More GLSL code:

- uniforms (only GetLocation, Uniform1f and Uniform4fv for now for demos);
- fix bugs and optimize array size handling;
- 2D texture sampling (needs Enable(TEXTURE_2D) to work);
- decrease built-in library assembly size by 30%.

1 files changed, 15 insertions, 16 deletions

diff --git a/progs/demos/glslnoise.c b/progs/demos/glslnoise.c
index 10414393371..463af12897a 100755
--- a/progs/demos/glslnoise.c
+++ b/progs/demos/glslnoise.c
@@ -2,7 +2,7 @@
  * GLSL noise demo.
  *

  * Michal Krol

- * 17 February 2006
+ * 20 February 2006
  *

  * Based on the original demo by:
  * Stefan Gustavson ([email protected]) 2004, 2005
@@ -28,6 +28,8 @@ static GLhandleARB fragShader;
 static GLhandleARB vertShader;

 static GLhandleARB program;

 

+static GLint uTime;

+

 static GLfloat u_time = 0.0f;

 
 static PFNGLCREATESHADEROBJECTARBPROC glCreateShaderObjectARB = NULL;

@@ -36,14 +38,15 @@ static PFNGLCOMPILESHADERARBPROC glCompileShaderARB = NULL;
 static PFNGLCREATEPROGRAMOBJECTARBPROC glCreateProgramObjectARB = NULL;

 static PFNGLATTACHOBJECTARBPROC glAttachObjectARB = NULL;

 static PFNGLLINKPROGRAMARBPROC glLinkProgramARB = NULL;

-static PFNGLUSEPROGRAMOBJECTARBPROC glUseProgramObjectARB = NULL;
+static PFNGLUSEPROGRAMOBJECTARBPROC glUseProgramObjectARB = NULL;

+static PFNGLGETUNIFORMLOCATIONARBPROC glGetUniformLocationARB = NULL;

+static PFNGLUNIFORM1FARBPROC glUniform1fARB = NULL;
 
 static void Redisplay (void)
 {
 	glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

 

-	/* XXX source from uniform time */

-	glTexCoord1f (u_time);
+	glUniform1fARB (uTime, u_time);
 
 	glPushMatrix ();
 	glutSolidSphere (2.0, 20, 10);

@@ -85,16 +88,11 @@ static void Key (unsigned char key, int x, int y)
 
 static void Init (void)
 {
-	static const char *fragShaderText =
+	static const char *fragShaderText =

+		"uniform float time;\n"
 		"void main () {\n"

-

-		/* XXX source from uniform time */

-		"	float time;\n"

-		"	time = gl_TexCoord[1].x;\n"

-

-		"	vec4 v;\n"

-		"	v = vec4 (4.0 * gl_TexCoord[0].xyz, 0.5 * time);\n"

-		"	gl_FragColor = gl_Color * vec4 ((0.5 + 0.5 * vec3 (noise1 (v))), 1.0);\n"

+		"	gl_FragColor = gl_Color * vec4 ((0.5 + 0.5 * vec3 (noise1 (\n"

+		"		vec4 (4.0 * gl_TexCoord[0].xyz, 0.5 * time)))), 1.0);\n"

 		"}\n"
 	;
 	static const char *vertShaderText =
@@ -102,9 +100,6 @@ static void Init (void)
 		"	gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n"

 		"	gl_TexCoord[0] = gl_Vertex;\n"

 		"	gl_FrontColor = gl_Color;\n"

-

-		/* XXX source from uniform time */

-		"	gl_TexCoord[1] = gl_MultiTexCoord0;\n"

 		"}\n"
 	;
 

@@ -136,6 +131,8 @@ static void Init (void)
 	glAttachObjectARB = (PFNGLATTACHOBJECTARBPROC) wglGetProcAddress ("glAttachObjectARB");

 	glLinkProgramARB = (PFNGLLINKPROGRAMARBPROC) wglGetProcAddress ("glLinkProgramARB");

 	glUseProgramObjectARB = (PFNGLUSEPROGRAMOBJECTARBPROC) wglGetProcAddress ("glUseProgramObjectARB");

+	glGetUniformLocationARB = (PFNGLGETUNIFORMLOCATIONARBPROC) GETPROCADDRESS ("glGetUniformLocationARB");

+	glUniform1fARB = (PFNGLUNIFORM1FARBPROC) GETPROCADDRESS ("glUniform1fARB");

 

 	fragShader = glCreateShaderObjectARB (GL_FRAGMENT_SHADER_ARB);

 	glShaderSourceARB (fragShader, 1, &fragShaderText, NULL);

@@ -150,6 +147,8 @@ static void Init (void)
 	glAttachObjectARB (program, vertShader);

 	glLinkProgramARB (program);

 	glUseProgramObjectARB (program);

+

+	uTime = glGetUniformLocationARB (program, "time");

 
 	glClearColor (0.0f, 0.1f, 0.3f, 1.0f);

 	glEnable (GL_CULL_FACE);