-/* $Id: s_pointtemp.h,v 1.13 2002/03/16 18:02:08 brianp Exp $ */
-
/*
* Mesa 3-D graphics library
- * Version: 4.1
+ * Version: 6.5.3
*
- * Copyright (C) 1999-2002 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2007 Brian Paul 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"),
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
+/*
+ * Regarding GL_NV_point_sprite:
+ *
+ * Portions of this software may use or implement intellectual
+ * property owned and licensed by NVIDIA Corporation. NVIDIA disclaims
+ * any and all warranties with respect to such intellectual property,
+ * including any use thereof or modifications thereto.
+ */
+
/*
* Point rendering template code.
*
* RGBA = do rgba instead of color index
* SMOOTH = do antialiasing
- * TEXTURE = do texture coords
+ * ATTRIBS = general attributes (texcoords, etc)
* SPECULAR = do separate specular color
* LARGE = do points with diameter > 1 pixel
* ATTENUATE = compute point size attenuation
- * SPRITE = GL_MESA_sprite_point
+ * SPRITE = GL_ARB_point_sprite / GL_NV_point_sprite
*
* Notes: LARGE and ATTENUATE are exclusive of each other.
- * TEXTURE requires RGBA
- * SPECULAR requires TEXTURE
+ * ATTRIBS requires RGBA
*/
*/
-
static void
NAME ( GLcontext *ctx, const SWvertex *vert )
{
-#if FLAGS & TEXTURE
- GLuint u;
-#endif
-#if FLAGS & (ATTENUATE | LARGE | SMOOTH)
+#if FLAGS & (ATTENUATE | LARGE | SMOOTH | SPRITE)
GLfloat size;
#endif
-#if FLAGS & ATTENUATE
+#if FLAGS & RGBA
+#if (FLAGS & ATTENUATE) && (FLAGS & SMOOTH)
GLfloat alphaAtten;
#endif
-#if (FLAGS & RGBA) && (FLAGS & SMOOTH)
const GLchan red = vert->color[0];
const GLchan green = vert->color[1];
const GLchan blue = vert->color[2];
const GLchan alpha = vert->color[3];
#endif
-
- struct sw_span span;
+#if FLAGS & SPECULAR
+ const GLchan specRed = vert->specular[0];
+ const GLchan specGreen = vert->specular[1];
+ const GLchan specBlue = vert->specular[2];
+#endif
+#if FLAGS & INDEX
+ const GLuint colorIndex = (GLuint) vert->index; /* XXX round? */
+#endif
+#if FLAGS & ATTRIBS
+ GLfloat attrib[FRAG_ATTRIB_MAX][4]; /* texture & varying */
+#endif
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ SWspan *span = &(swrast->PointSpan);
/* Cull primitives with malformed coordinates.
*/
return;
}
- INIT_SPAN(span);
-
- span.arrayMask |= (SPAN_XY | SPAN_Z);
- span.interpMask |= SPAN_FOG;
- span.fog = vert->fog;
- span.fogStep = 0.0;
-
-#if (FLAGS & RGBA)
-#if (FLAGS & SMOOTH)
- span.arrayMask |= SPAN_RGBA;
-#else
- span.interpMask |= 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 = span.greenStep = span.blueStep = span.alphaStep = 0;
-#endif /*SMOOTH*/
-#endif /*RGBA*/
+ /*
+ * Span init
+ */
+ span->interpMask = SPAN_FOG;
+ span->arrayMask = SPAN_XY | SPAN_Z;
+ span->attrStart[FRAG_ATTRIB_FOGC][0] = vert->attrib[FRAG_ATTRIB_FOGC][0];
+ span->attrStepX[FRAG_ATTRIB_FOGC][0] = 0.0;
+ span->attrStepY[FRAG_ATTRIB_FOGC][0] = 0.0;
+#if FLAGS & RGBA
+ span->arrayMask |= SPAN_RGBA;
+#endif
#if FLAGS & SPECULAR
- span.interpMask |= SPAN_SPEC;
- span.specRed = ChanToFixed(vert->specular[0]);
- span.specGreen = ChanToFixed(vert->specular[1]);
- span.specBlue = ChanToFixed(vert->specular[2]);
- span.specRedStep = span.specGreenStep = span.specBlueStep = 0;
+ span->arrayMask |= SPAN_SPEC;
#endif
#if FLAGS & INDEX
- span.interpMask |= SPAN_INDEX;
- span.index = IntToFixed(vert->index);
- span.indexStep = 0;
+ span->arrayMask |= SPAN_INDEX;
#endif
-#if FLAGS & TEXTURE
- span.interpMask |= SPAN_TEXTURE;
- for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
- if (ctx->Texture.Unit[u]._ReallyEnabled) {
- const GLfloat q = vert->texcoord[u][3];
- const GLfloat invQ = (q == 0.0 || q == 1.0) ? 1.0 : (1.0 / q);
- span.tex[u][0] = vert->texcoord[u][0] * invQ;
- span.tex[u][1] = vert->texcoord[u][1] * invQ;
- span.tex[u][2] = vert->texcoord[u][2] * invQ;
- span.tex[u][3] = q;
- span.texStepX[u][0] = span.texStepY[u][0] = 0.0;
- span.texStepX[u][1] = span.texStepY[u][1] = 0.0;
- span.texStepX[u][2] = span.texStepY[u][2] = 0.0;
- span.texStepX[u][3] = span.texStepY[u][3] = 0.0;
- }
+#if FLAGS & ATTRIBS
+ span->arrayMask |= (SPAN_TEXTURE | SPAN_LAMBDA);
+ if (ctx->FragmentProgram._Active) {
+ /* Don't divide texture s,t,r by q (use TXP to do that) */
+ ATTRIB_LOOP_BEGIN
+ COPY_4V(attrib[attr], vert->attrib[attr]);
+ ATTRIB_LOOP_END
+ }
+ else {
+ /* Divide texture s,t,r by q here */
+ ATTRIB_LOOP_BEGIN
+ const GLfloat q = vert->attrib[attr][3];
+ const GLfloat invQ = (q == 0.0F || q == 1.0F) ? 1.0F : (1.0F / q);
+ attrib[attr][0] = vert->attrib[attr][0] * invQ;
+ attrib[attr][1] = vert->attrib[attr][1] * invQ;
+ attrib[attr][2] = vert->attrib[attr][2] * invQ;
+ attrib[attr][3] = q;
+ ATTRIB_LOOP_END
}
+ /* 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;
#endif
#if FLAGS & SMOOTH
- span.arrayMask |= SPAN_COVERAGE;
+ span->arrayMask |= SPAN_COVERAGE;
+#endif
+#if FLAGS & SPRITE
+ span->arrayMask |= (SPAN_TEXTURE | SPAN_LAMBDA);
#endif
+ /* Compute point size if not known to be one */
#if FLAGS & ATTENUATE
- if (vert->pointSize >= ctx->Point.Threshold) {
- size = MIN2(vert->pointSize, ctx->Point.MaxSize);
- alphaAtten = 1.0F;
