X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fgallium%2Fdrivers%2Fsoftpipe%2Fsp_tex_sample.c;h=fa9e19b282be189c3fda02bede22efe5540e04fb;hb=f0f04cd12db156ec53b7ea46fae27199af121f90;hp=1ae8fecacf7706c46bf80d732d0c440d7a887f1a;hpb=43867acb6afc7fad26cdc2f22b2a3bb6eeefb2da;p=mesa.git diff --git a/src/gallium/drivers/softpipe/sp_tex_sample.c b/src/gallium/drivers/softpipe/sp_tex_sample.c index 1ae8fecacf7..fa9e19b282b 100644 --- a/src/gallium/drivers/softpipe/sp_tex_sample.c +++ b/src/gallium/drivers/softpipe/sp_tex_sample.c @@ -55,7 +55,7 @@ static INLINE float frac(float f) { - return f - util_ifloor(f); + return f - floorf(f); } @@ -201,11 +201,9 @@ wrap_nearest_mirror_repeat(const float s[4], unsigned size, int icoord[4]) const float max = 1.0F - min; for (ch = 0; ch < 4; ch++) { const int flr = util_ifloor(s[ch]); - float u; + float u = frac(s[ch]); if (flr & 1) - u = 1.0F - (s[ch] - (float) flr); - else - u = s[ch] - (float) flr; + u = 1.0F - u; if (u < min) icoord[ch] = 0; else if (u > max) @@ -358,11 +356,9 @@ wrap_linear_mirror_repeat(const float s[4], unsigned size, uint ch; for (ch = 0; ch < 4; ch++) { const int flr = util_ifloor(s[ch]); - float u; + float u = frac(s[ch]); if (flr & 1) - u = 1.0F - (s[ch] - (float) flr); - else - u = s[ch] - (float) flr; + u = 1.0F - u; u = u * size - 0.5F; icoord0[ch] = util_ifloor(u); icoord1[ch] = icoord0[ch] + 1; @@ -441,8 +437,7 @@ wrap_linear_mirror_clamp_to_border(const float s[4], unsigned size, /** - * For RECT textures / unnormalized texcoords - * Only a subset of wrap modes supported. + * PIPE_TEX_WRAP_CLAMP for nearest sampling, unnormalized coords. */ static void wrap_nearest_unorm_clamp(const float s[4], unsigned size, int icoord[4]) @@ -456,11 +451,25 @@ wrap_nearest_unorm_clamp(const float s[4], unsigned size, int icoord[4]) /** - * Handles clamp_to_edge and clamp_to_border: + * PIPE_TEX_WRAP_CLAMP_TO_BORDER for nearest sampling, unnormalized coords. */ static void wrap_nearest_unorm_clamp_to_border(const float s[4], unsigned size, int icoord[4]) +{ + uint ch; + for (ch = 0; ch < 4; ch++) { + icoord[ch]= util_ifloor( CLAMP(s[ch], -0.5F, (float) size + 0.5F) ); + } +} + + +/** + * PIPE_TEX_WRAP_CLAMP_TO_EDGE for nearest sampling, unnormalized coords. + */ +static void +wrap_nearest_unorm_clamp_to_edge(const float s[4], unsigned size, + int icoord[4]) { uint ch; for (ch = 0; ch < 4; ch++) { @@ -470,8 +479,7 @@ wrap_nearest_unorm_clamp_to_border(const float s[4], unsigned size, /** - * For RECT textures / unnormalized texcoords. - * Only a subset of wrap modes supported. + * PIPE_TEX_WRAP_CLAMP for linear sampling, unnormalized coords. */ static void wrap_linear_unorm_clamp(const float s[4], unsigned size, @@ -488,13 +496,36 @@ wrap_linear_unorm_clamp(const float s[4], unsigned size, } +/** + * PIPE_TEX_WRAP_CLAMP_TO_BORDER for linear sampling, unnormalized coords. + */ static void wrap_linear_unorm_clamp_to_border(const float s[4], unsigned size, int icoord0[4], int icoord1[4], float w[4]) { uint ch; for (ch = 0; ch < 4; ch++) { - float u = CLAMP(s[ch], 0.5F, (float) size - 0.5F); + float u = CLAMP(s[ch], -0.5F, (float) size + 0.5F); + u -= 0.5F; + icoord0[ch] = util_ifloor(u); + icoord1[ch] = icoord0[ch] + 1; + if (icoord1[ch] > (int) size - 1) + icoord1[ch] = size - 1; + w[ch] = frac(u); + } +} + + +/** + * PIPE_TEX_WRAP_CLAMP_TO_EDGE for linear sampling, unnormalized coords. + */ +static void +wrap_linear_unorm_clamp_to_edge(const float s[4], unsigned size, + int icoord0[4], int icoord1[4], float w[4]) +{ + uint ch; + for (ch = 0; ch < 4; ch++) { + float u = CLAMP(s[ch], +0.5F, (float) size - 0.5F); u -= 0.5F; icoord0[ch] = util_ifloor(u); icoord1[ch] = icoord0[ch] + 1; @@ -517,7 +548,6 @@ compute_lambda_1d(const struct sp_sampler_varient *samp, const float p[QUAD_SIZE]) { const struct pipe_texture *texture = samp->texture; - const struct pipe_sampler_state *sampler = samp->sampler; float dsdx = fabsf(s[QUAD_BOTTOM_RIGHT] - s[QUAD_BOTTOM_LEFT]); float dsdy = fabsf(s[QUAD_TOP_LEFT] - s[QUAD_BOTTOM_LEFT]); float rho = MAX2(dsdx, dsdy) * texture->width0; @@ -533,7 +563,6 @@ compute_lambda_2d(const struct sp_sampler_varient *samp, const float p[QUAD_SIZE]) { const struct pipe_texture *texture = samp->texture; - const struct pipe_sampler_state *sampler = samp->sampler; float dsdx = fabsf(s[QUAD_BOTTOM_RIGHT] - s[QUAD_BOTTOM_LEFT]); float dsdy = fabsf(s[QUAD_TOP_LEFT] - s[QUAD_BOTTOM_LEFT]); float dtdx = fabsf(t[QUAD_BOTTOM_RIGHT] - t[QUAD_BOTTOM_LEFT]); @@ -553,7 +582,6 @@ compute_lambda_3d(const struct sp_sampler_varient *samp, const float p[QUAD_SIZE]) { const struct pipe_texture *texture = samp->texture; - const struct pipe_sampler_state *sampler = samp->sampler; float dsdx = fabsf(s[QUAD_BOTTOM_RIGHT] - s[QUAD_BOTTOM_LEFT]); float dsdy = fabsf(s[QUAD_TOP_LEFT] - s[QUAD_BOTTOM_LEFT]); float dtdx = fabsf(t[QUAD_BOTTOM_RIGHT] - t[QUAD_BOTTOM_LEFT]); @@ -1330,6 +1358,11 @@ mip_filter_linear(struct tgsi_sampler *tgsi_sampler, } +/** + * Compute nearest mipmap level from texcoords. + * Then sample the texture level for four elements of a quad. + * \param c0 the LOD bias factors, or absolute LODs (depending on control) + */ static void mip_filter_nearest(struct tgsi_sampler *tgsi_sampler, const float s[QUAD_SIZE], @@ -1566,8 +1599,8 @@ sample_compare(struct tgsi_sampler *tgsi_sampler, /** - * Compute which cube face is referenced by each texcoord and put that - * info into the sampler faces[] array. Then sample the cube faces + * Use 3D texcoords to choose a cube face, then sample the 2D cube faces. + * Put face info into the sampler faces[] array. */ static void sample_cube(struct tgsi_sampler *tgsi_sampler, @@ -1584,8 +1617,8 @@ sample_cube(struct tgsi_sampler *tgsi_sampler, /* major axis - direction target sc tc ma - ---------- ------------------------------- --- --- --- + direction target sc tc ma + ---------- ------------------------------- --- --- --- +rx TEXTURE_CUBE_MAP_POSITIVE_X_EXT -rz -ry rx -rx TEXTURE_CUBE_MAP_NEGATIVE_X_EXT +rz -ry rx +ry TEXTURE_CUBE_MAP_POSITIVE_Y_EXT +rx +rz ry @@ -1593,63 +1626,56 @@ sample_cube(struct tgsi_sampler *tgsi_sampler, +rz TEXTURE_CUBE_MAP_POSITIVE_Z_EXT +rx -ry rz -rz TEXTURE_CUBE_MAP_NEGATIVE_Z_EXT -rx -ry rz */ - for (j = 0; j < QUAD_SIZE; j++) { - float rx = s[j]; - float ry = t[j]; - float rz = p[j]; + + /* Choose the cube face and compute new s/t coords for the 2D face. + * + * Use the same cube face for all four pixels in the quad. + * + * This isn't ideal, but if we want to use a different cube face + * per pixel in the quad, we'd have to also compute the per-face + * LOD here too. That's because the four post-face-selection + * texcoords are no longer related to each other (they're + * per-face!) so we can't use subtraction to compute the partial + * deriviates to compute the LOD. Doing so (near cube edges + * anyway) gives us pretty much random values. + */ + { + /* use the average of the four pixel's texcoords to choose the face */ + const float rx = 0.25 * (s[0] + s[1] + s[2] + s[3]); + const float ry = 0.25 * (t[0] + t[1] + t[2] + t[3]); + const float rz = 0.25 * (p[0] + p[1] + p[2] + p[3]); const float arx = fabsf(rx), ary = fabsf(ry), arz = fabsf(rz); - unsigned face; - float sc, tc, ma; if (arx >= ary && arx >= arz) { - if (rx >= 0.0F) { - face = PIPE_TEX_FACE_POS_X; - sc = -rz; - tc = -ry; - ma = arx; - } - else { - face = PIPE_TEX_FACE_NEG_X; - sc = rz; - tc = -ry; - ma = arx; + float sign = (rx >= 0.0F) ? 1.0F : -1.0F; + uint face = (rx >= 0.0F) ? PIPE_TEX_FACE_POS_X : PIPE_TEX_FACE_NEG_X; + for (j = 0; j < QUAD_SIZE; j++) { + const float ima = -0.5F / fabsf(s[j]); + ssss[j] = sign * p[j] * ima + 0.5F; + tttt[j] = t[j] * ima + 0.5F; + samp->faces[j] = face; } } else if (ary >= arx && ary >= arz) { - if (ry >= 0.0F) { - face = PIPE_TEX_FACE_POS_Y; - sc = rx; - tc = rz; - ma = ary; - } - else { - face = PIPE_TEX_FACE_NEG_Y; - sc = rx; - tc = -rz; - ma = ary; + float sign = (ry >= 0.0F) ? 1.0F : -1.0F; + uint face = (ry >= 0.0F) ? PIPE_TEX_FACE_POS_Y : PIPE_TEX_FACE_NEG_Y; + for (j = 0; j < QUAD_SIZE; j++) { + const float ima = -0.5F / fabsf(t[j]); + ssss[j] = -s[j] * ima + 0.5F; + tttt[j] = sign * -p[j] * ima + 0.5F; + samp->faces[j] = face; } } else { - if (rz > 0.0F) { - face = PIPE_TEX_FACE_POS_Z; - sc = rx; - tc = -ry; - ma = arz; - } - else { - face = PIPE_TEX_FACE_NEG_Z; - sc = -rx; - tc = -ry; - ma = arz; + float sign = (rz >= 0.0F) ? 1.0F : -1.0F; + uint face = (rz >= 0.0F) ? PIPE_TEX_FACE_POS_Z : PIPE_TEX_FACE_NEG_Z; + for (j = 0; j < QUAD_SIZE; j++) { + const float ima = -0.5 / fabsf(p[j]); + ssss[j] = sign * -s[j] * ima + 0.5F; + tttt[j] = t[j] * ima + 0.5F; + samp->faces[j] = face; } } - - { - const float ima = 1.0 / ma; - ssss[j] = ( sc * ima + 1.0F ) * 0.5F; - tttt[j] = ( tc * ima + 1.0F ) * 0.5F; - samp->faces[j] = face; - } } /* In our little pipeline, the compare stage is next. If compare @@ -1668,6 +1694,7 @@ get_nearest_unorm_wrap(unsigned mode) case PIPE_TEX_WRAP_CLAMP: return wrap_nearest_unorm_clamp; case PIPE_TEX_WRAP_CLAMP_TO_EDGE: + return wrap_nearest_unorm_clamp_to_edge; case PIPE_TEX_WRAP_CLAMP_TO_BORDER: return wrap_nearest_unorm_clamp_to_border; default: @@ -1711,6 +1738,7 @@ get_linear_unorm_wrap(unsigned mode) case PIPE_TEX_WRAP_CLAMP: return wrap_linear_unorm_clamp; case PIPE_TEX_WRAP_CLAMP_TO_EDGE: + return wrap_linear_unorm_clamp_to_edge; case PIPE_TEX_WRAP_CLAMP_TO_BORDER: return wrap_linear_unorm_clamp_to_border; default: