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* Mesa 3-D graphics library
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* Copyright (C) 2010 LunarG Inc.
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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 "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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* Chia-I Wu <olv@lunarg.com>
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#include <sys/ioctl.h>
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#include "pipe/p_compiler.h"
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#include "util/u_format.h"
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#include "util/u_math.h"
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#include "util/u_memory.h"
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#include "state_tracker/sw_winsys.h"
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#include "fbdev_sw_winsys.h"
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struct fbdev_sw_displaytarget
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enum pipe_format format;
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struct fbdev_sw_winsys
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struct sw_winsys base;
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enum pipe_format format;
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struct fb_fix_screeninfo finfo;
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static INLINE struct fbdev_sw_displaytarget *
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fbdev_sw_displaytarget(struct sw_displaytarget *dt)
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return (struct fbdev_sw_displaytarget *) dt;
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static INLINE struct fbdev_sw_winsys *
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fbdev_sw_winsys(struct sw_winsys *ws)
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return (struct fbdev_sw_winsys *) ws;
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fbdev_displaytarget_display(struct sw_winsys *ws,
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struct sw_displaytarget *dt,
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void *context_private)
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struct fbdev_sw_winsys *fbdev = fbdev_sw_winsys(ws);
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struct fbdev_sw_displaytarget *fbdt = fbdev_sw_displaytarget(dt);
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unsigned rows, len, i;
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rows = MIN2(fbdt->height, fbdev->rows);
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len = util_format_get_stride(fbdt->format, fbdt->width);
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len = MIN2(len, fbdev->stride);
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for (i = 0; i < rows; i++) {
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void *dst = fbdev->fbmem + fbdev->stride * i;
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void *src = fbdt->data + fbdt->stride * i;
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memcpy(dst, src, len);
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fbdev_displaytarget_unmap(struct sw_winsys *ws,
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struct sw_displaytarget *dt)
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struct fbdev_sw_displaytarget *fbdt = fbdev_sw_displaytarget(dt);
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fbdev_displaytarget_map(struct sw_winsys *ws,
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struct sw_displaytarget *dt,
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struct fbdev_sw_displaytarget *fbdt = fbdev_sw_displaytarget(dt);
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fbdt->mapped = fbdt->data;
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fbdev_displaytarget_destroy(struct sw_winsys *ws,
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struct sw_displaytarget *dt)
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struct fbdev_sw_displaytarget *fbdt = fbdev_sw_displaytarget(dt);
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align_free(fbdt->data);
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static struct sw_displaytarget *
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fbdev_displaytarget_create(struct sw_winsys *ws,
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enum pipe_format format,
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unsigned width, unsigned height,
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struct fbdev_sw_winsys *fbdev = fbdev_sw_winsys(ws);
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struct fbdev_sw_displaytarget *fbdt;
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unsigned nblocksy, size, format_stride;
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if (fbdev->format != format)
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fbdt = CALLOC_STRUCT(fbdev_sw_displaytarget);
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fbdt->format = format;
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fbdt->height = height;
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format_stride = util_format_get_stride(format, width);
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fbdt->stride = align(format_stride, alignment);
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nblocksy = util_format_get_nblocksy(format, height);
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size = fbdt->stride * nblocksy;
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fbdt->data = align_malloc(size, alignment);
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*stride = fbdt->stride;
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return (struct sw_displaytarget *) fbdt;
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fbdev_is_displaytarget_format_supported(struct sw_winsys *ws,
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enum pipe_format format)
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struct fbdev_sw_winsys *fbdev = fbdev_sw_winsys(ws);
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return (fbdev->format == format);
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fbdev_destroy(struct sw_winsys *ws)
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struct fbdev_sw_winsys *fbdev = fbdev_sw_winsys(ws);
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munmap(fbdev->fbmem, fbdev->finfo.smem_len);
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fbdev_create_sw_winsys(int fd, enum pipe_format format)
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struct fbdev_sw_winsys *fbdev;
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fbdev = CALLOC_STRUCT(fbdev_sw_winsys);
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fbdev->format = format;
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if (ioctl(fbdev->fd, FBIOGET_FSCREENINFO, &fbdev->finfo)) {
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fbdev->fbmem = mmap(0, fbdev->finfo.smem_len,
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PROT_WRITE, MAP_SHARED, fbdev->fd, 0);
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if (fbdev->fbmem == MAP_FAILED) {
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fbdev->rows = fbdev->finfo.smem_len / fbdev->finfo.line_length;
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fbdev->stride = fbdev->finfo.line_length;
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fbdev->base.destroy = fbdev_destroy;
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fbdev->base.is_displaytarget_format_supported =
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fbdev_is_displaytarget_format_supported;
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fbdev->base.displaytarget_create = fbdev_displaytarget_create;
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fbdev->base.displaytarget_destroy = fbdev_displaytarget_destroy;
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fbdev->base.displaytarget_map = fbdev_displaytarget_map;
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fbdev->base.displaytarget_unmap = fbdev_displaytarget_unmap;
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fbdev->base.displaytarget_display = fbdev_displaytarget_display;