JNIEXPORT void JNICALL Java_org_lwjgl_opengl_NVPathRendering_nglCoverStrokePathInstancedNV(JNIEnv *env, jclass clazz, jint numPaths, jint pathNameType, jlong paths, jint pathBase, jint coverMode, jint transformType, jlong transformValues, jlong function_pointer) {
const GLvoid *paths_address = (const GLvoid *)(intptr_t)paths;
const GLfloat *transformValues_address = (const GLfloat *)(intptr_t)transformValues;
glCoverStrokePathInstancedNVPROC glCoverStrokePathInstancedNV = (glCoverStrokePathInstancedNVPROC)((intptr_t)function_pointer);
glCoverStrokePathInstancedNV(numPaths, pathNameType, paths_address, pathBase, coverMode, transformType, transformValues_address);
}
void NVPTextBox::draw ( Vec2f offset )
{
if ( mInvalid )
render();
if ( mFont ) {
float pixelSize = mFontPt;
float resolution = DPI;
float fScale = mFontPt * resolution / ( DPI * emScale );
//not sure why this scale is needed to match point size?
float fscal = fScale * .75f;
glEnable ( GL_STENCIL_TEST );
glStencilFunc ( GL_NOTEQUAL, 0, ~0 );
glStencilOp ( GL_KEEP, GL_KEEP, GL_ZERO );
glStencilMask ( 0xFFFFFFFF );
gl::pushMatrices();
gl::translate ( offset );
gl::scale ( fscal, -fscal, fscal );
NVPFont::FontMetrics metrics = mFont->getFontMetrics();
if ( mUnderline ) {
/* Draw an underline with conventional OpenGL rendering. */
float position = metrics.mUnderlinePosition,
half_thickness = metrics.mUnderlineThickness / 2;
glDisable ( GL_STENCIL_TEST );
gl::color ( mFillColor );
glBegin ( GL_QUAD_STRIP ); {
glVertex2f ( 0, position + half_thickness );
glVertex2f ( 0, position - half_thickness );
glVertex2f ( mTotalAdvance, position + half_thickness );
glVertex2f ( mTotalAdvance, position - half_thickness );
} glEnd();
glEnable ( GL_STENCIL_TEST );
}
gl::translate ( -mInitialOffset, 0.f );
if ( mFont->getStrokeWidth() > 0.f ) {
/* Add stroking "behind" the filled characters. */
glStencilStrokePathInstancedNV ( ( GLsizei ) mMessageLen,
GL_UNSIGNED_BYTE, mText.c_str(), mFont->getGlyphs(),
1, ~0, /* Use all stencil bits */
GL_TRANSLATE_X_NV, xtranslate );
gl::color ( mStrokeColor );
glCoverStrokePathInstancedNV ( ( GLsizei ) mMessageLen,
GL_UNSIGNED_BYTE, mText.c_str(), mFont->getGlyphs(),
GL_BOUNDING_BOX_OF_BOUNDING_BOXES_NV,
GL_TRANSLATE_X_NV, xtranslate );
}
if ( mFilling ) {
/* STEP 1: stencil message into stencil buffer. Results in samples
within the message's glyphs to have a non-zero stencil value. */
glStencilFillPathInstancedNV ( ( GLsizei ) mMessageLen,
GL_UNSIGNED_BYTE, mText.c_str(), mFont->getGlyphs(),
GL_PATH_FILL_MODE_NV, ~0, /* Use all stencil bits */
GL_TRANSLATE_X_NV, xtranslate );
gl::color ( mFillColor );
glCoverFillPathInstancedNV ( ( GLsizei ) mMessageLen,
GL_UNSIGNED_BYTE, mText.c_str(), mFont->getGlyphs(),
GL_BOUNDING_BOX_OF_BOUNDING_BOXES_NV,
GL_TRANSLATE_X_NV, xtranslate );
}
gl::translate ( mInitialOffset, 0.f );
if ( mDebugDraw ) {
gl::translate ( -mInitialOffset, 0.f );
glDisable ( GL_STENCIL_TEST );
for ( int i = 0; i < int ( mMessageLen ); i++ ) {
int charInd = mText.c_str() [i];
float glyphWidth = mFont->getGlyphMetrics()->mGlyphWidth[charInd];
float glyphHeight = mFont->getGlyphMetrics()->mGlyphHeight[charInd];
float horizontalBearingX = mFont->getGlyphMetrics()->mHorizontalBearingX[charInd];
float horizontalBearingY = mFont->getGlyphMetrics()->mHorizontalBearingY[charInd];
float verticalBearingX = mFont->getGlyphMetrics()->mVerticalBearingX[charInd];
float verticalBearingY = mFont->getGlyphMetrics()->mVerticalBearingY[charInd];
float nextXBearing = mFont->getGlyphMetrics()->mHorizontalBearingX[mText.c_str() [i + 1]];
float lastXBearing;
if ( i > 0 )
lastXBearing = mFont->getGlyphMetrics()->mHorizontalBearingX[mText.c_str() [i - 1]];
float startX = xtranslate[i];
//draw glyph bounds
gl::color ( Color ( 0.f, 1.f, 0.f ) );
gl::drawStrokedRect ( Rectf ( startX + horizontalBearingX, horizontalBearingY - glyphHeight, startX + horizontalBearingX + glyphWidth, horizontalBearingY ) );
}
gl::translate ( mInitialOffset, 0.f );
gl::color ( Color ( 0.f, 0.f, 1.f ) );
gl::drawStrokedRect ( Rectf ( 0, metrics.mDescender, mTotalAdvance, metrics.mAscender + metrics.mDescender ) );
gl::color ( Color ( 1.f, 0.f, 0.f ) );
gl::drawSolidCircle ( Vec2f ( 0.f, 0.f ), 100 );
glEnable ( GL_STENCIL_TEST );
}
gl::popMatrices();
glDisable ( GL_STENCIL_TEST );
}
}
