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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * Demo of off-screen Mesa rendering |
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| 3 | * |
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| 4 | * See Mesa/include/GL/osmesa.h for documentation of the OSMesa functions. |
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| 5 | * |
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| 6 | * If you want to render BIG images you'll probably have to increase |
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| 7 | * MAX_WIDTH and MAX_Height in src/config.h. |
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| 8 | * |
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| 9 | * This program is in the public domain. |
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| 10 | * |
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| 11 | * Brian Paul |
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| 12 | * |
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| 13 | * PPM output provided by Joerg Schmalzl. |
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| 14 | * ASCII PPM output added by Brian Paul. |
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| 15 | * |
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| 16 | * Usage: osdemo [filename] |
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| 17 | */ |
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| 18 | |||
| 19 | |||
| 20 | #include |
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| 21 | #include |
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| 22 | #include |
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| 23 | #include |
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| 24 | #include |
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| 25 | #define GL_GLEXT_PROTOTYPES |
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| 26 | #include "GL/osmesa.h" |
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| 27 | #include |
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| 28 | #include "GL/glu.h" |
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| 29 | #include "shaderutil.h" |
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| 30 | #include |
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| 31 | |||
| 32 | int _CRT_MT=0; |
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| 33 | |||
| 34 | static int Width = 500; |
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| 35 | static int Height = 400; |
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| 36 | |||
| 37 | int check_events(); |
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| 38 | |||
| 39 | GLfloat view_rotx = 20.0, view_roty = 30.0, view_rotz = 0.0; |
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| 40 | GLfloat angle = 0.0; |
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| 41 | |||
| 42 | GLboolean animate = GL_TRUE; /* Animation */ |
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| 43 | GLfloat eyesep = 5.0; /* Eye separation. */ |
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| 44 | GLfloat fix_point = 40.0; /* Fixation point distance. */ |
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| 45 | GLfloat left, right, asp; /* Stereo frustum params. */ |
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| 46 | |||
| 47 | void Init( void ); |
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| 48 | void Reshape( int width, int height ); |
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| 49 | void Draw( void ); |
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| 50 | void Idle(); |
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| 51 | void Key(unsigned char key, int x, int y); |
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| 52 | |||
| 53 | |||
| 54 | inline void Blit(void *bitmap, int dst_x, int dst_y, |
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| 55 | int src_x, int src_y, int w, int h, |
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| 56 | int src_w, int src_h, int stride) |
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| 57 | { |
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| 58 | volatile struct blit_call bc; |
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| 59 | |||
| 60 | bc.dstx = dst_x; |
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| 61 | bc.dsty = dst_y; |
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| 62 | bc.w = w; |
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| 63 | bc.h = h; |
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| 64 | bc.srcx = src_x; |
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| 65 | bc.srcy = src_y; |
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| 66 | bc.srcw = src_w; |
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| 67 | bc.srch = src_h; |
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| 68 | bc.stride = stride; |
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| 69 | bc.bitmap = bitmap; |
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| 70 | |||
| 71 | __asm__ __volatile__( |
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| 72 | "int $0x40" |
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| 73 | ::"a"(73),"b"(0),"c"(&bc.dstx)); |
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| 74 | |||
| 75 | }; |
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| 76 | |||
| 77 | |||
| 78 | static inline uint32_t wait_os_event(int time) |
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| 79 | { |
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| 80 | uint32_t val; |
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| 81 | __asm__ __volatile__( |
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| 82 | "int $0x40" |
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| 83 | :"=a"(val) |
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| 84 | :"a"(23),"b"(time)); |
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| 85 | return val; |
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| 86 | }; |
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| 87 | |||
| 88 | |||
| 89 | int main(int argc, char *argv[]) |
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| 90 | { |
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| 91 | OSMesaContext ctx; |
