| /************************************************************************** |
| * |
| * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. |
| * All Rights Reserved. |
| * Copyright 2008 VMware, Inc. 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"), to deal in the Software without restriction, including |
| * without limitation the rights to use, copy, modify, merge, publish, |
| * distribute, sub license, and/or sell copies of the Software, and to |
| * permit persons to whom the Software is furnished to do so, subject to |
| * the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the |
| * next paragraph) shall be included in all copies or substantial portions |
| * of 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 NON-INFRINGEMENT. |
| * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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. |
| * |
| **************************************************************************/ |
| |
| /** |
| * Texture sampling |
| * |
| * Authors: |
| * Brian Paul |
| * Keith Whitwell |
| */ |
| |
| #include "pipe/p_context.h" |
| #include "pipe/p_defines.h" |
| #include "pipe/p_shader_tokens.h" |
| #include "util/u_math.h" |
| #include "util/u_memory.h" |
| #include "sp_quad.h" /* only for #define QUAD_* tokens */ |
| #include "sp_tex_sample.h" |
| #include "sp_tex_tile_cache.h" |
| |
| |
| |
| /* |
| * Return fractional part of 'f'. Used for computing interpolation weights. |
| * Need to be careful with negative values. |
| * Note, if this function isn't perfect you'll sometimes see 1-pixel bands |
| * of improperly weighted linear-filtered textures. |
| * The tests/texwrap.c demo is a good test. |
| */ |
| static INLINE float |
| frac(float f) |
| { |
| return f - util_ifloor(f); |
| } |
| |
| |
| |
| /** |
| * Linear interpolation macro |
| */ |
| static INLINE float |
| lerp(float a, float v0, float v1) |
| { |
| return v0 + a * (v1 - v0); |
| } |
| |
| |
| /** |
| * Do 2D/biliner interpolation of float values. |
| * v00, v10, v01 and v11 are typically four texture samples in a square/box. |
| * a and b are the horizontal and vertical interpolants. |
| * It's important that this function is inlined when compiled with |
| * optimization! If we find that's not true on some systems, convert |
| * to a macro. |
| */ |
| static INLINE float |
| lerp_2d(float a, float b, |
| float v00, float v10, float v01, float v11) |
| { |
| const float temp0 = lerp(a, v00, v10); |
| const float temp1 = lerp(a, v01, v11); |
| return lerp(b, temp0, temp1); |
| } |
| |
| |
| /** |
| * As above, but 3D interpolation of 8 values. |
| */ |
| static INLINE float |
| lerp_3d(float a, float b, float c, |
| float v000, float v100, float v010, float v110, |
| float v001, float v101, float v011, float v111) |
| { |
| const float temp0 = lerp_2d(a, b, v000, v100, v010, v110); |
| const float temp1 = lerp_2d(a, b, v001, v101, v011, v111); |
| return lerp(c, temp0, temp1); |
| } |
| |
| |
| |
| /** |
| * Compute coord % size for repeat wrap modes. |
| * Note that if coord is a signed integer, coord % size doesn't give |
| * the right value for coord < 0 (in terms of texture repeat). Just |
| * casting to unsigned fixes that. |
| */ |
| static INLINE int |
| repeat(int coord, unsigned size) |
| { |
| return (int) ((unsigned) coord % size); |
| } |
| |
| |
| /** |
| * Apply texture coord wrapping mode and return integer texture indexes |
| * for a vector of four texcoords (S or T or P). |
| * \param wrapMode PIPE_TEX_WRAP_x |
| * \param s the incoming texcoords |
| * \param size the texture image size |
| * \param icoord returns the integer texcoords |
| * \return integer texture index |
| */ |
| static void |
| wrap_nearest_repeat(const float s[4], unsigned size, int icoord[4]) |
| { |
| uint ch; |
| /* s limited to [0,1) */ |
| /* i limited to [0,size-1] */ |
| for (ch = 0; ch < 4; ch++) { |
| int i = util_ifloor(s[ch] * size); |
| icoord[ch] = repeat(i, size); |
| } |
| } |
| |
| |
| static void |
| wrap_nearest_clamp(const float s[4], unsigned size, int icoord[4]) |
| { |
| uint ch; |
| /* s limited to [0,1] */ |
| /* i limited to [0,size-1] */ |
| for (ch = 0; ch < 4; ch++) { |
| if (s[ch] <= 0.0F) |
| icoord[ch] = 0; |
| else if (s[ch] >= 1.0F) |
| icoord[ch] = size - 1; |
| else |
| icoord[ch] = util_ifloor(s[ch] * size); |
| } |
| } |
| |
| |
| static void |
| wrap_nearest_clamp_to_edge(const float s[4], unsigned size, int icoord[4]) |
| { |
| uint ch; |
| /* s limited to [min,max] */ |
| /* i limited to [0, size-1] */ |
| const float min = 1.0F / (2.0F * size); |
| const float max = 1.0F - min; |
| for (ch = 0; ch < 4; ch++) { |
| if (s[ch] < min) |
| icoord[ch] = 0; |
| else if (s[ch] > max) |
| icoord[ch] = size - 1; |
| else |
| icoord[ch] = util_ifloor(s[ch] * size); |
| } |
| } |
| |
| |
| static void |
| wrap_nearest_clamp_to_border(const float s[4], unsigned size, int icoord[4]) |
| { |
| uint ch; |
| /* s limited to [min,max] */ |
| /* i limited to [-1, size] */ |
| const float min = -1.0F / (2.0F * size); |
