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Diffstat (limited to 'src/3rdparty/angle/src/libANGLE/VertexAttribute.h')
-rw-r--r-- | src/3rdparty/angle/src/libANGLE/VertexAttribute.h | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/libANGLE/VertexAttribute.h b/src/3rdparty/angle/src/libANGLE/VertexAttribute.h new file mode 100644 index 0000000000..bdffe97466 --- /dev/null +++ b/src/3rdparty/angle/src/libANGLE/VertexAttribute.h @@ -0,0 +1,122 @@ +// +// 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. +// +// Helper structure describing a single vertex attribute +// + +#ifndef LIBANGLE_VERTEXATTRIBUTE_H_ +#define LIBANGLE_VERTEXATTRIBUTE_H_ + +#include "libANGLE/Buffer.h" + +namespace gl +{ + +struct VertexAttribute +{ + bool enabled; // From glEnable/DisableVertexAttribArray + + GLenum type; + GLuint size; + bool normalized; + bool pureInteger; + GLuint stride; // 0 means natural stride + + union + { + const GLvoid *pointer; + GLintptr offset; + }; + BindingPointer<Buffer> buffer; // Captured when glVertexAttribPointer is called. + + GLuint divisor; + + VertexAttribute(); +}; + +bool operator==(const VertexAttribute &a, const VertexAttribute &b); +bool operator!=(const VertexAttribute &a, const VertexAttribute &b); + +template <typename T> +T QuerySingleVertexAttributeParameter(const VertexAttribute& attrib, GLenum pname) +{ + switch (pname) + { + case GL_VERTEX_ATTRIB_ARRAY_ENABLED: + return static_cast<T>(attrib.enabled ? GL_TRUE : GL_FALSE); + case GL_VERTEX_ATTRIB_ARRAY_SIZE: + return static_cast<T>(attrib.size); + case GL_VERTEX_ATTRIB_ARRAY_STRIDE: + return static_cast<T>(attrib.stride); + case GL_VERTEX_ATTRIB_ARRAY_TYPE: + return static_cast<T>(attrib.type); + case GL_VERTEX_ATTRIB_ARRAY_NORMALIZED: + return static_cast<T>(attrib.normalized ? GL_TRUE : GL_FALSE); + case GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING: + return static_cast<T>(attrib.buffer.id()); + case GL_VERTEX_ATTRIB_ARRAY_DIVISOR: + return static_cast<T>(attrib.divisor); + case GL_VERTEX_ATTRIB_ARRAY_INTEGER: + return static_cast<T>(attrib.pureInteger ? GL_TRUE : GL_FALSE); + default: + UNREACHABLE(); + return static_cast<T>(0); + } +} + +size_t ComputeVertexAttributeTypeSize(const VertexAttribute& attrib); +size_t ComputeVertexAttributeStride(const VertexAttribute& attrib); + +struct VertexAttribCurrentValueData +{ + union + { + GLfloat FloatValues[4]; + GLint IntValues[4]; + GLuint UnsignedIntValues[4]; + }; + GLenum Type; + + void setFloatValues(const GLfloat floatValues[4]) + { + for (unsigned int valueIndex = 0; valueIndex < 4; valueIndex++) + { + FloatValues[valueIndex] = floatValues[valueIndex]; + } + Type = GL_FLOAT; + } + + void setIntValues(const GLint intValues[4]) + { + for (unsigned int valueIndex = 0; valueIndex < 4; valueIndex++) + { + IntValues[valueIndex] = intValues[valueIndex]; + } + Type = GL_INT; + } + + void setUnsignedIntValues(const GLuint unsignedIntValues[4]) + { + for (unsigned int valueIndex = 0; valueIndex < 4; valueIndex++) + { + UnsignedIntValues[valueIndex] = unsignedIntValues[valueIndex]; + } + Type = GL_UNSIGNED_INT; + } + + bool operator==(const VertexAttribCurrentValueData &other) + { + return (Type == other.Type && memcmp(FloatValues, other.FloatValues, sizeof(float) * 4) == 0); + } + + bool operator!=(const VertexAttribCurrentValueData &other) + { + return !(*this == other); + } +}; + +} + +#endif // LIBANGLE_VERTEXATTRIBUTE_H_ |