commit d2b50a0b4909c74b057997293f6496cd8aeb24d3
author Jamie Madill <jmadill@chromium.org> Thu Jun 09 00:13:35 2016 -0700
committer Commit Bot <commit-bot@chromium.org> Thu Jun 09 11:36:34 2016 +0000
tree 0336f3067bbf8414a8980f6aa1ce7675cac25c2f
parent 6e4d1d21f702319414b9d0c45c5f3ea6ead54526

Move ReadPixels logic to helper methods.

These routines were pretty much duplicated between D3D9 and D3D11.
Since I was going to have to rewrite them again for Vulkan, I
figured it would be best to move them into a common location and
clean them up a bit.

BUG=angleproject:1319

Change-Id: I15d39b052daf3e1020dbd0880f01ae84f3686a0a
Reviewed-on: https://chromium-review.googlesource.com/349630
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

src/libANGLE/renderer/renderer_utils.h

diff --git a/src/libANGLE/renderer/renderer_utils.h b/src/libANGLE/renderer/renderer_utils.h
new file mode 100644
index 0000000..c95292e
--- /dev/null
+++ b/src/libANGLE/renderer/renderer_utils.h
@@ -0,0 +1,67 @@
+//
+// Copyright 2016 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// renderer_utils:
+//   Helper methods pertaining to most or all back-ends.
+//
+
+#ifndef LIBANGLE_RENDERER_RENDERER_UTILS_H_
+#define LIBANGLE_RENDERER_RENDERER_UTILS_H_
+
+#include <cstdint>
+
+#include <map>
+
+#include "libANGLE/angletypes.h"
+
+namespace gl
+{
+struct FormatType;
+struct InternalFormat;
+}
+
+namespace rx
+{
+
+typedef void (*ColorReadFunction)(const uint8_t *source, uint8_t *dest);
+typedef void (*ColorWriteFunction)(const uint8_t *source, uint8_t *dest);
+typedef void (*ColorCopyFunction)(const uint8_t *source, uint8_t *dest);
+
+typedef std::map<gl::FormatType, ColorCopyFunction> FastCopyFunctionMap;
+
+struct PackPixelsParams
+{
+    PackPixelsParams();
+    PackPixelsParams(const gl::Rectangle &area,
+                     GLenum format,
+                     GLenum type,
+                     GLuint outputPitch,
+                     const gl::PixelPackState &pack,
+                     ptrdiff_t offset);
+
+    gl::Rectangle area;
+    GLenum format;
+    GLenum type;
+    GLuint outputPitch;
+    gl::Buffer *packBuffer;
+    gl::PixelPackState pack;
+    ptrdiff_t offset;
+};
+
+void PackPixels(const PackPixelsParams &params,
+                const gl::InternalFormat &sourceFormatInfo,
+                const FastCopyFunctionMap &fastCopyFunctionsMap,
+                ColorReadFunction colorReadFunction,
+                int inputPitch,
+                const uint8_t *source,
+                uint8_t *destination);
+
+ColorWriteFunction GetColorWriteFunction(const gl::FormatType &formatType);
+ColorCopyFunction GetFastCopyFunction(const FastCopyFunctionMap &fastCopyFunctions,
+                                      const gl::FormatType &formatType);
+
+}  // namespace rx
+
+#endif  // LIBANGLE_RENDERER_RENDERER_UTILS_H_