From e4f976b8b9d74a74b5816146cb11880c3a493929 Mon Sep 17 00:00:00 2001 From: Brian Date: Fri, 2 Feb 2007 11:19:43 -0700 Subject: [PATCH] simplify interpolate_texcoords() --- src/mesa/swrast/s_span.c | 388 +++++++++++++-------------------------- 1 file changed, 126 insertions(+), 262 deletions(-) diff --git a/src/mesa/swrast/s_span.c b/src/mesa/swrast/s_span.c index ddc63594f28..6fb59986272 100644 --- a/src/mesa/swrast/s_span.c +++ b/src/mesa/swrast/s_span.c @@ -75,7 +75,8 @@ _swrast_span_default_z( GLcontext *ctx, SWspan *span ) void _swrast_span_default_fog( GLcontext *ctx, SWspan *span ) { - span->attrStart[FRAG_ATTRIB_FOGC][0] = _swrast_z_to_fogfactor(ctx, ctx->Current.RasterDistance); + span->attrStart[FRAG_ATTRIB_FOGC][0] + = _swrast_z_to_fogfactor(ctx, ctx->Current.RasterDistance); span->attrStepX[FRAG_ATTRIB_FOGC][0] = 0.0; span->attrStepY[FRAG_ATTRIB_FOGC][0] = 0.0; span->interpMask |= SPAN_FOG; @@ -540,284 +541,147 @@ _swrast_compute_lambda(GLfloat dsdx, GLfloat dsdy, GLfloat dtdx, GLfloat dtdy, static void interpolate_texcoords(GLcontext *ctx, SWspan *span) { + const GLuint maxUnit + = (ctx->Texture._EnabledCoordUnits > 1) ? ctx->Const.MaxTextureUnits : 1; + GLuint u; + ASSERT(span->interpMask & SPAN_TEXTURE); ASSERT(!(span->arrayMask & SPAN_TEXTURE)); - if (ctx->Texture._EnabledCoordUnits > 1) { - /* multitexture */ - GLuint u; - span->arrayMask |= SPAN_TEXTURE; - /* XXX CoordUnits vs. ImageUnits */ - for (u = 0; u < ctx->Const.MaxTextureUnits; u++) { - if (ctx->Texture._EnabledCoordUnits & (1 << u)) { - const GLuint attr = FRAG_ATTRIB_TEX0 + u; - const struct gl_texture_object *obj =ctx->Texture.Unit[u]._Current; - GLfloat texW, texH; - GLboolean needLambda; - if (obj) { - const struct gl_texture_image *img = obj->Image[0][obj->BaseLevel]; - needLambda = (obj->MinFilter != obj->MagFilter) - || ctx->FragmentProgram._Current; - texW = img->WidthScale; - texH = img->HeightScale; - } - else { - /* using a fragment program */ - texW = 1.0; - texH = 1.0; - needLambda = GL_FALSE; - } - if (needLambda) { - GLfloat (*texcoord)[4] = span->array->attribs[FRAG_ATTRIB_TEX0 + u]; - GLfloat *lambda = span->array->lambda[u]; - const GLfloat dsdx = span->attrStepX[attr][0]; - const GLfloat dsdy = span->attrStepY[attr][0]; - const GLfloat dtdx = span->attrStepX[attr][1]; - const GLfloat dtdy = span->attrStepY[attr][1]; - const GLfloat drdx = span->attrStepX[attr][2]; - const GLfloat dqdx = span->attrStepX[attr][3]; - const GLfloat dqdy = span->attrStepY[attr][3]; - GLfloat s = span->attrStart[attr][0]; - GLfloat t = span->attrStart[attr][1]; - GLfloat r = span->attrStart[attr][2]; - GLfloat q = span->attrStart[attr][3]; - GLuint i; - if (ctx->FragmentProgram._Current - || ctx->ATIFragmentShader._Enabled) { - /* do perspective correction but don't divide s, t, r by q */ - const GLfloat dwdx = span->attrStepX[FRAG_ATTRIB_WPOS][3]; - GLfloat w = span->attrStart[FRAG_ATTRIB_WPOS][3]; - for (i = 0; i < span->end; i++) { - const GLfloat invW = 1.0F / w; - texcoord[i][0] = s * invW; - texcoord[i][1] = t * invW; - texcoord[i][2] = r * invW; - texcoord[i][3] = q * invW; - lambda[i] = _swrast_compute_lambda(dsdx, dsdy, dtdx, dtdy, - dqdx, dqdy, texW, texH, - s, t, q, invW); - s += dsdx; - t += dtdx; - r += drdx; - q += dqdx; - w += dwdx; - } - } - else { - for (i = 0; i < span->end; i++) { - const GLfloat invQ = (q == 0.0F) ? 