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 | #include <stdio.h> |
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23 | |
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24 | #define CHECK_FRAMEBUFFER_STATUS() \ |
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25 | { \ |
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26 | GLenum status; \ |
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27 | status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT); \ |
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28 | switch(status) { \ |
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29 | case GL_FRAMEBUFFER_COMPLETE_EXT: \ |
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30 | break; \ |
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31 | case GL_FRAMEBUFFER_UNSUPPORTED_EXT: \ |
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32 | /* choose different formats */ \ |
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33 | break; \ |
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34 | default: \ |
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35 | /* programming error; will fail on all hardware */ \ |
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36 | fprintf(stderr, "programming error\n"); \ |
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37 | assert(0); \ |
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38 | } \ |
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39 | } |
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40 | |
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41 | |
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42 | inline CGprogram |
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43 | loadProgram(CGcontext context, CGprofile profile, CGenum program_type, |
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44 | char *filename) |
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45 | { |
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46 | CGprogram program = cgCreateProgramFromFile(context, program_type, filename, |
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47 | profile, NULL, NULL); |
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48 | cgGLLoadProgram(program); |
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49 | return program; |
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50 | } |
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51 | |
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52 | inline void |
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53 | draw_quad(int w, int h, int tw, int th) |
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54 | { |
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55 | glBegin(GL_QUADS); |
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56 | glTexCoord2f(0, 0); glVertex2f(0, 0); |
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57 | glTexCoord2f((float)tw, 0); glVertex2f((float)w, 0); |
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58 | glTexCoord2f((float)tw, (float)th); glVertex2f((float)w, (float) h); |
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59 | glTexCoord2f(0, (float)th); glVertex2f(0, (float) h); |
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60 | glEnd(); |
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61 | } |
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62 | |
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63 | |
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64 | //query opengl information |
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65 | inline void |
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66 | system_info() |
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67 | { |
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68 | fprintf(stderr, |
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69 | "-----------------------------------------------------------\n"); |
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70 | fprintf(stderr, "OpenGL driver: %s %s\n", glGetString(GL_VENDOR), |
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71 | glGetString(GL_VERSION)); |
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72 | fprintf(stderr, "Graphics hardware: %s\n", glGetString(GL_RENDERER)); |
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73 | fprintf(stderr, |
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74 | "-----------------------------------------------------------\n"); |
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75 | } |
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76 | #endif |
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