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=b3a79732b468883fed012bd9a0bbae094e94d3ec;hpb=6ba31fb2dbe6a90e6d60a49b3e5bd2edce05241d;p=mesa.git diff --git a/src/gallium/drivers/softpipe/sp_tex_sample.c b/src/gallium/drivers/softpipe/sp_tex_sample.c index b3a79732b46..fa9e19b282b 100644 --- a/src/gallium/drivers/softpipe/sp_tex_sample.c +++ b/src/gallium/drivers/softpipe/sp_tex_sample.c @@ -437,8 +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]) @@ -452,11 +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++) { @@ -466,8 +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, @@ -484,13 +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; @@ -1579,7 +1614,6 @@ sample_cube(struct tgsi_sampler *tgsi_sampler, struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler); unsigned j; float ssss[4], tttt[4]; - unsigned face; /* major axis @@ -1593,7 +1627,8 @@ sample_cube(struct tgsi_sampler *tgsi_sampler, -rz TEXTURE_CUBE_MAP_NEGATIVE_Z_EXT -rx -ry rz */ - /* First choose the cube face. + /* 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 @@ -1612,82 +1647,34 @@ sample_cube(struct tgsi_sampler *tgsi_sampler, const float arx = fabsf(rx), ary = fabsf(ry), arz = fabsf(rz); if (arx >= ary && arx >= arz) { - if (rx >= 0.0F) { - face = PIPE_TEX_FACE_POS_X; - } - else { - face = PIPE_TEX_FACE_NEG_X; + 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; - } - else { - face = PIPE_TEX_FACE_NEG_Y; + 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; + 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; } - else { - face = PIPE_TEX_FACE_NEG_Z; - } - } - } - - /* Now compute the 2D _face_ texture coords from the - * 3D _cube_ texture coords. - */ - for (j = 0; j < QUAD_SIZE; j++) { - const float rx = s[j], ry = t[j], rz = p[j]; - const float arx = fabsf(rx), ary = fabsf(ry), arz = fabsf(rz); - float sc, tc, ma; - - switch (face) { - case PIPE_TEX_FACE_POS_X: - sc = -rz; - tc = -ry; - ma = arx; - break; - case PIPE_TEX_FACE_NEG_X: - sc = rz; - tc = -ry; - ma = arx; - break; - case PIPE_TEX_FACE_POS_Y: - sc = rx; - tc = rz; - ma = ary; - break; - case PIPE_TEX_FACE_NEG_Y: - sc = rx; - tc = -rz; - ma = ary; - break; - case PIPE_TEX_FACE_POS_Z: - sc = rx; - tc = -ry; - ma = arz; - break; - case PIPE_TEX_FACE_NEG_Z: - sc = -rx; - tc = -ry; - ma = arz; - break; - default: - assert(0 && "bad cube face"); - sc = 0.0F; - tc = 0.0F; - ma = 0.0F; - } - - { - 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; } } @@ -1707,6 +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: @@ -1750,6 +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: