| 0,0 → 1,94 |
|---|
| /* |
| * Copyright © 2009 Intel Corporation |
| * |
| * 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, sublicense, |
| * 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 NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS 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: |
| * Eric Anholt <eric@anholt.net> |
| * |
| */ |
| |
| #include "brw_context.h" |
| #include "brw_state.h" |
| #include "brw_defines.h" |
| #include "intel_batchbuffer.h" |
| #include "main/fbobject.h" |
| |
| static void |
| gen6_upload_scissor_state(struct brw_context *brw) |
| { |
| struct gl_context *ctx = &brw->ctx; |
| const bool render_to_fbo = _mesa_is_user_fbo(ctx->DrawBuffer); |
| struct gen6_scissor_rect *scissor; |
| uint32_t scissor_state_offset; |
| |
| scissor = brw_state_batch(brw, AUB_TRACE_SCISSOR_STATE, |
| sizeof(*scissor), 32, &scissor_state_offset); |
| |
| /* _NEW_SCISSOR | _NEW_BUFFERS | _NEW_VIEWPORT */ |
| |
| /* The scissor only needs to handle the intersection of drawable and |
| * scissor rect. Clipping to the boundaries of static shared buffers |
| * for front/back/depth is covered by looping over cliprects in brw_draw.c. |
| * |
| * Note that the hardware's coordinates are inclusive, while Mesa's min is |
| * inclusive but max is exclusive. |
| */ |
| if (ctx->DrawBuffer->_Xmin == ctx->DrawBuffer->_Xmax || |
| ctx->DrawBuffer->_Ymin == ctx->DrawBuffer->_Ymax) { |
| /* If the scissor was out of bounds and got clamped to 0 |
| * width/height at the bounds, the subtraction of 1 from |
| * maximums could produce a negative number and thus not clip |
| * anything. Instead, just provide a min > max scissor inside |
| * the bounds, which produces the expected no rendering. |
| */ |
| scissor->xmin = 1; |
| scissor->xmax = 0; |
| scissor->ymin = 1; |
| scissor->ymax = 0; |
| } else if (render_to_fbo) { |
| /* texmemory: Y=0=bottom */ |
| scissor->xmin = ctx->DrawBuffer->_Xmin; |
| scissor->xmax = ctx->DrawBuffer->_Xmax - 1; |
| scissor->ymin = ctx->DrawBuffer->_Ymin; |
| scissor->ymax = ctx->DrawBuffer->_Ymax - 1; |
| } |
| else { |
| /* memory: Y=0=top */ |
| scissor->xmin = ctx->DrawBuffer->_Xmin; |
| scissor->xmax = ctx->DrawBuffer->_Xmax - 1; |
| scissor->ymin = ctx->DrawBuffer->Height - ctx->DrawBuffer->_Ymax; |
| scissor->ymax = ctx->DrawBuffer->Height - ctx->DrawBuffer->_Ymin - 1; |
| } |
| |
| BEGIN_BATCH(2); |
| OUT_BATCH(_3DSTATE_SCISSOR_STATE_POINTERS << 16 | (2 - 2)); |
| OUT_BATCH(scissor_state_offset); |
| ADVANCE_BATCH(); |
| } |
| |
| const struct brw_tracked_state gen6_scissor_state = { |
| .dirty = { |
| .mesa = _NEW_SCISSOR | _NEW_BUFFERS | _NEW_VIEWPORT, |
| .brw = BRW_NEW_BATCH, |
| .cache = 0, |
| }, |
| .emit = gen6_upload_scissor_state, |
| }; |