-/* $Id: s_aaline.c,v 1.4 2001/01/23 23:39:37 brianp Exp $ */
-
/*
* Mesa 3-D graphics library
- * Version: 3.5
*
- * Copyright (C) 1999-2001 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"),
* 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
- * BRIAN PAUL 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.
+ * 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 "glheader.h"
+#include "c99_math.h"
+#include "main/glheader.h"
+#include "main/imports.h"
+#include "main/macros.h"
+#include "main/mtypes.h"
+#include "main/teximage.h"
#include "swrast/s_aaline.h"
-#include "swrast/s_pb.h"
#include "swrast/s_context.h"
+#include "swrast/s_span.h"
#include "swrast/swrast.h"
-#include "mtypes.h"
-
#define SUB_PIXEL 4
/* DO_Z */
GLfloat zPlane[4];
- /* DO_FOG */
- GLfloat fPlane[4];
- /* DO_RGBA */
+ /* DO_RGBA - always enabled */
GLfloat rPlane[4], gPlane[4], bPlane[4], aPlane[4];
- /* DO_INDEX */
- GLfloat iPlane[4];
- /* DO_SPEC */
- GLfloat srPlane[4], sgPlane[4], sbPlane[4];
- /* DO_TEX or DO_MULTITEX */
- GLfloat sPlane[MAX_TEXTURE_UNITS][4];
- GLfloat tPlane[MAX_TEXTURE_UNITS][4];
- GLfloat uPlane[MAX_TEXTURE_UNITS][4];
- GLfloat vPlane[MAX_TEXTURE_UNITS][4];
- GLfloat lambda[MAX_TEXTURE_UNITS];
- GLfloat texWidth[MAX_TEXTURE_UNITS], texHeight[MAX_TEXTURE_UNITS];
+ /* DO_ATTRIBS */
+ GLfloat wPlane[4];
+ GLfloat attrPlane[VARYING_SLOT_MAX][4][4];
+ GLfloat lambda[VARYING_SLOT_MAX];
+ GLfloat texWidth[VARYING_SLOT_MAX];
+ GLfloat texHeight[VARYING_SLOT_MAX];
+
+ SWspan span;
};
const GLfloat b = pz * py;
const GLfloat c = px * px + py * py;
const GLfloat d = -(a * x0 + b * y0 + c * z0);
- plane[0] = a;
- plane[1] = b;
- plane[2] = c;
- plane[3] = d;
+ if (a == 0.0F && b == 0.0F && c == 0.0F && d == 0.0F) {
+ plane[0] = 0.0F;
+ plane[1] = 0.0F;
+ plane[2] = 1.0F;
+ plane[3] = 0.0F;
+ }
+ else {
+ plane[0] = a;
+ plane[1] = b;
+ plane[2] = c;
+ plane[3] = d;
+ }
#endif
}
-static INLINE void
+static inline void
constant_plane(GLfloat value, GLfloat plane[4])
{
- plane[0] = 0.0;
- plane[1] = 0.0;
- plane[2] = -1.0;
+ plane[0] = 0.0F;
+ plane[1] = 0.0F;
+ plane[2] = -1.0F;
plane[3] = value;
}
-static INLINE GLfloat
+static inline GLfloat
solve_plane(GLfloat x, GLfloat y, const GLfloat plane[4])
{
- GLfloat z = (plane[3] + plane[0] * x + plane[1] * y) / -plane[2];
+ const GLfloat z = (plane[3] + plane[0] * x + plane[1] * y) / -plane[2];
return z;
}
/*
* Return 1 / solve_plane().
*/
-static INLINE GLfloat
+static inline GLfloat
solve_plane_recip(GLfloat x, GLfloat y, const GLfloat plane[4])
{
- GLfloat z = -plane[2] / (plane[3] + plane[0] * x + plane[1] * y);
- return z;
+ const GLfloat denom = plane[3] + plane[0] * x + plane[1] * y;
+ if (denom == 0.0F)
+ return 0.0F;
+ else
+ return -plane[2] / denom;
}
/*
* Solve plane and return clamped GLchan value.
*/
-static INLINE GLchan
+static inline GLchan
solve_plane_chan(GLfloat x, GLfloat y, const GLfloat plane[4])
{
- GLfloat z = (plane[3] + plane[0] * x + plane[1] * y) / -plane[2] + 0.5F;
- if (z < 0.0F)
+ const GLfloat z = (plane[3] + plane[0] * x + plane[1] * y) / -plane[2];
+#if CHAN_TYPE == GL_FLOAT
+ return CLAMP(z, 0.0F, CHAN_MAXF);
+#else
+ if (z < 0)
return 0;
- else if (z > CHAN_MAXF)
- return CHAN_MAXF;
- return (GLchan) (GLint) z;
+ else if (z > CHAN_MAX)
+ return CHAN_MAX;
+ return (GLchan) IROUND_POS(z);
+#endif
}
/*
* Compute mipmap level of detail.
