diff options
Diffstat (limited to 'progs/fpglsl/fp-tri.c')
| -rw-r--r-- | progs/fpglsl/fp-tri.c | 420 |
1 files changed, 0 insertions, 420 deletions
diff --git a/progs/fpglsl/fp-tri.c b/progs/fpglsl/fp-tri.c deleted file mode 100644 index 8af09845dd..0000000000 --- a/progs/fpglsl/fp-tri.c +++ /dev/null @@ -1,420 +0,0 @@ - -#include <stdio.h> -#include <string.h> -#include <stdlib.h> - -#ifndef WIN32 -#include <unistd.h> -#include <signal.h> -#endif - -#include <GL/glew.h> -#include <GL/glut.h> - -#include "readtex.c" - - -#define TEXTURE_FILE "../images/bw.rgb" - -unsigned show_fps = 0; -unsigned int frame_cnt = 0; -void alarmhandler(int); -static const char *filename = NULL; - -static GLuint fragShader; -static GLuint vertShader; -static GLuint program; - - -static void usage(char *name) -{ - fprintf(stderr, "usage: %s [ options ] shader_filename\n", name); -#ifndef WIN32 - fprintf(stderr, "\n" ); - fprintf(stderr, "options:\n"); - fprintf(stderr, " -fps show frames per second\n"); -#endif -} - -#ifndef WIN32 -void alarmhandler (int sig) -{ - if (sig == SIGALRM) { - printf("%d frames in 5.0 seconds = %.3f FPS\n", frame_cnt, - frame_cnt / 5.0); - - frame_cnt = 0; - } - signal(SIGALRM, alarmhandler); - alarm(5); -} -#endif - - - - -static void load_and_compile_shader(GLuint shader, const char *text) -{ - GLint stat; - - glShaderSource(shader, 1, (const GLchar **) &text, NULL); - - glCompileShader(shader); - - glGetShaderiv(shader, GL_COMPILE_STATUS, &stat); - if (!stat) { - GLchar log[1000]; - GLsizei len; - glGetShaderInfoLog(shader, 1000, &len, log); - fprintf(stderr, "fp-tri: problem compiling shader:\n%s\n", log); - exit(1); - } -} - -static void read_shader(GLuint shader, const char *filename) -{ - const int max = 100*1000; - int n; - char *buffer = (char*) malloc(max); - FILE *f = fopen(filename, "r"); - if (!f) { - fprintf(stderr, "fp-tri: Unable to open shader file %s\n", filename); - exit(1); - } - - n = fread(buffer, 1, max, f); - printf("fp-tri: read %d bytes from shader file %s\n", n, filename); - if (n > 0) { - buffer[n] = 0; - load_and_compile_shader(shader, buffer); - } - - fclose(f); - free(buffer); -} - -static void check_link(GLuint prog) -{ - GLint stat; - glGetProgramiv(prog, GL_LINK_STATUS, &stat); - if (!stat) { - GLchar log[1000]; - GLsizei len; - glGetProgramInfoLog(prog, 1000, &len, log); - fprintf(stderr, "Linker error:\n%s\n", log); - } -} - -static void setup_uniforms() -{ - { - GLint loc1f = glGetUniformLocationARB(program, "Offset1f"); - GLint loc2f = glGetUniformLocationARB(program, "Offset2f"); - GLint loc4f = glGetUniformLocationARB(program, "Offset4f"); - GLfloat vecKer[] = - { 1.0, 0.0, 0.0, 1.0, - 0.0, 1.0, 0.0, 1.0, - 1.0, 0.0, 0.0, 1.0, - 0.0, 0.0, 0.0, 1.0 - }; - if (loc1f >= 0) - glUniform1fv(loc1f, 16, vecKer); - - if (loc2f >= 0) - glUniform2fv(loc2f, 