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Copy pathSWprogram.c
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670 lines (570 loc) · 26.8 KB
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#include"SWprogram.h"
#include<assert.h>
#include<string.h>
#include"SWcontext.h"
#include"SWframebuffer.h"
#include"SWrasterize.h"
#include"SWzbuffer.h"
sw_inlineSWint_swTypeSize(constSWenumtype) {
SWintsize=0;
switch (type) {
caseSW_UNSIGNED_BYTE:
size=sizeof(SWubyte);
break;
caseSW_UNSIGNED_SHORT:
size=sizeof(SWushort);
break;
caseSW_UNSIGNED_INT:
size=sizeof(SWuint);
break;
caseSW_INT:
size=sizeof(SWint);
break;
caseSW_FLOAT:
size=sizeof(SWfloat);
break;
caseSW_VEC2:
size=2*sizeof(SWfloat);
break;
caseSW_VEC3:
size=3*sizeof(SWfloat);
break;
caseSW_VEC4:
size=4*sizeof(SWfloat);
break;
caseSW_MAT3:
size=9*sizeof(SWfloat);
break;
caseSW_MAT4:
size=16*sizeof(SWfloat);
break;
default:
assert(0);
}
returnsize;
}
sw_inlineSWuint_swGetIndex(constSWenumindex_type, constSWuintj,
constvoid*indices) {
SWuintndx=0;
if (index_type==SW_UNSIGNED_BYTE) {
ndx= (SWuint) * ((SWubyte*)indices+j);
} elseif (index_type==SW_UNSIGNED_SHORT) {
ndx= (SWuint) * ((SWushort*)indices+j);
} elseif (index_type==SW_UNSIGNED_INT) {
ndx=*((SWuint*)indices+j);
} else {
assert(0);
}
returnndx;
}
sw_inlineSWfloat_swCurveTolerance(SWcontext*ctx, SWframebuffer*f) {
return (ctx->curve_tolerance / f->w) * (ctx->curve_tolerance / f->h);
}
/**************************************************************************************************/
voidswProgInit(SWprogram*p, SWubyte*uniform_buf, vtx_shader_procv_proc,
frag_shader_procf_proc, SWintv_out_floats) {
memset(p, 0, sizeof(SWprogram));
p->uniform_buf=uniform_buf;
p->v_proc=v_proc;
p->f_proc=f_proc;
p->v_out_size=4+v_out_floats;
memset(p->vertex_attributes, 0, SW_MAX_VTX_ATTRIBS*sizeof(SWvtx_attribute));
}
voidswProgDestroy(SWprogram*p) { memset(p, 0, sizeof(SWprogram)); }
voidswProgSetVtxAttribPointer(SWprogram*p, SWcontext*ctx, constSWuintindex,
constSWintsize, constSWintstride,
constvoid*pointer) {
assert(index<sizeof(p->vertex_attributes) / sizeof(SWvtx_attribute));
constSWintbinded_arr_buf=ctx->binded_buffers[0];
SWvtx_attribute*v=&p->vertex_attributes[index];
v->size=size;
v->stride=stride ? stride : size;
if (binded_arr_buf!=-1) {
SWbuffer*b=&ctx->buffers[binded_arr_buf];
v->data= (char*)b->data+ (uintptr_t)pointer;
} else {
v->data= (void*)pointer;
}
}
voidswProgDisableVtxAttrib(SWprogram*p, constSWuintindex) {
SWvtx_attribute*v=&p->vertex_attributes[index];
v->data=NULL;
}
voidswProgRegUniform(SWprogram*p, constSWintindex, constSWenumtype) {
SWuniform*u=&p->uniforms[index];
constSWintsize=_swTypeSize(type);
u->type=type;
assert(!u->data);
u->data=&p->uniform_buf[p->unifrom_buf_size];
p->unifrom_buf_size+=size;
}
voidswProgRegUniformv(SWprogram*p, constSWintindex, constSWenumtype,
constSWintnum) {
SWuniform*u=&p->uniforms[index];
constSWintsize=_swTypeSize(type);
