From becb393d42504e59811a3a7c9f077baffab5ce5d Mon Sep 17 00:00:00 2001 From: Brian Date: Fri, 15 Dec 2006 09:31:14 -0700 Subject: Use extfuncs.h helper. Added command line options for loading vertex/fragment shaders from files. --- progs/demos/Makefile | 7 ++ progs/demos/fslight.c | 208 ++++++++++++++++++++++++++++++++++++++++---------- 2 files changed, 173 insertions(+), 42 deletions(-) (limited to 'progs') diff --git a/progs/demos/Makefile b/progs/demos/Makefile index 4623d6c8d9..6369746f00 100644 --- a/progs/demos/Makefile +++ b/progs/demos/Makefile @@ -113,6 +113,10 @@ trackball.o: trackball.c trackball.h $(CC) -c -I$(INCDIR) $(CFLAGS) trackball.c +extfuncs.h: $(TOP)/progs/util/extfuncs.h + cp $< . + + reflect: reflect.o showbuffer.o readtex.o $(CC) -I$(INCDIR) $(CFLAGS) reflect.o showbuffer.o readtex.o $(APP_LIB_DEPS) -o $@ @@ -141,6 +145,9 @@ engine.o: engine.c trackball.h $(CC) -c -I$(INCDIR) $(CFLAGS) engine.c +fslight.c: extfuncs.h + + clean: -rm -f $(PROGS) -rm -f *.o *~ diff --git a/progs/demos/fslight.c b/progs/demos/fslight.c index 1c016cc75e..e181648583 100644 --- a/progs/demos/fslight.c +++ b/progs/demos/fslight.c @@ -20,6 +20,10 @@ #include #include #include +#include "extfuncs.h" + +static char *FragProgFile = NULL; +static char *VertProgFile = NULL; static GLfloat diffuse[4] = { 0.5f, 0.5f, 1.0f, 1.0f }; static GLfloat specular[4] = { 0.8f, 0.8f, 0.8f, 1.0f }; @@ -35,7 +39,7 @@ static GLint uDiffuse; static GLint uSpecular; static GLint win = 0; -static GLboolean anim = GL_TRUE; +static GLboolean anim = GL_FALSE; static GLboolean wire = GL_FALSE; static GLboolean pixelLight = GL_TRUE; @@ -44,23 +48,6 @@ static GLint frames = 0; static GLfloat xRot = 0.0f, yRot = 0.0f; -static PFNGLCREATESHADERPROC glCreateShader_func = NULL; -static PFNGLSHADERSOURCEPROC glShaderSource_func = NULL; -static PFNGLGETSHADERSOURCEPROC glGetShaderSource_func = NULL; -static PFNGLCOMPILESHADERPROC glCompileShader_func = NULL; -static PFNGLCREATEPROGRAMPROC glCreateProgram_func = NULL; -static PFNGLDELETEPROGRAMPROC glDeleteProgram_func = NULL; -static PFNGLDELETESHADERPROC glDeleteShader_func = NULL; -static PFNGLATTACHSHADERPROC glAttachShader_func = NULL; -static PFNGLLINKPROGRAMPROC glLinkProgram_func = NULL; -static PFNGLUSEPROGRAMPROC glUseProgram_func = NULL; -static PFNGLGETUNIFORMLOCATIONPROC glGetUniformLocation_func = NULL; -static PFNGLISPROGRAMPROC glIsProgram_func = NULL; -static PFNGLISSHADERPROC glIsShader_func = NULL; -static PFNGLUNIFORM3FVPROC glUniform3fv_func = NULL; -static PFNGLUNIFORM3FVPROC glUniform4fv_func = NULL; - - static void normalize(GLfloat *dst, const GLfloat *src) @@ -216,6 +203,131 @@ SpecialKey(int key, int x, int y) } +static void +TestFunctions(void) +{ + printf("Error 0x%x at line %d\n", glGetError(), __LINE__); + { + GLfloat pos[3]; + glUniform3fv_func(uLightPos, 1, lightPos); + glGetUniformfv_func(program, uLightPos, pos); + printf("Error 0x%x at line %d\n", glGetError(), __LINE__); + printf("Light pos %g %g %g\n", pos[0], pos[1], pos[2]); + } + + + { + GLfloat m[16], result[16]; + GLint