Minor changes to GrFontCache system

src/gpu/GrAtlas.cpp

 
 /*
  * 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"
 
-#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  256
-#define GR_ATLAS_HEIGHT 256
-
-#define GR_PLOT_WIDTH   (GR_ATLAS_TEXTURE_WIDTH / GR_ATLAS_WIDTH)
-#define GR_PLOT_HEIGHT  (GR_ATLAS_TEXTURE_HEIGHT / GR_ATLAS_HEIGHT)
-
-#endif
-
 ///////////////////////////////////////////////////////////////////////////////
 
 // for testing
 #define FONT_CACHE_STATS 0
 #if FONT_CACHE_STATS
 static int g_UploadCount = 0;
 #endif
 
 GrPlot::GrPlot() : fDrawToken(NULL, 0)
                  , fTexture(NULL)
+                 , fRects(NULL)
                  , fAtlasMgr(NULL)
                  , fBytesPerPixel(1)
 {
-    fRects = GrRectanizer::Factory(GR_ATLAS_WIDTH,
-                                   GR_ATLAS_HEIGHT);
     fOffset.set(0, 0);
 }
 
 GrPlot::~GrPlot() {
     delete fRects;
 }
 
+void GrPlot::init(GrAtlasMgr* mgr, int offX, int offY, int width, int height, size_t bpp) {
+    fRects = GrRectanizer::Factory(width, height);
+    fAtlasMgr = mgr;
+    fOffset.set(offX * width, offY * height);
+    fBytesPerPixel = bpp;
+}
+
 static inline void adjust_for_offset(GrIPoint16* loc, const GrIPoint16& offset) {
-    loc->fX += offset.fX * GR_ATLAS_WIDTH;
-    loc->fY += offset.fY * GR_ATLAS_HEIGHT;
+    loc->fX += offset.fX;
+    loc->fY += offset.fY;
 }
 
 bool GrPlot::addSubImage(int width, int height, const void* image,
                           GrIPoint16* loc) {
     if (!fRects->addRect(width, height, loc)) {
         return false;
     }
 
     SkAutoSMalloc<1024> storage;
     adjust_for_offset(loc, fOffset);
@@ skipping 13 matching lines @@
     return true;
 }
 
 void GrPlot::resetRects() {
     SkASSERT(NULL != fRects);
     fRects->reset();
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
-GrAtlasMgr::GrAtlasMgr(GrGpu* gpu, GrPixelConfig config) {
-    fGpu = gpu;
+GrAtlasMgr::GrAtlasMgr(GrGpu* gpu, GrPixelConfig config, 
+                       const SkISize& backingTextureSize,
+                       int numPlotsX, int numPlotsY) {
+    fGpu = SkRef(gpu);
     fPixelConfig = config;
-    gpu->ref();
+    fBackingTextureSize = backingTextureSize;
+    fNumPlotsX = numPlotsX;
+    fNumPlotsY = numPlotsY;
     fTexture = NULL;
 
+    int plotWidth = fBackingTextureSize.width() / fNumPlotsX;
+    int plotHeight = fBackingTextureSize.height() / fNumPlotsY;
+
+    SkASSERT(plotWidth * fNumPlotsX == fBackingTextureSize.width());
+    SkASSERT(plotHeight * fNumPlotsY == fBackingTextureSize.height());
+
     // set up allocated plots
     size_t bpp = GrBytesPerPixel(fPixelConfig);
-    fPlotArray = SkNEW_ARRAY(GrPlot, (GR_PLOT_WIDTH*GR_PLOT_HEIGHT));
+    fPlotArray = SkNEW_ARRAY(GrPlot, (fNumPlotsX*fNumPlotsY));
 
     GrPlot* currPlot = fPlotArray;
-    for (int y = GR_PLOT_HEIGHT-1; y >= 0; --y) {
-        for (int x = GR_PLOT_WIDTH-1; x >= 0; --x) {
-            currPlot->fAtlasMgr = this;
-            currPlot->fOffset.set(x, y);
-            currPlot->fBytesPerPixel = bpp;
+    for (int y = numPlotsY-1; y >= 0; --y) {
+        for (int x = numPlotsX-1; x >= 0; --x) {
+            currPlot->init(this, x, y, plotWidth, plotHeight, bpp);
 
             // build LRU list
             fPlotList.addToHead(currPlot);
             ++currPlot;
         }
     }
 }
 
 GrAtlasMgr::~GrAtlasMgr() {
     SkSafeUnref(fTexture);
@@ skipping 25 matching lines @@
             this->moveToHead(plot);
             return plot;
         }
     }
 
     // before we get a new plot, make sure we have a backing texture
     if (NULL == fTexture) {
         // TODO: Update this to use the cache rather than directly creating a texture.
         GrTextureDesc desc;
         desc.fFlags = kDynamicUpdate_GrTextureFlagBit;
-        desc.fWidth = GR_ATLAS_TEXTURE_WIDTH;
-        desc.fHeight = GR_ATLAS_TEXTURE_HEIGHT;
+        desc.fWidth = fBackingTextureSize.width();
+        desc.fHeight = fBackingTextureSize.height();
         desc.fConfig = fPixelConfig;
 
         fTexture = fGpu->createTexture(desc, NULL, 0);
         if (NULL == fTexture) {
             return NULL;
         }
     }
 
     // now look through all allocated plots for one we can share, in MRU order
     GrPlotList::Iter plotIter;
@@ skipping 35 matching lines @@
     GrPlot* plot;
     while (NULL != (plot = plotIter.get())) {
         if (plot->drawToken().isIssued()) {
             return plot;
         }
         plotIter.prev();
     }
 
     return NULL;
 }