irrlicht/source/Irrlicht/CColorConverter.cpp

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// Copyright (C) 2002-2012 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h
#include "CColorConverter.h"
#include "SColor.h"
#include "os.h"
#include "irrString.h"
namespace irr
{
namespace video
{
//! converts a monochrome bitmap to A1R5G5B5 data
void CColorConverter::convert1BitTo16Bit(const u8 *in, s16 *out, s32 width, s32 height, s32 linepad, bool flip)
{
if (!in || !out)
return;
if (flip)
out += width * height;
for (s32 y = 0; y < height; ++y) {
s32 shift = 7;
if (flip)
out -= width;
for (s32 x = 0; x < width; ++x) {
out[x] = *in >> shift & 0x01 ? (s16)0xffff : (s16)0x8000;
2023-10-04 20:10:58 +02:00
if ((--shift) < 0) { // 8 pixel done
shift = 7;
++in;
}
}
if (shift != 7) // width did not fill last byte
++in;
if (!flip)
out += width;
in += linepad;
}
}
//! converts a 4 bit palettized image to A1R5G5B5
void CColorConverter::convert4BitTo16Bit(const u8 *in, s16 *out, s32 width, s32 height, const s32 *palette, s32 linepad, bool flip)
{
if (!in || !out || !palette)
return;
if (flip)
out += width * height;
for (s32 y = 0; y < height; ++y) {
s32 shift = 4;
if (flip)
out -= width;
for (s32 x = 0; x < width; ++x) {
out[x] = X8R8G8B8toA1R5G5B5(palette[(u8)((*in >> shift) & 0xf)]);
if (shift == 0) {
shift = 4;
++in;
} else
shift = 0;
}
if (shift == 0) // odd width
++in;
if (!flip)
out += width;
in += linepad;
}
}
//! converts a 8 bit palettized image into A1R5G5B5
void CColorConverter::convert8BitTo16Bit(const u8 *in, s16 *out, s32 width, s32 height, const s32 *palette, s32 linepad, bool flip)
{
if (!in || !out || !palette)
return;
if (flip)
out += width * height;
for (s32 y = 0; y < height; ++y) {
if (flip)
out -= width; // one line back
for (s32 x = 0; x < width; ++x) {
out[x] = X8R8G8B8toA1R5G5B5(palette[(u8)(*in)]);
++in;
}
if (!flip)
out += width;
in += linepad;
}
}
//! converts a 8 bit palettized or non palettized image (A8) into R8G8B8
void CColorConverter::convert8BitTo24Bit(const u8 *in, u8 *out, s32 width, s32 height, const u8 *palette, s32 linepad, bool flip)
{
if (!in || !out)
return;
const s32 lineWidth = 3 * width;
if (flip)
out += lineWidth * height;
for (s32 y = 0; y < height; ++y) {
if (flip)
out -= lineWidth; // one line back
for (s32 x = 0; x < lineWidth; x += 3) {
if (palette) {
#ifdef __BIG_ENDIAN__
out[x + 0] = palette[(in[0] << 2) + 0];
out[x + 1] = palette[(in[0] << 2) + 1];
out[x + 2] = palette[(in[0] << 2) + 2];
#else
out[x + 0] = palette[(in[0] << 2) + 2];
out[x + 1] = palette[(in[0] << 2) + 1];
out[x + 2] = palette[(in[0] << 2) + 0];
#endif
} else {
out[x + 0] = in[0];
out[x + 1] = in[0];
out[x + 2] = in[0];
}
++in;
}
if (!flip)
out += lineWidth;
in += linepad;
}
}
//! converts a 8 bit palettized or non palettized image (A8) into R8G8B8