1.0F : (1.0F / q); - texcoord[i][0] = s * invQ; - texcoord[i][1] = t * invQ; - texcoord[i][2] = r * invQ; - texcoord[i][3] = q; - lambda[i] = _swrast_compute_lambda(dsdx, dsdy, dtdx, dtdy, - dqdx, dqdy, texW, texH, - s, t, q, invQ); - s += dsdx; - t += dtdx; - r += drdx; - q += dqdx; - } + span->arrayMask |= SPAN_TEXTURE; + + /* XXX CoordUnits vs. ImageUnits */ + for (u = 0; u < maxUnit; u++) { + if (ctx->Texture._EnabledCoordUnits & (1 << u)) { + const GLuint attr = FRAG_ATTRIB_TEX0 + u; + const struct gl_texture_object *obj =ctx->Texture.Unit[u]._Current; + GLfloat texW, texH; + GLboolean needLambda; + GLfloat (*texcoord)[4] = span->array->attribs[attr]; + GLfloat *lambda = span->array->lambda[u]; + const GLfloat dsdx = span->attrStepX[attr][0]; + const GLfloat dsdy = span->attrStepY[attr][0]; + const GLfloat dtdx = span->attrStepX[attr][1]; + const GLfloat dtdy = span->attrStepY[attr][1]; + const GLfloat drdx = span->attrStepX[attr][2]; + const GLfloat dqdx = span->attrStepX[attr][3]; + const GLfloat dqdy = span->attrStepY[attr][3]; + GLfloat s = span->attrStart[attr][0]; + GLfloat t = span->attrStart[attr][1]; + GLfloat r = span->attrStart[attr][2]; + GLfloat q = span->attrStart[attr][3]; + + if (obj) { + const struct gl_texture_image *img = obj->Image[0][obj->BaseLevel]; + needLambda = (obj->MinFilter != obj->MagFilter) + || ctx->FragmentProgram._Current; + texW = img->WidthScale; + texH = img->HeightScale; + } + else { + /* using a fragment program */ + texW = 1.0; + texH = 1.0; + needLambda = GL_FALSE; + } + + if (needLambda) { + GLuint i; + if (ctx->FragmentProgram._Current + || ctx->ATIFragmentShader._Enabled) { + /* do perspective correction but don't divide s, t, r by q */ + const GLfloat dwdx = span->attrStepX[FRAG_ATTRIB_WPOS][3]; + GLfloat w = span->attrStart[FRAG_ATTRIB_WPOS][3]; + for (i = 0; i < span->end; i++) { + const GLfloat invW = 1.0F / w; + texcoord[i][0] = s * invW; + texcoord[i][1] = t * invW; + texcoord[i][2] = r * invW; + texcoord[i][3] = q * invW; + lambda[i] = _swrast_compute_lambda(dsdx, dsdy, dtdx, dtdy, + dqdx, dqdy, texW, texH, + s, t, q, invW); + s += dsdx; + t += dtdx; + r += drdx; + q += dqdx; + w += dwdx; } - span->arrayMask |= SPAN_LAMBDA; } else { - GLfloat (*texcoord)[4] = span->array->attribs[FRAG_ATTRIB_TEX0 + u]; - GLfloat *lambda = span->array->lambda[u]; - const GLfloat dsdx = span->attrStepX[attr][0]; - const GLfloat dtdx = span->attrStepX[attr][1]; - const GLfloat drdx = span->attrStepX[attr][2]; - const GLfloat dqdx = span->attrStepX[attr][3]; - GLfloat s = span->attrStart[attr][0]; - GLfloat t = span->attrStart[attr][1]; - GLfloat r = span->attrStart[attr][2]; - GLfloat q = span->attrStart[attr][3]; - GLuint i; - if (ctx->FragmentProgram._Current || - ctx->ATIFragmentShader._Enabled) { - /* do perspective correction but don't divide s, t, r by q */ - const GLfloat dwdx = span->attrStepX[FRAG_ATTRIB_WPOS][3]; - GLfloat w = span->attrStart[FRAG_ATTRIB_WPOS][3]; - for (i = 0; i < span->end; i++) { - const GLfloat invW = 1.0F / w; - texcoord[i][0] = s * invW; - texcoord[i][1] = t * invW; - texcoord[i][2] = r * invW; - texcoord[i][3] = q * invW; - lambda[i] = 0.0; - s += dsdx; - t += dtdx; - r += drdx; - q += dqdx; - w += dwdx; - } - } - else if (dqdx == 0.0F) { - /* Ortho projection or polygon's parallel to window X axis */ + for (i = 0; i < span->end; i++) { const GLfloat invQ = (q == 0.0F) ? 