From ae99e4c67ebc3adb0b71e427723f34085801c3ac Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Thu, 13 Aug 2009 12:52:13 -0600 Subject: [PATCH] progs/glsl: new shtest program, a simple shader test harness app This commit includes some sample config files (*.shtest) --- progs/glsl/Makefile | 10 +- progs/glsl/brick.shtest | 8 + progs/glsl/mandelbrot.shtest | 14 ++ progs/glsl/shtest.c | 562 +++++++++++++++++++++++++++++++++++++++++++ progs/glsl/toyball.shtest | 17 ++ 5 files changed, 609 insertions(+), 2 deletions(-) create mode 100644 progs/glsl/brick.shtest create mode 100644 progs/glsl/mandelbrot.shtest create mode 100644 progs/glsl/shtest.c create mode 100644 progs/glsl/toyball.shtest diff --git a/progs/glsl/Makefile b/progs/glsl/Makefile index eedd866..bbe08c4 100644 --- a/progs/glsl/Makefile +++ b/progs/glsl/Makefile @@ -33,6 +33,7 @@ DEMO_SOURCES = \ points.c \ samplers.c \ shadow_sampler.c \ + shtest.c \ skinning.c \ texaaline.c \ texdemo1.c \ @@ -198,9 +199,14 @@ shadow_sampler.o: $(UTIL_HEADERS) shadow_sampler: shadow_sampler.o $(UTIL_OBJS) -skinning.o: $(UTIL_HEADERS) +shtest.o: $(UTIL_HEADERS) -skinning: skinning.o $(UTIL_OBJS) +shtest: shtest.o $(UTIL_OBJS) + + +shtest.o: $(UTIL_HEADERS) + +shtest: shtest.o $(UTIL_OBJS) texaaline.o: $(UTIL_HEADERS) diff --git a/progs/glsl/brick.shtest b/progs/glsl/brick.shtest new file mode 100644 index 0000000..c806a0f --- /dev/null +++ b/progs/glsl/brick.shtest @@ -0,0 +1,8 @@ +vs CH06-brick.vert +fs CH06-brick.frag +uniform LightPosition 0.1 0.1 9.0 +uniform BrickColor 0.8 0.2 0.2 +uniform MortarColor 0.6 0.6 0.6 +uniform BrickSize 1.0 0.3 +uniform BrickPct 0.9 0.8 + diff --git a/progs/glsl/mandelbrot.shtest b/progs/glsl/mandelbrot.shtest new file mode 100644 index 0000000..f5cca22 --- /dev/null +++ b/progs/glsl/mandelbrot.shtest @@ -0,0 +1,14 @@ +vs CH18-mandel.vert +fs CH18-mandel.frag +uniform LightPosition 0.1 0.1 9.0 +uniform SpecularContribution 0.5 +uniform DiffuseContribution 0.5 +uniform Shininess 20.0 +uniform Iterations 12 +uniform Zoom 0.125 +uniform Xcenter -1.5 +uniform Ycenter .005 +uniform InnerColor 1 0 0 +uniform OuterColor1 0 1 0 +uniform OuterColor2 0 0 1 + diff --git a/progs/glsl/shtest.c b/progs/glsl/shtest.c new file mode 100644 index 0000000..7eb7202 --- /dev/null +++ b/progs/glsl/shtest.c @@ -0,0 +1,562 @@ +/* + * Simple shader test harness. + * Brian Paul + * 13 Aug 2009 + * + * Usage: + * shtest --vs vertShaderFile --fs fragShaderFile + * + * In this case the given vertex/frag shaders are read and compiled. + * Random values are assigned to the uniforms. + * + * or: + * shtest configFile + * + * In this case a config file is read that specifies the file names + * of the shaders plus initial values for uniforms. + * + * Example config file: + * + * vs shader.vert + * fs shader.frag + * uniform pi 3.14159 + * uniform v1 1.0 0.5 0.2 0.3 + * + */ + + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "shaderutil.h" + + +typedef enum +{ + SPHERE, + CUBE, + NUM_SHAPES +} shape; + + +static char *FragShaderFile = NULL; +static char *VertShaderFile = NULL; +static char *ConfigFile = NULL; + +/* program/shader objects */ +static GLuint fragShader; +static GLuint vertShader; +static GLuint Program; + + +#define MAX_UNIFORMS 100 +static struct uniform_info Uniforms[MAX_UNIFORMS]; +static GLuint NumUniforms = 0; + + +#define MAX_ATTRIBS 100 +static struct attrib_info Attribs[MAX_ATTRIBS]; +static GLuint NumAttribs = 0; + + +/** + * Config file info. + */ +struct config_file +{ + struct name_value + { + char name[100]; + float value[4]; + int type; + } uniforms[100]; + + int num_uniforms; +}; + + +static GLint win = 0; +static GLboolean Anim = GL_FALSE; +static GLfloat TexRot = 0.0; +static GLfloat xRot = 0.0f, yRot = 0.0f, zRot = 0.0f; +static shape Object = SPHERE; + + +static float +RandomFloat(float min, float max) +{ + int k = rand() % 10000; + float x = min + (max - min) * k / 10000.0; + return x; +} + + +/** Set new random values for uniforms */ +static void +RandomUniformValues(void) +{ + GLuint i; + for (i = 0; i < NumUniforms; i++) { + if (Uniforms[i].type == GL_FLOAT) { + Uniforms[i].value[0] = RandomFloat(0.0, 1.0); + } + else { + Uniforms[i].value[0] = RandomFloat(-1.0, 2.0); + Uniforms[i].value[1] = RandomFloat(-1.0, 2.0); + Uniforms[i].value[2] = RandomFloat(-1.0, 2.0); + Uniforms[i].value[3] = RandomFloat(-1.0, 2.0); + } + } +} + + +static void +Idle(void) +{ + yRot += 2.0; + if (yRot > 360.0) + yRot -= 360.0; + glutPostRedisplay(); +} + + + +static void +SquareVertex(GLfloat s, GLfloat t, GLfloat size) +{ + GLfloat x = -size + s * 2.0 * size; + GLfloat y = -size + t * 2.0 * size; + glTexCoord2f(s, t); + glVertex2f(x, y); +} + + +/* + * Draw a square, specifying normal and tangent vectors. + */ +static void +Square(GLfloat size) +{ + GLint tangentAttrib = 1; + glNormal3f(0, 0, 1); + glVertexAttrib3f(tangentAttrib, 1, 0, 0); + glBegin(GL_POLYGON); +#if 0 + SquareVertex(0, 0, size); + SquareVertex(1, 0, size); + SquareVertex(1, 1, size); + SquareVertex(0, 1, size); +#else + glTexCoord2f(0, 0); glVertex2f(-size, -size); + glTexCoord2f(1, 0); glVertex2f( size, -size); + glTexCoord2f(1, 1); glVertex2f( size, size); + glTexCoord2f(0, 1); glVertex2f(-size, size); +#endif + glEnd(); +} + + +static void +Cube(GLfloat size) +{ + /* +X */ + glPushMatrix(); + glRotatef(90, 0, 1, 0); + glTranslatef(0, 0, size); + Square(size); + glPopMatrix(); + + /* -X */ + glPushMatrix(); + glRotatef(-90, 0, 1, 0); + glTranslatef(0, 0, size); + Square(size); + glPopMatrix(); + + /* +Y */ + glPushMatrix(); + glRotatef(90, 1, 0, 0); + glTranslatef(0, 0, size); + Square(size); + glPopMatrix(); + + /* -Y */ + glPushMatrix(); + glRotatef(-90, 1, 0, 0); + glTranslatef(0, 0, size); + Square(size); + glPopMatrix(); + + + /* +Z */ + glPushMatrix(); + glTranslatef(0, 0, size); + Square(size); + glPopMatrix(); + + /* -Z */ + glPushMatrix(); + glRotatef(180, 0, 1, 0); + glTranslatef(0, 0, size); + Square(size); + glPopMatrix(); +} + + +static void +Sphere(GLfloat radius, GLint slices, GLint stacks) +{ + static GLUquadricObj *q = NULL; + + if (!q) { + q = gluNewQuadric(); + gluQuadricDrawStyle(q, GLU_FILL); + gluQuadricNormals(q, GLU_SMOOTH); + gluQuadricTexture(q, GL_TRUE); + } + + gluSphere(q, radius, slices, stacks); +} + + +static void +Redisplay(void) +{ + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + + glPushMatrix(); + glRotatef(xRot, 1.0f, 0.0f, 0.0f); + glRotatef(yRot, 0.0f, 1.0f, 0.0f); + glRotatef(zRot, 0.0f, 0.0f, 1.0f); + + glMatrixMode(GL_TEXTURE); + glLoadIdentity(); + glRotatef(TexRot, 0.0f, 1.0f, 0.0f); + glMatrixMode(GL_MODELVIEW); + + if (Object == SPHERE) { + Sphere(2.0, 