mirror of
https://github.com/gryf/wmaker.git
synced 2025-12-19 04:20:27 +01:00
Initial revision
This commit is contained in:
scottc
529
wrlib/raster.c
Normal file
529
wrlib/raster.c
Normal file
@@ -0,0 +1,529 @@
|
||||
/* raster.c - main and other misc stuff
|
||||
*
|
||||
* Raster graphics library
|
||||
*
|
||||
* Copyright (c) 1997 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 <stdlib.h>
|
||||
#include <stdio.h>
|
||||
#include <string.h>
|
||||
#include <X11/Xlib.h>
|
||||
#include "wraster.h"
|
||||
|
||||
#include <assert.h>
|
||||
|
||||
#define MAXERRLEN 512
|
||||
|
||||
|
||||
char *WRasterLibVersion="0.2";
|
||||
|
||||
char RErrorString[MAXERRLEN];
|
||||
|
||||
|
||||
|
||||
RImage*
|
||||
RCreateImage(unsigned width, unsigned height, int alpha)
|
||||
{
|
||||
RImage *image=NULL;
|
||||
int i;
|
||||
|
||||
assert(width>0 && height>0);
|
||||
|
||||
image = malloc(sizeof(RImage));
|
||||
if (!image) {
|
||||
sprintf(RErrorString, "out of memory");
|
||||
return NULL;
|
||||
}
|
||||
|
||||
memset(image, 0, sizeof(RImage));
|
||||
image->width = width;
|
||||
image->height = height;
|
||||
for (i=0; i<3+(alpha?1:0); i++) {
|
||||
image->data[i] = malloc(width*height);
|
||||
if (!image->data[i])
|
||||
goto error;
|
||||
}
|
||||
return image;
|
||||
|
||||
error:
|
||||
for (i=0; i<4; i++) {
|
||||
if (image->data[i])
|
||||
free(image->data[i]);
|
||||
}
|
||||
if (image)
|
||||
free(image);
|
||||
sprintf(RErrorString, "out of memory");
|
||||
return NULL;
|
||||
}
|
||||
|
||||
|
||||
|
||||
RImage*
|
||||
RCloneImage(RImage *image)
|
||||
{
|
||||
RImage *new_image;
|
||||
|
||||
assert(image!=NULL);
|
||||
|
||||
new_image = RCreateImage(image->width, image->height, image->data[3]!=NULL);
|
||||
if (!new_image)
|
||||
return NULL;
|
||||
|
||||
new_image->background = image->background;
|
||||
memcpy(new_image->data[0], image->data[0], image->width*image->height);
|
||||
memcpy(new_image->data[1], image->data[1], image->width*image->height);
|
||||
memcpy(new_image->data[2], image->data[2], image->width*image->height);
|
||||
if (image->data[3])
|
||||
memcpy(new_image->data[3], image->data[3], image->width*image->height);
|
||||
|
||||
return new_image;
|
||||
}
|
||||
|
||||
|
||||
RImage*
|
||||
RGetSubImage(RImage *image, int x, int y, unsigned width, unsigned height)
|
||||
{
|
||||
int i, ofs;
|
||||
RImage *new_image;
|
||||
unsigned char *sr, *sg, *sb, *sa;
|
||||
unsigned char *dr, *dg, *db, *da;
|
||||
|
||||
assert(image!=NULL);
|
||||
assert(x>=0 && y>=0);
|
||||
assert(x<image->width && y<image->height);
|
||||
assert(width>0 && height>0);
|
||||
|
||||
if (x+width > image->width)
|
||||
width = image->width-x;
|
||||
if (y+height > image->height)
|
||||
height = image->height-y;
|
||||
|
||||
