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-rw-r--r--src/mesa/main/points.c1158
1 files changed, 1 insertions, 1157 deletions
diff --git a/src/mesa/main/points.c b/src/mesa/main/points.c
index 5f42cd0371..ccac502ab1 100644
--- a/src/mesa/main/points.c
+++ b/src/mesa/main/points.c
@@ -1,4 +1,4 @@
-/* $Id: points.c,v 1.18 2000/10/30 13:32:01 keithw Exp $ */
+/* $Id: points.c,v 1.19 2000/10/31 18:09:44 keithw Exp $ */
/*
* Mesa 3-D graphics library
@@ -33,9 +33,7 @@
#include "feedback.h"
#include "macros.h"
#include "mmath.h"
-#include "pb.h"
#include "points.h"
-#include "span.h"
#include "texstate.h"
#include "types.h"
#include "vb.h"
@@ -123,1157 +121,3 @@ _mesa_PointParameterfvEXT( GLenum pname, const GLfloat *params)
ctx->NewState |= _NEW_POINT;
}
-
-/**********************************************************************/
-/***** Rasterization *****/
-/**********************************************************************/
-
-
-/*
- * There are 3 pairs (RGBA, CI) of point rendering functions:
- * 1. simple: size=1 and no special rasterization functions (fastest)
- * 2. size1: size=1 and any rasterization functions
- * 3. general: any size and rasterization functions (slowest)
- *
- * All point rendering functions take the same two arguments: first and
- * last which specify that the points specified by VB[first] through
- * VB[last] are to be rendered.
- */
-
-
-
-
-
-/*
- * CI points with size == 1.0
- */
-static void
-size1_ci_points( GLcontext *ctx, GLuint first, GLuint last )
-{
- struct vertex_buffer *VB = ctx->VB;
- struct pixel_buffer *PB = ctx->PB;
- GLfloat *win, *fog;
- GLint *pbx = PB->x, *pby = PB->y;
- GLdepth *pbz = PB->z;
- GLfixed *pbfog = PB->fog;
- GLuint *pbi = PB->index;
- GLuint pbcount = PB->count;
- GLuint i;
-
- win = &VB->Win.data[first][0];
- fog = &VB->FogCoordPtr->data[first];
-
- for (i = first; i <= last; i++) {
- if (VB->ClipMask[i] == 0) {
- pbx[pbcount] = (GLint) win[0];
- pby[pbcount] = (GLint) win[1];
- pbz[pbcount] = (GLint) (win[2] + ctx->PointZoffset);
- pbfog[pbcount] = FloatToFixed(fog[i]);
- pbi[pbcount] = VB->IndexPtr->data[i];
- pbcount++;
- }
- win += 3;
- }
- PB->count = pbcount;
- PB_CHECK_FLUSH(ctx, PB);
-}
-
-
-
-/*
- * RGBA points with size == 1.0
- */
-static void
-size1_rgba_points( GLcontext *ctx, GLuint first, GLuint last )
-{
- struct vertex_buffer *VB = ctx->VB;
- struct pixel_buffer *PB = ctx->PB;
- GLuint i;
-
- for (i = first; i <= last; i++) {
- if (VB->ClipMask[i] == 0) {
- GLint x, y, z;
- GLint fog;
- GLint red, green, blue, alpha;
-
- x = (GLint) VB->Win.data[i][0];
- y = (GLint) VB->Win.data[i][1];
- z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
-
- fog = FloatToFixed( VB->FogCoordPtr->data[i] );
-
- red = VB->ColorPtr->data[i][0];
- green = VB->ColorPtr->data[i][1];
- blue = VB->ColorPtr->data[i][2];
- alpha = VB->ColorPtr->data[i][3];
-
- PB_WRITE_RGBA_PIXEL( PB, x, y, z, fog, red, green, blue, alpha );
- }
- }
- PB_CHECK_FLUSH(ctx, PB);
-}
-
-
-
-/*
- * General CI points.
- */
-static void
-general_ci_points( GLcontext *ctx, GLuint first, GLuint last )
-{
- struct vertex_buffer *VB = ctx->VB;
- struct pixel_buffer *PB = ctx->PB;
- const GLint isize = (GLint) (ctx->Point.Size + 0.5F);
- GLint radius = isize >> 1;
- GLuint i;
-
- for (i = first; i <= last; i++) {
- if (VB->ClipMask[i] == 0) {
- GLint x0, x1, y0, y1;
- GLint ix, iy;
-
- GLint x = (GLint) VB->Win.data[i][0];
- GLint y = (GLint) VB->Win.data[i][1];
- GLint z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
-
- GLfixed fog = FloatToFixed( VB->FogCoordPtr->data[i] );
-
- if (isize & 1) {
- /* odd size */
- x0 = x - radius;
- x1 = x + radius;
- y0 = y - radius;
- y1 = y + radius;
- }
- else {
- /* even size */
- x0 = (GLint) (x + 1.5F) - radius;
- x1 = x0 + isize - 1;
- y0 = (GLint) (y + 1.5F) - radius;
- y1 = y0 + isize - 1;
- }
-
- PB_SET_INDEX( PB, VB->IndexPtr->data[i] );
-
- for (iy = y0; iy <= y1; iy++) {
- for (ix = x0; ix <= x1; ix++) {
- PB_WRITE_PIXEL( PB, ix, iy, z, fog );
- }
- }
- PB_CHECK_FLUSH(ctx,PB);
- }
- }
-}
-
-
-/*
- * General RGBA points.
