0,0 → 1,92 |
/************************************************************************** |
* |
* Copyright 2007 VMware, Inc. |
* 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 VMWARE 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. |
* |
**************************************************************************/ |
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#include "main/context.h" |
#include "main/viewport.h" |
#include "st_context.h" |
#include "st_atom.h" |
#include "pipe/p_context.h" |
#include "cso_cache/cso_context.h" |
|
/** |
* Update the viewport transformation matrix. Depends on: |
* - viewport pos/size |
* - depthrange |
* - window pos/size or FBO size |
*/ |
static void |
update_viewport( struct st_context *st ) |
{ |
struct gl_context *ctx = st->ctx; |
GLfloat yScale, yBias; |
unsigned i; |
/* _NEW_BUFFERS |
*/ |
if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) { |
/* Drawing to a window. The corresponding gallium surface uses |
* Y=0=TOP but OpenGL is Y=0=BOTTOM. So we need to invert the viewport. |
*/ |
yScale = -1; |
yBias = (GLfloat)ctx->DrawBuffer->Height; |
} |
else { |
/* Drawing to an FBO where Y=0=BOTTOM, like OpenGL - don't invert */ |
yScale = 1.0; |
yBias = 0.0; |
} |
|
/* _NEW_VIEWPORT |
*/ |
for (i = 0; i < ctx->Const.MaxViewports; i++) |
{ |
double scale[3], translate[3]; |
_mesa_get_viewport_xform(ctx, i, scale, translate); |
|
st->state.viewport[i].scale[0] = scale[0]; |
st->state.viewport[i].scale[1] = scale[1] * yScale; |
st->state.viewport[i].scale[2] = scale[2]; |
|
st->state.viewport[i].translate[0] = translate[0]; |
st->state.viewport[i].translate[1] = translate[1] * yScale + yBias; |
st->state.viewport[i].translate[2] = translate[2]; |
} |
|
cso_set_viewport(st->cso_context, &st->state.viewport[0]); |
if (ctx->Const.MaxViewports > 1) |
st->pipe->set_viewport_states(st->pipe, 1, ctx->Const.MaxViewports - 1, &st->state.viewport[1]); |
} |
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const struct st_tracked_state st_update_viewport = { |
"st_update_viewport", /* name */ |
{ /* dirty */ |
_NEW_BUFFERS | _NEW_VIEWPORT, /* mesa */ |
0, /* st */ |
}, |
update_viewport /* update */ |
}; |