##########################################################################
#
# Copyright 2011 Jose Fonseca
# All Rights Reserved.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
##########################################################################/


'''Describe GL types.'''


import platform

from .stdapi import *


GLboolean = Enum("GLboolean", [
    "GL_TRUE",
    "GL_FALSE",
])

GLvoid = Alias("GLvoid", Void)
GLbyte = Alias("GLbyte", SChar)
GLshort = Alias("GLshort", Short)
GLint = Alias("GLint", Int)
GLint64 = Alias("GLint64", Int64)
GLubyte = Alias("GLubyte", UChar)
GLushort = Alias("GLushort", UShort)
GLuint = Alias("GLuint", UInt)
GLuint64 = Alias("GLuint64", UInt64)
GLsizei = Alias("GLsizei", Int)
GLintptr = Alias("GLintptr", Int)
GLsizeiptr = Alias("GLsizeiptr", Int)
GLfloat = Alias("GLfloat", Float)
GLclampf = Alias("GLclampf", Float)
GLdouble = Alias("GLdouble", Double)
GLclampd = Alias("GLclampd", Double)
GLchar = Alias("GLchar", Char)

GLfixed = Alias("GLfixed", Int32)
GLclampx = Alias("GLclampx", Int32)

GLcharARB = Alias("GLcharARB", SChar)
GLintptrARB = Alias("GLintptrARB", Int)
GLsizeiptrARB = Alias("GLsizeiptrARB", Int)
GLhandleARB = Handle("handleARB", Alias("GLhandleARB", UInt))
GLhalfARB = Alias("GLhalfARB", UShort)
GLhalfNV = Alias("GLhalfNV", UShort)
GLint64EXT = Alias("GLint64EXT", Int64)
GLuint64EXT = Alias("GLuint64EXT", UInt64)
GLDEBUGPROC = Opaque("GLDEBUGPROC")
GLDEBUGPROCKHR = Opaque("GLDEBUGPROCKHR")
GLDEBUGPROCARB = Opaque("GLDEBUGPROCARB")
GLDEBUGPROCAMD = Opaque("GLDEBUGPROCAMD")

GLstring = String(GLchar)
GLstringConst = String(Const(GLchar))
GLstringARB = String(GLcharARB)
GLstringConstARB = String(Const(GLcharARB))

GLpointer = OpaquePointer(GLvoid)
GLpointerConst = OpaquePointer(Const(GLvoid))

GLlist = Handle("list", GLuint)
GLtexture = Handle("texture", GLuint)
GLbuffer = Handle("buffer", GLuint)
GLquery = Handle("query", GLuint)
GLfenceNV = Handle("fenceNV", GLuint)
GLprogram = Handle("program", GLuint)
GLshader = Handle("shader", GLuint)

# Share the same mapping table for uniform locations of both core and
# GL_ARB_shader_objects programs.  For a combination of reasons:
#
# - all OpenGL implementations appear to alias the names for both kind of
#   programs;
#
# - most applications will use only one kind of shader programs;
#
# - some applications actually mix glUniformXxx calls with
#   GL_ARB_shader_objects programs and glUniformXxxARB calls with core
#   programs, and therefore, rely on a joint implementation.
#
# We use GLhandleARB as program key, since it is wider (void *) on MacOSX.
#
GLlocation = Handle("location", GLint, key=('program', GLhandleARB))
GLlocationARB = Handle("location", GLint, key=('programObj', GLhandleARB))

# TODO: Symbolic representation of GL_INVALID_INDEX
GLuniformBlock = Handle("uniformBlock", GLuint, key=('program', GLprogram))

contextKey = ('reinterpret_cast<uintptr_t>(glretrace::getCurrentContext())', UIntPtr)

GLprogramARB = Handle("programARB", GLuint)
GLframebuffer = Handle("framebuffer", GLuint)
GLrenderbuffer = Handle("renderbuffer", GLuint)
GLfragmentShaderATI = Handle("fragmentShaderATI", GLuint)
GLarray = Handle("array", GLuint, key=contextKey) # per-context
GLarrayAPPLE = Handle("arrayAPPLE", GLuint) # shared
GLregion = Handle("region", GLuint)
GLpipeline = Handle("pipeline", GLuint)
GLsampler = Handle("sampler", GLuint)
GLfeedback = Handle("feedback", GLuint)
GLfence = Handle("fence", GLuint)
GLhandle = Handle("handle", GLuint64)
GLsubroutine = Handle("subroutine", GLuint, key=('program', GLhandleARB))
GLeglImageOES = Handle("eglImageOES", IntPointer("GLeglImageOES"))


