452 lines
15 KiB
C
452 lines
15 KiB
C
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/* -*- Mode: c; c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t; -*- */
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/*
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* Copyright © 2000 SuSE, Inc.
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* Copyright © 2007 Red Hat, Inc.
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of SuSE not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. SuSE makes no representations about the
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* suitability of this software for any purpose. It is provided "as is"
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* without express or implied warranty.
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*
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* SuSE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SuSE
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* BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Author: Keith Packard, SuSE, Inc.
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*/
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#ifndef PIXMAN_FAST_PATH_H__
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#define PIXMAN_FAST_PATH_H__
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#include "pixman-private.h"
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#define PIXMAN_REPEAT_COVER -1
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static force_inline pixman_bool_t
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repeat (pixman_repeat_t repeat, int *c, int size)
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{
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if (repeat == PIXMAN_REPEAT_NONE)
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{
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if (*c < 0 || *c >= size)
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return FALSE;
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}
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else if (repeat == PIXMAN_REPEAT_NORMAL)
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{
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while (*c >= size)
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*c -= size;
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while (*c < 0)
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*c += size;
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}
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else if (repeat == PIXMAN_REPEAT_PAD)
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{
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*c = CLIP (*c, 0, size - 1);
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}
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else /* REFLECT */
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{
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*c = MOD (*c, size * 2);
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if (*c >= size)
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*c = size * 2 - *c - 1;
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}
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return TRUE;
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}
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/*
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* For each scanline fetched from source image with PAD repeat:
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* - calculate how many pixels need to be padded on the left side
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* - calculate how many pixels need to be padded on the right side
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* - update width to only count pixels which are fetched from the image
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* All this information is returned via 'width', 'left_pad', 'right_pad'
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* arguments. The code is assuming that 'unit_x' is positive.
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*
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* Note: 64-bit math is used in order to avoid potential overflows, which
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* is probably excessive in many cases. This particular function
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* may need its own correctness test and performance tuning.
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*/
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static force_inline void
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pad_repeat_get_scanline_bounds (int32_t source_image_width,
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pixman_fixed_t vx,
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pixman_fixed_t unit_x,
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int32_t * width,
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int32_t * left_pad,
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int32_t * right_pad)
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{
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int64_t max_vx = (int64_t) source_image_width << 16;
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int64_t tmp;
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if (vx < 0)
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{
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tmp = ((int64_t) unit_x - 1 - vx) / unit_x;
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if (tmp > *width)
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{
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*left_pad = *width;
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*width = 0;
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}
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else
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{
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*left_pad = (int32_t) tmp;
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*width -= (int32_t) tmp;
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}
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}
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else
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{
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*left_pad = 0;
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}
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tmp = ((int64_t) unit_x - 1 - vx + max_vx) / unit_x - *left_pad;
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if (tmp < 0)
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{
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*right_pad = *width;
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*width = 0;
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}
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else if (tmp >= *width)
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{
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*right_pad = 0;
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}
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else
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{
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*right_pad = *width - (int32_t) tmp;
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*width = (int32_t) tmp;
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}
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}
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/* A macroified version of specialized nearest scalers for some
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* common 8888 and 565 formats. It supports SRC and OVER ops.
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*
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* There are two repeat versions, one that handles repeat normal,
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* and one without repeat handling that only works if the src region
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* used is completely covered by the pre-repeated source samples.
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*
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* The loops are unrolled to process two pixels per iteration for better
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* performance on most CPU architectures (superscalar processors
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* can issue several operations simultaneously, other processors can hide
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* instructions latencies by pipelining operations). Unrolling more
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* does not make much sense because the compiler will start running out
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* of spare registers soon.
