Demos (master): vbo-drawarrays-2101010: GL_ARB_vertex_type_2_10_10_10_rev vbo test

[Dave Airlie]

Module: Demos
Branch: master
Commit: 4af60307c3d862ba9e4b1045b251781420d7d564
URL:    http://cgit.freedesktop.org/mesa/demos/commit/?id=4af60307c3d862ba9e4b1045b251781420d7d564

Author: Dave Airlie <airlied at redhat.com>
Date:   Tue Aug  2 20:22:29 2011 +0100

vbo-drawarrays-2101010: GL_ARB_vertex_type_2_10_10_10_rev vbo test

tests extension works using values in a VBO.

also useful for proving to me I lack GL knowledge,
	1. modelview/projection matrix needs VP code
	2. w defaults to 1 in the vertex data, so passing in 0 will break

---

 src/trivial/CMakeLists.txt           |    1 +
 src/trivial/Makefile.am              |    1 +
 src/trivial/vbo-drawarrays-2101010.c |  168 ++++++++++++++++++++++++++++++++++
 3 files changed, 170 insertions(+), 0 deletions(-)

diff --git a/src/trivial/CMakeLists.txt b/src/trivial/CMakeLists.txt
index 26598a0..a8e5443 100644
--- a/src/trivial/CMakeLists.txt
+++ b/src/trivial/CMakeLists.txt
@@ -173,6 +173,7 @@ set (targets
 	tri-z
 	tri-z-eq
 	vbo-drawarrays
+	vbo-drawarrays-2101010
 	vbo-drawelements
 	vbo-drawrange
 	vbo-noninterleaved
diff --git a/src/trivial/Makefile.am b/src/trivial/Makefile.am
index 844eb58..c2d3a15 100644
--- a/src/trivial/Makefile.am
+++ b/src/trivial/Makefile.am
@@ -180,6 +180,7 @@ bin_PROGRAMS = \
 	tri-z \
 	tri-z-eq \
 	vbo-drawarrays \
+	vbo-drawarrays-2101010 \
 	vbo-drawelements \
 	vbo-drawrange \
 	vbo-noninterleaved \
diff --git a/src/trivial/vbo-drawarrays-2101010.c b/src/trivial/vbo-drawarrays-2101010.c
new file mode 100644
index 0000000..358d249
--- /dev/null
+++ b/src/trivial/vbo-drawarrays-2101010.c
@@ -0,0 +1,168 @@
+/* Copyright (c) 2011 Dave Airlie
+   based on vbo-drawarrays.c, which should be MIT licensed */
+
+/* Basic VBO testing ARB_vertex_type_2_10_10_10_rev */
+
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <GL/glew.h>
+#include "glut_wrap.h"
+
+#define i32to10(x) ((x) >= 0 ? (x & 0x1ff) : 1024-(abs((x))& 0x1ff))
+#define i32to2(x) ((x) >= 0 ? (x & 0x1) : 3-abs((x)))
+
+static unsigned iconv(int x, int y, int z, int w)
+{
+	unsigned val;
+
+	val = i32to10(x);
+	val |= i32to10(y) << 10;
+	val |= i32to10(z) << 20;
+	val |= i32to2(w) << 30;
+	return val;
+}
+#define conv(x,y,z,w) (((x) & 0x3ff) | ((y) & 0x3ff) << 10 | ((z) & 0x3ff)<< 20 | ((w) & 0x3) << 30)
+
+struct {
+   GLuint pos;
+   GLuint color;
+} verts[3];
+
+#define XYVAL 90
+#define ZVAL -30
+
+#define COLVAL 820
+
+static void SetupVerts(void)
+{
+  verts[0].pos = iconv(-XYVAL, -XYVAL, ZVAL, 1);
+  verts[0].color = conv(COLVAL, 0, 0, 0);
+
+  verts[1].pos = iconv(XYVAL, -XYVAL, ZVAL, 1);
+  verts[1].color = conv(0, COLVAL, 0, 0);
+
+  verts[2].pos = iconv(0, XYVAL, ZVAL, 1);
+  verts[2].color = conv(0, 0, COLVAL, 0);
+}
