mirror of
https://github.com/gryf/wmaker.git
synced 2026-01-07 14:24:14 +01:00
changed indentation to use spaces only
This commit is contained in:
dan
318
wrlib/draw.c
318
wrlib/draw.c
@@ -1,7 +1,7 @@
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/* draw.c - pixel plotting, line drawing
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*
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*
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* Raster graphics library
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*
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*
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* Copyright (c) 1998-2003 Dan Pascu
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* Copyright (c) 2000-2003 Alfredo K. Kojima
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*
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@@ -9,12 +9,12 @@
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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@@ -44,22 +44,22 @@ RGetPixel(RImage *image, int x, int y, RColor *color)
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assert(image!=NULL);
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if (x < 0 || x >= image->width
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|| y < 0 || y >= image->height)
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return False;
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|| y < 0 || y >= image->height)
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return False;
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if (image->format == RRGBAFormat) {
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ofs = (y*image->width + x) * 4;
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color->red = image->data[ofs++];
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color->green = image->data[ofs++];
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color->blue = image->data[ofs++];
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color->alpha = image->data[ofs];
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ofs = (y*image->width + x) * 4;
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color->red = image->data[ofs++];
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color->green = image->data[ofs++];
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color->blue = image->data[ofs++];
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color->alpha = image->data[ofs];
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} else {
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ofs = (y*image->width + x) * 3;
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color->red = image->data[ofs++];
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color->green = image->data[ofs++];
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color->blue = image->data[ofs];
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/* If the image does not have alpha channel, we consider alpha 255 */
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color->alpha = 255;
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ofs = (y*image->width + x) * 3;
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color->red = image->data[ofs++];
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color->green = image->data[ofs++];
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color->blue = image->data[ofs];
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/* If the image does not have alpha channel, we consider alpha 255 */
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color->alpha = 255;
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}
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return True;
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@@ -74,21 +74,21 @@ RPutPixel(RImage *image, int x, int y, RColor *color)
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assert(image!=NULL);
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assert(color!=NULL);
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if (x < 0 || x >= image->width || y < 0 || y >= image->height)
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return;
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return;
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if (image->format == RRGBAFormat) {
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ptr = image->data + (y*image->width + x) * 4;
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ptr = image->data + (y*image->width + x) * 4;
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} else {
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ptr = image->data + (y*image->width + x) * 3;
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ptr = image->data + (y*image->width + x) * 3;
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}
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if (color->alpha==255) {
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*ptr++ = color->red;
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*ptr++ = color->red;
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*ptr++ = color->green;
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*ptr++ = color->blue;
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if (image->format == RRGBAFormat) {
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*ptr = 255;
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}
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if (image->format == RRGBAFormat) {
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*ptr = 255;
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}
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} else {
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register int alpha, nalpha, r, g, b;
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@@ -103,7 +103,7 @@ RPutPixel(RImage *image, int x, int y, RColor *color)
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*ptr = (((int)*ptr * nalpha) + (b * alpha))/256; ptr++;
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if (image->format == RRGBAFormat) {
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*ptr = alpha + ((int)*ptr * nalpha)/256;
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}
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}
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}
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}
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@@ -122,55 +122,55 @@ operatePixel(RImage *image, int ofs, int operation, RColor *color)
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sg = image->data + ofs*(hasAlpha ? 4 : 3) + 1;
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sb = image->data + ofs*(hasAlpha ? 4 : 3) + 2;
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sa = image->data + ofs*(hasAlpha ? 4 : 3) + 3;
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switch (operation) {
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case RClearOperation:
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*sr = 0;
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*sg = 0;
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*sb = 0;
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if (hasAlpha)
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*sa = 0;
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break;
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case RCopyOperation:
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*sr = color->red;
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*sg = color->green;
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*sb = color->blue;
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if (hasAlpha)
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*sa = color->alpha;
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break;
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case RNormalOperation:
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if (color->alpha==255) {
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*sr = color->red;
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*sg = color->green;
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*sb = color->blue;
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if (hasAlpha)
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*sa = 255;
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} else {
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*sr = (((int)*sr * nalpha) + ((int)color->red * alpha))/256;
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*sg = (((int)*sg * nalpha) + ((int)color->green * alpha))/256;
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*sb = (((int)*sb * nalpha) + ((int)color->blue * alpha))/256;
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}
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break;
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case RAddOperation:
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tmp = color->red + *sr;
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*sr = MIN(255, tmp);
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tmp = color->green + *sg;
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*sg = MIN(255, tmp);
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tmp = color->blue + *sb;
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*sb = MIN(255, tmp);
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if (hasAlpha)
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*sa = MIN(*sa, color->alpha);
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break;
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case RSubtractOperation:
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tmp = *sr - color->red;
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*sr = MAX(0, tmp);
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tmp = *sg - color->green;
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*sg = MAX(0, tmp);
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tmp = *sb - color->blue;
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*sb = MAX(0, tmp);
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if (hasAlpha)
