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libs-back/Source/x11/convert.c
Adam Fedor 590c87e78b Fix GSSendBezierPath. Fix includes for wraster files 
git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/back/trunk@13271 72102866-910b-0410-8b05-ffd578937521
2002-03-29 19:25:35 +00:00

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/* convert.c - convert RImage to Pixmap
*
* Raster graphics library
*
* Copyright (c) 1997-2000 Alfredo K. Kojima
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <config.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#ifdef BENCH
#include "bench.h"
#endif
#include "x11/wraster.h"
#ifdef XSHM
extern Pixmap R_CreateXImageMappedPixmap(RContext *context, RXImage *ximage);
#endif
#ifdef ASM_X86
extern void x86_PseudoColor_32_to_8(unsigned char *image,
unsigned char *ximage,
char *err, char *nerr,
short *ctable,
int dr, int dg, int db,
unsigned long *pixels,
int cpc,
int width, int height,
int bytesPerPixel,
int line_offset);
#endif /* ASM_X86 */
#ifdef ASM_X86_MMX
extern int x86_check_mmx();
extern void x86_mmx_TrueColor_32_to_16(unsigned char *image,
unsigned short *ximage,
short *err, short *nerr,
short *rtable, short *gtable,
short *btable,
int dr, int dg, int db,
unsigned int roffs,
unsigned int goffs,
unsigned int boffs,
int width, int height,
int line_offset);
#endif /* ASM_X86_MMX */
typedef struct RConversionTable {
unsigned short table[256];
unsigned short index;
struct RConversionTable *next;
} RConversionTable;
typedef struct RStdConversionTable {
unsigned int table[256];
unsigned short mult;
unsigned short max;
struct RStdConversionTable *next;
} RStdConversionTable;
static RConversionTable *conversionTable = NULL;
static RStdConversionTable *stdConversionTable = NULL;
static unsigned short*
computeTable(unsigned short mask)
{
RConversionTable *tmp = conversionTable;
int i;
while (tmp) {
if (tmp->index == mask)
break;
tmp = tmp->next;
}
if (tmp)
return tmp->table;
tmp = (RConversionTable *)malloc(sizeof(RConversionTable));
if (tmp == NULL)
return NULL;
for (i=0;i<256;i++)
tmp->table[i] = (i*mask + 0x7f)/0xff;
tmp->index = mask;
tmp->next = conversionTable;
conversionTable = tmp;
return tmp->table;
}
static unsigned int*
computeStdTable(unsigned int mult, unsigned int max)
{
RStdConversionTable *tmp = stdConversionTable;
unsigned int i;
while (tmp) {
if (tmp->mult == mult && tmp->max == max)
break;
tmp = tmp->next;
}
if (tmp)
return tmp->table;
tmp = (RStdConversionTable *)malloc(sizeof(RStdConversionTable));
if (tmp == NULL)
return NULL;
for (i=0; i<256; i++) {
tmp->table[i] = (i*max)/0xff * mult;
}
tmp->mult = mult;
tmp->max = max;
tmp->next = stdConversionTable;
stdConversionTable = tmp;
return tmp->table;
}
/***************************************************************************/
static void
convertTrueColor_generic(RXImage *ximg, RImage *image,
char *err, char *nerr,
const short *rtable,
const short *gtable,
const short *btable,
const int dr, const int dg, const int db,
const unsigned short roffs,
const unsigned short goffs,
const unsigned short boffs)
{
char *terr;
int x, y, r, g, b;
int pixel;
int rer, ger, ber;
unsigned char *ptr = image->data;
int channels = image->format == RRGBAFormat ? 4 : 3;
/* convert and dither the image to XImage */
for (y=0; y<image->height; y++) {
nerr[0] = 0;
nerr[1] = 0;
nerr[2] = 0;
for (x=0; x<image->width; x++, ptr+=channels) {
/* reduce pixel */
pixel = *ptr + err[x];
if (pixel<0) pixel=0; else if (pixel>0xff) pixel=0xff;
r = rtable[pixel];
/* calc error */
rer = pixel - r*dr;
/* reduce pixel */
pixel = *(ptr+1) + err[x+1];
if (pixel<0) pixel=0; else if (pixel>0xff) pixel=0xff;
g = gtable[pixel];
/* calc error */
ger = pixel - g*dg;
/* reduce pixel */
pixel = *(ptr+2) + err[x+2];
if (pixel<0) pixel=0; else if (pixel>0xff) pixel=0xff;
b = btable[pixel];
/* calc error */
ber = pixel - b*db;
pixel = (r<<roffs) | (g<<goffs) | (b<<boffs);
XPutPixel(ximg->image, x, y, pixel);
/* distribute error */
r = (rer*3)/8;
g = (ger*3)/8;
b = (ber*3)/8;
/* x+1, y */
err[x+3*1]+=r;
err[x+1+3*1]+=g;
err[x+2+3*1]+=b;
/* x, y+1 */
nerr[x]+=r;
nerr[x+1]+=g;
nerr[x+2]+=b;
/* x+1, y+1 */
nerr[x+3*1]=rer-2*r;
nerr[x+1+3*1]=ger-2*g;
nerr[x+2+3*1]=ber-2*b;
}
/* skip to next line */
terr = err;
err = nerr;
nerr = terr;
}
}
static RXImage*
image2TrueColor(RContext *ctx, RImage *image)
{
RXImage *ximg;
unsigned short rmask, gmask, bmask;
unsigned short roffs, goffs, boffs;
unsigned short *rtable, *gtable, *btable;
int channels = (image->format == RRGBAFormat ? 4 : 3);
ximg = RCreateXImage(ctx, ctx->depth, image->width, image->height);
if (!ximg) {
return NULL;
}
roffs = ctx->red_offset;
goffs = ctx->green_offset;
boffs = ctx->blue_offset;
rmask = ctx->visual->red_mask >> roffs;
gmask = ctx->visual->green_mask >> goffs;
bmask = ctx->visual->blue_mask >> boffs;
rtable = computeTable(rmask);
gtable = computeTable(gmask);
btable = computeTable(bmask);
if (rtable==NULL || gtable==NULL || btable==NULL) {
RErrorCode = RERR_NOMEMORY;
RDestroyXImage(ctx, ximg);
return NULL;
}
#ifdef BENCH
cycle_bench(1);
#endif
if (ctx->attribs->render_mode==RBestMatchRendering) {
int ofs, r, g, b;
int x, y;
unsigned long pixel;
unsigned char *ptr = image->data;
/* fake match */
#ifdef DEBUG
puts("true color match");
#endif
for (y=0, ofs=0; y < image->height; y++) {
for (x=0; x < image->width; x++, ofs+=channels-3) {
/* reduce pixel */
r = rtable[ptr[ofs++]];
g = gtable[ptr[ofs++]];
b = btable[ptr[ofs++]];
pixel = (r<<roffs) | (g<<goffs) | (b<<boffs);
XPutPixel(ximg->image, x, y, pixel);
}
}
} else {
/* dither */
const int dr=0xff/rmask;
const int dg=0xff/gmask;
const int db=0xff/bmask;
#ifdef DEBUG
puts("true color dither");
#endif
#ifdef ASM_X86_MMX
if (ctx->depth == 16 && image->format == RRGBAFormat
&& x86_check_mmx()) {
short *err;
short *nerr;
err = malloc(8*(image->width+3));
nerr = malloc(8*(image->width+3));
if (!err || !nerr) {
if (nerr)
free(nerr);
RErrorCode = RERR_NOMEMORY;
RDestroyXImage(ctx, ximg);
return NULL;
}
memset(err, 0, 8*(image->width+3));
memset(nerr, 0, 8*(image->width+3));
x86_mmx_TrueColor_32_to_16(image->data,
(unsigned short*)ximg->image->data,
err+8, nerr+8,
rtable, gtable, btable,
dr, dg, db,
roffs, goffs, boffs,
image->width, image->height,
ximg->image->bytes_per_line - 2*image->width);
free(err);
free(nerr);
} else
#endif /* ASM_X86_MMX */
{
char *err;
char *nerr;
int ch = image->format == RRGBAFormat ? 4 : 3;
err = malloc(ch*(image->width+2));
nerr = malloc(ch*(image->width+2));
if (!err || !nerr) {
if (nerr)
free(nerr);
RErrorCode = RERR_NOMEMORY;
RDestroyXImage(ctx, ximg);
return NULL;
}
memset(err, 0, ch*(image->width+2));
memset(nerr, 0, ch*(image->width+2));
convertTrueColor_generic(ximg, image, err, nerr,
rtable, gtable, btable,
dr, dg, db, roffs, goffs, boffs);
free(err);
free(nerr);
}
}
#ifdef BENCH
cycle_bench(0);
#endif
return ximg;
}
/***************************************************************************/
static void
convertPseudoColor_to_8(RXImage *ximg, RImage *image,
char *err, char *nerr,
const short *rtable,
const short *gtable,
const short *btable,
const int dr, const int dg, const int db,
unsigned long *pixels,
int cpc)
{
char *terr;
int x, y, r, g, b;
int pixel;
int rer, ger, ber;
unsigned char *ptr = image->data;
unsigned char *optr = ximg->image->data;
int channels = image->format == RRGBAFormat ? 4 : 3;
int cpcpc = cpc*cpc;
/* convert and dither the image to XImage */
for (y=0; y<image->height; y++) {
nerr[0] = 0;
nerr[1] = 0;
nerr[2] = 0;
for (x=0; x<image->width*3; x+=3, ptr+=channels) {
/* reduce pixel */
pixel = *ptr + err[x];
if (pixel<0) pixel=0; else if (pixel>0xff) pixel=0xff;
r = rtable[pixel];
/* calc error */
rer = pixel - r*dr;
/* reduce pixel */
pixel = *(ptr+1) + err[x+1];
if (pixel<0) pixel=0; else if (pixel>0xff) pixel=0xff;
g = gtable[pixel];
/* calc error */
ger = pixel - g*dg;
/* reduce pixel */
pixel = *(ptr+2) + err[x+2];
if (pixel<0) pixel=0; else if (pixel>0xff) pixel=0xff;
b = btable[pixel];
/* calc error */
ber = pixel - b*db;
*optr++ = pixels[r*cpcpc + g*cpc + b];
/* distribute error */
r = (rer*3)/8;
g = (ger*3)/8;
b = (ber*3)/8;
/* x+1, y */
err[x+3*1]+=r;
err[x+1+3*1]+=g;
err[x+2+3*1]+=b;
/* x, y+1 */
nerr[x]+=r;
nerr[x+1]+=g;
nerr[x+2]+=b;
/* x+1, y+1 */
nerr[x+3*1]=rer-2*r;
nerr[x+1+3*1]=ger-2*g;
nerr[x+2+3*1]=ber-2*b;
}
/* skip to next line */
terr = err;
err = nerr;
nerr = terr;
optr += ximg->image->bytes_per_line - image->width;
}
}
static RXImage*
image2PseudoColor(RContext *ctx, RImage *image)
{
RXImage *ximg;
register int x, y, r, g, b;
unsigned char *ptr;
unsigned long pixel;
const int cpc=ctx->attribs->colors_per_channel;
const unsigned short rmask = cpc-1; /* different sizes could be used */
const unsigned short gmask = rmask; /* for r,g,b */
const unsigned short bmask = rmask;
unsigned short *rtable, *gtable, *btable;
const int cpccpc = cpc*cpc;
int channels = image->format == RRGBAFormat ? 4 : 3;
ximg = RCreateXImage(ctx, ctx->depth, image->width, image->height);
if (!ximg) {
return NULL;
}
ptr = image->data;
/* Tables are same at the moment because rmask==gmask==bmask. */
rtable = computeTable(rmask);
gtable = computeTable(gmask);
btable = computeTable(bmask);
if (rtable==NULL || gtable==NULL || btable==NULL) {
RErrorCode = RERR_NOMEMORY;
RDestroyXImage(ctx, ximg);
return NULL;
}
if (ctx->attribs->render_mode == RBestMatchRendering) {
/* fake match */
#ifdef DEBUG
printf("pseudo color match with %d colors per channel\n", cpc);
#endif
for (y=0; y<image->height; y++) {
for (x=0; x<image->width; x++, ptr+=channels-1) {
/* reduce pixel */
r = rtable[*ptr++];
g = gtable[*ptr++];
b = btable[*ptr++];
pixel = r*cpccpc + g*cpc + b;
/*data[ofs] = ctx->colors[pixel].pixel;*/
XPutPixel(ximg->image, x, y, ctx->colors[pixel].pixel);
}
}
} else {
/* dither */
char *err;
char *nerr;
const int dr=0xff/rmask;
const int dg=0xff/gmask;
const int db=0xff/bmask;
#ifdef DEBUG
printf("pseudo color dithering with %d colors per channel\n", cpc);
#endif
err = malloc(4*(image->width+3));
nerr = malloc(4*(image->width+3));
if (!err || !nerr) {
if (nerr)
free(nerr);
RErrorCode = RERR_NOMEMORY;
RDestroyXImage(ctx, ximg);
return NULL;
}
memset(err, 0, 4*(image->width+3));
memset(nerr, 0, 4*(image->width+3));
#ifdef ASM_X86
x86_PseudoColor_32_to_8(image->data, ximg->image->data,
err+4, nerr+4,
rtable,
dr, dg, db, ctx->pixels, cpc,
image->width, image->height,
channels,
ximg->image->bytes_per_line - image->width);
#else
convertPseudoColor_to_8(ximg, image, err+4, nerr+4,
rtable, gtable, btable,
dr, dg, db, ctx->pixels, cpc);
#endif
free(err);
free(nerr);
}
return ximg;
}
/*
* For standard colormap
*/
static RXImage*
image2StandardPseudoColor(RContext *ctx, RImage *image)
{
RXImage *ximg;
register int x, y, r, g, b;
unsigned char *ptr;
unsigned long pixel;
unsigned char *data;
unsigned int *rtable, *gtable, *btable;
unsigned int base_pixel = ctx->std_rgb_map->base_pixel;
int channels = image->format == RRGBAFormat ? 4 : 3;
/*register unsigned char maxrgb = 0xff;*/
ximg = RCreateXImage(ctx, ctx->depth, image->width, image->height);
if (!ximg) {
return NULL;
}
ptr = image->data;
data = (unsigned char *)ximg->image->data;
rtable = computeStdTable(ctx->std_rgb_map->red_mult,
ctx->std_rgb_map->red_max);
gtable = computeStdTable(ctx->std_rgb_map->green_mult,
ctx->std_rgb_map->green_max);
btable = computeStdTable(ctx->std_rgb_map->blue_mult,
ctx->std_rgb_map->blue_max);
if (rtable==NULL || gtable==NULL || btable==NULL) {
RErrorCode = RERR_NOMEMORY;
RDestroyXImage(ctx, ximg);
return NULL;
}
if (ctx->attribs->render_mode == RBestMatchRendering) {
for (y=0; y<image->height; y++) {
for (x=0; x<image->width; x++, ptr+=channels-3) {
/* reduce pixel */
pixel = (rtable[*ptr++] + gtable[*ptr++]
+ btable[*ptr++] + base_pixel) & 0xffffffff;
XPutPixel(ximg->image, x, y, pixel);
}
}
} else {
/* dither */
short *err, *nerr;
short *terr;
int rer, ger, ber;
int x1, ofs;
err = (short*)malloc(3*(image->width+2)*sizeof(short));
nerr = (short*)malloc(3*(image->width+2)*sizeof(short));
if (!err || !nerr) {
if (nerr)
free(nerr);
RErrorCode = RERR_NOMEMORY;
RDestroyXImage(ctx, ximg);
return NULL;
}
for (x=0, x1=0; x<image->width*3; x1+=channels-3) {
err[x++] = ptr[x1++];
err[x++] = ptr[x1++];
err[x++] = ptr[x1++];
}
err[x++] = err[x++] = err[x++] = 0;
/* convert and dither the image to XImage */
for (y=0, ofs=0; y<image->height; y++) {
if (y<image->height-1) {
int x1;
for (x=0, x1=(y+1)*image->width*channels;
x<image->width*3;
x1+=channels-3) {
nerr[x++] = ptr[x1++];
nerr[x++] = ptr[x1++];
nerr[x++] = ptr[x1++];
}
/* last column */
x1-=channels;
nerr[x++] = ptr[x1++];
nerr[x++] = ptr[x1++];
nerr[x++] = ptr[x1++];
}
for (x=0; x<image->width*3; x+=3, ofs++) {
/* reduce pixel */
if (err[x]>0xff) err[x]=0xff; else if (err[x]<0) err[x]=0;
if (err[x+1]>0xff) err[x+1]=0xff; else if (err[x+1]<0) err[x+1]=0;
if (err[x+2]>0xff) err[x+2]=0xff; else if (err[x+2]<0) err[x+2]=0;
r = rtable[err[x]];
g = gtable[err[x+1]];
b = btable[err[x+2]];
pixel = r + g + b;
data[ofs] = base_pixel + pixel;
/* calc error */
rer = err[x] - (ctx->colors[pixel].red>>8);
ger = err[x+1] - (ctx->colors[pixel].green>>8);
ber = err[x+2] - (ctx->colors[pixel].blue>>8);
/* distribute error */
err[x+3*1]+=(rer*7)/16;
err[x+1+3*1]+=(ger*7)/16;
err[x+2+3*1]+=(ber*7)/16;
nerr[x]+=(rer*5)/16;
nerr[x+1]+=(ger*5)/16;
nerr[x+2]+=(ber*5)/16;
if (x>0) {
nerr[x-3*1]+=(rer*3)/16;
nerr[x-3*1+1]+=(ger*3)/16;
nerr[x-3*1+2]+=(ber*3)/16;
}
nerr[x+3*1]+=rer/16;
nerr[x+1+3*1]+=ger/16;
nerr[x+2+3*1]+=ber/16;
}
/* skip to next line */
terr = err;
err = nerr;
nerr = terr;
ofs += ximg->image->bytes_per_line - image->width;
}
free(err);
free(nerr);
}
ximg->image->data = (char*)data;
return ximg;
}
static RXImage*
image2GrayScale(RContext *ctx, RImage *image)
{
RXImage *ximg;
register int x, y, g;
unsigned char *ptr;
const int cpc=ctx->attribs->colors_per_channel;
unsigned short gmask;
unsigned short *table;
unsigned char *data;
int channels = image->format == RRGBAFormat ? 4 : 3;
/*register unsigned char maxrgb = 0xff;*/
ximg = RCreateXImage(ctx, ctx->depth, image->width, image->height);
if (!ximg) {
return NULL;
}
ptr = image->data;
data = (unsigned char *)ximg->image->data;
if (ctx->vclass == StaticGray)
gmask = (1<<ctx->depth) - 1; /* use all grays */
else
gmask = cpc*cpc*cpc-1;
table = computeTable(gmask);
if (table==NULL) {
RErrorCode = RERR_NOMEMORY;
RDestroyXImage(ctx, ximg);
return NULL;
}
if (ctx->attribs->render_mode == RBestMatchRendering) {
/* fake match */
#ifdef DEBUG
printf("grayscale match with %d colors per channel\n", cpc);
#endif
for (y=0; y<image->height; y++) {
for (x=0; x<image->width; x++) {
/* reduce pixel */
g = table[(*ptr++ * 30 + *ptr++ * 59 + *ptr++ * 11)/100];
/*data[ofs] = ctx->colors[g].pixel;*/
XPutPixel(ximg->image, x, y, ctx->colors[g].pixel);
}
}
} else {
/* dither */
short *gerr;
short *ngerr;
short *terr;
int ger;
const int dg=0xff/gmask;
#ifdef DEBUG
printf("grayscale dither with %d colors per channel\n", cpc);
#endif
gerr = (short*)malloc((image->width+2)*sizeof(short));
ngerr = (short*)malloc((image->width+2)*sizeof(short));
if (!gerr || !ngerr) {
if (ngerr)
free(ngerr);
RErrorCode = RERR_NOMEMORY;
RDestroyXImage(ctx, ximg);
return NULL;
}
for (x=0; x<image->width; x++) {
gerr[x] = (ptr[x*3]*30 + ptr[x*3+1]*59 + ptr[x*3+2]*11)/100;
}
gerr[x] = 0;
/* convert and dither the image to XImage */
for (y=0; y<image->height; y++) {
if (y<image->height-1) {
int x1;
for (x=0, x1=(y+1)*image->width*3;
x<image->width;
x1+=channels-3) {
ngerr[x] = (ptr[x1++]*30 + ptr[x1++]*59 + ptr[x1++]*11)/100;
}
/* last column */
x1-=channels;
ngerr[x] = (ptr[x1++]*30 + ptr[x1++]*59 + ptr[x1++]*11)/100;
}
for (x=0; x<image->width; x++) {
/* reduce pixel */
if (gerr[x]>0xff) gerr[x]=0xff; else if (gerr[x]<0) gerr[x]=0;
g = table[gerr[x]];
/*data[ofs] = ctx->colors[g].pixel;*/
XPutPixel(ximg->image, x, y, ctx->colors[g].pixel);
/* calc error */
ger = gerr[x] - g*dg;
/* distribute error */
g = (ger*3)/8;
/* x+1, y */
gerr[x+1]+=g;
/* x, y+1 */
ngerr[x]+=g;
/* x+1, y+1 */
ngerr[x+1]+=ger-2*g;
}
/* skip to next line */
terr = gerr;
gerr = ngerr;
ngerr = terr;
}
free(gerr);
free(ngerr);
}
ximg->image->data = (char*)data;
return ximg;
}
static RXImage*
image2Bitmap(RContext *ctx, RImage *image, int threshold)
{
RXImage *ximg;
unsigned char *alpha;
int x, y;
ximg = RCreateXImage(ctx, 1, image->width, image->height);
if (!ximg) {
return NULL;
}
alpha = image->data+3;
for (y = 0; y < image->height; y++) {
for (x = 0; x < image->width; x++) {
XPutPixel(ximg->image, x, y, (*alpha <= threshold ? 0 : 1));
alpha+=4;
}
}
return ximg;
}
int
RConvertImage(RContext *context, RImage *image, Pixmap *pixmap)
{
RXImage *ximg=NULL;
#ifdef XSHM
Pixmap tmp;
#endif
assert(context!=NULL);
assert(image!=NULL);
assert(pixmap!=NULL);
/* clear error message */
if (context->vclass == TrueColor) {
ximg = image2TrueColor(context, image);
} else if (context->vclass == PseudoColor
|| context->vclass == StaticColor) {
#ifdef BENCH
cycle_bench(1);
#endif
if (context->attribs->standard_colormap_mode != RIgnoreStdColormap)
ximg = image2StandardPseudoColor(context, image);
else
ximg = image2PseudoColor(context, image);
#ifdef BENCH
cycle_bench(0);
#endif
} else if (context->vclass == GrayScale || context->vclass == StaticGray) {
ximg = image2GrayScale(context, image);
}
if (!ximg) {
return False;
}
*pixmap = XCreatePixmap(context->dpy, context->drawable, image->width,
image->height, context->depth);
#ifdef XSHM
if (context->flags.use_shared_pixmap && ximg->is_shared)
tmp = R_CreateXImageMappedPixmap(context, ximg);
else
tmp = None;
if (tmp) {
/*
* We have to copy the shm Pixmap into a normal Pixmap because
* otherwise, we would have to control when Pixmaps are freed so
* that we can detach their shm segments. This is a problem if the
* program crash, leaving stale shared memory segments in the
* system (lots of them). But with some work, we can optimize
* things and remove this XCopyArea. This will require
* explicitly freeing all pixmaps when exiting or restarting
* wmaker.
*/
XCopyArea(context->dpy, tmp, *pixmap, context->copy_gc, 0, 0,
image->width, image->height, 0, 0);
XFreePixmap(context->dpy, tmp);
} else {
RPutXImage(context, *pixmap, context->copy_gc, ximg, 0, 0, 0, 0,
image->width, image->height);
}
#else /* !XSHM */
RPutXImage(context, *pixmap, context->copy_gc, ximg, 0, 0, 0, 0,
image->width, image->height);
#endif /* !XSHM */
RDestroyXImage(context, ximg);
return True;
}
int
RConvertImageMask(RContext *context, RImage *image, Pixmap *pixmap,
Pixmap *mask, int threshold)
{
GC gc;
XGCValues gcv;
RXImage *ximg=NULL;
assert(context!=NULL);
assert(image!=NULL);
assert(pixmap!=NULL);
assert(mask!=NULL);
if (!RConvertImage(context, image, pixmap))
return False;
if (image->format==RRGBFormat) {
*mask = None;
return True;
}
ximg = image2Bitmap(context, image, threshold);
if (!ximg) {
return False;
}
*mask = XCreatePixmap(context->dpy, context->drawable, image->width,
image->height, 1);
gcv.foreground = context->black;
gcv.background = context->white;
gcv.graphics_exposures = False;
gc = XCreateGC(context->dpy, *mask, GCForeground|GCBackground
|GCGraphicsExposures, &gcv);
RPutXImage(context, *mask, gc, ximg, 0, 0, 0, 0,
image->width, image->height);
RDestroyXImage(context, ximg);
return True;
}
Bool
RGetClosestXColor(RContext *context, RColor *color, XColor *retColor)
{
if (context->vclass == TrueColor) {
unsigned short rmask, gmask, bmask;
unsigned short roffs, goffs, boffs;
unsigned short *rtable, *gtable, *btable;
roffs = context->red_offset;
goffs = context->green_offset;
boffs = context->blue_offset;
rmask = context->visual->red_mask >> roffs;
gmask = context->visual->green_mask >> goffs;
bmask = context->visual->blue_mask >> boffs;
rtable = computeTable(rmask);
gtable = computeTable(gmask);
btable = computeTable(bmask);
retColor->pixel = (rtable[color->red]<<roffs) |
(gtable[color->green]<<goffs) | (btable[color->blue]<<boffs);
retColor->red = color->red << 8;
retColor->green = color->green << 8;
retColor->blue = color->blue << 8;
retColor->flags = DoRed|DoGreen|DoBlue;
} else if (context->vclass == PseudoColor
|| context->vclass == StaticColor) {
if (context->attribs->standard_colormap_mode != RIgnoreStdColormap) {
unsigned int *rtable, *gtable, *btable;
rtable = computeStdTable(context->std_rgb_map->red_mult,
context->std_rgb_map->red_max);
gtable = computeStdTable(context->std_rgb_map->green_mult,
context->std_rgb_map->green_max);
btable = computeStdTable(context->std_rgb_map->blue_mult,
context->std_rgb_map->blue_max);
if (rtable==NULL || gtable==NULL || btable==NULL) {
RErrorCode = RERR_NOMEMORY;
return False;
}
retColor->pixel = (rtable[color->red]
+ gtable[color->green]
+ btable[color->blue]
+ context->std_rgb_map->base_pixel) & 0xffffffff;
retColor->red = color->red<<8;
retColor->green = color->green<<8;
retColor->blue = color->blue<<8;
retColor->flags = DoRed|DoGreen|DoBlue;
} else {
const int cpc=context->attribs->colors_per_channel;
const unsigned short rmask = cpc-1; /* different sizes could be used */
const unsigned short gmask = rmask; /* for r,g,b */
const unsigned short bmask = rmask;
unsigned short *rtable, *gtable, *btable;
const int cpccpc = cpc*cpc;
int index;
rtable = computeTable(rmask);
gtable = computeTable(gmask);
btable = computeTable(bmask);
if (rtable==NULL || gtable==NULL || btable==NULL) {
RErrorCode = RERR_NOMEMORY;
return False;
}
index = rtable[color->red]*cpccpc + gtable[color->green]*cpc
+ btable[color->blue];
*retColor = context->colors[index];
}
} else if (context->vclass == GrayScale || context->vclass == StaticGray) {
const int cpc = context->attribs->colors_per_channel;
unsigned short gmask;
unsigned short *table;
int index;
if (context->vclass == StaticGray)
gmask = (1<<context->depth) - 1; /* use all grays */
else
gmask = cpc*cpc*cpc-1;
table = computeTable(gmask);
if (!table)
return False;
index = table[(color->red*30 + color->green*59 + color->blue*11)/100];
*retColor = context->colors[index];
} else {
RErrorCode = RERR_INTERNAL;
return False;
}
return True;
}
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