*/
-#include "glheader.h"
-#include "colormac.h"
-#include "context.h"
-#include "macros.h"
-#include "texstate.h"
+#include "main/glheader.h"
+#include "main/colormac.h"
+#include "main/context.h"
+#include "main/macros.h"
+#include "main/texstate.h"
#include "s_context.h"
#include "s_feedback.h"
#include "s_points.h"
} while(0)
+
+/**
+ * Get/compute the point size.
+ * The size may come from a vertex shader, or computed with attentuation
+ * or just the glPointSize value.
+ * Must also clamp to user-defined range and implmentation limits.
+ */
+static INLINE GLfloat
+get_size(const GLcontext *ctx, const SWvertex *vert, GLboolean smoothed)
+{
+ GLfloat size;
+
+ if (ctx->Point._Attenuated || ctx->VertexProgram.PointSizeEnabled) {
+ /* use vertex's point size */
+ size = vert->pointSize;
+ }
+ else {
+ /* use constant point size */
+ size = ctx->Point.Size;
+ }
+ /* always clamp to user-specified limits */
+ size = CLAMP(size, ctx->Point.MinSize, ctx->Point.MaxSize);
+ /* clamp to implementation limits */
+ if (smoothed)
+ size = CLAMP(size, ctx->Const.MinPointSizeAA, ctx->Const.MaxPointSizeAA);
+ else
+ size = CLAMP(size, ctx->Const.MinPointSize, ctx->Const.MaxPointSize);
+
+ return size;
+}
+
+
/**
* Draw a point sprite
*/
SWcontext *swrast = SWRAST_CONTEXT(ctx);
SWspan span;
GLfloat size;
- GLuint tCoords[MAX_TEXTURE_COORD_UNITS];
+ GLuint tCoords[MAX_TEXTURE_COORD_UNITS + 1];
GLuint numTcoords = 0;
GLfloat t0, dtdy;
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);
+ size = get_size(ctx, vert, GL_FALSE);
/* span init */
INIT_SPAN(span, GL_POINT);
span.interpMask = SPAN_Z | SPAN_RGBA;
+ span.facing = swrast->PointLineFacing;
+
span.red = ChanToFixed(vert->color[0]);
span.green = ChanToFixed(vert->color[1]);
span.blue = ChanToFixed(vert->color[2]);
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;
+ {
+ GLfloat s, r, dsdx;
+
+ /* texcoord / pointcoord interpolants */
+ s = 0.0;
+ dsdx = 1.0 / size;
+ if (ctx->Point.SpriteOrigin == GL_LOWER_LEFT) {
+ dtdy = 1.0 / size;
+ t0 = 0.5 * dtdy;
+ }
+ else {
+ /* GL_UPPER_LEFT */
+ dtdy = -1.0 / size;
+ t0 = 1.0 + 0.5 * dtdy;
+ }
+ 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]) {
+ 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;
+ }
+ }
+ else if (attr == FRAG_ATTRIB_FOGC) {
+ /* GLSL gl_PointCoord is stored in fog.zw */
+ span.attrStart[FRAG_ATTRIB_FOGC][2] = 0.0;
+ span.attrStart[FRAG_ATTRIB_FOGC][3] = 0.0; /* t0 set below */
+ span.attrStepX[FRAG_ATTRIB_FOGC][2] = dsdx;
+ span.attrStepX[FRAG_ATTRIB_FOGC][3] = 0.0;
+ span.attrStepY[FRAG_ATTRIB_FOGC][2] = 0.0;
+ span.attrStepY[FRAG_ATTRIB_FOGC][3] = dtdy;
+ tCoords[numTcoords++] = FRAG_ATTRIB_FOGC;
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
+ /* 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 */
{
}
else {
/* even size */
- xmin = (GLint) x - iRadius + 1;
+ /* 0.501 factor allows conformance to pass */
+ xmin = (GLint) (x + 0.501) - iRadius;
xmax = xmin + iSize - 1;
- ymin = (GLint) y - iRadius + 1;
+ ymin = (GLint) (y + 0.501) - iRadius;
ymax = ymin + iSize - 1;
}
GLuint i;
/* setup texcoord T for this row */
for (i = 0; i < numTcoords; i++) {
- span.attrStart[tCoords[i]][1] = tcoord;
+ if (tCoords[i] == FRAG_ATTRIB_FOGC)
+ span.attrStart[FRAG_ATTRIB_FOGC][3] = tcoord;
+ else
+ span.attrStart[tCoords[i]][1] = tcoord;
}
/* these might get changed by span clipping */
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);
+ size = get_size(ctx, vert, GL_TRUE);
/* alpha attenuation / fade factor */
- if (ctx->Multisample.Enabled) {
+ if (ctx->Multisample._Enabled) {
if (vert->pointSize >= ctx->Point.Threshold) {
alphaAtten = 1.0F;
}
span.interpMask = SPAN_Z | SPAN_RGBA;
span.arrayMask = SPAN_COVERAGE | SPAN_MASK;
+ span.facing = swrast->PointLineFacing;
+
span.red = ChanToFixed(vert->color[0]);
span.green = ChanToFixed(vert->color[1]);
span.blue = ChanToFixed(vert->color[2]);
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);
+ size = get_size(ctx, vert, GL_FALSE);
/* span init */
INIT_SPAN(span, GL_POINT);
span.arrayMask = SPAN_XY;
+ span.facing = swrast->PointLineFacing;
if (ciMode) {
span.interpMask = SPAN_Z | SPAN_INDEX;
}
else {
/* even size */
- xmin = (GLint) x - iRadius + 1;
+ /* 0.501 factor allows conformance to pass */
+ xmin = (GLint) (x + 0.501) - iRadius;
xmax = xmin + iSize - 1;
- ymin = (GLint) y - iRadius + 1;
+ ymin = (GLint) (y + 0.501) - iRadius;
ymax = ymin + iSize - 1;
}
/* 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;
+ (swrast->_RasterMask & (BLEND_BIT | LOGIC_OP_BIT | MASKING_BIT)) ||
+ span->facing != swrast->PointLineFacing) {
+ if (span->end > 0) {
+ if (ciMode)
+ _swrast_write_index_span(ctx, span);
+ else
+ _swrast_write_rgba_span(ctx, span);
+ span->end = 0;
+ }
}
count = span->end;
+ span->facing = swrast->PointLineFacing;
+
/* fragment attributes */
if (ciMode) {
span->array->index[count] = (GLuint) vert->attrib[FRAG_ATTRIB_CI][0];
else if (ctx->Point.SmoothFlag) {
swrast->Point = smooth_point;
}
- else if (ctx->Point._Size > 1.0 ||
+ else if (ctx->Point.Size > 1.0 ||
ctx->Point._Attenuated ||
ctx->VertexProgram.PointSizeEnabled) {
swrast->Point = large_point;
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