From 1131e66adee8f10ea019d4ed31a5a4f44efe0cab Mon Sep 17 00:00:00 2001
From: Christophe Geuzaine <cgeuzaine@ulg.ac.be>
Date: Thu, 21 Dec 2000 10:28:29 +0000
Subject: [PATCH] by row
---
Graphics/gl2ppm.cpp | 34 +++++++++++-----------------------
1 file changed, 11 insertions(+), 23 deletions(-)
diff --git a/Graphics/gl2ppm.cpp b/Graphics/gl2ppm.cpp
index 99f29ad10f..565fc71e1b 100644
--- a/Graphics/gl2ppm.cpp
+++ b/Graphics/gl2ppm.cpp
@@ -3,35 +3,23 @@
#include "GmshUI.h"
void create_ppm(FILE *outfile, int width, int height){
- unsigned char *red, *green, *blue;
- register int x, y;
- unsigned char r, g, b;
-
- red = (unsigned char *)malloc(height*width*sizeof(unsigned char));
- green = (unsigned char *)malloc(height*width*sizeof(unsigned char));
- blue = (unsigned char *)malloc(height*width*sizeof(unsigned char));
-
- glReadPixels(0,0,width,height,GL_RED,GL_UNSIGNED_BYTE,red);
- glReadPixels(0,0,width,height,GL_GREEN,GL_UNSIGNED_BYTE,green);
- glReadPixels(0,0,width,height,GL_BLUE,GL_UNSIGNED_BYTE,blue);
+ unsigned char *pixels;
+ int i, row_stride;
+
+ pixels=(unsigned char *)Malloc(height*width*3);
+ glReadPixels(0,0,width,height,GL_RGB,GL_UNSIGNED_BYTE,pixels);
fprintf(outfile, "P6\n");
fprintf(outfile, "%d %d\n", width, height);
fprintf(outfile, "%d\n", 255);
- for ( y = height-1; y >= 0; y-- ){
- for ( x = 0; x < width; x++ ){
- r = red[y*width+x];
- g = green[y*width+x];
- b = blue[y*width+x];
- fwrite(&r, 1, 1, outfile);
- fwrite(&g, 1, 1, outfile);
- fwrite(&b, 1, 1, outfile);
- }
+ row_stride = width * 3;
+ i = height-1;
+ while (i >= 0) {
+ fwrite(&pixels[i * row_stride], 1, row_stride, outfile);
+ i--;
}
- Free(red);
- Free(green);
- Free(blue);
+ Free(pixels);
}
--
GitLab