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demos: make cubemap work without EXT_fbo support 

use SGIS_generate_mipmap if EXT_fbo support (for manual mipmap generation)
is not available.
This commit is contained in:
Roland Scheidegger 2009-06-20 00:24:03 +02:00
parent dd26899ca3
commit 7a5c5b9af3
1 changed files with 13 additions and 4 deletions
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17
progs/demos/cubemap.c
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@ -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);
}
}