#include <stdio.h>
#include <stdlib.h>
#include <math.h>
+#include <GL/glew.h>
#include <GL/gl.h>
#include <GL/glut.h>
#include <GL/glext.h>
#include "extfuncs.h"
+#include "shaderutil.h"
-static char *FragProgFile = "CH18-mandel.frag.txt";
-static char *VertProgFile = "CH18-mandel.vert.txt";
+static char *FragProgFile = "CH18-mandel.frag";
+static char *VertProgFile = "CH18-mandel.vert";
/* program/shader objects */
static GLuint fragShader;
static GLuint program;
-struct uniform_info {
- const char *name;
- GLuint size;
- GLint location;
- GLfloat value[4];
-};
-
static struct uniform_info Uniforms[] = {
/* vert */
- { "LightPosition", 3, -1, { 0.1, 0.1, 9.0, 0} },
- { "SpecularContribution", 1, -1, { 0.5, 0, 0, 0 } },
- { "DiffuseContribution", 1, -1, { 0.5, 0, 0, 0 } },
- { "Shininess", 1, -1, { 20.0, 0, 0, 0 } },
+ { "LightPosition", 3, GL_FLOAT, { 0.1, 0.1, 9.0, 0}, -1 },
+ { "SpecularContribution", 1, GL_FLOAT, { 0.5, 0, 0, 0 }, -1 },
+ { "DiffuseContribution", 1, GL_FLOAT, { 0.5, 0, 0, 0 }, -1 },
+ { "Shininess", 1, GL_FLOAT, { 20.0, 0, 0, 0 }, -1 },
/* frag */
- { "MaxIterations", 1, -1, { 12, 0, 0, 0 } },
- { "Zoom", 1, -1, { 0.125, 0, 0, 0 } },
- { "Xcenter", 1, -1, { -1.5, 0, 0, 0 } },
- { "Ycenter", 1, -1, { .005, 0, 0, 0 } },
- { "InnerColor", 3, -1, { 1, 0, 0, 0 } },
- { "OuterColor1", 3, -1, { 0, 1, 0, 0 } },
- { "OuterColor2", 3, -1, { 0, 0, 1, 0 } },
- { NULL, 0, 0, { 0, 0, 0, 0 } }
+ { "MaxIterations", 1, GL_FLOAT, { 12, 0, 0, 0 }, -1 },
+ { "Zoom", 1, GL_FLOAT, { 0.125, 0, 0, 0 }, -1 },
+ { "Xcenter", 1, GL_FLOAT, { -1.5, 0, 0, 0 }, -1 },
+ { "Ycenter", 1, GL_FLOAT, { .005, 0, 0, 0 }, -1 },
+ { "InnerColor", 3, GL_FLOAT, { 1, 0, 0, 0 }, -1 },
+ { "OuterColor1", 3, GL_FLOAT, { 0, 1, 0, 0 }, -1 },
+ { "OuterColor2", 3, GL_FLOAT, { 0, 0, 1, 0 }, -1 },
+ END_OF_UNIFORMS
};
static GLint win = 0;
glPopMatrix();
- glFinish();
- glFlush();
glutSwapBuffers();
}
}
-
-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, "mandelbrot: problem compiling shader: %s\n", log);
- exit(1);
- }
- else {
- printf("Shader compiled OK\n");
- }
-}
-
-
-/**
- * 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, "mandelbrot: Unable to open shader file %s\n", filename);
- exit(1);
- }
-
- n = fread(buffer, 1, max, f);
- printf("mandelbrot: 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);
- }
- else {
- fprintf(stderr, "Link success!\n");
- }
-}
-
-
static void
Init(void)
{
- const char *version;
- GLint i;
-
- version = (const char *) glGetString(GL_VERSION);
- if (version[0] != '2' || version[1] != '.') {
- printf("Warning: this program expects OpenGL 2.0\n");
- /*exit(1);*/
- }
+ if (!ShadersSupported())
+ exit(1);
GetExtensionFuncs();
- vertShader = glCreateShader_func(GL_VERTEX_SHADER);
- ReadShader(vertShader, VertProgFile);
-
- fragShader = glCreateShader_func(GL_FRAGMENT_SHADER);
- ReadShader(fragShader, FragProgFile);
+ vertShader = CompileShaderFile(GL_VERTEX_SHADER, VertProgFile);
+ fragShader = CompileShaderFile(GL_FRAGMENT_SHADER, FragProgFile);
+ program = LinkShaders(vertShader, fragShader);
- program = glCreateProgram_func();
- glAttachShader_func(program, fragShader);
- glAttachShader_func(program, vertShader);
- glLinkProgram_func(program);
- CheckLink(program);
glUseProgram_func(program);
- for (i = 0; Uniforms[i].name; i++) {
- Uniforms[i].location
- = glGetUniformLocation_func(program, Uniforms[i].name);
- printf("Uniform %s location: %d\n", Uniforms[i].name,
- Uniforms[i].location);
- switch (Uniforms[i].size) {
- case 1:
- glUniform1fv_func(Uniforms[i].location, 1, Uniforms[i].value);
- break;
- case 2:
- glUniform2fv_func(Uniforms[i].location, 1, Uniforms[i].value);
- break;
- case 3:
- glUniform3fv_func(Uniforms[i].location, 1, Uniforms[i].value);
- break;
- case 4:
- glUniform4fv_func(Uniforms[i].location, 1, Uniforms[i].value);
- break;
- default:
- abort();
- }
- }
+ InitUniforms(program, Uniforms);
uZoom = glGetUniformLocation_func(program, "Zoom");
uXcenter = glGetUniformLocation_func(program, "Xcenter");
glutInitWindowSize(400, 400);
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
win = glutCreateWindow(argv[0]);
+ glewInit();
glutReshapeFunc(Reshape);
glutKeyboardFunc(Key);
glutSpecialFunc(SpecialKey);
projects / mesa.git / blobdiff