- */
-static void
-general_rgba_points( GLcontext *ctx, GLuint first, GLuint last )
-{
- struct vertex_buffer *VB = ctx->VB;
- struct pixel_buffer *PB = ctx->PB;
- GLint isize = (GLint) (ctx->Point.Size + 0.5F);
- GLint radius = isize >> 1;
- GLuint i;
-
- for (i = first; i <= last; i++) {
- if (VB->ClipMask[i] == 0) {
- GLint x0, x1, y0, y1;
- GLint ix, iy;
-
- GLint x = (GLint) VB->Win.data[i][0];
- GLint y = (GLint) VB->Win.data[i][1];
- GLint z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
-
- GLfixed fog = FloatToFixed( VB->FogCoordPtr->data[i] );
-
- if (isize & 1) {
- /* odd size */
- x0 = x - radius;
- x1 = x + radius;
- y0 = y - radius;
- y1 = y + radius;
- }
- else {
- /* even size */
- x0 = (GLint) (x + 1.5F) - radius;
- x1 = x0 + isize - 1;
- y0 = (GLint) (y + 1.5F) - radius;
- y1 = y0 + isize - 1;
- }
-
- PB_SET_COLOR( PB,
- VB->ColorPtr->data[i][0],
- VB->ColorPtr->data[i][1],
- VB->ColorPtr->data[i][2],
- VB->ColorPtr->data[i][3] );
-
- for (iy = y0; iy <= y1; iy++) {
- for (ix = x0; ix <= x1; ix++) {
- PB_WRITE_PIXEL( PB, ix, iy, z, fog );
- }
- }
- PB_CHECK_FLUSH(ctx,PB);
- }
- }
-}
-
-
-
-
-/*
- * Textured RGBA points.
- */
-static void
-textured_rgba_points( GLcontext *ctx, GLuint first, GLuint last )
-{
- struct vertex_buffer *VB = ctx->VB;
- struct pixel_buffer *PB = ctx->PB;
- GLuint i;
-
- for (i = first; i <= last; i++) {
- if (VB->ClipMask[i] == 0) {
- GLint x0, x1, y0, y1;
- GLint ix, iy, radius;
- GLint red, green, blue, alpha;
- GLfloat s, t, u;
-
- GLint x = (GLint) VB->Win.data[i][0];
- GLint y = (GLint) VB->Win.data[i][1];
- GLint z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
- GLint isize = (GLint) (ctx->Point.Size + 0.5F);
-
- GLfixed fog = FloatToFixed( VB->FogCoordPtr->data[i] );
-
- if (isize < 1) {
- isize = 1;
- }
- radius = isize >> 1;
-
- if (isize & 1) {
- /* odd size */
- x0 = x - radius;
- x1 = x + radius;
- y0 = y - radius;
- y1 = y + radius;
- }
- else {
- /* even size */
- x0 = (GLint) (x + 1.5F) - radius;
- x1 = x0 + isize - 1;
- y0 = (GLint) (y + 1.5F) - radius;
- y1 = y0 + isize - 1;
- }
-
- red = VB->ColorPtr->data[i][0];
- green = VB->ColorPtr->data[i][1];
- blue = VB->ColorPtr->data[i][2];
- alpha = VB->ColorPtr->data[i][3];
-
- switch (VB->TexCoordPtr[0]->size) {
- case 4:
- s = VB->TexCoordPtr[0]->data[i][0]/VB->TexCoordPtr[0]->data[i][3];
- t = VB->TexCoordPtr[0]->data[i][1]/VB->TexCoordPtr[0]->data[i][3];
- u = VB->TexCoordPtr[0]->data[i][2]/VB->TexCoordPtr[0]->data[i][3];
- break;
- case 3:
- s = VB->TexCoordPtr[0]->data[i][0];
- t = VB->TexCoordPtr[0]->data[i][1];
- u = VB->TexCoordPtr[0]->data[i][2];
- break;
- case 2:
- s = VB->TexCoordPtr[0]->data[i][0];
- t = VB->TexCoordPtr[0]->data[i][1];
- u = 0.0;
- break;
- case 1:
- s = VB->TexCoordPtr[0]->data[i][0];
- t = 0.0;
- u = 0.0;
- break;
- default:
- /* should never get here */
- s = t = u = 0.0;
- gl_problem(ctx, "unexpected texcoord size in textured_rgba_points()");
- }
-
- for (iy = y0; iy <= y1; iy++) {
- for (ix = x0; ix <= x1; ix++) {
- PB_WRITE_TEX_PIXEL( PB, ix, iy, z, fog, red, green, blue, alpha,
- s, t, u );
- }
- }
-
- PB_CHECK_FLUSH(ctx, PB);
- }
- }
-}
-
-
-/*
- * Multitextured RGBA points.