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*/
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#define GET_8888_ALPHA(s) ((s) >> 24)
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/* This is not actually used since we don't have an OVER with
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565 source, but it is needed to build. */
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#define GET_0565_ALPHA(s) 0xff
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#define FAST_NEAREST_SCANLINE(scanline_func_name, SRC_FORMAT, DST_FORMAT, \
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src_type_t, dst_type_t, OP, repeat_mode) \
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static force_inline void \
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scanline_func_name (dst_type_t *dst, \
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src_type_t *src, \
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int32_t w, \
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pixman_fixed_t vx, \
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pixman_fixed_t unit_x, \
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pixman_fixed_t max_vx) \
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{ \
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uint32_t d; \
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src_type_t s1, s2; \
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uint8_t a1, a2; \
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int x1, x2; \
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\
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if (PIXMAN_OP_ ## OP != PIXMAN_OP_SRC && PIXMAN_OP_ ## OP != PIXMAN_OP_OVER) \
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abort(); \
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\
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while ((w -= 2) >= 0) \
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{ \
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x1 = vx >> 16; \
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vx += unit_x; \
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if (PIXMAN_REPEAT_ ## repeat_mode == PIXMAN_REPEAT_NORMAL) \
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{ \
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/* This works because we know that unit_x is positive */ \
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while (vx >= max_vx) \
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vx -= max_vx; \
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} \
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s1 = src[x1]; \
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\
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x2 = vx >> 16; \
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vx += unit_x; \
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if (PIXMAN_REPEAT_ ## repeat_mode == PIXMAN_REPEAT_NORMAL) \
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{ \
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/* This works because we know that unit_x is positive */ \
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while (vx >= max_vx) \
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vx -= max_vx; \
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} \
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s2 = src[x2]; \
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\
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if (PIXMAN_OP_ ## OP == PIXMAN_OP_OVER) \
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{ \
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a1 = GET_ ## SRC_FORMAT ## _ALPHA(s1); \
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a2 = GET_ ## SRC_FORMAT ## _ALPHA(s2); \
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\
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if (a1 == 0xff) \
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{ \
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*dst = CONVERT_ ## SRC_FORMAT ## _TO_ ## DST_FORMAT (s1); \
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} \
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else if (s1) \
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{ \
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d = CONVERT_ ## DST_FORMAT ## _TO_8888 (*dst); \
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s1 = CONVERT_ ## SRC_FORMAT ## _TO_8888 (s1); \
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a1 ^= 0xff; \
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UN8x4_MUL_UN8_ADD_UN8x4 (d, a1, s1); \
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*dst = CONVERT_8888_TO_ ## DST_FORMAT (d); \
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} \
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dst++; \
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\
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if (a2 == 0xff) \
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{ \
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*dst = CONVERT_ ## SRC_FORMAT ## _TO_ ## DST_FORMAT (s2); \
