added detection of GL_EXT_framebuffer_object extension

[xonotic/darkplaces.git] / gl_backend.c

diff --git a/gl_backend.c b/gl_backend.c
index c0907b3663fa36749d8a9b25d9122106221d5d40..9647420f81f409b07da9f198228fb3dca79ca86a 100644 (file)
--- a/gl_backend.c
+++ b/gl_backend.c
@@ -16,6 +16,7 @@ cvar_t gl_dither = {CVAR_SAVE, "gl_dither", "1", "enables OpenGL dithering (16bi
 cvar_t gl_lockarrays = {0, "gl_lockarrays", "0", "enables use of glLockArraysEXT, may cause glitches with some broken drivers, and may be slower than normal"};
 cvar_t gl_lockarrays_minimumvertices = {0, "gl_lockarrays_minimumvertices", "1", "minimum number of vertices required for use of glLockArraysEXT, setting this too low may reduce performance"};
 cvar_t gl_vbo = {CVAR_SAVE, "gl_vbo", "3", "make use of GL_ARB_vertex_buffer_object extension to store static geometry in video memory for faster rendering, 0 disables VBO allocation or use, 1 enables VBOs for vertex and triangle data, 2 only for vertex data, 3 for vertex data and triangle data of simple meshes (ones with only one surface)"};
+cvar_t gl_fbo = {CVAR_SAVE, "gl_fbo", "1", "make use of GL_ARB_framebuffer_object extension to enable shadowmaps and other features using pixel formats different from the framebuffer"};
 
 cvar_t v_flipped = {0, "v_flipped", "0", "mirror the screen (poor man's left handed mode)"};
 qboolean v_flipped_state = false;
@@ -696,6 +697,12 @@ void GL_Backend_ResetState(void)
                qglBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
        }
 
+       if (gl_support_ext_framebuffer_object)
+       {
+               qglBindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
+               qglBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+       }
+
        qglVertexPointer(3, GL_FLOAT, sizeof(float[3]), NULL);CHECKGLERROR
        qglEnableClientState(GL_VERTEX_ARRAY);CHECKGLERROR