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LibGL: Implement glScissor()

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This commit is contained in:
Jelle Raaijmakers 2021-11-27 19:00:16 +01:00 • committed by Brian Gianforcaro
parent 6dd2ebfe8e
commit bb58f6ccab
9 changed files with 83 additions and 10 deletions
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28
Userland/Libraries/LibGL/SoftwareGLContext.cpp
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@ -549,6 +549,10 @@ void SoftwareGLContext::gl_enable(GLenum capability)
rasterizer_options.fog_enabled = true;
update_rasterizer_options = true;
break;
case GL_SCISSOR_TEST:
rasterizer_options.scissor_enabled = true;
update_rasterizer_options = true;
break;
default:
RETURN_WITH_ERROR_IF(true, GL_INVALID_ENUM);
}
@ -589,6 +593,10 @@ void SoftwareGLContext::gl_disable(GLenum capability)
rasterizer_options.fog_enabled = false;
update_rasterizer_options = true;
break;
case GL_SCISSOR_TEST:
rasterizer_options.scissor_enabled = false;
update_rasterizer_options = true;
break;
default:
RETURN_WITH_ERROR_IF(true, GL_INVALID_ENUM);
}
@ -614,6 +622,8 @@ GLboolean SoftwareGLContext::gl_is_enabled(GLenum capability)
return m_alpha_test_enabled;
case GL_FOG:
return rasterizer_options.fog_enabled;
case GL_SCISSOR_TEST:
return rasterizer_options.scissor_enabled;
}
RETURN_VALUE_WITH_ERROR_IF(true, GL_INVALID_ENUM, 0);
@ -1472,6 +1482,14 @@ void SoftwareGLContext::gl_get_integerv(GLenum pname, GLint* data)
case GL_MAX_TEXTURE_SIZE:
*data = 4096;
break;
case GL_SCISSOR_BOX: {
auto scissor_box = m_rasterizer.options().scissor_box;
*(data + 0) = scissor_box.x();
*(data + 1) = scissor_box.y();
*(data + 2) = scissor_box.width();
*(data + 3) = scissor_box.height();
break;
}
default:
// According to the Khronos docs, we always return GL_INVALID_ENUM if we encounter a non-accepted value
// for `pname`
@ -1966,6 +1984,16 @@ void SoftwareGLContext::gl_pixel_store(GLenum pname, GLfloat param)
}
}
void SoftwareGLContext::gl_scissor(GLint x, GLint y, GLsizei width, GLsizei height)
{
APPEND_TO_CALL_LIST_AND_RETURN_IF_NEEDED(gl_scissor, x, y, width, height);
RETURN_WITH_ERROR_IF(width < 0 || height < 0, GL_INVALID_VALUE);
auto options = m_rasterizer.options();
options.scissor_box = { x, y, width, height };
m_rasterizer.set_options(options);
}
void SoftwareGLContext::present()
{
m_rasterizer.blit_to(*m_frontbuffer);