u->type=type;
assert(!u->data);
u->data=&p->uniform_buf[p->unifrom_buf_size];
p->unifrom_buf_size+=size*num;
}
voidswProgSetProgramUniform(SWprogram*p, constSWintindex, constSWenumtype,
constvoid*data) {
SWuniform*u=&p->uniforms[index];
constSWintsize=_swTypeSize(type);
assert(u->type==type);
memcpy(u->data, data, (size_t)size);
}
voidswProgSetProgramUniformv(SWprogram*p, constSWintindex, constSWenumtype,
constSWintnum, constvoid*data) {
SWuniform*u=&p->uniforms[index];
constSWintsize=_swTypeSize(type);
assert(u->type==type);
memcpy(u->data, data, (size_t)size*num);
}
voidswProgDrawLinesArray(SWprogram*p, SWcontext*ctx, constSWuintfirst,
constSWuintcount) {
SWframebuffer*f=&ctx->framebuffers[ctx->cur_framebuffer];
SWuintj;
constSWintb_depth_test=f->zbuf&& (ctx->render_flags&DEPTH_TEST_ENABLED);
constSWintb_depth_write=f->zbuf&& (ctx->render_flags&DEPTH_WRITE_ENABLED);
constSWintinterp_mode=
(ctx->render_flags&PERSPECTIVE_CORRECTION_ENABLED)
? ((ctx->render_flags&FAST_PERSPECTIVE_CORRECTION) ? 2 : 1)
: 0;
constSWintnum_corr_attrs= (interp_mode==0) ? 3 : p->v_out_size;
SWfloatvs_out[2][SW_MAX_VTX_ATTRIBS];
for (j=first; j<first+count; j+=2) {
/* transform vertices */
(*p->v_proc)(p->vertex_attributes, j, p->uniforms, vs_out[0]);
(*p->v_proc)(p->vertex_attributes, j+1, p->uniforms, vs_out[1]);
if (!_swClipAndTransformToNDC_Line(vs_out, vs_out, p->v_out_size,
num_corr_attrs)) {
continue;
}
_swProcessLine(p, f, vs_out[0], vs_out[1], b_depth_test, b_depth_write);
}
}
voidswProgDrawLineStripArray(SWprogram*p, SWcontext*ctx, constSWuintfirst,
constSWuintcount) {
SWframebuffer*f=&ctx->framebuffers[ctx->cur_framebuffer];
SWuintj;
SWintb_depth_test=f->zbuf&& (ctx->render_flags&DEPTH_TEST_ENABLED);
SWintb_depth_write=f->zbuf&& (ctx->render_flags&DEPTH_WRITE_ENABLED);
constSWintinterp_mode=
(ctx->render_flags&PERSPECTIVE_CORRECTION_ENABLED)
? ((ctx->render_flags&FAST_PERSPECTIVE_CORRECTION) ? 2 : 1)
: 0;
constSWintnum_corr_attrs= (interp_mode==0) ? 3 : p->v_out_size;
SWfloatvs_out[2][SW_MAX_VTX_ATTRIBS];
SWint_1=1, _2=0;
(*p->v_proc)(p->vertex_attributes, first, p->uniforms, vs_out[0]);
for (j=first; j<first+count-1; j++) {
sw_swap(_1, _2, SWint);
/* transform vertices */
(*p->v_proc)(p->vertex_attributes, j+1, p->uniforms, vs_out[_2]);
SWfloatvs_out2[2][SW_MAX_VTX_ATTRIBS];
if (!_swClipAndTransformToNDC_Line(vs_out, vs_out2, p->v_out_size,
num_corr_attrs))
continue;
_swProcessLine(p, f, vs_out2[_1], vs_out2[_2], b_depth_test, b_depth_write);
}
}
voidswProgDrawLinesIndexed(SWprogram*p, SWcontext*ctx, constSWuintcount,
constSWenumindex_type, constvoid*indices) {
SWframebuffer*f=&ctx->framebuffers[ctx->cur_framebuffer];
SWuintj;
SWintb_depth_test=f->zbuf&& (ctx->render_flags&DEPTH_TEST_ENABLED);
SWintb_depth_write=f->zbuf&& (ctx->render_flags&DEPTH_WRITE_ENABLED);
constSWintinterp_mode=
(ctx->render_flags&PERSPECTIVE_CORRECTION_ENABLED)
? ((ctx->render_flags&FAST_PERSPECTIVE_CORRECTION) ? 2 : 1)
