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/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can
* be found in the LICENSE file.
*
*/
#ifndef SKC_COMMON_ONCE
#define SKC_COMMON_ONCE
//
// structures common to both host and device -- placeholder until
// everything shakes out
//
union skc_transform
{
//
// Transform is always scaled s.t. w2 is 1.0f
//
skc_float f32a8[8];
skc_float8 f32v8;
struct {
skc_float sx;
skc_float shx;
skc_float tx;
skc_float shy;
skc_float sy;
skc_float ty;
skc_float w0;
skc_float w1;
};
};
//
//
//
union skc_path_clip
{
skc_float f32a4[4]; // FIXME -- use the SIMD4 representation trick
skc_float4 f32v4;
struct {
skc_float x0;
skc_float y0;
skc_float x1;
skc_float y1;
};
};
//
// host-side path fill cmd that is expanded into rasterization cmds
//
// FIXME -- these magic numbers will be replaced with tile.h constants
//
// FIXME -- make this command opaque by moving it into the platform impl
//
// FIXME -- NEED TO EVALUATE IF THIS DISTRIBUTION OF BITS IS GOING TO
// BE TOO SMALL -- plenty of room to jiggle these bits
//
#define SKC_CMD_FILL_BITS_TRANSFORM 12 // distinct transforms -- perhaps too generous
#define SKC_CMD_FILL_BITS_CLIP 12 // distinct clips -- perhaps too generous
#define SKC_CMD_FILL_BITS_COHORT 8 // perhaps too small
//
//
//
typedef skc_uint skc_path_h; // host path handle
union skc_cmd_fill
{
skc_ulong u64;
skc_uint2 u32v2;
struct {
skc_path_h path; // host path id
#if defined(__OPENCL_C_VERSION__)
skc_uint tcc;
#else
skc_uint transform : SKC_CMD_FILL_BITS_TRANSFORM;
skc_uint clip : SKC_CMD_FILL_BITS_CLIP;
skc_uint cohort : SKC_CMD_FILL_BITS_COHORT;
#endif
};
};
//
//
//
typedef skc_uint skc_raster_h;
union skc_cmd_place
{
skc_uint4 u32v4;
struct {
skc_raster_h raster_h;
skc_uint layer_id;
skc_uint tx;
skc_uint ty;
};
};
SKC_STATIC_ASSERT(sizeof(union skc_cmd_place) == sizeof(skc_uint4));
//
//
//
#endif
//
//
//
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