1.0F : (1.0F / q); - for (i = 0; i < span->end; i++) { - texcoord[i][0] = s * invQ; - texcoord[i][1] = t * invQ; - texcoord[i][2] = r * invQ; - texcoord[i][3] = q; - lambda[i] = 0.0; - s += dsdx; - t += dtdx; - r += drdx; - } - } - else { - for (i = 0; i < span->end; i++) { - const GLfloat invQ = (q == 0.0F) ? 1.0F : (1.0F / q); - texcoord[i][0] = s * invQ; - texcoord[i][1] = t * invQ; - texcoord[i][2] = r * invQ; - texcoord[i][3] = q; - lambda[i] = 0.0; - s += dsdx; - t += dtdx; - r += drdx; - q += dqdx; - } + texcoord[i][0] = s * invQ; + texcoord[i][1] = t * invQ; + texcoord[i][2] = r * invQ; + texcoord[i][3] = q; + lambda[i] = _swrast_compute_lambda(dsdx, dsdy, dtdx, dtdy, + dqdx, dqdy, texW, texH, + s, t, q, invQ); + s += dsdx; + t += dtdx; + r += drdx; + q += dqdx; } - } /* lambda */ - } /* if */ - } /* for */ - } - else { - /* single texture */ - const struct gl_texture_object *obj = ctx->Texture.Unit[0]._Current; - GLfloat texW, texH; - GLboolean needLambda; - if (obj) { - const struct gl_texture_image *img = obj->Image[0][obj->BaseLevel]; - needLambda = (obj->MinFilter != obj->MagFilter) - || ctx->FragmentProgram._Current; - texW = (GLfloat) img->WidthScale; - texH = (GLfloat) img->HeightScale; - } - else { - needLambda = GL_FALSE; - texW = texH = 1.0; - } - span->arrayMask |= SPAN_TEXTURE; - if (needLambda) { - /* just texture unit 0, with lambda */ - GLfloat (*texcoord)[4] = span->array->attribs[FRAG_ATTRIB_TEX0]; - GLfloat *lambda = span->array->lambda[0]; - const GLfloat dsdx = span->attrStepX[FRAG_ATTRIB_TEX0][0]; - const GLfloat dsdy = span->attrStepY[FRAG_ATTRIB_TEX0][0]; - const GLfloat dtdx = span->attrStepX[FRAG_ATTRIB_TEX0][1]; - const GLfloat dtdy = span->attrStepY[FRAG_ATTRIB_TEX0][1]; - const GLfloat drdx = span->attrStepX[FRAG_ATTRIB_TEX0][2]; - const GLfloat dqdx = span->attrStepX[FRAG_ATTRIB_TEX0][3]; - const GLfloat dqdy = span->attrStepY[FRAG_ATTRIB_TEX0][3]; - GLfloat s = span->attrStart[FRAG_ATTRIB_TEX0][0]; - GLfloat t = span->attrStart[FRAG_ATTRIB_TEX0][1]; - GLfloat r = span->attrStart[FRAG_ATTRIB_TEX0][2]; - GLfloat q = span->attrStart[FRAG_ATTRIB_TEX0][3]; - GLuint i; - if (ctx->FragmentProgram._Current - || ctx->ATIFragmentShader._Enabled) { - /* do perspective correction but don't divide s, t, r by q */ - const GLfloat dwdx = span->attrStepX[FRAG_ATTRIB_WPOS][3]; - GLfloat w = span->attrStart[FRAG_ATTRIB_WPOS][3]; - for (i = 0; i < span->end; i++) { - const GLfloat invW = 1.0F / w; - texcoord[i][0] = s * invW; - texcoord[i][1] = t * invW; - texcoord[i][2] = r * invW; - texcoord[i][3] = q * invW; - lambda[i] = _swrast_compute_lambda(dsdx, dsdy, dtdx, dtdy, - dqdx, dqdy, texW, texH, - s, t, q, invW); - s += dsdx; - t += dtdx; - r += drdx; - q += dqdx; - w += dwdx; } + span->arrayMask |= SPAN_LAMBDA; } else { - /* tex.c */ - for (i = 0; i < span->end; i++) { - const GLfloat invQ = (q == 0.0F) ? 