new_image = RCreateImage(width, height, image->data[3]!=NULL);
|
||||
if (!new_image)
|
||||
return NULL;
|
||||
new_image->background = image->background;
|
||||
ofs = image->width*y+x;
|
||||
|
||||
sr = image->data[0]+ofs;
|
||||
sg = image->data[1]+ofs;
|
||||
sb = image->data[2]+ofs;
|
||||
sa = image->data[3]+ofs;
|
||||
|
||||
dr = new_image->data[0];
|
||||
dg = new_image->data[1];
|
||||
db = new_image->data[2];
|
||||
da = new_image->data[3];
|
||||
|
||||
for (i=0; i<height; i++) {
|
||||
memcpy(dr, sr, width);
|
||||
memcpy(dg, sg, width);
|
||||
memcpy(db, sb, width);
|
||||
sr += image->width;
|
||||
sg += image->width;
|
||||
sb += image->width;
|
||||
dr += width;
|
||||
dg += width;
|
||||
db += width;
|
||||
if (da) {
|
||||
memcpy(da, sa, width);
|
||||
sa += image->width;
|
||||
da += width;
|
||||
}
|
||||
}
|
||||
return new_image;
|
||||
}
|
||||
|
||||
|
||||
void
|
||||
RDestroyImage(RImage *image)
|
||||
{
|
||||
int i;
|
||||
|
||||
assert(image!=NULL);
|
||||
|
||||
for (i=0; i<4; i++) {
|
||||
if (image->data[i])
|
||||
free(image->data[i]);
|
||||
}
|
||||
free(image);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
*----------------------------------------------------------------------
|
||||
* RCombineImages-
|
||||
* Combines two equal sized images with alpha image. The second
|
||||
* image will be placed on top of the first one.
|
||||
*----------------------------------------------------------------------
|
||||
*/
|
||||
void
|
||||
RCombineImages(RImage *image, RImage *src)
|
||||
{
|
||||
register int i;
|
||||
unsigned char *dr, *dg, *db, *da;
|
||||
unsigned char *sr, *sg, *sb, *sa;
|
||||
int alpha, calpha;
|
||||
|
||||
|
||||
assert(image->width == src->width);
|
||||
assert(image->height == src->height);
|
||||
|
||||
dr = image->data[0];
|
||||
dg = image->data[1];
|
||||
db = image->data[2];
|
||||
da = image->data[3];
|
||||
|
||||
sr = src->data[0];
|
||||
sg = src->data[1];
|
||||
sb = src->data[2];
|
||||
sa = src->data[3];
|
||||
|
||||
if (!sa) {
|
||||
memcpy(dr, sr, image->height*image->width);
|
||||
memcpy(dg, sg, image->height*image->width);
|
||||
memcpy(db, sb, image->height*image->width);
|
||||
} else {
|
||||
for (i=0; i<image->height*image->width; i++) {
|
||||
alpha = *sa;
|
||||
calpha = 255 - *sa;
|
||||
*dr = (((int)*dr * calpha) + ((int)*sr * alpha))/256;
|
||||
*dg = (((int)*dg * calpha) + ((int)*sg * alpha))/256;
|
||||
*db = (((int)*db * calpha) + ((int)*sb * alpha))/256;
|
||||
if (image->data[3])
|
||||
*da |= *sa;
|
||||
dr++; dg++; db++;
|
||||
sr++; sg++; sb++;
|
||||
sa++;
|
||||
da++;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
void
|
||||
RCombineImagesWithOpaqueness(RImage *image, RImage *src, int opaqueness)
|
||||
{
|
||||
register int i;
|
||||
unsigned char *dr, *dg, *db;