mPos; + int i; + + for (i = 0; i < 16; i++) + m[i] = (float) i; + + mPos = glGetUniformLocation_func(program, "m"); + printf("Error 0x%x at line %d\n", glGetError(), __LINE__); + glUniformMatrix4fv_func(mPos, 1, GL_FALSE, m); + printf("Error 0x%x at line %d\n", glGetError(), __LINE__); + + glGetUniformfv_func(program, mPos, result); + printf("Error 0x%x at line %d\n", glGetError(), __LINE__); + + for (i = 0; i < 16; i++) { + printf("%8g %8g\n", m[i], result[i]); + } + } + + assert(glIsProgram_func(program)); + assert(glIsShader_func(fragShader)); + assert(glIsShader_func(vertShader)); + + /* attached shaders */ + { + GLuint shaders[20]; + GLsizei count; + int i; + glGetAttachedShaders_func(program, 20, &count, shaders); + for (i = 0; i < count; i++) { + printf("Attached: %u\n", shaders[i]); + assert(shaders[i] == fragShader || + shaders[i] == vertShader); + } + } + + { + GLchar log[1000]; + GLsizei len; + glGetShaderInfoLog_func(vertShader, 1000, &len, log); + printf("Vert Shader Info Log: %s\n", log); + glGetShaderInfoLog_func(fragShader, 1000, &len, log); + printf("Frag Shader Info Log: %s\n", log); + glGetProgramInfoLog_func(program, 1000, &len, log); + printf("Program Info Log: %s\n", log); + } +} + + +static void +LoadAndCompileShader(GLuint shader, const char *text) +{ + GLint stat; + + glShaderSource_func(shader, 1, (const GLchar **) &text, NULL); + + glCompileShader_func(shader); + + glGetShaderiv_func(shader, GL_COMPILE_STATUS, &stat); + if (!stat) { + GLchar log[1000]; + GLsizei len; + glGetShaderInfoLog_func(shader, 1000, &len, log); + fprintf(stderr, "Problem compiling shader: %s\n", log); + exit(1); + } +} + + +/** + * Read a shader from a file. + */ +static void +ReadShader(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, "Unable to open shader file %s\n", filename); + exit(1); + } + + n = fread(buffer, 1, max, f); + printf("Read %d bytes from shader file %s\n", n, filename); + if (n > 0) { + buffer[n] = 0; + LoadAndCompileShader(shader, buffer); + } + + fclose(f); + free(buffer); +} + + +static void +CheckLink(GLuint prog) +{ + GLint stat; + glGetProgramiv_func(prog, GL_LINK_STATUS, &stat); + if (!stat) { + GLchar log[1000]; + GLsizei len; + glGetProgramInfoLog_func(prog, 1000, &len, log); + fprintf(stderr, "Linker error:\n%s\n", log); + } +} + + static void Init(void) { @@ -236,8 +348,6 @@ Init(void) " gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n" " normal = gl_NormalMatrix * gl_Normal;\n" "}\n"; - - const char *version; version = (const char *) glGetString(GL_VERSION); @@ -246,40 +356,33 @@ Init(void) /*exit(1);*/ } - - glCreateShader_func = (PFNGLCREATESHADERPROC) glutGetProcAddress("glCreateShader"); - glDeleteShader_func = (PFNGLDELETESHADERPROC) glutGetProcAddress("glDeleteShader"); - glDeleteProgram_func = (PFNGLDELETEPROGRAMPROC) glutGetProcAddress("glDeleteProgram"); - glShaderSource_func = (PFNGLSHADERSOURCEPROC) glutGetProcAddress("glShaderSource"); - glGetShaderSource_func = (PFNGLGETSHADERSOURCEPROC) glutGetProcAddress("glGetShaderSource"); - glCompileShader_func = (PFNGLCOMPILESHADERPROC) glutGetProcAddress("glCompileShader"); - glCreateProgram_func = (PFNGLCREATEPROGRAMPROC) glutGetProcAddress("glCreateProgram"); - glAttachShader_func = (PFNGLATTACHSHADERPROC) glutGetProcAddress("glAttachShader"); - glLinkProgram_func = (PFNGLLINKPROGRAMPROC) glutGetProcAddress("glLinkProgram"); - glUseProgram_func = (PFNGLUSEPROGRAMPROC) glutGetProcAddress("glUseProgram"); - glGetUniformLocation_func = (PFNGLGETUNIFORMLOCATIONPROC) glutGetProcAddress("glGetUniformLocation"); - glIsProgram_func = (PFNGLISPROGRAMPROC) glutGetProcAddress("glIsProgram"); - glIsShader_func = (PFNGLISSHADERPROC) glutGetProcAddress("glIsShader"); - glUniform3fv_func = (PFNGLUNIFORM3FVPROC) glutGetProcAddress("glUniform3fv"); - glUniform4fv_func = (PFNGLUNIFORM3FVPROC) glutGetProcAddress("glUniform4fv"); + GetExtensionFuncs(); fragShader = glCreateShader_func(GL_FRAGMENT_SHADER); - glShaderSource_func(fragShader, 1, &fragShaderText, NULL); - glCompileShader_func(fragShader); + if (FragProgFile) + ReadShader(fragShader, FragProgFile); + else + LoadAndCompileShader(fragShader, fragShaderText); + vertShader = glCreateShader_func(GL_VERTEX_SHADER); - glShaderSource_func(vertShader, 1, &vertShaderText, NULL); - glCompileShader_func(vertShader); + if (VertProgFile) + ReadShader(vertShader, VertProgFile); + else + LoadAndCompileShader(vertShader, vertShaderText); program = glCreateProgram_func(); glAttachShader_func(program, fragShader); glAttachShader_func(program, vertShader); glLinkProgram_func(program); + CheckLink(program); glUseProgram_func(program); uLightPos = glGetUniformLocation_func(program, "lightPos"); uDiffuse = glGetUniformLocation_func(program, "diffuse"); uSpecular = glGetUniformLocation_func(program, "specular"); + printf("LightPos %d DiffusePos %d SpecularPos %d\n", + uLightPos, uDiffuse, uSpecular); glUniform4fv_func(uDiffuse, 1, diffuse); glUniform4fv_func(uSpecular, 1, specular); @@ -296,7 +399,7 @@ Init(void) printf("Press p to toggle between per-pixel and per-vertex lighting\n"); /* test glGetShaderSource() */ - { + if (0) { GLsizei len = strlen(fragShaderText) + 1; GLsizei lenOut; GLchar *src =(GLchar *) malloc(len * sizeof(GLchar)); @@ -310,6 +413,26 @@ Init(void) assert(glIsProgram_func(program)); assert(glIsShader_func(fragShader)); assert(glIsShader_func(vertShader)); + + glColor3f(1, 0, 0); +#if 0 + TestFunctions(); +#endif +} + + +static void +ParseOptions(int argc, char *argv[]) +{ + int i; + for (i = 1; i < argc; i++) { + if (strcmp(argv[i], "-fs") == 0) { + FragProgFile = argv[i+1]; + } + else if (strcmp(argv[i], "-vs") == 0) { + VertProgFile = argv[i+1]; + } + } } @@ -318,7 +441,7 @@ main(int argc, char *argv[]) { glutInit(&argc, argv); glutInitWindowPosition( 0, 0); - glutInitWindowSize(200, 200); + glutInitWindowSize(100, 100); glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH); win = glutCreateWindow(argv[0]); glutReshapeFunc(Reshape); @@ -327,6 +450,7 @@ main(int argc, char *argv[]) glutDisplayFunc(Redisplay); if (anim) glutIdleFunc(Idle); + ParseOptions(argc, argv); Init(); glutMainLoop(); return 0; -- cgit v1.2.3