static void
feedback_tri( struct draw_stage *stage, struct prim_header *prim )
{
struct feedback_stage *fs = feedback_stage(stage);
struct draw_context *draw = stage->draw;
_mesa_feedback_token(fs->ctx, (GLfloat) GL_POLYGON_TOKEN);
_mesa_feedback_token(fs->ctx, (GLfloat) 3); /* three vertices */
feedback_vertex(fs->ctx, draw, prim->v[0]);
feedback_vertex(fs->ctx, draw, prim->v[1]);
feedback_vertex(fs->ctx, draw, prim->v[2]);
}
/*
* Put triangle in feedback buffer.
*/
void gl_feedback_triangle( GLcontext *ctx,
GLuint v0, GLuint v1, GLuint v2, GLuint pv )
{
if (gl_cull_triangle( ctx, v0, v1, v2, 0 )) {
FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_POLYGON_TOKEN );
FEEDBACK_TOKEN( ctx, (GLfloat) 3 ); /* three vertices */
feedback_vertex( ctx, v0, pv );
feedback_vertex( ctx, v1, pv );
feedback_vertex( ctx, v2, pv );
}
}
void gl_feedback_line( GLcontext *ctx, GLuint v1, GLuint v2, GLuint pv )
{
GLenum token = GL_LINE_TOKEN;
if (ctx->StippleCounter==0)
token = GL_LINE_RESET_TOKEN;
FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) token );
feedback_vertex( ctx, v1, pv );
feedback_vertex( ctx, v2, pv );
ctx->StippleCounter++;
}
static void
feedback_line( struct draw_stage *stage, struct prim_header *prim )
{
struct feedback_stage *fs = feedback_stage(stage);
struct draw_context *draw = stage->draw;
if (fs->reset_stipple_counter) {
_mesa_feedback_token(fs->ctx, (GLfloat) GL_LINE_RESET_TOKEN);
fs->reset_stipple_counter = GL_FALSE;
}
else {
_mesa_feedback_token(fs->ctx, (GLfloat) GL_LINE_TOKEN);
}
feedback_vertex(fs->ctx, draw, prim->v[0]);
feedback_vertex(fs->ctx, draw, prim->v[1]);
}
static void
feedback_point( struct draw_stage *stage, struct prim_header *prim )
{
struct feedback_stage *fs = feedback_stage(stage);
struct draw_context *draw = stage->draw;
_mesa_feedback_token(fs->ctx, (GLfloat) GL_POINT_TOKEN);
feedback_vertex(fs->ctx, draw, prim->v[0]);
}
void _swrast_feedback_line( GLcontext *ctx, const SWvertex *v0, const SWvertex *v1 )
{
GLenum token = GL_LINE_TOKEN;
SWcontext *swrast = SWRAST_CONTEXT(ctx);
if (swrast->StippleCounter==0)
token = GL_LINE_RESET_TOKEN;
FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) token );
if (ctx->Light.ShadeModel == GL_SMOOTH) {
feedback_vertex( ctx, v0, v0 );
feedback_vertex( ctx, v1, v1 );
} else {
feedback_vertex( ctx, v0, v1 );
feedback_vertex( ctx, v1, v1 );
}
swrast->StippleCounter++;
}
void gl_feedback_points( GLcontext *ctx, GLuint first, GLuint last )
{
const struct vertex_buffer *VB = ctx->VB;
GLuint i;
for (i=first;i<last;i++) {
if (VB->ClipMask[i]==0) {
FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_POINT_TOKEN );
feedback_vertex( ctx, i, i );
}
}
}
/*
* Put triangle in feedback buffer.
*/
void
_swrast_feedback_triangle(struct gl_context *ctx, const SWvertex *v0,
const SWvertex *v1, const SWvertex *v2)
{
if (!_swrast_culltriangle(ctx, v0, v1, v2)) {
_mesa_feedback_token(ctx, (GLfloat) (GLint) GL_POLYGON_TOKEN);
_mesa_feedback_token(ctx, (GLfloat) 3); /* three vertices */
if (ctx->Light.ShadeModel == GL_SMOOTH) {
feedback_vertex(ctx, v0, v0);
feedback_vertex(ctx, v1, v1);
feedback_vertex(ctx, v2, v2);
}
else {
feedback_vertex(ctx, v0, v2);
feedback_vertex(ctx, v1, v2);
feedback_vertex(ctx, v2, v2);
}
}
}
/*
* Put triangle in feedback buffer.
*/
void
_swrast_feedback_triangle(GLcontext *ctx, const SWvertex *v0,
const SWvertex *v1, const SWvertex *v2)
{
if (_swrast_culltriangle(ctx, v0, v1, v2)) {
FEEDBACK_TOKEN(ctx, (GLfloat) (GLint) GL_POLYGON_TOKEN);
FEEDBACK_TOKEN(ctx, (GLfloat) 3); /* three vertices */
if (ctx->Light.ShadeModel == GL_SMOOTH) {
feedback_vertex(ctx, v0, v0);
feedback_vertex(ctx, v1, v1);
feedback_vertex(ctx, v2, v2);
}
else {
feedback_vertex(ctx, v0, v2);
feedback_vertex(ctx, v1, v2);
feedback_vertex(ctx, v2, v2);
}
}
}
void
_swrast_feedback_point(struct gl_context *ctx, const SWvertex *v)
{
_mesa_feedback_token(ctx, (GLfloat) (GLint) GL_POINT_TOKEN);
feedback_vertex(ctx, v, v);
}
void gl_feedback_block(block_t *block) {
if (block->len == 0) {
return;
}
int size = feedback_sizeof(state.feedback.type);
GLfloat *v, *c, *t;
int v1, v2, v3;
int first = _index(block, 0);
for (int j = 0; j < block->len; j++) {
int i = _index(block, j);
v2 = v1;
v3 = v2;
v1 = i;
// TODO: overflow'd feedback returns -1 in glRenderMode
#define polygon(n) { if (feedback_overflow(size * n)) return; feedback_polygon(n); state.feedback.values -= 1; }
switch (block->mode) {
case GL_LINES:
if (i % 2 == 1) {
polygon(2);
feedback_vertex(block, v2);
feedback_vertex(block, v1);
}
break;
case GL_LINE_LOOP:
// catch the loop segment
if (i == block->len - 1) {
polygon(2);
feedback_vertex(block, v1);
feedback_vertex(block, first);
}
case GL_LINE_STRIP:
if (i > 0) {
polygon(2);
feedback_vertex(block, v2);
feedback_vertex(block, v1);
}
break;
case GL_TRIANGLES:
if (i % 3 == 2) {
polygon(3);
feedback_vertex(block, v3);
feedback_vertex(block, v2);
feedback_vertex(block, v1);
}
case GL_TRIANGLE_FAN:
if (i > 1) {
polygon(3);
feedback_vertex(block, v2);
feedback_vertex(block, v1);
feedback_vertex(block, first);
}
break;
case GL_TRIANGLE_STRIP:
if (i > 1) {
polygon(3);
feedback_vertex(block, v3);
feedback_vertex(block, v2);
feedback_vertex(block, v1);
}
break;
case GL_POINTS:
polygon(1);
feedback_vertex(block, v1);
break;
default:
printf("warning: unsupported GL_SELECT mode: %s\n", gl_str(block->mode));
return;
}
}
}
void
_swrast_feedback_point(GLcontext *ctx, const SWvertex *v)
{
FEEDBACK_TOKEN(ctx, (GLfloat) (GLint) GL_POINT_TOKEN);
feedback_vertex(ctx, v, v);
}