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*sa = MIN(*sa, color->alpha);
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break;
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case RClearOperation:
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*sr = 0;
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*sg = 0;
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*sb = 0;
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if (hasAlpha)
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*sa = 0;
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break;
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case RCopyOperation:
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*sr = color->red;
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*sg = color->green;
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*sb = color->blue;
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if (hasAlpha)
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*sa = color->alpha;
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break;
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case RNormalOperation:
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if (color->alpha==255) {
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*sr = color->red;
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*sg = color->green;
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*sb = color->blue;
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if (hasAlpha)
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*sa = 255;
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} else {
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*sr = (((int)*sr * nalpha) + ((int)color->red * alpha))/256;
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*sg = (((int)*sg * nalpha) + ((int)color->green * alpha))/256;
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*sb = (((int)*sb * nalpha) + ((int)color->blue * alpha))/256;
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}
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break;
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case RAddOperation:
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tmp = color->red + *sr;
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*sr = MIN(255, tmp);
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tmp = color->green + *sg;
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*sg = MIN(255, tmp);
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tmp = color->blue + *sb;
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*sb = MIN(255, tmp);
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if (hasAlpha)
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*sa = MIN(*sa, color->alpha);
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break;
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case RSubtractOperation:
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tmp = *sr - color->red;
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*sr = MAX(0, tmp);
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tmp = *sg - color->green;
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*sg = MAX(0, tmp);
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tmp = *sb - color->blue;
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*sb = MAX(0, tmp);
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if (hasAlpha)
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*sa = MIN(*sa, color->alpha);
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break;
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}
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}
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@@ -187,7 +187,7 @@ ROperatePixel(RImage *image, int operation, int x, int y, RColor *color)
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assert(y >= 0 && y < image->height);
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ofs = y*image->width + x;
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operatePixel(image, ofs, operation, color);
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}
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@@ -216,8 +216,8 @@ RPutPixels(RImage *image, RPoint *points, int npoints, int mode, RColor *color)
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void
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ROperatePixels(RImage *image, int operation, RPoint *points, int npoints,
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int mode, RColor *color)
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ROperatePixels(RImage *image, int operation, RPoint *points, int npoints,
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int mode, RColor *color)
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{
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register int x, y, i;
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@@ -241,14 +241,14 @@ ROperatePixels(RImage *image, int operation, RPoint *points, int npoints,
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static Bool
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clipLineInRectangle(int xmin, int ymin, int xmax, int ymax,
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int *x1, int *y1, int *x2, int *y2)
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int *x1, int *y1, int *x2, int *y2)
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{
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#define TOP (1<<0)
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#define BOT (1<<1)
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#define LEF (1<<2)
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#define RIG (1<<3)
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#define CHECK_OUT(X,Y) (((Y) > ymax ? TOP : ((Y) < ymin ? BOT : 0))\
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| ((X) > xmax ? RIG : ((X) < xmin ? LEF : 0)))
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| ((X) > xmax ? RIG : ((X) < xmin ? LEF : 0)))
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int ocode1, ocode2, ocode;
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int accept = 0;
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@@ -258,43 +258,43 @@ clipLineInRectangle(int xmin, int ymin, int xmax, int ymax,
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ocode2 = CHECK_OUT(*x2, *y2);
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for(;;) {
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if (!ocode1 && !ocode2) { /* completely inside */
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accept = 1;
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break;
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} else if (ocode1 & ocode2) {
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break;
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}
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if (!ocode1 && !ocode2) { /* completely inside */
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accept = 1;
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break;
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} else if (ocode1 & ocode2) {
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break;
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}
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if (ocode1)
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ocode = ocode1;
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else
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ocode = ocode2;
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if (ocode1)
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ocode = ocode1;
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else
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ocode = ocode2;
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if (ocode & TOP) {
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x = *x1 + (*x2 - *x1) * (ymax - *y1) / (*y2 - *y1);
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y = ymax;
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} else if (ocode & BOT) {
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x = *x1 + (*x2 - *x1) * (ymin - *y1) / (*y2 - *y1);
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y = ymin;
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} else if (ocode & RIG) {
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y = *y1 + (*y2 - *y1) * (xmax - *x1) / (*x2 - *x1);
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x = xmax;
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if (ocode & TOP) {
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x = *x1 + (*x2 - *x1) * (ymax - *y1) / (*y2 - *y1);
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y = ymax;
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} else if (ocode & BOT) {
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x = *x1 + (*x2 - *x1) * (ymin - *y1) / (*y2 - *y1);
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y = ymin;
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} else if (ocode & RIG) {
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y = *y1 + (*y2 - *y1) * (xmax - *x1) / (*x2 - *x1);
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x = xmax;
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} else { //if (ocode & LEF) {
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y = *y1 + (*y2 - *y1) * (xmax - *x1) / (*x2 - *x1);
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x = xmin;
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}
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y = *y1 + (*y2 - *y1) * (xmax - *x1) / (*x2 - *x1);
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x = xmin;
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}
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if (ocode == ocode1) {
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*x1 = x;
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*y1 = y;
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ocode1 = CHECK_OUT(x, y);
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} else {
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*x2 = x;
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*y2 = y;