- */
-static void
-multitextured_rgba_points( GLcontext *ctx, GLuint first, GLuint last )
-{
- struct vertex_buffer *VB = ctx->VB;
- struct pixel_buffer *PB = ctx->PB;
- GLuint i;
-
- for (i = first; i <= last; i++) {
- if (VB->ClipMask[i] == 0) {
- const GLint red = VB->ColorPtr->data[i][0];
- const GLint green = VB->ColorPtr->data[i][1];
- const GLint blue = VB->ColorPtr->data[i][2];
- const GLint alpha = VB->ColorPtr->data[i][3];
- const GLint sRed = VB->SecondaryColorPtr->data ? VB->SecondaryColorPtr->data[i][0] : 0;
- const GLint sGreen = VB->SecondaryColorPtr->data ? VB->SecondaryColorPtr->data[i][1] : 0;
- const GLint sBlue = VB->SecondaryColorPtr->data ? VB->SecondaryColorPtr->data[i][2] : 0;
- const GLint x = (GLint) VB->Win.data[i][0];
- const GLint y = (GLint) VB->Win.data[i][1];
- const GLint z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
- GLint x0, x1, y0, y1;
- GLint ix, iy;
- GLfloat texcoord[MAX_TEXTURE_UNITS][4];
- GLint radius, u;
- GLint isize = (GLint) (ctx->Point.Size + 0.5F);
-
- GLfixed fog = FloatToFixed( VB->FogCoordPtr->data[i] );
-
- if (isize < 1) {
- isize = 1;
- }
- radius = isize >> 1;
-
- if (isize & 1) {
- /* odd size */
- x0 = x - radius;
- x1 = x + radius;
- y0 = y - radius;
- y1 = y + radius;
- }
- else {
- /* even size */
- x0 = (GLint) (x + 1.5F) - radius;
- x1 = x0 + isize - 1;
- y0 = (GLint) (y + 1.5F) - radius;
- y1 = y0 + isize - 1;
- }
-
- for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
- if (ctx->Texture.Unit[u].ReallyEnabled) {
- switch (VB->TexCoordPtr[0]->size) {
- case 4:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0] /
- VB->TexCoordPtr[u]->data[i][3];
- texcoord[u][1] = VB->TexCoordPtr[u]->data[i][1] /
- VB->TexCoordPtr[u]->data[i][3];
- texcoord[u][2] = VB->TexCoordPtr[u]->data[i][2] /
- VB->TexCoordPtr[u]->data[i][3];
- break;
- case 3:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0];
- texcoord[u][1] = VB->TexCoordPtr[u]->data[i][1];
- texcoord[u][2] = VB->TexCoordPtr[u]->data[i][2];
- break;
- case 2:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0];
- texcoord[u][1] = VB->TexCoordPtr[u]->data[i][1];
- texcoord[u][2] = 0.0;
- break;
- case 1:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0];
- texcoord[u][1] = 0.0;
- texcoord[u][2] = 0.0;
- break;
- default:
- /* should never get here */
- gl_problem(ctx, "unexpected texcoord size");
- }
- }
- }
-
- for (iy = y0; iy <= y1; iy++) {
- for (ix = x0; ix <= x1; ix++) {
- PB_WRITE_MULTITEX_SPEC_PIXEL( PB, ix, iy, z, fog,
- red, green, blue, alpha,
- sRed, sGreen, sBlue,
- texcoord );
- }
- }
- PB_CHECK_FLUSH(ctx, PB);
- }
- }
-}
-
-
-/*
- * NOTES on aa point rasterization:
- *
- * Let d = distance of fragment center from vertex.
- * if d < rmin2 then
- * fragment has 100% coverage
- * else if d > rmax2 then
- * fragment has 0% coverage
- * else
- * fragement has % coverage = (d - rmin2) / (rmax2 - rmin2)
- */
-
-
-/*
- * Antialiased points with or without texture mapping.
- */
-static void
-antialiased_rgba_points( GLcontext *ctx, GLuint first, GLuint last )
-{
- struct vertex_buffer *VB = ctx->VB;
- struct pixel_buffer *PB = ctx->PB;
- const GLfloat radius = ctx->Point.Size * 0.5F;
- const GLfloat rmin = radius - 0.7071F; /* 0.7071 = sqrt(2)/2 */
- const GLfloat rmax = radius + 0.7071F;
- const GLfloat rmin2 = MAX2(0.0, rmin * rmin);
- const GLfloat rmax2 = rmax * rmax;
- const GLfloat cscale = 256.0F / (rmax2 - rmin2);
- GLuint i;
-
- if (ctx->Texture.ReallyEnabled) {
- for (i = first; i <= last; i++) {
- if (VB->ClipMask[i] == 0) {
- GLint x, y;
- GLfloat vx = VB->Win.data[i][0];
- GLfloat vy = VB->Win.data[i][1];
- const GLint xmin = (GLint) (vx - radius);
- const GLint xmax = (GLint) (vx + radius);
- const GLint ymin = (GLint) (vy - radius);
- const GLint ymax = (GLint) (vy + radius);
- const GLint z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
- const GLint red = VB->ColorPtr->data[i][0];
- const GLint green = VB->ColorPtr->data[i][1];
- const GLint blue = VB->ColorPtr->data[i][2];
- GLfloat texcoord[MAX_TEXTURE_UNITS][4];
- GLint u, alpha;
-
- GLfixed fog = FloatToFixed( VB->FogCoordPtr->data[i] );
-
- for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
- if (ctx->Texture.Unit[u].ReallyEnabled) {
- switch (VB->TexCoordPtr[0]->size) {
- case 4:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0] /
- VB->TexCoordPtr[u]->data[i][3];