|
||||
unsigned char *sr, *sg, *sb, *sa;
|
||||
int c_opaqueness;
|
||||
|
||||
|
||||
assert(image->width == src->width);
|
||||
assert(image->height == src->height);
|
||||
|
||||
dr = image->data[0];
|
||||
dg = image->data[1];
|
||||
db = image->data[2];
|
||||
|
||||
sr = src->data[0];
|
||||
sg = src->data[1];
|
||||
sb = src->data[2];
|
||||
sa = src->data[3];
|
||||
|
||||
c_opaqueness = 255 - opaqueness;
|
||||
#define OP opaqueness
|
||||
if (!src->data[3]) {
|
||||
#define COP c_opaqueness
|
||||
for (i=0; i<image->width*image->height; i++) {
|
||||
*dr = (((int)*dr *(int)COP) + ((int)*sr *(int)OP))/256;
|
||||
*dg = (((int)*dg *(int)COP) + ((int)*sg *(int)OP))/256;
|
||||
*db = (((int)*db *(int)COP) + ((int)*sb *(int)OP))/256;
|
||||
dr++; dg++; db++;
|
||||
sr++; sg++; sb++;
|
||||
}
|
||||
#undef COP
|
||||
} else {
|
||||
int tmp;
|
||||
|
||||
for (i=0; i<image->width*image->height; i++) {
|
||||
tmp= (*sa * opaqueness)/256;
|
||||
*dr = (((int)*dr *(int)(255-tmp)) + ((int)*sr *(int)tmp))/256;
|
||||
*dg = (((int)*dg *(int)(255-tmp)) + ((int)*sg *(int)tmp))/256;
|
||||
*db = (((int)*db *(int)(255-tmp)) + ((int)*sb *(int)tmp))/256;
|
||||
dr++; dg++; db++;
|
||||
sr++; sg++; sb++;
|
||||
sa++;
|
||||
}
|
||||
}
|
||||
#undef OP
|
||||
}
|
||||
|
||||
|
||||
void
|
||||
RCombineArea(RImage *image, RImage *src, int sx, int sy, unsigned width,
|
||||
unsigned height, int dx, int dy)
|
||||
{
|
||||
int x, y, dwi, swi;
|
||||
unsigned char *dr, *dg, *db;
|
||||
unsigned char *sr, *sg, *sb, *sa;
|
||||
int alpha, calpha;
|
||||
|
||||
|
||||
assert(dy < image->height);
|
||||
assert(dx < image->width);
|
||||
|
||||
assert(sy + height <= src->height);
|
||||
assert(sx + width <= src->width);
|
||||
|
||||
dr = image->data[0] + dy*(int)image->width + dx;
|
||||
dg = image->data[1] + dy*(int)image->width + dx;
|
||||
db = image->data[2] + dy*(int)image->width + dx;
|
||||
|
||||
sr = src->data[0] + sy*(int)src->width + sx;
|
||||
sg = src->data[1] + sy*(int)src->width + sx;
|
||||
sb = src->data[2] + sy*(int)src->width + sx;
|
||||
sa = src->data[3] + sy*(int)src->width + sx;
|
||||
|
||||
swi = src->width - width;
|
||||
dwi = image->width - width;
|
||||
|
||||
if (height > image->height - dy)
|
||||
height = image->height - dy;
|
||||
|
||||
if (!src->data[3]) {
|
||||
for (y=sy; y<height+sy; y++) {
|
||||
for (x=sx; x<width+sx; x++) {
|
||||
*(dr++) = *(sr++);
|
||||
*(dg++) = *(sg++);
|
||||
*(db++) = *(sb++);
|
||||
}
|
||||
dr += dwi; dg += dwi; db += dwi;
|
||||
sr += swi; sg += swi; sb += swi;
|
||||
}
|
||||
} else {
|
||||
for (y=sy; y<height+sy; y++) {
|
||||
for (x=sx; x<width+sx; x++) {
|
||||
alpha = *sa;
|
||||
calpha = 255 - alpha;
|
||||
*dr = (((int)*dr * calpha) + ((int)*sr * alpha))/256;
|
||||
