src/egl/drivers/demo/demo.c

   1 /*
   2  * Sample driver: Demo
   3  */
   4
   5 #include <assert.h>
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8 #include "eglconfig.h"
   9 #include "eglcontext.h"
  10 #include "egldisplay.h"
  11 #include "egldriver.h"
  12 #include "eglglobals.h"
  13 #include "eglmode.h"
  14 #include "eglscreen.h"
  15 #include "eglsurface.h"
  16
  17
  18 /**
  19  * Demo driver-specific driver class derived from _EGLDriver
  20  */
  21 typedef struct demo_driver
  22 {
  23    _EGLDriver Base;  /* base class/object */
  24    unsigned DemoStuff;
  25 } DemoDriver;
  26
  27 #define DEMO_DRIVER(D) ((DemoDriver *) (D))
  28
  29
  30 /**
  31  * Demo driver-specific surface class derived from _EGLSurface
  32  */
  33 typedef struct demo_surface
  34 {
  35    _EGLSurface Base;  /* base class/object */
  36    unsigned DemoStuff;
  37 } DemoSurface;
  38
  39
  40 /**
  41  * Demo driver-specific context class derived from _EGLContext
  42  */
  43 typedef struct demo_context
  44 {
  45    _EGLContext Base;  /* base class/object */
  46    unsigned DemoStuff;
  47 } DemoContext;
  48
  49
  50
  51 static EGLBoolean
  52 demoInitialize(_EGLDriver *drv, EGLDisplay dpy, EGLint *major, EGLint *minor)
  53 {
  54    _EGLDisplay *disp = _eglLookupDisplay(dpy);
  55    _EGLScreen *scrn;
  56    EGLint i;
  57
  58    /* Create a screen */
  59    scrn = calloc(1, sizeof(*scrn));
  60    _eglAddScreen(disp, scrn);
  61
  62    /* Create the screen's modes - silly example */
  63    _eglAddNewMode(scrn, 1600, 1200, 72 * 1000, "1600x1200-72");
  64    _eglAddNewMode(scrn, 1280, 1024, 72 * 1000, "1280x1024-70");
  65    _eglAddNewMode(scrn, 1280, 1024, 70 * 1000, "1280x1024-70");
  66    _eglAddNewMode(scrn, 1024,  768, 72 * 1000, "1024x768-72");
  67
  68    /* Create the display's visual configs - silly example */
  69    for (i = 0; i < 4; i++) {
  70       _EGLConfig *config = calloc(1, sizeof(_EGLConfig));
  71       _eglInitConfig(config, i + 1);
  72       _eglSetConfigAttrib(config, EGL_RED_SIZE, 8);
  73       _eglSetConfigAttrib(config, EGL_GREEN_SIZE, 8);
  74       _eglSetConfigAttrib(config, EGL_BLUE_SIZE, 8);
  75       _eglSetConfigAttrib(config, EGL_ALPHA_SIZE, 8);
  76       _eglSetConfigAttrib(config, EGL_BUFFER_SIZE, 32);
  77       if (i & 1) {
  78          _eglSetConfigAttrib(config, EGL_DEPTH_SIZE, 32);
  79       }
  80       if (i & 2) {
  81          _eglSetConfigAttrib(config, EGL_STENCIL_SIZE, 8);
  82       }
  83       _eglSetConfigAttrib(config, EGL_SURFACE_TYPE,
  84                           (EGL_WINDOW_BIT | EGL_PIXMAP_BIT | EGL_PBUFFER_BIT));
  85       _eglAddConfig(disp, config);
  86    }
  87
  88    drv->Initialized = EGL_TRUE;
  89
  90    *major = 1;
  91    *minor = 0;
  92
  93    return EGL_TRUE;
  94 }
  95
  96
  97 static EGLBoolean
  98 demoTerminate(_EGLDriver *drv, EGLDisplay dpy)
  99 {
 100    /*DemoDriver *demo = DEMO_DRIVER(dpy);*/
 101    free(drv);
 102    return EGL_TRUE;
 103 }
 104
 105
 106 static DemoContext *
 107 LookupDemoContext(EGLContext ctx)
 108 {
 109    _EGLContext *c = _eglLookupContext(ctx);