# GL mappings are pointers to linear memory regions.
#
# The map length is not always available in the function prototype, and must be
# reconstructed from other state.
GLmap = LinearPointer(GLvoid, "length")

GLsync = Handle("sync", IntPointer("GLsync"))

GLenum = Enum("GLenum", [
    # Parameters are added later from glparams.py's parameter table
])

# Some functions take GLenum disguised as GLint, and need special treatment so
# that symbolic names are traced correctly.
GLenum_int = Alias("GLint", GLenum)

def GLarray_int(values):
    return AttribArray(Const(GLenum_int), values, terminator = 'GL_NONE')

GLenum_mode = FakeEnum(GLenum, [
    "GL_POINTS",                         # 0x0000
    "GL_LINES",                          # 0x0001
    "GL_LINE_LOOP",                      # 0x0002
    "GL_LINE_STRIP",                     # 0x0003
    "GL_TRIANGLES",                      # 0x0004
    "GL_TRIANGLE_STRIP",                 # 0x0005
    "GL_TRIANGLE_FAN",                   # 0x0006
    "GL_QUADS",                          # 0x0007
    "GL_QUAD_STRIP",                     # 0x0008
    "GL_POLYGON",                        # 0x0009
    "GL_LINES_ADJACENCY",                # 0x000A
    "GL_LINE_STRIP_ADJACENCY",           # 0x000B
    "GL_TRIANGLES_ADJACENCY",            # 0x000C
    "GL_TRIANGLE_STRIP_ADJACENCY",       # 0x000D
    "GL_PATCHES",                        # 0x000E
])

GLenum_error = FakeEnum(GLenum, [
    "GL_NO_ERROR",                       # 0x0
    "GL_INVALID_ENUM",                   # 0x0500
    "GL_INVALID_VALUE",                  # 0x0501
    "GL_INVALID_OPERATION",              # 0x0502
    "GL_STACK_OVERFLOW",                 # 0x0503
    "GL_STACK_UNDERFLOW",                # 0x0504
    "GL_OUT_OF_MEMORY",                  # 0x0505
    "GL_INVALID_FRAMEBUFFER_OPERATION",  # 0x0506
    "GL_TABLE_TOO_LARGE",                # 0x8031
])

GLenum_region = FakeEnum(GLenum, [
    "GL_KTX_FRONT_REGION",
    "GL_KTX_BACK_REGION",
    "GL_KTX_Z_REGION",
    "GL_KTX_STENCIL_REGION",
])

GLbitfield = Alias("GLbitfield", UInt)

GLbitfield_attrib = Flags(GLbitfield, [
    "GL_ALL_ATTRIB_BITS",     # 0x000FFFFF
    "GL_CURRENT_BIT",         # 0x00000001
    "GL_POINT_BIT",           # 0x00000002
    "GL_LINE_BIT",            # 0x00000004
    "GL_POLYGON_BIT",         # 0x00000008
    "GL_POLYGON_STIPPLE_BIT", # 0x00000010
    "GL_PIXEL_MODE_BIT",      # 0x00000020
    "GL_LIGHTING_BIT",        # 0x00000040
    "GL_FOG_BIT",             # 0x00000080
    "GL_DEPTH_BUFFER_BIT",    # 0x00000100
    "GL_ACCUM_BUFFER_BIT",    # 0x00000200
    "GL_STENCIL_BUFFER_BIT",  # 0x00000400
    "GL_VIEWPORT_BIT",        # 0x00000800
    "GL_TRANSFORM_BIT",       # 0x00001000
    "GL_ENABLE_BIT",          # 0x00002000
    "GL_COLOR_BUFFER_BIT",    # 0x00004000
    "GL_HINT_BIT",            # 0x00008000
    "GL_EVAL_BIT",            # 0x00010000
    "GL_LIST_BIT",            # 0x00020000
    "GL_TEXTURE_BIT",         # 0x00040000
    "GL_SCISSOR_BIT",         # 0x00080000
    "GL_MULTISAMPLE_BIT",     # 0x20000000
])

