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/*
* Copyright 2010 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrAtlas.h"
#include "GrContext.h"
#include "GrGpu.h"
#include "GrRectanizer.h"
#include "GrPlotMgr.h"
#if 0
#define GR_PLOT_WIDTH 8
#define GR_PLOT_HEIGHT 4
#define GR_ATLAS_WIDTH 256
#define GR_ATLAS_HEIGHT 256
#define GR_ATLAS_TEXTURE_WIDTH (GR_PLOT_WIDTH * GR_ATLAS_WIDTH)
#define GR_ATLAS_TEXTURE_HEIGHT (GR_PLOT_HEIGHT * GR_ATLAS_HEIGHT)
#else
#define GR_ATLAS_TEXTURE_WIDTH 1024
#define GR_ATLAS_TEXTURE_HEIGHT 2048
#define GR_ATLAS_WIDTH 341
#define GR_ATLAS_HEIGHT 341
#define GR_PLOT_WIDTH (GR_ATLAS_TEXTURE_WIDTH / GR_ATLAS_WIDTH)
#define GR_PLOT_HEIGHT (GR_ATLAS_TEXTURE_HEIGHT / GR_ATLAS_HEIGHT)
#endif
///////////////////////////////////////////////////////////////////////////////
#define BORDER 1
#if GR_DEBUG
static int gCounter;
#endif
GrAtlas::GrAtlas(GrAtlasMgr* mgr, int plotX, int plotY, GrMaskFormat format) {
fAtlasMgr = mgr; // just a pointer, not an owner
fNext = NULL;
fTexture = mgr->getTexture(format); // we're not an owner, just a pointer
fPlot.set(plotX, plotY);
fRects = GrRectanizer::Factory(GR_ATLAS_WIDTH - BORDER,
GR_ATLAS_HEIGHT - BORDER);
fMaskFormat = format;
#if GR_DEBUG
// GrPrintf(" GrAtlas %p [%d %d] %d\n", this, plotX, plotY, gCounter);
gCounter += 1;
#endif
}
GrAtlas::~GrAtlas() {
fAtlasMgr->freePlot(fPlot.fX, fPlot.fY);
delete fRects;
#if GR_DEBUG
--gCounter;
// GrPrintf("~GrAtlas %p [%d %d] %d\n", this, fPlot.fX, fPlot.fY, gCounter);
#endif
}
static void adjustForPlot(GrIPoint16* loc, const GrIPoint16& plot) {
loc->fX += plot.fX * GR_ATLAS_WIDTH;
loc->fY += plot.fY * GR_ATLAS_HEIGHT;
}
static uint8_t* zerofill(uint8_t* ptr, int count) {
while (--count >= 0) {
*ptr++ = 0;
}
return ptr;
}
bool GrAtlas::addSubImage(int width, int height, const void* image,
GrIPoint16* loc) {
if (!fRects->addRect(width + BORDER, height + BORDER, loc)) {
return false;
}
SkAutoSMalloc<1024> storage;
int dstW = width + 2*BORDER;
int dstH = height + 2*BORDER;
if (BORDER) {
const int bpp = GrMaskFormatBytesPerPixel(fMaskFormat);
const size_t dstRB = dstW * bpp;
uint8_t* dst = (uint8_t*)storage.reset(dstH * dstRB);
Gr_bzero(dst, dstRB); // zero top row
dst += dstRB;
for (int y = 0; y < height; y++) {
dst = zerofill(dst, bpp); // zero left edge
memcpy(dst, image, width * bpp);
dst += width * bpp;
dst = zerofill(dst, bpp); // zero right edge
image = (const void*)((const char*)image + width * bpp);
}
Gr_bzero(dst, dstRB); // zero bottom row
image = storage.get();
}
adjustForPlot(loc, fPlot);
GrContext* context = fTexture->getContext();
// We call the internal version so that we don't force a flush. We assume
// our caller is smart and hasn't referenced the part of the texture we're
// about to update since the last flush.
context->internalWriteTexturePixels(fTexture, loc->fX, loc->fY,
dstW, dstH, fTexture->config(),
image, 0,
GrContext::kDontFlush_PixelOpsFlag);
// now tell the caller to skip the top/left BORDER
loc->fX += BORDER;
loc->fY += BORDER;
return true;
}
///////////////////////////////////////////////////////////////////////////////
GrAtlasMgr::GrAtlasMgr(GrGpu* gpu) {
fGpu = gpu;
gpu->ref();
Gr_bzero(fTexture, sizeof(fTexture));
fPlotMgr = new GrPlotMgr(GR_PLOT_WIDTH, GR_PLOT_HEIGHT);
}
GrAtlasMgr::~GrAtlasMgr() {
for (size_t i = 0; i < GR_ARRAY_COUNT(fTexture); i++) {
GrSafeUnref(fTexture[i]);
}
delete fPlotMgr;
fGpu->unref();
}
static GrPixelConfig maskformat2pixelconfig(GrMaskFormat format) {
switch (format) {
case kA8_GrMaskFormat:
return kAlpha_8_GrPixelConfig;
case kA565_GrMaskFormat:
return kRGB_565_GrPixelConfig;
case kA888_GrMaskFormat:
return kSkia8888_PM_GrPixelConfig;
default:
GrAssert(!"unknown maskformat");
}
return kUnknown_GrPixelConfig;
}
GrAtlas* GrAtlasMgr::addToAtlas(GrAtlas* atlas,
int width, int height, const void* image,
GrMaskFormat format,
GrIPoint16* loc) {
GrAssert(NULL == atlas || atlas->getMaskFormat() == format);
if (atlas && atlas->addSubImage(width, height, image, loc)) {
return atlas;
}
// If the above fails, then either we have no starting atlas, or the current
// one is full. Either way we need to allocate a new atlas
GrIPoint16 plot;
if (!fPlotMgr->newPlot(&plot)) {
return NULL;
}
GrAssert(0 == kA8_GrMaskFormat);
GrAssert(1 == kA565_GrMaskFormat);
if (NULL == fTexture[format]) {
GrTextureDesc desc = {
kDynamicUpdate_GrTextureFlagBit,
kNone_GrAALevel,
GR_ATLAS_TEXTURE_WIDTH,
GR_ATLAS_TEXTURE_HEIGHT,
maskformat2pixelconfig(format)
};
fTexture[format] = fGpu->createTexture(desc, NULL, 0);
if (NULL == fTexture[format]) {
return NULL;
}
}
GrAtlas* newAtlas = new GrAtlas(this, plot.fX, plot.fY, format);
if (!newAtlas->addSubImage(width, height, image, loc)) {
delete newAtlas;
return NULL;
}
newAtlas->fNext = atlas;
return newAtlas;
}
void GrAtlasMgr::freePlot(int x, int y) {
GrAssert(fPlotMgr->isBusy(x, y));
fPlotMgr->freePlot(x, y);
}
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