| 0,0 → 1,106 |
|---|
| /************************************************************************** |
| * |
| * 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. |
| * |
| **************************************************************************/ |
| |
| /* |
| * Authors: |
| * Keith Whitwell <keithw@vmware.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[PIPE_MAX_VIEWPORTS]; |
| const struct gl_context *ctx = st->ctx; |
| const struct gl_framebuffer *fb = ctx->DrawBuffer; |
| GLint miny, maxy; |
| unsigned i; |
| bool changed = false; |
| for (i = 0 ; i < ctx->Const.MaxViewports; i++) { |
| scissor[i].minx = 0; |
| scissor[i].miny = 0; |
| scissor[i].maxx = fb->Width; |
| scissor[i].maxy = fb->Height; |
| |
| if (ctx->Scissor.EnableFlags & (1 << i)) { |
| /* need to be careful here with xmax or ymax < 0 */ |
| GLint xmax = MAX2(0, ctx->Scissor.ScissorArray[i].X + ctx->Scissor.ScissorArray[i].Width); |
| GLint ymax = MAX2(0, ctx->Scissor.ScissorArray[i].Y + ctx->Scissor.ScissorArray[i].Height); |
| |
| if (ctx->Scissor.ScissorArray[i].X > (GLint)scissor[i].minx) |
| scissor[i].minx = ctx->Scissor.ScissorArray[i].X; |
| if (ctx->Scissor.ScissorArray[i].Y > (GLint)scissor[i].miny) |
| scissor[i].miny = ctx->Scissor.ScissorArray[i].Y; |
| |
| if (xmax < (GLint) scissor[i].maxx) |
| scissor[i].maxx = xmax; |
| if (ymax < (GLint) scissor[i].maxy) |
| scissor[i].maxy = ymax; |
| |
| /* check for null space */ |
| if (scissor[i].minx >= scissor[i].maxx || scissor[i].miny >= scissor[i].maxy) |
| scissor[i].minx = scissor[i].miny = scissor[i].maxx = scissor[i].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[i].maxy; |
| maxy = fb->Height - scissor[i].miny; |
| scissor[i].miny = miny; |
| scissor[i].maxy = maxy; |
| } |
| |
| if (memcmp(&scissor[i], &st->state.scissor[i], sizeof(scissor[0])) != 0) { |
| /* state has changed */ |
| st->state.scissor[i] = scissor[i]; /* struct copy */ |
| changed = true; |
| } |
| } |
| if (changed) |
| st->pipe->set_scissor_states(st->pipe, 0, ctx->Const.MaxViewports, 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 */ |
| }; |