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-rw-r--r--src/3rdparty/angle/src/libGLESv2/renderer/copyvertex.h309
1 files changed, 309 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/libGLESv2/renderer/copyvertex.h b/src/3rdparty/angle/src/libGLESv2/renderer/copyvertex.h
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index 0000000000..aca031701e
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+++ b/src/3rdparty/angle/src/libGLESv2/renderer/copyvertex.h
@@ -0,0 +1,309 @@
+//
+// Copyright (c) 2013 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.
+//
+
+// copyvertex.h: Defines vertex buffer copying and conversion functions
+
+#ifndef LIBGLESV2_RENDERER_COPYVERTEX_H_
+#define LIBGLESV2_RENDERER_COPYVERTEX_H_
+
+#include "common/mathutil.h"
+
+// 'widenDefaultValueBits' gives the default value for the alpha channel (4th component)
+// the sentinel value 0 means we do not want to widen the input or add an alpha channel
+template <typename T, unsigned int componentCount, unsigned int widenDefaultValueBits>
+inline void copyVertexData(const void *input, size_t stride, size_t count, void *output)
+{
+ const unsigned int attribSize = sizeof(T) * componentCount;
+ const T defaultValue = gl::bitCast<T>(widenDefaultValueBits);
+ const bool widen = (widenDefaultValueBits != 0);
+
+ if (attribSize == stride && !widen)
+ {
+ memcpy(output, input, count * attribSize);
+ }
+ else
+ {
+ unsigned int outputStride = widen ? 4 : componentCount;
+
+ for (unsigned int i = 0; i < count; i++)
+ {
+ const T *offsetInput = reinterpret_cast<const T*>(reinterpret_cast<const char*>(input) + i * stride);
+ T *offsetOutput = reinterpret_cast<T*>(output) + i * outputStride;
+
+ for (unsigned int j = 0; j < componentCount; j++)
+ {
+ offsetOutput[j] = offsetInput[j];
+ }
+
+ if (widen)
+ {
+ offsetOutput[3] = defaultValue;
+ }
+ }
+ }
+}
+
+template <unsigned int componentCount>
+inline void copyFixedVertexData(const void* input, size_t stride, size_t count, void* output)
+{
+ static const float divisor = 1.0f / (1 << 16);
+
+ for (unsigned int i = 0; i < count; i++)
+ {
+ const GLfixed* offsetInput = reinterpret_cast<const GLfixed*>(reinterpret_cast<const char*>(input) + stride * i);
+ float* offsetOutput = reinterpret_cast<float*>(output) + i * componentCount;
+
+ for (unsigned int j = 0; j < componentCount; j++)
+ {
+ offsetOutput[j] = static_cast<float>(offsetInput[j]) * divisor;
+ }
+ }
+}
+
+template <typename T, unsigned int componentCount, bool normalized>
+inline void copyToFloatVertexData(const void* input, size_t stride, size_t count, void* output)
+{
+ typedef std::numeric_limits<T> NL;
+
+ for (unsigned int i = 0; i < count; i++)
+ {
+ const T *offsetInput = reinterpret_cast<const T*>(reinterpret_cast<const char*>(input) + stride * i);
+ float *offsetOutput = reinterpret_cast<float*>(output) + i * componentCount;
+
+ for (unsigned int j = 0; j < componentCount; j++)
+ {
+ if (normalized)
+ {
+ if (NL::is_signed)
+ {
+ const float divisor = 1.0f / (2 * static_cast<float>(NL::max()) + 1);
+ offsetOutput[j] = (2 * static_cast<float>(offsetInput[j]) + 1) * divisor;
+ }
+ else
+ {
+ offsetOutput[j] = static_cast<float>(offsetInput[j]) / NL::max();
+ }
+ }
+ else
+ {
+ offsetOutput[j] = static_cast<float>(offsetInput[j]);
+ }
+ }
+ }
+}
+
+inline void copyPackedUnsignedVertexData(const void* input, size_t stride, size_t count, void* output)
+{
+ const unsigned int attribSize = 4;
+
+ if (attribSize == stride)
+ {
+ memcpy(output, input, count * attribSize);
+ }
+ else
+ {
+ for (unsigned int i = 0; i < count; i++)
+ {
+ const GLuint *offsetInput = reinterpret_cast<const GLuint*>(reinterpret_cast<const char*>(input) + (i * stride));
+ GLuint *offsetOutput = reinterpret_cast<GLuint*>(output) + (i * attribSize);
+
+ offsetOutput[i] = offsetInput[i];
+ }
+ }
+}
+
+template <bool isSigned, bool normalized, bool toFloat>
+static inline void copyPackedRGB(unsigned int data, void *output)
+{
+ const unsigned int rgbSignMask = 0x200; // 1 set at the 9 bit
+ const unsigned int negativeMask = 0xFFFFFC00; // All bits from 10 to 31 set to 1
+
+ if (toFloat)
+ {
+ GLfloat *floatOutput = reinterpret_cast<GLfloat*>(output);
+ if (isSigned)
+ {
+ GLfloat finalValue = 0;
+ if (data & rgbSignMask)
+ {
+ int negativeNumber = data | negativeMask;
+ finalValue = static_cast<GLfloat>(negativeNumber);
+ }
+ else
+ {
+ finalValue = static_cast<GLfloat>(data);
+ }
+
+ if (normalized)
+ {
+ const int maxValue = 0x1FF; // 1 set in bits 0 through 8
+ const int minValue = 0xFFFFFE01; // Inverse of maxValue
+
+ // A 10-bit two's complement number has the possibility of being minValue - 1 but
+ // OpenGL's normalization rules dictate that it should be clamped to minValue in this
+ // case.