: 0;
constSWintnum_corr_attrs= (interp_mode==0) ? 3 : p->v_out_size;
SWuintindex1=0, index2=0;
SWfloatvs_out[2][SW_MAX_VTX_ATTRIBS];
if (!count)
return;
if (ctx->binded_buffers[1] !=-1) {
SWbuffer*b=&ctx->buffers[ctx->binded_buffers[1]];
indices= (char*)b->data+ (uintptr_t)indices;
}
for (j=0; j<count; j+=2) {
if (index_type==SW_UNSIGNED_BYTE) {
index1= (SWuint) * ((SWubyte*)indices+j);
index2= (SWuint) * ((SWubyte*)indices+j+1);
} elseif (index_type==SW_UNSIGNED_SHORT) {
index1= (SWuint) * ((SWushort*)indices+j);
index2= (SWuint) * ((SWushort*)indices+j+1);
} elseif (index_type==SW_UNSIGNED_INT) {
index1=*((SWuint*)indices+j);
index2=*((SWuint*)indices+j+1);
}
(*p->v_proc)(p->vertex_attributes, index1, p->uniforms, vs_out[0]);
(*p->v_proc)(p->vertex_attributes, index2, p->uniforms, vs_out[1]);
if (!_swClipAndTransformToNDC_Line(vs_out, vs_out, p->v_out_size,
num_corr_attrs)) {
continue;
}
_swProcessLine(p, f, vs_out[0], vs_out[1], b_depth_test, b_depth_write);
}
}
voidswProgDrawLineStripIndexed(SWprogram*p, SWcontext*ctx, constSWuintcount,
constSWenumindex_type, constvoid*indices) {
SWframebuffer*f=&ctx->framebuffers[ctx->cur_framebuffer];
constSWintb_depth_test=f->zbuf&& (ctx->render_flags&DEPTH_TEST_ENABLED);
constSWintb_depth_write=f->zbuf&& (ctx->render_flags&DEPTH_WRITE_ENABLED);
constSWintinterp_mode=
(ctx->render_flags&PERSPECTIVE_CORRECTION_ENABLED)
? ((ctx->render_flags&FAST_PERSPECTIVE_CORRECTION) ? 2 : 1)
: 0;
constSWintnum_corr_attrs= (interp_mode==0) ? 3 : p->v_out_size;
SWfloatvs_out[2][SW_MAX_VTX_ATTRIBS];
SWint_1=1, _2=0;
SWuintj, index1, index2;
if (!count) {
return;
}
if (ctx->binded_buffers[1] !=-1) {
SWbuffer*b=&ctx->buffers[ctx->binded_buffers[1]];
indices= (char*)b->data+ (uintptr_t)indices;
}
index1=_swGetIndex(index_type, 0, indices);
(*p->v_proc)(p->vertex_attributes, index1, p->uniforms, vs_out[0]);
for (j=0; j<count-1; j++) {
sw_swap(_1, _2, SWint);
index2=_swGetIndex(index_type, j+1, indices);
/* transform vertices */
(*p->v_proc)(p->vertex_attributes, index2, p->uniforms, vs_out[_2]);
SWfloatvs_out2[2][SW_MAX_VTX_ATTRIBS];
if (!_swClipAndTransformToNDC_Line(vs_out, vs_out2, p->v_out_size,
num_corr_attrs))
continue;
_swProcessLine(p, f, vs_out2[_1], vs_out2[_2], b_depth_test, b_depth_write);
}
}
voidswProgDrawCurvesArray(SWprogram*p, SWcontext*ctx, constSWuintfirst,
constSWuintcount) {
SWframebuffer*f=&ctx->framebuffers[ctx->cur_framebuffer];
SWuintj;
constSWintb_depth_test=f->zbuf&& (ctx->render_flags&DEPTH_TEST_ENABLED);
constSWintb_depth_write=f->zbuf&& (ctx->render_flags&DEPTH_WRITE_ENABLED);
constSWfloatcurve_tolerance=_swCurveTolerance(ctx, f);
SWfloatvs_out[4][SW_MAX_VTX_ATTRIBS];
for (j=first; j<first+count; j+=4) {
/* transform vertices */
(*p->v_proc)(p->vertex_attributes, j, p->uniforms, vs_out[0]);
(*p->v_proc)(p->vertex_attributes, j+1, p->uniforms, vs_out[1]);
(*p->v_proc)(p->vertex_attributes, j+2, p->uniforms, vs_out[2]);
