| /************************************************************************** |
| * |
| * Copyright 2003 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 "imports.h" |
| #include "mtypes.h" |
| #include "bufferobj.h" |
| |
| #include "intel_context.h" |
| #include "intel_buffer_objects.h" |
| #include "intel_regions.h" |
| #include "dri_bufmgr.h" |
| |
| static GLboolean intel_bufferobj_unmap(GLcontext * ctx, |
| GLenum target, |
| struct gl_buffer_object *obj); |
| |
| /** Allocates a new dri_bo to store the data for the buffer object. */ |
| static void |
| intel_bufferobj_alloc_buffer(struct intel_context *intel, |
| struct intel_buffer_object *intel_obj) |
| { |
| intel_obj->buffer = dri_bo_alloc(intel->bufmgr, "bufferobj", |
| intel_obj->Base.Size, 64, |
| DRM_BO_FLAG_MEM_LOCAL | DRM_BO_FLAG_CACHED | DRM_BO_FLAG_CACHED_MAPPED); |
| } |
| |
| /** |
| * 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 * |
| intel_bufferobj_alloc(GLcontext * ctx, GLuint name, GLenum target) |
| { |
| struct intel_buffer_object *obj = CALLOC_STRUCT(intel_buffer_object); |
| |
| _mesa_initialize_buffer_object(&obj->Base, name, target); |
| |
| obj->buffer = NULL; |
| |
| return &obj->Base; |
| } |
| |
| /* Break the COW tie to the region. The region gets to keep the data. |
| */ |
| void |
| intel_bufferobj_release_region(struct intel_context *intel, |
| struct intel_buffer_object *intel_obj) |
| { |
| assert(intel_obj->region->buffer == intel_obj->buffer); |
| intel_obj->region->pbo = NULL; |
| intel_obj->region = NULL; |
| |
| dri_bo_unreference(intel_obj->buffer); |
| intel_obj->buffer = NULL; |
| } |
| |
| /* Break the COW tie to the region. Both the pbo and the region end |
| * up with a copy of the data. |
| */ |
| void |
| intel_bufferobj_cow(struct intel_context *intel, |
| struct intel_buffer_object *intel_obj) |
| { |
| assert(intel_obj->region); |
| intel_region_cow(intel, intel_obj->region); |
| } |
| |
| |
| /** |
| * Deallocate/free a vertex/pixel buffer object. |
| * Called via glDeleteBuffersARB(). |
| */ |
| static void |
| intel_bufferobj_free(GLcontext * ctx, struct gl_buffer_object *obj) |
| { |
| struct intel_context *intel = intel_context(ctx); |
| struct intel_buffer_object *intel_obj = intel_buffer_object(obj); |
| |
| assert(intel_obj); |
| |
| /* Buffer objects are automatically unmapped when deleting according |
| * to the spec. |
| */ |
| if (obj->Pointer) |
| intel_bufferobj_unmap(ctx, 0, obj); |
| |
| if (intel_obj->region) { |
| intel_bufferobj_release_region(intel, intel_obj); |
| } |
| else if (intel_obj->buffer) { |
| dri_bo_unreference(intel_obj->buffer); |
| } |
| |
| _mesa_free(intel_obj); |
| } |
| |
| |
| |
| /** |
| * 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 |
| intel_bufferobj_data(GLcontext * ctx, |
| GLenum target, |
| GLsizeiptrARB size, |
| const GLvoid * data, |
| GLenum usage, struct gl_buffer_object *obj) |
| { |
| struct intel_context *intel = intel_context(ctx); |
| struct intel_buffer_object *intel_obj = intel_buffer_object(obj); |
| |
| intel_obj->Base.Size = size; |
| intel_obj->Base.Usage = usage; |
| |
| /* Buffer objects are automatically unmapped when creating new data buffers |
| * according to the spec. |
| */ |
| if (obj->Pointer) |
| intel_bufferobj_unmap(ctx, 0, obj); |
| |
| if (intel_obj->region) |
