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/*
* Copyright (C) 2019 Collabora, Ltd.
*
* 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 (Collabora):
* Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
*
*/
#ifndef __PAN_BLEND_H
#define __PAN_BLEND_H
#include "util/hash_table.h"
/* An internal blend shader descriptor, from the compiler */
struct panfrost_blend_shader {
struct panfrost_context *ctx;
/* The compiled shader */
void *buffer;
/* Byte count of the shader */
unsigned size;
/* Number of 128-bit work registers required by the shader */
unsigned work_count;
/* Offset into the shader to patch constants. Zero to disable patching
* (it is illogical to have constants at offset 0). */
unsigned patch_index;
/* First instruction tag (for tagging the pointer) */
unsigned first_tag;
};
/* A blend shader descriptor ready for actual use */
struct panfrost_blend_shader_final {
/* GPU address where we're compiled to */
uint64_t gpu;
/* First instruction tag (for tagging the pointer) */
unsigned first_tag;
/* Same meaning as panfrost_blend_shader */
unsigned work_count;
};
struct panfrost_blend_equation_final {
struct mali_blend_equation *equation;
float constant;
};
struct panfrost_blend_rt {
/* If has_fixed_function is set, equation is the
* fixed-function configuration for this blend state */
bool has_fixed_function;
struct mali_blend_equation equation;
/* Mask of blend color components read */
unsigned constant_mask;
/* Regardless of fixed-function blending, this is a map of pipe_format
* to panfrost_blend_shader */
struct hash_table_u64 *shaders;
};
struct panfrost_blend_state {
struct pipe_blend_state base;
struct panfrost_blend_rt rt[PIPE_MAX_COLOR_BUFS];
};
/* Container for a final blend state, specialized to constants and a
* framebuffer formats. */
struct panfrost_blend_final {
/* Set for a shader, clear for an equation */
bool is_shader;
/* Clear if the destination needs to be loaded from the tilebuffer */
bool no_blending;
/* Set if the colour mask is 0x0 (nothing is written) */
bool no_colour;
union {
struct panfrost_blend_shader_final shader;
struct panfrost_blend_equation_final equation;
};
};
void
panfrost_blend_context_init(struct pipe_context *pipe);
struct panfrost_blend_final
panfrost_get_blend_for_context(struct panfrost_context *ctx, unsigned rt, struct panfrost_bo **bo, unsigned *shader_offset);
#endif
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