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>
diff --git a/src/libANGLE/renderer/renderer_utils.cpp b/src/libANGLE/renderer/renderer_utils.cpp
new file mode 100644
index 0000000..ea6fee7
--- /dev/null
+++ b/src/libANGLE/renderer/renderer_utils.cpp
@@ -0,0 +1,264 @@
+//
+// 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.
+//
+
+#include "libANGLE/renderer/renderer_utils.h"
+
+#include "libANGLE/formatutils.h"
+#include "libANGLE/renderer/copyimage.h"
+#include "libANGLE/renderer/imageformats.h"
+
+namespace rx
+{
+
+namespace
+{
+typedef std::pair<gl::FormatType, ColorWriteFunction> FormatWriteFunctionPair;
+typedef std::map<gl::FormatType, ColorWriteFunction> FormatWriteFunctionMap;
+
+static inline void InsertFormatWriteFunctionMapping(FormatWriteFunctionMap *map,
+ GLenum format,
+ GLenum type,
+ ColorWriteFunction writeFunc)
+{
+ map->insert(FormatWriteFunctionPair(gl::FormatType(format, type), writeFunc));
+}
+
+static FormatWriteFunctionMap BuildFormatWriteFunctionMap()
+{
+ FormatWriteFunctionMap map;
+
+ // clang-format off
+ // | Format | Type | Color write function |
+ InsertFormatWriteFunctionMapping(&map, GL_RGBA, GL_UNSIGNED_BYTE, WriteColor<R8G8B8A8, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_RGBA, GL_BYTE, WriteColor<R8G8B8A8S, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4, WriteColor<R4G4B4A4, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1, WriteColor<R5G5B5A1, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV, WriteColor<R10G10B10A2, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_RGBA, GL_FLOAT, WriteColor<R32G32B32A32F, GLfloat>);
+ InsertFormatWriteFunctionMapping(&map, GL_RGBA, GL_HALF_FLOAT, WriteColor<R16G16B16A16F, GLfloat>);
+ InsertFormatWriteFunctionMapping(&map, GL_RGBA, GL_HALF_FLOAT_OES, WriteColor<R16G16B16A16F, GLfloat>);
+ InsertFormatWriteFunctionMapping(&map, GL_RGBA, GL_UNSIGNED_SHORT,
+ WriteColor<R16G16B16A16, GLfloat>);
+ InsertFormatWriteFunctionMapping(&map, GL_RGBA, GL_SHORT, WriteColor<R16G16B16A16S, GLfloat>);
+
+ InsertFormatWriteFunctionMapping(&map, GL_RGBA_INTEGER, GL_UNSIGNED_BYTE, WriteColor<R8G8B8A8, GLuint> );
+ InsertFormatWriteFunctionMapping(&map, GL_RGBA_INTEGER, GL_BYTE, WriteColor<R8G8B8A8S, GLint> );
+ InsertFormatWriteFunctionMapping(&map, GL_RGBA_INTEGER, GL_UNSIGNED_SHORT, WriteColor<R16G16B16A16, GLuint> );
+ InsertFormatWriteFunctionMapping(&map, GL_RGBA_INTEGER, GL_SHORT, WriteColor<R16G16B16A16S, GLint> );
+ InsertFormatWriteFunctionMapping(&map, GL_RGBA_INTEGER, GL_UNSIGNED_INT, WriteColor<R32G32B32A32, GLuint> );
+ InsertFormatWriteFunctionMapping(&map, GL_RGBA_INTEGER, GL_INT, WriteColor<R32G32B32A32S, GLint> );
+ InsertFormatWriteFunctionMapping(&map, GL_RGBA_INTEGER, GL_UNSIGNED_INT_2_10_10_10_REV, WriteColor<R10G10B10A2, GLuint> );
+
+ InsertFormatWriteFunctionMapping(&map, GL_RGB, GL_UNSIGNED_BYTE, WriteColor<R8G8B8, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_RGB, GL_BYTE, WriteColor<R8G8B8S, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, WriteColor<R5G6B5, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_RGB, GL_UNSIGNED_INT_10F_11F_11F_REV, WriteColor<R11G11B10F, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_RGB, GL_UNSIGNED_INT_5_9_9_9_REV, WriteColor<R9G9B9E5, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_RGB, GL_FLOAT, WriteColor<R32G32B32F, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_RGB, GL_HALF_FLOAT, WriteColor<R16G16B16F, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_RGB, GL_HALF_FLOAT_OES, WriteColor<R16G16B16F, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_RGB, GL_UNSIGNED_SHORT,