void CColorConverter::convert8BitTo32Bit(const u8 *in, u8 *out, s32 width, s32 height, const u8 *palette, s32 linepad, bool flip)
{
if (!in || !out)
return;
const u32 lineWidth = 4 * width;
if (flip)
out += lineWidth * height;
u32 x;
u32 c;
for (u32 y = 0; y < (u32)height; ++y) {
if (flip)
out -= lineWidth; // one line back
if (palette) {
for (x = 0; x < (u32)width; x += 1) {
c = in[x];
((u32 *)out)[x] = ((u32 *)palette)[c];
}
} else {
for (x = 0; x < (u32)width; x += 1) {
c = in[x];
#ifdef __BIG_ENDIAN__
((u32 *)out)[x] = c << 24 | c << 16 | c << 8 | 0x000000FF;
#else
((u32 *)out)[x] = 0xFF000000 | c << 16 | c << 8 | c;
#endif
}
}
if (!flip)
out += lineWidth;
in += width + linepad;
}
}
//! converts 16bit data to 16bit data
void CColorConverter::convert16BitTo16Bit(const s16 *in, s16 *out, s32 width, s32 height, s32 linepad, bool flip)
{
if (!in || !out)
return;
if (flip)
out += width * height;
for (s32 y = 0; y < height; ++y) {
if (flip)
out -= width;
#ifdef __BIG_ENDIAN__
for (s32 x = 0; x < width; ++x)
out[x] = os::Byteswap::byteswap(in[x]);
#else
memcpy(out, in, width * sizeof(s16));
#endif
if (!flip)
out += width;
in += width;
in += linepad;
}
}
//! copies R8G8B8 24bit data to 24bit data
void CColorConverter::convert24BitTo24Bit(const u8 *in, u8 *out, s32 width, s32 height, s32 linepad, bool flip, bool bgr)
{
if (!in || !out)
return;
const s32 lineWidth = 3 * width;
if (flip)
out += lineWidth * height;
for (s32 y = 0; y < height; ++y) {
if (flip)
out -= lineWidth;
if (bgr) {
for (s32 x = 0; x < lineWidth; x += 3) {
out[x + 0] = in[x + 2];
out[x + 1] = in[x + 1];
out[x + 2] = in[x + 0];
}
} else {
memcpy(out, in, lineWidth);
}
if (!flip)
out += lineWidth;
in += lineWidth;
in += linepad;
}
}
//! Resizes the surface to a new size and converts it at the same time
//! to an A8R8G8B8 format, returning the pointer to the new buffer.
void CColorConverter::convert16bitToA8R8G8B8andResize(const s16 *in, s32 *out, s32 newWidth, s32 newHeight, s32 currentWidth, s32 currentHeight)
{
if (!newWidth || !newHeight)
return;
// note: this is very very slow. (i didn't want to write a fast version.
// but hopefully, nobody wants to convert surfaces every frame.
f32 sourceXStep = (f32)currentWidth / (f32)newWidth;
f32 sourceYStep = (f32)currentHeight / (f32)newHeight;
f32 sy;
s32 t;
for (s32 x = 0; x < newWidth; ++x) {
sy = 0.0f;
for (s32 y = 0; y < newHeight; ++y) {
t = in[(s32)(((s32)sy) * currentWidth + x * sourceXStep)];
t = (((t >> 15) & 0x1) << 31) | (((t >> 10) & 0x1F) << 19) |
(((t >> 5) & 0x1F) << 11) | (t & 0x1F) << 3;
out[(s32)(y * newWidth + x)] = t;
sy += sourceYStep;
}
}
}
//! copies X8R8G8B8 32 bit data
void CColorConverter::convert32BitTo32Bit(const s32 *in, s32 *out, s32 width, s32 height, s32 linepad, bool flip)
{
if (!in || !out)
return;
if (flip)
out += width * height;
