diff options
Diffstat (limited to 'Source/ThirdParty/ANGLE/src/libGLESv2/utilities.cpp')
| -rw-r--r-- | Source/ThirdParty/ANGLE/src/libGLESv2/utilities.cpp | 674 |
1 files changed, 674 insertions, 0 deletions
diff --git a/Source/ThirdParty/ANGLE/src/libGLESv2/utilities.cpp b/Source/ThirdParty/ANGLE/src/libGLESv2/utilities.cpp new file mode 100644 index 0000000..7fc2bc4 --- /dev/null +++ b/Source/ThirdParty/ANGLE/src/libGLESv2/utilities.cpp @@ -0,0 +1,674 @@ +// +// Copyright (c) 2002-2010 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. +// + +// utilities.cpp: Conversion functions and other utility routines. + +#include "libGLESv2/utilities.h" + +#include <limits> + +#include "common/debug.h" + +#include "libGLESv2/mathutil.h" +#include "libGLESv2/Context.h" + +namespace gl +{ + +int UniformComponentCount(GLenum type) +{ + switch (type) + { + case GL_BOOL: + case GL_FLOAT: + case GL_INT: + return 1; + case GL_BOOL_VEC2: + case GL_FLOAT_VEC2: + case GL_INT_VEC2: + return 2; + case GL_INT_VEC3: + case GL_FLOAT_VEC3: + case GL_BOOL_VEC3: + return 3; + case GL_BOOL_VEC4: + case GL_FLOAT_VEC4: + case GL_INT_VEC4: + case GL_FLOAT_MAT2: + return 4; + case GL_FLOAT_MAT3: + return 9; + case GL_FLOAT_MAT4: + return 16; + default: + UNREACHABLE(); + } + + return 0; +} + +GLenum UniformComponentType(GLenum type) +{ + switch(type) + { + case GL_BOOL: + case GL_BOOL_VEC2: + case GL_BOOL_VEC3: + case GL_BOOL_VEC4: + return GL_BOOL; + case GL_FLOAT: + case GL_FLOAT_VEC2: + case GL_FLOAT_VEC3: + case GL_FLOAT_VEC4: + case GL_FLOAT_MAT2: + case GL_FLOAT_MAT3: + case GL_FLOAT_MAT4: + return GL_FLOAT; + case GL_INT: + case GL_INT_VEC2: + case GL_INT_VEC3: + case GL_INT_VEC4: + return GL_INT; + default: + UNREACHABLE(); + } + + return GL_NONE; +} + +size_t UniformTypeSize(GLenum type) +{ + switch(type) + { + case GL_BOOL: return sizeof(GLboolean); + case GL_FLOAT: return sizeof(GLfloat); + case GL_INT: return sizeof(GLint); + } + + return UniformTypeSize(UniformComponentType(type)) * UniformComponentCount(type); +} + +int VariableRowCount(GLenum type) +{ + switch (type) + { + case GL_NONE: + return 0; + case GL_BOOL: + case GL_FLOAT: + case GL_INT: + case GL_BOOL_VEC2: + case GL_FLOAT_VEC2: + case GL_INT_VEC2: + case GL_INT_VEC3: + case GL_FLOAT_VEC3: + case GL_BOOL_VEC3: + case GL_BOOL_VEC4: + case GL_FLOAT_VEC4: + case GL_INT_VEC4: + return 1; + case GL_FLOAT_MAT2: + return 2; + case GL_FLOAT_MAT3: + return 3; + case GL_FLOAT_MAT4: + return 4; + default: + UNREACHABLE(); + } + + return 0; +} + +int VariableColumnCount(GLenum type) +{ + switch (type) + { + case GL_NONE: + return 0; + case GL_BOOL: + case GL_FLOAT: + case GL_INT: + return 1; + case GL_BOOL_VEC2: + case GL_FLOAT_VEC2: + case GL_INT_VEC2: + case GL_FLOAT_MAT2: + return 2; + case GL_INT_VEC3: + case GL_FLOAT_VEC3: + case GL_BOOL_VEC3: + case GL_FLOAT_MAT3: + return 3; + case GL_BOOL_VEC4: + case GL_FLOAT_VEC4: + case GL_INT_VEC4: + case GL_FLOAT_MAT4: + return 4; + default: + UNREACHABLE(); + } + + return 0; +} + +int AllocateFirstFreeBits(unsigned int *bits, unsigned