+ WriteColor<R16G16B16, GLfloat>);
+ InsertFormatWriteFunctionMapping(&map, GL_RGB, GL_SHORT, WriteColor<R16G16B16S, GLfloat>);
+
+ InsertFormatWriteFunctionMapping(&map, GL_RGB_INTEGER, GL_UNSIGNED_BYTE, WriteColor<R8G8B8, GLuint> );
+ InsertFormatWriteFunctionMapping(&map, GL_RGB_INTEGER, GL_BYTE, WriteColor<R8G8B8S, GLint> );
+ InsertFormatWriteFunctionMapping(&map, GL_RGB_INTEGER, GL_UNSIGNED_SHORT, WriteColor<R16G16B16, GLuint> );
+ InsertFormatWriteFunctionMapping(&map, GL_RGB_INTEGER, GL_SHORT, WriteColor<R16G16B16S, GLint> );
+ InsertFormatWriteFunctionMapping(&map, GL_RGB_INTEGER, GL_UNSIGNED_INT, WriteColor<R32G32B32, GLuint> );
+ InsertFormatWriteFunctionMapping(&map, GL_RGB_INTEGER, GL_INT, WriteColor<R32G32B32S, GLint> );
+
+ InsertFormatWriteFunctionMapping(&map, GL_RG, GL_UNSIGNED_BYTE, WriteColor<R8G8, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_RG, GL_BYTE, WriteColor<R8G8S, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_RG, GL_FLOAT, WriteColor<R32G32F, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_RG, GL_HALF_FLOAT, WriteColor<R16G16F, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_RG, GL_HALF_FLOAT_OES, WriteColor<R16G16F, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_RG, GL_UNSIGNED_SHORT, WriteColor<R16G16, GLfloat>);
+ InsertFormatWriteFunctionMapping(&map, GL_RG, GL_SHORT, WriteColor<R16G16S, GLfloat>);
+
+ InsertFormatWriteFunctionMapping(&map, GL_RG_INTEGER, GL_UNSIGNED_BYTE, WriteColor<R8G8, GLuint> );
+ InsertFormatWriteFunctionMapping(&map, GL_RG_INTEGER, GL_BYTE, WriteColor<R8G8S, GLint> );
+ InsertFormatWriteFunctionMapping(&map, GL_RG_INTEGER, GL_UNSIGNED_SHORT, WriteColor<R16G16, GLuint> );
+ InsertFormatWriteFunctionMapping(&map, GL_RG_INTEGER, GL_SHORT, WriteColor<R16G16S, GLint> );
+ InsertFormatWriteFunctionMapping(&map, GL_RG_INTEGER, GL_UNSIGNED_INT, WriteColor<R32G32, GLuint> );
+ InsertFormatWriteFunctionMapping(&map, GL_RG_INTEGER, GL_INT, WriteColor<R32G32S, GLint> );
+
+ InsertFormatWriteFunctionMapping(&map, GL_RED, GL_UNSIGNED_BYTE, WriteColor<R8, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_RED, GL_BYTE, WriteColor<R8S, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_RED, GL_FLOAT, WriteColor<R32F, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_RED, GL_HALF_FLOAT, WriteColor<R16F, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_RED, GL_HALF_FLOAT_OES, WriteColor<R16F, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_RED, GL_UNSIGNED_SHORT, WriteColor<R16, GLfloat>);
+ InsertFormatWriteFunctionMapping(&map, GL_RED, GL_SHORT, WriteColor<R16S, GLfloat>);
+
+ InsertFormatWriteFunctionMapping(&map, GL_RED_INTEGER, GL_UNSIGNED_BYTE, WriteColor<R8, GLuint> );
+ InsertFormatWriteFunctionMapping(&map, GL_RED_INTEGER, GL_BYTE, WriteColor<R8S, GLint> );
+ InsertFormatWriteFunctionMapping(&map, GL_RED_INTEGER, GL_UNSIGNED_SHORT, WriteColor<R16, GLuint> );
+ InsertFormatWriteFunctionMapping(&map, GL_RED_INTEGER, GL_SHORT, WriteColor<R16S, GLint> );
