X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=laserbrain_demo;a=blobdiff_plain;f=src%2Fopengl.c;h=80f712d1b36396581bf8679b29698b98aeaf9465;hp=796144c70ca18245dcf2f43351539b1ed659b4c9;hb=da8e3a1dd04a5ac29bcaa9582430c58a769ac571;hpb=794a378d5c8e07c815814324da8142be137406d0

diff --git a/src/opengl.c b/src/opengl.c
index 796144c..80f712d 100644
--- a/src/opengl.c
+++ b/src/opengl.c
@@ -1,3 +1,4 @@
+#include <stdlib.h>
 #include "opengl.h"
 #include "logger.h"
 
@@ -16,6 +17,7 @@ int init_opengl(void)
 	glewInit();
 
 	glcaps.debug = GLEW_ARB_debug_output;
+	glcaps.draw_range = GLEW_EXT_draw_range_elements;
 
 #ifndef NDEBUG
 	if(glcaps.debug) {
@@ -27,6 +29,33 @@ int init_opengl(void)
 	return 0;
 }
 
+void dump_gl_texture(unsigned int tex, const char *fname)
+{
+	FILE *fp;
+	int i, width, height;
+	unsigned char *pixels;
+
+	glBindTexture(GL_TEXTURE_2D, tex);
+	glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &width);
+	glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &height);
+
+	if(!(pixels = malloc(width * height * 3))) {
+		return;
+	}
+	glGetTexImage(GL_TEXTURE_2D, 0, GL_RGB, GL_UNSIGNED_BYTE, pixels);
+
+	if(!(fp = fopen(fname, "wb"))) {
+		free(pixels);
+		return;
+	}
+	fprintf(fp, "P6\n%d %d\n255\n", width, height);
+	for(i=0; i<width * height * 3; i++) {
+		fputc(pixels[i], fp);
+	}
+	fclose(fp);
+	free(pixels);
+}
+
 
 static void GLAPIENTRY gldebug_logger(GLenum src, GLenum type, GLuint id, GLenum severity,
 		GLsizei len, const char *msg, const void *cls)