annotate test/testgles.c @ 2765:f55c87ae336b

Final merge of Google Summer of Code 2008 work... Bring SDL to iPhone and iPod Touch by Holmes Futrell, mentored by Sam Lantinga
author Sam Lantinga <slouken@libsdl.org>
date Sat, 04 Oct 2008 06:46:59 +0000
parents
children 82e60908fab1
rev   line source
2765
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1 #include <stdlib.h>
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2 #include <stdio.h>
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3 #include <string.h>
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4 #include <math.h>
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5
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6 #include "common.h"
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7
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8 #ifdef __IPHONEOS__
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9 #define HAVE_OPENGLES
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10 #endif
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11
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12 #ifdef HAVE_OPENGLES
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13
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14 #include "SDL_opengles.h"
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15
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16 static CommonState *state;
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17 static SDL_GLContext context;
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18
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19 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
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20 static void
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21 quit(int rc)
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22 {
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23 if (context) {
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24 /* SDL_GL_MakeCurrent(0, NULL); *//* doesn't do anything */
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25 SDL_GL_DeleteContext(context);
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26 }
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27 CommonQuit(state);
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28 exit(rc);
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29 }
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30
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31 static void
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32 Render()
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33 {
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34 static GLubyte color[8][4] = { {255, 0, 0, 0},
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35 {255, 0, 0, 255},
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36 {0, 255, 0, 255},
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37 {0, 255, 0, 255},
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38 {0, 255, 0, 255},
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39 {255, 255, 255, 255},
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40 {255, 0, 255, 255},
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41 {0, 0, 255, 255}
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42 };
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43 static GLfloat cube[8][3] = { {0.5, 0.5, -0.5},
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44 {0.5f, -0.5f, -0.5f},
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45 {-0.5f, -0.5f, -0.5f},
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46 {-0.5f, 0.5f, -0.5f},
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47 {-0.5f, 0.5f, 0.5f},
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48 {0.5f, 0.5f, 0.5f},
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49 {0.5f, -0.5f, 0.5f},
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50 {-0.5f, -0.5f, 0.5f}
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51 };
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52 static GLubyte indices[36] = { 0, 3, 4,
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53 4, 5, 0,
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54 0, 5, 6,
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55 6, 1, 0,
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56 6, 7, 2,
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57 2, 1, 6,
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58 7, 4, 3,
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59 3, 2, 7,
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60 5, 4, 7,
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61 7, 6, 5,
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62 2, 3, 1,
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63 3, 0, 1
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64 };
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65
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66
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67 /* Do our drawing, too. */
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68 glClearColor(0.0, 0.0, 0.0, 1.0);
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69 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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70
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71 /* Draw the cube */
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72 glColorPointer(4, GL_UNSIGNED_BYTE, 0, color);
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73 glEnableClientState(GL_COLOR_ARRAY);
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74 glVertexPointer(3, GL_FLOAT, 0, cube);
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75 glEnableClientState(GL_VERTEX_ARRAY);
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76 glDrawElements(GL_TRIANGLES, 36, GL_UNSIGNED_BYTE, indices);
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77
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78 glMatrixMode(GL_MODELVIEW);
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79 glRotatef(5.0, 1.0, 1.0, 1.0);
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80 }
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81
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82 int
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83 main(int argc, char *argv[])
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84 {
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85 int fsaa, accel;
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86 int value;
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87 int i, done;
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88 SDL_DisplayMode mode;
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89 SDL_Event event;
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90 Uint32 then, now, frames;
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91
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92 /* Initialize parameters */
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93 fsaa = 0;
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94 accel = 0;
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95
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96 /* Initialize test framework */
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97 state = CommonCreateState(argv, SDL_INIT_VIDEO);
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98 if (!state) {
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99 return 1;
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100 }
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101 for (i = 1; i < argc;) {
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102 int consumed;
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103
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104 consumed = CommonArg(state, i);
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105 if (consumed == 0) {
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106 if (SDL_strcasecmp(argv[i], "--fsaa") == 0) {
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107 ++fsaa;
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108 consumed = 1;
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109 } else if (SDL_strcasecmp(argv[i], "--accel") == 0) {
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110 ++accel;
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111 consumed = 1;
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112 } else {
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113 consumed = -1;
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114 }
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115 }
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116 if (consumed < 0) {
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117 fprintf(stderr, "Usage: %s %s [--fsaa] [--accel]\n", argv[0],
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118 CommonUsage(state));
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119 quit(1);
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120 }
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121 i += consumed;
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122 }