- texcoord[u][1] = VB->TexCoordPtr[u]->data[i][1] /
- VB->TexCoordPtr[u]->data[i][3];
- texcoord[u][2] = VB->TexCoordPtr[u]->data[i][2] /
- VB->TexCoordPtr[u]->data[i][3];
- break;
- case 3:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0];
- texcoord[u][1] = VB->TexCoordPtr[u]->data[i][1];
- texcoord[u][2] = VB->TexCoordPtr[u]->data[i][2];
- break;
- case 2:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0];
- texcoord[u][1] = VB->TexCoordPtr[u]->data[i][1];
- texcoord[u][2] = 0.0;
- break;
- case 1:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0];
- texcoord[u][1] = 0.0;
- texcoord[u][2] = 0.0;
- break;
- default:
- /* should never get here */
- gl_problem(ctx, "unexpected texcoord size in antialiased_rgba_points()");
- }
- }
- }
-
- /* translate by a half pixel to simplify math below */
- vx -= 0.5F;
- vx -= 0.5F;
-
- for (y = ymin; y <= ymax; y++) {
- for (x = xmin; x <= xmax; x++) {
- const GLfloat dx = x - vx;
- const GLfloat dy = y - vy;
- const GLfloat dist2 = dx*dx + dy*dy;
- if (dist2 < rmax2) {
- alpha = VB->ColorPtr->data[i][3];
- if (dist2 >= rmin2) {
- GLint coverage = (GLint) (256.0F - (dist2 - rmin2) * cscale);
- /* coverage is in [0,256] */
- alpha = (alpha * coverage) >> 8;
- }
- if (ctx->Texture.MultiTextureEnabled) {
- PB_WRITE_MULTITEX_PIXEL( PB, x,y,z, fog,
- red, green, blue,
- alpha, texcoord );
- }
- else {
- PB_WRITE_TEX_PIXEL( PB, x,y,z, fog,
- red, green, blue, alpha,
- texcoord[0][0],
- texcoord[0][1],
- texcoord[0][2] );
- }
- }
- }
- }
-
- PB_CHECK_FLUSH(ctx,PB);
- }
- }
- }
- else {
- /* Not texture mapped */
- for (i=first;i<=last;i++) {
- if (VB->ClipMask[i]==0) {
- const GLint xmin = (GLint) (VB->Win.data[i][0] - 0.0 - radius);
- const GLint xmax = (GLint) (VB->Win.data[i][0] - 0.0 + radius);
- const GLint ymin = (GLint) (VB->Win.data[i][1] - 0.0 - radius);
- const GLint ymax = (GLint) (VB->Win.data[i][1] - 0.0 + radius);
- const GLint red = VB->ColorPtr->data[i][0];
- const GLint green = VB->ColorPtr->data[i][1];
- const GLint blue = VB->ColorPtr->data[i][2];
- const GLint z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
- GLint x, y;
-
- GLfixed fog = FloatToFixed( VB->FogCoordPtr->data[i] );
-
- /*
- printf("point %g, %g\n", VB->Win.data[i][0], VB->Win.data[i][1]);
- printf("%d..%d X %d..%d\n", xmin, xmax, ymin, ymax);
- */
- for (y = ymin; y <= ymax; y++) {
- for (x = xmin; x <= xmax; x++) {
- const GLfloat dx = x + 0.5F - VB->Win.data[i][0];
- const GLfloat dy = y + 0.5F - VB->Win.data[i][1];
- const GLfloat dist2 = dx*dx + dy*dy;
- if (dist2 < rmax2) {
- GLint alpha = VB->ColorPtr->data[i][3];
- if (dist2 >= rmin2) {
- GLint coverage = (GLint) (256.0F - (dist2 - rmin2) * cscale);
- /* coverage is in [0,256] */
- alpha = (alpha * coverage) >> 8;
- }
- PB_WRITE_RGBA_PIXEL(PB, x, y, z, fog,
- red, green, blue, alpha);
- }
- }
- }
- PB_CHECK_FLUSH(ctx,PB);
- }
- }
- }
-}
-
-
-
-/*
- * Null rasterizer for measuring transformation speed.
- */
-static void
-null_points( GLcontext *ctx, GLuint first, GLuint last )
-{
- (void) ctx;
- (void) first;
- (void) last;
-}
-
-
-
-/* Definition of the functions for GL_EXT_point_parameters */
-
-/* Calculates the distance attenuation formula of a vector of points in
- * eye space coordinates
- */
-static void
-dist3(GLfloat *out, GLuint first, GLuint last,
- const GLcontext *ctx, const GLvector4f *v)
-{
- GLuint stride = v->stride;
- const GLfloat *p = VEC_ELT(v, GLfloat, first);
- GLuint i;
-
- for (i = first ; i <= last ; i++, STRIDE_F(p, stride) ) {
- GLfloat dist = GL_SQRT(p[0]*p[0]+p[1]*p[1]+p[2]*p[2]);
- out[i] = 1.0F / (ctx->Point.Params[0] +
- dist * (ctx->Point.Params[1] +
- dist * ctx->Point.Params[2]));
- }
-}
-
-
-static void
-dist2(GLfloat *out, GLuint first, GLuint last,
- const GLcontext *ctx, const GLvector4f *v)
-{
- GLuint stride = v->stride;
- const GLfloat *p = VEC_ELT(v, GLfloat, first);
- GLuint i;
-
- for (i = first ; i <= last ; i++, STRIDE_F(p, stride) ) {
- GLfloat dist = GL_SQRT(p[0]*p[0]+p[1]*p[1]);
- out[i] = 1.0F / (ctx->Point.Params[0] +
- dist * (ctx->Point.Params[1] +
- dist * ctx->Point.Params[2]));
- }
-}
-
-
-typedef void (*dist_func)(GLfloat *out, GLuint first, GLuint last,
- const GLcontext *ctx, const GLvector4f *v);
-
-
-static dist_func eye_dist_tab[5] = {
- 0,
- 0,
- dist2,
- dist3,
- dist3
-};
-
-
-
-/*
- * Distance Attenuated General CI points.
