0N/A/*
2362N/A * Copyright (c) 2003, 2006, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
2362N/A * published by the Free Software Foundation. Oracle designates this
0N/A * particular file as subject to the "Classpath" exception as provided
2362N/A * by Oracle in the LICENSE file that accompanied this code.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
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0N/A */
0N/A
0N/A#ifndef HEADLESS
0N/A
0N/A#include "sun_java2d_opengl_OGLMaskFill.h"
0N/A
0N/A#include "OGLMaskFill.h"
0N/A#include "OGLRenderQueue.h"
0N/A#include "OGLVertexCache.h"
0N/A
0N/A/**
0N/A * This implementation first copies the alpha tile into a texture and then
0N/A * maps that texture to the destination surface. This approach appears to
0N/A * offer the best performance despite being a two-step process.
0N/A *
0N/A * When the source paint is a Color, we can simply use the GL_MODULATE
0N/A * function to multiply the current color (already premultiplied with the
0N/A * extra alpha value from the AlphaComposite) with the alpha value from
0N/A * the mask texture tile. In picture form, this process looks like:
0N/A *
0N/A * A R G B
0N/A * primary color Pa Pr Pg Pb (modulated with...)
0N/A * texture unit 0 Ca Ca Ca Ca
0N/A * ---------------------------------------
0N/A * resulting color Ra Rr Rg Rb
0N/A *
0N/A * where:
0N/A * Px = current color (already premultiplied by extra alpha)
0N/A * Cx = coverage value from mask tile
0N/A * Rx = resulting color/alpha component
0N/A *
0N/A * When the source paint is not a Color, it means that we are rendering with
0N/A * a complex paint (e.g. GradientPaint, TexturePaint). In this case, we
0N/A * rely on the GL_ARB_multitexture extension to effectively multiply the
0N/A * paint fragments (autogenerated on texture unit 1, see the
0N/A * OGLPaints_Set{Gradient,Texture,etc}Paint() methods for more details)
0N/A * with the coverage values from the mask texture tile (provided on texture
0N/A * unit 0), all of which is multiplied with the current color value (which
0N/A * contains the extra alpha value). In picture form:
0N/A *
0N/A * A R G B
0N/A * primary color Ea Ea Ea Ea (modulated with...)
0N/A * texture unit 0 Ca Ca Ca Ca (modulated with...)
0N/A * texture unit 1 Pa Pr Pg Pb
0N/A * ---------------------------------------
0N/A * resulting color Ra Rr Rg Rb
0N/A *
0N/A * where:
0N/A * Ea = extra alpha
0N/A * Cx = coverage value from mask tile
0N/A * Px = gradient/texture paint color (generated for each fragment)
0N/A * Rx = resulting color/alpha component
0N/A *
0N/A * Here are some descriptions of the many variables used in this method:
0N/A * x,y - upper left corner of the tile destination
0N/A * w,h - width/height of the mask tile
0N/A * x0 - placekeeper for the original destination x location
0N/A * tw,th - width/height of the actual texture tile in pixels
0N/A * sx1,sy1 - upper left corner of the mask tile source region
0N/A * sx2,sy2 - lower left corner of the mask tile source region
0N/A * sx,sy - "current" upper left corner of the mask tile region of interest
0N/A */
0N/Avoid
0N/AOGLMaskFill_MaskFill(OGLContext *oglc,
0N/A jint x, jint y, jint w, jint h,
0N/A jint maskoff, jint maskscan, jint masklen,
0N/A unsigned char *pMask)
0N/A{
0N/A J2dTraceLn(J2D_TRACE_INFO, "OGLMaskFill_MaskFill");
0N/A
0N/A RETURN_IF_NULL(oglc);
0N/A CHECK_PREVIOUS_OP(OGL_STATE_MASK_OP);
0N/A
0N/A J2dTraceLn4(J2D_TRACE_VERBOSE, " x=%d y=%d w=%d h=%d", x, y, w, h);
0N/A J2dTraceLn2(J2D_TRACE_VERBOSE, " maskoff=%d maskscan=%d",
0N/A maskoff, maskscan);
0N/A
0N/A {
0N/A jint tw, th, x0;
0N/A jint sx1, sy1, sx2, sy2;
0N/A jint sx, sy, sw, sh;
0N/A
0N/A x0 = x;
0N/A tw = OGLVC_MASK_CACHE_TILE_WIDTH;
0N/A th = OGLVC_MASK_CACHE_TILE_HEIGHT;
0N/A sx1 = maskoff % maskscan;
0N/A sy1 = maskoff / maskscan;
0N/A sx2 = sx1 + w;
0N/A sy2 = sy1 + h;
0N/A
0N/A for (sy = sy1; sy < sy2; sy += th, y += th) {
0N/A x = x0;
0N/A sh = ((sy + th) > sy2) ? (sy2 - sy) : th;
0N/A
0N/A for (sx = sx1; sx < sx2; sx += tw, x += tw) {
0N/A sw = ((sx + tw) > sx2) ? (sx2 - sx) : tw;
0N/A
0N/A OGLVertexCache_AddMaskQuad(oglc,
0N/A sx, sy, x, y, sw, sh,
0N/A maskscan, pMask);
0N/A }
0N/A }
0N/A }
0N/A}
0N/A
0N/AJNIEXPORT void JNICALL
0N/AJava_sun_java2d_opengl_OGLMaskFill_maskFill
0N/A (JNIEnv *env, jobject self,
0N/A jint x, jint y, jint w, jint h,
0N/A jint maskoff, jint maskscan, jint masklen,
0N/A jbyteArray maskArray)
0N/A{
0N/A OGLContext *oglc = OGLRenderQueue_GetCurrentContext();
0N/A unsigned char *mask;
0N/A
0N/A J2dTraceLn(J2D_TRACE_ERROR, "OGLMaskFill_maskFill");
0N/A
0N/A if (maskArray != NULL) {
0N/A mask = (unsigned char *)
0N/A (*env)->GetPrimitiveArrayCritical(env, maskArray, NULL);
0N/A } else {
0N/A mask = NULL;
0N/A }
0N/A
0N/A OGLMaskFill_MaskFill(oglc,
0N/A x, y, w, h,
0N/A maskoff, maskscan, masklen, mask);
0N/A
0N/A // 6358147: reset current state, and ensure rendering is flushed to dest
0N/A if (oglc != NULL) {
0N/A RESET_PREVIOUS_OP();
0N/A j2d_glFlush();
0N/A }
0N/A
0N/A if (mask != NULL) {
0N/A (*env)->ReleasePrimitiveArrayCritical(env, maskArray, mask, JNI_ABORT);
0N/A }
0N/A}
0N/A
0N/A#endif /* !HEADLESS */