+ /* first, clamp attenuated size to the user-specifed range */
+ size = CLAMP(vert->pointSize, ctx->Point.MinSize, ctx->Point.MaxSize);
+#if (FLAGS & RGBA) && (FLAGS & SMOOTH)
+ /* only if multisampling, compute the 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 {
- GLfloat dsize = vert->pointSize / ctx->Point.Threshold;
- size = MAX2(ctx->Point.Threshold, ctx->Point.MinSize);
- alphaAtten = dsize * dsize;
+ alphaAtten = 1.0;
}
-#elif FLAGS & (LARGE | SMOOTH)
- size = ctx->Point._Size;
#endif
-
-#if FLAGS & SPRITE
- {
- SWcontext *swctx = SWRAST_CONTEXT(ctx);
- const GLfloat radius = 0.5F * vert->pointSize; /* XXX threshold, alpha */
- SWvertex v0, v1, v2, v3;
- GLuint unit;
-
-#if (FLAGS & RGBA) && (FLAGS & SMOOTH)
- (void) red;
- (void) green;
- (void) blue;
- (void) alpha;
+#elif FLAGS & (LARGE | SMOOTH | SPRITE)
+ /* constant, non-attenuated size */
+ size = ctx->Point._Size; /* this is already clamped */
#endif
- /* lower left corner */
- v0 = *vert;
- v0.win[0] -= radius;
- v0.win[1] -= radius;
-
- /* lower right corner */
- v1 = *vert;
- v1.win[0] += radius;
- v1.win[1] -= radius;
-
- /* upper right corner */
- v2 = *vert;
- v2.win[0] += radius;
- v2.win[1] += radius;
-
- /* upper left corner */
- v3 = *vert;
- v3.win[0] -= radius;
- v3.win[1] += radius;
-
- for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) {
- if (ctx->Texture.Unit[unit]._ReallyEnabled) {
- v0.texcoord[unit][0] = 0.0;
- v0.texcoord[unit][1] = 0.0;
- v1.texcoord[unit][0] = 1.0;
- v1.texcoord[unit][1] = 0.0;
- v2.texcoord[unit][0] = 1.0;
- v2.texcoord[unit][1] = 1.0;
- v3.texcoord[unit][0] = 0.0;
- v3.texcoord[unit][1] = 1.0;
- }
- }
-
- /* XXX if radius < threshold, attenuate alpha? */
- /* XXX need to implement clipping!!! */
+#if FLAGS & (ATTENUATE | LARGE | SMOOTH | SPRITE)
+ /***
+ *** Multi-pixel points
+ ***/
- /* render */
- swctx->Triangle(ctx, &v0, &v1, &v2);
- swctx->Triangle(ctx, &v0, &v2, &v3);
+ /* do final clamping now */
+ if (ctx->Point.SmoothFlag) {
+ size = CLAMP(size, ctx->Const.MinPointSizeAA, ctx->Const.MaxPointSizeAA);
+ }
+ else {
+ size = CLAMP(size, ctx->Const.MinPointSize, ctx->Const.MaxPointSize);
}
-#elif FLAGS & (LARGE | ATTENUATE | SMOOTH)
-
- {
+ {{
GLint x, y;
const GLfloat radius = 0.5F * size;
- const GLint z = (GLint) (vert->win[2]);
- GLuint count = 0;
+ const GLuint z = (GLuint) (vert->win[2] + 0.5F);
+ GLuint count;
#if FLAGS & SMOOTH
const GLfloat rmin = radius - 0.7071F; /* 0.7071 = sqrt(2)/2 */
const GLfloat rmax = radius + 0.7071F;
}
#endif /*SMOOTH*/
+ /* check if we need to flush */
+ if (span->end + (xmax-xmin+1) * (ymax-ymin+1) >= MAX_WIDTH ||
+ (swrast->_RasterMask & (BLEND_BIT | LOGIC_OP_BIT | MASKING_BIT))) {
+ if (span->end > 0) {
+#if FLAGS & RGBA
+ _swrast_write_rgba_span(ctx, span);
+#else
+ _swrast_write_index_span(ctx, span);
+#endif
+ span->end = 0;
+ }
+ }
+
+ /*
+ * OK, generate fragments
+ */