- */
-static void
-dist_atten_general_ci_points( GLcontext *ctx, GLuint first, GLuint last )
-{
- struct vertex_buffer *VB = ctx->VB;
- struct pixel_buffer *PB = ctx->PB;
- GLfloat dist[VB_SIZE];
- const GLfloat psize = ctx->Point.Size;
- GLuint i;
-
- ASSERT(ctx->NeedEyeCoords);
- (eye_dist_tab[VB->EyePtr->size])( dist, first, last, ctx, VB->EyePtr );
-
-
- for (i=first;i<=last;i++) {
- if (VB->ClipMask[i]==0) {
- GLint x0, x1, y0, y1;
- GLint ix, iy;
- GLint isize, radius;
- GLint x = (GLint) VB->Win.data[i][0];
- GLint y = (GLint) VB->Win.data[i][1];
- GLint z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
- GLfloat dsize = psize * dist[i];
-
- GLfixed fog = FloatToFixed( VB->FogCoordPtr->data[i] );
-
- if (dsize >= ctx->Point.Threshold) {
- isize = (GLint) (MIN2(dsize, ctx->Point.MaxSize) + 0.5F);
- }
- else {
- isize = (GLint) (MAX2(ctx->Point.Threshold, ctx->Point.MinSize) + 0.5F);
- }
- radius = isize >> 1;
-
- if (isize & 1) {
- /* odd size */
- x0 = x - radius;
- x1 = x + radius;
- y0 = y - radius;
- y1 = y + radius;
- }
- else {
- /* even size */
- x0 = (GLint) (x + 1.5F) - radius;
- x1 = x0 + isize - 1;
- y0 = (GLint) (y + 1.5F) - radius;
- y1 = y0 + isize - 1;
- }
-
- PB_SET_INDEX( PB, VB->IndexPtr->data[i] );
-
- for (iy=y0;iy<=y1;iy++) {
- for (ix=x0;ix<=x1;ix++) {
- PB_WRITE_PIXEL( PB, ix, iy, z, fog );
- }
- }
- PB_CHECK_FLUSH(ctx,PB);
- }
- }
-}
-
-/*
- * Distance Attenuated General RGBA points.
- */
-static void
-dist_atten_general_rgba_points( GLcontext *ctx, GLuint first, GLuint last )
-{
- struct vertex_buffer *VB = ctx->VB;
- struct pixel_buffer *PB = ctx->PB;
- GLfloat dist[VB_SIZE];
- const GLfloat psize = ctx->Point.Size;
- GLuint i;
-
- ASSERT (ctx->NeedEyeCoords);
- (eye_dist_tab[VB->EyePtr->size])( dist, first, last, ctx, VB->EyePtr );
-
- for (i=first;i<=last;i++) {
- if (VB->ClipMask[i]==0) {
- GLint x0, x1, y0, y1;
- GLint ix, iy;
- GLint isize, radius;
- GLint x = (GLint) VB->Win.data[i][0];
- GLint y = (GLint) VB->Win.data[i][1];
- GLint z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
- GLfloat dsize=psize*dist[i];
- GLchan alpha;
- GLfixed fog = FloatToFixed( VB->FogCoordPtr->data[i] );
-
- if (dsize >= ctx->Point.Threshold) {
- isize = (GLint) (MIN2(dsize,ctx->Point.MaxSize)+0.5F);
- alpha = VB->ColorPtr->data[i][3];
- }
- else {
- isize = (GLint) (MAX2(ctx->Point.Threshold,ctx->Point.MinSize)+0.5F);
- dsize /= ctx->Point.Threshold;
- alpha = (GLint) (VB->ColorPtr->data[i][3]* (dsize*dsize));
- }
- radius = isize >> 1;
-
- if (isize & 1) {
- /* odd size */
- x0 = x - radius;
- x1 = x + radius;
- y0 = y - radius;
- y1 = y + radius;
- }
- else {
- /* even size */
- x0 = (GLint) (x + 1.5F) - radius;
- x1 = x0 + isize - 1;
- y0 = (GLint) (y + 1.5F) - radius;
- y1 = y0 + isize - 1;
- }
-
- PB_SET_COLOR( PB,
- VB->ColorPtr->data[i][0],
- VB->ColorPtr->data[i][1],
- VB->ColorPtr->data[i][2],
- alpha );
-
- for (iy = y0; iy <= y1; iy++) {
- for (ix = x0; ix <= x1; ix++) {
- PB_WRITE_PIXEL( PB, ix, iy, z, fog );
- }
- }
- PB_CHECK_FLUSH(ctx,PB);
- }
- }
-}
-
-/*
- * Distance Attenuated Textured RGBA points.
- */
-static void
-dist_atten_textured_rgba_points( GLcontext *ctx, GLuint first, GLuint last )
-{
- struct vertex_buffer *VB = ctx->VB;
- struct pixel_buffer *PB = ctx->PB;
- GLfloat dist[VB_SIZE];
- const GLfloat psize = ctx->Point.Size;
- GLuint i;
-
- ASSERT(ctx->NeedEyeCoords);
- (eye_dist_tab[VB->EyePtr->size])( dist, first, last, ctx, VB->EyePtr );
-
- for (i=first;i<=last;i++) {
- if (VB->ClipMask[i]==0) {
- const GLint x = (GLint) VB->Win.data[i][0];
- const GLint y = (GLint) VB->Win.data[i][1];
- const GLint z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
- const GLint red = VB->ColorPtr->data[i][0];
- const GLint green = VB->ColorPtr->data[i][1];
- const GLint blue = VB->ColorPtr->data[i][2];
- GLfloat texcoord[MAX_TEXTURE_UNITS][4];
- GLint x0, x1, y0, y1;
- GLint ix, iy, alpha, u;
- GLint isize, radius;
- GLfloat dsize = psize*dist[i];
-
- GLfixed fog = FloatToFixed( VB->FogCoordPtr->data[i] );
-
- /* compute point size and alpha */
- if (dsize >= ctx->Point.Threshold) {
- isize = (GLint) (MIN2(dsize, ctx->Point.MaxSize) + 0.5F);
- alpha = VB->ColorPtr->data[i][3];
- }
- else {
- isize = (GLint) (MAX2(ctx->Point.Threshold, ctx->Point.MinSize) + 0.5F);
- dsize /= ctx->Point.Threshold;
- alpha = (GLint) (VB->ColorPtr->data[i][3] * (dsize * dsize));
- }
- if (isize < 1) {
- isize = 1;
- }
- radius = isize >> 1;
-
- if (isize & 1) {
- /* odd size */
- x0 = x - radius;
- x1 = x + radius;
- y0 = y - radius;
- y1 = y + radius;
- }
- else {
- /* even size */
- x0 = (GLint) (x + 1.5F) - radius;
- x1 = x0 + isize - 1;
- y0 = (GLint) (y + 1.5F) - radius;
- y1 = y0 + isize - 1;
- }
-
- /* get texture coordinates */
- for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
- if (ctx->Texture.Unit[u].ReallyEnabled) {
- switch (VB->TexCoordPtr[0]->size) {
- case 4:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0] /
- VB->TexCoordPtr[u]->data[i][3];
- texcoord[u][1] = VB->TexCoordPtr[u]->data[i][1] /
- VB->TexCoordPtr[u]->data[i][3];
- texcoord[u][2] = VB->TexCoordPtr[u]->data[i][2] /
- VB->TexCoordPtr[u]->data[i][3];
- break;
- case 3:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0];
- texcoord[u][1] = VB->TexCoordPtr[u]->data[i][1];
- texcoord[u][2] = VB->TexCoordPtr[u]->data[i][2];
- break;
- case 2:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0];
- texcoord[u][1] = VB->TexCoordPtr[u]->data[i][1];
- texcoord[u][2] = 0.0;
- break;
- case 1:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0];
- texcoord[u][1] = 0.0;
- texcoord[u][2] = 0.0;
- break;
- default:
- /* should never get here */
- gl_problem(ctx, "unexpected texcoord size");
- }
- }
- }
-
- for (iy = y0; iy <= y1; iy++) {
- for (ix = x0; ix <= x1; ix++) {
- if (ctx->Texture.MultiTextureEnabled) {
- PB_WRITE_MULTITEX_PIXEL( PB, ix, iy, z, fog,
- red, green, blue, alpha,
- texcoord );
- }
- else {
- PB_WRITE_TEX_PIXEL( PB, ix, iy, z, fog,
- red, green, blue, alpha,
- texcoord[0][0],
- texcoord[0][1],
- texcoord[0][2] );
- }
- }
- }
- PB_CHECK_FLUSH(ctx,PB);
- }
- }
-}
-
-/*
- * Distance Attenuated Antialiased points with or without texture mapping.
