Graphics Pipeline(详细)

Primitive Assembly

TemporaryVariables

Uniforms

Fragment Shader

gl_Positiongl_FrontFacintgl_PointSize

Special Functions1.glFlush2.glFinish

Per-Fragment Operation

Blending

State and State Requests1.glEnable/glDisable2.glGetBooleanv/glGetIntegerv/glGetFloatv/glGetString3.glIsEnabled

Vertex Shader

Pre-FragmentOperations

Vertices1.glVertexAttrib{1234}{f}/glVertexAttrib{1234}{f}v2.glVertexAttribPointer3.EnableVertexAttribArray/glDisableVertexAttribArray4.glDrawArrays/glDrawElements

Scissor Test

Texturing1.glActiveTexture2.glBindTexture/glGenTextures/glDeleteTextures3.glTexImage2D/glTexSubImage2D4.glCopyTexImage2D/glCopyTexSubImage2D5.glCompressedTexImage2D/glCompressedTexSubImage2D6.glTexParameter{if}/glTexParameter{if}v7.glGenerateMipmap

Samplers(optional)

Buffer Objects1.glGenBuffers/glDeleteBuffers2.glBindBuffer3.glBufferData/glBufferSubData4.glIsBuffer5.glGetBufferParameteriv

Framebuffer Objects1.glBindFramebuffer/glDeleteFramebuffers/glGenFramebuffers/2.glBindRenderbuffer/glDeleteRenderbuffers/glGenRenderbuffers3.glRenderbufferStorage4.glFramebufferRenderbuffer5.glFramebufferTexture2D

API

Viewport and Clipping1.glDepthRangef2.glViewport

Shaders and Programs1.glCreateShader/glDeleteShader2.glShaderSource3.glCompileShader4.glGetShaderiv/glGetShaderInfoLogiv1.glCreateProgram/glDeleteProgram2.glAttachShader/glDetachShader3.glLinkProgram4.glUseProgram5.glGetProgramiv/glGetProgramInfologShaders and Program:1.glGetAttribLocation2.glBindAttribLocation3.glGetUniformLocation4.glUniform{1234}{if}/glUniform{1234}{if}v5.glUniformMatrix{234}fv

图元装配阶段:1.顶点装配成图元(三角、线、点）。2.剔除视图平截体外的图元。3.顶点数据转换成屏幕坐标系。4.执行背面/正面剔除。

Whole Framebuffer Operation1.glColorMask/glDepthMask/glStencilMask2.glClear3.glClearColor/glClearDepthf/glClearStencil

Rasterization

Varying 0-7

Pixel Ownership Test

Stencil Test

Pre-Fragment Operation1.glScissor2.glStencilFunc/glStencilFuncSeperate3.glStencilOp/glStencilOpSeperate4.glDepthFunc5.glBlendEquation/glBlendEquationSeperate6.glBlendFunc/glBlendFuncSeperate7.glBlendColor

Vertex Array/Buffer Objects

光栅化阶段:1.将顶点数据转换成片元。

在Vertex Shader中: Attributes: Vertex Arrays提供的每个顶点数据。 Uniforms: 常量。 Samplers: 代表纹理的特殊Uniforms。

gl_FragColor

Texture Memory

Dithering

Fragment Data

Framebuffer

Rasterization1.glLineWidth2.glFrontFace/glCullFace3.glPolygonOffset

Depth Test

Attribute 0-7