1.0F : (1.0F / q); - lambda[i] = _swrast_compute_lambda(dsdx, dsdy, dtdx, dtdy, - dqdx, dqdy, texW, texH, - s, t, q, invQ); - texcoord[i][0] = s * invQ; - texcoord[i][1] = t * invQ; - texcoord[i][2] = r * invQ; - texcoord[i][3] = q; - s += dsdx; - t += dtdx; - r += drdx; - q += dqdx; - } - } - span->arrayMask |= SPAN_LAMBDA; - } - else { - /* just texture 0, without lambda */ - GLfloat (*texcoord)[4] = span->array->attribs[FRAG_ATTRIB_TEX0]; - const GLfloat dsdx = span->attrStepX[FRAG_ATTRIB_TEX0][0]; - const GLfloat dtdx = span->attrStepX[FRAG_ATTRIB_TEX0][1]; - const GLfloat drdx = span->attrStepX[FRAG_ATTRIB_TEX0][2]; - const GLfloat dqdx = span->attrStepX[FRAG_ATTRIB_TEX0][3]; - GLfloat s = span->attrStart[FRAG_ATTRIB_TEX0][0]; - GLfloat t = span->attrStart[FRAG_ATTRIB_TEX0][1]; - GLfloat r = span->attrStart[FRAG_ATTRIB_TEX0][2]; - GLfloat q = span->attrStart[FRAG_ATTRIB_TEX0][3]; - GLuint i; - if (ctx->FragmentProgram._Current - || ctx->ATIFragmentShader._Enabled) { - /* do perspective correction but don't divide s, t, r by q */ - const GLfloat dwdx = span->attrStepX[FRAG_ATTRIB_WPOS][3]; - GLfloat w = span->attrStart[FRAG_ATTRIB_WPOS][3]; - for (i = 0; i < span->end; i++) { - const GLfloat invW = 1.0F / w; - texcoord[i][0] = s * invW; - texcoord[i][1] = t * invW; - texcoord[i][2] = r * invW; - texcoord[i][3] = q * invW; - s += dsdx; - t += dtdx; - r += drdx; - q += dqdx; - w += dwdx; - } - } - else if (dqdx == 0.0F) { - /* Ortho projection or polygon's parallel to window X axis */ - const GLfloat invQ = (q == 0.0F) ? 1.0F : (1.0F / q); - for (i = 0; i < span->end; i++) { - texcoord[i][0] = s * invQ; - texcoord[i][1] = t * invQ; - texcoord[i][2] = r * invQ; - texcoord[i][3] = q; - s += dsdx; - t += dtdx; - r += drdx; + GLuint i; + if (ctx->FragmentProgram._Current || + ctx->ATIFragmentShader._Enabled) { + /* do perspective correction but don't divide s, t, r by q */ + const GLfloat dwdx = span->attrStepX[FRAG_ATTRIB_WPOS][3]; + GLfloat w = span->attrStart[FRAG_ATTRIB_WPOS][3]; + for (i = 0; i < span->end; i++) { + const GLfloat invW = 1.0F / w; + texcoord[i][0] = s * invW; + texcoord[i][1] = t * invW; + texcoord[i][2] = r * invW; + texcoord[i][3] = q * invW; + lambda[i] = 0.0; + s += dsdx; + t += dtdx; + r += drdx; + q += dqdx; + w += dwdx; + } } - } - else { - for (i = 0; i < span->end; i++) { + else if (dqdx == 0.0F) { + /* Ortho projection or polygon's parallel to window X axis */ const GLfloat invQ = (q == 0.0F) ? 1.0F : (1.0F / q); - texcoord[i][0] = s * invQ; - texcoord[i][1] = t * invQ; - texcoord[i][2] = r * invQ; - texcoord[i][3] = q; - s += dsdx; - t += dtdx; - r += drdx; - q += dqdx; + for (i = 0; i < span->end; i++) { + texcoord[i][0] = s * invQ; + texcoord[i][1] = t * invQ; + texcoord[i][2] = r * invQ; + texcoord[i][3] = q; + lambda[i] = 0.0; + s += dsdx; + t += dtdx; + r += drdx; + } } - } - } - } + else { + for (i = 0; i < span->end; i++) { + const GLfloat invQ = (q == 0.0F) ? 1.0F : (1.0F / q); + texcoord[i][0] = s * invQ; + texcoord[i][1] = t * invQ; + texcoord[i][2] = r * invQ; + texcoord[i][3] = q; + lambda[i] = 0.0; + s += dsdx; + t += dtdx; + r += drdx; + q += dqdx; + } + } + } /* lambda */ + } /* if */ + } /* for */ } + /** * Fill in the arrays->attribs[FRAG_ATTRIB_VARx] arrays from the * interpolation values. -- 2.30.2