const Shader* shaderContext( UThread* ut, const UCell* cell,
const UBuffer** blkPtr )
{
const UBuffer* ctx;
if( ur_is(cell, UT_CONTEXT) )
{
ctx = ur_bufferSer( cell );
cell = ur_ctxCell( ctx, 0 );
if( ! cell )
return 0;
}
else
{
ctx = 0;
}
if( ur_is(cell, UT_SHADER) )
{
const Shader* sh = (const Shader*) ur_bufferSer( cell )->ptr.v;
if( blkPtr )
*blkPtr = ctx;
return sh;
}
return 0;
}
static void itemview_rebuildAttr( UThread* ut, GItemView* ep,
const UBuffer* items, int page )
{
#define MAX_ITEM_TRIS 400
#define MAX_DEC_TRIS 100
#define TRI_ATTR_BYTES (3 * AttrCount * sizeof(GLfloat))
DrawContext dc;
UBlockIter bi;
UBlockIter layout;
UBuffer* fcBuf;
const UCell* loStart;
UCell* cell;
float* attr;
int bsize;
int height = ep->itemHeight;
int caOffset = items->used + DECORATION_GROUPS;
// Reserve triangles for each item.
ur_binReserve( &glEnv.tmpBin,
(MAX_DEC_TRIS + (items->used * MAX_ITEM_TRIS)) * TRI_ATTR_BYTES );
attr = glEnv.tmpBin.ptr.f;
// Reserve first & count arrays. fcBuf->used tracks the number of items
// and view decorations, which is half the number of integers used for
// both arrays.
fcBuf = &ep->fc[ page ];
ur_arrReserve( fcBuf, caOffset * 2 );
fcBuf->used = 0;
dc.attr = attr;
dc.drawFirst = 0;
dc.penX = 0.0;
#if 1
// Build selected background tris.
dc.drawCount = 0;
if( ep->selRow > -1 )
{
dc.color[0] = 1.0;
dc.color[1] = dc.color[2] = 0.0;
dc.penY = ep->wid.area.h;
cell = glEnv.guiStyle + CI_STYLE_AREA;
//ur_setId(cell, UT_COORD)
cell->coord.len = 4;
cell->coord.n[0] = 0;
cell->coord.n[1] = (ep->selRow + 1) * -height;
cell->coord.n[2] = ep->itemWidth;
cell->coord.n[3] = height;
layout.buf = ur_buffer( ep->selectBgBlkN );
layout.it = layout.buf->ptr.cell;
layout.end = layout.it + layout.buf->used;
if( ! itemview_parse( &dc, ut, &layout, (GWidget*) ep ) )
{
boron_reset(ut);
printf( "KR itemview_parse failed\n" );
}
}
fcBuf->ptr.i[ fcBuf->used ] = dc.drawFirst;
fcBuf->ptr.i[ fcBuf->used + caOffset ] = dc.drawCount;
++fcBuf->used;
dc.attr = attr + MAX_DEC_TRIS * 3 * AttrCount;
dc.drawFirst = MAX_DEC_TRIS * 3;
#endif
dc.penY = ep->wid.area.h;
// Setup the data item and layout iterators.
bi.it = items->ptr.cell;
bi.end = bi.it + items->used;
layout.buf = ur_buffer( ep->layoutBlkN );
loStart = layout.buf->ptr.cell;
layout.end = loStart + layout.buf->used;
ur_foreach( bi )
{
// Set item word to current data value.
cell = ur_ctxCell( ur_buffer( ep->bindCtxN ), 0 );
*cell = *bi.it;
dc.drawCount = 0;
dc.color[0] = 1.0;
dc.color[1] = dc.color[2] = 0.0;
dc.penY -= height;
layout.it = loStart;
if( ! itemview_parse( &dc, ut, &layout, (GWidget*) ep ) )
{
boron_reset(ut);
printf( "KR itemview_parse failed\n" );
}
//printf( "KR fc %d,%d\n", dc.drawFirst, dc.drawCount );
fcBuf->ptr.i[ fcBuf->used ] = dc.drawFirst;
fcBuf->ptr.i[ fcBuf->used + caOffset ] = dc.drawCount;
++fcBuf->used;
dc.drawFirst += dc.drawCount;
//dc.drawFirst += MAX_ITEM_TRIS;
}
assert( fcBuf->used == caOffset );
// Transfer vertex data to GPU.
bsize = dc.drawFirst * TRI_ATTR_BYTES;
if( ep->vboSize[ page ] < bsize )
{
ep->vboSize[ page ] = bsize;
glBufferData( GL_ARRAY_BUFFER, bsize, attr, GL_STATIC_DRAW );
}
else
{
float* abuf = (float*) glMapBuffer( GL_ARRAY_BUFFER, GL_WRITE_ONLY );
if( abuf )
{
memCpy( abuf, attr, bsize );
glUnmapBuffer( GL_ARRAY_BUFFER );
}
}
}
