Temporarily readding SkGrTexturePixelRef.h/.cpp until WebKit is transitioned to SkGrPixelRef
git-svn-id: http://skia.googlecode.com/svn/trunk@4401 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/SkGrTexturePixelRef.cpp b/src/gpu/SkGrTexturePixelRef.cpp
new file mode 100644
index 0000000..cb0343c
--- /dev/null
+++ b/src/gpu/SkGrTexturePixelRef.cpp
@@ -0,0 +1,180 @@
+
+/*
+ * 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 "SkGrTexturePixelRef.h"
+#include "GrContext.h"
+#include "GrTexture.h"
+#include "SkGr.h"
+#include "SkRect.h"
+
+// since we call lockPixels recursively on fBitmap, we need a distinct mutex,
+// to avoid deadlock with the default one provided by SkPixelRef.
+SK_DECLARE_STATIC_MUTEX(gROLockPixelsPixelRefMutex);
+
+SkROLockPixelsPixelRef_Deprecated::SkROLockPixelsPixelRef_Deprecated()
+ : INHERITED(&gROLockPixelsPixelRefMutex) {
+}
+
+SkROLockPixelsPixelRef_Deprecated::~SkROLockPixelsPixelRef_Deprecated() {
+}
+
+void* SkROLockPixelsPixelRef_Deprecated::onLockPixels(SkColorTable** ctable) {
+ if (ctable) {
+ *ctable = NULL;
+ }
+ fBitmap.reset();
+// SkDebugf("---------- calling readpixels in support of lockpixels\n");
+ if (!this->onReadPixels(&fBitmap, NULL)) {
+ SkDebugf("SkROLockPixelsPixelRef::onLockPixels failed!\n");
+ return NULL;
+ }
+ fBitmap.lockPixels();
+ return fBitmap.getPixels();
+}
+
+void SkROLockPixelsPixelRef_Deprecated::onUnlockPixels() {
+ fBitmap.unlockPixels();
+}
+
+bool SkROLockPixelsPixelRef_Deprecated::onLockPixelsAreWritable() const {
+ return false;
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+static SkGrTexturePixelRef* copyToTexturePixelRef(GrTexture* texture,
+ SkBitmap::Config dstConfig) {
+ if (NULL == texture) {
+ return NULL;
+ }
+ GrContext* context = texture->getContext();
+ if (NULL == context) {
+ return NULL;
+ }
+ GrTextureDesc desc;
+
+ desc.fWidth = texture->width();
+ desc.fHeight = texture->height();
+ desc.fFlags = kRenderTarget_GrTextureFlagBit | kNoStencil_GrTextureFlagBit;
+ desc.fConfig = SkGr::BitmapConfig2PixelConfig(dstConfig);
+
+ GrTexture* dst = context->createUncachedTexture(desc, NULL, 0);
+ if (NULL == dst) {
+ return NULL;
+ }
+
+ context->copyTexture(texture, dst->asRenderTarget());
+ SkGrTexturePixelRef* pixelRef = new SkGrTexturePixelRef(dst);
+ GrSafeUnref(dst);
+ return pixelRef;
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+SkGrTexturePixelRef::SkGrTexturePixelRef(GrTexture* tex) {
+ fTexture = tex;
+ GrSafeRef(tex);
+}
+
+SkGrTexturePixelRef::~SkGrTexturePixelRef() {
+ GrSafeUnref(fTexture);
+}
+
+SkGpuTexture* SkGrTexturePixelRef::getTexture() {
+ return (SkGpuTexture*)fTexture;
+}
+
+SkPixelRef* SkGrTexturePixelRef::deepCopy(SkBitmap::Config dstConfig) {
+ return copyToTexturePixelRef(fTexture, dstConfig);
+}
+
+bool SkGrTexturePixelRef::onReadPixels(SkBitmap* dst, const SkIRect* subset) {
+ if (NULL != fTexture && fTexture->isValid()) {
+ int left, top, width, height;
+ if (NULL != subset) {
+ left = subset->fLeft;
+ width = subset->width();
+ top = subset->fTop;
+ height = subset->height();
+ } else {
+ left = 0;
+ width = fTexture->width();
+ top = 0;
+ height = fTexture->height();
+ }
+ dst->setConfig(SkBitmap::kARGB_8888_Config, width, height);
+ dst->allocPixels();
+ SkAutoLockPixels al(*dst);
+ void* buffer = dst->getPixels();
+ return fTexture->readPixels(left, top, width, height,
+ kSkia8888_PM_GrPixelConfig,
+ buffer, dst->rowBytes());
+ } else {
+ return false;
+ }
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+SkGrRenderTargetPixelRef::SkGrRenderTargetPixelRef(GrRenderTarget* rt) {
+ fRenderTarget = rt;
+ GrSafeRef(fRenderTarget);
+}
+
+SkGrRenderTargetPixelRef::~SkGrRenderTargetPixelRef() {
+ GrSafeUnref(fRenderTarget);
+}
+
+SkGpuTexture* SkGrRenderTargetPixelRef::getTexture() {
+ if (NULL != fRenderTarget) {
+ return (SkGpuTexture*) fRenderTarget->asTexture();
+ }
+ return NULL;
+}
+
+SkPixelRef* SkGrRenderTargetPixelRef::deepCopy(SkBitmap::Config dstConfig) {
+ if (NULL == fRenderTarget) {
+ return NULL;
+ }
+ // Note that when copying an SkGrRenderTargetPixelRef, we actually
+ // return an SkGrTexturePixelRef instead. This is because
+ // SkGrRenderTargetPixelRef is usually created in conjunction with
+ // GrTexture owned elsewhere (e.g., SkGpuDevice), and cannot live
+ // independently of that texture. SkGrTexturePixelRef, on the other
+ // hand, owns its own GrTexture, and is thus self-contained.
+ return copyToTexturePixelRef(fRenderTarget->asTexture(), dstConfig);
+}
+
+bool SkGrRenderTargetPixelRef::onReadPixels(SkBitmap* dst, const SkIRect* subset) {
+ if (NULL != fRenderTarget && fRenderTarget->isValid()) {
+ int left, top, width, height;
+ if (NULL != subset) {
+ left = subset->fLeft;
+ width = subset->width();
+ top = subset->fTop;
+ height = subset->height();
+ } else {
+ left = 0;
+ width = fRenderTarget->width();
+ top = 0;
+ height = fRenderTarget->height();
+ }
+ dst->setConfig(SkBitmap::kARGB_8888_Config, width, height);
+ dst->allocPixels();
+ SkAutoLockPixels al(*dst);
+ void* buffer = dst->getPixels();
+ return fRenderTarget->readPixels(left, top, width, height,
+ kSkia8888_PM_GrPixelConfig,
+ buffer, dst->rowBytes());
+ } else {
+ return false;
+ }
+}
+