| const float max = 1.0F - min; |
| for (ch = 0; ch < 4; ch++) { |
| if (s[ch] <= min) |
| icoord[ch] = -1; |
| else if (s[ch] >= max) |
| icoord[ch] = size; |
| else |
| icoord[ch] = util_ifloor(s[ch] * size); |
| } |
| } |
| |
| |
| static void |
| wrap_nearest_mirror_repeat(const float s[4], unsigned size, int icoord[4]) |
| { |
| uint ch; |
| const float min = 1.0F / (2.0F * size); |
| const float max = 1.0F - min; |
| for (ch = 0; ch < 4; ch++) { |
| const int flr = util_ifloor(s[ch]); |
| float u; |
| if (flr & 1) |
| u = 1.0F - (s[ch] - (float) flr); |
| else |
| u = s[ch] - (float) flr; |
| if (u < min) |
| icoord[ch] = 0; |
| else if (u > max) |
| icoord[ch] = size - 1; |
| else |
| icoord[ch] = util_ifloor(u * size); |
| } |
| } |
| |
| |
| static void |
| wrap_nearest_mirror_clamp(const float s[4], unsigned size, int icoord[4]) |
| { |
| uint ch; |
| for (ch = 0; ch < 4; ch++) { |
| /* s limited to [0,1] */ |
| /* i limited to [0,size-1] */ |
| const float u = fabsf(s[ch]); |
| if (u <= 0.0F) |
| icoord[ch] = 0; |
| else if (u >= 1.0F) |
| icoord[ch] = size - 1; |
| else |
| icoord[ch] = util_ifloor(u * size); |
| } |
| } |
| |
| |
| static void |
| wrap_nearest_mirror_clamp_to_edge(const float s[4], unsigned size, |
| int icoord[4]) |
| { |
| uint ch; |
| /* s limited to [min,max] */ |
| /* i limited to [0, size-1] */ |
| const float min = 1.0F / (2.0F * size); |
| const float max = 1.0F - min; |
| for (ch = 0; ch < 4; ch++) { |
| const float u = fabsf(s[ch]); |
| if (u < min) |
| icoord[ch] = 0; |
| else if (u > max) |
| icoord[ch] = size - 1; |
| else |
| icoord[ch] = util_ifloor(u * size); |
| } |
| } |
| |
| |
| static void |
| wrap_nearest_mirror_clamp_to_border(const float s[4], unsigned size, |
| int icoord[4]) |
| { |
| uint ch; |
| /* s limited to [min,max] */ |
| /* i limited to [0, size-1] */ |
| const float min = -1.0F / (2.0F * size); |
| const float max = 1.0F - min; |
| for (ch = 0; ch < 4; ch++) { |
| const float u = fabsf(s[ch]); |
| if (u < min) |
| icoord[ch] = -1; |
| else if (u > max) |
| icoord[ch] = size; |
| else |
| icoord[ch] = util_ifloor(u * size); |
| } |
| } |
| |
| |
| /** |
| * Used to compute texel locations for linear sampling for four texcoords. |
| * \param wrapMode PIPE_TEX_WRAP_x |
| * \param s the texcoords |
| * \param size the texture image size |
| * \param icoord0 returns first texture indexes |
| * \param icoord1 returns second texture indexes (usually icoord0 + 1) |
| * \param w returns blend factor/weight between texture indexes |
| * \param icoord returns the computed integer texture coords |
| */ |
| static void |
| wrap_linear_repeat(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 = s[ch] * size - 0.5F; |
| icoord0[ch] = repeat(util_ifloor(u), size); |
| icoord1[ch] = repeat(icoord0[ch] + 1, size); |
| w[ch] = frac(u); |
| } |
| } |
| |
| |
| static void |
| wrap_linear_clamp(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], 0.0F, 1.0F); |
| u = u * size - 0.5f; |
| icoord0[ch] = util_ifloor(u); |
| icoord1[ch] = icoord0[ch] + 1; |
| w[ch] = frac(u); |
| } |
| } |
| |
| |
| static void |
| wrap_linear_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], 0.0F, 1.0F); |
| u = u * size - 0.5f; |
| icoord0[ch] = util_ifloor(u); |
| icoord1[ch] = icoord0[ch] + 1; |
| if (icoord0[ch] < 0) |
| icoord0[ch] = 0; |
| if (icoord1[ch] >= (int) size) |
| icoord1[ch] = size - 1; |
| w[ch] = frac(u); |
| } |
| } |
| |
| |
| static void |
| wrap_linear_clamp_to_border(const float s[4], unsigned size, |
| int icoord0[4], int icoord1[4], float w[4]) |
| { |
| const float min = -1.0F / (2.0F * size); |
| const float max = 1.0F - min; |
| uint ch; |
| for (ch = 0; ch < 4; ch++) { |
| float u = CLAMP(s[ch], min, max); |
| u = u * size - 0.5f; |
| icoord0[ch] = util_ifloor(u); |
| icoord1[ch] = icoord0[ch] + 1; |
| w[ch] = frac(u); |
| } |
| } |
| |
| |
| static void |
| wrap_linear_mirror_repeat(const float s[4], unsigned size, |
| int icoord0[4], int icoord1[4], float w[4]) |
| { |
| uint ch; |
| for (ch = 0; ch < 4; ch++) { |
| const int flr = util_ifloor(s[ch]); |
| float u; |
| if (flr & 1) |
| u = 1.0F - (s[ch] - (float) flr); |
| else |
| u = s[ch] - (float) flr; |
| u = u * size - 0.5F; |
| icoord0[ch] = util_ifloor(u); |
| icoord1[ch] = icoord0[ch] + 1; |
| if (icoord0[ch] < 0) |
| icoord0[ch] = 0; |
| if (icoord1[ch] >= (int) size) |
| icoord1[ch] = size - 1; |
| w[ch] = frac(u); |
| } |
| } |
| |
| |
| static void |
| wrap_linear_mirror_clamp(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 = fabsf(s[ch]); |
| if (u >= 1.0F) |
| u = (float) size; |
| else |
| u *= size; |
| u -= 0.5F; |
| icoord0[ch] = util_ifloor(u); |
| icoord1[ch] = icoord0[ch] + 1; |
| w[ch] = frac(u); |
| } |
| } |
| |
| |
| static void |
| wrap_linear_mirror_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 = fabsf(s[ch]); |
| if (u >= 1.0F) |
| u = (float) size; |
| else |
| u *= size; |
| u -= 0.5F; |
| icoord0[ch] = util_ifloor(u); |
| icoord1[ch] = icoord0[ch] + 1; |
| if (icoord0[ch] < 0) |
| icoord0[ch] = 0; |
| if (icoord1[ch] >= (int) size) |
| icoord1[ch] = size - 1; |
| w[ch] = frac(u); |
| } |
| } |
| |
| |
| static void |
| wrap_linear_mirror_clamp_to_border(const float s[4], unsigned size, |
| int icoord0[4], int icoord1[4], float w[4]) |
| { |
| const float min = -1.0F / (2.0F * size); |
| const float max = 1.0F - min; |
| uint ch; |
| for (ch = 0; ch < 4; ch++) { |
| float u = fabsf(s[ch]); |
| if (u <= min) |
| u = min * size; |
| else if (u >= max) |
| u = max * size; |
| else |
| u *= size; |
| u -= 0.5F; |
| icoord0[ch] = util_ifloor(u); |
| icoord1[ch] = icoord0[ch] + 1; |
| w[ch] = frac(u); |
| } |
| } |
| |
| |
| /** |
| * For RECT textures / unnormalized texcoords |
| * Only a subset of wrap modes supported. |
| */ |
| static void |
| wrap_nearest_unorm_clamp(const float s[4], unsigned size, int icoord[4]) |
| { |
| uint ch; |
| for (ch = 0; ch < 4; ch++) { |
| int i = util_ifloor(s[ch]); |
| icoord[ch]= CLAMP(i, 0, (int) size-1); |
| } |
| } |
| |
| |
| /** |
| * Handles clamp_to_edge and clamp_to_border: |
| */ |
| 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) ); |
| } |
| } |
| |
| |
| /** |
| * For RECT textures / unnormalized texcoords. |
| * Only a subset of wrap modes supported. |
| */ |
| static void |
| wrap_linear_unorm_clamp(const float s[4], unsigned size, |
| int icoord0[4], int icoord1[4], float w[4]) |
| { |
| uint ch; |
| for (ch = 0; ch < 4; ch++) { |
| /* Not exactly what the spec says, but it matches NVIDIA output */ |
| float u = CLAMP(s[ch] - 0.5F, 0.0f, (float) size - 1.0f); |
| icoord0[ch] = util_ifloor(u); |
| icoord1[ch] = icoord0[ch] + 1; |
| w[ch] = frac(u); |
| } |
| } |
| |
| |
| 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); |
| 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); |
| } |
| } |
| |
| |
| |
| /** |
| * Examine the quad's texture coordinates to compute the partial |
| * derivatives w.r.t X and Y, then compute lambda (level of detail). |
| */ |
| static float |
| compute_lambda_1d(const struct sp_sampler_varient *samp, |
| const float s[QUAD_SIZE], |
| const float t[QUAD_SIZE], |
| const float p[QUAD_SIZE], |
| float lodbias) |
| { |
| 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->width[0]; |
| float lambda; |
| |
| lambda = util_fast_log2(rho); |
| lambda += lodbias + sampler->lod_bias; |
| lambda = CLAMP(lambda, sampler->min_lod, sampler->max_lod); |
| |
| return lambda; |
| } |
| |
| |
| static float |
| compute_lambda_2d(const struct sp_sampler_varient *samp, |
| const float s[QUAD_SIZE], |
| const float t[QUAD_SIZE], |
| const float p[QUAD_SIZE], |
| float lodbias) |
| { |
| 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]); |
| float dtdy = fabsf(t[QUAD_TOP_LEFT] - t[QUAD_BOTTOM_LEFT]); |
| float maxx = MAX2(dsdx, dsdy) * texture->width[0]; |
| float maxy = MAX2(dtdx, dtdy) * texture->height[0]; |
| float rho = MAX2(maxx, maxy); |
| float lambda; |
| |
| lambda = util_fast_log2(rho); |
| lambda += lodbias + sampler->lod_bias; |
| lambda = CLAMP(lambda, sampler->min_lod, sampler->max_lod); |
| |
| return lambda; |
| } |
| |
| |
| static float |
| compute_lambda_3d(const struct sp_sampler_varient *samp, |
| const float s[QUAD_SIZE], |
| const float t[QUAD_SIZE], |
| const float p[QUAD_SIZE], |
| float lodbias) |
| { |
| 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]); |
| float dtdy = fabsf(t[QUAD_TOP_LEFT] - t[QUAD_BOTTOM_LEFT]); |
| float dpdx = fabsf(p[QUAD_BOTTOM_RIGHT] - p[QUAD_BOTTOM_LEFT]); |
| float dpdy = fabsf(p[QUAD_TOP_LEFT] - p[QUAD_BOTTOM_LEFT]); |
| float maxx = MAX2(dsdx, dsdy) * texture->width[0]; |
| float maxy = MAX2(dtdx, dtdy) * texture->height[0]; |
| float maxz = MAX2(dpdx, dpdy) * texture->depth[0]; |
| float rho, lambda; |
| |
| rho = MAX2(maxx, maxy); |
| rho = MAX2(rho, maxz); |
| |
| lambda = util_fast_log2(rho); |
| lambda += lodbias + sampler->lod_bias; |
| lambda = CLAMP(lambda, sampler->min_lod, sampler->max_lod); |
| |
| return lambda; |
| } |
| |
| |
| /** |
| * Compute lambda for a vertex texture sampler. |
| * Since there aren't derivatives to use, just return the LOD bias. |
| */ |
| static float |
| compute_lambda_vert(const struct sp_sampler_varient *samp, |
| const float s[QUAD_SIZE], |
| const float t[QUAD_SIZE], |
| const float p[QUAD_SIZE], |
| float lodbias) |
| { |
| return lodbias; |
| } |
| |
| |
| |
| /** |
| * Get a texel from a texture, using the texture tile cache. |
| * |
| * \param addr the template tex address containing cube, z, face info. |
| * \param x the x coord of texel within 2D image |
| * \param y the y coord of texel within 2D image |
| * \param rgba the quad to put the texel/color into |
| * |
| * XXX maybe move this into sp_tex_tile_cache.c and merge with the |
| * sp_get_cached_tile_tex() function. Also, get 4 texels instead of 1... |
| */ |
| |
| |
| |
| |
| static INLINE const float * |
| get_texel_2d_no_border(const struct sp_sampler_varient *samp, |
| union tex_tile_address addr, int x, int y) |
| { |
| const struct softpipe_tex_cached_tile *tile; |