(*p->v_proc)(p->vertex_attributes, j+3, p->uniforms, vs_out[3]);
_swProcessCurve(p, f, vs_out, 0, 1, 2, 3, b_depth_test, b_depth_write,
curve_tolerance);
}
}
voidswProgDrawCurveStripArray(SWprogram*p, SWcontext*ctx, constSWuintfirst,
constSWuintcount) {
SWframebuffer*f=&ctx->framebuffers[ctx->cur_framebuffer];
SWuintj;
constSWintb_depth_test=f->zbuf&& (ctx->render_flags&DEPTH_TEST_ENABLED);
constSWintb_depth_write=f->zbuf&& (ctx->render_flags&DEPTH_WRITE_ENABLED);
constSWfloatcurve_tolerance=_swCurveTolerance(ctx, f);
SWfloatvs_out[4][SW_MAX_VTX_ATTRIBS];
SWint_0=3, _3=0;
(*p->v_proc)(p->vertex_attributes, first, p->uniforms, vs_out[0]);
for (j=first; j<first+count-3; j+=3) {
sw_swap(_0, _3, SWint);
/* transform vertices */
(*p->v_proc)(p->vertex_attributes, j+1, p->uniforms, vs_out[1]);
(*p->v_proc)(p->vertex_attributes, j+2, p->uniforms, vs_out[2]);
(*p->v_proc)(p->vertex_attributes, j+3, p->uniforms, vs_out[_3]);
_swProcessCurve(p, f, vs_out, _0, 1, 2, _3, b_depth_test, b_depth_write,
curve_tolerance);
}
}
voidswProgDrawCurvesIndexed(SWprogram*p, SWcontext*ctx, constSWuintcount,
constSWenumindex_type, constvoid*indices) {
SWframebuffer*f=&ctx->framebuffers[ctx->cur_framebuffer];
SWuintj;
constSWintb_depth_test=f->zbuf&& (ctx->render_flags&DEPTH_TEST_ENABLED);
constSWintb_depth_write=f->zbuf&& (ctx->render_flags&DEPTH_WRITE_ENABLED);
constSWfloatcurve_tolerance=_swCurveTolerance(ctx, f);
SWuintindex1=0, index2=0, index3=0, index4=0;
SWfloatvs_out[4][SW_MAX_VTX_ATTRIBS];
if (!count)
return;
if (ctx->binded_buffers[1] !=-1) {
SWbuffer*b=&ctx->buffers[ctx->binded_buffers[1]];
indices= (char*)b->data+ (uintptr_t)indices;
}
for (j=0; j<count; j+=4) {
if (index_type==SW_UNSIGNED_BYTE) {
index1= (SWuint) * ((SWubyte*)indices+j);
index2= (SWuint) * ((SWubyte*)indices+j+1);
index3= (SWuint) * ((SWubyte*)indices+j+2);
index4= (SWuint) * ((SWubyte*)indices+j+3);
} elseif (index_type==SW_UNSIGNED_SHORT) {
index1= (SWuint) * ((SWushort*)indices+j);
index2= (SWuint) * ((SWushort*)indices+j+1);
index3= (SWuint) * ((SWushort*)indices+j+2);
index4= (SWuint) * ((SWushort*)indices+j+3);
} elseif (index_type==SW_UNSIGNED_INT) {
index1=*((SWuint*)indices+j);
index2=*((SWuint*)indices+j+1);
index3=*((SWuint*)indices+j+2);
index4=*((SWuint*)indices+j+3);
}
(*p->v_proc)(p->vertex_attributes, index1, p->uniforms, vs_out[0]);
(*p->v_proc)(p->vertex_attributes, index2, p->uniforms, vs_out[1]);
(*p->v_proc)(p->vertex_attributes, index3, p->uniforms, vs_out[2]);
(*p->v_proc)(p->vertex_attributes, index4, p->uniforms, vs_out[3]);
_swProcessCurve(p, f, vs_out, 0, 1, 2, 3, b_depth_test, b_depth_write,
curve_tolerance);
}
}
voidswProgDrawCurveStripIndexed(SWprogram*p, SWcontext*ctx, constSWuintcount,
constSWenumindex_type, constvoid*indices) {
SWframebuffer*f=&ctx->framebuffers[ctx->cur_framebuffer];
constSWintb_depth_test=f->zbuf&& (ctx->render_flags&DEPTH_TEST_ENABLED);
constSWintb_depth_write=f->zbuf&& (ctx->render_flags&DEPTH_WRITE_ENABLED);
