| Name |
| |
| ANGLE_polygon_mode |
| |
| Name Strings |
| |
| GL_ANGLE_polygon_mode |
| |
| Status |
| |
| Draft |
| |
| Version |
| |
| Last Modified Date: March 31, 2023 |
| Revision: 1 |
| |
| Number |
| |
| OpenGL ES Extension XX |
| |
| Dependencies |
| |
| This extension is written against the OpenGL ES 3.1 (November 3, 2016) |
| specification, but can apply to earlier versions. |
| |
| Overview |
| |
| Rendering triangle primitives as lines, i.e., in a wireframe mode, |
| is useful for debugging GPU applications. |
| |
| This effect cannot be achieved by drawing the same triangle primitives with |
| the LINES mode due to differences in primitive assembly and rasterization. |
| Moreover, polygon offset state is ignored for line primitives thus making |
| the wireframe overlay even more difficult to be rendered correctly. |
| |
| This extension has the same semantics as NV_polygon_mode but the point |
| rasterization mode is omitted to support the extension on layered OpenGL ES |
| implementations, such as ANGLE, when the underlying API does not support |
| point rasterization mode. |
| |
| New Procedures and Functions |
| |
| void PolygonModeANGLE(enum face, enum mode); |
| |
| New Tokens |
| |
| Accepted by the <pname> parameter to GetIntegerv: |
| |
| POLYGON_MODE_ANGLE 0x0B40 |
| |
| Accepted by the <pname> parameters of Enable, Disable and IsEnabled: |
| |
| POLYGON_OFFSET_LINE_ANGLE 0x2A02 |
| |
| Returned by GetIntegerv, GetFloatv, and GetInteger64v when <pname> is |
| POLYGON_MODE_ANGLE: |
| |
| LINE_ANGLE 0x1B01 |
| FILL_ANGLE 0x1B02 |
| |
| New State |
| |
| Modify Table 20.6, Rasterization |
| |
| Add: |
| |
| Initial |
| Get Value Type Get Command Value Description Sec. |
| ----------------------- ---- ----------- ---------- --------------------------- ------ |
| POLYGON_MODE_ANGLE E GetIntegerv FILL_ANGLE Polygon rasterization mode 13.5.1pm |
| (front & back) |
| POLYGON_OFFSET_LINE_ANGLE B IsEnabled FALSE Polygon offset enable for 13.5.2 |
| LINE_ANGLE mode rasterization |
| |
| Change description for POLYGON_OFFSET_FILL to "Polygon offset enable for |
| FILL_ANGLE mode rasterization" |
| |
| Errors |
| |
| An INVALID_ENUM error is generated by PolygonModeANGLE if <face> is not |
| FRONT_AND_BACK. |
| |
| An INVALID_ENUM error is generated by PolygonModeANGLE if <mode> is not |
| one of LINE_ANGLE or FILL_ANGLE. |
| |
| Revision History |
| |
| 3/31/2023 First revision |
