diff options
| -rw-r--r-- | progs/demos/fbo_firecube.c | 36 |
1 files changed, 28 insertions, 8 deletions
diff --git a/progs/demos/fbo_firecube.c b/progs/demos/fbo_firecube.c index 4e42924a09e..b3f7e00e5af 100644 --- a/progs/demos/fbo_firecube.c +++ b/progs/demos/fbo_firecube.c @@ -938,7 +938,14 @@ reshape(int width, int height) static void init_fbotexture() { + static const GLenum depthFormats[] = { + GL_DEPTH_COMPONENT, + GL_DEPTH_COMPONENT16, + GL_DEPTH_COMPONENT32 + }; + static int numDepthFormats = sizeof(depthFormats) / sizeof(depthFormats[0]); GLint i; + GLenum stat; /* gen framebuffer id, delete it, do some assertions, just for testing */ glGenFramebuffersEXT(1, &MyFB); @@ -969,18 +976,31 @@ init_fbotexture() /* make depth renderbuffer */ glGenRenderbuffersEXT(1, &DepthRB); glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, DepthRB); - glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT16, - TexWidth, TexHeight); - CheckError(__LINE__); + /* we may have to try several formats */ + for (i = 0; i < numDepthFormats; i++) { + glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, depthFormats[i], + TexWidth, TexHeight); + CheckError(__LINE__); + + glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, + GL_RENDERBUFFER_EXT, DepthRB); + CheckError(__LINE__); + stat = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT); + if (stat == GL_FRAMEBUFFER_COMPLETE_EXT) { + break; + } + } + + if (stat != GL_FRAMEBUFFER_COMPLETE_EXT) { + fprintf(stderr, "Error: unable to get usable FBO combination!\n"); + exit(1); + } + glGetRenderbufferParameterivEXT(GL_RENDERBUFFER_EXT, - GL_RENDERBUFFER_DEPTH_SIZE_EXT, &i); + GL_RENDERBUFFER_DEPTH_SIZE_EXT, &i); CheckError(__LINE__); printf("Depth renderbuffer size = %d bits\n", i); - /* attach DepthRB to MyFB */ - glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, - GL_RENDERBUFFER_EXT, DepthRB); - CheckError(__LINE__); glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0); /* |