int allocationSize, unsigned int bitsSize) +{ + ASSERT(allocationSize <= bitsSize); + + unsigned int mask = std::numeric_limits<unsigned int>::max() >> (std::numeric_limits<unsigned int>::digits - allocationSize); + + for (unsigned int i = 0; i < bitsSize - allocationSize + 1; i++) + { + if ((*bits & mask) == 0) + { + *bits |= mask; + return i; + } + + mask <<= 1; + } + + return -1; +} + +GLsizei ComputePitch(GLsizei width, GLenum format, GLenum type, GLint alignment) +{ + ASSERT(alignment > 0 && isPow2(alignment)); + + GLsizei rawPitch = ComputePixelSize(format, type) * width; + return (rawPitch + alignment - 1) & ~(alignment - 1); +} + +GLsizei ComputeCompressedPitch(GLsizei width, GLenum format) +{ + switch (format) + { + case GL_COMPRESSED_RGB_S3TC_DXT1_EXT: + case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT: + break; + default: + return 0; + } + + ASSERT(width % 4 == 0); + + return 8 * width / 4; +} + +GLsizei ComputeCompressedSize(GLsizei width, GLsizei height, GLenum format) +{ + switch (format) + { + case GL_COMPRESSED_RGB_S3TC_DXT1_EXT: + case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT: + break; + default: + return 0; + } + + return 8 * (GLsizei)ceil((float)width / 4.0f) * (GLsizei)ceil((float)height / 4.0f); +} + +bool IsCompressed(GLenum format) +{ + if(format == GL_COMPRESSED_RGB_S3TC_DXT1_EXT || + format == GL_COMPRESSED_RGBA_S3TC_DXT1_EXT) + { + return true; + } + else + { + return false; + } +} + +// Returns the size, in bytes, of a single texel in an Image +int ComputePixelSize(GLenum format, GLenum type) +{ + switch (type) + { + case GL_UNSIGNED_BYTE: + switch (format) + { + case GL_ALPHA: return sizeof(unsigned char); + case GL_LUMINANCE: return sizeof(unsigned char); + case GL_LUMINANCE_ALPHA: return sizeof(unsigned char) * 2; + case GL_RGB: return sizeof(unsigned char) * 3; + case GL_RGBA: return sizeof(unsigned char) * 4; + case GL_BGRA_EXT: return sizeof(unsigned char) * 4; + default: UNREACHABLE(); + } + break; + case GL_UNSIGNED_SHORT_4_4_4_4: + case GL_UNSIGNED_SHORT_5_5_5_1: + case GL_UNSIGNED_SHORT_5_6_5: + return sizeof(unsigned short); + default: UNREACHABLE(); + } + + return 0; +} + +bool IsCubemapTextureTarget(GLenum target) +{ + return (target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X && target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z); +} + +bool IsTextureTarget(GLenum target) +{ + return target == GL_TEXTURE_2D || IsCubemapTextureTarget(target); +} + +// Verify that format/type are one of the combinations from table 3.4. +bool CheckTextureFormatType(GLenum format, GLenum type) +{ + switch (type) + { + case GL_UNSIGNED_BYTE: + switch (format) + { + case GL_RGBA: + case GL_BGRA_EXT: + case GL_RGB: + case GL_ALPHA: + case GL_LUMINANCE: + case GL_LUMINANCE_ALPHA: + return true; + + default: + return false; + } + + case GL_UNSIGNED_SHORT_4_4_4_4: + case GL_UNSIGNED_SHORT_5_5_5_1: + return (format == GL_RGBA); + + case GL_UNSIGNED_SHORT_5_6_5: + return (format == GL_RGB); + + default: + return false; + } +} + +} + +namespace es2dx +{ + +D3DCMPFUNC ConvertComparison(GLenum comparison) +{ + D3DCMPFUNC d3dComp = D3DCMP_ALWAYS; + switch (comparison) + { + case GL_NEVER: d3dComp = D3DCMP_NEVER; break; + case GL_ALWAYS: d3dComp = D3DCMP_ALWAYS; break; + case GL_LESS: d3dComp = D3DCMP_LESS; break; + case GL_LEQUAL: d3dComp = D3DCMP_LESSEQUAL; break; + case GL_EQUAL: d3dComp = D3DCMP_EQUAL; break; + case GL_GREATER: d3dComp = D3DCMP_GREATER; break; + case GL_GEQUAL: d3dComp = D3DCMP_GREATEREQUAL; break; + case GL_NOTEQUAL: d3dComp = D3DCMP_NOTEQUAL; break; + default: UNREACHABLE(); + } + + return d3dComp; +} + +D3DCOLOR ConvertColor(gl::Color color) +{ + return D3DCOLOR_RGBA(gl::unorm<8>(color.red), + gl::unorm<8>(color.green), + gl::unorm<8>(color.blue), + gl::unorm<8>(color.alpha)); +} + +D3DBLEND ConvertBlendFunc(GLenum blend) +{ + D3DBLEND d3dBlend = D3DBLEND_ZERO; + + switch (blend) + { + case GL_ZERO: d3dBlend = D3DBLEND_ZERO; break; + case GL_ONE: d3dBlend = D3DBLEND_ONE; break; + case GL_SRC_COLOR: d3dBlend = D3DBLEND_SRCCOLOR; break; + case GL_ONE_MINUS_SRC_COLOR: d3dBlend = D3DBLEND_INVSRCCOLOR; break; + case GL_DST_COLOR: d3dBlend = D3DBLEND_DESTCOLOR; break; + case GL_ONE_MINUS_DST_COLOR: d3dBlend = D3DBLEND_INVDESTCOLOR; break; + case GL_SRC_ALPHA: d3dBlend = D3DBLEND_SRCALPHA; break; + case GL_ONE_MINUS_SRC_ALPHA: d3dBlend = D3DBLEND_INVSRCALPHA; break; + case GL_DST_ALPHA: d3dBlend = D3DBLEND_DESTALPHA; break; + case GL_ONE_MINUS_DST_ALPHA: d3dBlend = D3DBLEND_INVDESTALPHA; break; + case GL_CONSTANT_COLOR: d3dBlend = D3DBLEND_BLENDFACTOR; break; + case GL_ONE_MINUS_CONSTANT_COLOR: d3dBlend = D3DBLEND_INVBLENDFACTOR; break; + case GL_CONSTANT_ALPHA: d3dBlend = D3DBLEND_BLENDFACTOR; break; + case GL_ONE_MINUS_CONSTANT_ALPHA: d3dBlend = D3DBLEND_INVBLENDFACTOR; break; + case GL_SRC_ALPHA_SATURATE: d3dBlend = D3DBLEND_SRCALPHASAT; break; + default: UNREACHABLE(); + } + + return d3dBlend; +} + +D3DBLENDOP ConvertBlendOp(GLenum blendOp) +{ + D3DBLENDOP d3dBlendOp = D3DBLENDOP_ADD; + + switch (blendOp) + { + case GL_FUNC_ADD: d3dBlendOp = D3DBLENDOP_ADD; break; + case GL_FUNC_SUBTRACT: d3dBlendOp = D3DBLENDOP_SUBTRACT; break; + case GL_FUNC_REVERSE_SUBTRACT: d3dBlendOp = D3DBLENDOP_REVSUBTRACT; break; + default: UNREACHABLE(); + } + + return d3dBlendOp; +} + +D3DSTENCILOP ConvertStencilOp(GLenum stencilOp) +{ + D3DSTENCILOP d3dStencilOp = D3DSTENCILOP_KEEP; + + switch (stencilOp) + { + case GL_ZERO: d3dStencilOp = D3DSTENCILOP_ZERO; break; + case GL_KEEP: d3dStencilOp = D3DSTENCILOP_KEEP; break; + case GL_REPLACE: d3dStencilOp = D3DSTENCILOP_REPLACE; break; + case GL_INCR: d3dStencilOp = D3DSTENCILOP_INCRSAT; break; + case GL_DECR: d3dStencilOp = D3DSTENCILOP_DECRSAT; break; + case GL_INVERT: d3dStencilOp = D3DSTENCILOP_INVERT; break; + case GL_INCR_WRAP: d3dStencilOp = D3DSTENCILOP_INCR; break; + case GL_DECR_WRAP: d3dStencilOp = D3DSTENCILOP_DECR; break; + default: UNREACHABLE(); + } + + return d3dStencilOp; +} + +D3DTEXTUREADDRESS ConvertTextureWrap(GLenum wrap) +{ + D3DTEXTUREADDRESS d3dWrap = D3DTADDRESS_WRAP; + + switch (wrap) + { + case