Replace duplicated code with new shaderutil.c functions
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@@ -14,6 +14,7 @@
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#include <GL/glut.h>
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#include <GL/glext.h>
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#include "extfuncs.h"
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#include "shaderutil.h"
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static GLuint FragShader;
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@@ -181,40 +182,6 @@ SpecialKey(int key, int x, int y)
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}
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static void
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LoadAndCompileShader(GLuint shader, const char *text)
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{
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GLint stat;
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glShaderSource_func(shader, 1, (const GLchar **) &text, NULL);
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glCompileShader_func(shader);
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glGetShaderiv_func(shader, GL_COMPILE_STATUS, &stat);
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if (!stat) {
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GLchar log[1000];
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GLsizei len;
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glGetShaderInfoLog_func(shader, 1000, &len, log);
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fprintf(stderr, "fslight: problem compiling shader:\n%s\n", log);
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exit(1);
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}
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}
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static void
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CheckLink(GLuint prog)
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{
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GLint stat;
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glGetProgramiv_func(prog, GL_LINK_STATUS, &stat);
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if (!stat) {
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GLchar log[1000];
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GLsizei len;
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glGetProgramInfoLog_func(prog, 1000, &len, log);
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fprintf(stderr, "Linker error:\n%s\n", log);
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}
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}
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static void
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Init(void)
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{
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@@ -254,28 +221,16 @@ Init(void)
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" gl_TexCoord[0] = gl_MultiTexCoord0; \n"
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" gl_FrontColor = gl_Color; \n"
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"}\n";
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const char *version;
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version = (const char *) glGetString(GL_VERSION);
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if (version[0] != '2' || version[1] != '.') {
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printf("This program requires OpenGL 2.x, found %s\n", version);
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if (!ShadersSupported())
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exit(1);
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}
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printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
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GetExtensionFuncs();
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FragShader = glCreateShader_func(GL_FRAGMENT_SHADER);
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LoadAndCompileShader(FragShader, fragShaderText);
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VertShader = CompileShaderText(GL_VERTEX_SHADER, vertShaderText);
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FragShader = CompileShaderText(GL_FRAGMENT_SHADER, fragShaderText);
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Program = LinkShaders(VertShader, FragShader);
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VertShader = glCreateShader_func(GL_VERTEX_SHADER);
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LoadAndCompileShader(VertShader, vertShaderText);
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Program = glCreateProgram_func();
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glAttachShader_func(Program, FragShader);
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glAttachShader_func(Program, VertShader);
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glLinkProgram_func(Program);
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CheckLink(Program);
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glUseProgram_func(Program);
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uViewportInv = glGetUniformLocation_func(Program, "viewportInv");
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