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Diffstat (limited to 'src/mesa/swrast/s_points.c')
-rw-r--r--src/mesa/swrast/s_points.c564
1 files changed, 0 insertions, 564 deletions
diff --git a/src/mesa/swrast/s_points.c b/src/mesa/swrast/s_points.c
deleted file mode 100644
index 04c85b3b74c..00000000000
--- a/src/mesa/swrast/s_points.c
+++ /dev/null
@@ -1,564 +0,0 @@
-/*
- * Mesa 3-D graphics library
- *
- * 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"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
- * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
- * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
- */
-
-#include "main/framebuffer.h"
-#include "main/glheader.h"
-#include "main/macros.h"
-#include "s_context.h"
-#include "s_feedback.h"
-#include "s_points.h"
-#include "s_span.h"
-
-
-/**
- * Used to cull points with invalid coords
- */
-#define CULL_INVALID(V) \
- do { \
- float tmp = (V)->attrib[VARYING_SLOT_POS][0] \
- + (V)->attrib[VARYING_SLOT_POS][1]; \
- if (util_is_inf_or_nan(tmp)) \
- return; \
- } 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 struct gl_context *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
- */
-static void
-sprite_point(struct gl_context *ctx, const SWvertex *vert)
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- SWspan span;
- GLfloat size;
- GLuint tCoords[MAX_TEXTURE_COORD_UNITS + 1];
- GLuint numTcoords = 0;
- GLfloat t0, dtdy;
-
- CULL_INVALID(vert);
-
- /* z coord */
- if (ctx->DrawBuffer->Visual.depthBits <= 16)
- span.z = FloatToFixed(vert->attrib[VARYING_SLOT_POS][2] + 0.5F);
- else
- span.z = (GLuint) (vert->attrib[VARYING_SLOT_POS][2] + 0.5F);
- span.zStep = 0;
-
- 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.alpha = ChanToFixed(vert->color[3]);
- span.redStep = 0;
- span.greenStep = 0;
- span.blueStep = 0;
- span.alphaStep = 0;
-
- /* need these for fragment programs */
- span.attrStart[VARYING_SLOT_POS][3] = 1.0F;
- span.attrStepX[VARYING_SLOT_POS][3] = 0.0F;
- span.attrStepY[VARYING_SLOT_POS][3] = 0.0F;
-
- {
- GLfloat s, dsdx;
-
- /* texcoord / pointcoord interpolants */
- s = 0.0F;
- dsdx = 1.0F / size;
- if (ctx->Point.SpriteOrigin == GL_LOWER_LEFT) {
- dtdy = 1.0F / size;
- t0 = 0.5F * dtdy;
- }
- else {
- /* GL_UPPER_LEFT */
- dtdy = -1.0F / size;
- t0 = 1.0F + 0.5F * dtdy;
- }
-
- ATTRIB_LOOP_BEGIN
- if (attr >= VARYING_SLOT_TEX0 && attr <= VARYING_SLOT_TEX7) {
- /* a texcoord attribute */
- const GLuint u = attr - VARYING_SLOT_TEX0;
- assert(u < MAX_TEXTURE_COORD_UNITS);
- if (ctx->Point.CoordReplace & (1u << u)) {
- tCoords[numTcoords++] = attr;
-
- span.attrStart[attr][0] = s;
- span.attrStart[attr][1] = 0.0; /* overwritten below */
- span.attrStart[attr][2] = 0.0;
- 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 == VARYING_SLOT_PNTC) {
- /* GLSL gl_PointCoord.xy (.zw undefined) */
- span.attrStart[VARYING_SLOT_PNTC][0] = 0.0;
- span.attrStart[VARYING_SLOT_PNTC][1] = 0.0; /* t0 set below */
- span.attrStepX[VARYING_SLOT_PNTC][0] = dsdx;
- span.attrStepX[VARYING_SLOT_PNTC][1] = 0.0;
- span.attrStepY[VARYING_SLOT_PNTC][0] = 0.0;
- span.attrStepY[VARYING_SLOT_PNTC][1] = dtdy;
- tCoords[numTcoords++] = VARYING_SLOT_PNTC;
- 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[VARYING_SLOT_POS][0];
- const GLfloat y = vert->attrib[VARYING_SLOT_POS][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 */
- /* 0.501 factor allows conformance to pass */
- xmin = (GLint) (x + 0.501F) - iRadius;
- xmax = xmin + iSize - 1;
- ymin = (GLint) (y + 0.501F) - iRadius;
- 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;
- }
-
- /* these might get changed by span clipping */
- span.x = xmin;
- span.y = iy;
- span.end = xmax - xmin + 1;
-
- _swrast_write_rgba_span(ctx, &span);
-
- tcoord += dtdy;
- }
- }
-}
-
-
-/**
- * Draw smooth/antialiased point. RGB or CI mode.
- */
-static void
-smooth_point(struct gl_context *ctx, const SWvertex *vert)
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- SWspan span;
- GLfloat size, alphaAtten;
-
- CULL_INVALID(vert);
-
- /* z coord */
- if (ctx->DrawBuffer->Visual.depthBits <= 16)
- span.z = FloatToFixed(vert->attrib[VARYING_SLOT_POS][2] + 0.5F);
- else
- span.z = (GLuint) (vert->attrib[VARYING_SLOT_POS][2] + 0.5F);
- span.zStep = 0;
-
- size = get_size(ctx, vert, GL_TRUE);
-
- /* alpha attenuation / fade factor */
- if (_mesa_is_multisample_enabled(ctx)) {
- 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);
- 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.alpha = ChanToFixed(vert->color[3]);
- span.redStep = 0;
- span.greenStep = 0;
- span.blueStep = 0;
- span.alphaStep = 0;
-
- /* need these for fragment programs */
- span.attrStart[VARYING_SLOT_POS][3] = 1.0F;
- span.attrStepX[VARYING_SLOT_POS][3] = 0.0F;
- span.attrStepY[VARYING_SLOT_POS][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[VARYING_SLOT_POS][0];
- const GLfloat y = vert->attrib[VARYING_SLOT_POS][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;
- }
- 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);
-
- }
- }
-}
-
-
-/**
- * Draw large (size >= 1) non-AA point. RGB or CI mode.