+
+GLuint arrayObj, elementObj;
+
+static void Init( void )
+{
+   GLint errno;
+   GLuint prognum;
+   
+   static const char *prog1 =
+      "!!ARBvp1.0\n"
+      "PARAM mvp[4] = {state.matrix.mvp};\n"
+      "DP4 result.position.x, vertex.position, mvp[0]; \n"
+      "DP4 result.position.y, vertex.position, mvp[1]; \n"
+      "DP4 result.position.z, vertex.position, mvp[2]; \n"
+      "DP4 result.position.w, vertex.position, mvp[3]; \n"
+      "MOV  result.color, vertex.color;\n"
+      "END\n";
+
+#ifndef GL_ARB_vertex_type_2_10_10_10_rev
+   fprintf(stderr,"built without ARB_vertex_type_2_10_10_10_rev\n");
+   exit(1);
+#endif
+
+  if (!glutExtensionSupported("GL_ARB_vertex_type_2_10_10_10_rev")){
+     fprintf(stderr,"requires ARB_vertex_type_2_10_10_10_rev\n");
+     exit(1);
+   }
+
+   glGenProgramsARB(1, &prognum);
+   glBindProgramARB(GL_VERTEX_PROGRAM_ARB, prognum);
+   glProgramStringARB(GL_VERTEX_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
+		      strlen(prog1), (const GLubyte *) prog1);
+
+   assert(glIsProgramARB(prognum));
+   errno = glGetError();
+
+   if (errno != GL_NO_ERROR)
+   {
+      GLint errorpos;
+
+      glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &errorpos);
+      printf("errorpos: %d\n", errorpos);
+      printf("%s\n", (char *)glGetString(GL_PROGRAM_ERROR_STRING_ARB));
+   }
+
+
+   glEnableClientState( GL_VERTEX_ARRAY );
+   glEnableClientState( GL_COLOR_ARRAY );
+
+   SetupVerts();
+
+   glGenBuffersARB(1, &arrayObj);
+   glBindBufferARB(GL_ARRAY_BUFFER_ARB, arrayObj);
+   glBufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts), verts, GL_STATIC_DRAW_ARB);
+
+#ifdef GL_ARB_vertex_type_2_10_10_10_rev
+   glVertexPointer( 4, GL_INT_2_10_10_10_REV, sizeof(verts[0]), 0 );
+   glColorPointer( 4, GL_UNSIGNED_INT_2_10_10_10_REV, sizeof(verts[0]), (void *)(sizeof(unsigned int)) );
+#endif
+}
+
+
+
+static void Display( void )
+{
+   glClearColor(0.3, 0.3, 0.3, 1);
+   glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+   glEnable(GL_VERTEX_PROGRAM_ARB);
+
+   glDrawArrays( GL_TRIANGLES, 0, 3 );
+
+   glFlush();
+}
+
+
+static void Reshape( int width, int height )
+{
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glOrtho(-100.0, 100.0, -100.0, 100.0, -0.5, 1000.0);
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case 27:
+         exit(0);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+
+
+int main( int argc, char *argv[] )
+{
+   glutInit( &argc, argv );
+   glutInitWindowPosition( 0, 0 );
+   glutInitWindowSize( 250, 250 );
+   glutInitDisplayMode( GLUT_RGB | GLUT_SINGLE | GLUT_DEPTH );
+   glutCreateWindow(argv[0]);
+   glewInit();
+   glutReshapeFunc( Reshape );
+   glutKeyboardFunc( Key );
+   glutDisplayFunc( Display );
+
+   glewInit();
+   Init();
+   glutMainLoop();
+   return 0;
+}