| |
| addr.bits.x = x / TILE_SIZE; |
| addr.bits.y = y / TILE_SIZE; |
| y %= TILE_SIZE; |
| x %= TILE_SIZE; |
| |
| tile = sp_get_cached_tile_tex(samp->cache, addr); |
| |
| return &tile->data.color[y][x][0]; |
| } |
| |
| |
| static INLINE const float * |
| get_texel_2d(const struct sp_sampler_varient *samp, |
| union tex_tile_address addr, int x, int y) |
| { |
| const struct pipe_texture *texture = samp->texture; |
| unsigned level = addr.bits.level; |
| |
| if (x < 0 || x >= (int) texture->width[level] || |
| y < 0 || y >= (int) texture->height[level]) { |
| return samp->sampler->border_color; |
| } |
| else { |
| return get_texel_2d_no_border( samp, addr, x, y ); |
| } |
| } |
| |
| |
| /* Gather a quad of adjacent texels within a tile: |
| */ |
| static INLINE void |
| get_texel_quad_2d_no_border_single_tile(const struct sp_sampler_varient *samp, |
| union tex_tile_address addr, |
| unsigned x, unsigned y, |
| const float *out[4]) |
| { |
| const struct softpipe_tex_cached_tile *tile; |
| |
| addr.bits.x = x / TILE_SIZE; |
| addr.bits.y = y / TILE_SIZE; |
| y %= TILE_SIZE; |
| x %= TILE_SIZE; |
| |
| tile = sp_get_cached_tile_tex(samp->cache, addr); |
| |
| out[0] = &tile->data.color[y ][x ][0]; |
| out[1] = &tile->data.color[y ][x+1][0]; |
| out[2] = &tile->data.color[y+1][x ][0]; |
| out[3] = &tile->data.color[y+1][x+1][0]; |
| } |
| |
| |
| /* Gather a quad of potentially non-adjacent texels: |
| */ |
| static INLINE void |
| get_texel_quad_2d_no_border(const struct sp_sampler_varient *samp, |
| union tex_tile_address addr, |
| int x0, int y0, |
| int x1, int y1, |
| const float *out[4]) |
| { |
| out[0] = get_texel_2d_no_border( samp, addr, x0, y0 ); |
| out[1] = get_texel_2d_no_border( samp, addr, x1, y0 ); |
| out[2] = get_texel_2d_no_border( samp, addr, x0, y1 ); |
| out[3] = get_texel_2d_no_border( samp, addr, x1, y1 ); |
| } |
| |
| /* Can involve a lot of unnecessary checks for border color: |
| */ |
| static INLINE void |
| get_texel_quad_2d(const struct sp_sampler_varient *samp, |
| union tex_tile_address addr, |
| int x0, int y0, |
| int x1, int y1, |
| const float *out[4]) |
| { |
| out[0] = get_texel_2d( samp, addr, x0, y0 ); |
| out[1] = get_texel_2d( samp, addr, x1, y0 ); |
| out[3] = get_texel_2d( samp, addr, x1, y1 ); |
| out[2] = get_texel_2d( samp, addr, x0, y1 ); |
| } |
| |
| |
| |
| /* 3d varients: |
| */ |
| static INLINE const float * |
| get_texel_3d_no_border(const struct sp_sampler_varient *samp, |
| union tex_tile_address addr, int x, int y, int z) |
| { |
| const struct softpipe_tex_cached_tile *tile; |
| |
| addr.bits.x = x / TILE_SIZE; |
| addr.bits.y = y / TILE_SIZE; |
| addr.bits.z = z; |
| y %= TILE_SIZE; |
| x %= TILE_SIZE; |
| |
| tile = sp_get_cached_tile_tex(samp->cache, addr); |
| |
| return &tile->data.color[y][x][0]; |
| } |
| |
| |
| static INLINE const float * |
| get_texel_3d(const struct sp_sampler_varient *samp, |
| union tex_tile_address addr, int x, int y, int z) |
| { |
| const struct pipe_texture *texture = samp->texture; |
| unsigned level = addr.bits.level; |
| |
| if (x < 0 || x >= (int) texture->width[level] || |
| y < 0 || y >= (int) texture->height[level] || |
| z < 0 || z >= (int) texture->depth[level]) { |
| return samp->sampler->border_color; |
| } |
| else { |
| return get_texel_3d_no_border( samp, addr, x, y, z ); |
| } |
| } |
| |
| |
| /** |
| * Given the logbase2 of a mipmap's base level size and a mipmap level, |
| * return the size (in texels) of that mipmap level. |
| * For example, if level[0].width = 256 then base_pot will be 8. |
| * If level = 2, then we'll return 64 (the width at level=2). |
| * Return 1 if level > base_pot. |
| */ |
| static INLINE unsigned |
| pot_level_size(unsigned base_pot, unsigned level) |
| { |
| return (base_pot >= level) ? (1 << (base_pot - level)) : 1; |
| } |
| |
| |
| /* Some image-filter fastpaths: |
| */ |
| static INLINE void |
| img_filter_2d_linear_repeat_POT(struct tgsi_sampler *tgsi_sampler, |
| const float s[QUAD_SIZE], |
| const float t[QUAD_SIZE], |
| const float p[QUAD_SIZE], |
| float lodbias, |
| float rgba[NUM_CHANNELS][QUAD_SIZE]) |
| { |
| const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler); |
| unsigned j; |
| unsigned level = samp->level; |
| unsigned xpot = pot_level_size(samp->xpot, level); |
| unsigned ypot = pot_level_size(samp->ypot, level); |
| unsigned xmax = (xpot - 1) & (TILE_SIZE - 1); /* MIN2(TILE_SIZE, xpot) - 1; */ |
| unsigned ymax = (ypot - 1) & (TILE_SIZE - 1); /* MIN2(TILE_SIZE, ypot) - 1; */ |
| union tex_tile_address addr; |
| |
| addr.value = 0; |
| addr.bits.level = samp->level; |
| |
| for (j = 0; j < QUAD_SIZE; j++) { |
| int c; |
| |
| float u = s[j] * xpot - 0.5F; |
| float v = t[j] * ypot - 0.5F; |
| |
| int uflr = util_ifloor(u); |
| int vflr = util_ifloor(v); |
| |
| float xw = u - (float)uflr; |
| float yw = v - (float)vflr; |
| |
| int x0 = uflr & (xpot - 1); |
| int y0 = vflr & (ypot - 1); |
| |
| const float *tx[4]; |
| |
| /* Can we fetch all four at once: |
