115 lines
3.1 KiB
C
115 lines
3.1 KiB
C
/*
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* Copyright © 2009 Intel Corporation
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*
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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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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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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 DEALINGS
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* IN THE SOFTWARE.
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*
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* Authors:
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* Eric Anholt <eric@anholt.net>
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*
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*/
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#ifdef HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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#include "glamor_priv.h"
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static void
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set_bit(uint8_t *bitfield, unsigned int index, unsigned int val)
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{
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int i = index / 8;
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int mask = 1 << (index % 8);
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if (val)
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bitfield[i] |= mask;
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else
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bitfield[i] &= ~mask;
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}
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void
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glamor_get_spans(DrawablePtr drawable,
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int wmax,
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DDXPointPtr points,
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int *widths,
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int count,
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char *dst)
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{
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PixmapPtr pixmap = glamor_get_drawable_pixmap(drawable);
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GLenum format, type;
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int i, j;
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uint8_t *temp_dst = NULL, *readpixels_dst = (uint8_t *)dst;
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int x_off, y_off;
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switch (drawable->depth) {
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case 1:
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temp_dst = xalloc(wmax);
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format = GL_ALPHA;
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type = GL_UNSIGNED_BYTE;
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readpixels_dst = temp_dst;
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break;
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case 8:
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format = GL_ALPHA;
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type = GL_UNSIGNED_BYTE;
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break;
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case 24:
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case 32:
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format = GL_BGRA;
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type = GL_UNSIGNED_INT_8_8_8_8_REV;
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break;
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default:
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glamor_fallback("glamor_get_spans(): "
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"Unknown getspans depth %d\n", drawable->depth);
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goto fail;
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}
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if (!glamor_set_destination_pixmap(pixmap))
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goto fail;
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glamor_get_drawable_deltas(drawable, pixmap, &x_off, &y_off);
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for (i = 0; i < count; i++) {
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glReadPixels(points[i].x + x_off,
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pixmap->drawable.height - 1 - (points[i].y + y_off),
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widths[i],
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1,
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format, type,
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readpixels_dst);
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if (temp_dst) {
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for (j = 0; j < widths[i]; j++) {
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set_bit((uint8_t *)dst, j, temp_dst[j] & 0x1);
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}
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dst += PixmapBytePad(widths[i], drawable->depth);
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} else {
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readpixels_dst += PixmapBytePad(widths[i], drawable->depth);
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}
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}
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xfree(temp_dst);
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return;
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fail:
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free(temp_dst);
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glamor_fallback("glamor_get_spans() from %p (%c)\n", drawable,
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glamor_get_drawable_location(drawable));
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if (glamor_prepare_access(drawable, GLAMOR_ACCESS_RO)) {
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fbGetSpans(drawable, wmax, points, widths, count, dst);
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glamor_finish_access(drawable);
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}
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}
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