct gl_buffer_object *obj)
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{
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struct st_buffer_object *st_obj = st_buffer_object(obj);
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if (offset >= st_obj->size || size > (st_obj->size - offset))
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return;
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st_cond_flush_pipe_buffer_write(st_context(ctx), st_obj->buffer,
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offset, size, data);
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}
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/**
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* Called via glGetBufferSubDataARB().
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*/
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static void
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st_bufferobj_get_subdata(GLcontext *ctx,
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GLenum target,
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GLintptrARB offset,
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GLsizeiptrARB size,
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GLvoid * data, struct gl_buffer_object *obj)
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{
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struct st_buffer_object *st_obj = st_buffer_object(obj);
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if (offset >= st_obj->size || size > (st_obj->size - offset))
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return;
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st_cond_flush_pipe_buffer_read(st_context(ctx), st_obj->buffer,
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offset, size, data);
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}
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/**
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* Allocate space for and store data in a buffer object. Any data that was
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* previously stored in the buffer object is lost. If data is NULL,
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* memory will be allocated, but no copy will occur.
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* Called via glBufferDataARB().
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*/
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static void
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st_bufferobj_data(GLcontext *ctx,
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GLenum target,
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GLsizeiptrARB size,
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const GLvoid * data,
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GLenum usage,
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struct gl_buffer_object *obj)
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{
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struct st_context *st = st_context(ctx);
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struct pipe_context *pipe = st->pipe;
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struct st_buffer_object *st_obj = st_buffer_object(obj);
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unsigned buffer_usage;
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st_obj->Base.Size = size;
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st_obj->Base.Usage = usage;
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switch(target) {
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case GL_PIXEL_PACK_BUFFER_ARB:
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case GL_PIXEL_UNPACK_BUFFER_ARB:
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buffer_usage = PIPE_BUFFER_USAGE_PIXEL;
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break;
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case GL_ARRAY_BUFFER_ARB:
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buffer_usage = PIPE_BUFFER_USAGE_VERTEX;
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break;
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case GL_ELEMENT_ARRAY_BUFFER_ARB:
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buffer_usage = PIPE_BUFFER_USAGE_INDEX;
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break;
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default:
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buffer_usage = 0;
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}
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pipe_buffer_reference( &st_obj->buffer, NULL );
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st_obj->buffer = pipe_buffer_create( pipe->screen, 32, buffer_usage, size );
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if (!st_obj->buffer) {
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_mesa_error(ctx, GL_OUT_OF_MEMORY, "glBufferDataARB");
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return;
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}
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st_obj->size = size;
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if (data)
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st_no_flush_pipe_buffer_write(st_context(ctx), st_obj->buffer, 0,
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size, data);
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}
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/**
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* Called via glMapBufferARB().
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*/
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static void *
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st_bufferobj_map(GLcontext *ctx, GLenum target, GLenum access,
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struct gl_buffer_object *obj)
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{
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struct st_buffer_object *st_obj = st_buffer_object(obj);
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GLuint flags;
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switch (access) {
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case GL_WRITE_ONLY:
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flags = PIPE_BUFFER_USAGE_CPU_WRITE;
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break;
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case GL_READ_ONLY:
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flags = PIPE_BUFFER_USAGE_CPU_READ;
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break;
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case GL_READ_WRITE:
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/* fall-through */
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default:
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flags = PIPE_BUFFER_USAGE_CPU_READ | PIPE_BUFFER_USAGE_CPU_WRITE;
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break;
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}
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obj->Pointer = st_cond_flush_pipe_buffer_map(st_context(ctx),
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st_obj->buffer,
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flags);
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if(obj->Pointer) {
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obj->Offset = 0;
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obj->Length = obj->Size;
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}
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return obj->Pointer;
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}
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/**
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* Called via glMapBufferRange().
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*/
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static void *
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st_bufferobj_map_range(GLcontext *ctx, GLenum target,
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GLintptr offset, GLsizeiptr length, GLbitfield access,
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struct gl_buffer_object *obj)
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{
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struct pipe_context *pipe = st_context(ctx)->pipe;
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struct st_buffer_object *st_obj = st_buffer_object(obj);
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GLuint flags = 0;
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char *map;
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if (access & GL_MAP_WRITE_BIT)
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flags |= PIPE_BUFFER_USAGE_CPU_WRITE;
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if (access & GL_MAP_READ_BIT)
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flags |= PIPE_BUFFER_USAGE_CPU_READ;
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if (access & GL_MAP_FLUSH_EXPLICIT_BIT)
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flags |= PIPE_BUFFER_USAGE_FLUSH_EXPLICIT;
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/* ... other flags ...
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*/
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if (access & MESA_MAP_NOWAIT_BIT)
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flags |= PIPE_BUFFER_USAGE_DONTBLOCK;
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assert(offset >= 0);
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assert(length >= 0);
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assert(offset < obj->Size);
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assert(offset + length <= obj->Size);
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map = obj->Pointer = pipe_buffer_map_range(pipe->screen, st_obj->buffer, offset, length, flags);
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if(obj->Pointer) {
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obj->Offset = offset;
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obj->Length = length;
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map += offset;
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}
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return map;
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}
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static void
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st_bufferobj_flush_mapped_range(GLcontext *ctx, GLenum target,
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GLintptr offset, GLsizeiptr length,
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struct gl_buffer_object *obj)
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{
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struct pipe_context *pipe = st_context(ctx)->pipe;
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struct st_buffer_object *st_obj = st_buffer_object(obj);
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/* Subrange is relative to mapped range */
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assert(offset >= 0);
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assert(length >= 0);
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assert(offset + length <= obj->Length);
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pipe_buffer_flush_mapped_range(pipe->screen, st_obj->buffer,
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obj->Offset + offset, length);
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}
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/**
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* Called via glUnmapBufferARB().
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*/
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static GLboolean
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st_bufferobj_unmap(GLcontext *ctx, GLenum target, struct gl_buffer_object *obj)
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{
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struct pipe_context *pipe = st_context(ctx)->pipe;
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struct st_buffer_object *st_obj = st_buffer_object(obj);
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pipe_buffer_unmap(pipe->screen, st_obj->buffer);
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obj->Pointer = NULL;
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obj->Offset = 0;
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obj->Length = 0;
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return GL_TRUE;
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}
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void
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st_init_bufferobject_functions(struct dd_function_table *functions)
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{
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functions->NewBufferObject = st_bufferobj_alloc;
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functions->DeleteBuffer = st_bufferobj_free;
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functions->BufferData = st_bufferobj_data;
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functions->BufferSubData = st_bufferobj_subdata;
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functions->GetBufferSubData = st_bufferobj_get_subdata;
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functions->MapBuffer = st_bufferobj_map;
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functions->MapBufferRange = st_bufferobj_map_range;
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functions->FlushMappedBufferRange = st_bufferobj_flush_mapped_range;
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functions->UnmapBuffer = st_bufferobj_unmap;
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}
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