diff options
author | Brian <brian.paul@tungstengraphics.com> | 2007-06-29 21:12:46 -0600 |
---|---|---|
committer | Brian <brian.paul@tungstengraphics.com> | 2007-06-29 21:12:46 -0600 |
commit | fc5bf536440efeb9766cc1fd6e69642bc27afbd8 (patch) | |
tree | 4cd4bbeb4861155ebb3cded70b253aeedda14009 /src/mesa | |
parent | 66d0784f13cb3af68341f7349c5798ba1f955fc3 (diff) |
overhaul point rasterization, no longer use s_pointtemp.h
Diffstat (limited to 'src/mesa')
-rw-r--r-- | src/mesa/swrast/s_points.c | 657 |
1 files changed, 465 insertions, 192 deletions
diff --git a/src/mesa/swrast/s_points.c b/src/mesa/swrast/s_points.c index b91ce73d7a..ade1eab891 100644 --- a/src/mesa/swrast/s_points.c +++ b/src/mesa/swrast/s_points.c @@ -34,134 +34,493 @@ #include "s_span.h" -#define RGBA 0x1 -#define INDEX 0x2 -#define SMOOTH 0x4 -#define ATTRIBS 0x8 -#define SPECULAR 0x10 -#define LARGE 0x20 -#define ATTENUATE 0x40 -#define SPRITE 0x80 - - -/* - * CI points with size == 1.0 - */ -#define FLAGS (INDEX) -#define NAME size1_ci_point -#include "s_pointtemp.h" - - -/* - * General CI points. +/** + * Used to cull points with invalid coords */ -#define FLAGS (INDEX | LARGE) -#define NAME general_ci_point -#include "s_pointtemp.h" +#define CULL_INVALID(V) \ + do { \ + float tmp = (V)->attrib[FRAG_ATTRIB_WPOS][0] \ + + (V)->attrib[FRAG_ATTRIB_WPOS][1]; \ + if (IS_INF_OR_NAN(tmp)) \ + return; \ + } while(0) -/* - * Antialiased CI points. +/** + * Draw a point sprite */ -#define FLAGS (INDEX | SMOOTH) -#define NAME antialiased_ci_point -#include "s_pointtemp.h" +static void +sprite_point(GLcontext *ctx, const SWvertex *vert) +{ + SWcontext *swrast = SWRAST_CONTEXT(ctx); + SWspan span; + GLfloat size; + GLuint tCoords[MAX_TEXTURE_COORD_UNITS]; + GLuint numTcoords = 0; + GLfloat t0, dtdy; + + CULL_INVALID(vert); + + /* z coord */ + if (ctx->DrawBuffer->Visual.depthBits <= 16) + span.z = FloatToFixed(vert->attrib[FRAG_ATTRIB_WPOS][2] + 0.5F); + else + span.z = (GLuint) (vert->attrib[FRAG_ATTRIB_WPOS][2] + 0.5F); + span.zStep = 0; + + /* compute size */ + if (ctx->Point._Attenuated || ctx->VertexProgram.PointSizeEnabled) { + /* use vertex's point size */ + /* first, clamp attenuated size to the user-specifed range */ + size = CLAMP(vert->pointSize, ctx->Point.MinSize, ctx->Point.MaxSize); + } + else { + /* use constant point size */ + size = ctx->Point._Size; /* already clamped to user range */ + } + /* clamp to non-AA implementation limits */ + size = CLAMP(size, ctx->Const.MinPointSize, ctx->Const.MaxPointSize); + + /* span init */ + INIT_SPAN(span, GL_POINT, 0, 0, 0); + span.interpMask = SPAN_Z | SPAN_RGBA; + + span.red = ChanToFixed(vert->color[0]); + span.green = ChanToFixed(vert->color[1]); + span.blue = ChanToFixed(vert->color[2]); + span.alpha = ChanToFixed(vert->color[3]); + span.redStep = 0; + span.greenStep = 0; + span.blueStep = 0; + span.alphaStep = 0; + + /* need these for fragment programs */ + span.attrStart[FRAG_ATTRIB_WPOS][3] = 1.0F; + span.attrStepX[FRAG_ATTRIB_WPOS][3] = 0.0F; + span.attrStepY[FRAG_ATTRIB_WPOS][3] = 0.0F; + + ATTRIB_LOOP_BEGIN + if (attr >= FRAG_ATTRIB_TEX0 && attr < FRAG_ATTRIB_VAR0) { + const