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LibGL: Add supporting code for depth buffer

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This adds glClearDepth() and new caps for enabling and disabling
the depth buffer with glEnable() and glDisable()
This commit is contained in:
Stephan Unverwerth 2021-05-06 23:17:35 +02:00 • committed by Andreas Kling
parent d922c2f5f3
commit a8fc4be47a
6 changed files with 57 additions and 4 deletions
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47
Userland/Libraries/LibGL/SoftwareGLContext.cpp
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@ -55,12 +55,18 @@ void SoftwareGLContext::gl_clear(GLbitfield mask)
return;
}
if (mask & GL_COLOR_BUFFER_BIT) {
m_rasterizer.clear_color(m_clear_color);
m_error = GL_NO_ERROR;
} else {
if (mask & ~(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)) {
m_error = GL_INVALID_ENUM;
return;
}
if (mask & GL_COLOR_BUFFER_BIT)
m_rasterizer.clear_color(m_clear_color);
if (mask & GL_DEPTH_BUFFER_BIT)
m_rasterizer.clear_depth(static_cast<float>(m_clear_depth));
m_error = GL_NO_ERROR;
}
void SoftwareGLContext::gl_clear_color(GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha)
@ -74,6 +80,17 @@ void SoftwareGLContext::gl_clear_color(GLclampf red, GLclampf green, GLclampf bl
m_error = GL_NO_ERROR;
}
void SoftwareGLContext::gl_clear_depth(GLdouble depth)
{
if (m_in_draw_state) {
m_error = GL_INVALID_OPERATION;
return;
}
m_clear_depth = depth;
m_error = GL_NO_ERROR;
}
void SoftwareGLContext::gl_color(GLdouble r, GLdouble g, GLdouble b, GLdouble a)
{
m_current_vertex_color = { (float)r, (float)g, (float)b, (float)a };
@ -601,14 +618,25 @@ void SoftwareGLContext::gl_enable(GLenum capability)
return;
}
auto rasterizer_options = m_rasterizer.options();
bool update_rasterizer_options = false;
switch (capability) {
case GL_CULL_FACE:
m_cull_faces = true;
break;
case GL_DEPTH_TEST:
m_depth_test_enabled = true;
rasterizer_options.enable_depth_test = true;
update_rasterizer_options = true;
break;
default:
m_error = GL_INVALID_ENUM;
break;
}
if (update_rasterizer_options)
m_rasterizer.set_options(rasterizer_options);
}
void SoftwareGLContext::gl_disable(GLenum capability)
@ -618,14 +646,25 @@ void SoftwareGLContext::gl_disable(GLenum capability)
return;
}
auto rasterizer_options = m_rasterizer.options();
bool update_rasterizer_options = false;
switch (capability) {
case GL_CULL_FACE:
m_cull_faces = false;
break;
case GL_DEPTH_TEST:
m_depth_test_enabled = false;
rasterizer_options.enable_depth_test = false;
update_rasterizer_options = true;
break;
default:
m_error = GL_INVALID_ENUM;
break;
}
if (update_rasterizer_options)
m_rasterizer.set_options(rasterizer_options);
}
void SoftwareGLContext::gl_front_face(GLenum face)