| /************************************************************************** |
| * |
| * 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. |
| * |
| **************************************************************************/ |
| |
| |
| #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++) |
| { |
| float 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]); |
| } |
| |
| |
| const struct st_tracked_state st_update_viewport = { |
| "st_update_viewport", /* name */ |
| { /* dirty */ |
| _NEW_BUFFERS | _NEW_VIEWPORT, /* mesa */ |
| 0, /* st */ |
| }, |
| update_viewport /* update */ |
| }; |