| Summary: | [i965 FBO GEM] render to 1D texture work incorrecly | ||
|---|---|---|---|
| Product: | Mesa | Reporter: | Shuang He <shuang.he> |
| Component: | Drivers/DRI/i965 | Assignee: | Eric Anholt <eric> |
| Status: | RESOLVED NOTABUG | QA Contact: | |
| Severity: | normal | ||
| Priority: | medium | CC: | dri-devel |
| Version: | unspecified | ||
| Hardware: | Other | ||
| OS: | Linux (All) | ||
| Whiteboard: | |||
| i915 platform: | i915 features: | ||
| Attachments: | test case | ||
|
Description
Shuang He
2007-12-20 19:18:41 UTC
Created attachment 13263 [details]
test case
this test case attach a 1d texture image to FBO's COLOR_ATTACHMENT0
render to this 1d texture through FBO
then apply the the 1d texture
a small red 2x2 rectangle should be rendered.
this issue doesn't happen on i915 This issue still exists with latest GEM Not a release blocker. Not a regression, and not likely to be commonly used. this issue still exists with: Kernel_version: 2.6.29-rc7 Libdrm: (master)2e2e8575b1ed4703653a72ac2b60b75316c388d7 Mesa: (mesa_7_4_branch)a8528a2e8653b5237c1d1d66fe98c6e031d007f9 Xserver: (server-1.6-branch)60c161545af80eb78eb790a05bde79409dfdf16e Xf86_video_intel: (2.7)238c2c40afd9f8b61479b8640d53f20d52fd7ddf Kernel: (for-airlied)dc529a4fe1ae4667c819437a94185e8581e1e680 Nothing appears to be wrong with 1D FBOs. The test is being overly picky about the line rasterization -- replace the GL_LINES with a GL_TRIANGLE_FAN covering those pixels, and it's fine. Even with GL_LINES and increasing Y by some epsilon works. And the spec says we're OK: OpenGL 2.1 spec section 3.4: The coordinates of a fragment produced by the algorithm may not deviate by more than one unit in either x or y window coordinates from a corresponding fragment produced by the diamond-exit rule. |
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