142ec0f477
Here are more tests for output decorations drawing, this time through the color-lcms plugin. This is the only practical way to exercise the input-to-output category of color transformations. Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
888 lines
26 KiB
C
888 lines
26 KiB
C
/*
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* Copyright 2021 Advanced Micro Devices, Inc.
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* Copyright 2020, 2022 Collabora, Ltd.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "config.h"
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#include <math.h>
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#include <string.h>
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#include <stdio.h>
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#include <linux/limits.h>
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#include <lcms2.h>
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#include "weston-test-client-helper.h"
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#include "weston-test-fixture-compositor.h"
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#include "color_util.h"
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#include "image-iter.h"
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#include "lcms_util.h"
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struct lcms_pipeline {
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/**
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* Color space name
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*/
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const char *color_space;
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/**
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* Chromaticities for output profile
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*/
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cmsCIExyYTRIPLE prim_output;
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/**
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* tone curve enum
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*/
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enum transfer_fn pre_fn;
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/**
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* Transform matrix from sRGB to target chromaticities in prim_output
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*/
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struct lcmsMAT3 mat;
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/**
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* matrix from prim_output to XYZ, for example matrix conversion
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* sRGB->XYZ, adobeRGB->XYZ, bt2020->XYZ
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*/
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struct lcmsMAT3 mat2XYZ;
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/**
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* tone curve enum
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*/
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enum transfer_fn post_fn;
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};
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static const int WINDOW_WIDTH = 256;
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static const int WINDOW_HEIGHT = 24;
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static cmsCIExyY wp_d65 = { 0.31271, 0.32902, 1.0 };
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enum profile_type {
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PTYPE_MATRIX_SHAPER,
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PTYPE_CLUT,
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};
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/*
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* Using currently destination gamut bigger than source.
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* Using https://www.colour-science.org/ we can extract conversion matrix:
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* import colour
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* colour.matrix_RGB_to_RGB(colour.RGB_COLOURSPACES['sRGB'], colour.RGB_COLOURSPACES['Adobe RGB (1998)'], None)
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* colour.matrix_RGB_to_RGB(colour.RGB_COLOURSPACES['sRGB'], colour.RGB_COLOURSPACES['ITU-R BT.2020'], None)
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*/
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const struct lcms_pipeline pipeline_sRGB = {
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.color_space = "sRGB",
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.prim_output = {
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.Red = { 0.640, 0.330, 1.0 },
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.Green = { 0.300, 0.600, 1.0 },
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.Blue = { 0.150, 0.060, 1.0 }
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},
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.pre_fn = TRANSFER_FN_SRGB_EOTF,
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.mat = LCMSMAT3(1.0, 0.0, 0.0,
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0.0, 1.0, 0.0,
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0.0, 0.0, 1.0),
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.mat2XYZ = LCMSMAT3(0.436037, 0.385124, 0.143039,
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0.222482, 0.716913, 0.060605,
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0.013922, 0.097078, 0.713899),
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.post_fn = TRANSFER_FN_SRGB_EOTF_INVERSE
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};
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const struct lcms_pipeline pipeline_adobeRGB = {
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.color_space = "adobeRGB",
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.prim_output = {
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.Red = { 0.640, 0.330, 1.0 },
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.Green = { 0.210, 0.710, 1.0 },
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.Blue = { 0.150, 0.060, 1.0 }
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},
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.pre_fn = TRANSFER_FN_SRGB_EOTF,
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.mat = LCMSMAT3( 0.715127, 0.284868, 0.000005,
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0.000001, 0.999995, 0.000004,
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-0.000003, 0.041155, 0.958848),
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.mat2XYZ = LCMSMAT3(0.609740, 0.205279, 0.149181,
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0.311111, 0.625681, 0.063208,
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0.019469, 0.060879, 0.744552),
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.post_fn = TRANSFER_FN_ADOBE_RGB_EOTF_INVERSE
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};
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const struct lcms_pipeline pipeline_BT2020 = {
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.color_space = "bt2020",
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.prim_output = {
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.Red = { 0.708, 0.292, 1.0 },
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.Green = { 0.170, 0.797, 1.0 },
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.Blue = { 0.131, 0.046, 1.0 }
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},
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.pre_fn = TRANSFER_FN_SRGB_EOTF,
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.mat = LCMSMAT3(0.627402, 0.329292, 0.043306,
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0.069095, 0.919544, 0.011360,
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0.016394, 0.088028, 0.895578),
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/* this is equivalent to BT.1886 with zero black level */
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.post_fn = TRANSFER_FN_POWER2_4_EOTF_INVERSE,
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};
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struct setup_args {
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struct fixture_metadata meta;
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int ref_image_index;
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const struct lcms_pipeline *pipeline;
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/**
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* Two-norm color error tolerance in units of 1.0/255, computed in
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* output electrical space.