constSWfloatcurve_tolerance=_swCurveTolerance(ctx, f);
SWfloatvs_out[4][SW_MAX_VTX_ATTRIBS];
SWint_0=3, _3=0;
SWuintj, index1, index2, index3, index4;
if (!count) {
return;
}
if (ctx->binded_buffers[1] !=-1) {
SWbuffer*b=&ctx->buffers[ctx->binded_buffers[1]];
indices= (char*)b->data+ (uintptr_t)indices;
}
index1=_swGetIndex(index_type, 0, indices);
(*p->v_proc)(p->vertex_attributes, index1, p->uniforms, vs_out[0]);
for (j=0; j<count-1; j+=3) {
sw_swap(_0, _3, SWint);
index2=_swGetIndex(index_type, j+1, indices);
index3=_swGetIndex(index_type, j+2, indices);
index4=_swGetIndex(index_type, j+3, indices);
/* transform vertices */
(*p->v_proc)(p->vertex_attributes, index2, p->uniforms, vs_out[1]);
(*p->v_proc)(p->vertex_attributes, index3, p->uniforms, vs_out[2]);
(*p->v_proc)(p->vertex_attributes, index4, p->uniforms, vs_out[_3]);
_swProcessCurve(p, f, vs_out, _0, 1, 2, _3, b_depth_test, b_depth_write,
curve_tolerance);
}
}
voidswProgDrawTrianglesArray(SWprogram*p, SWcontext*ctx, constSWuintfirst,
constSWuintcount) {
SWframebuffer*f=&ctx->framebuffers[ctx->cur_framebuffer];
constSWintb_depth_test=f->zbuf&& (ctx->render_flags&DEPTH_TEST_ENABLED);
constSWintb_depth_write=f->zbuf&& (ctx->render_flags&DEPTH_WRITE_ENABLED);
constSWintb_blend= (ctx->render_flags&BLEND_ENABLED);
constSWintinterp_mode=
(ctx->render_flags&PERSPECTIVE_CORRECTION_ENABLED)
? ((ctx->render_flags&FAST_PERSPECTIVE_CORRECTION) ? 2 : 1)
: 0;
constSWintnum_corr_attrs= (interp_mode==0) ? 3 : p->v_out_size;
SWinti;
SWuintj;
SWfloatvs_out[16][SW_MAX_VTX_ATTRIBS];
if (!count) {
return;
}
for (j=first; j<first+count; j+=3) {
/* transform vertices */
(*p->v_proc)(p->vertex_attributes, j, p->uniforms, vs_out[0]);
(*p->v_proc)(p->vertex_attributes, j+1, p->uniforms, vs_out[1]);
(*p->v_proc)(p->vertex_attributes, j+2, p->uniforms, vs_out[2]);
/* clipping may result in creating additional vertices */
SWintout_verts[16];
constSWintnum_verts=_swClipAndTransformToNDC_Tri(
vs_out, vs_out, 0, 1, 2, out_verts, p->v_out_size, num_corr_attrs);
for (i=1; i<num_verts-1; i++) {
if (interp_mode==0) {
_swProcessTriangle_nocorrect(p, f, vs_out, out_verts[0], out_verts[i],
out_verts[i+1], b_depth_test,
b_depth_write, b_blend);
} elseif (interp_mode==1) {
_swProcessTriangle_correct(p, f, vs_out, out_verts[0], out_verts[i],
out_verts[i+1], b_depth_test, b_depth_write,
b_blend);
} else {
_swProcessTriangle_fast(p, f, vs_out, out_verts[0], out_verts[i],
out_verts[i+1], b_depth_test, b_depth_write,
b_blend);
}
}
}
}
voidswProgDrawTriangleStripArray(SWprogram*p, SWcontext*ctx, constSWuintfirst,
constSWuintcount) {
SWframebuffer*f=&ctx->framebuffers[ctx->cur_framebuffer];
constSWintb_depth_test=f->zbuf&& (ctx->render_flags&DEPTH_TEST_ENABLED);
constSWintb_depth_write=f->zbuf&& (ctx->render_flags&DEPTH_WRITE_ENABLED);
constSWintb_blend= (ctx->render_flags&BLEND_ENABLED);
constSWintinterp_mode=
(ctx->render_flags&PERSPECTIVE_CORRECTION_ENABLED)
