bb
157c6af18e
Avoid cases of filenames Update years in terms and other legal(ish) documents Don't update years in license headers, since change is not meaningful Will add linter rule in seperate commit Happy recompiling everyone! Original Patch By: Nescio Comment By: Gallaecio Differential Revision: D2620 This was SVN commit r27786.
99 lines
2.9 KiB
C
99 lines
2.9 KiB
C
/* Copyright (C) 2022 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef INCLUDED_COLOR
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#define INCLUDED_COLOR
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#include "graphics/SColor.h"
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#include "maths/Vector3D.h"
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#include "maths/Vector4D.h"
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#include "ps/containers/Span.h"
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#include "ps/CStrForward.h"
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// Simple defines for 3 and 4 component floating point colors - just map to
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// corresponding vector types.
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typedef CVector3D RGBColor;
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typedef CVector4D RGBAColor;
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// Convert float RGB(A) colors to unsigned byte.
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// Exposed as function pointer because it is set at init-time to
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// one of several implementations depending on CPU caps.
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extern SColor4ub (*ConvertRGBColorTo4ub)(const RGBColor& src);
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/**
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* Detects CPU caps and activates the best possible codepath.
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*/
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extern void ColorActivateFastImpl();
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struct CColor
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{
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CColor() : r(-1.f), g(-1.f), b(-1.f), a(1.f) {}
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CColor(float cr, float cg, float cb, float ca) : r(cr), g(cg), b(cb), a(ca) {}
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/**
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* Returns whether this has been set to a valid color.
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*/
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operator bool() const
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{
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return r >= 0 && g >= 0 && b >= 0 && a >= 0;
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}
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/**
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* Try to parse @p Value as a color. Returns true on success, false otherwise.
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* Leaves the color unchanged if it failed.
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* @param value Should be "r g b" or "r g b a" where each value is an integer in [0,255].
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* @param defaultAlpha The alpha value that is used if the format of @p Value is "r g b".
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*/
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bool ParseString(const CStr8& value, int defaultAlpha = 255);
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bool operator==(const CColor& color) const;
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bool operator!=(const CColor& color) const
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{
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return !(*this == color);
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}
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// For passing to uniform as vec3/vec4.
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PS::span<const float> AsFloatArray() const
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{
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// Additional check to prevent a weird compiler has a different
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// alignement for an array and a class members.
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static_assert(
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sizeof(CColor) == sizeof(float) * 4u &&
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offsetof(CColor, r) == 0 &&
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offsetof(CColor, g) == sizeof(float) &&
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offsetof(CColor, b) == sizeof(float) * 2u &&
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offsetof(CColor, a) == sizeof(float) * 3u,
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"CColor should be properly layouted to use AsFloatArray");
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return PS::span(&r, 4);
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}
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// For passing to CRenderer:
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SColor4ub AsSColor4ub() const
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{
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return SColor4ub(
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static_cast<u8>(r * 255.f),
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static_cast<u8>(g * 255.f),
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static_cast<u8>(b * 255.f),
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static_cast<u8>(a * 255.f)
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);
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}
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float r, g, b, a;
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};
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#endif // INCLUDED_COLOR
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