/*
* Copyright (c) 2007, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
#ifndef HEADLESS
#include <stdlib.h>
#include <string.h>
#include "sun_java2d_SunGraphics2D.h"
#include "OGLPaints.h"
#include "OGLVertexCache.h"
typedef struct _J2DVertex {
jfloat tx, ty;
jubyte r, g, b, a;
jfloat dx, dy;
} J2DVertex;
static J2DVertex *vertexCache = NULL;
static jint vertexCacheIndex = 0;
static GLuint maskCacheTexID = 0;
static jint maskCacheIndex = 0;
#define OGLVC_ADD_VERTEX(TX, TY, R, G, B, A, DX, DY) \
do { \
J2DVertex *v = &vertexCache[vertexCacheIndex++]; \
v->tx = TX; \
v->ty = TY; \
v->r = R; \
v->g = G; \
v->b = B; \
v->a = A; \
v->dx = DX; \
v->dy = DY; \
} while (0)
#define OGLVC_ADD_QUAD(TX1, TY1, TX2, TY2, DX1, DY1, DX2, DY2, R, G, B, A) \
do { \
OGLVC_ADD_VERTEX(TX1, TY1, R, G, B, A, DX1, DY1); \
OGLVC_ADD_VERTEX(TX2, TY1, R, G, B, A, DX2, DY1); \
OGLVC_ADD_VERTEX(TX2, TY2, R, G, B, A, DX2, DY2); \
OGLVC_ADD_VERTEX(TX1, TY2, R, G, B, A, DX1, DY2); \
} while (0)
jboolean
OGLVertexCache_InitVertexCache(OGLContext *oglc)
{
J2dTraceLn(J2D_TRACE_INFO, "OGLVertexCache_InitVertexCache");
if (vertexCache == NULL) {
vertexCache = (J2DVertex *)malloc(OGLVC_MAX_INDEX * sizeof(J2DVertex));
if (vertexCache == NULL) {
return JNI_FALSE;
}
}
if (!oglc->vertexCacheEnabled) {
j2d_glTexCoordPointer(2, GL_FLOAT,
sizeof(J2DVertex), vertexCache);
j2d_glColorPointer(4, GL_UNSIGNED_BYTE,
sizeof(J2DVertex), ((jfloat *)vertexCache) + 2);
j2d_glVertexPointer(2, GL_FLOAT,
sizeof(J2DVertex), ((jfloat *)vertexCache) + 3);
j2d_glEnableClientState(GL_TEXTURE_COORD_ARRAY);
j2d_glEnableClientState(GL_COLOR_ARRAY);
j2d_glEnableClientState(GL_VERTEX_ARRAY);
oglc->vertexCacheEnabled = JNI_TRUE;
}
return JNI_TRUE;
}
void
OGLVertexCache_FlushVertexCache()
{
J2dTraceLn(J2D_TRACE_INFO, "OGLVertexCache_FlushVertexCache");
if (vertexCacheIndex > 0) {
j2d_glDrawArrays(GL_QUADS, 0, vertexCacheIndex);
}
vertexCacheIndex = 0;
}
/**
* This method is somewhat hacky, but necessary for the foreseeable future.
* The problem is the way OpenGL handles color values in vertex arrays. When
* a vertex in a vertex array contains a color, and then the vertex array
* is rendered via glDrawArrays(), the global OpenGL color state is actually
* modified each time a vertex is rendered. This means that after all
* vertices have been flushed, the global OpenGL color state will be set to
* the color of the most recently rendered element in the vertex array.
*
* The reason this is a problem for us is that we do not want to flush the
* vertex array (in the case of mask/glyph operations) or issue a glEnd()
* (in the case of non-antialiased primitives) everytime the current color
* changes, which would defeat any benefit from batching in the first place.
* We handle this in practice by not calling CHECK/RESET_PREVIOUS_OP() when
* the simple color state is changing in OGLPaints_SetColor(). This is
* problematic for vertex caching because we may end up with the following
* situation, for example:
* SET_COLOR (orange)
* MASK_FILL
* MASK_FILL
* SET_COLOR (blue; remember, this won't cause a flush)
* FILL_RECT (this will cause the vertex array to be flushed)
*
* In this case, we would actually end up rendering an orange FILL_RECT,
* not a blue one as intended, because flushing the vertex cache flush would
* override the color state from the most recent SET_COLOR call.
*
* Long story short, the easiest way to resolve this problem is to call
* this method just after disabling the mask/glyph cache, which will ensure
* that the appropriate color state is restored.
*/
void
OGLVertexCache_RestoreColorState(OGLContext *oglc)
{
if (oglc->paintState == sun_java2d_SunGraphics2D_PAINT_ALPHACOLOR) {
OGLPaints_SetColor(oglc, oglc->pixel);
}
}
static jboolean
OGLVertexCache_InitMaskCache()
{
J2dTraceLn(J2D_TRACE_INFO, "OGLVertexCache_InitMaskCache");
maskCacheTexID =
OGLContext_CreateBlitTexture(GL_INTENSITY8, GL_LUMINANCE,
OGLVC_MASK_CACHE_WIDTH_IN_TEXELS,
OGLVC_MASK_CACHE_HEIGHT_IN_TEXELS);
// init special fully opaque tile in the upper-right corner of
// the mask cache texture
{
GLubyte allOnes[OGLVC_MASK_CACHE_TILE_SIZE];
memset(allOnes, 0xff, OGLVC_MASK_CACHE_TILE_SIZE);
j2d_glTexSubImage2D(GL_TEXTURE_2D, 0,
OGLVC_MASK_CACHE_SPECIAL_TILE_X,
OGLVC_MASK_CACHE_SPECIAL_TILE_Y,
OGLVC_MASK_CACHE_TILE_WIDTH,
OGLVC_MASK_CACHE_TILE_HEIGHT,
GL_LUMINANCE, GL_UNSIGNED_BYTE, allOnes);
}
return JNI_TRUE;
}
void
OGLVertexCache_EnableMaskCache(OGLContext *oglc)
{
J2dTraceLn(J2D_TRACE_INFO, "OGLVertexCache_EnableMaskCache");
if (!OGLVertexCache_InitVertexCache(oglc)) {
return;
}
if (maskCacheTexID == 0) {
if (!OGLVertexCache_InitMaskCache()) {
return;
}
}
j2d_glEnable(GL_TEXTURE_2D);
j2d_glBindTexture(GL_TEXTURE_2D, maskCacheTexID);
OGLC_UPDATE_TEXTURE_FUNCTION(oglc, GL_MODULATE);
j2d_glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
}
void
OGLVertexCache_DisableMaskCache(OGLContext *oglc)
{
J2dTraceLn(J2D_TRACE_INFO, "OGLVertexCache_DisableMaskCache");
OGLVertexCache_FlushVertexCache();
OGLVertexCache_RestoreColorState(oglc);
j2d_glDisable(GL_TEXTURE_2D);
j2d_glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
j2d_glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
j2d_glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
j2d_glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
maskCacheIndex = 0;
}
void
OGLVertexCache_AddMaskQuad(OGLContext *oglc,
jint srcx, jint srcy,
jint dstx, jint dsty,
jint width, jint height,
jint maskscan, void *mask)
{
jfloat tx1, ty1, tx2, ty2;
jfloat dx1, dy1, dx2, dy2;
J2dTraceLn1(J2D_TRACE_INFO, "OGLVertexCache_AddMaskQuad: %d",
maskCacheIndex);
if (maskCacheIndex >= OGLVC_MASK_CACHE_MAX_INDEX ||
vertexCacheIndex >= OGLVC_MAX_INDEX)
{
OGLVertexCache_FlushVertexCache();
maskCacheIndex = 0;
}
if (mask != NULL) {
jint texx = OGLVC_MASK_CACHE_TILE_WIDTH *
(maskCacheIndex % OGLVC_MASK_CACHE_WIDTH_IN_TILES);
jint texy = OGLVC_MASK_CACHE_TILE_HEIGHT *
(maskCacheIndex / OGLVC_MASK_CACHE_WIDTH_IN_TILES);
// update the source pointer offsets
j2d_glPixelStorei(GL_UNPACK_SKIP_PIXELS, srcx);
j2d_glPixelStorei(GL_UNPACK_SKIP_ROWS, srcy);
j2d_glPixelStorei(GL_UNPACK_ROW_LENGTH, maskscan);
// copy alpha mask into texture tile
j2d_glTexSubImage2D(GL_TEXTURE_2D, 0,
texx, texy, width, height,
GL_LUMINANCE, GL_UNSIGNED_BYTE, mask);
tx1 = ((jfloat)texx) / OGLVC_MASK_CACHE_WIDTH_IN_TEXELS;
ty1 = ((jfloat)texy) / OGLVC_MASK_CACHE_HEIGHT_IN_TEXELS;
maskCacheIndex++;
} else {
// use special fully opaque tile
tx1 = ((jfloat)OGLVC_MASK_CACHE_SPECIAL_TILE_X) /
OGLVC_MASK_CACHE_WIDTH_IN_TEXELS;
ty1 = ((jfloat)OGLVC_MASK_CACHE_SPECIAL_TILE_Y) /
OGLVC_MASK_CACHE_HEIGHT_IN_TEXELS;
}
tx2 = tx1 + (((jfloat)width) / OGLVC_MASK_CACHE_WIDTH_IN_TEXELS);
ty2 = ty1 + (((jfloat)height) / OGLVC_MASK_CACHE_HEIGHT_IN_TEXELS);
dx1 = (jfloat)dstx;
dy1 = (jfloat)dsty;
dx2 = dx1 + width;
dy2 = dy1 + height;
OGLVC_ADD_QUAD(tx1, ty1, tx2, ty2,
dx1, dy1, dx2, dy2,
oglc->r, oglc->g, oglc->b, oglc->a);
}
void
OGLVertexCache_AddGlyphQuad(OGLContext *oglc,
jfloat tx1, jfloat ty1, jfloat tx2, jfloat ty2,
jfloat dx1, jfloat dy1, jfloat dx2, jfloat dy2)
{
J2dTraceLn(J2D_TRACE_INFO, "OGLVertexCache_AddGlyphQuad");
if (vertexCacheIndex >= OGLVC_MAX_INDEX) {
OGLVertexCache_FlushVertexCache();
}
OGLVC_ADD_QUAD(tx1, ty1, tx2, ty2,
dx1, dy1, dx2, dy2,
oglc->r, oglc->g, oglc->b, oglc->a);
}
#endif /* !HEADLESS */