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-rw-r--r--progs/demos/Makefile7
-rw-r--r--progs/demos/fbotexture.c108
-rw-r--r--progs/util/extfuncs.h81
3 files changed, 158 insertions, 38 deletions
diff --git a/progs/demos/Makefile b/progs/demos/Makefile
index c17595ec794..65fdbaaad8e 100644
--- a/progs/demos/Makefile
+++ b/progs/demos/Makefile
@@ -145,6 +145,13 @@ engine.o: engine.c trackball.h
$(APP_CC) -c -I$(INCDIR) $(CFLAGS) engine.c
+fbotexture: fbotexture.o
+ $(APP_CC) $(CFLAGS) $(LDFLAGS) fbotexture.o $(LIBS) -o $@
+
+fbotexture.o: fbotexture.c extfuncs.h
+ $(APP_CC) -c -I$(INCDIR) $(CFLAGS) fbotexture.c
+
+
fslight: fslight.o
$(APP_CC) $(CFLAGS) $(LDFLAGS) fslight.o $(LIBS) -o $@
diff --git a/progs/demos/fbotexture.c b/progs/demos/fbotexture.c
index 50a4b00afce..3b36f755a04 100644
--- a/progs/demos/fbotexture.c
+++ b/progs/demos/fbotexture.c
@@ -9,13 +9,13 @@
*/
-#include <GL/glew.h>
#include <GL/glut.h>
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
+#include "extfuncs.h"
/* For debug */
#define DEPTH 1
@@ -80,9 +80,9 @@ RenderTexture(void)
glTranslatef(0.0, 0.0, -15.0);
/* draw to texture image */
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, MyFB);
+ glBindFramebuffer_func(GL_FRAMEBUFFER_EXT, MyFB);
- status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
+ status = glCheckFramebufferStatus_func(GL_FRAMEBUFFER_EXT);
if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
printf("Framebuffer incomplete!!!\n");
}
@@ -171,7 +171,7 @@ RenderTexture(void)
#if DRAW
/* Bind normal framebuffer */
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+ glBindFramebuffer_func(GL_FRAMEBUFFER_EXT, 0);
#endif
CheckError(__LINE__);
@@ -252,12 +252,12 @@ static void
CleanUp(void)
{
#if DEPTH
- glDeleteRenderbuffersEXT(1, &DepthRB);
+ glDeleteRenderbuffers_func(1, &DepthRB);
#endif
#if STENCIL
- glDeleteRenderbuffersEXT(1, &StencilRB);
+ glDeleteRenderbuffers_func(1, &StencilRB);
#endif
- glDeleteFramebuffersEXT(1, &MyFB);
+ glDeleteFramebuffers_func(1, &MyFB);
glDeleteTextures(1, &TexObj);
@@ -318,14 +318,14 @@ AttachDepthAndStencilBuffers(GLuint fbo,
*depthRbOut = *stencilRbOut = 0;
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo);
+ glBindFramebuffer_func(GL_FRAMEBUFFER_EXT, fbo);
if (tryDepthStencil) {
GLuint rb;
- glGenRenderbuffersEXT(1, &rb);
- glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, rb);
- glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT,
+ glGenRenderbuffers_func(1, &rb);
+ glBindRenderbuffer_func(GL_RENDERBUFFER_EXT, rb);
+ glRenderbufferStorage_func(GL_RENDERBUFFER_EXT,
GL_DEPTH24_STENCIL8_EXT,
width, height);
if (glGetError())
@@ -333,7 +333,7 @@ AttachDepthAndStencilBuffers(GLuint fbo,
if (bindDepthStencil) {
/* attach to both depth and stencil at once */
- glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
+ glFramebufferRenderbuffer_func(GL_FRAMEBUFFER_EXT,
GL_DEPTH_STENCIL_ATTACHMENT,
GL_RENDERBUFFER_EXT, rb);
if (glGetError())
@@ -341,21 +341,21 @@ AttachDepthAndStencilBuffers(GLuint fbo,
}
else {
/* attach to depth attachment point */
- glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
+ glFramebufferRenderbuffer_func(GL_FRAMEBUFFER_EXT,
GL_DEPTH_ATTACHMENT_EXT,
GL_RENDERBUFFER_EXT, rb);
if (glGetError())
return GL_FALSE;
/* and attach to stencil attachment point */
- glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
+ glFramebufferRenderbuffer_func(GL_FRAMEBUFFER_EXT,
GL_STENCIL_ATTACHMENT_EXT,
GL_RENDERBUFFER_EXT, rb);
if (glGetError())
return GL_FALSE;
}
- status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
+ status = glCheckFramebufferStatus_func(GL_FRAMEBUFFER_EXT);
if (status != GL_FRAMEBUFFER_COMPLETE_EXT)
return GL_FALSE;
@@ -367,22 +367,22 @@ AttachDepthAndStencilBuffers(GLuint fbo,
{
GLuint rb;
- glGenRenderbuffersEXT(1, &rb);
- glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, rb);
- glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT,
+ glGenRenderbuffers_func(1, &rb);
+ glBindRenderbuffer_func(GL_RENDERBUFFER_EXT, rb);
+ glRenderbufferStorage_func(GL_RENDERBUFFER_EXT,
GL_DEPTH_COMPONENT,
width, height);
if (glGetError())
return GL_FALSE;
/* attach to depth attachment point */
- glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
+ glFramebufferRenderbuffer_func(GL_FRAMEBUFFER_EXT,
GL_DEPTH_ATTACHMENT_EXT,
GL_RENDERBUFFER_EXT, rb);
if (glGetError())
return GL_FALSE;
- status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
+ status = glCheckFramebufferStatus_func(GL_FRAMEBUFFER_EXT);
if (status != GL_FRAMEBUFFER_COMPLETE_EXT)
return GL_FALSE;
@@ -393,26 +393,26 @@ AttachDepthAndStencilBuffers(GLuint fbo,
{
GLuint rb;
- glGenRenderbuffersEXT(1, &rb);
- glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, rb);
- glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT,
+ glGenRenderbuffers_func(1, &rb);
+ glBindRenderbuffer_func(GL_RENDERBUFFER_EXT, rb);
+ glRenderbufferStorage_func(GL_RENDERBUFFER_EXT,
GL_STENCIL_INDEX,
width, height);
if (glGetError())
return GL_FALSE;
/* attach to depth attachment point */
- glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
+ glFramebufferRenderbuffer_func(GL_FRAMEBUFFER_EXT,
GL_STENCIL_ATTACHMENT_EXT,
GL_RENDERBUFFER_EXT, rb);
if (glGetError())
return GL_FALSE;
- status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
+ status = glCheckFramebufferStatus_func(GL_FRAMEBUFFER_EXT);
if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
- glDeleteRenderbuffersEXT(1, depthRbOut);
+ glDeleteRenderbuffers_func(1, depthRbOut);
*depthRbOut = 0;
- glDeleteRenderbuffersEXT(1, &rb);
+ glDeleteRenderbuffers_func(1, &rb);
return GL_FALSE;
}
@@ -463,6 +463,37 @@ ParseArgs(int argc, char *argv[])
}
+static void
+SetupFunctionPointers(void)
+{
+ GetExtensionFuncs();
+
+ if (Use_ARB_fbo) {
+ /* no-op: use the ARB functions as-is */
+ }
+ else {
+ /* set the ARB-flavor function pointers to point to the EXT functions */
+ glIsRenderbuffer_func = glIsRenderbufferEXT_func;
+ glBindRenderbuffer_func = glBindRenderbufferEXT_func;
+ glDeleteRenderbuffers_func = glDeleteRenderbuffersEXT_func;
+ glGenRenderbuffers_func = glGenRenderbuffersEXT_func;
+ glRenderbufferStorage_func = glRenderbufferStorageEXT_func;
+ glGetRenderbufferParameteriv_func = glGetRenderbufferParameterivEXT_func;
+ glIsFramebuffer_func = glIsFramebufferEXT_func;
+ glBindFramebuffer_func = glBindFramebufferEXT_func;
+ glDeleteFramebuffers_func = glDeleteFramebuffersEXT_func;
+ glGenFramebuffers_func = glGenFramebuffersEXT_func;
+ glCheckFramebufferStatus_func = glCheckFramebufferStatusEXT_func;
+ glFramebufferTexture1D_func = glFramebufferTexture1DEXT_func;
+ glFramebufferTexture2D_func = glFramebufferTexture2DEXT_func;
+ glFramebufferTexture3D_func = glFramebufferTexture3DEXT_func;
+ glFramebufferRenderbuffer_func = glFramebufferRenderbufferEXT_func;
+ glGetFramebufferAttachmentParameteriv_func = glGetFramebufferAttachmentParameterivEXT_func;
+ glGenerateMipmap_func = glGenerateMipmapEXT_func;
+ }
+}
+
+
/*
* Make FBO to render into given texture.
*/
@@ -472,10 +503,10 @@ MakeFBO_RenderTexture(GLuint TexObj)
GLuint fb;
GLint sizeFudge = 0;
- glGenFramebuffersEXT(1, &fb);
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
+ glGenFramebuffers_func(1, &fb);
+ glBindFramebuffer_func(GL_FRAMEBUFFER_EXT, fb);
/* Render color to texture */
- glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
+ glFramebufferTexture2D_func(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
TexTarget, TexObj, TextureLevel);
if (Use_ARB_fbo) {
@@ -512,26 +543,26 @@ MakeFBO_RenderTexture(GLuint TexObj)
{
GLint bits, w, h;
- glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, DepthRB);
- glGetRenderbufferParameterivEXT(GL_RENDERBUFFER_EXT,
+ glBindRenderbuffer_func(GL_RENDERBUFFER_EXT, DepthRB);
+ glGetRenderbufferParameteriv_func(GL_RENDERBUFFER_EXT,
GL_RENDERBUFFER_WIDTH_EXT, &w);
- glGetRenderbufferParameterivEXT(GL_RENDERBUFFER_EXT,
+ glGetRenderbufferParameteriv_func(GL_RENDERBUFFER_EXT,
GL_RENDERBUFFER_HEIGHT_EXT, &h);
printf("Color/Texture size: %d x %d\n", TexWidth, TexHeight);
printf("Depth buffer size: %d x %d\n", w, h);
- glGetRenderbufferParameterivEXT(GL_RENDERBUFFER_EXT,
+ glGetRenderbufferParameteriv_func(GL_RENDERBUFFER_EXT,
GL_RENDERBUFFER_DEPTH_SIZE_EXT, &bits);
printf("Depth renderbuffer size = %d bits\n", bits);
- glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, StencilRB);
- glGetRenderbufferParameterivEXT(GL_RENDERBUFFER_EXT,
+ glBindRenderbuffer_func(GL_RENDERBUFFER_EXT, StencilRB);
+ glGetRenderbufferParameteriv_func(GL_RENDERBUFFER_EXT,
GL_RENDERBUFFER_STENCIL_SIZE_EXT, &bits);
