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/*
* Copyright © 2006 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:
* Wang Zhenyu <zhenyu.z.wang@intel.com>
* Keith Packard <keithp@keithp.com>
*/
/* Sample the src surface in planar format */
include(`exa_wm.g4i')
/* prepare sampler read back gX register, which would be written back to output */
/* use simd16 sampler, param 0 is u, param 1 is v. */
/* 'payload' loading, assuming tex coord start from g4 */
/* load r */
mov (1) g0.8<1>UD 0x0000e000UD { align1 mask_disable };
/* src_msg will be copied with g0, as it contains send desc */
/* emit sampler 'send' cmd */
/* sample Y */
send (16) src_msg_ind /* msg reg index */
src_sample_g<1>UW /* readback */
g0<8,8,1>UW /* copy to msg start reg*/
sampler (1,0,F) /* sampler message description, (binding_table,sampler_index,datatype)*/
mlen 5 rlen 2 {align1};
/* sample U (Cr) */
send (16) src_msg_ind /* msg reg index */
src_sample_r<1>UW /* readback */
g0<8,8,1>UW /* copy to msg start reg*/
sampler (1,2,F) /* sampler message description, (binding_table,sampler_index,datatype)
/* here(src->dst) we should use src_sampler and src_surface */
mlen 5 rlen 2 { align1 }; /* required message len 5, readback len 8 */
/* sample V (Cb) */
send (16) src_msg_ind /* msg reg index */
src_sample_b<1>UW /* readback */
g0<8,8,1>UW /* copy to msg start reg*/
sampler (1,4,F) /* sampler message description, (binding_table,sampler_index,datatype)
/* here(src->dst) we should use src_sampler and src_surface */
mlen 5 rlen 2 { align1 }; /* required message len 5, readback len 8 */
/*extract alpha value, alpha value stores in one float with color value, because the color value is small,
we can neglect it when doing alpha blend*/
mov (8) src_sample_a<1>F g14<8,8,1>F { align1 };
mov (8) src_sample_a_23<1>F g15<8,8,1>F { align1 };
/*set subtitle color*/
add (8) g14<1>F g14<8,8,1>F 0.5F { align1 };
add (8) g15<1>F g15<8,8,1>F 0.5F { align1 };
add (8) g16<1>F g16<8,8,1>F 0.5F { align1 };
add (8) g17<1>F g17<8,8,1>F 0.5F { align1 };
add (8) g18<1>F g18<8,8,1>F 0.5F { align1 };
add (8) g19<1>F g19<8,8,1>F 0.5F { align1 };
nop;
nop;
nop;
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