| */ |
| if (x0 < xmax && y0 < ymax) { |
| get_texel_quad_2d_no_border_single_tile(samp, addr, x0, y0, tx); |
| } |
| else { |
| unsigned x1 = (x0 + 1) & (xpot - 1); |
| unsigned y1 = (y0 + 1) & (ypot - 1); |
| get_texel_quad_2d_no_border(samp, addr, x0, y0, x1, y1, tx); |
| } |
| |
| /* interpolate R, G, B, A */ |
| for (c = 0; c < 4; c++) { |
| rgba[c][j] = lerp_2d(xw, yw, |
| tx[0][c], tx[1][c], |
| tx[2][c], tx[3][c]); |
| } |
| } |
| } |
| |
| |
| static INLINE void |
| img_filter_2d_nearest_repeat_POT(struct tgsi_sampler *tgsi_sampler, |
| const float s[QUAD_SIZE], |
| const float t[QUAD_SIZE], |
| const float p[QUAD_SIZE], |
| float lodbias, |
| float rgba[NUM_CHANNELS][QUAD_SIZE]) |
| { |
| const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler); |
| unsigned j; |
| unsigned level = samp->level; |
| unsigned xpot = pot_level_size(samp->xpot, level); |
| unsigned ypot = pot_level_size(samp->ypot, level); |
| union tex_tile_address addr; |
| |
| addr.value = 0; |
| addr.bits.level = samp->level; |
| |
| for (j = 0; j < QUAD_SIZE; j++) { |
| int c; |
| |
| float u = s[j] * xpot; |
| float v = t[j] * ypot; |
| |
| int uflr = util_ifloor(u); |
| int vflr = util_ifloor(v); |
| |
| int x0 = uflr & (xpot - 1); |
| int y0 = vflr & (ypot - 1); |
| |
| const float *out = get_texel_2d_no_border(samp, addr, x0, y0); |
| |
| for (c = 0; c < 4; c++) { |
| rgba[c][j] = out[c]; |
| } |
| } |
| } |
| |
| |
| static INLINE void |
| img_filter_2d_nearest_clamp_POT(struct tgsi_sampler *tgsi_sampler, |
| const float s[QUAD_SIZE], |
| const float t[QUAD_SIZE], |
| const float p[QUAD_SIZE], |
| float lodbias, |
| float rgba[NUM_CHANNELS][QUAD_SIZE]) |
| { |
| const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler); |
| unsigned j; |
| unsigned level = samp->level; |
| unsigned xpot = pot_level_size(samp->xpot, level); |
| unsigned ypot = pot_level_size(samp->ypot, level); |
| union tex_tile_address addr; |
| |
| addr.value = 0; |
| addr.bits.level = samp->level; |
| |
| for (j = 0; j < QUAD_SIZE; j++) { |
| int c; |
| |
| float u = s[j] * xpot; |
| float v = t[j] * ypot; |
| |
| int x0, y0; |
| const float *out; |
| |
| x0 = util_ifloor(u); |
| if (x0 < 0) |
| x0 = 0; |
| else if (x0 > xpot - 1) |
| x0 = xpot - 1; |
| |
| y0 = util_ifloor(v); |
| if (y0 < 0) |
| y0 = 0; |
| else if (y0 > ypot - 1) |
| y0 = ypot - 1; |
| |
| out = get_texel_2d_no_border(samp, addr, x0, y0); |
| |
| for (c = 0; c < 4; c++) { |
| rgba[c][j] = out[c]; |
| } |
| } |
| } |
| |
| |
| static void |
| img_filter_1d_nearest(struct tgsi_sampler *tgsi_sampler, |
| const float s[QUAD_SIZE], |
| const float t[QUAD_SIZE], |
| const float p[QUAD_SIZE], |
| float lodbias, |
| float rgba[NUM_CHANNELS][QUAD_SIZE]) |
| { |
| const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler); |
| const struct pipe_texture *texture = samp->texture; |
| unsigned level0, j; |
| int width; |
| int x[4]; |
| union tex_tile_address addr; |
| |
| level0 = samp->level; |
| width = texture->width[level0]; |
| |
| assert(width > 0); |
| |
| addr.value = 0; |
| addr.bits.level = samp->level; |
| |
| samp->nearest_texcoord_s(s, width, x); |
| |
| for (j = 0; j < QUAD_SIZE; j++) { |
| const float *out = get_texel_2d(samp, addr, x[j], 0); |
| int c; |
| for (c = 0; c < 4; c++) { |
| rgba[c][j] = out[c]; |
| } |
| } |
| } |
| |
| |
| static void |
| img_filter_2d_nearest(struct tgsi_sampler *tgsi_sampler, |
| const float s[QUAD_SIZE], |
| const float t[QUAD_SIZE], |
| const float p[QUAD_SIZE], |
| float lodbias, |
| float rgba[NUM_CHANNELS][QUAD_SIZE]) |
| { |
| const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler); |
| const struct pipe_texture *texture = samp->texture; |
| unsigned level0, j; |
| int width, height; |
| int x[4], y[4]; |
| union tex_tile_address addr; |
| |
| |
| level0 = samp->level; |
| width = texture->width[level0]; |
| height = texture->height[level0]; |
| |
| assert(width > 0); |
| assert(height > 0); |
| |
| addr.value = 0; |
| addr.bits.level = samp->level; |
| |
| samp->nearest_texcoord_s(s, width, x); |
| samp->nearest_texcoord_t(t, height, y); |
| |
| for (j = 0; j < QUAD_SIZE; j++) { |
| const float *out = get_texel_2d(samp, addr, x[j], y[j]); |
| int c; |
| for (c = 0; c < 4; c++) { |
| rgba[c][j] = out[c]; |
| } |
| } |
| } |
| |
| |
| static INLINE union tex_tile_address |
| face(union tex_tile_address addr, unsigned face ) |
| { |
| addr.bits.face = face; |
| return addr; |
| } |
| |
| |
| static void |
| img_filter_cube_nearest(struct tgsi_sampler *tgsi_sampler, |
| const float s[QUAD_SIZE], |
| const float t[QUAD_SIZE], |
| const float p[QUAD_SIZE], |
| float lodbias, |
| float rgba[NUM_CHANNELS][QUAD_SIZE]) |
| { |
| const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler); |
| const struct pipe_texture *texture = samp->texture; |
| const unsigned *faces = samp->faces; /* zero when not cube-mapping */ |
| unsigned level0, j; |
| int width, height; |
| int x[4], y[4]; |
| union tex_tile_address addr; |
| |
| level0 = samp->level; |