+ count = span->end;
(void) radius;
for (y = ymin; y <= ymax; y++) {
+ /* check if we need to flush */
+ if (count + (xmax-xmin+1) >= MAX_WIDTH) {
+ span->end = count;
+#if FLAGS & RGBA
+ _swrast_write_rgba_span(ctx, span);
+#else
+ _swrast_write_index_span(ctx, span);
+#endif
+ count = span->end = 0;
+ }
for (x = xmin; x <= xmax; x++) {
+#if FLAGS & SPRITE
+ GLuint u;
+#endif
+
+#if FLAGS & RGBA
+ span->array->rgba[count][RCOMP] = red;
+ span->array->rgba[count][GCOMP] = green;
+ span->array->rgba[count][BCOMP] = blue;
+ span->array->rgba[count][ACOMP] = alpha;
+#endif
+#if FLAGS & SPECULAR
+ span->array->spec[count][RCOMP] = specRed;
+ span->array->spec[count][GCOMP] = specGreen;
+ span->array->spec[count][BCOMP] = specBlue;
+#endif
+#if FLAGS & INDEX
+ span->array->index[count] = colorIndex;
+#endif
+#if FLAGS & ATTRIBS
+ ATTRIB_LOOP_BEGIN
+ COPY_4V(span->array->attribs[attr][count], attrib[attr]);
+ if (attr < FRAG_ATTRIB_VAR0 && attr >= FRAG_ATTRIB_TEX0) {
+ const GLuint u = attr - FRAG_ATTRIB_TEX0;
+ span->array->lambda[u][count] = 0.0;
+ }
+ ATTRIB_LOOP_END
+#endif
+
#if FLAGS & SMOOTH
/* compute coverage */
- const GLfloat dx = x - vert->win[0] + 0.5F;
- const GLfloat dy = y - vert->win[1] + 0.5F;
- const GLfloat dist2 = dx * dx + dy * dy;
- if (dist2 < rmax2) {
- if (dist2 >= rmin2) {
- /* compute partial coverage */
- span.coverage[count] = 1.0F - (dist2 - rmin2) * cscale;
+ {
+ const GLfloat dx = x - vert->win[0] + 0.5F;
+ const GLfloat dy = y - vert->win[1] + 0.5F;
+ const GLfloat dist2 = dx * dx + dy * dy;
+ if (dist2 < rmax2) {
+ if (dist2 >= rmin2) {
+ /* compute partial coverage */
+ span->array->coverage[count] = 1.0F - (dist2 - rmin2) * cscale;
#if FLAGS & INDEX
- span.coverage[count] *= 15.0; /* coverage in [0,15] */
+ /* coverage in [0,15] */
+ span->array->coverage[count] *= 15.0;
#endif
+ }
+ else {
+ /* full coverage */
+ span->array->coverage[count] = 1.0F;
+ }
+
+ span->array->x[count] = x;
+ span->array->y[count] = y;
+ span->array->z[count] = z;
+
+#if (FLAGS & ATTENUATE) && (FLAGS & RGBA)
+ span->array->rgba[count][ACOMP] = (GLchan) (alpha * alphaAtten);
+#elif FLAGS & RGBA
+ span->array->rgba[count][ACOMP] = alpha;
+#endif /*ATTENUATE*/
+ count++;
+ } /*if*/
+ }
+
+#else /*SMOOTH*/
+
+ /* not smooth (square points) */
+ span->array->x[count] = x;
+ span->array->y[count] = y;
+ span->array->z[count] = z;
+
+#if FLAGS & SPRITE
+ for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
+ GLuint attr = FRAG_ATTRIB_TEX0 + u;
+ if (ctx->Texture.Unit[u]._ReallyEnabled) {
+ if (ctx->Point.CoordReplace[u]) {
+ GLfloat s = 0.5F + (x + 0.5F - vert->win[0]) / size;
+ GLfloat t, r;
+ if (ctx->Point.SpriteOrigin == GL_LOWER_LEFT)
+ t = 0.5F + (y + 0.5F - vert->win[1]) / size;
+ else /* GL_UPPER_LEFT */
+ t = 0.5F - (y + 0.5F - vert->win[1]) / size;
+ 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->array->attribs[attr][count][0] = s;