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} \
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else if (s2) \
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{ \
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d = CONVERT_## DST_FORMAT ## _TO_8888 (*dst); \
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s2 = CONVERT_## SRC_FORMAT ## _TO_8888 (s2); \
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a2 ^= 0xff; \
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UN8x4_MUL_UN8_ADD_UN8x4 (d, a2, s2); \
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*dst = CONVERT_8888_TO_ ## DST_FORMAT (d); \
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} \
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dst++; \
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} \
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else /* PIXMAN_OP_SRC */ \
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{ \
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*dst++ = CONVERT_ ## SRC_FORMAT ## _TO_ ## DST_FORMAT (s1); \
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*dst++ = CONVERT_ ## SRC_FORMAT ## _TO_ ## DST_FORMAT (s2); \
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} \
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} \
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\
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if (w & 1) \
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{ \
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x1 = vx >> 16; \
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s1 = src[x1]; \
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\
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if (PIXMAN_OP_ ## OP == PIXMAN_OP_OVER) \
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{ \
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a1 = GET_ ## SRC_FORMAT ## _ALPHA(s1); \
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\
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if (a1 == 0xff) \
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{ \
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*dst = CONVERT_ ## SRC_FORMAT ## _TO_ ## DST_FORMAT (s1); \
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} \
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else if (s1) \
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{ \
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d = CONVERT_## DST_FORMAT ## _TO_8888 (*dst); \
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s1 = CONVERT_ ## SRC_FORMAT ## _TO_8888 (s1); \
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a1 ^= 0xff; \
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UN8x4_MUL_UN8_ADD_UN8x4 (d, a1, s1); \
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*dst = CONVERT_8888_TO_ ## DST_FORMAT (d); \
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} \
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dst++; \
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} \
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else /* PIXMAN_OP_SRC */ \
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{ \
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*dst++ = CONVERT_ ## SRC_FORMAT ## _TO_ ## DST_FORMAT (s1); \
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} \
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} \
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}
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#define FAST_NEAREST_MAINLOOP_INT(scale_func_name, scanline_func, src_type_t, dst_type_t, \
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repeat_mode) \
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static void \
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fast_composite_scaled_nearest ## scale_func_name (pixman_implementation_t *imp, \
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pixman_op_t op, \
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pixman_image_t * src_image, \
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pixman_image_t * mask_image, \
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pixman_image_t * dst_image, \
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int32_t src_x, \
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int32_t src_y, \
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int32_t mask_x, \
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int32_t mask_y, \
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int32_t dst_x, \
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int32_t dst_y, \
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int32_t width, \
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int32_t height) \
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{ \
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dst_type_t *dst_line; \
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src_type_t *src_first_line; \
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int y; \
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pixman_fixed_t max_vx = max_vx; /* suppress uninitialized variable warning */ \
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pixman_fixed_t max_vy; \