20, 10); + } + else if (Object == CUBE) { + Cube(2.0); + } + + glPopMatrix(); + + glutSwapBuffers(); +} + + +static void +Reshape(int width, int height) +{ + glViewport(0, 0, width, height); + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + glFrustum(-1.0, 1.0, -1.0, 1.0, 5.0, 25.0); + glMatrixMode(GL_MODELVIEW); + glLoadIdentity(); + glTranslatef(0.0f, 0.0f, -15.0f); +} + + +static void +CleanUp(void) +{ + glDeleteShader(fragShader); + glDeleteShader(vertShader); + glDeleteProgram(Program); + glutDestroyWindow(win); +} + + +static void +Key(unsigned char key, int x, int y) +{ + const GLfloat step = 2.0; + (void) x; + (void) y; + + switch(key) { + case 'a': + Anim = !Anim; + if (Anim) + glutIdleFunc(Idle); + else + glutIdleFunc(NULL); + break; + case 'z': + zRot += step; + break; + case 'Z': + zRot -= step; + break; + case 'o': + Object = (Object + 1) % NUM_SHAPES; + break; + case 'r': + RandomUniformValues(); + SetUniformValues(Program, Uniforms); + PrintUniforms(Uniforms); + break; + case 27: + CleanUp(); + exit(0); + break; + } + glutPostRedisplay(); +} + + +static void +SpecialKey(int key, int x, int y) +{ + const GLfloat step = 2.0; + + (void) x; + (void) y; + + switch(key) { + case GLUT_KEY_UP: + xRot += step; + break; + case GLUT_KEY_DOWN: + xRot -= step; + break; + case GLUT_KEY_LEFT: + yRot -= step; + break; + case GLUT_KEY_RIGHT: + yRot += step; + break; + } + glutPostRedisplay(); +} + + +static void +InitUniforms(const struct config_file *conf, + struct uniform_info uniforms[]) +{ + int i; + + for (i = 0; i < conf->num_uniforms; i++) { + int j; + for (j = 0; uniforms[j].name; j++) { + if (strcmp(uniforms[j].name, conf->uniforms[i].name) == 0) { + uniforms[j].type = conf->uniforms[i].type; + uniforms[j].value[0] = conf->uniforms[i].value[0]; + uniforms[j].value[1] = conf->uniforms[i].value[1]; + uniforms[j].value[2] = conf->uniforms[i].value[2]; + uniforms[j].value[3] = conf->uniforms[i].value[3]; + } + } + } +} + + +/** + * Read a config file. + */ +static void +ReadConfigFile(const char *filename, struct config_file *conf) +{ + char line[1000]; + FILE *f; + + f = fopen(filename, "r"); + if (!f) { + fprintf(stderr, "Unable to open config file %s\n", filename); + exit(1); + } + + conf->num_uniforms = 0; + + /* ugly but functional parser */ + while (!feof(f)) { + fgets(line, sizeof(line), f); + if (line[0]) { + if (strncmp(line, "vs ", 3) == 0) { + VertShaderFile = strdup(line + 3); + VertShaderFile[strlen(VertShaderFile) - 1] = 0; + } + else if (strncmp(line, "fs ", 3) == 0) { + FragShaderFile = strdup(line + 3); + FragShaderFile[strlen(FragShaderFile) - 1] = 0; + } + else if (strncmp(line, "uniform ", 8) == 0) { + char name[1000]; + int k; + float v1, v2, v3, v4; + GLenum type; + + k = sscanf(line + 8, "%s %f %f %f %f", name, &v1, &v2, &v3, &v4); + + switch (k) { + case 1: + type = GL_NONE; + abort(); + break; + case 2: + type = GL_FLOAT; + break; + case 3: + type = GL_FLOAT_VEC2; + break; + case 4: + type = GL_FLOAT_VEC3; + break; + case 5: + type = GL_FLOAT_VEC4; + break; + } + + strcpy(conf->uniforms[conf->num_uniforms].name, name); + conf->uniforms[conf->num_uniforms].value[0] = v1; + conf->uniforms[conf->num_uniforms].value[1] = v2; + conf->uniforms[conf->num_uniforms].value[2] = v3; + conf->uniforms[conf->num_uniforms].value[3] = v4; + conf->uniforms[conf->num_uniforms].type = type; + conf->num_uniforms++; + } + else { + if (strlen(line) > 1) { + fprintf(stderr, "syntax error in: %s\n", line); + break; + } + } + } + } + + fclose(f); +} + + +static void +Init(void) +{ + struct config_file config; + memset(&config, 0, sizeof(config)); + + if (ConfigFile) + ReadConfigFile(ConfigFile, &config); + + if (!VertShaderFile) { + fprintf(stderr, "Error: no vertex shader\n"); + exit(1); + } + + if (!FragShaderFile) { + fprintf(stderr, "Error: no fragment shader\n"); + exit(1); + } + + if (!ShadersSupported()) + exit(1); + + vertShader = CompileShaderFile(GL_VERTEX_SHADER, VertShaderFile); + fragShader = CompileShaderFile(GL_FRAGMENT_SHADER, FragShaderFile); + Program = LinkShaders(vertShader, fragShader); + + glUseProgram(Program); + + NumUniforms = GetUniforms(Program, Uniforms); + if (config.num_uniforms) { + InitUniforms(&config, Uniforms); + } + else { + RandomUniformValues(); + } + SetUniformValues(Program, Uniforms); + PrintUniforms(Uniforms); + + NumAttribs = GetAttribs(Program, Attribs); + PrintAttribs(Attribs); + + //assert(glGetError() == 0); + + glClearColor(0.4f, 0.4f, 0.8f, 0.0f); + + glEnable(GL_DEPTH_TEST); + + glColor3f(1, 0, 0); +} + + +static void +Keys(void) +{ + printf("Keyboard:\n"); + printf(" a Animation toggle\n"); + printf(" r Randomize uniform values\n"); + printf(" o Change object\n"); + printf(" arrows Rotate object\n"); + printf(" ESC Exit\n"); +} + + +static void +Usage(void) +{ + printf("Usage:\n"); + printf(" shtest config.shtest\n"); + printf(" Run w/ given config file.\n"); + printf(" shtest --vs vertShader --fs fragShader\n"); + printf(" Load/compile given shaders.\n"); +} + + +static void +ParseOptions(int argc, char *argv[]) +{ + int i; + + if (argc == 1) { + Usage(); + exit(1); + } + + for (i = 1; i < argc; i++) { + if (strcmp(argv[i], "--fs") == 0) { + FragShaderFile = argv[i+1]; + i++; + } + else if (strcmp(argv[i], "--vs") == 0) { + VertShaderFile = argv[i+1]; + i++; + } + else { + /* assume the arg is a config file */ + ConfigFile = argv[i]; + break; + } + } +} + + +int +main(int argc, char *argv[]) +{ + glutInit(&argc, argv); + glutInitWindowPosition( 0, 0); + glutInitWindowSize(400, 400); + glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH); + win = glutCreateWindow(argv[0]); + glewInit(); + glutReshapeFunc(Reshape); + glutKeyboardFunc(Key); + glutSpecialFunc(SpecialKey); + glutDisplayFunc(Redisplay); + ParseOptions(argc, argv); + Init(); + Keys(); + glutMainLoop(); + return 0; +} + diff --git a/progs/glsl/toyball.shtest b/progs/glsl/toyball.shtest new file mode 100644 index 0000000..2852ab0 --- /dev/null +++ b/progs/glsl/toyball.shtest @@ -0,0 +1,17 @@ +vs CH11-toyball.vert +fs CH11-toyball.frag +uniform LightDir 0.57737 0.57735 0.57735 0.0 +uniform HVector 0.32506 0.32506 0.88808 0.0 +uniform BallCenter 0.0 0.0 0.0 1.0 +uniform SpecularColor 0.4 0.4 0.4 60.0 +uniform Red 0.6 0.0 0.0 1.0 +uniform Blue 0.0 0.3 0.6 1.0 +uniform Yellow 0.6 0.5 0.0 1.0 +uniform HalfSpace0 1.0 0.0 0.0 0.2 +uniform HalfSpace1 .309016994 0.951056516 0.0 0.2 +uniform HalfSpace2 -0.809016994 0.587785252 0.0 0.2 +uniform HalfSpace3 -0.809016994 -0.587785252 0.0 0.2 +uniform HalfSpace4 .309116994 -0.951056516 0.0 0.2 +uniform InOrOutInit -3.0 +uniform StripeWidth 0.3 +uniform FWidth .005 -- 2.7.4