printf("Stencil renderbuffer size = %d bits\n", bits);
}
/* bind the regular framebuffer */
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+ glBindFramebuffer_func(GL_FRAMEBUFFER_EXT, 0);
return fb;
}
@@ -547,6 +578,8 @@ Init(void)
printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
+ SetupFunctionPointers();
+
/* lighting */
{
static const GLfloat mat[4] = { 1.0, 0.5, 0.5, 1.0 };
@@ -605,7 +638,6 @@ main(int argc, char *argv[])
glutInitWindowSize(Width, Height);
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
Win = glutCreateWindow(argv[0]);
- glewInit();
glutReshapeFunc(Reshape);
glutKeyboardFunc(Key);
glutDisplayFunc(Display);
diff --git a/progs/util/extfuncs.h b/progs/util/extfuncs.h
index 238794d55a9..2bb57030a89 100644
--- a/progs/util/extfuncs.h
+++ b/progs/util/extfuncs.h
@@ -95,6 +95,47 @@ static PFNGLBUFFERSUBDATAARBPROC glBufferSubDataARB_func = NULL;
static PFNGLMAPBUFFERARBPROC glMapBufferARB_func = NULL;
static PFNGLUNMAPBUFFERARBPROC glUnmapBufferARB_func = NULL;
+/* GL_EXT_framebuffer_object */
+static PFNGLISRENDERBUFFEREXTPROC glIsRenderbufferEXT_func = NULL;
+static PFNGLBINDRENDERBUFFEREXTPROC glBindRenderbufferEXT_func = NULL;
+static PFNGLDELETERENDERBUFFERSEXTPROC glDeleteRenderbuffersEXT_func = NULL;
+static PFNGLGENRENDERBUFFERSEXTPROC glGenRenderbuffersEXT_func = NULL;
+static PFNGLRENDERBUFFERSTORAGEEXTPROC glRenderbufferStorageEXT_func = NULL;
+static PFNGLGETRENDERBUFFERPARAMETERIVEXTPROC glGetRenderbufferParameterivEXT_func = NULL;
+static PFNGLISFRAMEBUFFEREXTPROC glIsFramebufferEXT_func = NULL;
+static PFNGLBINDFRAMEBUFFEREXTPROC glBindFramebufferEXT_func = NULL;
+static PFNGLDELETEFRAMEBUFFERSEXTPROC glDeleteFramebuffersEXT_func = NULL;
+static PFNGLGENFRAMEBUFFERSEXTPROC glGenFramebuffersEXT_func = NULL;
+static PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC glCheckFramebufferStatusEXT_func = NULL;
+static PFNGLFRAMEBUFFERTEXTURE1DEXTPROC glFramebufferTexture1DEXT_func = NULL;
+static PFNGLFRAMEBUFFERTEXTURE2DEXTPROC glFramebufferTexture2DEXT_func = NULL;
+static PFNGLFRAMEBUFFERTEXTURE3DEXTPROC glFramebufferTexture3DEXT_func = NULL;
+static PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC glFramebufferRenderbufferEXT_func = NULL;
+static PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVEXTPROC glGetFramebufferAttachmentParameterivEXT_func = NULL;
+static PFNGLGENERATEMIPMAPEXTPROC glGenerateMipmapEXT_func = NULL;
+
+/* GL_ARB_framebuffer_object */
+static PFNGLISRENDERBUFFERPROC glIsRenderbuffer_func = NULL;
+static PFNGLBINDRENDERBUFFERPROC glBindRenderbuffer_func = NULL;
+static PFNGLDELETERENDERBUFFERSPROC glDeleteRenderbuffers_func = NULL;
+static PFNGLGENRENDERBUFFERSPROC glGenRenderbuffers_func = NULL;
+static PFNGLRENDERBUFFERSTORAGEPROC glRenderbufferStorage_func = NULL;