*dg = (((int)*dg * calpha) + ((int)*sg * alpha))/256;
|
||||
*db = (((int)*db * calpha) + ((int)*sb * alpha))/256;
|
||||
dr++; dg++; db++;
|
||||
sr++; sg++; sb++;
|
||||
sa++;
|
||||
}
|
||||
dr += dwi; dg += dwi; db += dwi;
|
||||
sr += swi; sg += swi; sb += swi;
|
||||
sa += swi;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void
|
||||
RCombineAreaWithOpaqueness(RImage *image, RImage *src, int sx, int sy,
|
||||
unsigned width, unsigned height, int dx, int dy,
|
||||
int opaqueness)
|
||||
{
|
||||
int x, y, dwi, swi;
|
||||
int c_opaqueness;
|
||||
unsigned char *dr, *dg, *db;
|
||||
unsigned char *sr, *sg, *sb, *sa;
|
||||
|
||||
assert(dy <= image->height);
|
||||
assert(dx <= image->width);
|
||||
|
||||
assert(sy <= height);
|
||||
assert(sx <= width);
|
||||
|
||||
dr = image->data[0] + dy*image->width + dx;
|
||||
dg = image->data[1] + dy*image->width + dx;
|
||||
db = image->data[2] + dy*image->width + dx;
|
||||
|
||||
sr = src->data[0] + sy*src->width;
|
||||
sg = src->data[1] + sy*src->width;
|
||||
sb = src->data[2] + sy*src->width;
|
||||
sa = src->data[3] + sy*src->width;
|
||||
|
||||
swi = src->width - width;
|
||||
dwi = image->width - width;
|
||||
|
||||
/* clip */
|
||||
width -= sx;
|
||||
height -= sy;
|
||||
|
||||
if (height > image->height - dy)
|
||||
height = image->height - dy;
|
||||
|
||||
c_opaqueness = 255 - opaqueness;
|
||||
#define OP opaqueness
|
||||
if (!src->data[3]) {
|
||||
#define COP c_opaqueness
|
||||
for (y=0; y<height; y++) {
|
||||
for (x=0; x<width; x++) {
|
||||
*dr = (((int)*dr *(int)COP) + ((int)*sr *(int)OP))/256;
|
||||
*dg = (((int)*dg *(int)COP) + ((int)*sg *(int)OP))/256;
|
||||
*db = (((int)*db *(int)COP) + ((int)*sb *(int)OP))/256;
|
||||
dr++; dg++; db++;
|
||||
sr++; sg++; sb++;
|
||||
}
|
||||
dr += dwi; dg += dwi; db += dwi;
|
||||
sr += swi; sg += swi; sb += swi;
|
||||
}
|
||||
#undef COP
|
||||
} else {
|
||||
int tmp;
|
||||
|
||||
for (y=0; y<height; y++) {
|
||||
for (x=0; x<width; x++) {
|
||||
tmp= (*sa * opaqueness)/256;
|
||||
*dr = (((int)*dr *(int)(255-tmp)) + ((int)*sr *(int)tmp))/256;
|
||||
*dg = (((int)*dg *(int)(255-tmp)) + ((int)*sg *(int)tmp))/256;
|
||||
*db = (((int)*db *(int)(255-tmp)) + ((int)*sb *(int)tmp))/256;
|
||||
dr++; dg++; db++;
|
||||
sr++; sg++; sb++;
|
||||
sa++;
|
||||
}
|
||||
dr += dwi; dg += dwi; db += dwi;
|
||||
sr += swi; sg += swi; sb += swi;
|
||||
sa += swi;
|
||||
}
|
||||
}
|
||||
#undef OP
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
void
|
||||
RCombineImageWithColor(RImage *image, RColor *color)
|
||||
{
|
||||
register int i;
|
||||
unsigned char *dr, *dg, *db, *da;
|
||||
int alpha, nalpha, r, g, b;
|
||||
|
||||
dr = image->data[0];
|
||||
dg = image->data[1];
|
||||
db = image->data[2];
|
||||
da = image->data[3];
|
||||
|
||||
