From 47e3896dfd89a26abbe4ca2469c2480f3982b204 Mon Sep 17 00:00:00 2001 From: Luca Barbieri Date: Wed, 16 Feb 2011 00:14:49 +0100 Subject: gallium: implement clamping controls (ARB_color_buffer_float) BTW this changes the gallium interface. Some rather cosmetic changes by Marek. Squashed commit of the following: commit 513b37d484f0318311e84bb86ed4c93cdff71f13 Author: Luca Barbieri Date: Thu Aug 26 18:17:54 2010 +0200 mesa/st: respect fragment clamping in st_DrawPixels commit 546a31e42cad459d7a7a10ebf77fc5ffcf89e9b8 Author: Luca Barbieri Date: Thu Aug 26 18:17:28 2010 +0200 mesa/st: support fragment and vertex color clamping commit c406514a1fbee6891da4cf9ac3eebe4e4407ec13 Author: Luca Barbieri Date: Tue Aug 24 21:56:37 2010 +0200 mesa/st: expose ARB_color_buffer_float if unclamping is supported commit d0c5ea11b6f75f3da2f4ca989115f150ebc7cf8d Author: Luca Barbieri Date: Thu Aug 26 17:53:41 2010 +0200 mesa/st: use unclamped colors This assumes that Gallium is to be interpreted as given drivers the responsibility to clamp these colors if necessary. commit aef5c3c6be6edd076e955e37c80905bc447f8a82 Author: Luca Barbieri Date: Thu Aug 26 18:12:34 2010 +0200 mesa, mesa/st: handle read color clamping properly We set IMAGE_CLAMP_BIT in the caller based on _ClampReadColor, where the operation mandates it. (see the removed XXX comment. -Marek) TODO: did I get the set of operations mandating it right? commit 76bdfcfe3ff4145a1818e6cb6e227b730a5f12d8 Author: Luca Barbieri Date: Thu Aug 26 18:18:25 2010 +0200 gallium: add color clamping to the interface --- src/gallium/docs/source/cso/rasterizer.rst | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) (limited to 'src/gallium/docs') diff --git a/src/gallium/docs/source/cso/rasterizer.rst b/src/gallium/docs/source/cso/rasterizer.rst index d547055096f..e10c16ed900 100644 --- a/src/gallium/docs/source/cso/rasterizer.rst +++ b/src/gallium/docs/source/cso/rasterizer.rst @@ -7,6 +7,30 @@ The rasterizer state controls the rendering of points, lines and triangles. Attributes include polygon culling state, line width, line stipple, multisample state, scissoring and flat/smooth shading. +Linkage + +clamp_vertex_color +^^^^^^^^^^^^^^^^^^ + +If set, TGSI_SEMANTIC_COLOR registers are clamped to the [0, 1] range after +the execution of the vertex shader, before being passed to the geometry +shader or fragment shader. + +OpenGL: glClampColor(GL_CLAMP_VERTEX_COLOR) in GL 3.0 or GL_ARB_color_buffer_float + +D3D11: seems always disabled + +clamp_fragment_color +^^^^^^^^^^^^^^^^^^^^ + +Controls whether TGSI_SEMANTIC_COLOR outputs of the fragment shader +are clamped to [0, 1]. + +OpenGL: glClampColor(GL_CLAMP_FRAGMENT_COLOR) in GL 3.0 or ARB_color_buffer_float + +D3D11: seems always disabled + + Shading ------- -- cgit v1.2.3