 110    return (DemoContext *) c;
 111 }
 112
 113
 114 static DemoSurface *
 115 LookupDemoSurface(EGLSurface surf)
 116 {
 117    _EGLSurface *s = _eglLookupSurface(surf);
 118    return (DemoSurface *) s;
 119 }
 120
 121
 122
 123 static EGLContext
 124 demoCreateContext(_EGLDriver *drv, EGLDisplay dpy, EGLConfig config, EGLContext share_list, const EGLint *attrib_list)
 125 {
 126    _EGLConfig *conf;
 127    DemoContext *c;
 128    int i;
 129
 130    conf = _eglLookupConfig(drv, dpy, config);
 131    if (!conf) {
 132       _eglError(EGL_BAD_CONFIG, "eglCreateContext");
 133       return EGL_NO_CONTEXT;
 134    }
 135
 136    for (i = 0; attrib_list && attrib_list[i] != EGL_NONE; i++) {
 137       switch (attrib_list[i]) {
 138          /* no attribs defined for now */
 139       default:
 140          _eglError(EGL_BAD_ATTRIBUTE, "eglCreateContext");
 141          return EGL_NO_CONTEXT;
 142       }
 143    }
 144
 145    c = (DemoContext *) calloc(1, sizeof(DemoContext));
 146    if (!c)
 147       return EGL_NO_CONTEXT;
 148
 149    _eglInitContext(drv, &c->Base, conf, attrib_list);
 150    c->DemoStuff = 1;
 151    printf("demoCreateContext\n");
 152
 153    /* link to display */
 154    _eglLinkContext(&c->Base, _eglLookupDisplay(dpy));
 155    assert(_eglGetContextHandle(&c->Base));
 156
 157    return _eglGetContextHandle(&c->Base);
 158 }
 159
 160
 161 static EGLSurface
 162 demoCreateWindowSurface(_EGLDriver *drv, EGLDisplay dpy, EGLConfig config, NativeWindowType window, const EGLint *attrib_list)
 163 {
 164    int i;
 165    for (i = 0; attrib_list && attrib_list[i] != EGL_NONE; i++) {
 166       switch (attrib_list[i]) {
 167          /* no attribs at this time */
 168       default:
 169          _eglError(EGL_BAD_ATTRIBUTE, "eglCreateWindowSurface");
 170          return EGL_NO_SURFACE;
 171       }
 172    }
 173    printf("eglCreateWindowSurface()\n");
 174    /* XXX unfinished */
 175
 176    return EGL_NO_SURFACE;
 177 }
 178
 179
 180 static EGLSurface
 181 demoCreatePixmapSurface(_EGLDriver *drv, EGLDisplay dpy, EGLConfig config, NativePixmapType pixmap, const EGLint *attrib_list)
 182 {
 183    _EGLConfig *conf;
 184    EGLint i;
 185
 186    conf = _eglLookupConfig(drv, dpy, config);
 187    if (!conf) {
 188       _eglError(EGL_BAD_CONFIG, "eglCreatePixmapSurface");
 189       return EGL_NO_SURFACE;
 190    }
 191
 192    for (i = 0; attrib_list && attrib_list[i] != EGL_NONE; i++) {
 193       switch (attrib_list[i]) {
 194          /* no attribs at this time */
 195       default:
 196          _eglError(EGL_BAD_ATTRIBUTE, "eglCreatePixmapSurface");
 197          return EGL_NO_SURFACE;
 198       }
 199    }
 200
 201    if (conf->Attrib[EGL_SURFACE_TYPE - FIRST_ATTRIB] == 0) {
 202       _eglError(EGL_BAD_MATCH, "eglCreatePixmapSurface");
 203       return EGL_NO_SURFACE;
 204    }
 205
 206    printf("eglCreatePixmapSurface()\n");
 207    return EGL_NO_SURFACE;
 208 }
 209
 210
 211 static EGLSurface
 212 demoCreatePbufferSurface(_EGLDriver *drv, EGLDisplay dpy, EGLConfig config,
 213                          const EGLint *attrib_list)