if (!da) {
|
||||
/* Image has no alpha channel, so we consider it to be all 255 */
|
||||
return;
|
||||
}
|
||||
r = color->red;
|
||||
g = color->green;
|
||||
b = color->blue;
|
||||
|
||||
for (i=0; i<image->width*image->height; i++) {
|
||||
alpha = *da;
|
||||
nalpha = 255 - alpha;
|
||||
|
||||
*dr = (((int)*dr * alpha) + (r * nalpha))/256;
|
||||
*dg = (((int)*dg * alpha) + (g * nalpha))/256;
|
||||
*db = (((int)*db * alpha) + (b * nalpha))/256;
|
||||
dr++; dg++; db++; da++;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
RImage*
|
||||
RMakeTiledImage(RImage *tile, unsigned width, unsigned height)
|
||||
{
|
||||
int x, y;
|
||||
unsigned w;
|
||||
unsigned long tile_size = tile->width * tile->height;
|
||||
unsigned long tx = 0;
|
||||
int have_alpha = (tile->data[3]!=NULL);
|
||||
RImage *image;
|
||||
unsigned char *sr, *sg, *sb, *sa;
|
||||
unsigned char *dr, *dg, *db, *da;
|
||||
|
||||
if (width == tile->width && height == tile->height)
|
||||
image = RCloneImage(tile);
|
||||
else if (width <= tile->width && height <= tile->height)
|
||||
image = RGetSubImage(tile, 0, 0, width, height);
|
||||
else {
|
||||
|
||||
image = RCreateImage(width, height, have_alpha);
|
||||
|
||||
dr = image->data[0];
|
||||
dg = image->data[1];
|
||||
db = image->data[2];
|
||||
da = image->data[3];
|
||||
|
||||
sr = tile->data[0];
|
||||
sg = tile->data[1];
|
||||
sb = tile->data[2];
|
||||
sa = tile->data[3];
|
||||
|
||||
for (y = 0; y < height; y++) {
|
||||
for (x = 0; x < width; x += tile->width) {
|
||||
|
||||
w = (width - x < tile->width) ? width - x : tile->width;
|
||||
|
||||
memcpy(dr, sr+tx, w);
|
||||
memcpy(dg, sg+tx, w);
|
||||
memcpy(db, sb+tx, w);
|
||||
if (have_alpha) {
|
||||
memcpy(da, sa+tx, w);
|
||||
da += w;
|
||||
}
|
||||
|
||||
dr += w;
|
||||
dg += w;
|
||||
db += w;
|
||||
|
||||
}
|
||||
tx = (tx + tile->width) % tile_size;
|
||||
}
|
||||
}
|
||||
return image;
|
||||
}
|
||||
|
||||
|
||||
RImage*
|
||||
RMakeCenteredImage(RImage *image, unsigned width, unsigned height, RColor *color)
|
||||
{
|
||||
int x, y, w, h, sx, sy;
|
||||
RImage *tmp;
|
||||
|
||||
tmp = RCreateImage(width, height, False);
|
||||
if (!tmp) {
|
||||
return NULL;
|
||||
}
|
||||
|
||||
RClearImage(tmp, color);
|
||||
|
||||
if (image->height < height) {
|
||||
h = image->height;
|
||||
y = (height - h)/2;
|
||||
sy = 0;
|
||||
} else {
|
||||
sy = (image->height - height)/2;
|
||||
y = 0;
|
||||
h = height;
|
||||
}
|
||||
if (image->width < width) {
|
||||
w = image->width;
|
||||
x = (width - w)/2;
|
||||
sx = 0;
|
||||
} else {
|
||||
sx = (image->width - width)/2;
|
||||
x = 0;
|
||||
w = width;
|
||||
}
|
||||
RCombineArea(tmp, image, sx, sy, w, h, x, y);
|
||||
|
||||
return tmp;
|
||||
}
|
||||
Reference in New Issue
Block a user