diff options
Diffstat (limited to 'tests/fbo.cc')
| -rw-r--r-- | tests/fbo.cc | 237 |
1 files changed, 0 insertions, 237 deletions
diff --git a/tests/fbo.cc b/tests/fbo.cc deleted file mode 100644 index a6677c1..0000000 --- a/tests/fbo.cc +++ /dev/null @@ -1,237 +0,0 @@ -#include "fbo.h" -#include "system-gl.h" -#include <stdio.h> -#include <iostream> -using namespace std; - -fbo_t *fbo_new() -{ - fbo_t *fbo = new fbo_t; - fbo->fbo_id = 0; - fbo->old_fbo_id = 0; - fbo->renderbuf_id = 0; - fbo->depthbuf_id = 0; - - return fbo; -} - -bool use_ext() -{ - // do we need to use the EXT or ARB version? - if (!glewIsSupported("GL_ARB_framebuffer_object") && - glewIsSupported("GL_EXT_framebuffer_object")) { - return true; - } else { - return false; - } -} - -bool check_fbo_status() -{ - /* This code is based on user V-man code from - http://www.opengl.org/wiki/GL_EXT_framebuffer_multisample - See also: http://www.songho.ca/opengl/gl_fbo.html */ - GLenum status; - bool result = false; - if (use_ext()) - status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT); - else - status = glCheckFramebufferStatus(GL_FRAMEBUFFER); - - if (report_glerror("checking framebuffer status")) return false; - - if (status == GL_FRAMEBUFFER_COMPLETE) - result = true; - else if (status == GL_FRAMEBUFFER_UNSUPPORTED) - cerr << "GL_FRAMEBUFFER_UNSUPPORTED\n"; - else if (status == GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT) - cerr << "GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT\n"; - else if (status == GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT) - cerr << "GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT\n"; - else if (status == GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT) - cerr << "GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT\n"; - else if (status == GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT) - cerr << "GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT\n"; - else if (status == GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT) - cerr << "GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT\n"; - else if (status == GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT) - cerr << "GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT\n"; - else if (status == GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE_EXT) - cerr << "GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE_EXT\n"; - else - cerr << "Unknown Code: glCheckFramebufferStatusEXT returned %i\n",status; - return result; -} - -bool fbo_ext_init(fbo_t *fbo, size_t width, size_t height) -{ - // Generate and bind FBO - glGenFramebuffersEXT(1, &fbo->fbo_id); - if (report_glerror("glGenFramebuffersEXT")) return false; - glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo->fbo_id); - if (report_glerror("glBindFramebufferEXT")) return false; - - // Generate depth and render buffers - glGenRenderbuffersEXT(1, &fbo->depthbuf_id); - glGenRenderbuffersEXT(1, &fbo->renderbuf_id); - - // Create buffers with correct size - if (!fbo_resize(fbo, width, height)) return false; - - // Attach render and depth buffers - glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, - GL_RENDERBUFFER_EXT, fbo->renderbuf_id); - if (report_glerror("specifying color render buffer EXT")) return false; - - - if (!check_fbo_status()) { - cerr << "Problem with OpenGL EXT framebuffer after specifying color render buffer.\n"; - return false; - } - - if (glewIsSupported("GL_EXT_packed_depth_stencil")) { - glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, - GL_RENDERBUFFER_EXT, fbo->depthbuf_id); - if (report_glerror("specifying depth render buffer EXT")) return false; - - glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_STENCIL_ATTACHMENT_EXT, - GL_RENDERBUFFER_EXT, fbo->depthbuf_id); - if (report_glerror("specifying stencil render buffer EXT")) return false; - - if (!check_fbo_status()) { - cerr << "Problem with OpenGL EXT framebuffer after specifying depth render buffer.\n"; - return false; - } - } - else { - cerr << "Warning: Cannot create stencil buffer (GL_EXT_packed_depth_stencil not supported)\n"; - glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, - GL_RENDERBUFFER_EXT, fbo->depthbuf_id); - if (report_glerror("specifying depth render buffer EXT")) return false; - - if (!check_fbo_status()) { - cerr << "Problem with OpenGL EXT framebuffer after specifying depth stencil render buffer.