diff options
Diffstat (limited to 'mesalib/src/mesa/state_tracker/st_atom_viewport.c')
-rw-r--r-- | mesalib/src/mesa/state_tracker/st_atom_viewport.c | 188 |
1 files changed, 94 insertions, 94 deletions
diff --git a/mesalib/src/mesa/state_tracker/st_atom_viewport.c b/mesalib/src/mesa/state_tracker/st_atom_viewport.c index df26fb4a6..133cc49ea 100644 --- a/mesalib/src/mesa/state_tracker/st_atom_viewport.c +++ b/mesalib/src/mesa/state_tracker/st_atom_viewport.c @@ -1,94 +1,94 @@ -/**************************************************************************
- *
- * Copyright 2007 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/context.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;
-
- /* _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
- */
- {
- GLfloat x = (GLfloat)ctx->Viewport.X;
- GLfloat y = (GLfloat)ctx->Viewport.Y;
- GLfloat z = ctx->Viewport.Near;
- GLfloat half_width = (GLfloat)ctx->Viewport.Width * 0.5f;
- GLfloat half_height = (GLfloat)ctx->Viewport.Height * 0.5f;
- GLfloat half_depth = (GLfloat)(ctx->Viewport.Far - ctx->Viewport.Near) * 0.5f;
-
- st->state.viewport.scale[0] = half_width;
- st->state.viewport.scale[1] = half_height * yScale;
- st->state.viewport.scale[2] = half_depth;
- st->state.viewport.scale[3] = 1.0;
-
- st->state.viewport.translate[0] = half_width + x;
- st->state.viewport.translate[1] = (half_height + y) * yScale + yBias;
- st->state.viewport.translate[2] = half_depth + z;
- st->state.viewport.translate[3] = 0.0;
-
- cso_set_viewport(st->cso_context, &st->state.viewport);
- }
-}
-
-
-const struct st_tracked_state st_update_viewport = {
- "st_update_viewport", /* name */
- { /* dirty */
- _NEW_BUFFERS | _NEW_VIEWPORT, /* mesa */
- 0, /* st */
- },
- update_viewport /* update */
-};
+/************************************************************************** + * + * Copyright 2007 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/context.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; + + /* _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 + */ + { + GLfloat x = (GLfloat)ctx->Viewport.X; + GLfloat y = (GLfloat)ctx->Viewport.Y; + GLfloat z = ctx->Viewport.Near; + GLfloat half_width = (GLfloat)ctx->Viewport.Width * 0.5f; + GLfloat half_height = (GLfloat)ctx->Viewport.Height * 0.5f; + GLfloat half_depth = (GLfloat)(ctx->Viewport.Far - ctx->Viewport.Near) * 0.5f; + + st->state.viewport.scale[0] = half_width; + st->state.viewport.scale[1] = half_height * yScale; + st->state.viewport.scale[2] = half_depth; + st->state.viewport.scale[3] = 1.0; + + st->state.viewport.translate[0] = half_width + x; + st->state.viewport.translate[1] = (half_height + y) * yScale + yBias; + st->state.viewport.translate[2] = half_depth + z; + st->state.viewport.translate[3] = 0.0; + + cso_set_viewport(st->cso_context, &st->state.viewport); + } +} + + +const struct st_tracked_state st_update_viewport = { + "st_update_viewport", /* name */ + { /* dirty */ + _NEW_BUFFERS | _NEW_VIEWPORT, /* mesa */ + 0, /* st */ + }, + update_viewport /* update */ +}; |