diff options
Diffstat (limited to 'progs/trivial')
| -rw-r--r-- | progs/trivial/.gitignore | 1 | ||||
| -rw-r--r-- | progs/trivial/Makefile | 1 | ||||
| -rw-r--r-- | progs/trivial/SConscript | 1 | ||||
| -rw-r--r-- | progs/trivial/quad-tex-sub.c | 198 |
4 files changed, 201 insertions, 0 deletions
diff --git a/progs/trivial/.gitignore b/progs/trivial/.gitignore index fb7f0f47781..aec4c94527d 100644 --- a/progs/trivial/.gitignore +++ b/progs/trivial/.gitignore @@ -59,6 +59,7 @@ quad-tex-2d quad-tex-3d quad-tex-alpha quad-tex-pbo +quad-tex-sub quad-unfilled quad-unfilled-clip quad-unfilled-stipple diff --git a/progs/trivial/Makefile b/progs/trivial/Makefile index 0e70e80b6db..082387d86ea 100644 --- a/progs/trivial/Makefile +++ b/progs/trivial/Makefile @@ -70,6 +70,7 @@ SOURCES = \ quad-tex-3d.c \ quad-tex-alpha.c \ quad-tex-pbo.c \ + quad-tex-sub.c \ quad-unfilled-clip.c \ quad-unfilled-stipple.c \ quad-unfilled.c \ diff --git a/progs/trivial/SConscript b/progs/trivial/SConscript index 9444cdbe7ed..6a9ffafe509 100644 --- a/progs/trivial/SConscript +++ b/progs/trivial/SConscript @@ -66,6 +66,7 @@ progs = [ 'quad-tex-3d', 'quad-tex-alpha', 'quad-tex-pbo', + 'quad-tex-sub', 'quad-unfilled-clip', 'quad-unfilled-stipple', 'quad-unfilled', diff --git a/progs/trivial/quad-tex-sub.c b/progs/trivial/quad-tex-sub.c new file mode 100644 index 00000000000..a7c92ce20d1 --- /dev/null +++ b/progs/trivial/quad-tex-sub.c @@ -0,0 +1,198 @@ +/* + * 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 CI_OFFSET_1 16 +#define CI_OFFSET_2 32 + +#define SIZE 16 +GLenum doubleBuffer; +GLint line = 0; + +static void MakeImage() +{ + GLubyte tex2d[SIZE][SIZE][3]; + GLint s, t; + + for (s = 0; s < SIZE; s++) { + for (t = 0; t < SIZE; t++) { + tex2d[s][t][0] = s*255/(SIZE-1); + tex2d[s][t][1] = t*255/(SIZE-1); + tex2d[s][t][2] = 0*255/(SIZE-1); + } + } + + glPixelStorei(GL_UNPACK_ALIGNMENT, 1); + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, + SIZE, SIZE, + 0, + GL_RGB, GL_UNSIGNED_BYTE, tex2d); + glPixelStorei(GL_UNPACK_ALIGNMENT, 4); + glEnable(GL_TEXTURE_2D); +} + +static void UpdateLine() +{ + GLubyte tex[SIZE][3]; + GLint s, t; + + t = line % SIZE; + + for (s = 0; s < SIZE; s++) { + tex[s][0] = s*255/(SIZE-1); + tex[s][1] = t*255/(SIZE-1); + tex[s][2] = 255; + } + + glPixelStorei(GL_UNPACK_ALIGNMENT, 1); + glTexSubImage2D(GL_TEXTURE_2D, 0, + 0, t, + SIZE, 1, + GL_RGB, GL_UNSIGNED_BYTE, tex); + glPixelStorei(GL_UNPACK_ALIGNMENT, 4); +} + +static void Init(void) +{ + 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); + + glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); + + MakeImage(); + UpdateLine(); + line++; +} + +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: + UpdateLine(); + line++; + break; + } + + glutPostRedisplay(); +} + +static void Draw(void) +{ + glClear(GL_COLOR_BUFFER_BIT); + + glBegin(GL_QUADS); + glTexCoord2f(1,0); + glVertex3f( 0.9, -0.9, -30.0); + glTexCoord2f(1,1); + glVertex3f( 0.9, 0.9, -30.0); + glTexCoord2f(0,1); + glVertex3f(-0.9, 0.9, -30.0); + glTexCoord2f(0,0); + glVertex3f(-0.9, -0.9, -30.0); + glEnd(); + + 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; +} |