*/
-static INLINE GLfloat
+static inline GLfloat
compute_lambda(const GLfloat sPlane[4], const GLfloat tPlane[4],
GLfloat invQ, GLfloat width, GLfloat height)
{
GLfloat r2 = dvdx * dvdx + dvdy * dvdy;
GLfloat rho2 = r1 + r2;
/* return log base 2 of rho */
- return log(rho2) * 1.442695 * 0.5; /* 1.442695 = 1/log(2) */
+ if (rho2 == 0.0F)
+ return 0.0;
+ else
+ return logf(rho2) * 1.442695f * 0.5f;/* 1.442695 = 1/log(2) */
}
else {
j = i++;
}
- samples[j][0] = x * dx;
- samples[j][1] = y * dy;
+ samples[j][0] = x * dx + 0.5F * dx;
+ samples[j][1] = y * dy + 0.5F * dy;
}
}
}
}
-
-typedef void (*plot_func)(GLcontext *ctx, const struct LineInfo *line,
- struct pixel_buffer *pb, int ix, int iy);
+typedef void (*plot_func)(struct gl_context *ctx, struct LineInfo *line,
+ int ix, int iy);
+
/*
* Draw an AA line segment (called many times per line when stippling)
*/
static void
-segment(GLcontext *ctx,
+segment(struct gl_context *ctx,
struct LineInfo *line,
plot_func plot,
- struct pixel_buffer *pb,
GLfloat t0, GLfloat t1)
{
const GLfloat absDx = (line->dx < 0.0F) ? -line->dx : line->dx;
if (x0 < x1) {
xLeft = x0 - line->halfWidth;
xRight = x1 + line->halfWidth;
- if (line->dy >= 0.0) {
- yBot = y0 - 3.0 * line->halfWidth;
+ if (line->dy >= 0.0F) {
+ yBot = y0 - 3.0F * line->halfWidth;
yTop = y0 + line->halfWidth;
}
else {
yBot = y0 - line->halfWidth;
- yTop = y0 + 3.0 * line->halfWidth;
+ yTop = y0 + 3.0F * line->halfWidth;
}
}
else {
xLeft = x1 - line->halfWidth;
xRight = x0 + line->halfWidth;
- if (line->dy <= 0.0) {
- yBot = y1 - 3.0 * line->halfWidth;
+ if (line->dy <= 0.0F) {
+ yBot = y1 - 3.0F * line->halfWidth;
yTop = y1 + line->halfWidth;
}
else {
yBot = y1 - line->halfWidth;
- yTop = y1 + 3.0 * line->halfWidth;
+ yTop = y1 + 3.0F * line->halfWidth;
}
}
GLint iy;
/* scan across the line, bottom-to-top */
for (iy = iyBot; iy < iyTop; iy++) {
- (*plot)(ctx, line, pb, ix, iy);
+ (*plot)(ctx, line, ix, iy);
}
yBot += dydx;
yTop += dydx;
if (y0 < y1) {
yBot = y0 - line->halfWidth;
yTop = y1 + line->halfWidth;
- if (line->dx >= 0.0) {
- xLeft = x0 - 3.0 * line->halfWidth;
+ if (line->dx >= 0.0F) {
+ xLeft = x0 - 3.0F * line->halfWidth;
xRight = x0 + line->halfWidth;
}
else {
xLeft = x0 - line->halfWidth;
- xRight = x0 + 3.0 * line->halfWidth;
+ xRight = x0 + 3.0F * line->halfWidth;
}
}
else {
yBot = y1 - line->halfWidth;
yTop = y0 + line->halfWidth;
- if (line->dx <= 0.0) {
- xLeft = x1 - 3.0 * line->halfWidth;
+ if (line->dx <= 0.0F) {
+ xLeft = x1 - 3.0F * line->halfWidth;
xRight = x1 + line->halfWidth;
}
else {
xLeft = x1 - line->halfWidth;
- xRight = x1 + 3.0 * line->halfWidth;
+ xRight = x1 + 3.0F * line->halfWidth;
}
}
GLint ix;
/* scan across the line, left-to-right */
for (ix = ixLeft; ix < ixRight; ix++) {
- (*plot)(ctx, line, pb, ix, iy);
+ (*plot)(ctx, line, ix, iy);
}
xLeft += dxdy;
xRight += dxdy;
}
-#define NAME(x) aa_ci_##x
-#define DO_Z
-#define DO_FOG
-#define DO_INDEX
-#include "s_aalinetemp.h"
-
-
#define NAME(x) aa_rgba_##x
#define DO_Z
-#define DO_FOG
-#define DO_RGBA
-#include "s_aalinetemp.h"
-
-
-#define NAME(x) aa_tex_rgba_##x
-#define DO_Z
-#define DO_FOG
-#define DO_RGBA
-#define DO_TEX
#include "s_aalinetemp.h"
-#define NAME(x) aa_multitex_rgba_##x
+#define NAME(x) aa_general_rgba_##x
#define DO_Z
-#define DO_RGBA
-#define DO_MULTITEX
-#define DO_SPEC
+#define DO_ATTRIBS
#include "s_aalinetemp.h"
void
-_swrast_choose_aa_line_function(GLcontext *ctx)
+_swrast_choose_aa_line_function(struct gl_context *ctx)
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
- ASSERT(ctx->Line.SmoothFlag);
-
- if (ctx->Visual.rgbMode) {
- /* RGBA */
- if (ctx->Texture._ReallyEnabled) {
- if (swrast->_MultiTextureEnabled
- || ctx->Light.Model.ColorControl==GL_SEPARATE_SPECULAR_COLOR
- || ctx->Fog.ColorSumEnabled)
- /* Multitextured! */
- swrast->Line = aa_multitex_rgba_line;
- else
- swrast->Line = aa_tex_rgba_line;
- }
- else {
- swrast->Line = aa_rgba_line;
- }
+ assert(ctx->Line.SmoothFlag);
+
+ if (ctx->Texture._EnabledCoordUnits != 0
+ || _swrast_use_fragment_program(ctx)
+ || (ctx->Light.Enabled &&
+ ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR)
+ || ctx->Fog.ColorSumEnabled
+ || swrast->_FogEnabled) {
+ swrast->Line = aa_general_rgba_line;
}
else {
- /* Color Index */
- swrast->Line = aa_ci_line;
+ swrast->Line = aa_rgba_line;
}
}
-
projects / mesa.git / blobdiff