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Rev | Author | Line No. | Line |
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5069 | 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 | #include |
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26 | #define GL_GLEXT_PROTOTYPES |
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27 | #include "GL/osmesa.h" |
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28 | #include |
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29 | #include "eglut.h" |
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30 | #include |
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31 | |||
32 | void init(void); |
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33 | void reshape(int width, int height); |
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34 | void draw(void); |
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35 | void keyboard(unsigned char key); |
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36 | |||
37 | extern GLfloat angle; |
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38 | |||
39 | static void idle(void) |
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40 | { |
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41 | static uint32_t t0; |
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42 | uint32_t t, dt; |
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43 | |||
44 | t = get_tick_count(); |
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45 | |||
46 | dt = t - t0; |
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47 | t0 = t; |
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48 | |||
49 | angle += 70.0 * dt / 100; /* 70 degrees per second */ |
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50 | if (angle > 3600.0) |
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51 | angle -= 3600.0; |
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52 | } |
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53 | |||
54 | static int time_now(void) |
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55 | { |
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56 | struct timeval tv; |
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57 | struct timezone tz; |
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58 | (void) gettimeofday(&tv, &tz); |
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59 | return tv.tv_sec * 1000 + tv.tv_usec / 1000; |
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60 | } |
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61 | |||
62 | int main(int argc, char *argv[]) |
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63 | { |
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64 | int Width = 384; |
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65 | int Height = 384; |
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66 | |||
67 | OSMesaContext ctx; |
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68 | void *buffer; |
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69 | char *filename = NULL; |
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70 | int ev; |
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71 | int repeat=1; |
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72 | |||
73 | /* Create an RGBA-mode context */ |
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74 | /* specify Z, stencil, accum sizes */ |
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75 | |||
76 | ctx = OSMesaCreateContextExt( OSMESA_BGRA, 16, 0, 0, NULL ); |
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77 | if (!ctx) { |
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78 | printf("OSMesaCreateContext failed!\n"); |
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79 | return 0; |
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80 | } |
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81 | |||
82 | /* Allocate the image buffer */ |
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83 | buffer = malloc( Width * Height * 4 * sizeof(GLubyte) ); |
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84 | if (!buffer) { |
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85 | printf("Alloc image buffer failed!\n"); |
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86 | return 0; |
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87 | } |
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88 | |||
89 | /* Bind the buffer to the context and make it current */ |
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90 | if (!OSMesaMakeCurrent( ctx, buffer, GL_UNSIGNED_BYTE, Width, Height )) { |
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91 | printf("OSMesaMakeCurrent failed!\n"); |
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92 | return 0; |
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93 | } |
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94 | |||
95 | { |
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96 | int z, s, a; |
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97 | glGetIntegerv(GL_DEPTH_BITS, &z); |
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98 | glGetIntegerv(GL_STENCIL_BITS, &s); |
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99 | glGetIntegerv(GL_ACCUM_RED_BITS, &a); |
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100 | printf("Depth=%d Stencil=%d Accum=%d\n", z, s, a); |
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101 | } |
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102 | |||
103 | reshape(Width, Height); |
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104 | |||
105 | glClearColor( 0, 0, 0, 1); |
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106 | |||
107 | init(); |
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108 | draw(); |
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109 | |||
110 | DrawWindow(10, 10, Width+TYPE_3_BORDER_WIDTH*2, Height+TYPE_3_BORDER_WIDTH+get_skin_height(), |
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111 | "OpenGL Engine Demo", 0x000000, 0x74); |
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112 | Blit(buffer, TYPE_3_BORDER_WIDTH, get_skin_height(), 0, 0, Width, Height, Width,Height,Width*4); |
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113 | |||
114 | int start = time_now(); |
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115 | int frames = 0; |
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116 | |||
117 | while(repeat) |
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118 | { |
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119 | int now = time_now(); |
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120 | oskey_t key; |
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121 | |||
122 | ev = check_os_event(); |
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123 | switch(ev) |
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124 | { |
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125 | case 1: |
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126 | DrawWindow(0,0,0,0, NULL, 0x000000,0x74); |
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127 | break; |
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128 | |||
129 | case 2: |
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130 | key = get_key(); |
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131 | keyboard(key.code); |
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132 | break; |
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133 | |||
134 | case 3: |
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135 | if(get_os_button()==1) |
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136 | repeat=0; |
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137 | continue; |
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138 | }; |
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139 | |||
140 | if (now - start >= 5000) |
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141 | { |
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142 | double elapsed = (double) (now - start) / 1000.0; |
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143 | |||
144 | printf("%d frames in %3.1f seconds = %6.3f FPS\n", |
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145 | frames, elapsed, frames / elapsed); |
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146 | fflush(stdout); |
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147 | |||
148 | start = now; |
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149 | frames = 0; |
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150 | } |
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151 | |||
152 | idle(); |
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153 | draw(); |
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154 | glFlush(); |
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155 | Blit(buffer, TYPE_3_BORDER_WIDTH, get_skin_height(), 0, 0, Width, Height, Width,Height,Width*4); |
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156 | frames++; |
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157 | }; |
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158 | |||
159 | /* free the image buffer */ |
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160 | free( buffer ); |
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161 | |||
162 | /* destroy the context */ |
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163 | OSMesaDestroyContext( ctx ); |
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164 | |||
165 | return 0; |
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166 | } |
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167 |