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pixman_vector_t v; \
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pixman_fixed_t vx, vy; \
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pixman_fixed_t unit_x, unit_y; \
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int32_t left_pad, right_pad; \
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\
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src_type_t *src; \
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dst_type_t *dst; \
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int src_stride, dst_stride; \
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\
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PIXMAN_IMAGE_GET_LINE (dst_image, dst_x, dst_y, dst_type_t, dst_stride, dst_line, 1); \
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/* pass in 0 instead of src_x and src_y because src_x and src_y need to be \
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* transformed from destination space to source space */ \
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PIXMAN_IMAGE_GET_LINE (src_image, 0, 0, src_type_t, src_stride, src_first_line, 1); \
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\
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/* reference point is the center of the pixel */ \
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v.vector[0] = pixman_int_to_fixed (src_x) + pixman_fixed_1 / 2; \
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v.vector[1] = pixman_int_to_fixed (src_y) + pixman_fixed_1 / 2; \
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v.vector[2] = pixman_fixed_1; \
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\
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if (!pixman_transform_point_3d (src_image->common.transform, &v)) \
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return; \
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\
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unit_x = src_image->common.transform->matrix[0][0]; \
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unit_y = src_image->common.transform->matrix[1][1]; \
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\
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/* Round down to closest integer, ensuring that 0.5 rounds to 0, not 1 */ \
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v.vector[0] -= pixman_fixed_e; \
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v.vector[1] -= pixman_fixed_e; \
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\
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vx = v.vector[0]; \
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vy = v.vector[1]; \
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\
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if (PIXMAN_REPEAT_ ## repeat_mode == PIXMAN_REPEAT_NORMAL) \
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{ \
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/* Clamp repeating positions inside the actual samples */ \
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max_vx = src_image->bits.width << 16; \
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max_vy = src_image->bits.height << 16; \
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\
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repeat (PIXMAN_REPEAT_NORMAL, &vx, max_vx); \
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repeat (PIXMAN_REPEAT_NORMAL, &vy, max_vy); \
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} \
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\
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if (PIXMAN_REPEAT_ ## repeat_mode == PIXMAN_REPEAT_PAD || \
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PIXMAN_REPEAT_ ## repeat_mode == PIXMAN_REPEAT_NONE) \
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{ \
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pad_repeat_get_scanline_bounds (src_image->bits.width, vx, unit_x, \
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&width, &left_pad, &right_pad); \
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vx += left_pad * unit_x; \
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} \
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\
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while (--height >= 0) \
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{ \
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dst = dst_line; \
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dst_line += dst_stride; \
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\
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y = vy >> 16; \
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vy += unit_y; \
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if (PIXMAN_REPEAT_ ## repeat_mode == PIXMAN_REPEAT_NORMAL) \
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repeat (PIXMAN_REPEAT_NORMAL, &vy, max_vy); \
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if (PIXMAN_REPEAT_ ## repeat_mode == PIXMAN_REPEAT_PAD) \
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{ \