- */
-static void
-dist_atten_antialiased_rgba_points( GLcontext *ctx, GLuint first, GLuint last )
-{
- struct vertex_buffer *VB = ctx->VB;
- struct pixel_buffer *PB = ctx->PB;
- GLfloat dist[VB_SIZE];
- const GLfloat psize = ctx->Point.Size;
- GLuint i;
-
- ASSERT(ctx->NeedEyeCoords);
- (eye_dist_tab[VB->EyePtr->size])( dist, first, last, ctx, VB->EyePtr );
-
- if (ctx->Texture.ReallyEnabled) {
- for (i=first;i<=last;i++) {
- if (VB->ClipMask[i]==0) {
- GLfloat radius, rmin, rmax, rmin2, rmax2, cscale, alphaf;
- GLint xmin, ymin, xmax, ymax;
- GLint x, y, z;
- GLint red, green, blue, alpha;
- GLfloat texcoord[MAX_TEXTURE_UNITS][4];
- GLfloat dsize = psize * dist[i];
- GLint u;
-
- GLfixed fog = FloatToFixed( VB->FogCoordPtr->data[i] );
-
- if (dsize >= ctx->Point.Threshold) {
- radius = MIN2(dsize, ctx->Point.MaxSize) * 0.5F;
- alphaf = 1.0F;
- }
- else {
- radius = (MAX2(ctx->Point.Threshold, ctx->Point.MinSize) * 0.5F);
- dsize /= ctx->Point.Threshold;
- alphaf = (dsize*dsize);
- }
- rmin = radius - 0.7071F; /* 0.7071 = sqrt(2)/2 */
- rmax = radius + 0.7071F;
- rmin2 = MAX2(0.0, rmin * rmin);
- rmax2 = rmax * rmax;
- cscale = 256.0F / (rmax2 - rmin2);
-
- xmin = (GLint) (VB->Win.data[i][0] - radius);
- xmax = (GLint) (VB->Win.data[i][0] + radius);
- ymin = (GLint) (VB->Win.data[i][1] - radius);
- ymax = (GLint) (VB->Win.data[i][1] + radius);
- z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
-
- red = VB->ColorPtr->data[i][0];
- green = VB->ColorPtr->data[i][1];
- blue = VB->ColorPtr->data[i][2];
-
- /* get texture coordinates */
- for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
- if (ctx->Texture.Unit[u].ReallyEnabled) {
- switch (VB->TexCoordPtr[0]->size) {
- case 4:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0] /
- VB->TexCoordPtr[u]->data[i][3];
- texcoord[u][1] = VB->TexCoordPtr[u]->data[i][1] /
- VB->TexCoordPtr[u]->data[i][3];
- texcoord[u][2] = VB->TexCoordPtr[u]->data[i][2] /
- VB->TexCoordPtr[u]->data[i][3];
- break;
- case 3:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0];
- texcoord[u][1] = VB->TexCoordPtr[u]->data[i][1];
- texcoord[u][2] = VB->TexCoordPtr[u]->data[i][2];
- break;
- case 2:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0];
- texcoord[u][1] = VB->TexCoordPtr[u]->data[i][1];
- texcoord[u][2] = 0.0;
- break;
- case 1:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0];
- texcoord[u][1] = 0.0;
- texcoord[u][2] = 0.0;
- break;
- default:
- /* should never get here */
- gl_problem(ctx, "unexpected texcoord size");
- }
- }
- }
-
- for (y = ymin; y <= ymax; y++) {
- for (x = xmin; x <= xmax; x++) {
- const GLfloat dx = x + 0.5F - VB->Win.data[i][0];
- const GLfloat dy = y + 0.5F - VB->Win.data[i][1];
- const GLfloat dist2 = dx*dx + dy*dy;
- if (dist2 < rmax2) {
- alpha = VB->ColorPtr->data[i][3];
- if (dist2 >= rmin2) {
- GLint coverage = (GLint) (256.0F - (dist2 - rmin2) * cscale);
- /* coverage is in [0,256] */
- alpha = (alpha * coverage) >> 8;
- }
- alpha = (GLint) (alpha * alphaf);
- if (ctx->Texture.MultiTextureEnabled) {
- PB_WRITE_MULTITEX_PIXEL( PB, x, y, z, fog,
- red, green, blue, alpha,
- texcoord );
- }
- else {
- PB_WRITE_TEX_PIXEL( PB, x,y,z, fog,
- red, green, blue, alpha,
- texcoord[0][0],
- texcoord[0][1],
- texcoord[0][2] );
- }
- }
- }
- }
- PB_CHECK_FLUSH(ctx,PB);
- }
- }
- }
- else {
- /* Not texture mapped */
- for (i = first; i <= last; i++) {
- if (VB->ClipMask[i] == 0) {
- GLfloat radius, rmin, rmax, rmin2, rmax2, cscale, alphaf;
- GLint xmin, ymin, xmax, ymax;
- GLint x, y, z;
- GLfixed fog;
- GLint red, green, blue, alpha;
- GLfloat dsize = psize * dist[i];
-
- if (dsize >= ctx->Point.Threshold) {
- radius = MIN2(dsize, ctx->Point.MaxSize) * 0.5F;
- alphaf = 1.0F;
- }
- else {
- radius = (MAX2(ctx->Point.Threshold, ctx->Point.MinSize) * 0.5F);
- dsize /= ctx->Point.Threshold;
- alphaf = dsize * dsize;
- }
- rmin = radius - 0.7071F; /* 0.7071 = sqrt(2)/2 */
- rmax = radius + 0.7071F;
- rmin2 = MAX2(0.0, rmin * rmin);
- rmax2 = rmax * rmax;
- cscale = 256.0F / (rmax2 - rmin2);
-
- xmin = (GLint) (VB->Win.data[i][0] - radius);
- xmax = (GLint) (VB->Win.data[i][0] + radius);
- ymin = (GLint) (VB->Win.data[i][1] - radius);
