/**
* Adds the given glyph to the glyph cache (texture and data structure)
* associated with the given OGLContext.
*/
static void
OGLTR_AddToGlyphCache(GlyphInfo *glyph, jboolean rgbOrder)
{
GLenum pixelFormat;
CacheCellInfo *ccinfo;
J2dTraceLn(J2D_TRACE_INFO, "OGLTR_AddToGlyphCache");
if ((glyphCache == NULL) || (glyph->image == NULL)) {
return;
}
if (cacheStatus == CACHE_LCD) {
pixelFormat = rgbOrder ? GL_RGB : GL_BGR;
} else {
pixelFormat = GL_LUMINANCE;
}
AccelGlyphCache_AddGlyph(glyphCache, glyph);
ccinfo = (CacheCellInfo *) glyph->cellInfo;
if (ccinfo != NULL) {
// store glyph image in texture cell
j2d_glTexSubImage2D(GL_TEXTURE_2D, 0,
ccinfo->x, ccinfo->y,
glyph->width, glyph->height,
pixelFormat, GL_UNSIGNED_BYTE, glyph->image);
}
}
HRESULT
D3DGlyphCache::AddGlyph(GlyphInfo *glyph)
{
HRESULT res = S_OK;
RETURN_STATUS_IF_NULL(pGlyphCacheRes, E_FAIL);
CacheCellInfo *cellInfo = AccelGlyphCache_AddGlyph(pGlyphCache, glyph);
if (cellInfo != NULL) {
jint pixelsTouchedL = 0, pixelsTouchedR = 0;
// store glyph image in texture cell
res = pCtx->UploadTileToTexture(pGlyphCacheRes,
glyph->image,
cellInfo->x, cellInfo->y,
0, 0,
glyph->width, glyph->height,
glyph->rowBytes, tileFormat,
&pixelsTouchedL,
&pixelsTouchedR);
// LCD text rendering optimization: if the number of pixels touched on
// the first or last column of the glyph image is less than 1/3 of the
// height of the glyph we do not consider them touched.
// See D3DTextRenderer.cpp:UpdateCachedDestination for more information.
// The leftOff/rightOff are only used in LCD cache case.
if (gcType == CACHE_LCD) {
jint threshold = glyph->height/3;
cellInfo->leftOff = pixelsTouchedL < threshold ? 1 : 0;
cellInfo->rightOff = pixelsTouchedR < threshold ? -1 : 0;
} else {
cellInfo->leftOff = 0;
cellInfo->rightOff = 0;
}
}
return res;
}