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LibGL: Implement glReadBuffer()

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This commit is contained in:
Stephan Unverwerth 2021-05-24 15:24:49 +02:00 • committed by Linus Groh
parent 0c6f019285
commit 24e74750d5
5 changed files with 60 additions and 2 deletions
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41
Userland/Libraries/LibGL/SoftwareGLContext.cpp
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@ -1009,6 +1009,47 @@ void SoftwareGLContext::gl_hint(GLenum target, GLenum mode)
// According to the spec implementors are free to ignore glHint. So we do.
}
void SoftwareGLContext::gl_read_buffer(GLenum mode)
{
APPEND_TO_CALL_LIST_AND_RETURN_IF_NEEDED(gl_read_buffer, mode);
if (m_in_draw_state) {
m_error = GL_INVALID_OPERATION;
return;
}
// FIXME: Also allow aux buffers GL_AUX0 through GL_AUX3 here
// plus any aux buffer between 0 and GL_AUX_BUFFERS
if (mode != GL_FRONT_LEFT
&& mode != GL_FRONT_RIGHT
&& mode != GL_BACK_LEFT
&& mode != GL_BACK_RIGHT
&& mode != GL_FRONT
&& mode != GL_BACK
&& mode != GL_LEFT
&& mode != GL_RIGHT) {
m_error = GL_INVALID_ENUM;
return;
}
// FIXME: We do not currently have aux buffers, so make it an invalid
// operation to select anything but front or back buffers. Also we do
// not allow selecting the stereoscopic RIGHT buffers since we do not
// have them configured.
if (mode != GL_FRONT_LEFT
&& mode != GL_FRONT
&& mode != GL_BACK_LEFT
&& mode != GL_BACK
&& mode != GL_FRONT
&& mode != GL_BACK
&& mode != GL_LEFT) {
m_error = GL_INVALID_OPERATION;
return;
}
m_current_read_buffer = mode;
}
void SoftwareGLContext::present()
{
m_rasterizer.blit_to(*m_frontbuffer);