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| 92 | void *buffer; |
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| 93 | char *filename = NULL; |
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| 94 | int ev; |
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| 95 | int repeat=1; |
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| 96 | |||
| 97 | /* Create an RGBA-mode context */ |
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| 98 | /* specify Z, stencil, accum sizes */ |
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| 99 | |||
| 100 | ctx = OSMesaCreateContextExt( OSMESA_RGBA, 16, 0, 0, NULL ); |
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| 101 | if (!ctx) { |
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| 102 | printf("OSMesaCreateContext failed!\n"); |
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| 103 | return 0; |
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| 104 | } |
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| 105 | |||
| 106 | /* Allocate the image buffer */ |
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| 107 | buffer = malloc( Width * Height * 4 * sizeof(GLubyte) ); |
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| 108 | if (!buffer) { |
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| 109 | printf("Alloc image buffer failed!\n"); |
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| 110 | return 0; |
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| 111 | } |
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| 112 | |||
| 113 | // __asm__ __volatile__("int3"); |
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| 114 | |||
| 115 | /* Bind the buffer to the context and make it current */ |
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| 116 | if (!OSMesaMakeCurrent( ctx, buffer, GL_UNSIGNED_BYTE, Width, Height )) { |
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| 117 | printf("OSMesaMakeCurrent failed!\n"); |
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| 118 | return 0; |
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| 119 | } |
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| 120 | |||
| 121 | { |
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| 122 | int z, s, a; |
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| 123 | glGetIntegerv(GL_DEPTH_BITS, &z); |
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| 124 | glGetIntegerv(GL_STENCIL_BITS, &s); |
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| 125 | glGetIntegerv(GL_ACCUM_RED_BITS, &a); |
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| 126 | printf("Depth=%d Stencil=%d Accum=%d\n", z, s, a); |
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| 127 | } |
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| 128 | |||
| 129 | Reshape(Width, Height); |
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| 130 | Init(); |
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| 131 | Draw(); |
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| 132 | |||
| 133 | printf("all done\n"); |
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| 134 | |||
| 135 | DrawWindow(10, 10, Width+9, Height+26, "OpenGL Engine Demo", 0x000000, 0x74); |
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| 136 | Blit(buffer, 5, 22, 0, 0, Width, Height, Width,Height,Width*4); |
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| 137 | |||
| 138 | while(repeat) |
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| 139 | { |
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| 140 | oskey_t key; |
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| 141 | |||
| 142 | ev = wait_os_event(1); |
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| 143 | switch(ev) |
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| 144 | { |
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| 145 | case 1: |
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| 146 | DrawWindow(10, 10, Width+9, Width+26, NULL, 0x000000,0x74); |
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| 147 | Blit(buffer, 5, 22, 0, 0, Width, Height, Width,Height,Width*4); |
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| 148 | continue; |
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| 149 | |||
| 150 | case 2: |
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| 151 | key = get_key(); |
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| 152 | Key(key.code, 0, 0); |
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| 153 | Draw(); |
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| 154 | Blit(buffer, 5, 22, 0, 0, Width, Height, Width,Height,Width*4); |
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| 155 | continue; |
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| 156 | |||
| 157 | case 3: |
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| 158 | if(get_os_button()==1) |
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| 159 | repeat=0; |
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| 160 | continue; |
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| 161 | }; |
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| 162 | Idle(); |
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| 163 | Draw(); |
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| 164 | Blit(buffer, 5, 22, 0, 0, Width, Height, Width,Height,Width*4); |
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| 165 | }; |
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| 166 | |||
| 167 | /* free the image buffer */ |
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| 168 | free( buffer ); |
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| 169 | |||
| 170 | /* destroy the context */ |
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| 171 | OSMesaDestroyContext( ctx ); |
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| 172 | |||
| 173 | return 0; |
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| 174 | } |
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| 175 | |||
| 176 | int atexit(void (*func)(void)) |
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| 177 | { |
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| 178 | return 0; |
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| 179 | }; |
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| 180 |