GL_REPEAT: d3dWrap = D3DTADDRESS_WRAP; break; + case GL_CLAMP_TO_EDGE: d3dWrap = D3DTADDRESS_CLAMP; break; + case GL_MIRRORED_REPEAT: d3dWrap = D3DTADDRESS_MIRROR; break; + default: UNREACHABLE(); + } + + return d3dWrap; +} + +D3DCULL ConvertCullMode(GLenum cullFace, GLenum frontFace) +{ + D3DCULL cull = D3DCULL_CCW; + switch (cullFace) + { + case GL_FRONT: + cull = (frontFace == GL_CCW ? D3DCULL_CW : D3DCULL_CCW); + break; + case GL_BACK: + cull = (frontFace == GL_CCW ? D3DCULL_CCW : D3DCULL_CW); + break; + case GL_FRONT_AND_BACK: + cull = D3DCULL_NONE; // culling will be handled during draw + break; + default: UNREACHABLE(); + } + + return cull; +} + +DWORD ConvertColorMask(bool red, bool green, bool blue, bool alpha) +{ + return (red ? D3DCOLORWRITEENABLE_RED : 0) | + (green ? D3DCOLORWRITEENABLE_GREEN : 0) | + (blue ? D3DCOLORWRITEENABLE_BLUE : 0) | + (alpha ? D3DCOLORWRITEENABLE_ALPHA : 0); +} + +D3DTEXTUREFILTERTYPE ConvertMagFilter(GLenum magFilter) +{ + D3DTEXTUREFILTERTYPE d3dMagFilter = D3DTEXF_POINT; + switch (magFilter) + { + case GL_NEAREST: d3dMagFilter = D3DTEXF_POINT; break; + case GL_LINEAR: d3dMagFilter = D3DTEXF_LINEAR; break; + default: UNREACHABLE(); + } + + return d3dMagFilter; +} + +void ConvertMinFilter(GLenum minFilter, D3DTEXTUREFILTERTYPE *d3dMinFilter, D3DTEXTUREFILTERTYPE *d3dMipFilter) +{ + switch (minFilter) + { + case GL_NEAREST: + *d3dMinFilter = D3DTEXF_POINT; + *d3dMipFilter = D3DTEXF_NONE; + break; + case GL_LINEAR: + *d3dMinFilter = D3DTEXF_LINEAR; + *d3dMipFilter = D3DTEXF_NONE; + break; + case GL_NEAREST_MIPMAP_NEAREST: + *d3dMinFilter = D3DTEXF_POINT; + *d3dMipFilter = D3DTEXF_POINT; + break; + case GL_LINEAR_MIPMAP_NEAREST: + *d3dMinFilter = D3DTEXF_LINEAR; + *d3dMipFilter = D3DTEXF_POINT; + break; + case GL_NEAREST_MIPMAP_LINEAR: + *d3dMinFilter = D3DTEXF_POINT; + *d3dMipFilter = D3DTEXF_LINEAR; + break; + case GL_LINEAR_MIPMAP_LINEAR: + *d3dMinFilter = D3DTEXF_LINEAR; + *d3dMipFilter = D3DTEXF_LINEAR; + break; + default: + *d3dMinFilter = D3DTEXF_POINT; + *d3dMipFilter = D3DTEXF_NONE; + UNREACHABLE(); + } +} + +unsigned int GetStencilSize(D3DFORMAT stencilFormat) +{ + switch(stencilFormat) + { + case D3DFMT_D24FS8: + case D3DFMT_D24S8: + return 8; + case D3DFMT_D24X4S4: + return 4; + case D3DFMT_D15S1: + return 1; + case D3DFMT_D16_LOCKABLE: + case D3DFMT_D32: + case D3DFMT_D24X8: + case D3DFMT_D32F_LOCKABLE: + case D3DFMT_D16: + return 0; +// case D3DFMT_D32_LOCKABLE: return 0; // DirectX 9Ex only +// case D3DFMT_S8_LOCKABLE: return 8; // DirectX 9Ex only + default: UNREACHABLE(); + } + return 0; +} + +unsigned int GetAlphaSize(D3DFORMAT colorFormat) +{ + switch (colorFormat) + { + case D3DFMT_A2R10G10B10: + return 2; + case D3DFMT_A8R8G8B8: + return 8; + case D3DFMT_A1R5G5B5: + return 1; + case D3DFMT_X8R8G8B8: + case D3DFMT_X1R5G5B5: + case D3DFMT_R5G6B5: + return 0; + default: UNREACHABLE(); + } + return 0; +} + +unsigned int GetRedSize(D3DFORMAT colorFormat) +{ + switch (colorFormat) + { + case D3DFMT_A2R10G10B10: + return 10; + case D3DFMT_A8R8G8B8: + case