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LibWeb/WebGL: Reimplement OpenGLContext::clear_buffer_to_default_values

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The implementation was removed with the migration to ANGLE. This
reimplements it. This is required by Stimulation Clicker on neal.fun,
which does not clear the framebuffer itself, instead relying on the
browser doing it.
This commit is contained in:
Luke Wilde 2025-01-28 17:11:47 +00:00 • committed by Andreas Kling
parent dbf52a1b5f
commit 13f28cb941
Notes: github-actions[bot] 2025-02-09 00:02:06 +00:00
1 changed files with 26 additions and 0 deletions
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26
Libraries/LibWeb/WebGL/OpenGLContext.cpp
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@ -123,6 +123,32 @@ void OpenGLContext::notify_content_will_change()
void OpenGLContext::clear_buffer_to_default_values()
{
#ifdef AK_OS_MACOS
Array<GLfloat, 4> current_clear_color;
glGetFloatv(GL_COLOR_CLEAR_VALUE, current_clear_color.data());
GLfloat current_clear_depth;
glGetFloatv(GL_DEPTH_CLEAR_VALUE, &current_clear_depth);
GLint current_clear_stencil;
glGetIntegerv(GL_STENCIL_CLEAR_VALUE, &current_clear_stencil);
// The implicit clear value for the color buffer is (0, 0, 0, 0)
glClearColor(0, 0, 0, 0);
// The implicit clear value for the depth buffer is 1.0.
glClearDepthf(1.0f);
// The implicit clear value for the stencil buffer is 0.
glClearStencil(0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
// Restore the clear values.
glClearColor(current_clear_color[0], current_clear_color[1], current_clear_color[2], current_clear_color[3]);
glClearDepthf(current_clear_depth);
glClearStencil(current_clear_stencil);
#endif
}
void OpenGLContext::allocate_painting_surface_if_needed()