diff options
Diffstat (limited to 'src/gallium/drivers/softpipe/sp_tex_sample.c')
| -rw-r--r-- | src/gallium/drivers/softpipe/sp_tex_sample.c | 63 |
1 files changed, 48 insertions, 15 deletions
diff --git a/src/gallium/drivers/softpipe/sp_tex_sample.c b/src/gallium/drivers/softpipe/sp_tex_sample.c index ecd6b39863c..ef7ccf41898 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]) @@ -456,7 +451,7 @@ 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, @@ -464,14 +459,27 @@ wrap_nearest_unorm_clamp_to_border(const float s[4], unsigned size, { 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++) { icoord[ch]= util_ifloor( CLAMP(s[ch], 0.5F, (float) size - 0.5F) ); } } /** - * 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; @@ -1711,6 +1742,7 @@ 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: @@ -1754,6 +1786,7 @@ 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: |