+static PFNGLGETRENDERBUFFERPARAMETERIVPROC glGetRenderbufferParameteriv_func = NULL;
+static PFNGLISFRAMEBUFFERPROC glIsFramebuffer_func = NULL;
+static PFNGLBINDFRAMEBUFFERPROC glBindFramebuffer_func = NULL;
+static PFNGLDELETEFRAMEBUFFERSPROC glDeleteFramebuffers_func = NULL;
+static PFNGLGENFRAMEBUFFERSPROC glGenFramebuffers_func = NULL;
+static PFNGLCHECKFRAMEBUFFERSTATUSPROC glCheckFramebufferStatus_func = NULL;
+static PFNGLFRAMEBUFFERTEXTURE1DPROC glFramebufferTexture1D_func = NULL;
+static PFNGLFRAMEBUFFERTEXTURE2DPROC glFramebufferTexture2D_func = NULL;
+static PFNGLFRAMEBUFFERTEXTURE3DPROC glFramebufferTexture3D_func = NULL;
+static PFNGLFRAMEBUFFERRENDERBUFFERPROC glFramebufferRenderbuffer_func = NULL;
+static PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVPROC glGetFramebufferAttachmentParameteriv_func = NULL;
+static PFNGLGENERATEMIPMAPPROC glGenerateMipmap_func = NULL;
+static PFNGLBLITFRAMEBUFFERPROC glBlitFramebuffer_func = NULL;
+static PFNGLRENDERBUFFERSTORAGEMULTISAMPLEPROC glRenderbufferStorageMultisample_func = NULL;
+static PFNGLFRAMEBUFFERTEXTURELAYERPROC glFramebufferTextureLayer_func = NULL;
+
static void
GetExtensionFuncs(void)
@@ -192,5 +233,45 @@ GetExtensionFuncs(void)
glMapBufferARB_func = (PFNGLMAPBUFFERARBPROC) glutGetProcAddress("glMapBufferARB");
glUnmapBufferARB_func = (PFNGLUNMAPBUFFERARBPROC) glutGetProcAddress("glUnmapBufferARB");
+ /* GL_EXT_framebuffer_object */
+ glIsRenderbufferEXT_func = (PFNGLISRENDERBUFFEREXTPROC) glutGetProcAddress("glIsRenderbufferEXT");
+ glBindRenderbufferEXT_func = (PFNGLBINDRENDERBUFFEREXTPROC) glutGetProcAddress("glBindRenderbufferEXT");
+ glDeleteRenderbuffersEXT_func = (PFNGLDELETERENDERBUFFERSEXTPROC) glutGetProcAddress("glDeleteRenderbuffersEXT");
+ glGenRenderbuffersEXT_func = (PFNGLGENRENDERBUFFERSEXTPROC) glutGetProcAddress("glGenRenderbuffersEXT");
+ glRenderbufferStorageEXT_func = (PFNGLRENDERBUFFERSTORAGEEXTPROC) glutGetProcAddress("glRenderbufferStorageEXT");
+ glGetRenderbufferParameterivEXT_func = (PFNGLGETRENDERBUFFERPARAMETERIVEXTPROC) glutGetProcAddress("glGetRenderbufferParameterivEXT");
+ glIsFramebufferEXT_func = (PFNGLISFRAMEBUFFEREXTPROC) glutGetProcAddress("glIsFramebufferEXT");
+ glBindFramebufferEXT_func = (PFNGLBINDFRAMEBUFFEREXTPROC) glutGetProcAddress("glBindFramebufferEXT");
+ glDeleteFramebuffersEXT_func = (PFNGLDELETEFRAMEBUFFERSEXTPROC) glutGetProcAddress("glDeleteFramebuffersEXT");
+ glGenFramebuffersEXT_func = (PFNGLGENFRAMEBUFFERSEXTPROC) glutGetProcAddress("glGenFramebuffersEXT");
+ glCheckFramebufferStatusEXT_func = (PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC) glutGetProcAddress("glCheckFramebufferStatusEXT");
+ glFramebufferTexture1DEXT_func = (PFNGLFRAMEBUFFERTEXTURE1DEXTPROC) glutGetProcAddress("glFramebufferTexture1DEXT");
+ glFramebufferTexture2DEXT_func = (PFNGLFRAMEBUFFERTEXTURE2DEXTPROC) glutGetProcAddress("glFramebufferTexture2DEXT");
