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i965: Enable ARB_viewport_array

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v2 (idr): Only enable the extension on GEN7+ w/core profile because it
requires geometry shaders.

v3 (idr): Add some casting to fix setting of ViewportBounds.Min.
Negating an unsigned value, then casting to float doesn't do what you
might think it does.

Signed-off-by: Courtney Goeltzenleuchter <courtney@LunarG.com>
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Courtney Goeltzenleuchter 2013-11-13 13:15:19 -07:00 • committed by Ian Romanick
parent d3ee8ba346
commit 7837f425e7
2 changed files with 17 additions and 0 deletions
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11
src/mesa/drivers/dri/i965/brw_context.c
View file

@ -474,6 +474,17 @@ brw_initialize_context_constants(struct brw_context *brw)
}
ctx->ShaderCompilerOptions[MESA_SHADER_VERTEX].PreferDP4 = true;
/* ARB_viewport_array */
if (brw->gen >= 7 && ctx->API == API_OPENGL_CORE) {
ctx->Const.MaxViewports = GEN7_NUM_VIEWPORTS;
ctx->Const.ViewportSubpixelBits = 0;
/* Cast to float before negating becuase MaxViewportWidth is unsigned.
*/
ctx->Const.ViewportBounds.Min = -(float)ctx->Const.MaxViewportWidth;
ctx->Const.ViewportBounds.Max = ctx->Const.MaxViewportWidth;
}
}
/**

6
src/mesa/drivers/dri/i965/intel_extensions.c
View file

@ -294,6 +294,12 @@ intelInitExtensions(struct gl_context *ctx)
ctx->Extensions.ARB_transform_feedback_instanced = true;
ctx->Extensions.ARB_draw_indirect = true;
}
/* Only enable this in core profile because other parts of Mesa behave
* slightly differently when the extension is enabled.
*/
if (ctx->API == API_OPENGL_CORE)
ctx->Extensions.ARB_viewport_array = true;
}
if (brw->gen == 5 || can_write_oacontrol(brw))