Documentation
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Overview ¶
Package gl provides OpenGL constants and types for the GLES backend.
Package gl provides low-level OpenGL function bindings using syscall.
This package is used internally by the GLES HAL backend. It loads OpenGL functions at runtime via wglGetProcAddress (Windows) or platform-specific loaders.
Usage ¶
The Context type holds function pointers loaded at runtime:
ctx := &gl.Context{}
ctx.Load(wgl.GetGLProcAddress)
ctx.ClearColor(0.2, 0.3, 0.3, 1.0)
ctx.Clear(gl.COLOR_BUFFER_BIT)
Index ¶
Constants ¶
View Source
const ( // Boolean values FALSE = 0 TRUE = 1 // Data types BYTE = 0x1400 UNSIGNED_BYTE = 0x1401 SHORT = 0x1402 UNSIGNED_SHORT = 0x1403 INT = 0x1404 UNSIGNED_INT = 0x1405 FLOAT = 0x1406 HALF_FLOAT = 0x140B // Errors NO_ERROR = 0 INVALID_ENUM = 0x0500 INVALID_VALUE = 0x0501 INVALID_OPERATION = 0x0502 OUT_OF_MEMORY = 0x0505 INVALID_FRAMEBUFFER_OPERATION = 0x0506 // Capabilities BLEND = 0x0BE2 CULL_FACE = 0x0B44 DEPTH_TEST = 0x0B71 DITHER = 0x0BD0 SCISSOR_TEST = 0x0C11 STENCIL_TEST = 0x0B90 // Buffer targets ARRAY_BUFFER = 0x8892 ELEMENT_ARRAY_BUFFER = 0x8893 UNIFORM_BUFFER = 0x8A11 COPY_READ_BUFFER = 0x8F36 COPY_WRITE_BUFFER = 0x8F37 PIXEL_PACK_BUFFER = 0x88EB PIXEL_UNPACK_BUFFER = 0x88EC TRANSFORM_FEEDBACK_BUFFER = 0x8C8E // Buffer usage STREAM_DRAW = 0x88E0 STREAM_READ = 0x88E1 STREAM_COPY = 0x88E2 STATIC_DRAW = 0x88E4 STATIC_READ = 0x88E5 STATIC_COPY = 0x88E6 DYNAMIC_DRAW = 0x88E8 DYNAMIC_READ = 0x88E9 DYNAMIC_COPY = 0x88EA // Texture targets TEXTURE_2D = 0x0DE1 TEXTURE_3D = 0x806F TEXTURE_2D_ARRAY = 0x8C1A TEXTURE_CUBE_MAP = 0x8513 TEXTURE_CUBE_MAP_POSITIVE_X = 0x8515 TEXTURE_CUBE_MAP_NEGATIVE_X = 0x8516 TEXTURE_CUBE_MAP_POSITIVE_Y = 0x8517 TEXTURE_CUBE_MAP_NEGATIVE_Y = 0x8518 TEXTURE_CUBE_MAP_POSITIVE_Z = 0x8519 TEXTURE_CUBE_MAP_NEGATIVE_Z = 0x851A // Texture parameters TEXTURE_MAG_FILTER = 0x2800 TEXTURE_MIN_FILTER = 0x2801 TEXTURE_WRAP_S = 0x2802 TEXTURE_WRAP_T = 0x2803 TEXTURE_WRAP_R = 0x8072 // Texture filter modes NEAREST = 0x2600 LINEAR = 0x2601 NEAREST_MIPMAP_NEAREST = 0x2700 LINEAR_MIPMAP_NEAREST = 0x2701 NEAREST_MIPMAP_LINEAR = 0x2702 LINEAR_MIPMAP_LINEAR = 0x2703 // Texture wrap modes REPEAT = 0x2901 CLAMP_TO_EDGE = 0x812F MIRRORED_REPEAT = 0x8370 // Pixel formats DEPTH_COMPONENT = 0x1902 RED = 0x1903 RG = 0x8227 RGB = 0x1907 RGBA = 0x1908 DEPTH_STENCIL = 0x84F9 RED_INTEGER = 0x8D94 RG_INTEGER = 0x8228 RGB_INTEGER = 0x8D98 RGBA_INTEGER = 0x8D99 BGRA = 0x80E1 DEPTH_COMPONENT16 = 0x81A5 DEPTH_COMPONENT24 = 0x81A6 DEPTH_COMPONENT32 = 0x81A7 DEPTH24_STENCIL8 = 0x88F0 // Internal formats R8 = 0x8229 R16F = 0x822D R32F = 0x822E RG8 = 0x822B RG16F = 0x822F RG32F = 0x8230 RGB8 = 0x8051 RGBA8 = 0x8058 SRGB8 = 0x8C41 SRGB8_ALPHA8 = 0x8C43 RGB16F = 0x881B RGBA16F = 0x881A RGB32F = 0x8815 RGBA32F = 0x8814 R8I = 0x8231 R8UI = 0x8232 R16I = 0x8233 R16UI = 0x8234 R32I = 0x8235 R32UI = 0x8236 RG8I = 0x8237 RG8UI = 