View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0032238 | Open CASCADE | OCCT:Visualization | public | 2021-03-22 20:42 | 2023-08-01 15:09 |
| Reporter | kgv | Assigned To | |||
| Priority | normal | Severity | minor | ||
| Status | new | Resolution | open | ||
| Product Version | 7.5.0 | ||||
| Target Version | Unscheduled | ||||
| Summary | 0032238: Visualization, TKOpenGl - GLSL compilation errors when using ANGLE (OpenGL ES 2.0) with disabled highp | ||||
| Description | Disabling OpenGl_Context::hasHighp leads to the following errors:TKOpenGl | Type: Error | ID: 0 | Severity: High | Message: Failed to link program object [occt_unlit0000]! Linker log: Precisions for uniform 'occWorldViewMatrix' differ between vertex and fragment shaders The reason is that Declarations.glsl declares matrix uniforms for both Vertex and Fragment shaders. And when highp is unsupported by hardware (very old OpenGL ES 2.0), the precision qualifiers of the same uniform become different. In practice, the uniform is used only within vertex shader, so that Android hardware tolerated such syntax - unused uniform variables have been removed from Fragment shader before validation. Issue happened only within Phong GLSL program, which has done matrix calculations in Framment shader until 0032042. ANGLE library is, however, more strict about GLSL syntax and explicitly rejects such shaders. | ||||
| Steps To Reproduce | pload MODELING VISUALIZATION vdriver -load GLES vcaps -maxVersion 2 0 # there is no such flag yet #vcaps -highp 0 vinit View1 | ||||
| Tags | No tags attached. | ||||
| Test case number | |||||
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2021-03-22 20:42 | kgv | New Issue | |
| 2021-03-22 20:42 | kgv | Assigned To | => kgv |
| 2021-03-22 20:42 | kgv | Relationship added | related to 0032042 |
| 2021-03-22 20:43 | kgv | Summary | Visualization, TKOpenGl - GLSL compilation errors when using ANGLE (OpenGL ES 2.0) with disable highp => Visualization, TKOpenGl - GLSL compilation errors when using ANGLE (OpenGL ES 2.0) with disabled highp |
| 2021-03-22 20:45 | kgv | Steps to Reproduce Updated | |
| 2021-08-24 14:51 | kgv | Target Version | 7.6.0 => 7.7.0 |
| 2022-08-17 11:55 | kgv | Target Version | 7.7.0 => 7.8.0 |
| 2022-10-19 15:49 |
|
Assigned To | kgv => vpozdyayev |
| 2023-08-01 15:09 | dpasukhi | Target Version | 7.8.0 => Unscheduled |