+ span->array->attribs[attr][count][1] = t;
+ span->array->attribs[attr][count][2] = r;
+ span->array->attribs[attr][count][3] = 1.0F;
+ span->array->lambda[u][count] = 0.0; /* XXX fix? */
+ }
+ else {
+ COPY_4V(span->array->attribs[attr][count],
+ vert->attrib[attr]);
+ }
}
- else {
- /* full coverage */
- span.coverage[count] = 1.0F;
- }
+ }
+#endif /*SPRITE*/
- span.xArray[count] = x;
- span.yArray[count] = y;
- span.zArray[count] = z;
+ count++; /* square point */
-#if FLAGS & RGBA
- span.color.rgba[count][RCOMP] = red;
- span.color.rgba[count][GCOMP] = green;
- span.color.rgba[count][BCOMP] = blue;
-#if FLAGS & ATTENUATE
- span.color.rgba[count][ACOMP] = (GLchan) (alpha * alphaAtten);
-#else
- span.color.rgba[count][ACOMP] = alpha;
-#endif /*ATTENUATE*/
-#endif /*RGBA*/
- count++;
- } /*if*/
-#else /*SMOOTH*/
- /* not smooth (square points */
- span.xArray[count] = x;
- span.yArray[count] = y;
- span.zArray[count] = z;
- count++;
#endif /*SMOOTH*/
+
} /*for x*/
} /*for y*/
- span.end = count;
- }
+ span->end = count;
+ }}
-#else /* LARGE || ATTENUATE || SMOOTH*/
+#else /* LARGE | ATTENUATE | SMOOTH | SPRITE */
- {
- /* size == 1 */
- span.xArray[0] = (GLint) vert->win[0];
- span.yArray[0] = (GLint) vert->win[1];
- span.zArray[0] = (GLint) vert->win[2];
- span.end = 1;
- }
+ /***
+ *** Single-pixel points
+ ***/
+ {{
+ GLuint count;
-#endif /* LARGE || ATTENUATE || SMOOTH */
+ /* check if we need to flush */
+ if (span->end >= MAX_WIDTH ||
+ (swrast->_RasterMask & (BLEND_BIT | LOGIC_OP_BIT | MASKING_BIT))) {
+#if FLAGS & RGBA
+ _swrast_write_rgba_span(ctx, span);
+#else
+ _swrast_write_index_span(ctx, span);
+#endif
+ span->end = 0;
+ }
- ASSERT(span.end > 0);
+ count = span->end;
-#if FLAGS & TEXTURE
- if (ctx->Texture._ReallyEnabled)
- _mesa_write_texture_span(ctx, &span, GL_POINT);
- else
- _mesa_write_rgba_span(ctx, &span, GL_POINT);
-#elif FLAGS & RGBA
- _mesa_write_rgba_span(ctx, &span, GL_POINT);
-#else
- _mesa_write_index_span(ctx, &span, GL_POINT);
+#if FLAGS & RGBA
+ span->array->rgba[count][RCOMP] = red;
+ span->array->rgba[count][GCOMP] = green;
+ span->array->rgba[count][BCOMP] = blue;
+ span->array->rgba[count][ACOMP] = alpha;
+#endif
+#if FLAGS & SPECULAR
+ span->array->spec[count][RCOMP] = specRed;
+ span->array->spec[count][GCOMP] = specGreen;
+ span->array->spec[count][BCOMP] = specBlue;
+#endif
+#if FLAGS & INDEX
+ span->array->index[count] = colorIndex;
+#endif
+#if FLAGS & ATTRIBS
+ ATTRIB_LOOP_BEGIN
+ COPY_4V(span->array->attribs[attr][count], attribs[attr]);
+ ATTRIB_LOOP_END
#endif
+
+ span->array->x[count] = (GLint) vert->win[0];
+ span->array->y[count] = (GLint) vert->win[1];
+ span->array->z[count] = (GLint) (vert->win[2] + 0.5F);
+ span->end = count + 1;
+ }}
+
+#endif /* LARGE || ATTENUATE || SMOOTH */
+
+ ASSERT(span->end <= MAX_WIDTH);
}
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