? ((ctx->render_flags&FAST_PERSPECTIVE_CORRECTION) ? 2 : 1)
: 0;
constSWintnum_corr_attrs= (interp_mode==0) ? 3 : p->v_out_size;
SWfloatvs_out[3][SW_MAX_VTX_ATTRIBS];
SWint_0=0, _1=1, _2=2, is_odd=1;
(*p->v_proc)(p->vertex_attributes, first, p->uniforms, vs_out[0]);
(*p->v_proc)(p->vertex_attributes, first+1, p->uniforms, vs_out[1]);
if (!count) {
return;
}
for (SWuintj=first; j<first+count-2; j++) {
is_odd= !is_odd;
(*p->v_proc)(p->vertex_attributes, j+2, p->uniforms, vs_out[_2]);
/* clipping may result in creating additional vertices */
SWfloatvs_out2[16][SW_MAX_VTX_ATTRIBS];
SWintout_verts[16];
constSWintnum_verts=_swClipAndTransformToNDC_Tri(
vs_out, vs_out2, _0, _1, _2, out_verts, p->v_out_size, num_corr_attrs);
for (SWinti=1; i<num_verts-1; i++) {
if (interp_mode==0) {
_swProcessTriangle_nocorrect(p, f, vs_out2, out_verts[0], out_verts[i],
out_verts[i+1], b_depth_test,
b_depth_write, b_blend);
} elseif (interp_mode==1) {
_swProcessTriangle_correct(p, f, vs_out2, out_verts[0], out_verts[i],
out_verts[i+1], b_depth_test, b_depth_write,
b_blend);
} else {
_swProcessTriangle_fast(p, f, vs_out2, out_verts[0], out_verts[i],
out_verts[i+1], b_depth_test, b_depth_write,
b_blend);
}
}
if (is_odd) {
sw_swap(_0, _1, SWint);
}
sw_rotate_lefti(_0, _1, _2);
if (!is_odd) {
sw_swap(_0, _1, SWint);
}
}
}
voidswProgDrawTrianglesIndexed(SWprogram*p, SWcontext*ctx, constSWuintcount,
constSWenumindex_type, constvoid*indices) {
SWframebuffer*f=&ctx->framebuffers[ctx->cur_framebuffer];
constSWintb_depth_test=f->zbuf&& (ctx->render_flags&DEPTH_TEST_ENABLED);
constSWintb_depth_write=f->zbuf&& (ctx->render_flags&DEPTH_WRITE_ENABLED);
constSWintb_blend= (ctx->render_flags&BLEND_ENABLED);
constSWintinterp_mode=
(ctx->render_flags&PERSPECTIVE_CORRECTION_ENABLED)
? ((ctx->render_flags&FAST_PERSPECTIVE_CORRECTION) ? 2 : 1)
: 0;
constSWintnum_corr_attrs= (interp_mode==0) ? 3 : p->v_out_size;
SWuintindex1=0, index2=0, index3=0;
SWfloatvs_out[16][SW_MAX_VTX_ATTRIBS];
if (!count) {
return;
}
if (ctx->binded_buffers[1] !=-1) {
SWbuffer*b=&ctx->buffers[ctx->binded_buffers[1]];
indices= (char*)b->data+ (uintptr_t)indices;
}
for (SWuintj=0; j<count; j+=3) {
if (index_type==SW_UNSIGNED_BYTE) {
index1= (SWuint) * ((SWubyte*)indices+j);
index2= (SWuint) * ((SWubyte*)indices+j+1);
index3= (SWuint) * ((SWubyte*)indices+j+2);
} elseif (index_type==SW_UNSIGNED_SHORT) {
index1= (SWuint) * ((SWushort*)indices+j);
index2= (SWuint) * ((SWushort*)indices+j+1);
index3= (SWuint) * ((SWushort*)indices+j+2);
} elseif (index_type==SW_UNSIGNED_INT) {
index1=*((SWuint*)indices+j);
index2=*((SWuint*)indices+j+1);
index3=*((SWuint*)indices+j+2);
}
/* transform vertices */
(*p->v_proc)(p->vertex_attributes, index1, p->uniforms, vs_out[0]);
(*p->v_proc)(p->vertex_attributes, index2, p->uniforms, vs_out[1]);
(*p->v_proc)(p->vertex_attributes, index3, p->uniforms, vs_out[2]);
/* clipping may result in creating additional vertices */