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*
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* Tolerance depends more on the 1D LUT used for the
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* inv EOTF than the tested 3D LUT size:
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* 9x9x9, 17x17x17, 33x33x33, 127x127x127
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*
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* TODO: when we add power-law in the curve enumeration
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* in GL-renderer, then we should fix the tolerance
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* as the error should reduce a lot.
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*/
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float tolerance;
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/**
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* 3DLUT dimension size
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*/
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int dim_size;
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enum profile_type type;
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/** Two-norm error limit for cLUT DToB->BToD roundtrip */
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float clut_roundtrip_tolerance;
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};
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static const struct setup_args my_setup_args[] = {
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/* name, ref img, pipeline, tolerance, dim, profile type, clut tolerance */
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{ { "sRGB->sRGB" }, 0, &pipeline_sRGB, 0.0, 0, PTYPE_MATRIX_SHAPER },
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{ { "sRGB->adobeRGB" }, 1, &pipeline_adobeRGB, 1.4, 0, PTYPE_MATRIX_SHAPER },
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{ { "sRGB->BT2020" }, 2, &pipeline_BT2020, 4.5, 0, PTYPE_MATRIX_SHAPER },
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{ { "sRGB->sRGB" }, 0, &pipeline_sRGB, 0.0, 17, PTYPE_CLUT, 0.0005 },
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{ { "sRGB->adobeRGB" }, 1, &pipeline_adobeRGB, 1.8, 17, PTYPE_CLUT, 0.0065 },
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};
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static void
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test_roundtrip(uint8_t r, uint8_t g, uint8_t b, cmsPipeline *pip,
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struct rgb_diff_stat *stat)
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{
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struct color_float in = { .rgb = { r / 255.0, g / 255.0, b / 255.0 } };
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struct color_float out = {};
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cmsPipelineEvalFloat(in.rgb, out.rgb, pip);
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rgb_diff_stat_update(stat, &in, &out, &in);
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}
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/*
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* Roundtrip verification tests that converting device -> PCS -> device
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* results in the original color values close enough.
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*
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* This ensures that the two pipelines are probably built correctly, and we
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* do not have problems with unexpected value clamping or with representing
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* (inverse) EOTF curves.
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*/
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static void
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roundtrip_verification(cmsPipeline *DToB, cmsPipeline *BToD, float tolerance)
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{
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unsigned r, g, b;
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struct rgb_diff_stat stat = {};
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cmsPipeline *pip;
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pip = cmsPipelineDup(DToB);
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cmsPipelineCat(pip, BToD);
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/*
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* Inverse-EOTF is known to have precision problems near zero, so
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* sample near zero densely, the rest can be more sparse to run faster.
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*/
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for (r = 0; r < 256; r += (r < 15) ? 1 : 8) {
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for (g = 0; g < 256; g += (g < 15) ? 1 : 8) {
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for (b = 0; b < 256; b += (b < 15) ? 1 : 8)
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test_roundtrip(r, g, b, pip, &stat);
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}
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}
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cmsPipelineFree(pip);
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rgb_diff_stat_print(&stat, "DToB->BToD roundtrip", 8);
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assert(stat.two_norm.max < tolerance);
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}
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static cmsInt32Number
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sampler_matrix(const float src[], float dst[], void *cargo)
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{
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const struct lcmsMAT3 *mat = cargo;
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struct color_float in = { .r = src[0], .g = src[1], .b = src[2] };
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struct color_float cf;
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unsigned i;
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cf = color_float_apply_matrix(mat, in);
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for (i = 0; i < COLOR_CHAN_NUM; i++)
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dst[i] = cf.rgb[i];
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return 1;
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}
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static cmsStage *
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create_cLUT_from_matrix(cmsContext context_id, const struct lcmsMAT3 *mat, int dim_size)
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{
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cmsStage *cLUT_stage;
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cLUT_stage = cmsStageAllocCLutFloat(context_id, dim_size, 3, 3, NULL);
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cmsStageSampleCLutFloat(cLUT_stage, sampler_matrix, (void *)mat, 0);
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return cLUT_stage;
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}
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/*
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* Originally the cLUT profile test attempted to use the AToB/BToA tags. Those
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* come with serious limitations though: at most uint16 representation for
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* values in a LUT which means LUT entry precision is limited and range is
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* [0.0, 1.0]. This poses difficulties such as:
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* - for AToB, the resulting PCS XYZ values may need to be > 1.0
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* - for BToA, it is easy to fall outside of device color volume meaning that
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* out-of-range values are needed in the 3D LUT
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* Working around these could require offsetting and scaling of values
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* before and after the 3D LUT, and even that may not always be possible.
