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progs/demos: create a texture object in lodbias.c

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Before, we were using the default texture object (name=0).  This caused
the intel_generate_mipmap() path to fail since passing texture=0 to
glFramebufferTexture2DEXT() causes us to _unbind_ the texture if present.
This commit is contained in:
Brian Paul
2009-09-15 17:08:33 -06:00
parent a016043386
commit 7f86da6c60
1 changed files with 4 additions and 0 deletions
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progs/demos/lodbias.c
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@@ -43,6 +43,7 @@ static GLboolean Anim = GL_TRUE;
static GLint Bias = 0, BiasStepSign = +1; /* ints avoid fp precision problem */ static GLint Bias = 0, BiasStepSign = +1; /* ints avoid fp precision problem */
static GLint BiasMin = -400, BiasMax = 400; static GLint BiasMin = -400, BiasMax = 400;
static int win = 0; static int win = 0;
static GLuint TexObj = 0;
static void static void
@@ -214,6 +215,9 @@ static void Init( void )
glPixelStorei(GL_UNPACK_ALIGNMENT, 1); glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glGenTextures(1, &TexObj);
glBindTexture(GL_TEXTURE_2D, TexObj);
if (glutExtensionSupported("GL_SGIS_generate_mipmap")) { if (glutExtensionSupported("GL_SGIS_generate_mipmap")) {
/* test auto mipmap generation */ /* test auto mipmap generation */
GLint width, height, i; GLint width, height, i;