- */
-static void
-large_point(struct gl_context *ctx, const SWvertex *vert)
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- SWspan span;
- GLfloat size;
-
- CULL_INVALID(vert);
-
- /* z coord */
- if (ctx->DrawBuffer->Visual.depthBits <= 16)
- span.z = FloatToFixed(vert->attrib[VARYING_SLOT_POS][2] + 0.5F);
- else
- span.z = (GLuint) (vert->attrib[VARYING_SLOT_POS][2] + 0.5F);
- span.zStep = 0;
-
- size = get_size(ctx, vert, GL_FALSE);
-
- /* span init */
- INIT_SPAN(span, GL_POINT);
- span.arrayMask = SPAN_XY;
- span.facing = swrast->PointLineFacing;
-
- 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[VARYING_SLOT_POS][3] = 1.0F;
- span.attrStepX[VARYING_SLOT_POS][3] = 0.0F;
- span.attrStepY[VARYING_SLOT_POS][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[VARYING_SLOT_POS][0];
- const GLfloat y = vert->attrib[VARYING_SLOT_POS][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 */
- /* 0.501 factor allows conformance to pass */
- xmin = (GLint) (x + 0.501F) - iRadius;
- xmax = xmin + iSize - 1;
- ymin = (GLint) (y + 0.501F) - iRadius;
- ymax = ymin + iSize - 1;
- }
-
- /* 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 <= SWRAST_MAX_WIDTH);
- _swrast_write_rgba_span(ctx, &span);
- }
-}
-
-
-/**
- * Draw size=1, single-pixel point
- */
-static void
-pixel_point(struct gl_context *ctx, const SWvertex *vert)
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- /*
- * 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;
- span->arrayMask |= SPAN_RGBA;
- /*span->arrayMask |= SPAN_LAMBDA;*/
- span->arrayAttribs = swrast->_ActiveAttribMask; /* we'll produce these vals */
-
- /* need these for fragment programs */
- span->attrStart[VARYING_SLOT_POS][3] = 1.0F;
- span->attrStepX[VARYING_SLOT_POS][3] = 0.0F;
- span->attrStepY[VARYING_SLOT_POS][3] = 0.0F;
-
- /* check if we need to flush */
- if (span->end >= SWRAST_MAX_WIDTH ||
- (swrast->_RasterMask & (BLEND_BIT | LOGIC_OP_BIT | MASKING_BIT)) ||
- span->facing != swrast->PointLineFacing) {
- if (span->end > 0) {
- _swrast_write_rgba_span(ctx, span);
- span->end = 0;
- }
- }
-
- count = span->end;
-
- span->facing = swrast->PointLineFacing;
-
- /* fragment attributes */
- 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[VARYING_SLOT_POS][0];
- span->array->y[count] = (GLint) vert->attrib[VARYING_SLOT_POS][1];
- span->array->z[count] = (GLint) (vert->attrib[VARYING_SLOT_POS][2] + 0.5F);
-
- span->end = count + 1;
- assert(span->end <= SWRAST_MAX_WIDTH);
-}
-
-
-/**
- * Add specular color to primary color, draw point, restore original
- * primary color.
- */
-void
-_swrast_add_spec_terms_point(struct gl_context *ctx, const SWvertex *v0)
-{
- SWvertex *ncv0 = (SWvertex *) v0; /* cast away const */
- GLfloat rSum, gSum, bSum;
- GLchan cSave[4];
-
- /* save */
- COPY_CHAN4(cSave, ncv0->color);
- /* sum */
- rSum = CHAN_TO_FLOAT(ncv0->color[0]) + ncv0->attrib[VARYING_SLOT_COL1][0];
- gSum = CHAN_TO_FLOAT(ncv0->color[1]) + ncv0->attrib[VARYING_SLOT_COL1][1];
- bSum = CHAN_TO_FLOAT(ncv0->color[2]) + ncv0->attrib[VARYING_SLOT_COL1][2];
- UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[0], rSum);
- UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[1], gSum);
- UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[2], bSum);
- /* draw */
- SWRAST_CONTEXT(ctx)->SpecPoint(ctx, ncv0);
- /* restore */
- COPY_CHAN4(ncv0->color, cSave);
-}
-
-
-/**
- * Examine current state to determine which point drawing function to use.
- */
-void
-_swrast_choose_point(struct gl_context *ctx)
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- const GLfloat size = CLAMP(ctx->Point.Size,
- ctx->Point.MinSize,
- ctx->Point.MaxSize);
-
- if (ctx->RenderMode == GL_RENDER) {
- if (ctx->Point.PointSprite) {
- swrast->Point = sprite_point;
- }
- else if (ctx->Point.SmoothFlag) {
- swrast->Point = smooth_point;
- }
- else if (size > 1.0F ||
- ctx->Point._Attenuated ||
- ctx->VertexProgram.PointSizeEnabled) {
- swrast->Point = large_point;
- }
- else {
- swrast->Point = pixel_point;
- }
- }
- else if (ctx->RenderMode == GL_FEEDBACK) {
- swrast->Point = _swrast_feedback_point;
- }
- else {
- /* GL_SELECT mode */
- swrast->Point = _swrast_select_point;
- }
-}
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