| width = texture->width[level0]; |
| height = texture->height[level0]; |
| |
| assert(width > 0); |
| assert(height > 0); |
| |
| addr.value = 0; |
| addr.bits.level = samp->level; |
| |
| samp->nearest_texcoord_s(s, width, x); |
| samp->nearest_texcoord_t(t, height, y); |
| |
| for (j = 0; j < QUAD_SIZE; j++) { |
| const float *out = get_texel_2d(samp, face(addr, faces[j]), x[j], y[j]); |
| int c; |
| for (c = 0; c < 4; c++) { |
| rgba[c][j] = out[c]; |
| } |
| } |
| } |
| |
| |
| static void |
| img_filter_3d_nearest(struct tgsi_sampler *tgsi_sampler, |
| const float s[QUAD_SIZE], |
| const float t[QUAD_SIZE], |
| const float p[QUAD_SIZE], |
| float lodbias, |
| float rgba[NUM_CHANNELS][QUAD_SIZE]) |
| { |
| const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler); |
| const struct pipe_texture *texture = samp->texture; |
| unsigned level0, j; |
| int width, height, depth; |
| int x[4], y[4], z[4]; |
| union tex_tile_address addr; |
| |
| level0 = samp->level; |
| width = texture->width[level0]; |
| height = texture->height[level0]; |
| depth = texture->depth[level0]; |
| |
| assert(width > 0); |
| assert(height > 0); |
| assert(depth > 0); |
| |
| samp->nearest_texcoord_s(s, width, x); |
| samp->nearest_texcoord_t(t, height, y); |
| samp->nearest_texcoord_p(p, depth, z); |
| |
| addr.value = 0; |
| addr.bits.level = samp->level; |
| |
| for (j = 0; j < QUAD_SIZE; j++) { |
| const float *out = get_texel_3d(samp, addr, x[j], y[j], z[j]); |
| int c; |
| for (c = 0; c < 4; c++) { |
| rgba[c][j] = out[c]; |
| } |
| } |
| } |
| |
| |
| static void |
| img_filter_1d_linear(struct tgsi_sampler *tgsi_sampler, |
| const float s[QUAD_SIZE], |
| const float t[QUAD_SIZE], |
| const float p[QUAD_SIZE], |
| float lodbias, |
| float rgba[NUM_CHANNELS][QUAD_SIZE]) |
| { |
| const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler); |
| const struct pipe_texture *texture = samp->texture; |
| unsigned level0, j; |
| int width; |
| int x0[4], x1[4]; |
| float xw[4]; /* weights */ |
| union tex_tile_address addr; |
| |
| level0 = samp->level; |
| width = texture->width[level0]; |
| |
| assert(width > 0); |
| |
| addr.value = 0; |
| addr.bits.level = samp->level; |
| |
| samp->linear_texcoord_s(s, width, x0, x1, xw); |
| |
| for (j = 0; j < QUAD_SIZE; j++) { |
| const float *tx0 = get_texel_2d(samp, addr, x0[j], 0); |
| const float *tx1 = get_texel_2d(samp, addr, x1[j], 0); |
| int c; |
| |
| /* interpolate R, G, B, A */ |
| for (c = 0; c < 4; c++) { |
| rgba[c][j] = lerp(xw[j], tx0[c], tx1[c]); |
| } |
| } |
| } |
| |
| |
| static void |
| img_filter_2d_linear(struct tgsi_sampler *tgsi_sampler, |
| const float s[QUAD_SIZE], |
| const float t[QUAD_SIZE], |
| const float p[QUAD_SIZE], |
| float lodbias, |
| float rgba[NUM_CHANNELS][QUAD_SIZE]) |
| { |
| const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler); |
| const struct pipe_texture *texture = samp->texture; |
| unsigned level0, j; |
| int width, height; |
| int x0[4], y0[4], x1[4], y1[4]; |
| float xw[4], yw[4]; /* weights */ |
| union tex_tile_address addr; |
| |
| level0 = samp->level; |
| width = texture->width[level0]; |
| height = texture->height[level0]; |
| |
| assert(width > 0); |
| assert(height > 0); |
| |
| addr.value = 0; |
| addr.bits.level = samp->level; |
| |
| samp->linear_texcoord_s(s, width, x0, x1, xw); |
| samp->linear_texcoord_t(t, height, y0, y1, yw); |
| |
| for (j = 0; j < QUAD_SIZE; j++) { |
| const float *tx0 = get_texel_2d(samp, addr, x0[j], y0[j]); |
| const float *tx1 = get_texel_2d(samp, addr, x1[j], y0[j]); |
| const float *tx2 = get_texel_2d(samp, addr, x0[j], y1[j]); |
| const float *tx3 = get_texel_2d(samp, addr, x1[j], y1[j]); |
| int c; |
| |
| /* interpolate R, G, B, A */ |
| for (c = 0; c < 4; c++) { |
| rgba[c][j] = lerp_2d(xw[j], yw[j], |
| tx0[c], tx1[c], |
| tx2[c], tx3[c]); |
| } |
| } |
| } |
| |
| |
| static void |
| img_filter_cube_linear(struct tgsi_sampler *tgsi_sampler, |
| const float s[QUAD_SIZE], |
| const float t[QUAD_SIZE], |
| const float p[QUAD_SIZE], |
| float lodbias, |
| float rgba[NUM_CHANNELS][QUAD_SIZE]) |
| { |
| const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler); |
| const struct pipe_texture *texture = samp->texture; |
| const unsigned *faces = samp->faces; /* zero when not cube-mapping */ |
| unsigned level0, j; |
| int width, height; |
| int x0[4], y0[4], x1[4], y1[4]; |
| float xw[4], yw[4]; /* weights */ |
| union tex_tile_address addr; |
| |
| level0 = samp->level; |
| width = texture->width[level0]; |
| height = texture->height[level0]; |
| |
| assert(width > 0); |
| assert(height > 0); |
| |
| addr.value = 0; |
| addr.bits.level = samp->level; |
| |
| samp->linear_texcoord_s(s, width, x0, x1, xw); |
| samp->linear_texcoord_t(t, height, y0, y1, yw); |
| |
| for (j = 0; j < QUAD_SIZE; j++) { |
| union tex_tile_address addrj = face(addr, faces[j]); |
| const float *tx0 = get_texel_2d(samp, addrj, x0[j], y0[j]); |
| const float *tx1 = get_texel_2d(samp, addrj, x1[j], y0[j]); |
| const float *tx2 = get_texel_2d(samp, addrj, x0[j], y1[j]); |