- ymax = (GLint) (VB->Win.data[i][1] + radius);
- z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
-
- fog = FloatToFixed( VB->FogCoordPtr->data[i] );
-
- red = VB->ColorPtr->data[i][0];
- green = VB->ColorPtr->data[i][1];
- blue = VB->ColorPtr->data[i][2];
-
- for (y = ymin; y <= ymax; y++) {
- for (x = xmin; x <= xmax; x++) {
- const GLfloat dx = x + 0.5F - VB->Win.data[i][0];
- const GLfloat dy = y + 0.5F - VB->Win.data[i][1];
- const GLfloat dist2 = dx * dx + dy * dy;
- if (dist2 < rmax2) {
- alpha = VB->ColorPtr->data[i][3];
- if (dist2 >= rmin2) {
- GLint coverage = (GLint) (256.0F - (dist2 - rmin2) * cscale);
- /* coverage is in [0,256] */
- alpha = (alpha * coverage) >> 8;
- }
- alpha = (GLint) (alpha * alphaf);
- PB_WRITE_RGBA_PIXEL(PB, x, y, z, fog,
- red, green, blue, alpha);
- }
- }
- }
- PB_CHECK_FLUSH(ctx,PB);
- }
- }
- }
-}
-
-
-#ifdef DEBUG
-void
-_mesa_print_points_function(GLcontext *ctx)
-{
- printf("Point Func == ");
- if (ctx->Driver.PointsFunc == size1_ci_points)
- printf("size1_ci_points\n");
- else if (ctx->Driver.PointsFunc == size1_rgba_points)
- printf("size1_rgba_points\n");
- else if (ctx->Driver.PointsFunc == general_ci_points)
- printf("general_ci_points\n");
- else if (ctx->Driver.PointsFunc == general_rgba_points)
- printf("general_rgba_points\n");
- else if (ctx->Driver.PointsFunc == textured_rgba_points)
- printf("textured_rgba_points\n");
- else if (ctx->Driver.PointsFunc == multitextured_rgba_points)
- printf("multitextured_rgba_points\n");
- else if (ctx->Driver.PointsFunc == antialiased_rgba_points)
- printf("antialiased_rgba_points\n");
- else if (ctx->Driver.PointsFunc == null_points)
- printf("null_points\n");
- else if (ctx->Driver.PointsFunc == dist_atten_general_ci_points)
- printf("dist_atten_general_ci_points\n");
- else if (ctx->Driver.PointsFunc == dist_atten_general_rgba_points)
- printf("dist_atten_general_rgba_points\n");
- else if (ctx->Driver.PointsFunc == dist_atten_textured_rgba_points)
- printf("dist_atten_textured_rgba_points\n");
- else if (ctx->Driver.PointsFunc == dist_atten_antialiased_rgba_points)
- printf("dist_atten_antialiased_rgba_points\n");
- else if (!ctx->Driver.PointsFunc)
- printf("NULL\n");
- else
- printf("Driver func %p\n", ctx->Driver.PointsFunc);
-}
-#endif
-
-
-/*
- * Examine the current context to determine which point drawing function
- * should be used.
- */
-void gl_set_point_function( GLcontext *ctx )
-{
- GLboolean rgbmode = ctx->Visual.RGBAflag;
-
- if (ctx->RenderMode==GL_RENDER) {
- if (ctx->NoRaster) {
- ctx->Driver.PointsFunc = null_points;
- return;
- }
- if (ctx->Driver.PointsFunc) {
- /* Device driver will draw points. */
- ctx->IndirectTriangles &= ~DD_POINT_SW_RASTERIZE;
- return;
- }
-
- if (!ctx->Point.Attenuated) {
- if (ctx->Point.SmoothFlag && rgbmode) {
- ctx->Driver.PointsFunc = antialiased_rgba_points;
- }
- else if (ctx->Texture.ReallyEnabled) {
- if (ctx->Texture.MultiTextureEnabled ||
- ctx->Light.Model.ColorControl==GL_SEPARATE_SPECULAR_COLOR ||
- ctx->Fog.ColorSumEnabled) {
- ctx->Driver.PointsFunc = multitextured_rgba_points;
- }
- else {
- ctx->Driver.PointsFunc = textured_rgba_points;
- }
- }
- else if (ctx->Point.Size==1.0) {
- /* size=1, any raster ops */
- if (rgbmode)
- ctx->Driver.PointsFunc = size1_rgba_points;
- else
- ctx->Driver.PointsFunc = size1_ci_points;
- }
- else {
- /* every other kind of point rendering */
- if (rgbmode)
- ctx->Driver.PointsFunc = general_rgba_points;
- else
- ctx->Driver.PointsFunc = general_ci_points;
- }
- }
- else if(ctx->Point.SmoothFlag && rgbmode) {
- ctx->Driver.PointsFunc = dist_atten_antialiased_rgba_points;
- }
- else if (ctx->Texture.ReallyEnabled) {
- ctx->Driver.PointsFunc = dist_atten_textured_rgba_points;
- }
- else {
- /* every other kind of point rendering */
- if (rgbmode)
- ctx->Driver.PointsFunc = dist_atten_general_rgba_points;
- else
- ctx->Driver.PointsFunc = dist_atten_general_ci_points;
- }
- }
- else if (ctx->RenderMode==GL_FEEDBACK) {
- ctx->Driver.PointsFunc = gl_feedback_points;
- }
- else {
- /* GL_SELECT mode */
- ctx->Driver.PointsFunc = gl_select_points;
- }
-
- /*_mesa_print_points_function(ctx);*/
-}
-
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-12 08:19:31 +0000