150 lines
5.2 KiB
C
150 lines
5.2 KiB
C
/**************************************************************************
|
|
*
|
|
* 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 "main/framebuffer.h"
|
|
#include "st_context.h"
|
|
#include "pipe/p_context.h"
|
|
#include "st_atom.h"
|
|
#include "st_util.h"
|
|
|
|
|
|
/**
|
|
* Scissor depends on the scissor box, and the framebuffer dimensions.
|
|
*/
|
|
void
|
|
st_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;
|
|
const unsigned int fb_width = _mesa_geometric_width(fb);
|
|
const unsigned int fb_height = _mesa_geometric_height(fb);
|
|
GLint miny, maxy;
|
|
unsigned i;
|
|
bool changed = false;
|
|
|
|
if (!ctx->Scissor.EnableFlags)
|
|
return;
|
|
|
|
for (i = 0 ; i < st->state.num_viewports; 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->state.fb_orientation == 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) {
|
|
struct pipe_context *pipe = st->pipe;
|
|
|
|
pipe->set_scissor_states(pipe, 0, st->state.num_viewports, scissor);
|
|
}
|
|
}
|
|
|
|
void
|
|
st_update_window_rectangles(struct st_context *st)
|
|
{
|
|
struct pipe_scissor_state new_rects[PIPE_MAX_WINDOW_RECTANGLES];
|
|
const struct gl_context *ctx = st->ctx;
|
|
const struct gl_scissor_attrib *scissor = &ctx->Scissor;
|
|
unsigned i;
|
|
bool changed = false;
|
|
unsigned num_rects = scissor->NumWindowRects;
|
|
bool include = scissor->WindowRectMode == GL_INCLUSIVE_EXT;
|
|
|
|
if (ctx->DrawBuffer == ctx->WinSysDrawBuffer) {
|
|
num_rects = 0;
|
|
include = false;
|
|
}
|
|
for (i = 0; i < num_rects; i++) {
|
|
const struct gl_scissor_rect *rect = &scissor->WindowRects[i];
|
|
new_rects[i].minx = MAX2(rect->X, 0);
|
|
new_rects[i].miny = MAX2(rect->Y, 0);
|
|
new_rects[i].maxx = MAX2(rect->X + rect->Width, 0);
|
|
new_rects[i].maxy = MAX2(rect->Y + rect->Height, 0);
|
|
}
|
|
if (num_rects > 0 && memcmp(new_rects, st->state.window_rects.rects,
|
|
num_rects * sizeof(struct pipe_scissor_state))) {
|
|
memcpy(st->state.window_rects.rects, new_rects,
|
|
num_rects * sizeof(struct pipe_scissor_state));
|
|
changed = true;
|
|
}
|
|
if (st->state.window_rects.num != num_rects) {
|
|
st->state.window_rects.num = num_rects;
|
|
changed = true;
|
|
}
|
|
if (st->state.window_rects.include != include) {
|
|
st->state.window_rects.include = include;
|
|
changed = true;
|
|
}
|
|
if (changed)
|
|
st->pipe->set_window_rectangles(
|
|
st->pipe, include, num_rects, new_rects);
|
|
}
|