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123
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124 /* Set OpenGL parameters */
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125 state->window_flags |= SDL_WINDOW_OPENGL;
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126 SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 5);
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127 SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 5);
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128 SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 5);
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129 SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
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130 if (fsaa) {
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131 SDL_GL_SetAttribute(SDL_GL_MULTISAMPLEBUFFERS, 1);
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132 SDL_GL_SetAttribute(SDL_GL_MULTISAMPLESAMPLES, fsaa);
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133 }
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134 if (accel) {
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135 SDL_GL_SetAttribute(SDL_GL_ACCELERATED_VISUAL, 1);
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136 }
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137 if (!CommonInit(state)) {
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138 quit(2);
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139 }
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140
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141 /* Create OpenGL context */
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142 context = SDL_GL_CreateContext(state->windows[0]);
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143 if (!context) {
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144 fprintf(stderr, "SDL_GL_CreateContext(): %s\n", SDL_GetError());
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145 quit(2);
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146 }
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147
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148 if (state->render_flags & SDL_RENDERER_PRESENTVSYNC) {
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149 SDL_GL_SetSwapInterval(1);
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150 } else {
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151 SDL_GL_SetSwapInterval(0);
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152 }
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153
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154 SDL_GetCurrentDisplayMode(&mode);
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155 printf("Screen BPP: %d\n", SDL_BITSPERPIXEL(mode.format));
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156 printf("\n");
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157 printf("Vendor : %s\n", glGetString(GL_VENDOR));
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158 printf("Renderer : %s\n", glGetString(GL_RENDERER));
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159 printf("Version : %s\n", glGetString(GL_VERSION));
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160 printf("Extensions : %s\n", glGetString(GL_EXTENSIONS));
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161 printf("\n");
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162
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163 SDL_GL_GetAttribute(SDL_GL_RED_SIZE, &value);
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164 printf("SDL_GL_RED_SIZE: requested %d, got %d\n", 5, value);
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165 SDL_GL_GetAttribute(SDL_GL_GREEN_SIZE, &value);
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166 printf("SDL_GL_GREEN_SIZE: requested %d, got %d\n", 5, value);
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167 SDL_GL_GetAttribute(SDL_GL_BLUE_SIZE, &value);
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168 printf("SDL_GL_BLUE_SIZE: requested %d, got %d\n", 5, value);
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169 SDL_GL_GetAttribute(SDL_GL_DEPTH_SIZE, &value);
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170 printf("SDL_GL_DEPTH_SIZE: requested %d, got %d\n", 16, value);
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171 if (fsaa) {
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172 SDL_GL_GetAttribute(SDL_GL_MULTISAMPLEBUFFERS, &value);
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173 printf("SDL_GL_MULTISAMPLEBUFFERS: requested 1, got %d\n", value);
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174 SDL_GL_GetAttribute(SDL_GL_MULTISAMPLESAMPLES, &value);
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175 printf("SDL_GL_MULTISAMPLESAMPLES: requested %d, got %d\n", fsaa,
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176 value);
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177 }
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178 if (accel) {
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179 SDL_GL_GetAttribute(SDL_GL_ACCELERATED_VISUAL, &value);
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180 printf("SDL_GL_ACCELERATED_VISUAL: requested 1, got %d\n", value);
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181 }
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182
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183 /* Set rendering settings */
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184 glMatrixMode(GL_PROJECTION);
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185 glLoadIdentity();
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186 glOrthof(-2.0, 2.0, -2.0, 2.0, -20.0, 20.0);
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187 glMatrixMode(GL_MODELVIEW);
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188 glLoadIdentity();
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189 glEnable(GL_DEPTH_TEST);
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190 glDepthFunc(GL_LESS);
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191 glShadeModel(GL_SMOOTH);
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192
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193 /* Main render loop */
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194 frames = 0;
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195 then = SDL_GetTicks();
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196 done = 0;
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197 while (!done) {
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198 /* Check for events */
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199 ++frames;
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200 while (SDL_PollEvent(&event)) {
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201 CommonEvent(state, &event, &done);
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202 }
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203 for (i = 0; i < state->num_windows; ++i) {
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204 int w, h;
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205 SDL_GL_MakeCurrent(state->windows[i], context);
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206 SDL_GetWindowSize(state->windows[i], &w, &h);
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207 glViewport(0, 0, w, h);
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208 Render();
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209 SDL_GL_SwapWindow(state->windows[i]);
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210 }
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211 }
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212
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213 /* Print out some timing information */
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214 now = SDL_GetTicks();
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215 if (now > then) {
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216 printf("%2.2f frames per second\n",
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217 ((double) frames * 1000) / (now - then));
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218 }
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219 quit(0);
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220 return 0;
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221 }
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222
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223 #else /* HAVE_OPENGLES */
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224
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225 int
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226 main(int argc, char *argv[])
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227 {
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228 printf("No OpenGL ES support on this system\n");
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229 return 1;
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230 }
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231
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232 #endif /* HAVE_OPENGLES */