diff options
Diffstat (limited to 'progs/trivial/tri-multitex-vbo.c')
-rw-r--r-- | progs/trivial/tri-multitex-vbo.c | 261 |
1 files changed, 261 insertions, 0 deletions
diff --git a/progs/trivial/tri-multitex-vbo.c b/progs/trivial/tri-multitex-vbo.c new file mode 100644 index 0000000000..e319447ac1 --- /dev/null +++ b/progs/trivial/tri-multitex-vbo.c @@ -0,0 +1,261 @@ +/* + * 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)); + fflush(stderr); + + 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; +} |