Mesa (master): progs/demos: try different depth formats in fbo_firecube.c
Brian Paul
brianp at kemper.freedesktop.org
Thu Oct 15 01:13:42 UTC 2009
Module: Mesa
Branch: master
Commit: 91bd87c06ee5427887e1284bd52424387e54397f
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=91bd87c06ee5427887e1284bd52424387e54397f
Author: Brian Paul <brianp at vmware.com>
Date: Wed Oct 14 19:13:32 2009 -0600
progs/demos: try different depth formats in fbo_firecube.c
---
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 4e42924..b3f7e00 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);
/*
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