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*
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* DToB/BToD tags do not have most of these problems, because there pipelines
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* use float32 representation throughout. We have much more precision, and
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* we can mostly use negative and greater than 1.0 values. LUT elements
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* still clamp their input to [0.0, 1.0] before applying the LUT. This type of
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* pipeline is called multiProcessElement (MPE).
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*
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* MPE also allows us to represent curves in a few analytical forms. These are
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* just enough to represent the EOTF curves we have and their inverses, but
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* they do not allow encoding extended EOTF curves or their inverses
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* (defined for all real numbers by extrapolation, and mirroring for negative
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* inputs). Using MPE curves we avoid the precision problems that arise from
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* attempting to represent an inverse-EOTF as a LUT. For the precision issue,
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* see: https://gitlab.freedesktop.org/pq/color-and-hdr/-/merge_requests/9
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*
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* MPE is not a complete remedy, because 3D LUT inputs are still always clamped
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* to [0.0, 1.0]. Therefore a 3D LUT cannot represent the inverse of a matrix
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* that can produce negative or greater than 1.0 values without further tricks
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* (scaling and offsetting) in the pipeline. Rather than implementing that
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* complication, we decided to just not test with such matrices. Therefore
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* BT.2020 color space is not used in the cLUT test. AdobeRGB is enough.
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*/
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static cmsHPROFILE
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build_lcms_clut_profile_output(cmsContext context_id,
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const struct setup_args *arg)
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{
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enum transfer_fn inv_eotf_fn = arg->pipeline->post_fn;
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enum transfer_fn eotf_fn = transfer_fn_invert(inv_eotf_fn);
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cmsHPROFILE hRGB;
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cmsPipeline *DToB0, *BToD0;
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cmsStage *stage;
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cmsStage *stage_inv_eotf;
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cmsStage *stage_eotf;
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struct lcmsMAT3 mat2XYZ_inv;
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lcmsMAT3_invert(&mat2XYZ_inv, &arg->pipeline->mat2XYZ);
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hRGB = cmsCreateProfilePlaceholder(context_id);
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cmsSetProfileVersion(hRGB, 4.3);
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cmsSetDeviceClass(hRGB, cmsSigDisplayClass);
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cmsSetColorSpace(hRGB, cmsSigRgbData);
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cmsSetPCS(hRGB, cmsSigXYZData);
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SetTextTags(hRGB, L"cLut profile");
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stage_eotf = build_MPE_curve_stage(context_id, eotf_fn);
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stage_inv_eotf = build_MPE_curve_stage(context_id, inv_eotf_fn);
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/*
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* Pipeline from PCS (optical) to device (electrical)
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*/
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BToD0 = cmsPipelineAlloc(context_id, 3, 3);
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stage = create_cLUT_from_matrix(context_id, &mat2XYZ_inv, arg->dim_size);
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cmsPipelineInsertStage(BToD0, cmsAT_END, stage);
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cmsPipelineInsertStage(BToD0, cmsAT_END, cmsStageDup(stage_inv_eotf));
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cmsWriteTag(hRGB, cmsSigBToD0Tag, BToD0);
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cmsLinkTag(hRGB, cmsSigBToD1Tag, cmsSigBToD0Tag);
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cmsLinkTag(hRGB, cmsSigBToD2Tag, cmsSigBToD0Tag);
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cmsLinkTag(hRGB, cmsSigBToD3Tag, cmsSigBToD0Tag);
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/*
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* Pipeline from device (electrical) to PCS (optical)
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*/
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DToB0 = cmsPipelineAlloc(context_id, 3, 3);
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cmsPipelineInsertStage(DToB0, cmsAT_END, cmsStageDup(stage_eotf));
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stage = create_cLUT_from_matrix(context_id, &arg->pipeline->mat2XYZ, arg->dim_size);
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cmsPipelineInsertStage(DToB0, cmsAT_END, stage);
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cmsWriteTag(hRGB, cmsSigDToB0Tag, DToB0);