GLuint u = attr - FRAG_ATTRIB_TEX0; + /* a texcoord */ + if (ctx->Point.CoordReplace[u]) { + GLfloat s, r, dsdx; + + s = 0.0; + dsdx = 1.0 / size; + + if (ctx->Point.SpriteOrigin == GL_LOWER_LEFT) { + t0 = 0.0; + dtdy = 1.0 / size; + } + else { + /* GL_UPPER_LEFT */ + t0 = 1.0; + dtdy = -1.0 / size; + } + tCoords[numTcoords++] = attr; + + if (ctx->Point.SpriteRMode == GL_ZERO) + r = 0.0F; + else if (ctx->Point.SpriteRMode == GL_S) + r = vert->attrib[attr][0]; + else /* GL_R */ + r = vert->attrib[attr][2]; + + span.attrStart[attr][0] = s; + span.attrStart[attr][1] = 0.0; /* overwritten below */ + span.attrStart[attr][2] = r; + span.attrStart[attr][3] = 1.0; + + span.attrStepX[attr][0] = dsdx; + span.attrStepX[attr][1] = 0.0; + span.attrStepX[attr][2] = 0.0; + span.attrStepX[attr][3] = 0.0; + + span.attrStepY[attr][0] = 0.0; + span.attrStepY[attr][1] = dtdy; + span.attrStepY[attr][2] = 0.0; + span.attrStepY[attr][3] = 0.0; + + continue; + } + } + /* use vertex's texcoord/attrib */ + COPY_4V(span.attrStart[attr], vert->attrib[attr]); + ASSIGN_4V(span.attrStepX[attr], 0, 0, 0, 0); + ASSIGN_4V(span.attrStepY[attr], 0, 0, 0, 0); + ATTRIB_LOOP_END + + /* compute pos, bounds and render */ + { + const GLfloat x = vert->attrib[FRAG_ATTRIB_WPOS][0]; + const GLfloat y = vert->attrib[FRAG_ATTRIB_WPOS][1]; + GLint iSize = (GLint) (size + 0.5F); + GLint xmin, xmax, ymin, ymax, iy; + GLint iRadius; + GLfloat tcoord = t0; + + iSize = MAX2(1, iSize); + iRadius = iSize / 2; + + if (iSize & 1) { + /* odd size */ + xmin = (GLint) (x - iRadius); + xmax = (GLint) (x + iRadius); + ymin = (GLint) (y - iRadius); + ymax = (GLint) (y + iRadius); + } + else { + /* even size */ + xmin = (GLint) x - iRadius + 1; + xmax = xmin + iSize - 1; + ymin = (GLint) y - iRadius + 1; + ymax = ymin + iSize - 1; + } + /* render spans */ + for (iy = ymin; iy <= ymax; iy++) { + GLuint i; + /* setup texcoord T for this row */ + for (i = 0; i < numTcoords; i++) { + span.attrStart[tCoords[i]][1] = tcoord; + } -/* - * Distance attenuated, general CI points. - */ -#define FLAGS (INDEX | ATTENUATE) -#define NAME atten_general_ci_point -#include "s_pointtemp.h" + /* these might get changed by span clipping */ + span.x = xmin; + span.y = iy; + span.end = xmax - xmin + 1; + _swrast_write_rgba_span(ctx, &span); -/* - * RGBA points with size == 1.0 - */ -#define FLAGS (RGBA) -#define NAME size1_rgba_point -#include "s_pointtemp.h" + tcoord += dtdy; + } + } +} -/* - * General RGBA points. +/** + * Draw smooth/antialiased point. RGB or CI mode. */ -#define FLAGS (RGBA | LARGE) -#define NAME general_rgba_point -#include "s_pointtemp.h" - +static void +smooth_point(GLcontext *ctx, const SWvertex *vert) +{ + SWcontext *swrast = SWRAST_CONTEXT(ctx); + const GLboolean ciMode = !ctx->Visual.rgbMode; + SWspan span; + GLfloat size, alphaAtten; + + CULL_INVALID(vert); + + /* z coord */ + if (ctx->DrawBuffer->Visual.depthBits <= 16) + span.z = FloatToFixed(vert->attrib[FRAG_ATTRIB_WPOS][2] + 0.5F); + else + span.z = (GLuint) (vert->attrib[FRAG_ATTRIB_WPOS][2] + 0.5F); + span.zStep = 0; + + /* compute size */ + if (ctx->Point._Attenuated || ctx->VertexProgram.PointSizeEnabled) { + /* use