forked from mia/Aegisub
118 lines
4.2 KiB
C++
118 lines
4.2 KiB
C++
// Copyright (c) 2009-2010, Niels Martin Hansen
|
|
// All rights reserved.
|
|
//
|
|
// Redistribution and use in source and binary forms, with or without
|
|
// modification, are permitted provided that the following conditions are met:
|
|
//
|
|
// * Redistributions of source code must retain the above copyright notice,
|
|
// this list of conditions and the following disclaimer.
|
|
// * Redistributions in binary form must reproduce the above copyright notice,
|
|
// this list of conditions and the following disclaimer in the documentation
|
|
// and/or other materials provided with the distribution.
|
|
// * Neither the name of the Aegisub Group nor the names of its contributors
|
|
// may be used to endorse or promote products derived from this software
|
|
// without specific prior written permission.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
// POSSIBILITY OF SUCH DAMAGE.
|
|
//
|
|
// Aegisub Project http://www.aegisub.org/
|
|
//
|
|
// $Id$
|
|
|
|
/// @file audio_colorscheme.h
|
|
/// @see audio_colorscheme.cpp
|
|
/// @ingroup audio_ui
|
|
///
|
|
/// Manage colour schemes for the audio display
|
|
|
|
|
|
#ifndef AGI_PRE
|
|
#include <wx/colour.h>
|
|
#endif
|
|
|
|
|
|
/// @class AudioSpectrumColorMap
|
|
/// @brief Provides colour maps for audio display rendering
|
|
///
|
|
/// Maps values from floats in range 0..1 into RGB colour values.
|
|
///
|
|
/// First create an instance of this class, then call an initialisation function
|
|
/// in it to fill the palette with a colour map.
|
|
///
|
|
/// @todo Let consumers of this class specify their own palette generation function.
|
|
class AudioColorScheme {
|
|
/// The palette data for the map
|
|
unsigned char *palette;
|
|
|
|
/// Factor to multiply 0..1 values by to map them into the palette range
|
|
size_t factor;
|
|
|
|
public:
|
|
/// @brief Constructor
|
|
/// @param prec Bit precision to create the colour map with
|
|
///
|
|
/// Allocates the palette array to 2^prec entries
|
|
AudioColorScheme(int prec)
|
|
: palette(new unsigned char[(4<<prec) + 4])
|
|
, factor(1<<prec)
|
|
{
|
|
}
|
|
|
|
/// @brief Destructor
|
|
///
|
|
/// De-allocates the palette array
|
|
~AudioColorScheme()
|
|
{
|
|
delete[] palette;
|
|
}
|
|
|
|
/// @brief Initialise the palette to the Aegisub 2.1 "Icy Blue" scheme (unselected)
|
|
void InitIcyBlue_Normal();
|
|
/// @brief Initialise the palette to the Aegisub 2.1 "Icy Blue" scheme (selected)
|
|
void InitIcyBlue_Selected();
|
|
|
|
/// @brief Map a floating point value to RGB
|
|
/// @param val [in] The value to map from
|
|
/// @param pixel [out] First byte of the pixel to write
|
|
///
|
|
/// Writes into the XRGB pixel (assumed 32 bit without alpha) passed.
|
|
/// The pixel format is assumed to be the same as that in the palette.
|
|
inline void map(float val, unsigned char *pixel)
|
|
{
|
|
if (val < 0.0) val = 0.0;
|
|
if (val > 1.0) val = 1.0;
|
|
// Find the colour in the palette
|
|
unsigned char *color = palette + ((int)(val*factor) * 4);
|
|
// Copy to the destination.
|
|
// Has to be done one byte at a time since we're writing RGB and not RGBX or RGBA
|
|
// data, and we otherwise write past the end of the pixel we're writing, possibly
|
|
// hitting adjacent memory blocks or just overwriting the start of the following
|
|
// scanline in the image.
|
|
// As the image is 24 bpp, 3 of every 4 uint32_t writes would be unaligned anyway.
|
|
pixel[0] = color[0];
|
|
pixel[1] = color[1];
|
|
pixel[2] = color[2];
|
|
}
|
|
|
|
/// @brief Get a floating point value's colour as a wxColour
|
|
/// @param val The value to map from
|
|
/// @return The corresponding wxColour
|
|
wxColour get(float val)
|
|
{
|
|
if (val < 0.0) val = 0.0;
|
|
if (val > 1.0) val = 1.0;
|
|
unsigned char *color = palette + ((int)(val*factor) * 4);
|
|
return wxColour(color[0], color[1], color[2]);
|
|
}
|
|
};
|
|
|