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cmsLinkTag(hRGB, cmsSigDToB1Tag, cmsSigDToB0Tag);
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cmsLinkTag(hRGB, cmsSigDToB2Tag, cmsSigDToB0Tag);
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cmsLinkTag(hRGB, cmsSigDToB3Tag, cmsSigDToB0Tag);
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roundtrip_verification(DToB0, BToD0, arg->clut_roundtrip_tolerance);
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cmsPipelineFree(BToD0);
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cmsPipelineFree(DToB0);
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cmsStageFree(stage_eotf);
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cmsStageFree(stage_inv_eotf);
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return hRGB;
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}
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static cmsHPROFILE
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build_lcms_matrix_shaper_profile_output(cmsContext context_id,
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const struct lcms_pipeline *pipeline)
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{
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cmsToneCurve *arr_curves[3];
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cmsHPROFILE hRGB;
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int type_inverse_tone_curve;
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double inverse_tone_curve_param[5];
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assert(find_tone_curve_type(pipeline->post_fn, &type_inverse_tone_curve,
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inverse_tone_curve_param));
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/*
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* We are creating output profile and therefore we can use the following:
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* calling semantics:
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* cmsBuildParametricToneCurve(type_inverse_tone_curve, inverse_tone_curve_param)
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* The function find_tone_curve_type sets the type of curve positive if it
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* is tone curve and negative if it is inverse. When we create an ICC
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* profile we should use a tone curve, the inversion is done by LCMS
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* when the profile is used for output.
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*/
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arr_curves[0] = arr_curves[1] = arr_curves[2] =
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cmsBuildParametricToneCurve(context_id,
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(-1) * type_inverse_tone_curve,
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inverse_tone_curve_param);
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assert(arr_curves[0]);
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hRGB = cmsCreateRGBProfileTHR(context_id, &wp_d65,
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&pipeline->prim_output, arr_curves);
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assert(hRGB);
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cmsFreeToneCurve(arr_curves[0]);
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return hRGB;
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}
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static cmsHPROFILE
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build_lcms_profile_output(cmsContext context_id, const struct setup_args *arg)
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{
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switch (arg->type) {
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case PTYPE_MATRIX_SHAPER:
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return build_lcms_matrix_shaper_profile_output(context_id,
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arg->pipeline);
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case PTYPE_CLUT:
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return build_lcms_clut_profile_output(context_id, arg);
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}
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return NULL;
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}
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static char *
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build_output_icc_profile(const struct setup_args *arg)
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{
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char *profile_name = NULL;
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cmsHPROFILE profile = NULL;
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char *wd;
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int ret;
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bool saved;
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wd = realpath(".", NULL);
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assert(wd);
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if (arg->type == PTYPE_MATRIX_SHAPER)
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ret = asprintf(&profile_name, "%s/matrix-shaper-test-%s.icm", wd,
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arg->pipeline->color_space);
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else
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ret = asprintf(&profile_name, "%s/cLUT-test-%s.icm", wd,
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arg->pipeline->color_space);
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assert(ret > 0);
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profile = build_lcms_profile_output(NULL, arg);
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assert(profile);
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saved = cmsSaveProfileToFile(profile, profile_name);
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assert(saved);
