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gl-renderer: add declaration of color mapping function

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Introduce shader color mapping identity and 3D LUT.
Shader requirements struct uses union for color mapping
to prepare the place for 3x3 matrix.

Signed-off-by: Vitaly Prosyak <vitaly.prosyak@amd.com>
This commit is contained in:
Vitaly Prosyak 2021-09-09 14:22:43 -04:00
parent 2e2ad02d5c
commit cda130e4b0
1 changed files with 16 additions and 2 deletions
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18
libweston/renderer-gl/gl-renderer-internal.h
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@ -2,6 +2,7 @@
* Copyright © 2019 Collabora, Ltd.
* Copyright © 2019 Harish Krupo
* Copyright © 2019 Intel Corporation
* Copyright 2021 Advanced Micro Devices, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
@ -56,6 +57,12 @@ enum gl_shader_color_curve {
SHADER_COLOR_CURVE_LUT_3x1D,
};
/* Keep the following in sync with fragment.glsl. */
enum gl_shader_color_mapping {
SHADER_COLOR_MAPPING_IDENTITY = 0,
SHADER_COLOR_MAPPING_3DLUT,
};
/** GL shader requirements key
*
* This structure is used as a binary blob key for building and searching
@ -70,13 +77,14 @@ struct gl_shader_requirements
unsigned variant:4; /* enum gl_shader_texture_variant */
bool input_is_premult:1;
bool green_tint:1;
unsigned color_pre_curve:1; /* enum gl_shader_color_curve */
unsigned color_pre_curve:1; /* enum gl_shader_color_curve */
unsigned color_mapping:1; /* enum gl_shader_color_mapping */
/*
* The total size of all bitfields plus pad_bits_ must fill up exactly
* how many bytes the compiler allocates for them together.
*/
unsigned pad_bits_:25;
unsigned pad_bits_:24;
};
static_assert(sizeof(struct gl_shader_requirements) ==
4 /* total bitfield size in bytes */,
@ -96,6 +104,12 @@ struct gl_shader_config {
GLuint input_tex[GL_SHADER_INPUT_TEX_MAX];
GLuint color_pre_curve_lut_tex;
GLfloat color_pre_curve_lut_scale_offset[2];
union {
struct {
GLuint tex;
GLfloat scale_offset[2];
} lut3d;
} color_mapping;
};
struct gl_renderer {