1/*
2 * Copyright (c) 2003, 2007, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26#ifndef HEADLESS
27
28#include <stdlib.h>
29#include <jlong.h>
30
31#include "OGLMaskBlit.h"
32#include "OGLRenderQueue.h"
33#include "OGLSurfaceData.h"
34
35/**
36 * REMIND: This method assumes that the dimensions of the incoming pixel
37 *         array are less than or equal to the cached blit texture tile;
38 *         these are rather fragile assumptions, and should be cleaned up...
39 */
40void
41OGLMaskBlit_MaskBlit(JNIEnv *env, OGLContext *oglc,
42                     jint dstx, jint dsty,
43                     jint width, jint height,
44                     void *pPixels)
45{
46    GLfloat tx1, ty1, tx2, ty2;
47
48    J2dTraceLn(J2D_TRACE_INFO, "OGLMaskBlit_MaskBlit");
49
50    if (width <= 0 || height <= 0) {
51        J2dTraceLn(J2D_TRACE_WARNING,
52                   "OGLMaskBlit_MaskBlit: invalid dimensions");
53        return;
54    }
55
56    RETURN_IF_NULL(pPixels);
57    RETURN_IF_NULL(oglc);
58    CHECK_PREVIOUS_OP(GL_TEXTURE_2D);
59
60    if (oglc->blitTextureID == 0) {
61        if (!OGLContext_InitBlitTileTexture(oglc)) {
62            J2dRlsTraceLn(J2D_TRACE_ERROR,
63                "OGLMaskBlit_MaskBlit: could not init blit tile");
64            return;
65        }
66    }
67
68    // set up texture parameters
69    j2d_glBindTexture(GL_TEXTURE_2D, oglc->blitTextureID);
70    OGLC_UPDATE_TEXTURE_FUNCTION(oglc, GL_MODULATE);
71    j2d_glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
72    j2d_glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
73
74    // copy system memory IntArgbPre surface into cached texture
75    j2d_glTexSubImage2D(GL_TEXTURE_2D, 0,
76                        0, 0, width, height,
77                        GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, pPixels);
78
79    tx1 = 0.0f;
80    ty1 = 0.0f;
81    tx2 = ((GLfloat)width) / OGLC_BLIT_TILE_SIZE;
82    ty2 = ((GLfloat)height) / OGLC_BLIT_TILE_SIZE;
83
84    // render cached texture to the OpenGL surface
85    j2d_glBegin(GL_QUADS);
86    j2d_glTexCoord2f(tx1, ty1); j2d_glVertex2i(dstx, dsty);
87    j2d_glTexCoord2f(tx2, ty1); j2d_glVertex2i(dstx + width, dsty);
88    j2d_glTexCoord2f(tx2, ty2); j2d_glVertex2i(dstx + width, dsty + height);
89    j2d_glTexCoord2f(tx1, ty2); j2d_glVertex2i(dstx, dsty + height);
90    j2d_glEnd();
91}
92
93#endif /* !HEADLESS */
94