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/*
* Copyright © 2009 Intel Corporation
*
* 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, sublicense,
* 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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS 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.
*
* Authors:
* Eric Anholt <eric@anholt.net>
*
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include "glamor_priv.h"
static void
set_bit(uint8_t *bitfield, unsigned int index, unsigned int val)
{
int i = index / 8;
int mask = 1 << (index % 8);
if (val)
bitfield[i] |= mask;
else
bitfield[i] &= ~mask;
}
void
glamor_get_spans(DrawablePtr drawable,
int wmax,
DDXPointPtr points,
int *widths,
int count,
char *dst)
{
PixmapPtr pixmap = glamor_get_drawable_pixmap(drawable);
GLenum format, type;
int i, j;
uint8_t *temp_dst = NULL, *readpixels_dst = (uint8_t *)dst;
int x_off, y_off;
goto fail;
switch (drawable->depth) {
case 1:
temp_dst = xalloc(wmax);
format = GL_ALPHA;
type = GL_UNSIGNED_BYTE;
readpixels_dst = temp_dst;
break;
case 8:
format = GL_ALPHA;
type = GL_UNSIGNED_BYTE;
break;
case 24:
format = GL_RGB;
type = GL_UNSIGNED_BYTE;
break;
case 32:
format = GL_BGRA;
type = GL_UNSIGNED_INT_8_8_8_8_REV;
break;
default:
glamor_fallback("glamor_get_spans(): "
"Unknown getspans depth %d\n", drawable->depth);
goto fail;
}
if (!glamor_set_destination_pixmap(pixmap))
goto fail;
glamor_get_drawable_deltas(drawable, pixmap, &x_off, &y_off);
for (i = 0; i < count; i++) {
glReadPixels(points[i].x + x_off,
points[i].y + y_off,
widths[i],
1,
format, type,
readpixels_dst);
if (temp_dst) {
for (j = 0; j < widths[i]; j++) {
set_bit((uint8_t *)dst, j, temp_dst[j] & 0x1);
}
dst += PixmapBytePad(widths[i], drawable->depth);
} else {
readpixels_dst += PixmapBytePad(widths[i], drawable->depth);
}
}
xfree(temp_dst);
return;
fail:
free(temp_dst);
glamor_fallback("glamor_get_spans() from %p (%c)\n", drawable,
glamor_get_drawable_location(drawable));
if (glamor_prepare_access(drawable, GLAMOR_ACCESS_RO)) {
fbGetSpans(drawable, wmax, points, widths, count, dst);
glamor_finish_access(drawable);
}
}
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