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cmsCloseProfile(profile);
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free(wd);
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return profile_name;
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}
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static void
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test_lcms_error_logger(cmsContext context_id,
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cmsUInt32Number error_code,
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const char *text)
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{
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testlog("LittleCMS error: %s\n", text);
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}
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static enum test_result_code
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fixture_setup(struct weston_test_harness *harness, const struct setup_args *arg)
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{
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struct compositor_setup setup;
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char *file_name;
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cmsSetLogErrorHandler(test_lcms_error_logger);
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compositor_setup_defaults(&setup);
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setup.renderer = RENDERER_GL;
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setup.backend = WESTON_BACKEND_HEADLESS;
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setup.width = WINDOW_WIDTH;
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setup.height = WINDOW_HEIGHT;
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setup.shell = SHELL_TEST_DESKTOP;
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file_name = build_output_icc_profile(arg);
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if (!file_name)
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return RESULT_HARD_ERROR;
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weston_ini_setup(&setup,
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cfgln("[core]"),
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cfgln("output-decorations=true"),
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cfgln("color-management=true"),
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cfgln("[output]"),
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cfgln("name=headless"),
|
|
cfgln("icc_profile=%s", file_name));
|
|
|
|
free(file_name);
|
|
|
|
return weston_test_harness_execute_as_client(harness, &setup);
|
|
}
|
|
DECLARE_FIXTURE_SETUP_WITH_ARG(fixture_setup, my_setup_args, meta);
|
|
|
|
static void
|
|
gen_ramp_rgb(pixman_image_t *image, int bitwidth, int width_bar)
|
|
{
|
|
static const int hue[][COLOR_CHAN_NUM] = {
|
|
{ 1, 1, 1 }, /* White */
|
|
{ 1, 1, 0 }, /* Yellow */
|
|
{ 0, 1, 1 }, /* Cyan */
|
|
{ 0, 1, 0 }, /* Green */
|
|
{ 1, 0, 1 }, /* Magenta */
|
|
{ 1, 0, 0 }, /* Red */
|
|
{ 0, 0, 1 }, /* Blue */
|
|
};
|
|
const int num_hues = ARRAY_LENGTH(hue);
|
|
|
|
struct image_header ih = image_header_from(image);
|
|
float val_max;
|
|
int x, y;
|
|
int hue_index;
|
|
int chan;
|
|
float value;
|
|
unsigned char r, g, b;
|
|
uint32_t *pixel;
|
|
|
|
float n_steps = width_bar - 1;
|
|
|
|
val_max = (1 << bitwidth) - 1;
|
|
|
|
for (y = 0; y < ih.height; y++) {
|
|
hue_index = (y * num_hues) / (ih.height - 1);
|
|
hue_index = MIN(hue_index, num_hues - 1);
|
|
|
|
pixel = image_header_get_row_u32(&ih, y);
|
|
for (x = 0; x < ih.width; x++, pixel++) {
|
|
struct color_float rgb = { .rgb = { 0, 0, 0 } };
|
|
|
|
value = (float)x / (float)(ih.width - 1);
|
|
|
|
if (width_bar > 1)
|
|
value = floor(value * n_steps) / n_steps;
|
|
|
|
for (chan = 0; chan < COLOR_CHAN_NUM; chan++) {
|
|
if (hue[hue_index][chan])
|
|
rgb.rgb[chan] = value;
|
|
}
|
|
|
|
sRGB_delinearize(&rgb);
|
|
|
|
r = round(rgb.r * val_max);
|
|
g = round(rgb.g * val_max);
|
|
b = round(rgb.b * val_max);
|
|
|
|
*pixel = (255U << 24) | (r << 16) | (g << 8) | b;
|
|
}
|
|
}
|
|
}
|
|
|
|
static bool
|
|
process_pipeline_comparison(const struct buffer *src_buf,
|
|
const struct buffer *shot_buf,
|
|
const struct setup_args * arg)
|
|
{
|
|
FILE *dump = NULL;
|
|
#if 0
|
|
/*
|
|
* This file can be loaded in Octave for visualization. Find the script
|
|
* in tests/visualization/weston_plot_rgb_diff_stat.m and call it with
|
|
*
|
|
* weston_plot_rgb_diff_stat('opaque_pixel_conversion-f05-dump.txt')
|
|
*/
|
|
dump = fopen_dump_file(arg->meta.name);
|
|
#endif
|
|
|
|
struct image_header ih_src = image_header_from(src_buf->image);
|
|
struct image_header ih_shot = image_header_from(shot_buf->image);
|
|
int y, x;
|
|
struct color_float pix_src;
|
|
struct color_float pix_src_pipeline;
|
|
struct color_float pix_shot;
|
|
struct rgb_diff_stat diffstat = { .dump = dump };
|
|
bool ok;
|
|
|
|
/* no point to compare different images */
|
|
assert(ih_src.width == ih_shot.width);
|
|
assert(ih_src.height == ih_shot.height);
|
|
|
|
for (y = 0; y < ih_src.height; y++) {
|
|
uint32_t *row_ptr = image_header_get_row_u32(&ih_src, y);
|
|
uint32_t *row_ptr_shot = image_header_get_row_u32(&ih_shot, y);
|
|
|
|
for (x = 0; x < ih_src.width; x++) {
|
|
pix_src = a8r8g8b8_to_float(row_ptr[x]);
|
|
pix_shot = a8r8g8b8_to_float(row_ptr_shot[x]);
|
|
|
|
process_pixel_using_pipeline(arg->pipeline->pre_fn,
|
|
&arg->pipeline->mat,
|
|
arg->pipeline->post_fn,
|
|
&pix_src, &pix_src_pipeline);
|
|
|
|
rgb_diff_stat_update(&diffstat,
|
|
&pix_src_pipeline, &pix_shot,
|
|
&pix_src);
|
|
}
|
|
}
|
|
|
|
ok = diffstat.two_norm.max <= arg->tolerance / 255.0f;
|
|
|
|
testlog("%s %s %s tolerance %f %s\n", __func__,
|
|
ok ? "SUCCESS" : "FAILURE",
|
|
arg->meta.name, arg->tolerance,
|
|
arg->type == PTYPE_MATRIX_SHAPER ? "matrix-shaper" : "cLUT");
|
|
|
|
rgb_diff_stat_print(&diffstat, __func__, 8);
|
|
|
|
if (dump)
|
|
fclose(dump);
|
|
|
|
return ok;
|
|
}
|
|
|
|
/*
|
|
* Test that opaque client pixels produce the expected output when converted
|
|
* from the implicit sRGB input to ICC profile described output.