| const float *tx3 = get_texel_2d(samp, addrj, x1[j], y1[j]); |
| int c; |
| |
| /* interpolate R, G, B, A */ |
| for (c = 0; c < 4; c++) { |
| rgba[c][j] = lerp_2d(xw[j], yw[j], |
| tx0[c], tx1[c], |
| tx2[c], tx3[c]); |
| } |
| } |
| } |
| |
| |
| static void |
| img_filter_3d_linear(struct tgsi_sampler *tgsi_sampler, |
| const float s[QUAD_SIZE], |
| const float t[QUAD_SIZE], |
| const float p[QUAD_SIZE], |
| float lodbias, |
| float rgba[NUM_CHANNELS][QUAD_SIZE]) |
| { |
| const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler); |
| const struct pipe_texture *texture = samp->texture; |
| unsigned level0, j; |
| int width, height, depth; |
| int x0[4], x1[4], y0[4], y1[4], z0[4], z1[4]; |
| float xw[4], yw[4], zw[4]; /* interpolation weights */ |
| union tex_tile_address addr; |
| |
| level0 = samp->level; |
| width = texture->width[level0]; |
| height = texture->height[level0]; |
| depth = texture->depth[level0]; |
| |
| addr.value = 0; |
| addr.bits.level = level0; |
| |
| assert(width > 0); |
| assert(height > 0); |
| assert(depth > 0); |
| |
| samp->linear_texcoord_s(s, width, x0, x1, xw); |
| samp->linear_texcoord_t(t, height, y0, y1, yw); |
| samp->linear_texcoord_p(p, depth, z0, z1, zw); |
| |
| for (j = 0; j < QUAD_SIZE; j++) { |
| int c; |
| |
| const float *tx00 = get_texel_3d(samp, addr, x0[j], y0[j], z0[j]); |
| const float *tx01 = get_texel_3d(samp, addr, x1[j], y0[j], z0[j]); |
| const float *tx02 = get_texel_3d(samp, addr, x0[j], y1[j], z0[j]); |
| const float *tx03 = get_texel_3d(samp, addr, x1[j], y1[j], z0[j]); |
| |
| const float *tx10 = get_texel_3d(samp, addr, x0[j], y0[j], z1[j]); |
| const float *tx11 = get_texel_3d(samp, addr, x1[j], y0[j], z1[j]); |
| const float *tx12 = get_texel_3d(samp, addr, x0[j], y1[j], z1[j]); |
| const float *tx13 = get_texel_3d(samp, addr, x1[j], y1[j], z1[j]); |
| |
| /* interpolate R, G, B, A */ |
| for (c = 0; c < 4; c++) { |
| rgba[c][j] = lerp_3d(xw[j], yw[j], zw[j], |
| tx00[c], tx01[c], |
| tx02[c], tx03[c], |
| tx10[c], tx11[c], |
| tx12[c], tx13[c]); |
| } |
| } |
| } |
| |
| |
| static void |
| mip_filter_linear(struct tgsi_sampler *tgsi_sampler, |
| const float s[QUAD_SIZE], |
| const float t[QUAD_SIZE], |
| const float p[QUAD_SIZE], |
| float lodbias, |
| float rgba[NUM_CHANNELS][QUAD_SIZE]) |
| { |
| struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler); |
| const struct pipe_texture *texture = samp->texture; |
| int level0; |
| float lambda; |
| |
| lambda = samp->compute_lambda(samp, s, t, p, lodbias); |
| level0 = (int)lambda; |
| |
| if (lambda < 0.0) { |
| samp->level = 0; |
| samp->mag_img_filter( tgsi_sampler, s, t, p, 0, rgba ); |
| } |
| else if (level0 >= texture->last_level) { |
| samp->level = texture->last_level; |
| samp->min_img_filter( tgsi_sampler, s, t, p, 0, rgba ); |
| } |
| else { |
| float levelBlend = lambda - level0; |
| float rgba0[4][4]; |
| float rgba1[4][4]; |
| int c,j; |
| |
| samp->level = level0; |
| samp->min_img_filter( tgsi_sampler, s, t, p, 0, rgba0 ); |
| |
| samp->level = level0+1; |
| samp->min_img_filter( tgsi_sampler, s, t, p, 0, rgba1 ); |
| |
| for (j = 0; j < QUAD_SIZE; j++) { |
| for (c = 0; c < 4; c++) { |
| rgba[c][j] = lerp(levelBlend, rgba0[c][j], rgba1[c][j]); |
| } |
| } |
| } |
| } |
| |
| |
| static void |
| mip_filter_nearest(struct tgsi_sampler *tgsi_sampler, |
| const float s[QUAD_SIZE], |
| const float t[QUAD_SIZE], |
| const float p[QUAD_SIZE], |
| float lodbias, |
| float rgba[NUM_CHANNELS][QUAD_SIZE]) |
| { |
| struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler); |
| const struct pipe_texture *texture = samp->texture; |
| float lambda; |
| |
| lambda = samp->compute_lambda(samp, s, t, p, lodbias); |
| |
| if (lambda < 0.0) { |
| samp->level = 0; |
| samp->mag_img_filter( tgsi_sampler, s, t, p, 0, rgba ); |
| } |
| else { |
| samp->level = (int)(lambda + 0.5) ; |
| samp->level = MIN2(samp->level, (int)texture->last_level); |
| samp->min_img_filter( tgsi_sampler, s, t, p, 0, rgba ); |
| } |
| |
| #if 0 |
| printf("RGBA %g %g %g %g, %g %g %g %g, %g %g %g %g, %g %g %g %g\n", |
| rgba[0][0], rgba[1][0], rgba[2][0], rgba[3][0], |
| rgba[0][1], rgba[1][1], rgba[2][1], rgba[3][1], |
| rgba[0][2], rgba[1][2], rgba[2][2], rgba[3][2], |
| rgba[0][3], rgba[1][3], rgba[2][3], rgba[3][3]); |
| #endif |
| } |
| |
| |
| static void |
| mip_filter_none(struct tgsi_sampler *tgsi_sampler, |
| const float s[QUAD_SIZE], |
| const float t[QUAD_SIZE], |
| const float p[QUAD_SIZE], |
| float lodbias, |
| float rgba[NUM_CHANNELS][QUAD_SIZE]) |
| { |
| struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler); |
| float lambda = samp->compute_lambda(samp, s, t, p, lodbias); |
| |
| if (lambda < 0.0) { |
| samp->mag_img_filter( tgsi_sampler, s, t, p, 0, rgba ); |
| } |
| else { |
| samp->min_img_filter( tgsi_sampler, s, t, p, 0, rgba ); |
| } |
| } |
| |
| |
| |
| /** |
| * Specialized version of mip_filter_linear with hard-wired calls to |
| * 2d lambda calculation and 2d_linear_repeat_POT img filters. |
