/**
* Create a drawing surface which can be directly displayed on a screen.
*/
static EGLSurface
fbCreateScreenSurfaceMESA(_EGLDriver *drv, EGLDisplay dpy, EGLConfig cfg,
const EGLint *attrib_list)
{
_EGLConfig *config = _eglLookupConfig(drv, dpy, cfg);
fbDisplay *display = Lookup_fbDisplay(dpy);
fbSurface *surface;
EGLSurface surf;
GLvisual vis;
GLcontext *ctx = NULL; /* this should be OK */
int origin, bytesPerPixel;
int width, height, stride;
surface = (fbSurface *) malloc(sizeof(*surface));
if (!surface) {
return EGL_NO_SURFACE;
}
/* init base class, error check, etc. */
surf = _eglInitScreenSurface(&surface->Base, drv, dpy, cfg, attrib_list);
if (surf == EGL_NO_SURFACE) {
free(surface);
return EGL_NO_SURFACE;
}
/* convert EGLConfig to GLvisual */
_eglConfigToContextModesRec(config, &vis);
/* create Mesa framebuffer */
surface->mesa_framebuffer = _mesa_create_framebuffer(&vis);
if (!surface->mesa_framebuffer) {
free(surface);
_eglRemoveSurface(&surface->Base);
return EGL_NO_SURFACE;
}
width = surface->Base.Width;
height = surface->Base.Height;
bytesPerPixel = vis.rgbBits / 8;
stride = width * bytesPerPixel;
origin = 0;
/* front color renderbuffer */
{
driRenderbuffer *drb = driNewRenderbuffer(GL_RGBA, display->pFB,
bytesPerPixel,
origin, stride, NULL);
fbSetSpanFunctions(drb, &vis);
_mesa_add_renderbuffer(surface->mesa_framebuffer,
BUFFER_FRONT_LEFT, &drb->Base);
}
/* back color renderbuffer */
if (vis.doubleBufferMode) {
GLubyte *backBuf = _mesa_malloc(stride * height);
driRenderbuffer *drb = driNewRenderbuffer(GL_RGBA, backBuf,
bytesPerPixel,
origin, stride, NULL);
fbSetSpanFunctions(drb, &vis);
_mesa_add_renderbuffer(surface->mesa_framebuffer,
BUFFER_BACK_LEFT, &drb->Base);
}
/* other renderbuffers- software based */
_mesa_add_soft_renderbuffers(surface->mesa_framebuffer,
GL_FALSE, /* color */
vis.haveDepthBuffer,
vis.haveStencilBuffer,
vis.haveAccumBuffer,
GL_FALSE, /* alpha */
GL_FALSE /* aux */);
_mesa_resize_framebuffer(ctx, surface->mesa_framebuffer, width, height);
return surf;
}
/* Create and initialize the Mesa and driver specific pixmap buffer
* data.
*/
static GLboolean
fbCreateBuffer( __DRIscreenPrivate *driScrnPriv,
__DRIdrawablePrivate *driDrawPriv,
const __GLcontextModes *mesaVis,
GLboolean isPixmap )
{
struct gl_framebuffer *mesa_framebuffer;
if (isPixmap) {
return GL_FALSE; /* not implemented */
}
else {
const GLboolean swDepth = mesaVis->depthBits > 0;
const GLboolean swAlpha = mesaVis->alphaBits > 0;
const GLboolean swAccum = mesaVis->accumRedBits > 0;
const GLboolean swStencil = mesaVis->stencilBits > 0;
mesa_framebuffer = _mesa_create_framebuffer(mesaVis);
if (!mesa_framebuffer)
return 0;
/* XXX double-check these parameters (bpp vs cpp, etc) */
{
driRenderbuffer *drb = driNewRenderbuffer(GL_RGBA,
driScrnPriv->pFB,
driScrnPriv->fbBPP / 8,
driScrnPriv->fbOrigin,
driScrnPriv->fbStride,
driDrawPriv);
fbSetSpanFunctions(drb, mesaVis);
_mesa_add_renderbuffer(mesa_framebuffer,
BUFFER_FRONT_LEFT, &drb->Base);
}
if (mesaVis->doubleBufferMode) {
/* XXX what are the correct origin/stride values? */
GLvoid *backBuf = _mesa_malloc(driScrnPriv->fbStride
* driScrnPriv->fbHeight);
driRenderbuffer *drb = driNewRenderbuffer(GL_RGBA,
backBuf,
driScrnPriv->fbBPP /8,
driScrnPriv->fbOrigin,
driScrnPriv->fbStride,
driDrawPriv);
fbSetSpanFunctions(drb, mesaVis);
_mesa_add_renderbuffer(mesa_framebuffer,
BUFFER_BACK_LEFT, &drb->Base);
}
_mesa_add_soft_renderbuffers(mesa_framebuffer,
GL_FALSE, /* color */
swDepth,
swStencil,
swAccum,
swAlpha, /* or always zero? */
GL_FALSE /* aux */);
driDrawPriv->driverPrivate = mesa_framebuffer;
return 1;
}
}
