114 lines
3.5 KiB
Cython
114 lines
3.5 KiB
Cython
#@PydevCodeAnalysisIgnore
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#cython: profile=False
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# Copyright 2004-2019 Tom Rothamel <pytom@bishoujo.us>
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#
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# Permission is hereby granted, free of charge, to any person
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# obtaining a copy of this software and associated documentation files
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# (the "Software"), to deal in the Software without restriction,
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# including without limitation the rights to use, copy, modify, merge,
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# publish, distribute, sublicense, and/or sell copies of the Software,
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# and to permit persons to whom the Software is furnished to do so,
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# subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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from __future__ import print_function
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from gl cimport *
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from gldraw cimport *
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from gldraw import Rtt
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import renpy
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# The framebuffer object we use.
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cdef GLuint fbo
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# The root framebuffer.
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cdef GLint root_fbo
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# The renderbuffer object we use.
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cdef GLuint texture
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class FboRtt(Rtt):
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"""
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This class uses texture copying to implement Render-to-texture.
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"""
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def init(self):
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glGetIntegerv(GL_FRAMEBUFFER_BINDING_EXT, &root_fbo);
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renpy.display.log.write("Root FBO is: %d", root_fbo)
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glGenFramebuffersEXT(1, &fbo)
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glGenTextures(1, &texture)
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cdef int i
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glGetIntegerv(GL_MAX_TEXTURE_SIZE, &i)
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self.size_limit = min(i, 2048)
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renpy.display.log.write("FBO Maximum Texture Size: %d", self.size_limit)
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glBindTexture(GL_TEXTURE_2D, texture)
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, self.size_limit, self.size_limit, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL)
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo)
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glFramebufferTexture2DEXT(
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GL_FRAMEBUFFER_EXT,
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GL_COLOR_ATTACHMENT0_EXT,
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GL_TEXTURE_2D,
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texture,
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0)
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, root_fbo)
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def deinit(self):
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"""
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Called before changing the GL context.
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"""
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, root_fbo)
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glDeleteFramebuffersEXT(1, &fbo)
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glDeleteTextures(1, &texture)
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def begin(self):
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"""
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This function should be called when a Render-to-texture
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session begins. It's responsible for setting the GPU to
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RTT mode.
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"""
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def render(self, Environ environ, texture, x, y, w, h, draw_func):
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"""
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This function is called to trigger a rendering to a texture.
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`x`, `y`, `w`, and `h` specify the location and dimensions of
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the sub-image to render to the texture. `draw_func` is called
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to render the texture.
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"""
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try:
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo)
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environ.viewport(0, 0, w, h)
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environ.ortho(x, x + w, y, y + h, -1, 1)
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draw_func(x, y, w, h)
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glBindTexture(GL_TEXTURE_2D, texture)
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glCopyTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 0, 0, w, h, 0)
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finally:
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, root_fbo)
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def get_size_limit(self, dimension):
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return self.size_limit
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