+ glFramebufferTexture3DEXT_func = (PFNGLFRAMEBUFFERTEXTURE3DEXTPROC) glutGetProcAddress("glFramebufferTexture3DEXT");
+ glFramebufferRenderbufferEXT_func = (PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC) glutGetProcAddress("glFramebufferRenderbufferEXT");
+ glGetFramebufferAttachmentParameterivEXT_func = (PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVEXTPROC) glutGetProcAddress("glGetFramebufferAttachmentParameterivEXT");
+ glGenerateMipmapEXT_func = (PFNGLGENERATEMIPMAPEXTPROC) glutGetProcAddress("glGenerateMipmapEXT");
+
+ /* GL_ARB_framebuffer_object */
+ glIsRenderbuffer_func = (PFNGLISRENDERBUFFERPROC) glutGetProcAddress("glIsRenderbuffer");
+ glBindRenderbuffer_func = (PFNGLBINDRENDERBUFFERPROC) glutGetProcAddress("glBindRenderbuffer");
+ glDeleteRenderbuffers_func = (PFNGLDELETERENDERBUFFERSPROC) glutGetProcAddress("glDeleteRenderbuffers");
+ glGenRenderbuffers_func = (PFNGLGENRENDERBUFFERSPROC) glutGetProcAddress("glGenRenderbuffers");
+ glRenderbufferStorage_func = (PFNGLRENDERBUFFERSTORAGEPROC) glutGetProcAddress("glRenderbufferStorage");
+ glGetRenderbufferParameteriv_func = (PFNGLGETRENDERBUFFERPARAMETERIVPROC) glutGetProcAddress("glGetRenderbufferParameteriv");
+ glIsFramebuffer_func = (PFNGLISFRAMEBUFFERPROC) glutGetProcAddress("glIsFramebuffer");
+ glBindFramebuffer_func = (PFNGLBINDFRAMEBUFFERPROC) glutGetProcAddress("glBindFramebuffer");
+ glDeleteFramebuffers_func = (PFNGLDELETEFRAMEBUFFERSPROC) glutGetProcAddress("glDeleteFramebuffers");
+ glGenFramebuffers_func = (PFNGLGENFRAMEBUFFERSPROC) glutGetProcAddress("glGenFramebuffers");
+ glCheckFramebufferStatus_func = (PFNGLCHECKFRAMEBUFFERSTATUSPROC) glutGetProcAddress("glCheckFramebufferStatus");
+ glFramebufferTexture1D_func = (PFNGLFRAMEBUFFERTEXTURE1DPROC) glutGetProcAddress("glFramebufferTexture1D");
+ glFramebufferTexture2D_func = (PFNGLFRAMEBUFFERTEXTURE2DPROC) glutGetProcAddress("glFramebufferTexture2D");
+ glFramebufferTexture3D_func = (PFNGLFRAMEBUFFERTEXTURE3DPROC) glutGetProcAddress("glFramebufferTexture3D");
+ glFramebufferRenderbuffer_func = (PFNGLFRAMEBUFFERRENDERBUFFERPROC) glutGetProcAddress("glFramebufferRenderbuffer");
+ glGetFramebufferAttachmentParameteriv_func = (PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVPROC) glutGetProcAddress("glGetFramebufferAttachmentParameteriv");
+ glGenerateMipmap_func = (PFNGLGENERATEMIPMAPPROC) glutGetProcAddress("glGenerateMipmap");
+ glBlitFramebuffer_func = (PFNGLBLITFRAMEBUFFERPROC) glutGetProcAddress("glBlitFramebuffer");
+ glRenderbufferStorageMultisample_func = (PFNGLRENDERBUFFERSTORAGEMULTISAMPLEPROC) glutGetProcAddress("glRenderbufferStorageMultisample");
+ glFramebufferTextureLayer_func = (PFNGLFRAMEBUFFERTEXTURELAYERPROC) glutGetProcAddress("glFramebufferTextureLayer");
}
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