GLbitfield_client_attrib = Flags(GLbitfield, [
    "GL_CLIENT_ALL_ATTRIB_BITS",  # 0xFFFFFFFF
    "GL_CLIENT_PIXEL_STORE_BIT",  # 0x00000001
    "GL_CLIENT_VERTEX_ARRAY_BIT", # 0x00000002
])

GLbitfield_shader = Flags(GLbitfield, [
    "GL_ALL_SHADER_BITS",                        # 0xFFFFFFFF
    "GL_VERTEX_SHADER_BIT",                      # 0x00000001
    "GL_FRAGMENT_SHADER_BIT",                    # 0x00000002
    "GL_GEOMETRY_SHADER_BIT",                    # 0x00000004
    "GL_TESS_CONTROL_SHADER_BIT",                # 0x00000008
    "GL_TESS_EVALUATION_SHADER_BIT",             # 0x00000010
    "GL_COMPUTE_SHADER_BIT",                     # 0x00000020
])

GLbitfield_access = Flags(GLbitfield, [
    "GL_MAP_READ_BIT",                # 0x0001
    "GL_MAP_WRITE_BIT",               # 0x0002
    "GL_MAP_INVALIDATE_RANGE_BIT",    # 0x0004
    "GL_MAP_INVALIDATE_BUFFER_BIT",   # 0x0008
    "GL_MAP_FLUSH_EXPLICIT_BIT",      # 0x0010
    "GL_MAP_UNSYNCHRONIZED_BIT",      # 0x0020
    "GL_MAP_PERSISTENT_BIT",          # 0x0040
    "GL_MAP_COHERENT_BIT",            # 0x0080
])

GLbitfield_storage = Flags(GLbitfield, [
    "GL_MAP_READ_BIT",                # 0x0001 (existing)
    "GL_MAP_WRITE_BIT",               # 0x0002 (existing)
    "GL_MAP_PERSISTENT_BIT",          # 0x0040
    "GL_MAP_COHERENT_BIT",            # 0x0080
    "GL_DYNAMIC_STORAGE_BIT",         # 0x0100
    "GL_CLIENT_STORAGE_BIT",          # 0x0200
])

GLbitfield_sync_flush = Flags(GLbitfield, [
    "GL_SYNC_FLUSH_COMMANDS_BIT",				# 0x00000001
])

GLbitfield_barrier = Flags(GLbitfield, [
    "GL_ALL_BARRIER_BITS",                      # 0xFFFFFFFF
    "GL_VERTEX_ATTRIB_ARRAY_BARRIER_BIT",       # 0x00000001
    "GL_ELEMENT_ARRAY_BARRIER_BIT",             # 0x00000002
    "GL_UNIFORM_BARRIER_BIT",                   # 0x00000004
    "GL_TEXTURE_FETCH_BARRIER_BIT",             # 0x00000008
    "GL_SHADER_GLOBAL_ACCESS_BARRIER_BIT_NV",   # 0x00000010
    "GL_SHADER_IMAGE_ACCESS_BARRIER_BIT",       # 0x00000020
    "GL_COMMAND_BARRIER_BIT",                   # 0x00000040
    "GL_PIXEL_BUFFER_BARRIER_BIT",              # 0x00000080
    "GL_TEXTURE_UPDATE_BARRIER_BIT",            # 0x00000100
    "GL_BUFFER_UPDATE_BARRIER_BIT",             # 0x00000200
    "GL_FRAMEBUFFER_BARRIER_BIT",               # 0x00000400
    "GL_TRANSFORM_FEEDBACK_BARRIER_BIT",        # 0x00000800
    "GL_ATOMIC_COUNTER_BARRIER_BIT",            # 0x00001000
    "GL_SHADER_STORAGE_BARRIER_BIT",            # 0x00002000
    "GL_CLIENT_MAPPED_BUFFER_BARRIER_BIT",      # 0x00004000
    "GL_QUERY_BUFFER_BARRIER_BIT",              # 0x00008000
])