|
|
*
|
|
* The groundtruth conversion comes from the struct lcms_pipeline definitions.
|
|
* The first error source is converting those to ICC files. The second error
|
|
* source is Weston.
|
|
*
|
|
* This tests particularly the chain of input-to-blend followed by
|
|
* blend-to-output categories of color transformations.
|
|
*/
|
|
TEST(opaque_pixel_conversion)
|
|
{
|
|
int seq_no = get_test_fixture_index();
|
|
const struct setup_args *arg = &my_setup_args[seq_no];
|
|
const int width = WINDOW_WIDTH;
|
|
const int height = WINDOW_HEIGHT;
|
|
const int bitwidth = 8;
|
|
const int width_bar = 32;
|
|
|
|
struct client *client;
|
|
struct buffer *buf;
|
|
struct buffer *shot;
|
|
struct wl_surface *surface;
|
|
bool match;
|
|
|
|
client = create_client_and_test_surface(0, 0, width, height);
|
|
assert(client);
|
|
surface = client->surface->wl_surface;
|
|
|
|
buf = create_shm_buffer_a8r8g8b8(client, width, height);
|
|
gen_ramp_rgb(buf->image, bitwidth, width_bar);
|
|
|
|
wl_surface_attach(surface, buf->proxy, 0, 0);
|
|
wl_surface_damage(surface, 0, 0, width, height);
|
|
wl_surface_commit(surface);
|
|
|
|
shot = capture_screenshot_of_output(client);
|
|
assert(shot);
|
|
|
|
match = verify_image(shot->image, "shaper_matrix", arg->ref_image_index,
|
|
NULL, seq_no);
|
|
assert(process_pipeline_comparison(buf, shot, arg));
|
|
assert(match);
|
|
buffer_destroy(shot);
|
|
buffer_destroy(buf);
|
|
client_destroy(client);
|
|
}
|
|
|
|
static struct color_float
|
|
convert_to_blending_space(const struct lcms_pipeline *pip,
|
|
struct color_float cf)
|
|
{
|
|
/* Blending space is the linearized output space,
|
|
* or simply output space without the non-linear encoding
|
|
*/
|
|
cf = color_float_apply_curve(pip->pre_fn, cf);
|
|
return color_float_apply_matrix(&pip->mat, cf);
|
|
}
|
|
|
|
static void
|
|
compare_blend(const struct lcms_pipeline *pip,
|
|
struct color_float bg,
|
|
struct color_float fg,
|
|
const struct color_float *shot,
|
|
struct rgb_diff_stat *diffstat)
|
|
{
|
|
struct color_float ref;
|
|
unsigned i;
|
|
|
|
/* convert sources to straight alpha */
|
|
assert(bg.a == 1.0f);
|
|
fg = color_float_unpremult(fg);
|
|
|
|
bg = convert_to_blending_space(pip, bg);
|
|
fg = convert_to_blending_space(pip, fg);
|
|
|
|
/* blend */
|
|
for (i = 0; i < COLOR_CHAN_NUM; i++)
|
|
ref.rgb[i] = (1.0f - fg.a) * bg.rgb[i] + fg.a * fg.rgb[i];
|
|
|
|
/* non-linear encoding for output */
|
|
ref = color_float_apply_curve(pip->post_fn, ref);
|
|
|
|
rgb_diff_stat_update(diffstat, &ref, shot, &fg);
|
|
}
|
|
|
|
/* Alpha blending test pattern parameters */
|
|
static const int ALPHA_STEPS = 256;
|
|
static const int BLOCK_WIDTH = 1;
|
|
|
|
static void *
|
|
get_middle_row(struct buffer *buf)
|
|
{
|
|
struct image_header ih = image_header_from(buf->image);
|
|
|
|
assert(ih.width >= BLOCK_WIDTH * ALPHA_STEPS);
|
|
assert(ih.height >= BLOCK_WIDTH);
|
|
|
|
return image_header_get_row_u32(&ih, (BLOCK_WIDTH - 1) / 2);
