diff options
Diffstat (limited to 'mesalib/src/mesa/state_tracker/st_atom_scissor.c')
-rw-r--r-- | mesalib/src/mesa/state_tracker/st_atom_scissor.c | 201 |
1 files changed, 101 insertions, 100 deletions
diff --git a/mesalib/src/mesa/state_tracker/st_atom_scissor.c b/mesalib/src/mesa/state_tracker/st_atom_scissor.c index 495a3ea25..eb1387778 100644 --- a/mesalib/src/mesa/state_tracker/st_atom_scissor.c +++ b/mesalib/src/mesa/state_tracker/st_atom_scissor.c @@ -1,100 +1,101 @@ -/**************************************************************************
- *
- * 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.
- *
- **************************************************************************/
-
- /*
- * Authors:
- * Keith Whitwell <keith@tungstengraphics.com>
- */
-
-
-#include "main/macros.h"
-#include "st_context.h"
-#include "pipe/p_context.h"
-#include "st_atom.h"
-
-
-/**
- * Scissor depends on the scissor box, and the framebuffer dimensions.
- */
-static void
-update_scissor( struct st_context *st )
-{
- struct pipe_scissor_state scissor;
- const struct gl_framebuffer *fb = st->ctx->DrawBuffer;
- GLint miny, maxy;
-
- scissor.minx = 0;
- scissor.miny = 0;
- scissor.maxx = fb->Width;
- scissor.maxy = fb->Height;
-
- if (st->ctx->Scissor.Enabled) {
- /* need to be careful here with xmax or ymax < 0 */
- GLint xmax = MAX2(0, st->ctx->Scissor.X + st->ctx->Scissor.Width);
- GLint ymax = MAX2(0, st->ctx->Scissor.Y + st->ctx->Scissor.Height);
-
- if (st->ctx->Scissor.X > (GLint)scissor.minx)
- scissor.minx = st->ctx->Scissor.X;
- if (st->ctx->Scissor.Y > (GLint)scissor.miny)
- scissor.miny = st->ctx->Scissor.Y;
-
- if (xmax < (GLint) scissor.maxx)
- scissor.maxx = xmax;
- if (ymax < (GLint) scissor.maxy)
- scissor.maxy = ymax;
-
- /* check for null space */
- if (scissor.minx >= scissor.maxx || scissor.miny >= scissor.maxy)
- scissor.minx = scissor.miny = scissor.maxx = scissor.maxy = 0;
- }
-
- /* Now invert Y if needed.
- * Gallium drivers use the convention Y=0=top for surfaces.
- */
- if (st_fb_orientation(fb) == Y_0_TOP) {
- miny = fb->Height - scissor.maxy;
- maxy = fb->Height - scissor.miny;
- scissor.miny = miny;
- scissor.maxy = maxy;
- }
-
- if (memcmp(&scissor, &st->state.scissor, sizeof(scissor)) != 0) {
- /* state has changed */
- st->state.scissor = scissor; /* struct copy */
- st->pipe->set_scissor_state(st->pipe, &scissor); /* activate */
- }
-}
-
-
-const struct st_tracked_state st_update_scissor = {
- "st_update_scissor", /* name */
- { /* dirty */
- (_NEW_SCISSOR | _NEW_BUFFERS), /* mesa */
- 0, /* st */
- },
- update_scissor /* 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. + * + **************************************************************************/ + + /* + * Authors: + * Keith Whitwell <keith@tungstengraphics.com> + */ + + +#include "main/macros.h" +#include "st_context.h" +#include "pipe/p_context.h" +#include "st_atom.h" + + +/** + * Scissor depends on the scissor box, and the framebuffer dimensions. + */ +static void +update_scissor( struct st_context *st ) +{ + struct pipe_scissor_state scissor; + const struct gl_context *ctx = st->ctx; + const struct gl_framebuffer *fb = ctx->DrawBuffer; + GLint miny, maxy; + + scissor.minx = 0; + scissor.miny = 0; + scissor.maxx = fb->Width; + scissor.maxy = fb->Height; + + if (ctx->Scissor.Enabled) { + /* need to be careful here with xmax or ymax < 0 */ + GLint xmax = MAX2(0, ctx->Scissor.X + ctx->Scissor.Width); + GLint ymax = MAX2(0, ctx->Scissor.Y + ctx->Scissor.Height); + + if (ctx->Scissor.X > (GLint)scissor.minx) + scissor.minx = ctx->Scissor.X; + if (ctx->Scissor.Y > (GLint)scissor.miny) + scissor.miny = ctx->Scissor.Y; + + if (xmax < (GLint) scissor.maxx) + scissor.maxx = xmax; + if (ymax < (GLint) scissor.maxy) + scissor.maxy = ymax; + + /* check for null space */ + if (scissor.minx >= scissor.maxx || scissor.miny >= scissor.maxy) + scissor.minx = scissor.miny = scissor.maxx = scissor.maxy = 0; + } + + /* Now invert Y if needed. + * Gallium drivers use the convention Y=0=top for surfaces. + */ + if (st_fb_orientation(fb) == Y_0_TOP) { + miny = fb->Height - scissor.maxy; + maxy = fb->Height - scissor.miny; + scissor.miny = miny; + scissor.maxy = maxy; + } + + if (memcmp(&scissor, &st->state.scissor, sizeof(scissor)) != 0) { + /* state has changed */ + st->state.scissor = scissor; /* struct copy */ + st->pipe->set_scissor_state(st->pipe, &scissor); /* activate */ + } +} + + +const struct st_tracked_state st_update_scissor = { + "st_update_scissor", /* name */ + { /* dirty */ + (_NEW_SCISSOR | _NEW_BUFFERS), /* mesa */ + 0, /* st */ + }, + update_scissor /* update */ +}; |