SWintout_verts[16];
constSWintnum_verts=_swClipAndTransformToNDC_Tri(
vs_out, vs_out, 0, 1, 2, out_verts, p->v_out_size, num_corr_attrs);
for (SWinti=1; i<num_verts-1; i++) {
if (interp_mode==0) {
_swProcessTriangle_nocorrect(p, f, vs_out, out_verts[0], out_verts[i],
out_verts[i+1], b_depth_test,
b_depth_write, b_blend);
} elseif (interp_mode==1) {
_swProcessTriangle_correct(p, f, vs_out, out_verts[0], out_verts[i],
out_verts[i+1], b_depth_test, b_depth_write,
b_blend);
} else {
_swProcessTriangle_fast(p, f, vs_out, out_verts[0], out_verts[i],
out_verts[i+1], b_depth_test, b_depth_write,
b_blend);
}
}
}
}
voidswProgDrawTriangleStripIndexed(SWprogram*p, SWcontext*ctx, constSWuintcount,
constSWenumindex_type, constvoid*indices) {
SWframebuffer*f=&ctx->framebuffers[ctx->cur_framebuffer];
constSWintb_depth_test=f->zbuf&& (ctx->render_flags&DEPTH_TEST_ENABLED);
constSWintb_depth_write=f->zbuf&& (ctx->render_flags&DEPTH_WRITE_ENABLED);
constSWintb_blend= (ctx->render_flags&BLEND_ENABLED);
constSWintinterp_mode=
(ctx->render_flags&PERSPECTIVE_CORRECTION_ENABLED)
? ((ctx->render_flags&FAST_PERSPECTIVE_CORRECTION) ? 2 : 1)
: 0;
constSWintnum_corr_attrs= (interp_mode==0) ? 3 : p->v_out_size;
SWuintindex1=0, index2=0;
if (!count)
return;
if (ctx->binded_buffers[1] !=-1) {
SWbuffer*b=&ctx->buffers[ctx->binded_buffers[1]];
indices= (char*)b->data+ (uintptr_t)indices;
}
if (index_type==SW_UNSIGNED_BYTE) {
index1= (SWuint) * ((SWubyte*)indices+0);
index2= (SWuint) * ((SWubyte*)indices+0+1);
} elseif (index_type==SW_UNSIGNED_SHORT) {
index1= (SWuint) * ((SWushort*)indices+0);
index2= (SWuint) * ((SWushort*)indices+0+1);
} elseif (index_type==SW_UNSIGNED_INT) {
index1=*((SWuint*)indices+0);
index2=*((SWuint*)indices+0+1);
}
SWfloatvs_out[3][SW_MAX_VTX_ATTRIBS];
SWint_0=0, _1=1, _2=2, is_odd=1;
(*p->v_proc)(p->vertex_attributes, index1, p->uniforms, vs_out[0]);
(*p->v_proc)(p->vertex_attributes, index2, p->uniforms, vs_out[1]);
for (SWuintj=0; j<count-2; j++) {
is_odd= !is_odd;
SWuintindex3=_swGetIndex(index_type, j+2, indices);
(*p->v_proc)(p->vertex_attributes, index3, p->uniforms, vs_out[_2]);
/* clipping may result in creating additional vertices */
SWfloatvs_out2[16][SW_MAX_VTX_ATTRIBS];
SWintout_verts[16];
constSWintnum_verts=_swClipAndTransformToNDC_Tri(
vs_out, vs_out2, _0, _1, _2, out_verts, p->v_out_size, num_corr_attrs);
for (SWinti=1; i<num_verts-1; i++) {
if (interp_mode==0) {
_swProcessTriangle_nocorrect(p, f, vs_out2, out_verts[0], out_verts[i],
out_verts[i+1], b_depth_test,
b_depth_write, b_blend);
} elseif (interp_mode==1) {
_swProcessTriangle_correct(p, f, vs_out2, out_verts[0], out_verts[i],
out_verts[i+1], b_depth_test, b_depth_write,
b_blend);
} else {
_swProcessTriangle_fast(p, f, vs_out2, out_verts[0], out_verts[i],
out_verts[i+1], b_depth_test, b_depth_write,
b_blend);
}
}
if (is_odd) {
sw_swap(_0, _1, SWint);
}
sw_rotate_lefti(_0, _1, _2);
if (!is_odd) {
sw_swap(_0, _1, SWint);
}
}
}