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ocode2 = CHECK_OUT(x, y);
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}
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if (ocode == ocode1) {
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*x1 = x;
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*y1 = y;
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ocode1 = CHECK_OUT(x, y);
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} else {
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*x2 = x;
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*y2 = y;
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ocode2 = CHECK_OUT(x, y);
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}
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}
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return accept;
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}
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@@ -312,8 +312,8 @@ genericLine(RImage *image, int x0, int y0, int x1, int y1, RColor *color,
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assert(image!=NULL);
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if (!clipLineInRectangle(0, 0, image->width-1, image->height-1,
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&x0, &y0, &x1, &y1))
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return True;
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&x0, &y0, &x1, &y1))
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return True;
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if (x0 < x1) {
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du = x1 - x0;
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@@ -342,53 +342,53 @@ genericLine(RImage *image, int x0, int y0, int x1, int y1, RColor *color,
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last = (polyline) ? du-1 : du;
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if (color->alpha==255 || operation==RCopyOperation) {
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unsigned char *ptr;
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unsigned char *ptr;
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if (image->format == RRGBAFormat)
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i = (y0*image->width + x0) * 4;
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else
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i = (y0*image->width + x0) * 3;
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ptr = image->data + i;
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if (image->format == RRGBAFormat)
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i = (y0*image->width + x0) * 4;
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else
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i = (y0*image->width + x0) * 3;
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ptr = image->data + i;
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for (i=0; i<=last; i++) {
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/* Draw the pixel */
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*ptr = color->red;
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*(ptr+1) = color->green;
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*(ptr+2) = color->blue;
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if (image->format == RRGBAFormat)
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*(ptr+3) = 255;
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for (i=0; i<=last; i++) {
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/* Draw the pixel */
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*ptr = color->red;
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*(ptr+1) = color->green;
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*(ptr+2) = color->blue;
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if (image->format == RRGBAFormat)
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*(ptr+3) = 255;
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/* Compute error for NeXT Step */
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err += dv2;
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if (err >= du) {
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if (image->format == RRGBAFormat)
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ptr += vofs*4;
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else
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ptr += vofs*3;
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err -= du2;
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}
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if (image->format == RRGBAFormat)
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ptr += uofs*4;
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else
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ptr += uofs*3;
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}
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/* Compute error for NeXT Step */
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err += dv2;
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if (err >= du) {
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if (image->format == RRGBAFormat)
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ptr += vofs*4;
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else
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ptr += vofs*3;
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err -= du2;
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}
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if (image->format == RRGBAFormat)
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ptr += uofs*4;
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else
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ptr += uofs*3;
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}
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} else {
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register int ofs = y0*image->width + x0;
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for (i=0; i<=last; i++) {
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/* Draw the pixel */
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operatePixel(image, ofs, operation, color);
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/* Compute error for NeXT Step */
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err += dv2;
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if (err >= du) {
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ofs += vofs;
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err -= du2;
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}
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ofs += uofs;
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}
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register int ofs = y0*image->width + x0;
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for (i=0; i<=last; i++) {
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/* Draw the pixel */
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operatePixel(image, ofs, operation, color);
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/* Compute error for NeXT Step */
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err += dv2;
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if (err >= du) {
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ofs += vofs;
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err -= du2;
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}
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ofs += uofs;
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}
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}
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#if 0
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if (mode == RALTER_PIXELS) {
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RColorOffset *cdelta = (RColorOffset*)cdata;
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@@ -485,8 +485,8 @@ RDrawLine(RImage *image, int x0, int y0, int x1, int y1, RColor *color)
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int
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ROperateLine(RImage *image, int operation, int x0, int y0, int x1,
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int y1, RColor *color)
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ROperateLine(RImage *image, int operation, int x0, int y0, int x1,
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int y1, RColor *color)
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{
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return genericLine(image, x0, y0, x1, y1, color, operation, False);
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}
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@@ -534,7 +534,7 @@ RDrawLines(RImage *image, RPoint *points, int npoints, int mode, RColor *color)
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void
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ROperateLines(RImage *image, int operation, RPoint *points,
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int npoints, int mode, RColor *color)
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int npoints, int mode, RColor *color)
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{
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register int x1, y1, x2, y2, i;
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@@ -589,8 +589,8 @@ RDrawSegments(RImage *image, RSegment *segs, int nsegs, RColor *color)
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void
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ROperateSegments(RImage *image, int operation, RSegment *segs,
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int nsegs, RColor *color)
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ROperateSegments(RImage *image, int operation, RSegment *segs,
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int nsegs, RColor *color)
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{
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register int i;
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|
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