|
|
}
|
|
|
|
static bool
|
|
check_blend_pattern(struct buffer *bg_buf,
|
|
struct buffer *fg_buf,
|
|
struct buffer *shot_buf,
|
|
const struct setup_args *arg)
|
|
{
|
|
FILE *dump = NULL;
|
|
#if 0
|
|
/*
|
|
* This file can be loaded in Octave for visualization. Find the script
|
|
* in tests/visualization/weston_plot_rgb_diff_stat.m and call it with
|
|
*
|
|
* weston_plot_rgb_diff_stat('output_icc_alpha_blend-f01-dump.txt', 255, 8)
|
|
*/
|
|
dump = fopen_dump_file(arg->meta.name);
|
|
#endif
|
|
|
|
uint32_t *bg_row = get_middle_row(bg_buf);
|
|
uint32_t *fg_row = get_middle_row(fg_buf);
|
|
uint32_t *shot_row = get_middle_row(shot_buf);
|
|
struct rgb_diff_stat diffstat = { .dump = dump };
|
|
int x;
|
|
|
|
for (x = 0; x < BLOCK_WIDTH * ALPHA_STEPS; x++) {
|
|
struct color_float bg = a8r8g8b8_to_float(bg_row[x]);
|
|
struct color_float fg = a8r8g8b8_to_float(fg_row[x]);
|
|
struct color_float shot = a8r8g8b8_to_float(shot_row[x]);
|
|
|
|
compare_blend(arg->pipeline, bg, fg, &shot, &diffstat);
|
|
}
|
|
|
|
rgb_diff_stat_print(&diffstat, "Blending", 8);
|
|
|
|
if (dump)
|
|
fclose(dump);
|
|
|
|
/* Test success condition: */
|
|
return diffstat.two_norm.max < 1.5f / 255.0f;
|
|
}
|
|
|
|
static uint32_t
|
|
premult_color(uint32_t a, uint32_t r, uint32_t g, uint32_t b)
|
|
{
|
|
uint32_t c = 0;
|
|
|
|
c |= a << 24;
|
|
c |= (a * r / 255) << 16;
|
|
c |= (a * g / 255) << 8;
|
|
c |= a * b / 255;
|
|
|
|
return c;
|
|
}
|
|
|
|
static void
|
|
fill_alpha_pattern(struct buffer *buf)
|
|
{
|
|
struct image_header ih = image_header_from(buf->image);
|
|
int y;
|
|
|
|
assert(ih.pixman_format == PIXMAN_a8r8g8b8);
|
|
assert(ih.width == BLOCK_WIDTH * ALPHA_STEPS);
|
|
|
|
for (y = 0; y < ih.height; y++) {
|
|
uint32_t *row = image_header_get_row_u32(&ih, y);
|
|
uint32_t step;
|
|
|
|
for (step = 0; step < (uint32_t)ALPHA_STEPS; step++) {
|
|
uint32_t alpha = step * 255 / (ALPHA_STEPS - 1);
|
|
uint32_t color;
|
|
int i;
|
|
|
|
color = premult_color(alpha, 0, 255 - alpha, 255);
|
|
for (i = 0; i < BLOCK_WIDTH; i++)
|
|
*row++ = color;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Test that alpha blending is correct when an output ICC profile is installed.
|
|
*
|
|
* The background is a constant color. On top of that, there is an
|
|
* alpha-blended gradient with ramps in both alpha and color. Sub-surface
|
|
* ensures the correct positioning and stacking.
|
|
*
|
|
* The gradient consists of ALPHA_STEPS number of blocks. Block size is
|
|
* BLOCK_WIDTH x BLOCK_WIDTH and a block has a uniform color.
|
|
*
|
|
* In the blending result over x axis:
|
|
* - red goes from 1.0 to 0.0, monotonic
|
|
* - green is not monotonic
|
|
* - blue goes from 0.0 to 1.0, monotonic
|
|
*
|
|
* The test has sRGB encoded input pixels (non-linear). These are converted to
|
|
* linear light (optical) values in output color space, blended, and converted
|
|
* to non-linear (electrical) values according to the output ICC profile.