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repeat (PIXMAN_REPEAT_PAD, &y, src_image->bits.height); \
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src = src_first_line + src_stride * y; \
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if (left_pad > 0) \
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{ \
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scanline_func (dst, src, left_pad, 0, 0, 0); \
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} \
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if (width > 0) \
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{ \
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scanline_func (dst + left_pad, src, width, vx, unit_x, 0); \
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} \
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if (right_pad > 0) \
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{ \
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scanline_func (dst + left_pad + width, src + src_image->bits.width - 1, \
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right_pad, 0, 0, 0); \
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|
|
} \
|
||
|
|
} \
|
||
|
|
else if (PIXMAN_REPEAT_ ## repeat_mode == PIXMAN_REPEAT_NONE) \
|
||
|
|
{ \
|
||
|
|
static src_type_t zero = 0; \
|
||
|
|
if (y < 0 || y >= src_image->bits.height) \
|
||
|
|
{ \
|
||
|
|
scanline_func (dst, &zero, left_pad + width + right_pad, 0, 0, 0); \
|
||
|
|
continue; \
|
||
|
|
} \
|
||
|
|
src = src_first_line + src_stride * y; \
|
||
|
|
if (left_pad > 0) \
|
||
|
|
{ \
|
||
|
|
scanline_func (dst, &zero, left_pad, 0, 0, 0); \
|
||
|
|
} \
|
||
|
|
if (width > 0) \
|
||
|
|
{ \
|
||
|
|
scanline_func (dst + left_pad, src, width, vx, unit_x, 0); \
|
||
|
|
} \
|
||
|
|
if (right_pad > 0) \
|
||
|
|
{ \
|
||
|
|
scanline_func (dst + left_pad + width, &zero, right_pad, 0, 0, 0); \
|
||
|
|
} \
|
||
|
|
} \
|
||
|
|
else \
|
||
|
|
{ \
|
||
|
|
src = src_first_line + src_stride * y; \
|
||
|
|
scanline_func (dst, src, width, vx, unit_x, max_vx); \
|
||
|
|
} \
|
||
|
|
} \
|
||
|
|
}
|
||
|
|
|
||
|
|
/* A workaround for old sun studio, see: https://bugs.freedesktop.org/show_bug.cgi?id=32764 */
|
||
|
|
#define FAST_NEAREST_MAINLOOP(scale_func_name, scanline_func, src_type_t, dst_type_t, \
|
||
|
|
repeat_mode) \
|
||
|
|
FAST_NEAREST_MAINLOOP_INT(_ ## scale_func_name, scanline_func, src_type_t, dst_type_t, \
|
||
|
|
repeat_mode) \
|
||
|
|
|
||
|
|
#define FAST_NEAREST(scale_func_name, SRC_FORMAT, DST_FORMAT, \
|
||
|
|
src_type_t, dst_type_t, OP, repeat_mode) \
|
||
|
|
FAST_NEAREST_SCANLINE(scaled_nearest_scanline_ ## scale_func_name ## _ ## OP, \
|
||
|
|
SRC_FORMAT, DST_FORMAT, src_type_t, dst_type_t, \
|
||
|
|
OP, repeat_mode) \
|
||
|
|
FAST_NEAREST_MAINLOOP_INT(_ ## scale_func_name ## _ ## OP, \
|
||
|
|
scaled_nearest_scanline_ ## scale_func_name ## _ ## OP, \
|
||
|
|
src_type_t, dst_type_t, repeat_mode) \
|
||
|
|
\
|
||
|
|
extern int no_such_variable
|
||
|
|
|
||
|
|
|
||
|
|
#define SCALED_NEAREST_FLAGS \
|
||
|
|
(FAST_PATH_SCALE_TRANSFORM | \
|
||
|
|
FAST_PATH_NO_ALPHA_MAP | \
|
||
|
|
FAST_PATH_NEAREST_FILTER | \
|
||
|
|
FAST_PATH_NO_ACCESSORS | \
|
||
|
|
FAST_PATH_NARROW_FORMAT)
|
||
|
|
|
||
|
|
#define SIMPLE_NEAREST_FAST_PATH_NORMAL(op,s,d,func) \
|
||
|
|
{ PIXMAN_OP_ ## op, \
|
||
|
|
PIXMAN_ ## s, \
|
||
|
|
(SCALED_NEAREST_FLAGS | \
|
||
|
|
FAST_PATH_NORMAL_REPEAT | \
|
||
|
|
FAST_PATH_X_UNIT_POSITIVE), \
|
||
|
|
PIXMAN_null, 0, \
|
||
|
|
PIXMAN_ ## d, FAST_PATH_STD_DEST_FLAGS, \
|
||
|
|
fast_composite_scaled_nearest_ ## func ## _normal ## _ ## op, \
|
||
|
|
}
|
||
|
|
|
||
|
|
#define SIMPLE_NEAREST_FAST_PATH_PAD(op,s,d,func) \
|
||
|
|
{ PIXMAN_OP_ ## op, \
|
||
|
|
PIXMAN_ ## s, \
|
||
|
|
(SCALED_NEAREST_FLAGS | \
|
||
|
|
FAST_PATH_PAD_REPEAT | \
|
||
|
|
FAST_PATH_X_UNIT_POSITIVE), \
|
||
|
|
PIXMAN_null, 0, \
|
||
|
|
PIXMAN_ ## d, FAST_PATH_STD_DEST_FLAGS, \
|
||
|
|
fast_composite_scaled_nearest_ ## func ## _pad ## _ ## op, \
|
||
|
|
}
|
||
|
|
|
||
|
|
#define SIMPLE_NEAREST_FAST_PATH_NONE(op,s,d,func) \
|
||
|
|
{ PIXMAN_OP_ ## op, \
|
||
|
|
PIXMAN_ ## s, \
|
||
|
|
(SCALED_NEAREST_FLAGS | \
|
||
|
|
FAST_PATH_NONE_REPEAT | \
|
||
|
|
FAST_PATH_X_UNIT_POSITIVE), \
|
||
|
|
PIXMAN_null, 0, \
|
||
|
|
PIXMAN_ ## d, FAST_PATH_STD_DEST_FLAGS, \
|
||
|
|
fast_composite_scaled_nearest_ ## func ## _none ## _ ## op, \
|
||
|
|
}
|
||
|
|
|
||
|
|
#define SIMPLE_NEAREST_FAST_PATH_COVER(op,s,d,func) \
|
||
|
|
{ PIXMAN_OP_ ## op, \
|
||
|
|
PIXMAN_ ## s, \
|
||
|
|
SCALED_NEAREST_FLAGS | FAST_PATH_SAMPLES_COVER_CLIP, \
|
||
|
|
PIXMAN_null, 0, \
|
||
|
|
PIXMAN_ ## d, FAST_PATH_STD_DEST_FLAGS, \
|
||
|
|
fast_composite_scaled_nearest_ ## func ## _cover ## _ ## op, \
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Prefer the use of 'cover' variant, because it is faster */
|
||
|
|
#define SIMPLE_NEAREST_FAST_PATH(op,s,d,func) \
|
||
|
|
SIMPLE_NEAREST_FAST_PATH_COVER (op,s,d,func), \
|
||
|
|
SIMPLE_NEAREST_FAST_PATH_NONE (op,s,d,func), \
|
||
|
|
SIMPLE_NEAREST_FAST_PATH_PAD (op,s,d,func), \
|
||
|
|
SIMPLE_NEAREST_FAST_PATH_NORMAL (op,s,d,func)
|
||
|
|
|
||
|
|
#endif
|