wine/dlls/x11drv/dib_convert.c
2006-02-07 21:16:56 +01:00

1375 lines
48 KiB
C

/*
* DIB conversion routinues for cases where the source and destination
* have the same byte order.
*
* Copyright (C) 2001 Francois Gouget
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include <stdlib.h>
#include "windef.h"
#include "x11drv.h"
/***********************************************************************
* X11DRV_DIB_Convert_*
*
* All X11DRV_DIB_Convert_Xxx functions take at least the following
* parameters:
* - width
* This is the width in pixel of the surface to copy. This may be less
* than the full width of the image.
* - height
* The number of lines to copy. This may be less than the full height
* of the image. This is always >0.
* - srcbits
* Points to the first byte containing data to be copied. If the source
* surface starts are coordinates (x,y) then this is:
* image_ptr+x*bytes_pre_pixel+y*bytes_per_line
* (with further adjustments for top-down/bottom-up images)
* - srclinebytes
* This is the number of bytes per line. It may be >0 or <0 depending on
* whether this is a top-down or bottom-up image.
* - dstbits
* Same as srcbits but for the destination
* - dstlinebytes
* Same as srclinebytes but for the destination.
*
* Notes:
* - The supported Dib formats are: pal1, pal4, pal8, rgb555, bgr555,
* rgb565, bgr565, rgb888 and any 32bit (0888) format.
* The supported XImage (Bmp) formats are: pal1, pal4, pal8,
* rgb555, bgr555, rgb565, bgr565, rgb888, bgr888, rgb0888, bgr0888.
* - Rgb formats are those for which the masks are such that:
* red_mask > green_mask > blue_mask
* - Bgr formats are those for which the masks sort in the other direction.
* - Many conversion functions handle both rgb->bgr and bgr->rgb conversions
* so the comments use h, g, l to mean respectively the source color in the
* high bits, the green, and the source color in the low bits.
*/
/*
* 15 bit conversions
*/
static void convert_5x5_asis(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
int y;
width *= 2;
if (srclinebytes == dstlinebytes && srclinebytes == width)
{
memcpy(dstbits, srcbits, height * width);
return;
}
for (y=0; y<height; y++) {
memcpy(dstbits, srcbits, width);
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_555_reverse(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
const DWORD* srcpixel;
DWORD* dstpixel;
int x,y;
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width/2; x++) {
/* Do 2 pixels at a time */
DWORD srcval;
srcval=*srcpixel++;
*dstpixel++=((srcval << 10) & 0x7c007c00) | /* h */
( srcval & 0x03e003e0) | /* g */
((srcval >> 10) & 0x001f001f); /* l */
}
if (width&1) {
/* And the the odd pixel */
WORD srcval;
srcval=*((const WORD*)srcpixel);
*((WORD*)dstpixel)=((srcval << 10) & 0x7c00) | /* h */
( srcval & 0x03e0) | /* g */
((srcval >> 10) & 0x001f); /* l */
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_555_to_565_asis(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
const DWORD* srcpixel;
DWORD* dstpixel;
int x,y;
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width/2; x++) {
/* Do 2 pixels at a time */
DWORD srcval;
srcval=*srcpixel++;
*dstpixel++=((srcval << 1) & 0xffc0ffc0) | /* h, g */
((srcval >> 4) & 0x00200020) | /* g - 1 bit */
( srcval & 0x001f001f); /* l */
}
if (width&1) {
/* And the the odd pixel */
WORD srcval;
srcval=*((const WORD*)srcpixel);
*((WORD*)dstpixel)=((srcval << 1) & 0xffc0) | /* h, g */
((srcval >> 4) & 0x0020) | /* g - 1 bit */
(srcval & 0x001f); /* l */
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_555_to_565_reverse(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
const DWORD* srcpixel;
DWORD* dstpixel;
int x,y;
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width/2; x++) {
/* Do 2 pixels at a time */
DWORD srcval;
srcval=*srcpixel++;
*dstpixel++=((srcval >> 10) & 0x001f001f) | /* h */
((srcval << 1) & 0x07c007c0) | /* g */
((srcval >> 4) & 0x00200020) | /* g - 1 bit */
((srcval << 11) & 0xf800f800); /* l */
}
if (width&1) {
/* And the the odd pixel */
WORD srcval;
srcval=*((const WORD*)srcpixel);
*((WORD*)dstpixel)=((srcval >> 10) & 0x001f) | /* h */
((srcval << 1) & 0x07c0) | /* g */
((srcval >> 4) & 0x0020) | /* g - 1 bit */
((srcval << 11) & 0xf800); /* l */
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_555_to_888_asis(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
const WORD* srcpixel;
BYTE* dstpixel;
int x,y;
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width; x++) {
WORD srcval;
srcval=*srcpixel++;
dstpixel[0]=((srcval << 3) & 0xf8) | /* l */
((srcval >> 2) & 0x07); /* l - 3 bits */
dstpixel[1]=((srcval >> 2) & 0xf8) | /* g */
((srcval >> 7) & 0x07); /* g - 3 bits */
dstpixel[2]=((srcval >> 7) & 0xf8) | /* h */
((srcval >> 12) & 0x07); /* h - 3 bits */
dstpixel+=3;
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_555_to_888_reverse(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
const WORD* srcpixel;
BYTE* dstpixel;
int x,y;
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width; x++) {
WORD srcval;
srcval=*srcpixel++;
dstpixel[0]=((srcval >> 7) & 0xf8) | /* h */
((srcval >> 12) & 0x07); /* h - 3 bits */
dstpixel[1]=((srcval >> 2) & 0xf8) | /* g */
((srcval >> 7) & 0x07); /* g - 3 bits */
dstpixel[2]=((srcval << 3) & 0xf8) | /* l */
((srcval >> 2) & 0x07); /* l - 3 bits */
dstpixel+=3;
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_555_to_0888_asis(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
const WORD* srcpixel;
DWORD* dstpixel;
int x,y;
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width; x++) {
WORD srcval;
srcval=*srcpixel++;
*dstpixel++=((srcval << 9) & 0xf80000) | /* h */
((srcval << 4) & 0x070000) | /* h - 3 bits */
((srcval << 6) & 0x00f800) | /* g */
((srcval << 1) & 0x000700) | /* g - 3 bits */
((srcval << 3) & 0x0000f8) | /* l */
((srcval >> 2) & 0x000007); /* l - 3 bits */
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_555_to_0888_reverse(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
const WORD* srcpixel;
DWORD* dstpixel;
int x,y;
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width; x++) {
WORD srcval;
srcval=*srcpixel++;
*dstpixel++=((srcval >> 7) & 0x0000f8) | /* h */
((srcval >> 12) & 0x000007) | /* h - 3 bits */
((srcval << 6) & 0x00f800) | /* g */
((srcval << 1) & 0x000700) | /* g - 3 bits */
((srcval << 19) & 0xf80000) | /* l */
((srcval << 14) & 0x070000); /* l - 3 bits */
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_5x5_to_any0888(int width, int height,
const void* srcbits, int srclinebytes,
WORD rsrc, WORD gsrc, WORD bsrc,
void* dstbits, int dstlinebytes,
DWORD rdst, DWORD gdst, DWORD bdst)
{
int rRightShift1,gRightShift1,bRightShift1;
int rRightShift2,gRightShift2,bRightShift2;
BYTE gMask1,gMask2;
int rLeftShift,gLeftShift,bLeftShift;
const WORD* srcpixel;
DWORD* dstpixel;
int x,y;
/* Note, the source pixel value is shifted left by 16 bits so that
* we know we will always have to shift right to extract the components.
*/
rRightShift1=16+X11DRV_DIB_MaskToShift(rsrc)-3;
gRightShift1=16+X11DRV_DIB_MaskToShift(gsrc)-3;
bRightShift1=16+X11DRV_DIB_MaskToShift(bsrc)-3;
rRightShift2=rRightShift1+5;
gRightShift2=gRightShift1+5;
bRightShift2=bRightShift1+5;
if (gsrc==0x03e0) {
/* Green has 5 bits, like the others */
gMask1=0xf8;
gMask2=0x07;
} else {
/* Green has 6 bits, not 5. Compensate. */
gRightShift1++;
gRightShift2+=2;
gMask1=0xfc;
gMask2=0x03;
}
rLeftShift=X11DRV_DIB_MaskToShift(rdst);
gLeftShift=X11DRV_DIB_MaskToShift(gdst);
bLeftShift=X11DRV_DIB_MaskToShift(bdst);
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width; x++) {
DWORD srcval;
BYTE red,green,blue;
srcval=*srcpixel++ << 16;
red= ((srcval >> rRightShift1) & 0xf8) |
((srcval >> rRightShift2) & 0x07);
green=((srcval >> gRightShift1) & gMask1) |
((srcval >> gRightShift2) & gMask2);
blue= ((srcval >> bRightShift1) & 0xf8) |
((srcval >> bRightShift2) & 0x07);
*dstpixel++=(red << rLeftShift) |
(green << gLeftShift) |
(blue << bLeftShift);
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
/*
* 16 bits conversions
*/
static void convert_565_reverse(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
const DWORD* srcpixel;
DWORD* dstpixel;
int x,y;
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width/2; x++) {
/* Do 2 pixels at a time */
DWORD srcval;
srcval=*srcpixel++;
*dstpixel++=((srcval << 11) & 0xf800f800) | /* h */
( srcval & 0x07e007e0) | /* g */
((srcval >> 11) & 0x001f001f); /* l */
}
if (width&1) {
/* And the the odd pixel */
WORD srcval;
srcval=*((const WORD*)srcpixel);
*((WORD*)dstpixel)=((srcval << 11) & 0xf800) | /* h */
( srcval & 0x07e0) | /* g */
((srcval >> 11) & 0x001f); /* l */
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_565_to_555_asis(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
const DWORD* srcpixel;
DWORD* dstpixel;
int x,y;
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width/2; x++) {
/* Do 2 pixels at a time */
DWORD srcval;
srcval=*srcpixel++;
*dstpixel++=((srcval >> 1) & 0x7fe07fe0) | /* h, g */
( srcval & 0x001f001f); /* l */
}
if (width&1) {
/* And the the odd pixel */
WORD srcval;
srcval=*((const WORD*)srcpixel);
*((WORD*)dstpixel)=((srcval >> 1) & 0x7fe0) | /* h, g */
( srcval & 0x001f); /* l */
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_565_to_555_reverse(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
const DWORD* srcpixel;
DWORD* dstpixel;
int x,y;
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width/2; x++) {
/* Do 2 pixels at a time */
DWORD srcval;
srcval=*srcpixel++;
*dstpixel++=((srcval >> 11) & 0x001f001f) | /* h */
((srcval >> 1) & 0x03e003e0) | /* g */
((srcval << 10) & 0x7c007c00); /* l */
}
if (width&1) {
/* And the the odd pixel */
WORD srcval;
srcval=*((const WORD*)srcpixel);
*((WORD*)dstpixel)=((srcval >> 11) & 0x001f) | /* h */
((srcval >> 1) & 0x03e0) | /* g */
((srcval << 10) & 0x7c00); /* l */
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_565_to_888_asis(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
const WORD* srcpixel;
BYTE* dstpixel;
int x,y;
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width; x++) {
WORD srcval;
srcval=*srcpixel++;
dstpixel[0]=((srcval << 3) & 0xf8) | /* l */
((srcval >> 2) & 0x07); /* l - 3 bits */
dstpixel[1]=((srcval >> 3) & 0xfc) | /* g */
((srcval >> 9) & 0x03); /* g - 2 bits */
dstpixel[2]=((srcval >> 8) & 0xf8) | /* h */
((srcval >> 13) & 0x07); /* h - 3 bits */
dstpixel+=3;
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_565_to_888_reverse(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
const WORD* srcpixel;
BYTE* dstpixel;
int x,y;
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width; x++) {
WORD srcval;
srcval=*srcpixel++;
dstpixel[0]=((srcval >> 8) & 0xf8) | /* h */
((srcval >> 13) & 0x07); /* h - 3 bits */
dstpixel[1]=((srcval >> 3) & 0xfc) | /* g */
((srcval >> 9) & 0x03); /* g - 2 bits */
dstpixel[2]=((srcval << 3) & 0xf8) | /* l */
((srcval >> 2) & 0x07); /* l - 3 bits */
dstpixel+=3;
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_565_to_0888_asis(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
const WORD* srcpixel;
DWORD* dstpixel;
int x,y;
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width; x++) {
WORD srcval;
srcval=*srcpixel++;
*dstpixel++=((srcval << 8) & 0xf80000) | /* h */
((srcval << 3) & 0x070000) | /* h - 3 bits */
((srcval << 5) & 0x00fc00) | /* g */
((srcval >> 1) & 0x000300) | /* g - 2 bits */
((srcval << 3) & 0x0000f8) | /* l */
((srcval >> 2) & 0x000007); /* l - 3 bits */
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_565_to_0888_reverse(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
const WORD* srcpixel;
DWORD* dstpixel;
int x,y;
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width; x++) {
WORD srcval;
srcval=*srcpixel++;
*dstpixel++=((srcval >> 8) & 0x0000f8) | /* h */
((srcval >> 13) & 0x000007) | /* h - 3 bits */
((srcval << 5) & 0x00fc00) | /* g */
((srcval >> 1) & 0x000300) | /* g - 2 bits */
((srcval << 19) & 0xf80000) | /* l */
((srcval << 14) & 0x070000); /* l - 3 bits */
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
/*
* 24 bit conversions
*/
static void convert_888_asis(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
int y;
width *= 3;
if (srclinebytes == dstlinebytes && srclinebytes == width)
{
memcpy(dstbits, srcbits, height * width);
return;
}
for (y=0; y<height; y++) {
memcpy(dstbits, srcbits, width);
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_888_reverse(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
const BYTE* srcpixel;
BYTE* dstpixel;
int x,y;
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width; x++) {
dstpixel[0]=srcpixel[2];
dstpixel[1]=srcpixel[1];
dstpixel[2]=srcpixel[0];
srcpixel+=3;
dstpixel+=3;
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_888_to_555_asis(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
const DWORD* srcpixel;
const BYTE* srcbyte;
WORD* dstpixel;
int x,y;
int oddwidth;
oddwidth=width & 3;
width=width/4;
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width; x++) {
/* Do 4 pixels at a time: 3 dwords in and 4 words out */
DWORD srcval1,srcval2;
srcval1=srcpixel[0];
dstpixel[0]=((srcval1 >> 3) & 0x001f) | /* l1 */
((srcval1 >> 6) & 0x03e0) | /* g1 */
((srcval1 >> 9) & 0x7c00); /* h1 */
srcval2=srcpixel[1];
dstpixel[1]=((srcval1 >> 27) & 0x001f) | /* l2 */
((srcval2 << 2) & 0x03e0) | /* g2 */
((srcval2 >> 1) & 0x7c00); /* h2 */
srcval1=srcpixel[2];
dstpixel[2]=((srcval2 >> 19) & 0x001f) | /* l3 */
((srcval2 >> 22) & 0x03e0) | /* g3 */
((srcval1 << 7) & 0x7c00); /* h3 */
dstpixel[3]=((srcval1 >> 11) & 0x001f) | /* l4 */
((srcval1 >> 14) & 0x03e0) | /* g4 */
((srcval1 >> 17) & 0x7c00); /* h4 */
srcpixel+=3;
dstpixel+=4;
}
/* And now up to 3 odd pixels */
srcbyte=(const BYTE*)srcpixel;
for (x=0; x<oddwidth; x++) {
WORD dstval;
dstval =((srcbyte[0] >> 3) & 0x001f); /* l */
dstval|=((srcbyte[1] << 2) & 0x03e0); /* g */
dstval|=((srcbyte[2] << 7) & 0x7c00); /* h */
*dstpixel++=dstval;
srcbyte+=3;
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_888_to_555_reverse(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
const DWORD* srcpixel;
const BYTE* srcbyte;
WORD* dstpixel;
int x,y;
int oddwidth;
oddwidth=width & 3;
width=width/4;
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width; x++) {
/* Do 4 pixels at a time: 3 dwords in and 4 words out */
DWORD srcval1,srcval2;
srcval1=srcpixel[0];
dstpixel[0]=((srcval1 << 7) & 0x7c00) | /* l1 */
((srcval1 >> 6) & 0x03e0) | /* g1 */
((srcval1 >> 19) & 0x001f); /* h1 */
srcval2=srcpixel[1];
dstpixel[1]=((srcval1 >> 17) & 0x7c00) | /* l2 */
((srcval2 << 2) & 0x03e0) | /* g2 */
((srcval2 >> 11) & 0x001f); /* h2 */
srcval1=srcpixel[2];
dstpixel[2]=((srcval2 >> 9) & 0x7c00) | /* l3 */
((srcval2 >> 22) & 0x03e0) | /* g3 */
((srcval1 >> 3) & 0x001f); /* h3 */
dstpixel[3]=((srcval1 >> 1) & 0x7c00) | /* l4 */
((srcval1 >> 14) & 0x03e0) | /* g4 */
((srcval1 >> 27) & 0x001f); /* h4 */
srcpixel+=3;
dstpixel+=4;
}
/* And now up to 3 odd pixels */
srcbyte=(const BYTE*)srcpixel;
for (x=0; x<oddwidth; x++) {
WORD dstval;
dstval =((srcbyte[0] << 7) & 0x7c00); /* l */
dstval|=((srcbyte[1] << 2) & 0x03e0); /* g */
dstval|=((srcbyte[2] >> 3) & 0x001f); /* h */
*dstpixel++=dstval;
srcbyte+=3;
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_888_to_565_asis(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
const DWORD* srcpixel;
const BYTE* srcbyte;
WORD* dstpixel;
int x,y;
int oddwidth;
oddwidth=width & 3;
width=width/4;
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width; x++) {
/* Do 4 pixels at a time: 3 dwords in and 4 words out */
DWORD srcval1,srcval2;
srcval1=srcpixel[0];
dstpixel[0]=((srcval1 >> 3) & 0x001f) | /* l1 */
((srcval1 >> 5) & 0x07e0) | /* g1 */
((srcval1 >> 8) & 0xf800); /* h1 */
srcval2=srcpixel[1];
dstpixel[1]=((srcval1 >> 27) & 0x001f) | /* l2 */
((srcval2 << 3) & 0x07e0) | /* g2 */
( srcval2 & 0xf800); /* h2 */
srcval1=srcpixel[2];
dstpixel[2]=((srcval2 >> 19) & 0x001f) | /* l3 */
((srcval2 >> 21) & 0x07e0) | /* g3 */
((srcval1 << 8) & 0xf800); /* h3 */
dstpixel[3]=((srcval1 >> 11) & 0x001f) | /* l4 */
((srcval1 >> 13) & 0x07e0) | /* g4 */
((srcval1 >> 16) & 0xf800); /* h4 */
srcpixel+=3;
dstpixel+=4;
}
/* And now up to 3 odd pixels */
srcbyte=(const BYTE*)srcpixel;
for (x=0; x<oddwidth; x++) {
WORD dstval;
dstval =((srcbyte[0] >> 3) & 0x001f); /* l */
dstval|=((srcbyte[1] << 3) & 0x07e0); /* g */
dstval|=((srcbyte[2] << 8) & 0xf800); /* h */
*dstpixel++=dstval;
srcbyte+=3;
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_888_to_565_reverse(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
const DWORD* srcpixel;
const BYTE* srcbyte;
WORD* dstpixel;
int x,y;
int oddwidth;
oddwidth=width & 3;
width=width/4;
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width; x++) {
/* Do 4 pixels at a time: 3 dwords in and 4 words out */
DWORD srcval1,srcval2;
srcval1=srcpixel[0];
dstpixel[0]=((srcval1 << 8) & 0xf800) | /* l1 */
((srcval1 >> 5) & 0x07e0) | /* g1 */
((srcval1 >> 19) & 0x001f); /* h1 */
srcval2=srcpixel[1];
dstpixel[1]=((srcval1 >> 16) & 0xf800) | /* l2 */
((srcval2 << 3) & 0x07e0) | /* g2 */
((srcval2 >> 11) & 0x001f); /* h2 */
srcval1=srcpixel[2];
dstpixel[2]=((srcval2 >> 8) & 0xf800) | /* l3 */
((srcval2 >> 21) & 0x07e0) | /* g3 */
((srcval1 >> 3) & 0x001f); /* h3 */
dstpixel[3]=(srcval1 & 0xf800) | /* l4 */
((srcval1 >> 13) & 0x07e0) | /* g4 */
((srcval1 >> 27) & 0x001f); /* h4 */
srcpixel+=3;
dstpixel+=4;
}
/* And now up to 3 odd pixels */
srcbyte=(const BYTE*)srcpixel;
for (x=0; x<oddwidth; x++) {
WORD dstval;
dstval =((srcbyte[0] << 8) & 0xf800); /* l */
dstval|=((srcbyte[1] << 3) & 0x07e0); /* g */
dstval|=((srcbyte[2] >> 3) & 0x001f); /* h */
*dstpixel++=dstval;
srcbyte+=3;
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_888_to_0888_asis(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
const DWORD* srcpixel;
DWORD* dstpixel;
int x,y;
int oddwidth;
oddwidth=width & 3;
width=width/4;
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width; x++) {
/* Do 4 pixels at a time: 3 dwords in and 4 dwords out */
DWORD srcval1,srcval2;
srcval1=srcpixel[0];
dstpixel[0]=( srcval1 & 0x00ffffff); /* h1, g1, l1 */
srcval2=srcpixel[1];
dstpixel[1]=( srcval1 >> 24) | /* l2 */
((srcval2 << 8) & 0x00ffff00); /* h2, g2 */
srcval1=srcpixel[2];
dstpixel[2]=( srcval2 >> 16) | /* g3, l3 */
((srcval1 << 16) & 0x00ff0000); /* h3 */
dstpixel[3]=( srcval1 >> 8); /* h4, g4, l4 */
srcpixel+=3;
dstpixel+=4;
}
/* And now up to 3 odd pixels */
for (x=0; x<oddwidth; x++) {
DWORD srcval;
srcval=*srcpixel;
srcpixel=(const DWORD*)(((const char*)srcpixel)+3);
*dstpixel++=( srcval & 0x00ffffff); /* h, g, l */
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_888_to_0888_reverse(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
const DWORD* srcpixel;
DWORD* dstpixel;
int x,y;
int oddwidth;
oddwidth=width & 3;
width=width/4;
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width; x++) {
/* Do 4 pixels at a time: 3 dwords in and 4 dwords out */
DWORD srcval1,srcval2;
srcval1=srcpixel[0];
dstpixel[0]=((srcval1 >> 16) & 0x0000ff) | /* h1 */
( srcval1 & 0x00ff00) | /* g1 */
((srcval1 << 16) & 0xff0000); /* l1 */
srcval2=srcpixel[1];
dstpixel[1]=((srcval1 >> 8) & 0xff0000) | /* l2 */
((srcval2 << 8) & 0x00ff00) | /* g2 */
((srcval2 >> 8) & 0x0000ff); /* h2 */
srcval1=srcpixel[2];
dstpixel[2]=( srcval2 & 0xff0000) | /* l3 */
((srcval2 >> 16) & 0x00ff00) | /* g3 */
( srcval1 & 0x0000ff); /* h3 */
dstpixel[3]=((srcval1 >> 24) & 0x0000ff) | /* h4 */
((srcval1 >> 8) & 0x00ff00) | /* g4 */
((srcval1 << 8) & 0xff0000); /* l4 */
srcpixel+=3;
dstpixel+=4;
}
/* And now up to 3 odd pixels */
for (x=0; x<oddwidth; x++) {
DWORD srcval;
srcval=*srcpixel;
srcpixel=(const DWORD*)(((const char*)srcpixel)+3);
*dstpixel++=((srcval >> 16) & 0x0000ff) | /* h */
( srcval & 0x00ff00) | /* g */
((srcval << 16) & 0xff0000); /* l */
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_rgb888_to_any0888(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes,
DWORD rdst, DWORD gdst, DWORD bdst)
{
int rLeftShift,gLeftShift,bLeftShift;
const BYTE* srcpixel;
DWORD* dstpixel;
int x,y;
rLeftShift=X11DRV_DIB_MaskToShift(rdst);
gLeftShift=X11DRV_DIB_MaskToShift(gdst);
bLeftShift=X11DRV_DIB_MaskToShift(bdst);
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width; x++) {
*dstpixel++=(srcpixel[0] << bLeftShift) | /* b */
(srcpixel[1] << gLeftShift) | /* g */
(srcpixel[2] << rLeftShift); /* r */
srcpixel+=3;
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_bgr888_to_any0888(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes,
DWORD rdst, DWORD gdst, DWORD bdst)
{
int rLeftShift,gLeftShift,bLeftShift;
const BYTE* srcpixel;
DWORD* dstpixel;
int x,y;
rLeftShift=X11DRV_DIB_MaskToShift(rdst);
gLeftShift=X11DRV_DIB_MaskToShift(gdst);
bLeftShift=X11DRV_DIB_MaskToShift(bdst);
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width; x++) {
*dstpixel++=(srcpixel[0] << rLeftShift) | /* r */
(srcpixel[1] << gLeftShift) | /* g */
(srcpixel[2] << bLeftShift); /* b */
srcpixel+=3;
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
/*
* 32 bit conversions
*/
static void convert_0888_asis(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
int y;
width *= 4;
if (srclinebytes == dstlinebytes && srclinebytes == width)
{
memcpy(dstbits, srcbits, height * width);
return;
}
for (y=0; y<height; y++) {
memcpy(dstbits, srcbits, width);
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_0888_reverse(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
const DWORD* srcpixel;
DWORD* dstpixel;
int x,y;
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width; x++) {
DWORD srcval;
srcval=*srcpixel++;
*dstpixel++=((srcval << 16) & 0x00ff0000) | /* h */
( srcval & 0x0000ff00) | /* g */
((srcval >> 16) & 0x000000ff); /* l */
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_0888_any(int width, int height,
const void* srcbits, int srclinebytes,
DWORD rsrc, DWORD gsrc, DWORD bsrc,
void* dstbits, int dstlinebytes,
DWORD rdst, DWORD gdst, DWORD bdst)
{
int rRightShift,gRightShift,bRightShift;
int rLeftShift,gLeftShift,bLeftShift;
const DWORD* srcpixel;
DWORD* dstpixel;
int x,y;
rRightShift=X11DRV_DIB_MaskToShift(rsrc);
gRightShift=X11DRV_DIB_MaskToShift(gsrc);
bRightShift=X11DRV_DIB_MaskToShift(bsrc);
rLeftShift=X11DRV_DIB_MaskToShift(rdst);
gLeftShift=X11DRV_DIB_MaskToShift(gdst);
bLeftShift=X11DRV_DIB_MaskToShift(bdst);
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width; x++) {
DWORD srcval;
srcval=*srcpixel++;
*dstpixel++=(((srcval >> rRightShift) & 0xff) << rLeftShift) |
(((srcval >> gRightShift) & 0xff) << gLeftShift) |
(((srcval >> bRightShift) & 0xff) << bLeftShift);
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_0888_to_555_asis(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
const DWORD* srcpixel;
WORD* dstpixel;
int x,y;
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width; x++) {
DWORD srcval;
srcval=*srcpixel++;
*dstpixel++=((srcval >> 9) & 0x7c00) | /* h */
((srcval >> 6) & 0x03e0) | /* g */
((srcval >> 3) & 0x001f); /* l */
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_0888_to_555_reverse(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
const DWORD* srcpixel;
WORD* dstpixel;
int x,y;
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width; x++) {
DWORD srcval;
srcval=*srcpixel++;
*dstpixel++=((srcval >> 19) & 0x001f) | /* h */
((srcval >> 6) & 0x03e0) | /* g */
((srcval << 7) & 0x7c00); /* l */
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_0888_to_565_asis(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
const DWORD* srcpixel;
WORD* dstpixel;
int x,y;
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width; x++) {
DWORD srcval;
srcval=*srcpixel++;
*dstpixel++=((srcval >> 8) & 0xf800) | /* h */
((srcval >> 5) & 0x07e0) | /* g */
((srcval >> 3) & 0x001f); /* l */
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_0888_to_565_reverse(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
const DWORD* srcpixel;
WORD* dstpixel;
int x,y;
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width; x++) {
DWORD srcval;
srcval=*srcpixel++;
*dstpixel++=((srcval >> 19) & 0x001f) | /* h */
((srcval >> 5) & 0x07e0) | /* g */
((srcval << 8) & 0xf800); /* l */
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_any0888_to_5x5(int width, int height,
const void* srcbits, int srclinebytes,
DWORD rsrc, DWORD gsrc, DWORD bsrc,
void* dstbits, int dstlinebytes,
WORD rdst, WORD gdst, WORD bdst)
{
int rRightShift,gRightShift,bRightShift;
int rLeftShift,gLeftShift,bLeftShift;
const DWORD* srcpixel;
WORD* dstpixel;
int x,y;
/* Here is how we proceed. Assume we have rsrc=0x0000ff00 and our pixel
* contains 0x11223344.
* - first we shift 0x11223344 right by rRightShift to bring the most
* significant bits of the red components in the bottom 5 (or 6) bits
* -> 0x4488c
* - then we remove non red bits by anding with the modified rdst (0x1f)
* -> 0x0c
* - finally shift these bits left by rLeftShift so that they end up in
* the right place
* -> 0x3000
*/
rRightShift=X11DRV_DIB_MaskToShift(rsrc)+3;
gRightShift=X11DRV_DIB_MaskToShift(gsrc);
gRightShift+=(gdst==0x07e0?2:3);
bRightShift=X11DRV_DIB_MaskToShift(bsrc)+3;
rLeftShift=X11DRV_DIB_MaskToShift(rdst);
rdst=rdst >> rLeftShift;
gLeftShift=X11DRV_DIB_MaskToShift(gdst);
gdst=gdst >> gLeftShift;
bLeftShift=X11DRV_DIB_MaskToShift(bdst);
bdst=bdst >> bLeftShift;
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width; x++) {
DWORD srcval;
srcval=*srcpixel++;
*dstpixel++=(((srcval >> rRightShift) & rdst) << rLeftShift) |
(((srcval >> gRightShift) & gdst) << gLeftShift) |
(((srcval >> bRightShift) & bdst) << bLeftShift);
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_0888_to_888_asis(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
const DWORD* srcpixel;
DWORD* dstpixel;
BYTE* dstbyte;
int x,y;
int oddwidth;
oddwidth=width & 3;
width=width/4;
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width; x++) {
/* Do 4 pixels at a time: 4 dwords in and 3 dwords out */
DWORD srcval;
srcval=((*srcpixel++) & 0x00ffffff); /* h1, g1, l1*/
*dstpixel++=srcval | ((*srcpixel) << 24); /* h2 */
srcval=((*srcpixel++ >> 8 ) & 0x0000ffff); /* g2, l2 */
*dstpixel++=srcval | ((*srcpixel) << 16); /* h3, g3 */
srcval=((*srcpixel++ >> 16) & 0x000000ff); /* l3 */
*dstpixel++=srcval | ((*srcpixel++) << 8); /* h4, g4, l4 */
}
/* And now up to 3 odd pixels */
dstbyte=(BYTE*)dstpixel;
for (x=0; x<oddwidth; x++) {
DWORD srcval;
srcval=*srcpixel++;
*((WORD*)dstbyte) = srcval; /* h, g */
dstbyte+=sizeof(WORD);
*dstbyte++=srcval >> 16; /* l */
