make sure the angle opengl es 2.0 emulation libraries

You do NOT have to call glGenXXX before calling glBindXXX. You'll see we create internal tracking objects on glGenXXX but they are marked as invalid until glBindXXX time (except for Queries) This is a arguably a bug in the command buffer right now though there is code to work around it. Printf('%s ', glIsTexture(tex) ? 'true' : 'false') // prints true Printf('%s ', glIsTexture(tex) ? 'true' : 'false') // prints false

glGenXXX only reserves a name, it does not create a resource.

This command will effect texture0 not texture1Īs more texture targets are added there are more binding points. But, glActiveTexture select the active texture slot, each one has these binding points.

The reference pages for OpenGL ES 2.0 were derived from OpenGL 1.0 written in 1993 when maybe there was only 1 texture allowed and talk about 2 binding points, GL_TEXTURE_2D, and GL_TEXTURE_CUBE_MAP.

There are N * M texture binding points.

for texture and renderbuffer formats see GetChannelsForFormat.

for texture and buffer formats see ElementsPerGroup, BytesPerElement.

for glGetInteger enums add them to GLES2Util:GLGetNumValuesReturned.

Add them in src/gpu/command_buffer/common/gles2_cmd_.

In particular, add them only if your functionally is available and if they are requested.

Add them in src/gpu/command_buffer/service/function_.

If your function adds any new GL ENUMs to other functions (most commonly glGetInteger, glTexImage2D, etc.).

If you only need it callable from WebGraphicsContext3DCommandBufferImpl then you don't need to do this step.

Add your function to src/third_party/gl2ext.h if you want it callable as an OpenGL like function.

Note: we don't currently run this as part of the build as this lets us easily see the changes during code review.

run build_gles2_cmd_buffer.py from the command_buffer directory.

Add your function to _FUNCTION_INFO in src/gpu/command_buffer/build_gles2_cmd_buffer.pyĬopy a function that is similar to yours.

For GLint, GLintptr or GLsizei, if negative is disallowed GLxxxNotNegative.

Add your function to src/gpu/command_buffer/cmd_buffer_functions.txt.

Make sure the angle opengl es 2.0 emulation libraries