// 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__) && (_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(__ALTIVEC__)