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// license:BSD-3-Clause
// copyright-holders:Vas Crabb, Ryan Holtz
/***************************************************************************
rgbgen.cpp
General RGB utilities.
***************************************************************************/
#include "emu.h"
#if ((defined(MAME_DEBUG) && !defined(__OPTIMIZE__)) || (!defined(__SSE2__) && (!defined(_M_IX86_FP) || (_M_IX86_FP < 2)))) && !defined(__ALTIVEC__)
#include "rgbgen.h"
/***************************************************************************
HIGHER LEVEL OPERATIONS
***************************************************************************/
/*-------------------------------------------------
rgbaint_blend - blend two colors by the given
scale factor
-------------------------------------------------*/
void rgbaint_t::blend(const rgbaint_t& color2, u8 color1scale)
{
s32 scale1 = s32(color1scale);
s32 scale2 = 256 - scale1;
m_a = (m_a * scale1 + color2.m_a * scale2) >> 8;
m_r = (m_r * scale1 + color2.m_r * scale2) >> 8;
m_g = (m_g * scale1 + color2.m_g * scale2) >> 8;
m_b = (m_b * scale1 + color2.m_b * scale2) >> 8;
m_a |= (m_a & 0x00800000) ? 0xff000000 : 0;
m_r |= (m_r & 0x00800000) ? 0xff000000 : 0;
m_g |= (m_g & 0x00800000) ? 0xff000000 : 0;
m_b |= (m_b & 0x00800000) ? 0xff000000 : 0;
}
/*-------------------------------------------------
rgbaint_scale_and_clamp - scale the given
color by an 8.8 scale factor, immediate or
per channel, and clamp to byte values
-------------------------------------------------*/
void rgbaint_t::scale_imm_and_clamp(s32 scale)
{
m_a = (m_a * scale) >> 8;
m_r = (m_r * scale) >> 8;
m_g = (m_g * scale) >> 8;
m_b = (m_b * scale) >> 8;
m_a |= (m_a & 0x00800000) ? 0xff000000 : 0;
m_r |= (m_r & 0x00800000) ? 0xff000000 : 0;
m_g |= (m_g & 0x00800000) ? 0xff000000 : 0;
m_b |= (m_b & 0x00800000) ? 0xff000000 : 0;
if (u32(m_a) > 255) { m_a = (m_a < 0) ? 0 : 255; }
if (u32(m_r) > 255) { m_r = (m_r < 0) ? 0 : 255; }
if (u32(m_g) > 255) { m_g = (m_g < 0) ? 0 : 255; }
if (u32(m_b) > 255) { m_b = (m_b < 0) ? 0 : 255; }
}
void rgbaint_t::scale_and_clamp(const rgbaint_t& scale)
{
m_a = (m_a * scale.m_a) >> 8;
m_r = (m_r * scale.m_r) >> 8;
m_g = (m_g * scale.m_g) >> 8;
m_b = (m_b * scale.m_b) >> 8;
m_a |= (m_a & 0x00800000) ? 0xff000000 : 0;
m_r |= (m_r & 0x00800000) ? 0xff000000 : 0;
m_g |= (m_g & 0x00800000) ? 0xff000000 : 0;
m_b |= (m_b & 0x00800000) ? 0xff000000 : 0;
if (u32(m_a) > 255) { m_a = (m_a < 0) ? 0 : 255; }
if (u32(m_r) > 255) { m_r = (m_r < 0) ? 0 : 255; }
if (u32(m_g) > 255) { m_g = (m_g < 0) ? 0 : 255; }
if (u32(m_b) > 255) { m_b = (m_b < 0) ? 0 : 255; }
}
void rgbaint_t::scale_add_and_clamp(const rgbaint_t& scale, const rgbaint_t& other)
{
m_a = (m_a * scale.m_a) >> 8;
m_r = (m_r * scale.m_r) >> 8;
m_g = (m_g * scale.m_g) >> 8;
m_b = (m_b * scale.m_b) >> 8;
m_a |= (m_a & 0x00800000) ? 0xff000000 : 0;
m_r |= (m_r & 0x00800000) ? 0xff000000 : 0;
m_g |= (m_g & 0x00800000) ? 0xff000000 : 0;
m_b |= (m_b & 0x00800000) ? 0xff000000 : 0;
m_a += other.m_a;
m_r += other.m_r;
m_g += other.m_g;
m_b += other.m_b;
if (u32(m_a) > 255) { m_a = (m_a < 0) ? 0 : 255; }
if (u32(m_r) > 255) { m_r = (m_r < 0) ? 0 : 255; }
if (u32(m_g) > 255) { m_g = (m_g < 0) ? 0 : 255; }
if (u32(m_b) > 255) { m_b = (m_b < 0) ? 0 : 255; }
}
void rgbaint_t::scale2_add_and_clamp(const rgbaint_t& scale, const rgbaint_t& other, const rgbaint_t& scale2)
{
m_a = (m_a * scale.m_a + other.m_a * scale2.m_a) >> 8;
m_r = (m_r * scale.m_r + other.m_r * scale2.m_r) >> 8;
m_g = (m_g * scale.m_g + other.m_g * scale2.m_g) >> 8;
m_b = (m_b * scale.m_b + other.m_b * scale2.m_b) >> 8;
m_a |= (m_a & 0x00800000) ? 0xff000000 : 0;
m_r |= (m_r & 0x00800000) ? 0xff000000 : 0;
m_g |= (m_g & 0x00800000) ? 0xff000000 : 0;
m_b |= (m_b & 0x00800000) ? 0xff000000 : 0;
if (u32(m_a) > 255) { m_a = (m_a < 0) ? 0 : 255; }
if (u32(m_r) > 255) { m_r = (m_r < 0) ? 0 : 255; }
if (u32(m_g) > 255) { m_g = (m_g < 0) ? 0 : 255; }
if (u32(m_b) > 255) { m_b = (m_b < 0) ? 0 : 255; }
}
#endif // ((defined(MAME_DEBUG) && !defined(__OPTIMIZE__)) || (!defined(__SSE2__) && (!defined(_M_IX86_FP) || (_M_IX86_FP < 2)))) && !defined(__ALTIVEC__)
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