diff options
Diffstat (limited to 'src/gallium/drivers/r300/r300_transfer.c')
| -rw-r--r-- | src/gallium/drivers/r300/r300_transfer.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/src/gallium/drivers/r300/r300_transfer.c b/src/gallium/drivers/r300/r300_transfer.c new file mode 100644 index 00000000000..fa48688db28 --- /dev/null +++ b/src/gallium/drivers/r300/r300_transfer.c @@ -0,0 +1,101 @@ +/* + * Copyright 2008 Corbin Simpson <[email protected]> + * Copyright 2010 Marek Olšák <[email protected]> + * + * 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 + * on 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 + * THE AUTHOR(S) AND/OR THEIR 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 "r300_context.h" +#include "r300_transfer.h" +#include "r300_texture.h" +#include "r300_screen.h" + +#include "util/u_memory.h" +#include "util/u_format.h" + +static struct pipe_transfer* +r300_get_tex_transfer(struct pipe_screen *screen, + struct pipe_texture *texture, + unsigned face, unsigned level, unsigned zslice, + enum pipe_transfer_usage usage, unsigned x, unsigned y, + unsigned w, unsigned h) +{ + struct r300_texture *tex = (struct r300_texture *)texture; + struct r300_transfer *trans; + struct r300_screen *rscreen = r300_screen(screen); + unsigned offset; + + offset = r300_texture_get_offset(tex, level, zslice, face); /* in bytes */ + + trans = CALLOC_STRUCT(r300_transfer); + if (trans) { + pipe_texture_reference(&trans->transfer.texture, texture); + trans->transfer.x = x; + trans->transfer.y = y; + trans->transfer.width = w; + trans->transfer.height = h; + trans->transfer.stride = r300_texture_get_stride(rscreen, tex, level); + trans->transfer.usage = usage; + trans->transfer.zslice = zslice; + trans->transfer.face = face; + + trans->offset = offset; + } + return &trans->transfer; +} + +static void r300_tex_transfer_destroy(struct pipe_transfer *trans) +{ + pipe_texture_reference(&trans->texture, NULL); + FREE(trans); +} + +static void* r300_transfer_map(struct pipe_screen *screen, + struct pipe_transfer *transfer) +{ + struct r300_texture *tex = (struct r300_texture*)transfer->texture; + char *map; + enum pipe_format format = tex->tex.format; + + map = pipe_buffer_map(screen, tex->buffer, + pipe_transfer_buffer_flags(transfer)); + + if (!map) { + return NULL; + } + + return map + r300_transfer(transfer)->offset + + transfer->y / util_format_get_blockheight(format) * transfer->stride + + transfer->x / util_format_get_blockwidth(format) * util_format_get_blocksize(format); +} + +static void r300_transfer_unmap(struct pipe_screen *screen, + struct pipe_transfer *transfer) +{ + struct r300_texture *tex = (struct r300_texture*)transfer->texture; + pipe_buffer_unmap(screen, tex->buffer); +} + +void r300_init_screen_transfer_functions(struct pipe_screen *screen) +{ + screen->get_tex_transfer = r300_get_tex_transfer; + screen->tex_transfer_destroy = r300_tex_transfer_destroy; + screen->transfer_map = r300_transfer_map; + screen->transfer_unmap = r300_transfer_unmap; +} |