diff options
Diffstat (limited to 'progs/egl/opengles1/drawtex.c')
| -rw-r--r-- | progs/egl/opengles1/drawtex.c | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/progs/egl/opengles1/drawtex.c b/progs/egl/opengles1/drawtex.c new file mode 100644 index 0000000000..e9ac015340 --- /dev/null +++ b/progs/egl/opengles1/drawtex.c @@ -0,0 +1,217 @@ +/* + * Copyright (C) 2008 Tunsgten Graphics,Inc. All Rights Reserved. + */ + +/* + * Test GL_OES_draw_texture + * Brian Paul + * August 2008 + */ + +#define GL_GLEXT_PROTOTYPES + +#include <math.h> +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <GLES/gl.h> +#include <GLES/glext.h> + +#include "eglut.h" + + +static GLfloat view_posx = 10.0, view_posy = 20.0; +static GLfloat width = 200, height = 200; +static GLboolean animate = GL_FALSE; +static int win; + + +static void +draw(void) +{ + glClear(GL_COLOR_BUFFER_BIT); + + glDrawTexfOES(view_posx, view_posy, 0.0, width, height); +} + + +/* new window size or exposure */ +static void +reshape(int width, int height) +{ + GLfloat ar = (GLfloat) width / (GLfloat) height; + + glViewport(0, 0, (GLint) width, (GLint) height); + + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + +#ifdef GL_VERSION_ES_CM_1_0 + glFrustumf(-ar, ar, -1, 1, 5.0, 60.0); +#else + glFrustum(-ar, ar, -1, 1, 5.0, 60.0); +#endif + + glMatrixMode(GL_MODELVIEW); + glLoadIdentity(); + glTranslatef(0.0, 0.0, -15.0); +} + + +static float +dist(GLuint i, GLuint j, float x, float y) +{ + return sqrt((i-x) * (i-x) + (j-y) * (j-y)); +} + +static void +make_smile_texture(void) +{ +#define SZ 128 + GLenum Filter = GL_LINEAR; + GLubyte image[SZ][SZ][4]; + GLuint i, j; + GLint cropRect[4]; + + for (i = 0; i < SZ; i++) { + for (j = 0; j < SZ; j++) { + GLfloat d_mouth = dist(i, j, SZ/2, SZ/2); + GLfloat d_rt_eye = dist(i, j, SZ*3/4, SZ*3/4); + GLfloat d_lt_eye = dist(i, j, SZ*3/4, SZ*1/4); + if (d_rt_eye < SZ / 8 || d_lt_eye < SZ / 8) { + image[i][j][0] = 20; + image[i][j][1] = 50; + image[i][j][2] = 255; + image[i][j][3] = 255; + } + else if (i < SZ/2 && d_mouth < SZ/3) { + image[i][j][0] = 255; + image[i][j][1] = 20; + image[i][j][2] = 20; + image[i][j][3] = 255; + } + else { + image[i][j][0] = 200; + image[i][j][1] = 200; + image[i][j][2] = 200; + image[i][j][3] = 255; + } + } + } + + glActiveTexture(GL_TEXTURE0); /* unit 0 */ + glBindTexture(GL_TEXTURE_2D, 42); + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, SZ, SZ, 0, + GL_RGBA, GL_UNSIGNED_BYTE, image); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, Filter); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, Filter); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); + + cropRect[0] = 0; + cropRect[1] = 0; + cropRect[2] = SZ; + cropRect[3] = SZ; + glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_CROP_RECT_OES, cropRect); +#undef SZ +} + + + +static void +init(void) +{ + const char *ext = (char *) glGetString(GL_EXTENSIONS); + + if (!strstr(ext, "GL_OES_draw_texture")) { + fprintf(stderr, "Sorry, this program requires GL_OES_draw_texture"); + exit(1); + } + + glClearColor(0.4, 0.4, 0.4, 0.0); + + make_smile_texture(); + glEnable(GL_TEXTURE_2D); +} + + +static void +idle(void) +{ + if (animate) { + view_posx += 1.0; + view_posy += 2.0; + eglutPostRedisplay(); + } +} + +static void +key(unsigned char key) +{ + switch (key) { + case ' ': + animate = !animate; + break; + case 'w': + width -= 1.0f; + break; + case 'W': + width += 1.0f; + break; + case 'h': + height -= 1.0f; + break; + case 'H': + height += 1.0f; + break; + case 27: + eglutDestroyWindow(win); + exit(0); + break; + default: + break; + } +} + +static void +special_key(int key) +{ + switch (key) { + case EGLUT_KEY_LEFT: + view_posx -= 1.0; + break; + case EGLUT_KEY_RIGHT: + view_posx += 1.0; + break; + case EGLUT_KEY_UP: + view_posy += 1.0; + break; + case EGLUT_KEY_DOWN: + view_posy -= 1.0; + break; + default: + break; + } +} + +int +main(int argc, char *argv[]) +{ + eglutInitWindowSize(400, 300); + eglutInitAPIMask(EGLUT_OPENGL_ES1_BIT); + eglutInit(argc, argv); + + win = eglutCreateWindow("drawtex"); + + eglutIdleFunc(idle); + eglutReshapeFunc(reshape); + eglutDisplayFunc(draw); + eglutKeyboardFunc(key); + eglutSpecialFunc(special_key); + + init(); + + eglutMainLoop(); + + return 0; +} |