|
|
*
|
|
* Specifically, this test exercises the linearization of output ICC profiles,
|
|
* retrieve_eotf_and_output_inv_eotf().
|
|
*/
|
|
TEST(output_icc_alpha_blend)
|
|
{
|
|
const int width = BLOCK_WIDTH * ALPHA_STEPS;
|
|
const int height = BLOCK_WIDTH;
|
|
const pixman_color_t background_color = {
|
|
.red = 0xffff,
|
|
.green = 0x8080,
|
|
.blue = 0x0000,
|
|
.alpha = 0xffff
|
|
};
|
|
int seq_no = get_test_fixture_index();
|
|
const struct setup_args *arg = &my_setup_args[seq_no];
|
|
struct client *client;
|
|
struct buffer *bg;
|
|
struct buffer *fg;
|
|
struct wl_subcompositor *subco;
|
|
struct wl_surface *surf;
|
|
struct wl_subsurface *sub;
|
|
struct buffer *shot;
|
|
bool match;
|
|
|
|
client = create_client();
|
|
subco = bind_to_singleton_global(client, &wl_subcompositor_interface, 1);
|
|
|
|
/* background window content */
|
|
bg = create_shm_buffer_a8r8g8b8(client, width, height);
|
|
fill_image_with_color(bg->image, &background_color);
|
|
|
|
/* background window, main surface */
|
|
client->surface = create_test_surface(client);
|
|
client->surface->width = width;
|
|
client->surface->height = height;
|
|
client->surface->buffer = bg; /* pass ownership */
|
|
surface_set_opaque_rect(client->surface,
|
|
&(struct rectangle){ 0, 0, width, height });
|
|
|
|
/* foreground blended content */
|
|
fg = create_shm_buffer_a8r8g8b8(client, width, height);
|
|
fill_alpha_pattern(fg);
|
|
|
|
/* foreground window, sub-surface */
|
|
surf = wl_compositor_create_surface(client->wl_compositor);
|
|
sub = wl_subcompositor_get_subsurface(subco, surf, client->surface->wl_surface);
|
|
/* sub-surface defaults to position 0, 0, top-most, synchronized */
|
|
wl_surface_attach(surf, fg->proxy, 0, 0);
|
|
wl_surface_damage(surf, 0, 0, width, height);
|
|
wl_surface_commit(surf);
|
|
|
|
/* attach, damage, commit background window */
|
|
move_client(client, 0, 0);
|
|
|
|
shot = capture_screenshot_of_output(client);
|
|
assert(shot);
|
|
match = verify_image(shot->image, "output_icc_alpha_blend", arg->ref_image_index,
|
|
NULL, seq_no);
|
|
assert(check_blend_pattern(bg, fg, shot, arg));
|
|
assert(match);
|
|
|
|
buffer_destroy(shot);
|
|
|
|
wl_subsurface_destroy(sub);
|
|
wl_surface_destroy(surf);
|
|
buffer_destroy(fg);
|
|
wl_subcompositor_destroy(subco);
|
|
client_destroy(client); /* destroys bg */
|
|
}
|
|
|
|
/*
|
|
* Test that output decorations have the expected colors.
|
|
*
|
|
* This is the only way to test input-to-output category of color
|
|
* transformations. They are used only for output decorations and some other
|
|
* debug-like features. The input color space is hardcoded to sRGB in the
|
|
* compositor.
|
|
*
|
|
* Because the output decorations are drawn with Cairo, we do not have an
|
|
* easy access to the ground-truth image and so do not check the results
|
|
* against a reference formula.
|
|
*/
|
|
TEST(output_icc_decorations)
|
|
{
|
|
int seq_no = get_test_fixture_index();
|
|
const struct setup_args *arg = &my_setup_args[seq_no];
|
|
struct client *client;
|
|
struct buffer *shot;
|
|
pixman_image_t *img;
|
|
bool match;
|
|
|
|
client = create_client();
|
|
|
|
shot = client_capture_output(client, client->output,
|
|
WESTON_CAPTURE_V1_SOURCE_FULL_FRAMEBUFFER);
|
|
img = image_convert_to_a8r8g8b8(shot->image);
|
|
|
|
match = verify_image(img, "output-icc-decorations",
|
|
arg->ref_image_index, NULL, seq_no);
|
|
assert(match);
|
|
|
|
pixman_image_unref(img);
|
|
buffer_destroy(shot);
|
|
client_destroy(client);
|
|
}
|