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/**************************************************************************
*
* Copyright 2005 Tungsten Graphics, Inc., Cedar Park, Texas.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
#include "main/glheader.h"
#include "main/context.h"
#include "main/enums.h"
#include "main/imports.h"
#include "main/macros.h"
#include "main/mtypes.h"
#include "swrast_setup/swrast_setup.h"
#include "swrast/swrast.h"
#include "tnl/tnl.h"
#include "brw_context.h"
#include "brw_fallback.h"
#include "intel_chipset.h"
#include "intel_fbo.h"
#include "intel_regions.h"
#include "glapi/glapi.h"
#define FILE_DEBUG_FLAG DEBUG_FALLBACKS
static GLboolean do_check_fallback(struct brw_context *brw)
{
struct intel_context *intel = &brw->intel;
GLcontext *ctx = &brw->intel.ctx;
GLuint i;
if (brw->intel.no_rast) {
DBG("FALLBACK: rasterization disabled\n");
return GL_TRUE;
}
/* _NEW_RENDERMODE
*/
if (ctx->RenderMode != GL_RENDER) {
DBG("FALLBACK: render mode\n");
return GL_TRUE;
}
/* _NEW_TEXTURE:
*/
for (i = 0; i < BRW_MAX_TEX_UNIT; i++) {
struct gl_texture_unit *texUnit = &ctx->Texture.Unit[i];
if (texUnit->_ReallyEnabled) {
struct intel_texture_object *intelObj = intel_texture_object(texUnit->_Current);
struct gl_texture_image *texImage = intelObj->base.Image[0][intelObj->firstLevel];
if (texImage->Border) {
DBG("FALLBACK: texture border\n");
return GL_TRUE;
}
}
}
/* _NEW_STENCIL
*/
if (ctx->Stencil._Enabled &&
(ctx->DrawBuffer->Name == 0 && !brw->intel.hw_stencil)) {
DBG("FALLBACK: stencil\n");
return GL_TRUE;
}
/* _NEW_BUFFERS */
if (IS_965(intel->intelScreen->deviceID) &&
!IS_G4X(intel->intelScreen->deviceID)) {
for (i = 0; i < ctx->DrawBuffer->_NumColorDrawBuffers; i++) {
struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[i];
struct intel_renderbuffer *irb = intel_renderbuffer(rb);
/* The original gen4 hardware couldn't set up WM surfaces pointing
* at an offset within a tile, which can happen when rendering to
* anything but the base level of a texture or the +X face/0 depth.
* This was fixed with the 4 Series hardware.
*
* For these original chips, you would have to make the depth and
* color destination surfaces include information on the texture
* type, LOD, face, and various limits to use them as a destination.
* I would have done this, but there's also a nasty requirement that
* the depth and the color surfaces all be of the same LOD, which
* may be a worse requirement than this alignment. (Also, we may
* want to just demote the texture to untiled, instead).
*/
if (irb->region && irb->region->tiling != I915_TILING_NONE &&
(irb->region->draw_offset & 4095)) {
DBG("FALLBACK: non-tile-aligned destination for tiled FBO\n");
return GL_TRUE;
}
}
}
return GL_FALSE;
}
static void check_fallback(struct brw_context *brw)
{
brw->intel.Fallback = do_check_fallback(brw);
}
const struct brw_tracked_state brw_check_fallback = {
.dirty = {
.mesa = _NEW_BUFFERS | _NEW_RENDERMODE | _NEW_TEXTURE | _NEW_STENCIL,
.brw = 0,
.cache = 0
},
.prepare = check_fallback
};
/* Not used:
*/
void intelFallback( struct intel_context *intel, GLuint bit, GLboolean mode )
{
}
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