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-rw-r--r--src/glut/glx/Makefile1
-rw-r--r--src/glut/glx/glut_init.c4
-rw-r--r--src/glut/glx/glut_ppm.c80
-rw-r--r--src/glut/glx/glut_swap.c4
-rw-r--r--src/glut/glx/glutint.h5
5 files changed, 94 insertions, 0 deletions
diff --git a/src/glut/glx/Makefile b/src/glut/glx/Makefile
index c8f0097ebe..87301f1b77 100644
--- a/src/glut/glx/Makefile
+++ b/src/glut/glx/Makefile
@@ -56,6 +56,7 @@ SOURCES = \
glut_modifier.c \
glut_mroman.c \
glut_overlay.c \
+ glut_ppm.c \
glut_roman.c \
glut_shapes.c \
glut_space.c \
diff --git a/src/glut/glx/glut_init.c b/src/glut/glx/glut_init.c
index b1a42a328d..78843e93bc 100644
--- a/src/glut/glx/glut_init.c
+++ b/src/glut/glx/glut_init.c
@@ -51,6 +51,7 @@ int __glutInitX = -1, __glutInitY = -1;
GLboolean __glutForceDirect = GL_FALSE,
__glutTryDirect = GL_TRUE;
Atom __glutWMDeleteWindow;
+char *__glutPPMFile = NULL;
/* *INDENT-ON* */
#ifdef _WIN32
@@ -341,6 +342,9 @@ glutInit(int *argcp, char **argv)
__glutFPS = 5000; /* 5000 milliseconds */
}
}
+
+ /* check if GLUT_PPM_FILE env var is set */
+ __glutPPMFile = getenv("GLUT_PPM_FILE");
}
#ifdef _WIN32
diff --git a/src/glut/glx/glut_ppm.c b/src/glut/glx/glut_ppm.c
new file mode 100644
index 0000000000..49dca8532f
--- /dev/null
+++ b/src/glut/glx/glut_ppm.c
@@ -0,0 +1,80 @@
+/*
+ * PPM file output
+ * Brian Paul
+ * 8 Dec 2008
+ */
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "glutint.h"
+
+
+static void
+write_ppm_file(const char *filename, const GLubyte *buffer,
+ int width, int height)
+{
+ const int binary = 1;
+ FILE *f = fopen( filename, "w" );
+ if (f) {
+ const GLubyte *ptr = buffer;
+ int i, x, y;
+ if (binary) {
+ fprintf(f,"P6\n");
+ fprintf(f,"# ppm-file created by GLUT\n");
+ fprintf(f,"%i %i\n", width, height);
+ fprintf(f,"255\n");
+ fclose(f);
+ f = fopen( filename, "ab" ); /* reopen in binary append mode */
+ for (y = height - 1; y >= 0; y--) {
+ for (x = 0; x < width; x++) {
+ i = (y * width + x) * 4;
+ fputc(ptr[i], f); /* write red */
+ fputc(ptr[i+1], f); /* write green */
+ fputc(ptr[i+2], f); /* write blue */
+ }
+ }
+ }
+ else {
+ /*ASCII*/
+ int counter = 0;
+ fprintf(f,"P3\n");
+ fprintf(f,"# ascii ppm file created by GLUT\n");
+ fprintf(f,"%i %i\n", width, height);
+ fprintf(f,"255\n");
+ for (y = height - 1; y >= 0; y--) {
+ for (x = 0; x < width; x++) {
+ i = (y * width + x) * 4;
+ fprintf(f, " %3d %3d %3d", ptr[i], ptr[i+1], ptr[i+2]);
+ counter++;
+ if (counter % 5 == 0)
+ fprintf(f, "\n");
+ }
+ }
+ }
+ fclose(f);
+ }
+}
+
+
+/**
+ * Called from SwapBuffers if the GLUT_PPM_FILE env var is set.
+ */
+void __glutWritePPMFile(void)
+{
+ int w = glutGet(GLUT_WINDOW_WIDTH);
+ int h = glutGet(GLUT_WINDOW_HEIGHT);
+ GLubyte *buf;
+
+ assert(__glutPPMFile);
+
+ buf = (GLubyte *) malloc(w * h * 4);
+ if (buf) {
+ /* XXX save/restore pixel packing */
+ glReadPixels(0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, buf);
+ write_ppm_file(__glutPPMFile, buf, w, h);
+ free(buf);
+ }
+
+ __glutPPMFile = NULL; /* only write one file */
+}
diff --git a/src/glut/glx/glut_swap.c b/src/glut/glx/glut_swap.c
index 4831b8eb35..07a2da88a2 100644
--- a/src/glut/glx/glut_swap.c
+++ b/src/glut/glx/glut_swap.c
@@ -18,6 +18,10 @@ glutSwapBuffers(void)
{
GLUTwindow *window = __glutCurrentWindow;
+ if (__glutPPMFile) {
+ __glutWritePPMFile();
+ }
+
if (window->renderWin == window->win) {
if (__glutCurrentWindow->treatAsSingle) {
/* Pretend the double buffered window is single buffered,
diff --git a/src/glut/glx/glutint.h b/src/glut/glx/glutint.h
index a962c78023..f32da28239 100644
--- a/src/glut/glx/glutint.h
+++ b/src/glut/glx/glutint.h
@@ -664,6 +664,7 @@ extern unsigned int __glutModifierMask;
#ifdef _WIN32
extern void (__cdecl *__glutExitFunc)(int retval);
#endif
+extern char *__glutPPMFile;
/* private variables from glut_menu.c */
extern GLUTmenuItem *__glutItemSelected;
@@ -684,6 +685,9 @@ extern void __glutFreeOverlay(GLUToverlay * overlay);
extern XVisualInfo *__glutDetermineWindowVisual(Bool * treatAsSingle,
Bool * visAlloced, void **fbc);
+/* private variables from glut_ppm.c */
+extern void __glutWritePPMFile(void);
+
/* private variables from glut_mesa.c */
extern int __glutMesaSwapHackSupport;
@@ -812,4 +816,5 @@ extern LONG WINAPI __glutWindowProc(HWND win, UINT msg, WPARAM w, LPARAM l);
extern HDC XHDC;
#endif
+
#endif /* __glutint_h__ */