opengl-es - OpenGL ES 2.0 和 OpenGL ES 3.0 有什么区别

Question

我想知道OpenGL ES 2.0和OpenGL ES 3.0之间有什么区别。

OpenGL ES 3.0的主要优点是什么？

Answer 1

总体而言，这些变化通过更大的缓冲区、更多的格式、更多的统一等提高了灵 active 。实例化渲染、像素缓冲区对象和遮挡查询等附加功能提供了优化的机会。根据您的平台，它可能是革命性的，但是许多关键功能已经是 iOS 等平台上的扩展。

就我个人的工作而言，最重要的变化是:

• 顶点数组对象
• 实例渲染
• ETC2/EAC 纹理压缩格式(以前在 Android 上每个卡制造商仅支持自己的纹理格式)

以下是 spec 中描述的更改列表由 Alexey 链接:

New features in OpenGL ES 3.0 include:

• OpenGL Shading Language ES 3.00
• transform feedback 1 and 2 (with restrictions)
• uniform buffer objects including block arrays
• vertex array objects
• sampler objects
• sync objects and fences
• pixel buffer objects
• buffer subrange mapping
• buffer object to buffer object copies 314
• boolean occlusion queries, including conservative mode
• instanced rendering, via shader variable and/or vertex attribute divisor
• multiple render targets
• 2D array and 3D textures
• simplified texture storage specification
• R and RG textures
• texture swizzles
• seamless cube maps
• non-power-of-two textures with full wrap mode support and mipmapping
• texture LOD clamps and mipmap level base offset and max clamp
• at least 32 textures, at least 16 each for fragment and vertex shaders
• 16-bit (with filtering) and 32-bit (without filtering) floating-point textures
• 32-bit, 16-bit, and 8-bit signed and unsigned integer renderbuffers, textures, and vertex attributes
• 8-bit sRGB textures and framebuffers (without mixed RGB/sRGB rendering)
• 11/11/10 floating-point RGB textures
• shared exponent RGB 9/9/9/5 textures
• 10/10/10/2 unsigned normalized and unnormalized integer textures
• 10/10/10/2 signed and unsigned normalized vertex attributes
• 16-bit floating-point vertex attributes
• 8-bit-per-component signed normalized textures
• ETC2/EAC texture compression formats
• sized internal texture formats with minimum precision guarantees
• multisample renderbuffers
• 8-bit unsigned normalized renderbuffers
• depth textures and shadow comparison
• 24-bit depth renderbuffers and textures
• 24/8 depth/stencil renderbuffers and textures
• 32-bit depth and 32F/8 depth/stencil renderbuffers and textures
• stretch blits (with restrictions)
• framebuffer invalidation hints
• primitive restart with fixed index
• unsigned integer element indices with at least 24 usable bits
• draw command allowing specification of range of accessed elements
• ability to attach any mipmap level to a framebuffer object
• minimum/maximum blend equations
• program binaries, including querying binaries from linked GLSL programs
• mandatory online compiler
• non-square and transposable uniform matrices
• additional pixel store state
• indexed extension string queries