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API to map OpenGL buffers

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Kovid Goyal
2017-09-08 17:22:00 +05:30
parent 012b209a56
commit 281cb50780
2 changed files with 48 additions and 11 deletions
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28
kitty/shaders.py
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@@ -6,7 +6,7 @@ import os
import sys
from collections import namedtuple
from contextlib import contextmanager
from ctypes import addressof, sizeof
from ctypes import addressof, c_char, sizeof
from functools import lru_cache
from .fast_data_types import (
@@ -16,7 +16,7 @@ from .fast_data_types import (
GL_TEXTURE0, GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER,
GL_TEXTURE_MIN_FILTER, GL_TEXTURE_WRAP_S, GL_TEXTURE_WRAP_T, GL_TRUE,
GL_UNIFORM_BUFFER, GL_UNPACK_ALIGNMENT, GL_UNSIGNED_BYTE, GL_VERTEX_SHADER,
ITALIC, copy_image_sub_data, get_uniform_block_offsets,
GL_WRITE_ONLY, ITALIC, copy_image_sub_data, get_uniform_block_offsets,
get_uniform_block_size, glActiveTexture, glAttachShader, glBindBuffer,
glBindBufferBase, glBindTexture, glBindVertexArray, glCompileShader,
glCopyImageSubData, glCreateProgram, glCreateShader, glDeleteBuffer,
@@ -24,11 +24,12 @@ from .fast_data_types import (
glEnableVertexAttribArray, glGenBuffers, glGenTextures, glGenVertexArrays,
glGetAttribLocation, glGetBufferSubData, glGetIntegerv,
glGetProgramInfoLog, glGetProgramiv, glGetShaderInfoLog, glGetShaderiv,
glGetUniformBlockIndex, glGetUniformLocation, glLinkProgram, glPixelStorei,
glShaderSource, glTexParameteri, glTexStorage3D, glTexSubImage3D,
glUseProgram, glVertexAttribDivisor, glVertexAttribPointer,
render_dirty_sprites, replace_or_create_buffer, sprite_map_current_layout,
sprite_map_increment, sprite_map_set_layout, sprite_map_set_limits, sprite_map_free
glGetUniformBlockIndex, glGetUniformLocation, glLinkProgram, glMapBuffer,
glPixelStorei, glShaderSource, glTexParameteri, glTexStorage3D,
glTexSubImage3D, glUnmapBuffer, glUseProgram, glVertexAttribDivisor,
glVertexAttribPointer, render_dirty_sprites, replace_or_create_buffer,
sprite_map_current_layout, sprite_map_free, sprite_map_increment,
sprite_map_set_layout, sprite_map_set_limits
)
from .fonts.render import render_cell
from .utils import safe_print
@@ -98,6 +99,19 @@ class BufferManager: # {{{
yield
self.unbind(buf_id)
@contextmanager
def mapped_buffer(self, buf_sz, buf_id, usage=GL_STREAM_DRAW, access=GL_WRITE_ONLY):
prev_sz = self.sizes.get(buf_id, 0)
buf_type = self.types[buf_id]
if prev_sz != buf_sz:
replace_or_create_buffer(buf_id, buf_sz, 0, 0, usage, buf_type)
self.sizes[buf_id] = buf_sz
self.ctypes_types[buf_id] = c_char
with self.bound_buffer(buf_id):
address = glMapBuffer(buf_type, access)
yield address
glUnmapBuffer(buf_type)
buffer_manager = BufferManager()
# }}}