vertex's point size */ + /* first, clamp attenuated size to the user-specifed range */ + size = CLAMP(vert->pointSize, ctx->Point.MinSize, ctx->Point.MaxSize); + } + else { + /* use constant point size */ + size = ctx->Point._Size; /* this is already clamped */ + } + /* clamp to AA implementation limits */ + size = CLAMP(size, ctx->Const.MinPointSizeAA, ctx->Const.MaxPointSizeAA); -/* - * Antialiased RGBA points. - */ -#define FLAGS (RGBA | SMOOTH) -#define NAME antialiased_rgba_point -#include "s_pointtemp.h" + /* alpha attenuation / fade factor */ + if (ctx->Multisample.Enabled) { + if (vert->pointSize >= ctx->Point.Threshold) { + alphaAtten = 1.0F; + } + else { + GLfloat dsize = vert->pointSize / ctx->Point.Threshold; + alphaAtten = dsize * dsize; + } + } + else { + alphaAtten = 1.0; + } + (void) alphaAtten; /* not used */ + + /* span init */ + INIT_SPAN(span, GL_POINT, 0, 0, 0); + span.interpMask = SPAN_Z | SPAN_RGBA; + span.arrayMask = SPAN_COVERAGE | SPAN_MASK; + + span.red = ChanToFixed(vert->color[0]); + span.green = ChanToFixed(vert->color[1]); + span.blue = ChanToFixed(vert->color[2]); + span.alpha = ChanToFixed(vert->color[3]); + span.redStep = 0; + span.greenStep = 0; + span.blueStep = 0; + span.alphaStep = 0; + + /* need these for fragment programs */ + span.attrStart[FRAG_ATTRIB_WPOS][3] = 1.0F; + span.attrStepX[FRAG_ATTRIB_WPOS][3] = 0.0F; + span.attrStepY[FRAG_ATTRIB_WPOS][3] = 0.0F; + + ATTRIB_LOOP_BEGIN + COPY_4V(span.attrStart[attr], vert->attrib[attr]); + ASSIGN_4V(span.attrStepX[attr], 0, 0, 0, 0); + ASSIGN_4V(span.attrStepY[attr], 0, 0, 0, 0); + ATTRIB_LOOP_END + + /* compute pos, bounds and render */ + { + const GLfloat x = vert->attrib[FRAG_ATTRIB_WPOS][0]; + const GLfloat y = vert->attrib[FRAG_ATTRIB_WPOS][1]; + const GLfloat radius = 0.5F * size; + const GLfloat rmin = radius - 0.7071F; /* 0.7071 = sqrt(2)/2 */ + const GLfloat rmax = radius + 0.7071F; + const GLfloat rmin2 = MAX2(0.0F, rmin * rmin); + const GLfloat rmax2 = rmax * rmax; + const GLfloat cscale = 1.0F / (rmax2 - rmin2); + const GLint xmin = (GLint) (x - radius); + const GLint xmax = (GLint) (x + radius); + const GLint ymin = (GLint) (y - radius); + const GLint ymax = (GLint) (y + radius); + GLint ix, iy; + + for (iy = ymin; iy <= ymax; iy++) { + + /* these might get changed by span clipping */ + span.x = xmin; + span.y = iy; + span.end = xmax - xmin + 1; + + /* compute coverage for each pixel in span */ + for (ix = xmin; ix <= xmax; ix++) { + const GLfloat dx = ix - x + 0.5F; + const GLfloat dy = iy - y + 0.5F; + const GLfloat dist2 = dx * dx + dy * dy; + GLfloat coverage; + + if (dist2 < rmax2) { + if (dist2 >= rmin2) { + /* compute partial coverage */ + coverage = 1.0F - (dist2 - rmin2) * cscale; + if (ciMode) { + /* coverage in [0,15] */ + coverage *= 15.0; + } + } + else { + /* full coverage */ + coverage = 1.0F; + } + span.array->mask[ix - xmin] = 1; + } + else { + /* zero coverage - fragment outside the radius */ + coverage = 0.0; + span.array->mask[ix - xmin] = 0; + } + span.array->coverage[ix - xmin] = coverage; + } + /* render span */ + _swrast_write_rgba_span(ctx, &span); -/* - * Textured