Consolidate GPU buffer implementations
Consolidates all the different buffer implementations into a single
GrBuffer class. This will allow us to add new buffer types, use DSA in
OpenGL, track buffer bindings by unique ID, cache buffers without
respect to the type of data they have been used for previously, etc.
This change is strictly a refactor; it introduces no change in
functionality.
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1825393002
Committed: https://skia.googlesource.com/skia/+/8b1bff29675afd25843439eade634a57f68fe16f
Review URL: https://codereview.chromium.org/1825393002
diff --git a/src/gpu/gl/GrGLBuffer.h b/src/gpu/gl/GrGLBuffer.h
new file mode 100644
index 0000000..90d2c43
--- /dev/null
+++ b/src/gpu/gl/GrGLBuffer.h
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrGLBuffer_DEFINED
+#define GrGLBuffer_DEFINED
+
+#include "GrBuffer.h"
+#include "gl/GrGLTypes.h"
+
+class GrGLGpu;
+class GrGLCaps;
+
+class GrGLBuffer : public GrBuffer {
+public:
+ static GrGLBuffer* Create(GrGLGpu*, GrBufferType, size_t size, GrAccessPattern);
+
+ ~GrGLBuffer() {
+ // either release or abandon should have been called by the owner of this object.
+ SkASSERT(0 == fBufferID);
+ }
+
+ GrGLenum target() const { return fTarget; }
+ GrGLuint bufferID() const { return fBufferID; }
+ size_t baseOffset() const { return reinterpret_cast<size_t>(fCPUData); }
+
+protected:
+ GrGLBuffer(GrGLGpu*, GrBufferType, size_t size, GrAccessPattern, bool cpuBacked);
+
+ void onAbandon() override;
+ void onRelease() override;
+ void setMemoryBacking(SkTraceMemoryDump* traceMemoryDump,
+ const SkString& dumpName) const override;
+
+private:
+ GrGLGpu* glGpu() const;
+ const GrGLCaps& glCaps() const;
+
+ void onMap() override;
+ void onUnmap() override;
+ bool onUpdateData(const void* src, size_t srcSizeInBytes) override;
+
+#ifdef SK_DEBUG
+ void validate() const;
+#endif
+
+ void* fCPUData;
+ GrGLenum fTarget; // GL_ARRAY_BUFFER or GL_ELEMENT_ARRAY_BUFFER, e.g.
+ GrGLuint fBufferID;
+ size_t fSizeInBytes;
+ GrGLenum fUsage;
+ size_t fGLSizeInBytes; // In certain cases we make the size of the GL buffer object
+ // smaller or larger than the size in fDesc.
+
+ typedef GrBuffer INHERITED;
+};
+
+#endif