D3DFMT_X8R8G8B8: + return 8; + case D3DFMT_A1R5G5B5: + case D3DFMT_R5G6B5: + case D3DFMT_X1R5G5B5: + return 5; + default: UNREACHABLE(); + } + return 0; +} + +unsigned int GetGreenSize(D3DFORMAT colorFormat) +{ + switch (colorFormat) + { + case D3DFMT_A2R10G10B10: + return 10; + case D3DFMT_A8R8G8B8: + case D3DFMT_X8R8G8B8: + return 8; + case D3DFMT_A1R5G5B5: + case D3DFMT_X1R5G5B5: + return 5; + case D3DFMT_R5G6B5: + return 6; + default: UNREACHABLE(); + } + return 0; +} + +unsigned int GetBlueSize(D3DFORMAT colorFormat) +{ + switch (colorFormat) + { + case D3DFMT_A2R10G10B10: + return 10; + case D3DFMT_A8R8G8B8: + case D3DFMT_X8R8G8B8: + return 8; + case D3DFMT_A1R5G5B5: + case D3DFMT_R5G6B5: + case D3DFMT_X1R5G5B5: + return 5; + default: UNREACHABLE(); + } + return 0; +} + +unsigned int GetDepthSize(D3DFORMAT depthFormat) +{ + switch (depthFormat) + { + case D3DFMT_D16_LOCKABLE: return 16; + case D3DFMT_D32: return 32; + case D3DFMT_D15S1: return 15; + case D3DFMT_D24S8: return 24; + case D3DFMT_D24X8: return 24; + case D3DFMT_D24X4S4: return 24; + case D3DFMT_D16: return 16; + case D3DFMT_D32F_LOCKABLE: return 32; + case D3DFMT_D24FS8: return 24; +// case D3DFMT_D32_LOCKABLE: return 32; // D3D9Ex only +// case D3DFMT_S8_LOCKABLE: return 0; // D3D9Ex only + default: + UNREACHABLE(); + } + return 0; +} + +bool ConvertPrimitiveType(GLenum primitiveType, GLsizei primitiveCount, + D3DPRIMITIVETYPE *d3dPrimitiveType, int *d3dPrimitiveCount) +{ + switch (primitiveType) + { + case GL_POINTS: + *d3dPrimitiveType = D3DPT_POINTLIST; + *d3dPrimitiveCount = primitiveCount; + break; + case GL_LINES: + *d3dPrimitiveType = D3DPT_LINELIST; + *d3dPrimitiveCount = primitiveCount / 2; + break; + case GL_LINE_LOOP: + *d3dPrimitiveType = D3DPT_LINESTRIP; + *d3dPrimitiveCount = primitiveCount; + break; + case GL_LINE_STRIP: + *d3dPrimitiveType = D3DPT_LINESTRIP; + *d3dPrimitiveCount = primitiveCount - 1; + break; + case GL_TRIANGLES: + *d3dPrimitiveType = D3DPT_TRIANGLELIST; + *d3dPrimitiveCount = primitiveCount / 3; + break; + case GL_TRIANGLE_STRIP: + *d3dPrimitiveType = D3DPT_TRIANGLESTRIP; + *d3dPrimitiveCount = primitiveCount - 2; + break; + case GL_TRIANGLE_FAN: + *d3dPrimitiveType = D3DPT_TRIANGLEFAN; + *d3dPrimitiveCount = primitiveCount - 2; + break; + default: + return false; + } + + return true; +} + +D3DFORMAT ConvertRenderbufferFormat(GLenum format) +{ + switch (format) + { + case GL_RGBA4: + case GL_RGB5_A1: + case GL_RGBA8_OES: return D3DFMT_A8R8G8B8; + case GL_RGB565: return D3DFMT_R5G6B5; + case GL_RGB8_OES: return D3DFMT_X8R8G8B8; + case GL_DEPTH_COMPONENT16: + case GL_STENCIL_INDEX8: + case GL_DEPTH24_STENCIL8_OES: return D3DFMT_D24S8; + default: UNREACHABLE(); return D3DFMT_A8R8G8B8; + } +} + +GLsizei GetSamplesFromMultisampleType(D3DMULTISAMPLE_TYPE type) +{ + if (type == D3DMULTISAMPLE_NONMASKABLE) + return 0; + else + return type; +} + +D3DMULTISAMPLE_TYPE GetMultisampleTypeFromSamples(GLsizei samples) +{ + if (samples <= 1) + return D3DMULTISAMPLE_NONE; + else + return (D3DMULTISAMPLE_TYPE)samples; +} + +} |