Mesa (master): progs/trivial: draw non-interleaved arrays out of one vbo
Keith Whitwell
keithw at kemper.freedesktop.org
Tue Mar 24 15:31:03 UTC 2009
Module: Mesa
Branch: master
Commit: 2312f697a27da366ecda9cbae9ddf8c63de910d5
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=2312f697a27da366ecda9cbae9ddf8c63de910d5
Author: Keith Whitwell <keithw at vmware.com>
Date: Tue Mar 24 15:27:21 2009 +0000
progs/trivial: draw non-interleaved arrays out of one vbo
---
progs/trivial/Makefile | 1 +
progs/trivial/SConscript | 1 +
progs/trivial/tri-multitex-vbo.c | 260 ++++++++++++++++++++++++++++++++++++++
3 files changed, 262 insertions(+), 0 deletions(-)
diff --git a/progs/trivial/Makefile b/progs/trivial/Makefile
index 082387d..69c71cb 100644
--- a/progs/trivial/Makefile
+++ b/progs/trivial/Makefile
@@ -111,6 +111,7 @@ SOURCES = \
tri-scissor-tri.c \
tri-stencil.c \
tri-stipple.c \
+ tri-multitex-vbo.c \
tri-tex.c \
tri-tex-3d.c \
tri-tri.c \
diff --git a/progs/trivial/SConscript b/progs/trivial/SConscript
index 6a9ffaf..480630e 100644
--- a/progs/trivial/SConscript
+++ b/progs/trivial/SConscript
@@ -107,6 +107,7 @@ progs = [
'tri-scissor-tri',
'tri-stencil',
'tri-stipple',
+ 'tri-multitex-vbo',
'tri-tex',
'tri-tex-3d',
'tri-tri',
diff --git a/progs/trivial/tri-multitex-vbo.c b/progs/trivial/tri-multitex-vbo.c
new file mode 100644
index 0000000..76e117a
--- /dev/null
+++ b/progs/trivial/tri-multitex-vbo.c
@@ -0,0 +1,260 @@
+/*
+ * Copyright (c) 1991, 1992, 1993 Silicon Graphics, Inc.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and
+ * its documentation for any purpose is hereby granted without fee, provided
+ * that (i) the above copyright notices and this permission notice appear in
+ * all copies of the software and related documentation, and (ii) the name of
+ * Silicon Graphics may not be used in any advertising or
+ * publicity relating to the software without the specific, prior written
+ * permission of Silicon Graphics.
+ *
+ * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF
+ * ANY KIND,
+ * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
+ * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * IN NO EVENT SHALL SILICON GRAPHICS BE LIABLE FOR
+ * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
+ * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+ * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
+ * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <GL/glew.h>
+#include <GL/glut.h>
+
+#define NR_VERTS 4
+
+struct {
+ GLfloat position[NR_VERTS][4];
+ GLubyte color[NR_VERTS][4];
+ GLfloat tex0[NR_VERTS][2];
+ GLfloat tex1[NR_VERTS][2];
+} verts = {
+
+ { { 0.9, -0.9, 0.0, 1.0 },
+ { 0.9, 0.9, 0.0, 1.0 },
+ { -0.9, 0.9, 0.0, 1.0 },
+ { -0.9, -0.9, 0.0, 1.0 } },
+
+ { { 0x00, 0x00, 0xff, 0x00 },
+ { 0x00, 0xff, 0x00, 0x00 },
+ { 0xff, 0x00, 0x00, 0x00 },
+ { 0xff, 0xff, 0xff, 0x00 }
+ },
+
+ { { 1, -1 },
+ { 1, 1 },
+ { -1, 1 },
+ { -1, -1 } },
+
+ { { 3, 0 },
+ { 0, 3 },
+ { -3, 0 },
+ { 0, -3} },
+
+};
+
+GLuint indices[] = { 0, 1, 2, 3 };
+
+GLuint arrayObj, elementObj;
+
+
+GLenum doubleBuffer;
+
+
+#define Offset(ptr, member) (void *)((const char *)&((ptr)->member) - (const char *)(ptr))
+
+static void Init(void)
+{
+ GLuint texObj[2];
+
+ fprintf(stderr, "GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
+ fprintf(stderr, "GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
+ fprintf(stderr, "GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR));
+
+ glClearColor(0.0, 0.0, 1.0, 0.0);
+
+ glGenTextures(2, texObj);
+
+#define SIZE 32
+ {
+ GLubyte tex2d[SIZE][SIZE][3];
+ GLint s, t;
+
+ for (s = 0; s < SIZE; s++) {
+ for (t = 0; t < SIZE; t++) {
+ tex2d[t][s][0] = s*255/(SIZE-1);
+ tex2d[t][s][1] = t*255/(SIZE-1);
+ tex2d[t][s][2] = 0;
+ }
+ }
+
+ glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+ glActiveTextureARB(GL_TEXTURE0_ARB);
+ glBindTexture(GL_TEXTURE_2D, texObj[0]);
+
+
+ glTexImage2D(GL_TEXTURE_2D, 0, 3, SIZE, SIZE, 0,
+ GL_RGB, GL_UNSIGNED_BYTE, tex2d);
+
+ glEnable(GL_TEXTURE_2D);
+ glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_R, GL_REPEAT);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+ glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
+ }
+
+ {
+ GLubyte tex2d[SIZE][SIZE][3];
+ GLint s, t;
+
+ for (s = 0; s < SIZE; s++) {
+ for (t = 0; t < SIZE; t++) {
+ GLboolean on = ((s/4) ^ (t/4)) & 1;
+ tex2d[t][s][0] = on ? 128 : 0;
+ tex2d[t][s][1] = on ? 128 : 0;
+ tex2d[t][s][2] = on ? 128 : 0;
+ }
+ }
+
+ glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+ glActiveTextureARB(GL_TEXTURE1_ARB);
+ glBindTexture(GL_TEXTURE_2D, texObj[1]);
+
+ glTexImage2D(GL_TEXTURE_2D, 0, 3, SIZE, SIZE, 0,
+ GL_RGB, GL_UNSIGNED_BYTE, tex2d);
+
+ glEnable(GL_TEXTURE_2D);
+ glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_ADD);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_R, GL_REPEAT);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+ glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
+ }
+
+ glActiveTextureARB( GL_TEXTURE0_ARB );
+
+
+ {
+
+ glGenBuffersARB(1, &arrayObj);
+ glGenBuffersARB(1, &elementObj);
+
+ glBindBufferARB(GL_ARRAY_BUFFER_ARB, arrayObj);
+ glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, elementObj);
+
+ glBufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts), &verts, GL_STATIC_DRAW_ARB);
+ glBufferDataARB(GL_ELEMENT_ARRAY_BUFFER_ARB, sizeof(indices), indices, GL_STATIC_DRAW_ARB);
+
+ glEnableClientState( GL_VERTEX_ARRAY );
+ glVertexPointer( 4, GL_FLOAT, 0, Offset(&verts, position) );
+
+ glEnableClientState( GL_COLOR_ARRAY );
+ glColorPointer( 4, GL_UNSIGNED_BYTE, 0, Offset(&verts, color) );
+
+ glClientActiveTextureARB( GL_TEXTURE0_ARB );
+ glEnableClientState( GL_TEXTURE_COORD_ARRAY );
+ glTexCoordPointer( 2, GL_FLOAT, 0, Offset(&verts, tex0) );
+
+ glClientActiveTextureARB( GL_TEXTURE1_ARB );
+ glEnableClientState( GL_TEXTURE_COORD_ARRAY );
+ glTexCoordPointer( 2, GL_FLOAT, 0, Offset(&verts, tex1) );
+
+ glClientActiveTextureARB( GL_TEXTURE0_ARB );
+ }
+}
+
+static void Reshape(int width, int height)
+{
+
+ glViewport(0, 0, (GLint)width, (GLint)height);
+
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+/* glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0); */
+ glMatrixMode(GL_MODELVIEW);
+}
+
+static void Key(unsigned char key, int x, int y)
+{
+
+ switch (key) {
+ case 27:
+ exit(1);
+ default:
+ return;
+ }
+
+ glutPostRedisplay();
+}
+
+static void Draw(void)
+{
+ glClear(GL_COLOR_BUFFER_BIT);
+
+ glDrawElements( GL_TRIANGLES, 3, GL_UNSIGNED_INT, NULL );
+
+ glFlush();
+
+ if (doubleBuffer) {
+ glutSwapBuffers();
+ }
+}
+
+static GLenum Args(int argc, char **argv)
+{
+ GLint i;
+
+ doubleBuffer = GL_FALSE;
+
+ for (i = 1; i < argc; i++) {
+ if (strcmp(argv[i], "-sb") == 0) {
+ doubleBuffer = GL_FALSE;
+ } else if (strcmp(argv[i], "-db") == 0) {
+ doubleBuffer = GL_TRUE;
+ } else {
+ fprintf(stderr, "%s (Bad option).\n", argv[i]);
+ return GL_FALSE;
+ }
+ }
+ return GL_TRUE;
+}
+
+int main(int argc, char **argv)
+{
+ GLenum type;
+
+ glutInit(&argc, argv);
+
+ if (Args(argc, argv) == GL_FALSE) {
+ exit(1);
+ }
+
+ glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
+
+ type = GLUT_RGB | GLUT_ALPHA;
+ type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
+ glutInitDisplayMode(type);
+
+ if (glutCreateWindow(*argv) == GL_FALSE) {
+ exit(1);
+ }
+
+ glewInit();
+ Init();
+
+ glutReshapeFunc(Reshape);
+ glutKeyboardFunc(Key);
+ glutDisplayFunc(Draw);
+ glutMainLoop();
+ return 0;
+}
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