| /************************************************************************** |
| * |
| * Copyright 2008 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. |
| * |
| **************************************************************************/ |
| |
| /** |
| * Totally software-based winsys layer. |
| * Note that the one winsys function that we can't implement here |
| * is flush_frontbuffer(). |
| * Whoever uses this code will have to provide that. |
| * |
| * Authors: Brian Paul |
| */ |
| |
| |
| #include "pipe/internal/p_winsys_screen.h" |
| #include "pipe/p_state.h" |
| #include "pipe/p_inlines.h" |
| #include "util/u_format.h" |
| #include "util/u_math.h" |
| #include "util/u_memory.h" |
| |
| #include "sw_winsys.h" |
| |
| |
| |
| /** Subclass of pipe_winsys */ |
| struct sw_pipe_winsys |
| { |
| struct pipe_winsys Base; |
| /* no extra fields for now */ |
| }; |
| |
| |
| /** subclass of pipe_buffer */ |
| struct sw_pipe_buffer |
| { |
| struct pipe_buffer Base; |
| boolean UserBuffer; /** Is this a user-space buffer? */ |
| void *Data; |
| void *Mapped; |
| }; |
| |
| |
| /** cast wrapper */ |
| static INLINE struct sw_pipe_buffer * |
| sw_pipe_buffer(struct pipe_buffer *b) |
| { |
| return (struct sw_pipe_buffer *) b; |
| } |
| |
| |
| static const char * |
| get_name(struct pipe_winsys *pws) |
| { |
| return "software"; |
| } |
| |
| |
| /** Create new pipe_buffer and allocate storage of given size */ |
| static struct pipe_buffer * |
| buffer_create(struct pipe_winsys *pws, |
| unsigned alignment, |
| unsigned usage, |
| unsigned size) |
| { |
| struct sw_pipe_buffer *buffer = CALLOC_STRUCT(sw_pipe_buffer); |
| if (!buffer) |
| return NULL; |
| |
| pipe_reference_init(&buffer->Base.reference, 1); |
| buffer->Base.alignment = alignment; |
| buffer->Base.usage = usage; |
| buffer->Base.size = size; |
| |
| /* align to 16-byte multiple for Cell */ |
| buffer->Data = align_malloc(size, MAX2(alignment, 16)); |
| |
| return &buffer->Base; |
| } |
| |
| |
| /** |
| * Create buffer which wraps user-space data. |
| */ |
| static struct pipe_buffer * |
| user_buffer_create(struct pipe_winsys *pws, void *ptr, unsigned bytes) |
| { |
| struct sw_pipe_buffer *buffer = CALLOC_STRUCT(sw_pipe_buffer); |
| if (!buffer) |
| return NULL; |
| |
| pipe_reference_init(&buffer->Base.reference, 1); |
| buffer->Base.size = bytes; |
| buffer->UserBuffer = TRUE; |
| buffer->Data = ptr; |
| |
| return &buffer->Base; |
| } |
| |
| |
| static void * |
| buffer_map(struct pipe_winsys *pws, struct pipe_buffer *buf, unsigned flags) |
| { |
| struct sw_pipe_buffer *buffer = sw_pipe_buffer(buf); |
| buffer->Mapped = buffer->Data; |
| return buffer->Mapped; |
| } |
| |
| |
| static void |
| buffer_unmap(struct pipe_winsys *pws, struct pipe_buffer *buf) |
| { |
| struct sw_pipe_buffer *buffer = sw_pipe_buffer(buf); |
| buffer->Mapped = NULL; |
| } |
| |
| |
| static void |
| buffer_destroy(struct pipe_buffer *buf) |
| { |
| struct sw_pipe_buffer *buffer = sw_pipe_buffer(buf); |
| |
| if (buffer->Data && !buffer->UserBuffer) { |
| align_free(buffer->Data); |
| buffer->Data = NULL; |
| } |
| |
| free(buffer); |
| } |
| |
| |
| static struct pipe_buffer * |
| surface_buffer_create(struct pipe_winsys *winsys, |
| unsigned width, unsigned height, |
| enum pipe_format format, |
| unsigned usage, |
| unsigned tex_usage, |
| unsigned *stride) |
| { |
| const unsigned alignment = 64; |
| unsigned nblocksy; |
| |
| nblocksy = util_format_get_nblocksy(format, height); |
| *stride = align(util_format_get_stride(format, width), alignment); |
| |
| return winsys->buffer_create(winsys, alignment, |
| usage, |
| *stride * nblocksy); |
| } |
| |
| |
| static void |
| fence_reference(struct pipe_winsys *sws, struct pipe_fence_handle **ptr, |
| struct pipe_fence_handle *fence) |
| { |
| /* no-op */ |
| } |
| |
| |
| static int |
| fence_signalled(struct pipe_winsys *sws, struct pipe_fence_handle *fence, |
| unsigned flag) |
| { |
| /* no-op */ |
| return 0; |
| } |
| |
| |
| static int |
| fence_finish(struct pipe_winsys *sws, struct pipe_fence_handle *fence, |
| unsigned flag) |
| { |
| /* no-op */ |
| return 0; |
| } |
| |
| |
| /** |
| * Create/return a new pipe_winsys object. |
| */ |
| struct pipe_winsys * |
| create_sw_winsys(void) |
| { |
| struct sw_pipe_winsys *ws = CALLOC_STRUCT(sw_pipe_winsys); |
| if (!ws) |
| return NULL; |
| |
| /* Fill in this struct with callbacks that pipe will need to |
| * communicate with the window system, buffer manager, etc. |
| */ |
| ws->Base.buffer_create = buffer_create; |
| ws->Base.user_buffer_create = user_buffer_create; |
| ws->Base.buffer_map = buffer_map; |
| ws->Base.buffer_unmap = buffer_unmap; |
| ws->Base.buffer_destroy = buffer_destroy; |
| |
| ws->Base.surface_buffer_create = surface_buffer_create; |
| |
| ws->Base.fence_reference = fence_reference; |
| ws->Base.fence_signalled = fence_signalled; |
| ws->Base.fence_finish = fence_finish; |
| |
| ws->Base.flush_frontbuffer = NULL; /* not implemented here! */ |
| |
| ws->Base.get_name = get_name; |
| |
| return &ws->Base; |
| } |