| 1 | /* |
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| 2 | * ====================================================================== |
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| 3 | * AUTHOR: Wei Qiao <qiaow@purdue.edu> |
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| 4 | * Purdue Rendering and Perceptualization Lab (PURPL) |
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| 5 | * |
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| 6 | * Copyright (c) 2004-2006 Purdue Research Foundation |
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| 7 | * |
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| 8 | * See the file "license.terms" for information on usage and |
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| 9 | * redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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| 10 | * ====================================================================== |
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| 11 | */ |
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| 12 | |
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| 13 | |
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| 14 | //system wide global or static functions |
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| 15 | |
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| 16 | #ifndef _GLOBAL_H_ |
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| 17 | #define _GLOBAL_H_ |
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| 18 | |
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| 19 | #include <GL/glew.h> |
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| 20 | #include <Cg/cgGL.h> |
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| 21 | |
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| 22 | |
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| 23 | #define CHECK_FRAMEBUFFER_STATUS() \ |
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| 24 | { \ |
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| 25 | GLenum status; \ |
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| 26 | status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT); \ |
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| 27 | switch(status) { \ |
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| 28 | case GL_FRAMEBUFFER_COMPLETE_EXT: \ |
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| 29 | break; \ |
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| 30 | case GL_FRAMEBUFFER_UNSUPPORTED_EXT: \ |
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| 31 | /* choose different formats */ \ |
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| 32 | break; \ |
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| 33 | default: \ |
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| 34 | /* programming error; will fail on all hardware */ \ |
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| 35 | fprintf(stderr, "programming error\n"); \ |
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| 36 | assert(0); \ |
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| 37 | } \ |
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| 38 | } |
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| 39 | |
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| 40 | |
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| 41 | static CGprogram loadProgram(CGcontext context, CGprofile profile, CGenum program_type, char *filename) |
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| 42 | { |
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| 43 | CGprogram program = cgCreateProgramFromFile(context, program_type, filename, profile, NULL, NULL); |
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| 44 | cgGLLoadProgram(program); |
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| 45 | return program; |
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| 46 | } |
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| 47 | |
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| 48 | static void draw_quad(int w, int h, int tw, int th) |
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| 49 | { |
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| 50 | glBegin(GL_QUADS); |
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| 51 | glTexCoord2f(0, 0); glVertex2f(0, 0); |
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| 52 | glTexCoord2f((float)tw, 0); glVertex2f((float)w, 0); |
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| 53 | glTexCoord2f((float)tw, (float)th); glVertex2f((float)w, (float) h); |
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| 54 | glTexCoord2f(0, (float)th); glVertex2f(0, (float) h); |
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| 55 | glEnd(); |
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| 56 | } |
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| 57 | |
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| 58 | |
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| 59 | //query opengl information |
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| 60 | static void system_info(){ |
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| 61 | fprintf(stderr, "-----------------------------------------------------------\n"); |
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| 62 | fprintf(stderr, "OpenGL driver: %s %s\n", glGetString(GL_VENDOR), glGetString(GL_VERSION)); |
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| 63 | fprintf(stderr, "Graphics hardware: %s\n", glGetString(GL_RENDERER)); |
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| 64 | fprintf(stderr, "-----------------------------------------------------------\n"); |
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| 65 | } |
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| 66 | |
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| 67 | |
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| 68 | #endif |
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