8, vecKer); - - if (loc4f >= 0) - glUniform4fv(loc4f, 4, vecKer); - - } - - { - GLint loci = glGetUniformLocationARB(program, "KernelSizeInt"); - if (loci >= 0) - glUniform1i(loci, 4); - } - { - GLint loc1f = glGetUniformLocationARB(program, "KernelValue1f"); - GLint loc2f = glGetUniformLocationARB(program, "KernelValue2f"); - GLint loc4f = glGetUniformLocationARB(program, "KernelValue4f"); - GLfloat vecKer[] = - { 1.0, 0.0, 0.0, 0.25, - 0.0, 1.0, 0.0, 0.25, - 0.0, 0.0, 1.0, 0.25, - 0.0, 0.0, 0.0, 0.25, - 0.5, 0.0, 0.0, 0.35, - 0.0, 0.5, 0.0, 0.35, - 0.0, 0.0, 0.5, 0.35, - 0.0, 0.0, 0.0, 0.35 - }; - if (loc1f >= 0) - glUniform1fv(loc1f, 16, vecKer); - - if (loc2f >= 0) - glUniform2fv(loc2f, 8, vecKer); - - if (loc4f >= 0) - glUniform4fv(loc4f, 4, vecKer); - } -} - -static void prepare_shaders() -{ - static const char *fragShaderText = - "void main() {\n" - " gl_FragColor = gl_Color;\n" - "}\n"; - static const char *vertShaderText = - "void main() {\n" - " gl_FrontColor = gl_Color;\n" - " gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n" - "}\n"; - fragShader = glCreateShader(GL_FRAGMENT_SHADER); - if (filename) - read_shader(fragShader, filename); - else - load_and_compile_shader(fragShader, fragShaderText); - - - vertShader = glCreateShader(GL_VERTEX_SHADER); - load_and_compile_shader(vertShader, vertShaderText); - - program = glCreateProgram(); - glAttachShader(program, fragShader); - glAttachShader(program, vertShader); - glLinkProgram(program); - check_link(program); - glUseProgram(program); - - setup_uniforms(); -} - -#define LEVELS 8 -#define SIZE (1<<LEVELS) -static int TexWidth = SIZE, TexHeight = SIZE; - - -static void -ResetTextureLevel( int i ) -{ - GLubyte tex2d[SIZE*SIZE][4]; - - { - GLint Width = TexWidth / (1 << i); - GLint Height = TexHeight / (1 << i); - GLint s, t; - - for (s = 0; s < Width; s++) { - for (t = 0; t < Height; t++) { - tex2d[t*Width+s][0] = ((s / 16) % 2) ? 0 : 255; - tex2d[t*Width+s][1] = ((t / 16) % 2) ? 0 : 255; - tex2d[t*Width+s][2] = 128; - tex2d[t*Width+s][3] = 255; - } - } - - glPixelStorei(GL_UNPACK_ALIGNMENT, 1); - - glTexImage2D(GL_TEXTURE_2D, i, GL_RGB, Width, Height, 0, - GL_RGBA, GL_UNSIGNED_BYTE, tex2d); - } -} - - -static void -ResetTexture( void ) -{ - int i; - - for (i = 0; i <= LEVELS; i++) - { - ResetTextureLevel(i); - } -} - -static void Init( void ) -{ - GLuint Texture; - - /* Load texture */ - glGenTextures(1, &Texture); - glBindTexture(GL_TEXTURE_2D, Texture); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); - glPixelStorei(GL_UNPACK_ALIGNMENT, 1); - if (!LoadRGBMipmaps(TEXTURE_FILE, GL_RGB)) { - printf("Error: couldn't load texture image file %s\n", TEXTURE_FILE); - exit(1); - } - - - glGenTextures(1, &Texture); - glActiveTextureARB(GL_TEXTURE0_ARB + 1); - glBindTexture(GL_TEXTURE_2D, Texture); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); - glPixelStorei(GL_UNPACK_ALIGNMENT, 