1 /*
2 * Copyright (c) 2019, 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 <string.h>
30
31 #include "sun_java2d_SunGraphics2D.h"
32
33 #include "MTLPaints.h"
34 #include "MTLVertexCache.h"
35
36 typedef struct _J2DVertex {
37 jfloat tx, ty;
38 jubyte r, g, b, a;
39 jfloat dx, dy;
40 } J2DVertex;
41
42 static J2DVertex *vertexCache = NULL;
43 static jint vertexCacheIndex = 0;
44
45 static jint maskCacheTexID = 0;
46 static jint maskCacheIndex = 0;
47
48 #define MTLVC_ADD_VERTEX(TX, TY, R, G, B, A, DX, DY) \
49 do { \
50 J2DVertex *v = &vertexCache[vertexCacheIndex++]; \
51 v->tx = TX; \
52 v->ty = TY; \
53 v->r = R; \
54 v->g = G; \
55 v->b = B; \
56 v->a = A; \
57 v->dx = DX; \
58 v->dy = DY; \
59 } while (0)
60
61 #define MTLVC_ADD_QUAD(TX1, TY1, TX2, TY2, DX1, DY1, DX2, DY2, R, G, B, A) \
62 do { \
63 MTLVC_ADD_VERTEX(TX1, TY1, R, G, B, A, DX1, DY1); \
64 MTLVC_ADD_VERTEX(TX2, TY1, R, G, B, A, DX2, DY1); \
65 MTLVC_ADD_VERTEX(TX2, TY2, R, G, B, A, DX2, DY2); \
66 MTLVC_ADD_VERTEX(TX1, TY2, R, G, B, A, DX1, DY2); \
67 } while (0)
68
69 jboolean
70 MTLVertexCache_InitVertexCache(MTLContext *mtlc)
71 {
72 //TODO
73 J2dTraceLn(J2D_TRACE_INFO, "MTLVertexCache_InitVertexCache");
74 return JNI_TRUE;
75 }
76
77 void
78 MTLVertexCache_FlushVertexCache()
79 {
80 // TODO
81 J2dTraceLn(J2D_TRACE_INFO, "MTLVertexCache_FlushVertexCache");
82 vertexCacheIndex = 0;
83 }
84
85 /**
86 * This method is somewhat hacky, but necessary for the foreseeable future.
87 * The problem is the way OpenGL handles color values in vertex arrays. When
88 * a vertex in a vertex array contains a color, and then the vertex array
89 * is rendered via glDrawArrays(), the global OpenGL color state is actually
90 * modified each time a vertex is rendered. This means that after all
91 * vertices have been flushed, the global OpenGL color state will be set to
92 * the color of the most recently rendered element in the vertex array.
93 *
94 * The reason this is a problem for us is that we do not want to flush the
95 * vertex array (in the case of mask/glyph operations) or issue a glEnd()
96 * (in the case of non-antialiased primitives) everytime the current color
97 * changes, which would defeat any benefit from batching in the first place.
98 * We handle this in practice by not calling CHECK/RESET_PREVIOUS_OP() when
99 * the simple color state is changing in MTLPaints_SetColor(). This is
100 * problematic for vertex caching because we may end up with the following
101 * situation, for example:
102 * SET_COLOR (orange)
103 * MASK_FILL
104 * MASK_FILL
105 * SET_COLOR (blue; remember, this won't cause a flush)
106 * FILL_RECT (this will cause the vertex array to be flushed)
107 *
108 * In this case, we would actually end up rendering an orange FILL_RECT,
109 * not a blue one as intended, because flushing the vertex cache flush would
110 * override the color state from the most recent SET_COLOR call.
111 *
112 * Long story short, the easiest way to resolve this problem is to call
113 * this method just after disabling the mask/glyph cache, which will ensure
114 * that the appropriate color state is restored.
115 */
116 void
117 MTLVertexCache_RestoreColorState(MTLContext *mtlc)
118 {
119 // TODO
120 if (mtlc.paintState == sun_java2d_SunGraphics2D_PAINT_ALPHACOLOR) {
121 [mtlc setColor:mtlc.pixel];
122 }
123 }
124
125 static jboolean
126 MTLVertexCache_InitMaskCache()
127 {
128 // TODO
129 J2dTraceLn(J2D_TRACE_INFO, "MTLVertexCache_InitMaskCache");
130 return JNI_TRUE;
131 }
132
133 void
134 MTLVertexCache_EnableMaskCache(MTLContext *mtlc)
135 {
136 // TODO
137 J2dTraceLn(J2D_TRACE_INFO, "MTLVertexCache_EnableMaskCache");
138 }
139
140 void
141 MTLVertexCache_DisableMaskCache(MTLContext *mtlc)
142 {
143 // TODO
144 J2dTraceLn(J2D_TRACE_INFO, "MTLVertexCache_DisableMaskCache");
145 maskCacheIndex = 0;
146 }
147
148 void
149 MTLVertexCache_AddMaskQuad(MTLContext *mtlc,
150 jint srcx, jint srcy,
151 jint dstx, jint dsty,
152 jint width, jint height,
153 jint maskscan, void *mask)
154 {
155 // TODO
156 }
157
158 void
159 MTLVertexCache_AddGlyphQuad(MTLContext *mtlc,
160 jfloat tx1, jfloat ty1, jfloat tx2, jfloat ty2,
161 jfloat dx1, jfloat dy1, jfloat dx2, jfloat dy2)
162 {
163 // TODO
164 J2dTraceLn(J2D_TRACE_INFO, "MTLVertexCache_AddGlyphQuad");
165 }
166
167 #endif /* !HEADLESS */