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-rw-r--r--progs/demos/cubemap.c17
1 files changed, 13 insertions, 4 deletions
diff --git a/progs/demos/cubemap.c b/progs/demos/cubemap.c
index 26db42aed5..1f9f290575 100644
--- a/progs/demos/cubemap.c
+++ b/progs/demos/cubemap.c
@@ -52,6 +52,7 @@ static GLboolean NoClear = GL_FALSE;
static GLint FrameParity = 0;
static GLenum FilterIndex = 0;
static GLint ClampIndex = 0;
+static GLboolean supportFBO = GL_FALSE;
static struct {
@@ -403,6 +404,10 @@ static void init_checkers( void )
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+ if (!supportFBO)
+ glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_GENERATE_MIPMAP_SGIS, GL_TRUE);
+
+
/* make colored checkerboard cube faces */
for (f = 0; f < 6; f++) {
for (i = 0; i < CUBE_TEX_SIZE; i++) {
@@ -426,7 +431,8 @@ static void init_checkers( void )
GL_BGRA, GL_UNSIGNED_BYTE, image);
}
- glGenerateMipmapEXT(GL_TEXTURE_CUBE_MAP_ARB);
+ if (supportFBO)
+ glGenerateMipmapEXT(GL_TEXTURE_CUBE_MAP_ARB);
}
@@ -503,10 +509,13 @@ static void init( GLboolean useImageFiles )
exit(0);
}
- /* Needed for glGenerateMipmapEXT
+ /* Needed for glGenerateMipmapEXT / auto mipmapping
*/
- if (!strstr(exten, "GL_EXT_framebuffer_object")) {
- printf("Sorry, this demo requires GL_EXT_framebuffer_object\n");
+ if (strstr(exten, "GL_EXT_framebuffer_object")) {
+ supportFBO = GL_TRUE;
+ }
+ else if (!strstr(exten, "GL_SGIS_generate_mipmap")) {
+ printf("Sorry, this demo requires GL_EXT_framebuffer_object or GL_SGIS_generate_mipmap\n");
exit(0);
}
}