GLbitfield_metricQueryMask = Flags(GLbitfield, [
    "GL_GLYPH_WIDTH_BIT_NV",                    # 0x01
    "GL_GLYPH_HEIGHT_BIT_NV",                   # 0x02
    "GL_GLYPH_HORIZONTAL_BEARING_X_BIT_NV",     # 0x04
    "GL_GLYPH_HORIZONTAL_BEARING_Y_BIT_NV",     # 0x08
    "GL_GLYPH_HORIZONTAL_BEARING_ADVANCE_BIT_NV", # 0x10
    "GL_GLYPH_VERTICAL_BEARING_X_BIT_NV",       # 0x20
    "GL_GLYPH_VERTICAL_BEARING_Y_BIT_NV",       # 0x40
    "GL_GLYPH_VERTICAL_BEARING_ADVANCE_BIT_NV", # 0x80
    "GL_GLYPH_HAS_KERNING_BIT_NV",              # 0x100
    "GL_FONT_X_MIN_BOUNDS_BIT_NV",              # 0x00010000
    "GL_FONT_Y_MIN_BOUNDS_BIT_NV",              # 0x00020000
    "GL_FONT_X_MAX_BOUNDS_BIT_NV",              # 0x00040000
    "GL_FONT_Y_MAX_BOUNDS_BIT_NV",              # 0x00080000
    "GL_FONT_UNITS_PER_EM_BIT_NV",              # 0x00100000
    "GL_FONT_ASCENDER_BIT_NV",                  # 0x00200000
    "GL_FONT_DESCENDER_BIT_NV",                 # 0x00400000
    "GL_FONT_HEIGHT_BIT_NV",                    # 0x00800000
    "GL_FONT_MAX_ADVANCE_WIDTH_BIT_NV",         # 0x01000000
    "GL_FONT_MAX_ADVANCE_HEIGHT_BIT_NV",        # 0x02000000
    "GL_FONT_UNDERLINE_POSITION_BIT_NV",        # 0x04000000
    "GL_FONT_UNDERLINE_THICKNESS_BIT_NV",       # 0x08000000
    "GL_FONT_HAS_KERNING_BIT_NV",               # 0x10000000
])

GLbitfield_fontStyle = Flags(GLbitfield, [
    "GL_BOLD_BIT_NV",                           # 0x01
    "GL_ITALIC_BIT_NV",                         # 0x02
])


# GL_ARB_vertex_array_bgra
size_bgra = FakeEnum(GLint, [
    "GL_BGRA",
])


def GLindexBuffer(countExpr, typeExpr):
    # Indices arguments are polymorphic:
    # - offsets when element array buffer is bound
    # - or a blob otherwise.
    sizeExpr = '%s*_gl_type_size(%s)' % (countExpr, typeExpr)
    return Polymorphic('_element_array_buffer_binding()', [
            ('0', Blob(Const(GLvoid), sizeExpr)),
        ],
        IntPointer("const GLvoid *"), 
        contextLess=False,
    )

def GLdrawArraysIndirectBuffer(drawcount=1, stride=0):
    # Indices arguments are polymorphic:
    # - offsets when element array buffer is bound
    # - or a blob otherwise.
    return Polymorphic('_draw_indirect_buffer_binding()', [
            ('0', Blob(Const(GLvoid), f'{drawcount} * ({stride} ? {stride} : 16)')),
        ],
        IntPointer("const GLvoid *"), 
        contextLess=False,
    )

def GLdrawElementsIndirectBuffer(drawcount=1, stride=0):
    # Indices arguments are polymorphic:
    # - offsets when element array buffer is bound
    # - or a blob otherwise.
    return Polymorphic('_draw_indirect_buffer_binding()', [
            ('0', Blob(Const(GLvoid), f'{drawcount} * ({stride} ? {stride} : 20)')),
        ],
        IntPointer("const GLvoid *"), 
        contextLess=False,
    )

