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i965: Set all the supported scissor rectangles for GEN7

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Currently MaxViewports is still 1, so this won't affect any change.

v2: Minor code reformatting suggested by Ken.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Ian Romanick 2014-01-08 12:14:11 -08:00
parent a2b946cb35
commit 2c27f1d47a
1 changed files with 33 additions and 27 deletions
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60
src/mesa/drivers/dri/i965/gen6_scissor_state.c
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@ -30,6 +30,7 @@
#include "brw_defines.h"
#include "intel_batchbuffer.h"
#include "main/fbobject.h"
#include "main/framebuffer.h"
static void
gen6_upload_scissor_state(struct brw_context *brw)
@ -40,7 +41,8 @@ gen6_upload_scissor_state(struct brw_context *brw)
uint32_t scissor_state_offset;
scissor = brw_state_batch(brw, AUB_TRACE_SCISSOR_STATE,
sizeof(*scissor), 32, &scissor_state_offset);
sizeof(*scissor) * ctx->Const.MaxViewports, 32,
&scissor_state_offset);
/* _NEW_SCISSOR | _NEW_BUFFERS | _NEW_VIEWPORT */
@ -51,33 +53,37 @@ gen6_upload_scissor_state(struct brw_context *brw)
* 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;
}
for (unsigned i = 0; i < ctx->Const.MaxViewports; i++) {
int bbox[4];
_mesa_scissor_bounding_box(ctx, ctx->DrawBuffer, i, bbox);
if (bbox[0] == bbox[1] || bbox[2] == bbox[3]) {
/* 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[i].xmin = 1;
scissor[i].xmax = 0;
scissor[i].ymin = 1;
scissor[i].ymax = 0;
} else if (render_to_fbo) {
/* texmemory: Y=0=bottom */
scissor[i].xmin = bbox[0];
scissor[i].xmax = bbox[1] - 1;
scissor[i].ymin = bbox[2];
scissor[i].ymax = bbox[3] - 1;
}
else {
/* memory: Y=0=top */
scissor[i].xmin = bbox[0];
scissor[i].xmax = bbox[1] - 1;
scissor[i].ymin = ctx->DrawBuffer->Height - bbox[3];
scissor[i].ymax = ctx->DrawBuffer->Height - bbox[2] - 1;
}
}
BEGIN_BATCH(2);
OUT_BATCH(_3DSTATE_SCISSOR_STATE_POINTERS << 16 | (2 - 2));
OUT_BATCH(scissor_state_offset);