\n"; - return false; - } - } - - return true; -} - -bool fbo_arb_init(fbo_t *fbo, size_t width, size_t height) -{ - // Generate and bind FBO - glGenFramebuffers(1, &fbo->fbo_id); - if (report_glerror("glGenFramebuffers")) return false; - glBindFramebuffer(GL_FRAMEBUFFER, fbo->fbo_id); - if (report_glerror("glBindFramebuffer")) return false; - - // Generate depth and render buffers - glGenRenderbuffers(1, &fbo->depthbuf_id); - glGenRenderbuffers(1, &fbo->renderbuf_id); - - // Create buffers with correct size - if (!fbo_resize(fbo, width, height)) return false; - - // Attach render and depth buffers - glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, - GL_RENDERBUFFER, fbo->renderbuf_id); - if (report_glerror("specifying color render buffer")) return false; - - if (!check_fbo_status()) { - cerr << "Problem with OpenGL framebuffer after specifying color render buffer.\n"; - return false; - } - - //glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, - // to prevent Mesa's software renderer from crashing, do this in two stages. - // ie. instead of using GL_DEPTH_STENCIL_ATTACHMENT, do DEPTH then STENCIL. - glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, - GL_RENDERBUFFER, fbo->depthbuf_id); - glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, - GL_RENDERBUFFER, fbo->depthbuf_id); - if (report_glerror("specifying depth stencil render buffer")) return false; - - if (!check_fbo_status()) { - cerr << "Problem with OpenGL framebuffer after specifying depth render buffer.\n"; - return false; - } - - return true; -} - - -bool fbo_init(fbo_t *fbo, size_t width, size_t height) -{ - /* - Some OpenGL drivers include the framebuffer functions but not with - core or ARB names, only with the EXT name. This has been worked-around - by deciding at runtime, using GLEW, which version needs to be used. See also: - - http://www.opengl.org/wiki/Framebuffer_Object - http://stackoverflow.com/questions/6912988/glgenframebuffers-or-glgenframebuffersex - http://www.devmaster.net/forums/showthread.php?t=10967 - */ - - bool result = false; - if (glewIsSupported("GL_ARB_framebuffer_object")) - result = fbo_arb_init(fbo, width, height); - else if (use_ext()) - result = fbo_ext_init(fbo, width, height); - else - cerr << "Framebuffer Object extension not found by GLEW\n"; - return result; -} - -bool fbo_resize(fbo_t *fbo, size_t width, size_t height) -{ - if (use_ext()) { - glBindRenderbufferEXT(GL_RENDERBUFFER, fbo->depthbuf_id); - if (glewIsSupported("GL_EXT_packed_depth_stencil")) { - glRenderbufferStorageEXT(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, width, height); - if (report_glerror("creating EXT depth stencil render buffer")) return false; - } - else { - glRenderbufferStorageEXT(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, width, height); - if (report_glerror("creating EXT depth render buffer")) return false; - } - - glBindRenderbufferEXT(GL_RENDERBUFFER, fbo->renderbuf_id); - glRenderbufferStorageEXT(GL_RENDERBUFFER, GL_RGBA8, width, height); - if (report_glerror("creating EXT color render buffer")) return false; - } else { - glBindRenderbuffer(GL_RENDERBUFFER, fbo->renderbuf_id); - glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA8, width, height); - if (report_glerror("creating color render buffer")) return false; - - glBindRenderbuffer(GL_RENDERBUFFER, fbo->depthbuf_id); - glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, width, height); - if (report_glerror("creating depth stencil render buffer")) return false; - - } - - return true; -} - -void fbo_delete(fbo_t *fbo) -{ - delete fbo; -} - -GLuint fbo_bind(fbo_t *fbo) -{ - glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint *)&fbo->old_fbo_id); - if (use_ext()) - glBindFramebufferEXT(GL_FRAMEBUFFER, fbo->fbo_id); - else - glBindFramebuffer(GL_FRAMEBUFFER, fbo->fbo_id); - return fbo->old_fbo_id; -} - -void fbo_unbind(fbo_t *fbo) -{ - if (use_ext()) - glBindFramebufferEXT(GL_FRAMEBUFFER, fbo->old_fbo_id); - else - glBindFramebuffer(GL_FRAMEBUFFER, fbo->old_fbo_id); -} |