Mesa (master): demos: update fbotexture. c to use EXT or ARB functions exclusively
Thomas Hellstrom
thomash at kemper.freedesktop.org
Mon Jun 15 09:45:24 UTC 2009
Module: Mesa
Branch: master
Commit: fb64365642be82ac0dc0d43452afc4650d309b53
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=fb64365642be82ac0dc0d43452afc4650d309b53
Author: Brian Paul <brianp at vmware.com>
Date: Thu Jun 11 15:50:47 2009 -0600
demos: update fbotexture.c to use EXT or ARB functions exclusively
When the -arb option is specified we use GL_ARB_framebuffer_object intead
of GL_EXT_framebuffer_object.
For some vendors' OpenGL it's important to call the ARB entrypoints
instead of the EXT entrypoints to get correct behaviour. Use some
function pointer tricks to do this (instead of GLEW).
---
progs/demos/Makefile | 7 +++
progs/demos/fbotexture.c | 108 ++++++++++++++++++++++++++++++----------------
2 files changed, 77 insertions(+), 38 deletions(-)
diff --git a/progs/demos/Makefile b/progs/demos/Makefile
index c17595e..65fdbaa 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 50a4b00..3b36f75 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);
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