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_0888_to_888_reverse(int width, int height,
const void* srcbits, int srclinebytes,
void* dstbits, int dstlinebytes)
{
const DWORD* srcpixel;
DWORD* dstpixel;
BYTE* dstbyte;
int x,y;
int oddwidth;
oddwidth=width & 3;
width=width/4;
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width; x++) {
/* Do 4 pixels at a time: 4 dwords in and 3 dwords out */
DWORD srcval1,srcval2;
srcval1=*srcpixel++;
srcval2= ((srcval1 >> 16) & 0x000000ff) | /* h1 */
( srcval1 & 0x0000ff00) | /* g1 */
((srcval1 << 16) & 0x00ff0000); /* l1 */
srcval1=*srcpixel++;
*dstpixel++=srcval2 |
((srcval1 << 8) & 0xff000000); /* h2 */
srcval2= ((srcval1 >> 8) & 0x000000ff) | /* g2 */
((srcval1 << 8) & 0x0000ff00); /* l2 */
srcval1=*srcpixel++;
*dstpixel++=srcval2 |
( srcval1 & 0x00ff0000) | /* h3 */
((srcval1 << 16) & 0xff000000); /* g3 */
srcval2= ( srcval1 & 0x000000ff); /* l3 */
srcval1=*srcpixel++;
*dstpixel++=srcval2 |
((srcval1 >> 8) & 0x0000ff00) | /* h4 */
((srcval1 << 8) & 0x00ff0000) | /* g4 */
( srcval1 << 24); /* l4 */
}
/* And now up to 3 odd pixels */
dstbyte=(BYTE*)dstpixel;
for (x=0; x<oddwidth; x++) {
DWORD srcval;
srcval=*srcpixel++;
*((WORD*)dstbyte)=((srcval >> 16) & 0x00ff) | /* h */
(srcval & 0xff00); /* g */
dstbyte += sizeof(WORD);
*dstbyte++=srcval; /* l */
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_any0888_to_rgb888(int width, int height,
const void* srcbits, int srclinebytes,
DWORD rsrc, DWORD gsrc, DWORD bsrc,
void* dstbits, int dstlinebytes)
{
int rRightShift,gRightShift,bRightShift;
const DWORD* srcpixel;
BYTE* dstpixel;
int x,y;
rRightShift=X11DRV_DIB_MaskToShift(rsrc);
gRightShift=X11DRV_DIB_MaskToShift(gsrc);
bRightShift=X11DRV_DIB_MaskToShift(bsrc);
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width; x++) {
DWORD srcval;
srcval=*srcpixel++;
dstpixel[0]=(srcval >> bRightShift); /* b */
dstpixel[1]=(srcval >> gRightShift); /* g */
dstpixel[2]=(srcval >> rRightShift); /* r */
dstpixel+=3;
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
static void convert_any0888_to_bgr888(int width, int height,
const void* srcbits, int srclinebytes,
DWORD rsrc, DWORD gsrc, DWORD bsrc,
void* dstbits, int dstlinebytes)
{
int rRightShift,gRightShift,bRightShift;
const DWORD* srcpixel;
BYTE* dstpixel;
int x,y;
rRightShift=X11DRV_DIB_MaskToShift(rsrc);
gRightShift=X11DRV_DIB_MaskToShift(gsrc);
bRightShift=X11DRV_DIB_MaskToShift(bsrc);
for (y=0; y<height; y++) {
srcpixel=srcbits;
dstpixel=dstbits;
for (x=0; x<width; x++) {
DWORD srcval;
srcval=*srcpixel++;
dstpixel[0]=(srcval >> rRightShift); /* r */
dstpixel[1]=(srcval >> gRightShift); /* g */
dstpixel[2]=(srcval >> bRightShift); /* b */
dstpixel+=3;
}
srcbits = (const char*)srcbits + srclinebytes;
dstbits = (char*)dstbits + dstlinebytes;
}
}
const dib_conversions dib_normal = {
convert_5x5_asis,
convert_555_reverse,
convert_555_to_565_asis,
convert_555_to_565_reverse,
convert_555_to_888_asis,
convert_555_to_888_reverse,
convert_555_to_0888_asis,
convert_555_to_0888_reverse,
convert_5x5_to_any0888,
convert_565_reverse,
convert_565_to_555_asis,
convert_565_to_555_reverse,
convert_565_to_888_asis,
convert_565_to_888_reverse,
convert_565_to_0888_asis,
convert_565_to_0888_reverse,
convert_888_asis,
convert_888_reverse,
convert_888_to_555_asis,
convert_888_to_555_reverse,
convert_888_to_565_asis,
convert_888_to_565_reverse,
convert_888_to_0888_asis,
convert_888_to_0888_reverse,
convert_rgb888_to_any0888,
convert_bgr888_to_any0888,
convert_0888_asis,
convert_0888_reverse,
convert_0888_any,
convert_0888_to_555_asis,
convert_0888_to_555_reverse,
convert_0888_to_565_asis,
convert_0888_to_565_reverse,
convert_any0888_to_5x5,
convert_0888_to_888_asis,
convert_0888_to_888_reverse,
convert_any0888_to_rgb888,
convert_any0888_to_bgr888
};