+ InsertFormatWriteFunctionMapping(&map, GL_RED_INTEGER, GL_UNSIGNED_INT, WriteColor<R32, GLuint> );
+ InsertFormatWriteFunctionMapping(&map, GL_RED_INTEGER, GL_INT, WriteColor<R32S, GLint> );
+
+ InsertFormatWriteFunctionMapping(&map, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, WriteColor<L8A8, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_LUMINANCE, GL_UNSIGNED_BYTE, WriteColor<L8, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_ALPHA, GL_UNSIGNED_BYTE, WriteColor<A8, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_LUMINANCE_ALPHA, GL_FLOAT, WriteColor<L32A32F, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_LUMINANCE, GL_FLOAT, WriteColor<L32F, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_ALPHA, GL_FLOAT, WriteColor<A32F, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_LUMINANCE_ALPHA, GL_HALF_FLOAT, WriteColor<L16A16F, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_LUMINANCE_ALPHA, GL_HALF_FLOAT_OES, WriteColor<L16A16F, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_LUMINANCE, GL_HALF_FLOAT, WriteColor<L16F, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_LUMINANCE, GL_HALF_FLOAT_OES, WriteColor<L16F, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_ALPHA, GL_HALF_FLOAT, WriteColor<A16F, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_ALPHA, GL_HALF_FLOAT_OES, WriteColor<A16F, GLfloat> );
+
+ InsertFormatWriteFunctionMapping(&map, GL_BGRA_EXT, GL_UNSIGNED_BYTE, WriteColor<B8G8R8A8, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_BGRA_EXT, GL_UNSIGNED_SHORT_4_4_4_4_REV_EXT, WriteColor<A4R4G4B4, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_BGRA_EXT, GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT, WriteColor<A1R5G5B5, GLfloat> );
+
+ InsertFormatWriteFunctionMapping(&map, GL_SRGB_EXT, GL_UNSIGNED_BYTE, WriteColor<R8G8B8, GLfloat> );
+ InsertFormatWriteFunctionMapping(&map, GL_SRGB_ALPHA_EXT, GL_UNSIGNED_BYTE, WriteColor<R8G8B8A8, GLfloat> );
+
+ InsertFormatWriteFunctionMapping(&map, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, GL_UNSIGNED_BYTE, NULL );
+ InsertFormatWriteFunctionMapping(&map, GL_COMPRESSED_RGBA_S3TC_DXT1_EXT, GL_UNSIGNED_BYTE, NULL );
+ InsertFormatWriteFunctionMapping(&map, GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE, GL_UNSIGNED_BYTE, NULL );
+ InsertFormatWriteFunctionMapping(&map, GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE, GL_UNSIGNED_BYTE, NULL );
+
+ InsertFormatWriteFunctionMapping(&map, GL_DEPTH_COMPONENT, GL_UNSIGNED_SHORT, NULL );
+ InsertFormatWriteFunctionMapping(&map, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, NULL );
+ InsertFormatWriteFunctionMapping(&map, GL_DEPTH_COMPONENT, GL_FLOAT, NULL );
+
+ InsertFormatWriteFunctionMapping(&map, GL_STENCIL, GL_UNSIGNED_BYTE, NULL );
+
+ InsertFormatWriteFunctionMapping(&map, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, NULL );
+ InsertFormatWriteFunctionMapping(&map, GL_DEPTH_STENCIL, GL_FLOAT_32_UNSIGNED_INT_24_8_REV, NULL );
+ // clang-format on
+
+ return map;
+}
+} // anonymous namespace
+
+PackPixelsParams::PackPixelsParams()
+ : format(GL_NONE), type(GL_NONE), outputPitch(0), packBuffer(nullptr), offset(0)
+{
+}
+
+PackPixelsParams::PackPixelsParams(const gl::Rectangle &areaIn,