RGBA points. - */ -#define FLAGS (RGBA | LARGE | ATTRIBS | SPECULAR) -#define NAME textured_rgba_point -#include "s_pointtemp.h" + } + } +} -/* - * Antialiased points with texture mapping. +/** + * Draw large (size >= 1) non-AA point. RGB or CI mode. */ -#define FLAGS (RGBA | SMOOTH | ATTRIBS | SPECULAR) -#define NAME antialiased_tex_rgba_point -#include "s_pointtemp.h" +static void +large_point(GLcontext *ctx, const SWvertex *vert) +{ + SWcontext *swrast = SWRAST_CONTEXT(ctx); + const GLboolean ciMode = !ctx->Visual.rgbMode; + SWspan span; + GLfloat size; + + CULL_INVALID(vert); + + /* z coord */ + if (ctx->DrawBuffer->Visual.depthBits <= 16) + span.z = FloatToFixed(vert->attrib[FRAG_ATTRIB_WPOS][2] + 0.5F); + else + span.z = (GLuint) (vert->attrib[FRAG_ATTRIB_WPOS][2] + 0.5F); + span.zStep = 0; + + /* compute size */ + if (ctx->Point._Attenuated || ctx->VertexProgram.PointSizeEnabled) { + /* use vertex's point size */ + /* first, clamp attenuated size to the user-specifed range */ + size = CLAMP(vert->pointSize, ctx->Point.MinSize, ctx->Point.MaxSize); + } + else { + /* use constant point size */ + size = ctx->Point._Size; /* already clamped to user range */ + } + /* clamp to non-AA implementation limits */ + size = CLAMP(size, ctx->Const.MinPointSize, ctx->Const.MaxPointSize); + /* span init */ + INIT_SPAN(span, GL_POINT, 0, 0, 0); + span.arrayMask = SPAN_XY; -/* - * Distance attenuated, general RGBA points. - */ -#define FLAGS (RGBA | ATTENUATE) -#define NAME atten_general_rgba_point -#include "s_pointtemp.h" + if (ciMode) { + span.interpMask = SPAN_Z | SPAN_INDEX; + span.index = FloatToFixed(vert->attrib[FRAG_ATTRIB_CI][0]); + span.indexStep = 0; + } + else { + span.interpMask = SPAN_Z | SPAN_RGBA; + span.red = ChanToFixed(vert->color[0]); + span.green = ChanToFixed(vert->color[1]); + span.blue = ChanToFixed(vert->color[2]); + span.alpha = ChanToFixed(vert->color[3]); + span.redStep = 0; + span.greenStep = 0; + span.blueStep = 0; + span.alphaStep = 0; + } + /* need these for fragment programs */ + span.attrStart[FRAG_ATTRIB_WPOS][3] = 1.0F; + span.attrStepX[FRAG_ATTRIB_WPOS][3] = 0.0F; + span.attrStepY[FRAG_ATTRIB_WPOS][3] = 0.0F; + + ATTRIB_LOOP_BEGIN + COPY_4V(span.attrStart[attr], vert->attrib[attr]); + ASSIGN_4V(span.attrStepX[attr], 0, 0, 0, 0); + ASSIGN_4V(span.attrStepY[attr], 0, 0, 0, 0); + ATTRIB_LOOP_END + + /* compute pos, bounds and render */ + { + const GLfloat x = vert->attrib[FRAG_ATTRIB_WPOS][0]; + const GLfloat y = vert->attrib[FRAG_ATTRIB_WPOS][1]; + GLint iSize = (GLint) (size + 0.5F); + GLint xmin, xmax, ymin, ymax, ix, iy; + GLint iRadius; + + iSize = MAX2(1, iSize); + iRadius = iSize / 2; + + if (iSize & 1) { + /* odd size */ + xmin = (GLint) (x - iRadius); + xmax = (GLint) (x + iRadius); + ymin = (GLint) (y - iRadius); + ymax = (GLint) (y + iRadius); + } + else { + /* even size */ + xmin = (GLint) x - iRadius + 1; + xmax = xmin + iSize - 1; + ymin = (GLint) y - iRadius + 1; + ymax = ymin + iSize - 1; + } -/* - * Distance attenuated, textured RGBA points. - */ -#define FLAGS (RGBA | ATTENUATE | ATTRIBS | SPECULAR) -#define NAME atten_textured_rgba_point -#include "s_pointtemp.h" + /* generate fragments */ + span.end = 0; + for (iy = ymin; iy <= ymax; iy++) { + for (ix = xmin; ix <= xmax; ix++) { + span.array->x[span.end] = ix; + span.array->y[span.end] = iy; + span.end++; + } + } + assert(span.end <= MAX_WIDTH); + _swrast_write_rgba_span(ctx, &span); + } +} -/* - * Distance attenuated, antialiased points with or without texture mapping. +/** + * Draw size=1, single-pixel point */ -#define FLAGS (RGBA | ATTENUATE | ATTRIBS | SMOOTH) -#define NAME atten_antialiased_rgba_point -#include "s_pointtemp.h" +static void +pixel_point(GLcontext *ctx, const SWvertex *vert) +{ + SWcontext *swrast = SWRAST_CONTEXT(ctx); + const GLboolean ciMode = !ctx->Visual.rgbMode; + /* + * Note that unlike the other functions, we put single-pixel points + * into a special span array in order to render as many points as + * possible with a single _swrast_write_rgba_span() call. + */ + SWspan *span = &(swrast->PointSpan); + GLuint count; + + CULL_INVALID(vert); + + /* Span init */ + span->interpMask = 0; + span->arrayMask = SPAN_XY | SPAN_Z; + if (ciMode) + span->arrayMask |= SPAN_INDEX; + else + span->arrayMask |= SPAN_RGBA; + /*span->arrayMask |= SPAN_LAMBDA;*/ + span->arrayAttribs = swrast->_ActiveAttribMask; /* we'll produce these vals */ + + /* need these for fragment programs */ + span->attrStart[FRAG_ATTRIB_WPOS][3] = 1.0F; + span->attrStepX[FRAG_ATTRIB_WPOS][3] = 0.0F; + span->attrStepY[FRAG_ATTRIB_WPOS][3] = 0.0F; + + /* check if we need to flush */ + if (span->end >= MAX_WIDTH || + (swrast->_RasterMask & (BLEND_BIT | LOGIC_OP_BIT | MASKING_BIT))) { + if (ciMode) + _swrast_write_index_span(ctx, span); + else + _swrast_write_rgba_span(ctx, span); + span->end = 0; + } + count = span->end; -/* - * Sprite (textured point) - */ -#define FLAGS (RGBA | SPRITE | SPECULAR) -#define NAME sprite_point -#include "s_pointtemp.h" + /* fragment attributes */ + if (ciMode) { + span->array->index[count] = (GLuint) vert->attrib[FRAG_ATTRIB_CI][0]; + } + else { + span->array->rgba[count][RCOMP] = vert->color[0]; + span->array->rgba[count][GCOMP] = vert->color[1]; + span->array->rgba[count][BCOMP] = vert->color[2]; + span->array->rgba[count][ACOMP] = vert->color[3]; + } + ATTRIB_LOOP_BEGIN + COPY_4V(span->array->attribs[attr][count], vert->attrib[attr]); + ATTRIB_LOOP_END + /* fragment position */ + span->array->x[count] = (GLint) vert->attrib[FRAG_ATTRIB_WPOS][0]; + span->array->y[count] = (GLint) vert->attrib[FRAG_ATTRIB_WPOS][1]; + span->array->z[count] = (GLint) (vert->attrib[FRAG_ATTRIB_WPOS][2] + 0.5F); -#define FLAGS (RGBA | SPRITE | SPECULAR | ATTENUATE) -#define NAME atten_sprite_point -#include "s_pointtemp.h" + span->end = count + 1; + ASSERT(span->end <= MAX_WIDTH); +} +/** + * Add specular color to primary color, draw point, restore original + * primary color. + */ void _swrast_add_spec_terms_point(GLcontext *ctx, const SWvertex *v0) { - SWvertex *ncv0 = (SWvertex *) v0; + SWvertex *ncv0 = (SWvertex *) v0; /* cast away const */ GLfloat rSum, gSum, bSum; GLchan cSave[4]; /* save */ - COPY_CHAN4( cSave, ncv0->color ); + COPY_CHAN4(cSave, ncv0->color); /* sum */ rSum = CHAN_TO_FLOAT(ncv0->color[0]) + ncv0->attrib[FRAG_ATTRIB_COL1][0]; gSum = CHAN_TO_FLOAT(ncv0->color[1]) + ncv0->attrib[FRAG_ATTRIB_COL1][1]; @@ -176,121 +535,35 @@ _swrast_add_spec_terms_point(GLcontext *ctx, const SWvertex *v0) } - -/* record the current point function name */ -#ifdef DEBUG - -static const char *pntFuncName = NULL; - -#define USE(pntFunc) \ -do { \ - pntFuncName = #pntFunc; \ - /*printf("%s\n", pntFuncName);*/ \ - swrast->Point = pntFunc; \ -} while (0) - -#else - -#define USE(pntFunc) swrast->Point = pntFunc - -#endif - - -/* - * Examine the current context to determine which point drawing function - * should be used. +/** + * Examine current state to determine which point drawing function to use. */ void -_swrast_choose_point( GLcontext *ctx ) +_swrast_choose_point(GLcontext *ctx) { SWcontext *swrast = SWRAST_CONTEXT(ctx); - GLboolean rgbMode = ctx->Visual.rgbMode; - GLboolean specular = (ctx->Fog.ColorSumEnabled || - (ctx->Light.Enabled && - ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR)); - GLboolean attribs = (ctx->FragmentProgram._Current || - ctx->Texture._EnabledCoordUnits || - swrast->_FogEnabled || - specular); - /* - * XXX this is a mess that should be cleaned up someday - */ - - if (ctx->RenderMode==GL_RENDER) { + if (ctx->RenderMode == GL_RENDER) { if (ctx->Point.PointSprite) { - /* GL_ARB_point_sprite / GL_NV_point_sprite */ - /* XXX this might not be good enough */ - if (ctx->Point._Attenuated) - USE(atten_sprite_point); - else - USE(sprite_point); - } - else if (ctx->Point.SmoothFlag && !attribs) { - /* Smooth points */ - if (rgbMode) { - if (ctx->Point._Attenuated || ctx->VertexProgram.PointSizeEnabled) { - USE(atten_antialiased_rgba_point); - } - else if (ctx->Texture._EnabledCoordUnits) { - USE(antialiased_tex_rgba_point); - } - else { - USE(antialiased_rgba_point); - } - } - else { - USE(antialiased_ci_point); - } + swrast->Point = sprite_point; } - else if (ctx->Point._Attenuated || ctx->VertexProgram.PointSizeEnabled) { - if (rgbMode) { - if (attribs) { - if (ctx->Point.SmoothFlag) { - USE(atten_antialiased_rgba_point); - } - else { - USE(atten_textured_rgba_point); - } - } - else { - USE(atten_general_rgba_point); - } - } - else { - /* ci, atten */ - USE(atten_general_ci_point); - } + else if (ctx->Point.SmoothFlag) { + swrast->Point = smooth_point; } - else if (attribs && rgbMode) { - /* textured, fogged */ - USE(textured_rgba_point); - } - else if (ctx->Point._Size != 1.0) { - /* large points */ - if (rgbMode) { - USE(general_rgba_point); - } - else { - USE(general_ci_point); - } + else if (ctx->Point._Size > 1.0 || + ctx->Point._Attenuated || + ctx->VertexProgram.PointSizeEnabled) { + swrast->Point = large_point; } else { - /* single pixel points */ - if (rgbMode) { - assert((swrast->_ActiveAttribMask & FRAG_BIT_COL1) == 0); - USE(size1_rgba_point); - } - else { - USE(size1_ci_point); - } + swrast->Point = pixel_point; } } - else if (ctx->RenderMode==GL_FEEDBACK) { - USE(_swrast_feedback_point); + else if (ctx->RenderMode == GL_FEEDBACK) { + swrast->Point = _swrast_feedback_point; } else { /* GL_SELECT mode */ - USE(_swrast_select_point); + swrast->Point = _swrast_select_point; } } |