OpenHarmony/third_party_mesa3d
2
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Implement point/line quad clipping. Not quite as efficient as it probably could be, but sufficient for now.

Browse Source
This commit is contained in:
Brian
2007-07-27 10:10:49 -06:00
parent 6abdad28f6
commit 78ea9cee0d
1 changed files with 70 additions and 19 deletions
Download Patch File Download Diff File Expand all files Collapse all files

89
src/mesa/pipe/softpipe/sp_prim_setup.c
View File

@@ -43,18 +43,6 @@
#include "sp_prim_setup.h"
/**
* Emit/render a quad.
* This passes the quad to the first stage of per-fragment operations.
*/
static INLINE void
quad_emit(struct softpipe_context *sp, struct quad_header *quad)
{
sp->quad.first->run(sp->quad.first, quad);
}
/**
* Triangle edge info
*/
@@ -103,6 +91,8 @@ struct setup_stage {
GLuint y_flags;
GLuint mask; /**< mask of MASK_BOTTOM/TOP_LEFT/RIGHT bits */
} span;
struct pipe_scissor_state scissor;
};
@@ -116,6 +106,46 @@ static inline struct setup_stage *setup_stage( struct draw_stage *stage )
}
/**
* Clip setup->quad against the scissor/surface bounds.
*/
static INLINE void
quad_clip(struct setup_stage *setup)
{
if (setup->quad.x0 >= setup->scissor.maxx ||
setup->quad.y0 >= setup->scissor.maxy ||
setup->quad.x0 + 1 < setup->scissor.minx ||
setup->quad.y0 + 1 < setup->scissor.miny) {
/* totally clipped */
setup->quad.mask = 0x0;
return;
}
if (setup->quad.x0 < setup->scissor.minx)
setup->quad.mask &= (MASK_BOTTOM_RIGHT | MASK_TOP_RIGHT);
if (setup->quad.y0 < setup->scissor.miny)
setup->quad.mask &= (MASK_TOP_LEFT | MASK_TOP_RIGHT);
if (setup->quad.x0 == setup->scissor.maxx - 1)
setup->quad.mask &= (MASK_BOTTOM_LEFT | MASK_TOP_LEFT);
if (setup->quad.y0 == setup->scissor.maxy - 1)
setup->quad.mask &= (MASK_BOTTOM_LEFT | MASK_BOTTOM_RIGHT);
}
/**
* Emit/render a quad.
* This passes the quad to the first stage of per-fragment operations.
*/
static INLINE void
quad_emit(struct setup_stage *setup)
{
quad_clip(setup);
if (setup->quad.mask) {
struct softpipe_context *sp = setup->softpipe;
sp->quad.first->run(sp->quad.first, &setup->quad);
}
}
/**
* Given an X or Y coordinate, return the block/quad coordinate that it
* belongs to.
@@ -137,7 +167,7 @@ static void run_shader_block( struct setup_stage *setup,
setup->quad.y0 = y;
setup->quad.mask = mask;
quad_emit(setup->softpipe, &setup->quad);
quad_emit(setup);
}
@@ -694,8 +724,8 @@ plot(struct setup_stage *setup, GLint x, GLint y)
{
/* flush prev quad, start new quad */
if (setup->quad.x0 != -1)
quad_emit(setup->softpipe, &setup->quad);
if (setup->quad.x0 != -1)
quad_emit(setup);
setup->quad.x0 = quadX;
setup->quad.y0 = quadY;
@@ -832,7 +862,7 @@ setup_line(struct draw_stage *stage, struct prim_header *prim)
/* draw final quad */
if (setup->quad.mask) {
quad_emit(setup->softpipe, &setup->quad);
quad_emit(setup);
}
}
@@ -889,7 +919,7 @@ setup_point(struct draw_stage *stage, struct prim_header *prim)
setup->quad.x0 = x - ix;
setup->quad.y0 = y - iy;
setup->quad.mask = (1 << ix) << (2 * iy);
quad_emit(setup->softpipe, &setup->quad);
quad_emit(setup);
}
else {
const GLint ixmin = block((GLint) (x - halfSize));
@@ -951,7 +981,7 @@ setup_point(struct draw_stage *stage, struct prim_header *prim)
if (setup->quad.mask) {
setup->quad.x0 = ix;
setup->quad.y0 = iy;
quad_emit( setup->softpipe, &setup->quad );
quad_emit(setup);
}
}
}
@@ -985,7 +1015,7 @@ setup_point(struct draw_stage *stage, struct prim_header *prim)
if (setup->quad.mask) {
setup->quad.x0 = ix;
setup->quad.y0 = iy;
quad_emit( setup->softpipe, &setup->quad );
quad_emit(setup);
}
}
}
@@ -1001,6 +1031,27 @@ static void setup_begin( struct draw_stage *stage )
setup->quad.nr_attrs = setup->softpipe->nr_frag_attrs;
/* compute scissor/drawing bounds.
* XXX we should probably move this into the sp_state_derived.c file
* and only compute when scissor or setup state changes.
*/
{
const struct softpipe_context *sp = setup->softpipe;
const struct pipe_surface *surf = sp->cbuf;
if (sp->setup.scissor) {
setup->scissor.minx = MAX2(sp->scissor.minx, 0);
setup->scissor.miny = MAX2(sp->scissor.miny, 0);
setup->scissor.maxx = MIN2(sp->scissor.maxx, surf->width - 1);
setup->scissor.maxy = MIN2(sp->scissor.maxy, surf->height - 1);
}
else {
setup->scissor.minx = 0;
setup->scissor.miny = 0;
setup->scissor.maxx = surf->width - 1;
setup->scissor.maxy = surf->height - 1;
}
}
/*
* XXX this is where we might map() the renderbuffers to begin
* s/w rendering.