0x8238 RG16I = 0x8239 RG16UI = 0x823A RG32I = 0x823B RG32UI = 0x823C RGBA8I = 0x8D8E RGBA8UI = 0x8D7C RGBA16I = 0x8D88 RGBA16UI = 0x8D76 RGBA32I = 0x8D82 RGBA32UI = 0x8D70 DEPTH32F_STENCIL8 = 0x8CAD // Shader types FRAGMENT_SHADER = 0x8B30 VERTEX_SHADER = 0x8B31 COMPUTE_SHADER = 0x91B9 // Shader parameters COMPILE_STATUS = 0x8B81 LINK_STATUS = 0x8B82 INFO_LOG_LENGTH = 0x8B84 ACTIVE_UNIFORMS = 0x8B86 ACTIVE_ATTRIBUTES = 0x8B89 SHADER_SOURCE_LENGTH = 0x8B88 // Draw modes POINTS = 0x0000 LINES = 0x0001 LINE_LOOP = 0x0002 LINE_STRIP = 0x0003 TRIANGLES = 0x0004 TRIANGLE_STRIP = 0x0005 TRIANGLE_FAN = 0x0006 // Blend factors ZERO = 0 ONE = 1 SRC_COLOR = 0x0300 ONE_MINUS_SRC_COLOR = 0x0301 SRC_ALPHA = 0x0302 ONE_MINUS_SRC_ALPHA = 0x0303 DST_ALPHA = 0x0304 ONE_MINUS_DST_ALPHA = 0x0305 DST_COLOR = 0x0306 ONE_MINUS_DST_COLOR = 0x0307 SRC_ALPHA_SATURATE = 0x0308 CONSTANT_COLOR = 0x8001 ONE_MINUS_CONSTANT_COLOR = 0x8002 CONSTANT_ALPHA = 0x8003 ONE_MINUS_CONSTANT_ALPHA = 0x8004 // Blend equations FUNC_ADD = 0x8006 FUNC_SUBTRACT = 0x800A FUNC_REVERSE_SUBTRACT = 0x800B MIN = 0x8007 MAX = 0x8008 // Depth functions NEVER = 0x0200 LESS = 0x0201 EQUAL = 0x0202 LEQUAL = 0x0203 GREATER = 0x0204 NOTEQUAL = 0x0205 GEQUAL = 0x0206 ALWAYS = 0x0207 // Stencil operations KEEP = 0x1E00 REPLACE = 0x1E01 INCR = 0x1E02 DECR = 0x1E03 INVERT = 0x150A INCR_WRAP = 0x8507 DECR_WRAP = 0x8508 // Face culling FRONT = 0x0404 BACK = 0x0405 FRONT_AND_BACK = 0x0408 CW = 0x0900 CCW = 0x0901 // Framebuffer FRAMEBUFFER = 0x8D40 READ_FRAMEBUFFER = 0x8CA8 DRAW_FRAMEBUFFER = 0x8CA9 RENDERBUFFER = 0x8D41 COLOR_ATTACHMENT0 = 0x8CE0 DEPTH_ATTACHMENT = 0x8D00 STENCIL_ATTACHMENT = 0x8D20 DEPTH_STENCIL_ATTACHMENT = 0x821A FRAMEBUFFER_COMPLETE = 0x8CD5 // Clear bits COLOR_BUFFER_BIT = 0x00004000 DEPTH_BUFFER_BIT = 0x00000100 STENCIL_BUFFER_BIT = 0x00000400 // Get parameters VENDOR = 0x1F00 RENDERER = 0x1F01 VERSION = 0x1F02 SHADING_LANGUAGE_VERSION = 0x8B8C EXTENSIONS = 0x1F03 MAX_TEXTURE_SIZE = 0x0D33 MAX_TEXTURE_IMAGE_UNITS = 0x8872 MAX_VERTEX_ATTRIBS = 0x8869 MAX_VERTEX_UNIFORM_COMPONENTS = 0x8B4A MAX_FRAGMENT_UNIFORM_COMPONENTS = 0x8B49 MAX_UNIFORM_BUFFER_BINDINGS = 0x8A2F MAX_UNIFORM_BLOCK_SIZE = 0x8A30 MAX_COMBINED_TEXTURE_IMAGE_UNITS = 0x8B4D MAX_COLOR_ATTACHMENTS = 0x8CDF MAX_DRAW_BUFFERS = 0x8824 MAX_RENDERBUFFER_SIZE = 0x84E8 MAX_SAMPLES = 0x8D57 // VAO VERTEX_ARRAY_BINDING = 0x85B5 // Sync objects SYNC_GPU_COMMANDS_COMPLETE = 0x9117 ALREADY_SIGNALED = 0x911A TIMEOUT_EXPIRED = 0x911B CONDITION_SATISFIED = 0x911C WAIT_FAILED = 0x911D SYNC_FLUSH_COMMANDS_BIT = 0x00000001 TIMEOUT_IGNORED = 0xFFFFFFFFFFFFFFFF )
OpenGL ES 3.0 / OpenGL 3.3 constants. These are the subset needed for WebGPU implementation. OpenGL constants use ALL_CAPS by industry convention.
Variables ¶
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Functions ¶
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Types ¶
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