+ if (finalValue < minValue)
+ {
+ finalValue = minValue;
+ }
+
+ const int halfRange = (maxValue - minValue) >> 1;
+ *floatOutput = ((finalValue - minValue) / halfRange) - 1.0f;
+ }
+ else
+ {
+ *floatOutput = finalValue;
+ }
+ }
+ else
+ {
+ if (normalized)
+ {
+ const unsigned int maxValue = 0x3FF; // 1 set in bits 0 through 9
+ *floatOutput = static_cast<GLfloat>(data) / static_cast<GLfloat>(maxValue);
+ }
+ else
+ {
+ *floatOutput = static_cast<GLfloat>(data);
+ }
+ }
+ }
+ else
+ {
+ if (isSigned)
+ {
+ GLshort *intOutput = reinterpret_cast<GLshort*>(output);
+
+ if (data & rgbSignMask)
+ {
+ *intOutput = data | negativeMask;
+ }
+ else
+ {
+ *intOutput = data;
+ }
+ }
+ else
+ {
+ GLushort *uintOutput = reinterpret_cast<GLushort*>(output);
+ *uintOutput = data;
+ }
+ }
+}
+
+template <bool isSigned, bool normalized, bool toFloat>
+inline void copyPackedAlpha(unsigned int data, void *output)
+{
+ if (toFloat)
+ {
+ GLfloat *floatOutput = reinterpret_cast<GLfloat*>(output);
+ if (isSigned)
+ {
+ if (normalized)
+ {
+ switch (data)
+ {
+ case 0x0: *floatOutput = 0.0f; break;
+ case 0x1: *floatOutput = 1.0f; break;
+ case 0x2: *floatOutput = -1.0f; break;
+ case 0x3: *floatOutput = -1.0f; break;
+ default: UNREACHABLE();
+ }
+ }
+ else
+ {
+ switch (data)
+ {
+ case 0x0: *floatOutput = 0.0f; break;
+ case 0x1: *floatOutput = 1.0f; break;
+ case 0x2: *floatOutput = -2.0f; break;
+ case 0x3: *floatOutput = -1.0f; break;
+ default: UNREACHABLE();
+ }
+ }
+ }
+ else
+ {
+ if (normalized)
+ {
+ switch (data)
+ {
+ case 0x0: *floatOutput = 0.0f / 3.0f; break;
+ case 0x1: *floatOutput = 1.0f / 3.0f; break;
+ case 0x2: *floatOutput = 2.0f / 3.0f; break;
+ case 0x3: *floatOutput = 3.0f / 3.0f; break;
+ default: UNREACHABLE();
+ }
+ }
+ else
+ {
+ switch (data)
+ {
+ case 0x0: *floatOutput = 0.0f; break;
+ case 0x1: *floatOutput = 1.0f; break;
+ case 0x2: *floatOutput = 2.0f; break;
+ case 0x3: *floatOutput = 3.0f; break;
+ default: UNREACHABLE();
+ }
+ }
+ }
+ }
+ else
+ {
+ if (isSigned)
+ {
+ GLshort *intOutput = reinterpret_cast<GLshort*>(output);
+ switch (data)
+ {
+ case 0x0: *intOutput = 0; break;
+ case 0x1: *intOutput = 1; break;
+ case 0x2: *intOutput = -2; break;
+ case 0x3: *intOutput = -1; break;
+ default: UNREACHABLE();
+ }
+ }
+ else
+ {
+ GLushort *uintOutput = reinterpret_cast<GLushort*>(output);
+ switch (data)
+ {
+ case 0x0: *uintOutput = 0; break;
+ case 0x1: *uintOutput = 1; break;
+ case 0x2: *uintOutput = 2; break;
+ case 0x3: *uintOutput = 3; break;
+ default: UNREACHABLE();
+ }
+ }
+ }
+}
+
+template <bool isSigned, bool normalized, bool toFloat>
+inline void copyPackedVertexData(const void* input, size_t stride, size_t count, void* output)
+{
+ const unsigned int outputComponentSize = toFloat ? 4 : 2;
+ const unsigned int componentCount = 4;
+
+ const unsigned int rgbMask = 0x3FF; // 1 set in bits 0 through 9
+ const unsigned int redShift = 0; // red is bits 0 through 9
+ const unsigned int greenShift = 10; // green is bits 10 through 19
+ const unsigned int blueShift = 20; // blue is bits 20 through 29
+
+ const unsigned int alphaMask = 0x3; // 1 set in bits 0 and 1
+ const unsigned int alphaShift = 30; // Alpha is the 30 and 31 bits
+
+ for (unsigned int i = 0; i < count; i++)
+ {
+ GLuint packedValue = *reinterpret_cast<const GLuint*>(reinterpret_cast<const char*>(input) + (i * stride));
+ GLbyte *offsetOutput = reinterpret_cast<GLbyte*>(output) + (i * outputComponentSize * componentCount);
+
+ copyPackedRGB<isSigned, normalized, toFloat>( (packedValue >> redShift) & rgbMask, offsetOutput + (0 * outputComponentSize));
+ copyPackedRGB<isSigned, normalized, toFloat>( (packedValue >> greenShift) & rgbMask, offsetOutput + (1 * outputComponentSize));
+ copyPackedRGB<isSigned, normalized, toFloat>( (packedValue >> blueShift) & rgbMask, offsetOutput + (2 * outputComponentSize));
+ copyPackedAlpha<isSigned, normalized, toFloat>((packedValue >> alphaShift) & alphaMask, offsetOutput + (3* outputComponentSize));
+ }
+}
+
+#endif // LIBGLESV2_RENDERER_COPYVERTEX_H_
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