+ GLenum formatIn,
+ GLenum typeIn,
+ GLuint outputPitchIn,
+ const gl::PixelPackState &packIn,
+ ptrdiff_t offsetIn)
+ : area(areaIn),
+ format(formatIn),
+ type(typeIn),
+ outputPitch(outputPitchIn),
+ packBuffer(packIn.pixelBuffer.get()),
+ pack(packIn.alignment, packIn.reverseRowOrder),
+ offset(offsetIn)
+{
+}
+
+void PackPixels(const PackPixelsParams ¶ms,
+ const gl::InternalFormat &sourceFormatInfo,
+ const FastCopyFunctionMap &fastCopyFunctionsMap,
+ ColorReadFunction colorReadFunction,
+ int inputPitchIn,
+ const uint8_t *sourceIn,
+ uint8_t *destWithoutOffset)
+{
+ uint8_t *destWithOffset = destWithoutOffset + params.offset;
+
+ const uint8_t *source = sourceIn;
+ int inputPitch = inputPitchIn;
+
+ if (params.pack.reverseRowOrder)
+ {
+ source += inputPitch * (params.area.height - 1);
+ inputPitch = -inputPitch;
+ }
+
+ if (sourceFormatInfo.format == params.format && sourceFormatInfo.type == params.type)
+ {
+ // Direct copy possible
+ for (int y = 0; y < params.area.height; ++y)
+ {
+ memcpy(destWithOffset + y * params.outputPitch, source + y * inputPitch,
+ params.area.width * sourceFormatInfo.pixelBytes);
+ }
+ return;
+ }
+
+ gl::FormatType formatType(params.format, params.type);
+ ColorCopyFunction fastCopyFunc = GetFastCopyFunction(fastCopyFunctionsMap, formatType);
+ GLenum sizedDestInternalFormat = gl::GetSizedInternalFormat(formatType.format, formatType.type);
+ const auto &destFormatInfo = gl::GetInternalFormatInfo(sizedDestInternalFormat);
+
+ if (fastCopyFunc)
+ {
+ // Fast copy is possible through some special function
+ for (int y = 0; y < params.area.height; ++y)
+ {
+ for (int x = 0; x < params.area.width; ++x)
+ {
+ uint8_t *dest =
+ destWithOffset + y * params.outputPitch + x * destFormatInfo.pixelBytes;
+ const uint8_t *src = source + y * inputPitch + x * sourceFormatInfo.pixelBytes;
+
+ fastCopyFunc(src, dest);
+ }
+ }
+ return;
+ }
+
+ ColorWriteFunction colorWriteFunction = GetColorWriteFunction(formatType);
+
+ // Maximum size of any Color<T> type used.
+ uint8_t temp[16];
+ static_assert(sizeof(temp) >= sizeof(gl::ColorF) && sizeof(temp) >= sizeof(gl::ColorUI) &&
+ sizeof(temp) >= sizeof(gl::ColorI),
+ "Unexpected size of gl::Color struct.");
+
+ for (int y = 0; y < params.area.height; ++y)
+ {
+ for (int x = 0; x < params.area.width; ++x)
+ {
+ uint8_t *dest = destWithOffset + y * params.outputPitch + x * destFormatInfo.pixelBytes;
+ const uint8_t *src = source + y * inputPitch + x * sourceFormatInfo.pixelBytes;
+
+ // readFunc and writeFunc will be using the same type of color, CopyTexImage
+ // will not allow the copy otherwise.
+ colorReadFunction(src, temp);
+ colorWriteFunction(temp, dest);
+ }
+ }
+}
+
+ColorWriteFunction GetColorWriteFunction(const gl::FormatType &formatType)
+{
+ static const FormatWriteFunctionMap formatTypeMap = BuildFormatWriteFunctionMap();
+ auto iter = formatTypeMap.find(formatType);
+ ASSERT(iter != formatTypeMap.end());
+ if (iter != formatTypeMap.end())
+ {
+ return iter->second;
+ }
+ else
+ {
+ return nullptr;
+ }
+}
+
+ColorCopyFunction GetFastCopyFunction(const FastCopyFunctionMap &fastCopyFunctions,
+ const gl::FormatType &formatType)
+{
+ auto iter = fastCopyFunctions.find(formatType);
+ return (iter != fastCopyFunctions.end()) ? iter->second : nullptr;
+}
+
+} // namespace rx