# Polymorphic object name
def GLname(targetExpr):
    return Polymorphic(targetExpr, [
        ('GL_BUFFER', GLbuffer),
        ('GL_SHADER', GLshader),
        ('GL_PROGRAM', GLprogram),
        ('GL_VERTEX_ARRAY', GLarray),
        ('GL_QUERY', GLquery),
        ('GL_PROGRAM_PIPELINE', GLpipeline),
        ('GL_TRANSFORM_FEEDBACK', GLuint),
        ('GL_SAMPLER', GLsampler),
        ('GL_TEXTURE', GLtexture),
        ('GL_TEXTURE_1D', GLtexture),
        ('GL_TEXTURE_1D_ARRAY', GLtexture),
        ('GL_TEXTURE_2D', GLtexture),
        ('GL_TEXTURE_2D_MULTISAMPLE', GLtexture),
        ('GL_TEXTURE_2D_ARRAY', GLtexture),
        ('GL_TEXTURE_RECTANGLE', GLtexture),
        ('GL_TEXTURE_CUBE_MAP', GLtexture),
        ('GL_TEXTURE_CUBE_MAP_POSITIVE_X', GLtexture),
        ('GL_TEXTURE_CUBE_MAP_NEGATIVE_X', GLtexture),
        ('GL_TEXTURE_CUBE_MAP_POSITIVE_Y', GLtexture),
        ('GL_TEXTURE_CUBE_MAP_NEGATIVE_Y', GLtexture),
        ('GL_TEXTURE_CUBE_MAP_POSITIVE_Z', GLtexture),
        ('GL_TEXTURE_CUBE_MAP_NEGATIVE_Z', GLtexture),
        ('GL_TEXTURE_CUBE_MAP_ARRAY', GLtexture),
        ('GL_TEXTURE_3D', GLtexture),
        ('GL_RENDERBUFFER', GLrenderbuffer),
        ('GL_FRAMEBUFFER', GLframebuffer),
        ('GL_DISPLAY_LIST', GLlist),
        ('GL_FENCE_APPLE', GLfence),
        ('GL_DRAW_PIXELS_APPLE', GLuint), # GL_APPLE_fence
    ], GLuint)


# GL_AMD_performance_monitor
GLperfMonitorCounterInfoAMD = Polymorphic('pname', [
        ('GL_COUNTER_TYPE_AMD', Pointer(GLenum)),
        ('GL_PERCENTAGE_AMD', Pointer(Float)),
        ('GL_COUNTER_RANGE_AMD', Array(Float, 2)),
    ],
    OpaquePointer(GLvoid),
)

# GL_AMD_sparse_texture
GLbitfield_texStorageSparse = Flags(GLbitfield, [
    'GL_TEXTURE_STORAGE_SPARSE_BIT_AMD', # 0x00000001
])

# GL_NV_vdpau_interop
GLvdpauSurfaceNV = Alias('GLvdpauSurfaceNV', GLintptr)

# GL_EXT_texture_storage_compression
GLenum_texStorageCompression = FakeEnum(GLint, [
    'GL_SURFACE_COMPRESSION_FIXED_RATE_NONE_EXT',
    'GL_SURFACE_COMPRESSION_FIXED_RATE_DEFAULT_EXT',
    'GL_SURFACE_COMPRESSION_FIXED_RATE_1BPC_EXT',
    'GL_SURFACE_COMPRESSION_FIXED_RATE_2BPC_EXT',
    'GL_SURFACE_COMPRESSION_FIXED_RATE_3BPC_EXT',
    'GL_SURFACE_COMPRESSION_FIXED_RATE_4BPC_EXT',
    'GL_SURFACE_COMPRESSION_FIXED_RATE_5BPC_EXT',
    'GL_SURFACE_COMPRESSION_FIXED_RATE_6BPC_EXT',
    'GL_SURFACE_COMPRESSION_FIXED_RATE_7BPC_EXT',
    'GL_SURFACE_COMPRESSION_FIXED_RATE_8BPC_EXT',
    'GL_SURFACE_COMPRESSION_FIXED_RATE_9BPC_EXT',
    'GL_SURFACE_COMPRESSION_FIXED_RATE_10BPC_EXT',
    'GL_SURFACE_COMPRESSION_FIXED_RATE_11BPC_EXT',
    'GL_SURFACE_COMPRESSION_FIXED_RATE_12BPC_EXT'
])

GLattribs_texStorage = GLarray_int([
    ('GL_SURFACE_COMPRESSION_EXT', GLenum_texStorageCompression),
])