 214 {
 215    DemoSurface *surf = (DemoSurface *) calloc(1, sizeof(DemoSurface));
 216    _EGLConfig *conf;
 217
 218    if (!surf)
 219       return EGL_NO_SURFACE;
 220
 221    conf = _eglLookupConfig(drv, dpy, config);
 222    if (!_eglInitSurface(drv, &surf->Base, EGL_PBUFFER_BIT,
 223                         conf, attrib_list)) {
 224       free(surf);
 225       return EGL_NO_SURFACE;
 226    }
 227
 228    /* a real driver would allocate the pbuffer memory here */
 229
 230    return surf->Base.Handle;
 231 }
 232
 233
 234 static EGLBoolean
 235 demoDestroySurface(_EGLDriver *drv, EGLDisplay dpy, EGLSurface surface)
 236 {
 237    DemoSurface *fs = LookupDemoSurface(surface);
 238    _eglUnlinkSurface(&fs->Base);
 239    if (!_eglIsSurfaceBound(&fs->Base))
 240       free(fs);
 241    return EGL_TRUE;
 242 }
 243
 244
 245 static EGLBoolean
 246 demoDestroyContext(_EGLDriver *drv, EGLDisplay dpy, EGLContext context)
 247 {
 248    DemoContext *fc = LookupDemoContext(context);
 249    _eglUnlinkContext(&fc->Base);
 250    if (!_eglIsContextBound(&fc->Base))
 251       free(fc);
 252    return EGL_TRUE;
 253 }
 254
 255
 256 static EGLBoolean
 257 demoMakeCurrent(_EGLDriver *drv, EGLDisplay dpy, EGLSurface draw, EGLSurface read, EGLContext context)
 258 {
 259    /*DemoDriver *demo = DEMO_DRIVER(dpy);*/
 260    DemoSurface *readSurf = LookupDemoSurface(read);
 261    DemoSurface *drawSurf = LookupDemoSurface(draw);
 262    DemoContext *ctx = LookupDemoContext(context);
 263    EGLBoolean b;
 264
 265    b = _eglMakeCurrent(drv, dpy, draw, read, context);
 266    if (!b)
 267       return EGL_FALSE;
 268
 269    /* XXX this is where we'd do the hardware context switch */
 270    (void) drawSurf;
 271    (void) readSurf;
 272    (void) ctx;
 273
 274    printf("eglMakeCurrent()\n");
 275    return EGL_TRUE;
 276 }
 277
 278
 279 /**
 280  * The bootstrap function.  Return a new DemoDriver object and
 281  * plug in API functions.
 282  */
 283 _EGLDriver *
 284 _eglMain(_EGLDisplay *dpy, const char *args)
 285 {
 286    DemoDriver *demo;
 287
 288    demo = (DemoDriver *) calloc(1, sizeof(DemoDriver));
 289    if (!demo) {
 290       return NULL;
 291    }
 292
 293    /* First fill in the dispatch table with defaults */
 294    _eglInitDriverFallbacks(&demo->Base);
 295    /* then plug in our Demo-specific functions */
 296    demo->Base.API.Initialize = demoInitialize;
 297    demo->Base.API.Terminate = demoTerminate;
 298    demo->Base.API.CreateContext = demoCreateContext;
 299    demo->Base.API.MakeCurrent = demoMakeCurrent;
 300    demo->Base.API.CreateWindowSurface = demoCreateWindowSurface;
 301    demo->Base.API.CreatePixmapSurface = demoCreatePixmapSurface;
 302    demo->Base.API.CreatePbufferSurface = demoCreatePbufferSurface;
 303    demo->Base.API.DestroySurface = demoDestroySurface;
 304    demo->Base.API.DestroyContext = demoDestroyContext;
 305
 306    /* enable supported extensions */
 307    demo->Base.Extensions.MESA_screen_surface = EGL_TRUE;
 308    demo->Base.Extensions.MESA_copy_context = EGL_TRUE;
 309
 310    return &demo->Base;
 311 }