| intel_bufferobj_release_region(intel, intel_obj); |
| |
| if (intel_obj->buffer != NULL) { |
| dri_bo_unreference(intel_obj->buffer); |
| intel_obj->buffer = NULL; |
| } |
| if (size != 0) { |
| intel_bufferobj_alloc_buffer(intel, intel_obj); |
| |
| if (data != NULL) |
| dri_bo_subdata(intel_obj->buffer, 0, size, data); |
| } |
| } |
| |
| |
| /** |
| * 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 |
| intel_bufferobj_subdata(GLcontext * ctx, |
| GLenum target, |
| GLintptrARB offset, |
| GLsizeiptrARB size, |
| const GLvoid * data, struct gl_buffer_object *obj) |
| { |
| struct intel_context *intel = intel_context(ctx); |
| struct intel_buffer_object *intel_obj = intel_buffer_object(obj); |
| |
| assert(intel_obj); |
| |
| if (intel_obj->region) |
| intel_bufferobj_cow(intel, intel_obj); |
| |
| dri_bo_subdata(intel_obj->buffer, offset, size, data); |
| } |
| |
| |
| /** |
| * Called via glGetBufferSubDataARB(). |
| */ |
| static void |
| intel_bufferobj_get_subdata(GLcontext * ctx, |
| GLenum target, |
| GLintptrARB offset, |
| GLsizeiptrARB size, |
| GLvoid * data, struct gl_buffer_object *obj) |
| { |
| struct intel_buffer_object *intel_obj = intel_buffer_object(obj); |
| |
| assert(intel_obj); |
| dri_bo_get_subdata(intel_obj->buffer, offset, size, data); |
| } |
| |
| |
| |
| /** |
| * Called via glMapBufferARB(). |
| */ |
| static void * |
| intel_bufferobj_map(GLcontext * ctx, |
| GLenum target, |
| GLenum access, struct gl_buffer_object *obj) |
| { |
| struct intel_context *intel = intel_context(ctx); |
| struct intel_buffer_object *intel_obj = intel_buffer_object(obj); |
| |
| /* XXX: Translate access to flags arg below: |
| */ |
| assert(intel_obj); |
| |
| if (intel_obj->region) |
| intel_bufferobj_cow(intel, intel_obj); |
| |
| if (intel_obj->buffer == NULL) { |
| obj->Pointer = NULL; |
| return NULL; |
| } |
| |
| dri_bo_map(intel_obj->buffer, GL_TRUE); |
| obj->Pointer = intel_obj->buffer->virtual; |
| return obj->Pointer; |
| } |
| |
| |
| /** |
| * Called via glMapBufferARB(). |
| */ |
| static GLboolean |
| intel_bufferobj_unmap(GLcontext * ctx, |
| GLenum target, struct gl_buffer_object *obj) |
| { |
| struct intel_buffer_object *intel_obj = intel_buffer_object(obj); |
| |
| assert(intel_obj); |
| if (intel_obj->buffer != NULL) { |
| assert(obj->Pointer); |
| dri_bo_unmap(intel_obj->buffer); |
| obj->Pointer = NULL; |
| } |
| return GL_TRUE; |
| } |
| |
| dri_bo * |
| intel_bufferobj_buffer(struct intel_context *intel, |
| struct intel_buffer_object *intel_obj, GLuint flag) |
| { |
| if (intel_obj->region) { |
| if (flag == INTEL_WRITE_PART) |
| intel_bufferobj_cow(intel, intel_obj); |
| else if (flag == INTEL_WRITE_FULL) { |
| intel_bufferobj_release_region(intel, intel_obj); |
| intel_bufferobj_alloc_buffer(intel, intel_obj); |
| } |
| } |
| |
| return intel_obj->buffer; |
| } |
| |
| void |
| intel_bufferobj_init(struct intel_context *intel) |
| { |
| GLcontext *ctx = &intel->ctx; |
| |
| ctx->Driver.NewBufferObject = intel_bufferobj_alloc; |
| ctx->Driver.DeleteBuffer = intel_bufferobj_free; |
| ctx->Driver.BufferData = intel_bufferobj_data; |
| ctx->Driver.BufferSubData = intel_bufferobj_subdata; |
| ctx->Driver.GetBufferSubData = intel_bufferobj_get_subdata; |
| ctx->Driver.MapBuffer = intel_bufferobj_map; |
| ctx->Driver.UnmapBuffer = intel_bufferobj_unmap; |
| } |