Bump to latest mesa in Debian

1 files changed, 289 insertions, 0 deletions

diff --git a/progs/demos/arbfslight.c b/progs/demos/arbfslight.c
new file mode 100644
index 00000000000..30332a3f641
--- /dev/null
+++ b/progs/demos/arbfslight.c
@@ -0,0 +1,289 @@
+/*
+ * Use GL_ARB_fragment_shader and GL_ARB_vertex_shader to implement
+ * simple per-pixel lighting.
+ *
+ * Michal Krol
+ * 20 February 2006
+ *
+ * Based on the original demo by:
+ * Brian Paul
+ * 17 April 2003
+ */
+
+#ifdef WIN32
+#include <windows.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <GL/gl.h>
+#include <GL/glut.h>
+#include <GL/glext.h>
+
+#ifdef WIN32
+#define GETPROCADDRESS wglGetProcAddress
+#else
+#define GETPROCADDRESS glutGetProcAddress
+#endif
+
+static GLfloat diffuse[4] = { 0.5f, 0.5f, 1.0f, 1.0f };
+static GLfloat specular[4] = { 0.8f, 0.8f, 0.8f, 1.0f };
+static GLfloat lightPos[4] = { 0.0f, 10.0f, 20.0f, 1.0f };
+static GLfloat delta = 1.0f;
+
+static GLhandleARB fragShader;
+static GLhandleARB vertShader;
+static GLhandleARB program;
+
+static GLint uLightPos;
+static GLint uDiffuse;
+static GLint uSpecular;
+
+static GLboolean anim = GL_TRUE;
+static GLboolean wire = GL_FALSE;
+static GLboolean pixelLight = GL_TRUE;
+
+static GLint t0 = 0;
+static GLint frames = 0;
+
+static GLfloat xRot = 0.0f, yRot = 0.0f;
+
+static PFNGLCREATESHADEROBJECTARBPROC glCreateShaderObjectARB = NULL;
+static PFNGLSHADERSOURCEARBPROC glShaderSourceARB = NULL;
+static PFNGLCOMPILESHADERARBPROC glCompileShaderARB = NULL;
+static PFNGLCREATEPROGRAMOBJECTARBPROC glCreateProgramObjectARB = NULL;
+static PFNGLATTACHOBJECTARBPROC glAttachObjectARB = NULL;
+static PFNGLLINKPROGRAMARBPROC glLinkProgramARB = NULL;
+static PFNGLUSEPROGRAMOBJECTARBPROC glUseProgramObjectARB = NULL;
+static PFNGLGETUNIFORMLOCATIONARBPROC glGetUniformLocationARB = NULL;
+static PFNGLUNIFORM4FVARBPROC glUniform4fvARB = NULL;
+
+static void Redisplay (void)
+{
+	glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+	if (pixelLight)
+	{
+		glUseProgramObjectARB (program);
+		glUniform4fvARB (uLightPos, 1, lightPos);
+		glDisable(GL_LIGHTING);
+	}
+	else
+	{
+		glUseProgramObjectARB (0);
+		glLightfv (GL_LIGHT0, GL_POSITION, lightPos);
+		glEnable(GL_LIGHTING);
+	}
+
+	glPushMatrix ();
+	glRotatef (xRot, 1.0f, 0.0f, 0.0f);
+	glRotatef (yRot, 0.0f, 1.0f, 0.0f);
+	glutSolidSphere (2.0, 10, 5);
+	glPopMatrix ();
+
+	glutSwapBuffers();
+	frames++;
+
+	if (anim)
+	{
+		GLint t = glutGet (GLUT_ELAPSED_TIME);
+		if (t - t0 >= 5000)
+		{
+			GLfloat seconds = (GLfloat) (t - t0) / 1000.0f;
+			GLfloat fps = frames / seconds;
+			printf ("%d frames in %6.3f seconds = %6.3f FPS\n", frames, seconds, fps);
+			t0 = t;
+			frames = 0;
+		}
+	}
+}
+
+static void Idle (void)
+{
+	lightPos[0] += delta;
+	if (lightPos[0] > 25.0f || lightPos[0] < -25.0f)
+		delta = -delta;
+	glutPostRedisplay ();
+}
+
+static void Reshape (int width, int height)
+{
+	glViewport (0, 0, width, height);
+	glMatrixMode (GL_PROJECTION);
+	glLoadIdentity ();
+	glFrustum (-1.0, 1.0, -1.0, 1.0, 5.0, 25.0);
+	glMatrixMode (GL_MODELVIEW);
+	glLoadIdentity ();
+	glTranslatef (0.0f, 0.0f, -15.0f);
+}
+
+static void Key (unsigned char key, int x, int y)
+{
+	(void) x;
+	(void) y;
+
+	switch (key)
+	{
+	case ' ':
+	case 'a':
+		anim = !anim;
+		if (anim)
+			glutIdleFunc (Idle);
+		else
+			glutIdleFunc (NULL);
+		break;
+	case 'x':
+		lightPos[0] -= 1.0f;
+		break;
+	case 'X':
+		lightPos[0] += 1.0f;
+		break;
+	case 'w':
+		wire = !wire;
+		if (wire)
+			glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
+		else
+			glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
+		break;
+	case 'p':
+		pixelLight = !pixelLight;
+		if (pixelLight)
+			printf ("Per-pixel lighting\n");
+		else
+			printf ("Conventional lighting\n");
+		break;
+	case 27:
+		exit(0);
+		break;
+	}
+	glutPostRedisplay ();
+}
+
+static void SpecialKey (int key, int x, int y)
+{
+	const GLfloat step = 3.0f;
+
+	(void) x;
+	(void) y;
+
+	switch (key)
+	{
+	case GLUT_KEY_UP:
+		xRot -= step;
+		break;
+	case GLUT_KEY_DOWN:
+		xRot += step;
+		break;
+	case GLUT_KEY_LEFT:
+		yRot -= step;
+		break;
+	case GLUT_KEY_RIGHT:
+		yRot += step;
+		break;
+	}
+	glutPostRedisplay ();
+}
+
+static void Init (void)
+{
+	static const char *fragShaderText =
+		"uniform vec4 lightPos;\n"
+		"uniform vec4 diffuse;\n"
+		"uniform vec4 specular;\n"
+		"void main () {\n"
+		"	// Compute dot product of light direction and normal vector\n"
+		"	float dotProd;\n"
+		"	dotProd = clamp (dot (normalize (lightPos).xyz, normalize (gl_TexCoord[0]).xyz), 0.0, 1.0);\n"
+		"	// Compute diffuse and specular contributions\n"
+		"	gl_FragColor = diffuse * dotProd + specular * pow (dotProd, 20.0);\n"
+		"}\n"
+	;
+	static const char *vertShaderText =
+		"void main () {\n"
+		"	gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
+		"	gl_TexCoord[0] = vec4 (gl_NormalMatrix * gl_Normal, 1.0);\n"
+		"}\n"
+	;
+
+	if (!glutExtensionSupported ("GL_ARB_fragment_shader"))
+	{
+		printf ("Sorry, this demo requires GL_ARB_fragment_shader\n");
+		exit(1);
+	}
+	if (!glutExtensionSupported ("GL_ARB_shader_objects"))
+	{
+		printf ("Sorry, this demo requires GL_ARB_shader_objects\n");
+		exit(1);
+	}
+	if (!glutExtensionSupported ("GL_ARB_shading_language_100"))
+	{
+		printf ("Sorry, this demo requires GL_ARB_shading_language_100\n");
+		exit(1);
+	}
+	if (!glutExtensionSupported ("GL_ARB_vertex_shader"))
+	{
+		printf ("Sorry, this demo requires GL_ARB_vertex_shader\n");
+		exit(1);
+	}
+
+	glCreateShaderObjectARB = (PFNGLCREATESHADEROBJECTARBPROC) GETPROCADDRESS ("glCreateShaderObjectARB");
+	glShaderSourceARB = (PFNGLSHADERSOURCEARBPROC) GETPROCADDRESS ("glShaderSourceARB");
+	glCompileShaderARB = (PFNGLCOMPILESHADERARBPROC) GETPROCADDRESS ("glCompileShaderARB");
+	glCreateProgramObjectARB = (PFNGLCREATEPROGRAMOBJECTARBPROC) GETPROCADDRESS ("glCreateProgramObjectARB");
+	glAttachObjectARB = (PFNGLATTACHOBJECTARBPROC) GETPROCADDRESS ("glAttachObjectARB");
+	glLinkProgramARB = (PFNGLLINKPROGRAMARBPROC) GETPROCADDRESS ("glLinkProgramARB");
+	glUseProgramObjectARB = (PFNGLUSEPROGRAMOBJECTARBPROC) GETPROCADDRESS ("glUseProgramObjectARB");
+	glGetUniformLocationARB = (PFNGLGETUNIFORMLOCATIONARBPROC) GETPROCADDRESS ("glGetUniformLocationARB");
+	glUniform4fvARB = (PFNGLUNIFORM4FVARBPROC) GETPROCADDRESS ("glUniform4fvARB");
+
+	fragShader = glCreateShaderObjectARB (GL_FRAGMENT_SHADER_ARB);
+	glShaderSourceARB (fragShader, 1, &fragShaderText, NULL);
+	glCompileShaderARB (fragShader);
+
+	vertShader = glCreateShaderObjectARB (GL_VERTEX_SHADER_ARB);
+	glShaderSourceARB (vertShader, 1, &vertShaderText, NULL);
+	glCompileShaderARB (vertShader);
+
+	program = glCreateProgramObjectARB ();
+	glAttachObjectARB (program, fragShader);
+	glAttachObjectARB (program, vertShader);
+	glLinkProgramARB (program);
+	glUseProgramObjectARB (program);
+
+	uLightPos = glGetUniformLocationARB (program, "lightPos");
+	uDiffuse = glGetUniformLocationARB (program, "diffuse");
+	uSpecular = glGetUniformLocationARB (program, "specular");
+
+	glUniform4fvARB (uDiffuse, 1, diffuse);
+	glUniform4fvARB (uSpecular, 1, specular);
+
+	glClearColor (0.3f, 0.3f, 0.3f, 0.0f);
+	glEnable (GL_DEPTH_TEST);
+	glEnable (GL_LIGHT0);
+	glEnable (GL_LIGHTING);
+	glMaterialfv (GL_FRONT_AND_BACK, GL_DIFFUSE, diffuse);
+	glMaterialfv (GL_FRONT_AND_BACK, GL_SPECULAR, specular);
+	glMaterialf (GL_FRONT_AND_BACK, GL_SHININESS, 20.0f);
+
+	printf ("GL_RENDERER = %s\n", (const char *) glGetString (GL_RENDERER));
+	printf ("Press p to toggle between per-pixel and per-vertex lighting\n");
+}
+
+int main (int argc, char *argv[])
+{
+	glutInit (&argc, argv);
+	glutInitWindowPosition ( 0, 0);
+	glutInitWindowSize (200, 200);
+	glutInitDisplayMode (GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
+	glutCreateWindow (argv[0]);
+	glutReshapeFunc (Reshape);
+	glutKeyboardFunc (Key);
+	glutSpecialFunc (SpecialKey);
+	glutDisplayFunc (Redisplay);
+	if (anim)
+		glutIdleFunc (Idle);
+	Init ();
+	glutMainLoop ();
+	return 0;
+}
+