for (s32 y = 0; y < height; ++y) {
if (flip)
out -= width;
#ifdef __BIG_ENDIAN__
for (s32 x = 0; x < width; ++x)
out[x] = os::Byteswap::byteswap(in[x]);
#else
memcpy(out, in, width * sizeof(s32));
#endif
if (!flip)
out += width;
in += width;
in += linepad;
}
}
void CColorConverter::convert_A1R5G5B5toR8G8B8(const void *sP, s32 sN, void *dP)
{
u16 *sB = (u16 *)sP;
u8 *dB = (u8 *)dP;
for (s32 x = 0; x < sN; ++x) {
dB[2] = (*sB & 0x7c00) >> 7;
dB[1] = (*sB & 0x03e0) >> 2;
dB[0] = (*sB & 0x1f) << 3;
sB += 1;
dB += 3;
}
}
void CColorConverter::convert_A1R5G5B5toB8G8R8(const void *sP, s32 sN, void *dP)
{
u16 *sB = (u16 *)sP;
u8 *dB = (u8 *)dP;
for (s32 x = 0; x < sN; ++x) {
dB[0] = (*sB & 0x7c00) >> 7;
dB[1] = (*sB & 0x03e0) >> 2;
dB[2] = (*sB & 0x1f) << 3;
sB += 1;
dB += 3;
}
}
void CColorConverter::convert_A1R5G5B5toR5G5B5A1(const void *sP, s32 sN, void *dP)
{
const u16 *sB = (const u16 *)sP;
u16 *dB = (u16 *)dP;
for (s32 x = 0; x < sN; ++x) {
*dB = (*sB << 1) | (*sB >> 15);
++sB;
++dB;
}
}
void CColorConverter::convert_A1R5G5B5toA8R8G8B8(const void *sP, s32 sN, void *dP)
{
u16 *sB = (u16 *)sP;
u32 *dB = (u32 *)dP;
for (s32 x = 0; x < sN; ++x)
*dB++ = A1R5G5B5toA8R8G8B8(*sB++);
}
void CColorConverter::convert_A1R5G5B5toA1R5G5B5(const void *sP, s32 sN, void *dP)
{
memcpy(dP, sP, sN * 2);
}
void CColorConverter::convert_A1R5G5B5toR5G6B5(const void *sP, s32 sN, void *dP)
{
u16 *sB = (u16 *)sP;
u16 *dB = (u16 *)dP;
for (s32 x = 0; x < sN; ++x)
*dB++ = A1R5G5B5toR5G6B5(*sB++);
}
void CColorConverter::convert_A8R8G8B8toR8G8B8(const void *sP, s32 sN, void *dP)
{
u8 *sB = (u8 *)sP;
u8 *dB = (u8 *)dP;
for (s32 x = 0; x < sN; ++x) {
// sB[3] is alpha
dB[0] = sB[2];
dB[1] = sB[1];
dB[2] = sB[0];
sB += 4;
dB += 3;
}
}
void CColorConverter::convert_A8R8G8B8toB8G8R8(const void *sP, s32 sN, void *dP)
{
u8 *sB = (u8 *)sP;
u8 *dB = (u8 *)dP;
for (s32 x = 0; x < sN; ++x) {
// sB[3] is alpha
dB[0] = sB[0];
dB[1] = sB[1];
dB[2] = sB[2];
sB += 4;
dB += 3;
}
}
void CColorConverter::convert_A8R8G8B8toA8R8G8B8(const void *sP, s32 sN, void *dP)
{
memcpy(dP, sP, sN * 4);
}
void CColorConverter::convert_A8R8G8B8toA1R5G5B5(const void *sP, s32 sN, void *dP)
{
u32 *sB = (u32 *)sP;
u16 *dB = (u16 *)dP;
for (s32 x = 0; x < sN; ++x)
*dB++ = A8R8G8B8toA1R5G5B5(*sB++);
}
void CColorConverter::convert_A8R8G8B8toA1B5G5R5(const void *sP, s32 sN, void *dP)
{
u8 *sB = (u8 *)sP;
u16 *dB = (u16 *)dP;
for (s32 x = 0; x < sN; ++x) {
s32 r = sB[0] >> 3;
s32 g = sB[1] >> 3;
s32 b = sB[2] >> 3;
s32 a = sB[3] >> 3;
dB[0] = (a << 15) | (r << 10) | (g << 5) | (b);
sB += 4;
dB += 1;
}
}
void CColorConverter::convert_A8R8G8B8toR5G6B5(const void *sP, s32 sN, void *dP)
{
u8 *sB = (u8 *)sP;
u16 *dB = (u16 *)dP;
for (s32 x = 0; x < sN; ++x) {
s32 r = sB[2] >> 3;
s32 g = sB[1] >> 2;
s32 b = sB[0] >> 3;
dB[0] = (r << 11) | (g << 5) | (b);
sB += 4;
dB += 1;
}
}
void CColorConverter::convert_A8R8G8B8toR3G3B2(const void *sP, s32 sN, void *dP)
{
u8 *sB = (u8 *)sP;
u8 *dB = (u8 *)dP;
for (s32 x = 0; x < sN; ++x) {
u8 r = sB[2] & 0xe0;
u8 g = (sB[1] & 0xe0) >> 3;
u8 b = (sB[0] & 0xc0) >> 6;
dB[0] = (r | g | b);
sB += 4;
dB += 1;
}
}
void CColorConverter::convert_R8G8B8toR8G8B8(const void *sP, s32 sN, void *dP)
{
memcpy(dP, sP, sN * 3);
}
void CColorConverter::convert_R8G8B8toA8R8G8B8(const void *sP, s32 sN, void *dP)
{
u8 *sB = (u8 *)sP;
u32 *dB = (u32 *)dP;
for (s32 x = 0; x < sN; ++x) {
*dB = 0xff000000 | (sB[0] << 16) | (sB[1] << 8) | sB[2];
sB += 3;
++dB;
}
}
void CColorConverter::convert_R8G8B8toA1R5G5B5(const void *sP, s32 sN, void *dP)
{
u8 *sB = (u8 *)sP;
u16 *dB = (u16 *)dP;
for (s32 x = 0; x < sN; ++x) {
s32 r = sB[0] >> 3;
s32 g = sB[1] >> 3;
s32 b = sB[2] >> 3;
dB[0] = (0x8000) | (r << 10) | (g << 5) | (b);
sB += 3;
dB += 1;
}
}
void CColorConverter::convert_B8G8R8toA8R8G8B8(const void *sP, s32 sN, void *dP)
{
u8 *sB = (u8 *)sP;
u32 *dB = (u32 *)dP;
for (s32 x = 0; x < sN; ++x) {
*dB = 0xff000000 | (sB[2] << 16) | (sB[1] << 8) | sB[0];
sB += 3;
++dB;
}
}
void CColorConverter::convert_A8R8G8B8toR8G8B8A8(const void *sP, s32 sN, void *dP)
{
const u32 *sB = (const u32 *)sP;
u32 *dB = (u32 *)dP;
for (s32 x = 0; x < sN; ++x) {
*dB++ = (*sB << 8) | (*sB >> 24);
++sB;
}
}
void CColorConverter::convert_A8R8G8B8toA8B8G8R8(const void *sP, s32 sN, void *dP)
{
const u32 *sB = (const u32 *)sP;
u32 *dB = (u32 *)dP;
for (s32 x = 0; x < sN; ++x) {
*dB++ = (*sB & 0xff00ff00) | ((*sB & 0x00ff0000) >> 16) | ((*sB & 0x000000ff) << 16);
++sB;
}
}
void CColorConverter::convert_B8G8R8A8toA8R8G8B8(const void *sP, s32 sN, void *dP)
{
u8 *sB = (u8 *)sP;
u8 *dB = (u8 *)dP;
for (s32 x = 0; x < sN; ++x) {
dB[0] = sB[3];
dB[1] = sB[2];
dB[2] = sB[1];
dB[3] = sB[0];
sB += 4;
dB += 4;
}
}
void CColorConverter::convert_R8G8B8toB8G8R8(const void *sP, s32 sN, void *dP)
{
u8 *sB = (u8 *)sP;
u8 *dB = (u8 *)dP;
for (s32 x = 0; x < sN; ++x) {
dB[2] = sB[0];
dB[1] = sB[1];
dB[0] = sB[2];
sB += 3;
dB += 3;
}
}
void CColorConverter::convert_R8G8B8toR5G6B5(const void *sP, s32 sN, void *dP)
{
u8 *sB = (u8 *)sP;
u16 *dB = (u16 *)dP;
for (s32 x = 0; x < sN; ++x) {
s32 r = sB[0] >> 3;
s32 g = sB[1] >> 2;
s32 b = sB[2] >> 3;
dB[0] = (r << 11) | (g << 5) | (b);
sB += 3;
dB += 1;
}
}
void CColorConverter::convert_R5G6B5toR5G6B5(const void *sP, s32 sN, void *dP)
{
memcpy(dP, sP, sN * 2);
}
void CColorConverter::convert_R5G6B5toR8G8B8(const void *sP, s32 sN, void *dP)
{
u16 *sB = (u16 *)sP;
u8 *dB = (u8 *)dP;
for (s32 x = 0; x < sN; ++x) {
dB[0] = (*sB & 0xf800) >> 8;
dB[1] = (*sB & 0x07e0) >> 3;
dB[2] = (*sB & 0x001f) << 3;
sB += 1;
dB += 3;
}
}
void CColorConverter::convert_R5G6B5toB8G8R8(const void *sP, s32 sN, void *dP)