1); - - { - GLubyte data[32][32]; - int width = 32; - int height = 32; - int i; - int j; - - for (i = 0; i < 32; i++) - for (j = 0; j < 32; j++) - { - /** - ** +-----------+ - ** | W | - ** | +-----+ | - ** | | | | - ** | | B | | - ** | | | | - ** | +-----+ | - ** | | - ** +-----------+ - **/ - int i2 = i - height / 2; - int j2 = j - width / 2; - int h8 = height / 8; - int w8 = width / 8; - if ( -h8 <= i2 && i2 <= h8 && -w8 <= j2 && j2 <= w8 ) { - data[i][j] = 0x00; - } else if ( -2 * h8 <= i2 && i2 <= 2 * h8 && -2 * w8 <= j2 && j2 <= 2 * w8 ) { - data[i][j] = 0x55; - } else if ( -3 * h8 <= i2 && i2 <= 3 * h8 && -3 * w8 <= j2 && j2 <= 3 * w8 ) { - data[i][j] = 0xaa; - } else { - data[i][j] = 0xff; - } - } - - glTexImage2D( GL_TEXTURE_2D, 0, - GL_ALPHA8, - 32, 32, 0, - GL_ALPHA, GL_UNSIGNED_BYTE, data ); - } - - glGenTextures(1, &Texture); - glActiveTextureARB(GL_TEXTURE0_ARB + 2); - glBindTexture(GL_TEXTURE_2D, Texture); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); - glPixelStorei(GL_UNPACK_ALIGNMENT, 1); - ResetTexture(); - - glClearColor(.1, .3, .5, 0); -} - - - - -static void args(int argc, char *argv[]) -{ - GLint i; - - for (i = 1; i < argc; i++) { - if (strcmp(argv[i], "-fps") == 0) { - show_fps = 1; - } - else if (i == argc - 1) { - filename = argv[i]; - } - else { - usage(argv[0]); - exit(1); - } - } -} - - - - - -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 CleanUp(void) -{ - glDeleteShader(fragShader); - glDeleteShader(vertShader); - glDeleteProgram(program); -} - -static void Key(unsigned char key, int x, int y) -{ - - switch (key) { - case 27: - CleanUp(); - exit(1); - default: - break; - } - - glutPostRedisplay(); -} - -static void Display(void) -{ - glClear(GL_COLOR_BUFFER_BIT); - - glUseProgram(program); - glProgramLocalParameter4fARB(GL_FRAGMENT_PROGRAM_ARB, 0, 1.0, 1.0, 0.0, 0.0); - glProgramLocalParameter4fARB(GL_FRAGMENT_PROGRAM_ARB, 1, 0.0, 0.0, 1.0, 1.0); - glBegin(GL_TRIANGLES); - - glColor3f(0,0,1); - glTexCoord3f(1,1,0); - glVertex3f( 0.9, -0.9, -30.0); - - glColor3f(1,0,0); - glTexCoord3f(1,-1,0); - glVertex3f( 0.9, 0.9, -30.0); - - glColor3f(0,1,0); - glTexCoord3f(-1,0,0); - glVertex3f(-0.9, 0.0, -30.0); - glEnd(); - - glFlush(); - if (show_fps) { - ++frame_cnt; - glutPostRedisplay(); - } -} - - -int main(int argc, char **argv) -{ - glutInit(&argc, argv); - glutInitWindowPosition(0, 0); - glutInitWindowSize(250, 250); - glutInitDisplayMode(GLUT_RGB | GLUT_SINGLE | GLUT_DEPTH); - args(argc, argv); - glutCreateWindow(filename ? filename : "fp-tri"); - glewInit(); - glutReshapeFunc(Reshape); - glutKeyboardFunc(Key); - glutDisplayFunc(Display); - prepare_shaders(); - Init(); -#ifndef WIN32 - if (show_fps) { - signal(SIGALRM, alarmhandler); - alarm(5); - } -#endif - glutMainLoop(); - return 0; -} |