[Bug 15644] Morrowind: Waterplane/sprite flickering with ORM=fbo

http://bugs.winehq.org/show_bug.cgi?id=15644

--- Comment #19 from Tobias Jakobi   2008-10-19 13:54:39 ---
(In reply to comment #18)
> How does this work? It should fix the GL error, but chances are it won't solve
> the rest of the problem.

Hi Henri,

the patch does work, however with a slight modification. You forgot to enable
ARB_texture_rectangle in the GLSL program.

const char *blt_pshader_RECT[] = {
    "#version 120\n"
    "#extension GL_ARB_texture_rectangle : enable\n"
    "uniform sampler2DRect sampler;\n"
    "void main(void)\n"
    "{\n"
    "    gl_FragDepth = texture2DRect(sampler, gl_TexCoord[0].xy).x;\n"
    "}\n"
};

This is how it should look like. Without this modification I get again a lot of
GL errors from shader_glsl_deselect_depth_blt.

But guess what. After modifying the patch it works. Which means the GL errors
are gone and the scene renders without any flickering and disappearing
sprites/waterplane.

Performance also increased. Going to check what kind of difference that makes
in Max Payne 2.

@Jan: Check this out on your ATI and report if it helps.

Greets,
Tobias