{
u16 *sB = (u16 *)sP;
u8 *dB = (u8 *)dP;
for (s32 x = 0; x < sN; ++x) {
dB[2] = (*sB & 0xf800) >> 8;
dB[1] = (*sB & 0x07e0) >> 3;
dB[0] = (*sB & 0x001f) << 3;
sB += 1;
dB += 3;
}
}
void CColorConverter::convert_R5G6B5toA8R8G8B8(const void *sP, s32 sN, void *dP)
{
u16 *sB = (u16 *)sP;
u32 *dB = (u32 *)dP;
for (s32 x = 0; x < sN; ++x)
*dB++ = R5G6B5toA8R8G8B8(*sB++);
}
void CColorConverter::convert_R5G6B5toA1R5G5B5(const void *sP, s32 sN, void *dP)
{
u16 *sB = (u16 *)sP;
u16 *dB = (u16 *)dP;
for (s32 x = 0; x < sN; ++x)
*dB++ = R5G6B5toA1R5G5B5(*sB++);
}
bool CColorConverter::canConvertFormat(ECOLOR_FORMAT sourceFormat, ECOLOR_FORMAT destFormat)
{
switch (sourceFormat) {
case ECF_A1R5G5B5:
switch (destFormat) {
case ECF_A1R5G5B5:
case ECF_R5G6B5:
case ECF_A8R8G8B8:
case ECF_R8G8B8:
return true;
default:
break;
}
break;
case ECF_R5G6B5:
switch (destFormat) {
case ECF_A1R5G5B5:
case ECF_R5G6B5:
case ECF_A8R8G8B8:
case ECF_R8G8B8:
return true;
default:
break;
}
break;
case ECF_A8R8G8B8:
switch (destFormat) {
case ECF_A1R5G5B5:
case ECF_R5G6B5:
case ECF_A8R8G8B8:
case ECF_R8G8B8:
return true;
default:
break;
}
break;
case ECF_R8G8B8:
switch (destFormat) {
case ECF_A1R5G5B5:
case ECF_R5G6B5:
case ECF_A8R8G8B8:
case ECF_R8G8B8:
return true;
default:
break;
}
break;
default:
break;
}
return false;
}
void CColorConverter::convert_viaFormat(const void *sP, ECOLOR_FORMAT sF, s32 sN,
void *dP, ECOLOR_FORMAT dF)
{
// please also update can_convert_viaFormat when adding new conversions
switch (sF) {
case ECF_A1R5G5B5:
switch (dF) {
case ECF_A1R5G5B5:
convert_A1R5G5B5toA1R5G5B5(sP, sN, dP);
break;
case ECF_R5G6B5:
convert_A1R5G5B5toR5G6B5(sP, sN, dP);
break;
case ECF_A8R8G8B8:
convert_A1R5G5B5toA8R8G8B8(sP, sN, dP);
break;
case ECF_R8G8B8:
convert_A1R5G5B5toR8G8B8(sP, sN, dP);
break;
default:
break;
}
break;
case ECF_R5G6B5:
switch (dF) {
case ECF_A1R5G5B5:
convert_R5G6B5toA1R5G5B5(sP, sN, dP);
break;
case ECF_R5G6B5:
convert_R5G6B5toR5G6B5(sP, sN, dP);
break;
case ECF_A8R8G8B8:
convert_R5G6B5toA8R8G8B8(sP, sN, dP);
break;
case ECF_R8G8B8:
convert_R5G6B5toR8G8B8(sP, sN, dP);
break;
default:
break;
}
break;
case ECF_A8R8G8B8:
switch (dF) {
case ECF_A1R5G5B5:
convert_A8R8G8B8toA1R5G5B5(sP, sN, dP);
break;
case ECF_R5G6B5:
convert_A8R8G8B8toR5G6B5(sP, sN, dP);
break;
case ECF_A8R8G8B8:
convert_A8R8G8B8toA8R8G8B8(sP, sN, dP);
break;
case ECF_R8G8B8:
convert_A8R8G8B8toR8G8B8(sP, sN, dP);
break;
default:
break;
}
break;
case ECF_R8G8B8:
switch (dF) {
case ECF_A1R5G5B5:
convert_R8G8B8toA1R5G5B5(sP, sN, dP);
break;
case ECF_R5G6B5:
convert_R8G8B8toR5G6B5(sP, sN, dP);
break;
case ECF_A8R8G8B8:
convert_R8G8B8toA8R8G8B8(sP, sN, dP);
break;
case ECF_R8G8B8:
convert_R8G8B8toR8G8B8(sP, sN, dP);
break;
default:
break;
}
break;
default:
break;
}
}
} // end namespace video
} // end namespace irr