| */ |
| static void |
| mip_filter_linear_2d_linear_repeat_POT( |
| struct tgsi_sampler *tgsi_sampler, |
| const float s[QUAD_SIZE], |
| const float t[QUAD_SIZE], |
| const float p[QUAD_SIZE], |
| float lodbias, |
| float rgba[NUM_CHANNELS][QUAD_SIZE]) |
| { |
| struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler); |
| const struct pipe_texture *texture = samp->texture; |
| int level0; |
| float lambda; |
| |
| lambda = compute_lambda_2d(samp, s, t, p, lodbias); |
| level0 = (int)lambda; |
| |
| /* Catches both negative and large values of level0: |
| */ |
| if ((unsigned)level0 >= texture->last_level) { |
| if (level0 < 0) |
| samp->level = 0; |
| else |
| samp->level = texture->last_level; |
| |
| img_filter_2d_linear_repeat_POT( tgsi_sampler, s, t, p, 0, rgba ); |
| } |
| else { |
| float levelBlend = lambda - level0; |
| float rgba0[4][4]; |
| float rgba1[4][4]; |
| int c,j; |
| |
| samp->level = level0; |
| img_filter_2d_linear_repeat_POT( tgsi_sampler, s, t, p, 0, rgba0 ); |
| |
| samp->level = level0+1; |
| img_filter_2d_linear_repeat_POT( tgsi_sampler, s, t, p, 0, rgba1 ); |
| |
| for (j = 0; j < QUAD_SIZE; j++) { |
| for (c = 0; c < 4; c++) { |
| rgba[c][j] = lerp(levelBlend, rgba0[c][j], rgba1[c][j]); |
| } |
| } |
| } |
| } |
| |
| |
| |
| /** |
| * Do shadow/depth comparisons. |
| */ |
| static void |
| sample_compare(struct tgsi_sampler *tgsi_sampler, |
| const float s[QUAD_SIZE], |
| const float t[QUAD_SIZE], |
| const float p[QUAD_SIZE], |
| float lodbias, |
| float rgba[NUM_CHANNELS][QUAD_SIZE]) |
| { |
| struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler); |
| const struct pipe_sampler_state *sampler = samp->sampler; |
| int j, k0, k1, k2, k3; |
| float val; |
| |
| samp->mip_filter( tgsi_sampler, s, t, p, lodbias, rgba ); |
| |
| /** |
| * Compare texcoord 'p' (aka R) against texture value 'rgba[0]' |
| * When we sampled the depth texture, the depth value was put into all |
| * RGBA channels. We look at the red channel here. |
| */ |
| |
| /* compare four texcoords vs. four texture samples */ |
| switch (sampler->compare_func) { |
| case PIPE_FUNC_LESS: |
| k0 = p[0] < rgba[0][0]; |
| k1 = p[1] < rgba[0][1]; |
| k2 = p[2] < rgba[0][2]; |
| k3 = p[3] < rgba[0][3]; |
| break; |
| case PIPE_FUNC_LEQUAL: |
| k0 = p[0] <= rgba[0][0]; |
| k1 = p[1] <= rgba[0][1]; |
| k2 = p[2] <= rgba[0][2]; |
| k3 = p[3] <= rgba[0][3]; |
| break; |
| case PIPE_FUNC_GREATER: |
| k0 = p[0] > rgba[0][0]; |
| k1 = p[1] > rgba[0][1]; |
| k2 = p[2] > rgba[0][2]; |
| k3 = p[3] > rgba[0][3]; |
| break; |
| case PIPE_FUNC_GEQUAL: |
| k0 = p[0] >= rgba[0][0]; |
| k1 = p[1] >= rgba[0][1]; |
| k2 = p[2] >= rgba[0][2]; |
| k3 = p[3] >= rgba[0][3]; |
| break; |
| case PIPE_FUNC_EQUAL: |
| k0 = p[0] == rgba[0][0]; |
| k1 = p[1] == rgba[0][1]; |
| k2 = p[2] == rgba[0][2]; |
| k3 = p[3] == rgba[0][3]; |
| break; |
| case PIPE_FUNC_NOTEQUAL: |
| k0 = p[0] != rgba[0][0]; |
| k1 = p[1] != rgba[0][1]; |
| k2 = p[2] != rgba[0][2]; |
| k3 = p[3] != rgba[0][3]; |
| break; |
| case PIPE_FUNC_ALWAYS: |
| k0 = k1 = k2 = k3 = 1; |
| break; |
| case PIPE_FUNC_NEVER: |
| k0 = k1 = k2 = k3 = 0; |
| break; |
| default: |
| k0 = k1 = k2 = k3 = 0; |
| assert(0); |
| break; |
| } |
| |
| /* convert four pass/fail values to an intensity in [0,1] */ |
| val = 0.25F * (k0 + k1 + k2 + k3); |
| |
| /* XXX returning result for default GL_DEPTH_TEXTURE_MODE = GL_LUMINANCE */ |
| for (j = 0; j < 4; j++) { |
| rgba[0][j] = rgba[1][j] = rgba[2][j] = val; |
| rgba[3][j] = 1.0F; |
| } |
| } |
| |
| |
| /** |
| * Compute which cube face is referenced by each texcoord and put that |
| * info into the sampler faces[] array. Then sample the cube faces |
| */ |
| static void |
| sample_cube(struct tgsi_sampler *tgsi_sampler, |
| const float s[QUAD_SIZE], |
| const float t[QUAD_SIZE], |
| const float p[QUAD_SIZE], |
| float lodbias, |
| float rgba[NUM_CHANNELS][QUAD_SIZE]) |
| { |
| struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler); |
| unsigned j; |
| float ssss[4], tttt[4]; |
| |
| /* |
| major axis |
| 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 |
| -ry TEXTURE_CUBE_MAP_NEGATIVE_Y_EXT +rx -rz ry |
| +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]; |
| 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; |
| } |
| } |
| 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; |
| } |
| } |
| 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; |
| } |
| } |
| |
| { |
| 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 |
| * is not active, this will point somewhere deeper into the |
| * pipeline, eg. to mip_filter or even img_filter. |
| */ |
| samp->compare(tgsi_sampler, ssss, tttt, NULL, lodbias, rgba); |
| } |
| |
| |
| |
| static wrap_nearest_func |
| get_nearest_unorm_wrap(unsigned mode) |
| { |
| switch (mode) { |
| case PIPE_TEX_WRAP_CLAMP: |
| return wrap_nearest_unorm_clamp; |
| case PIPE_TEX_WRAP_CLAMP_TO_EDGE: |
| case PIPE_TEX_WRAP_CLAMP_TO_BORDER: |
| return wrap_nearest_unorm_clamp_to_border; |
| default: |
| assert(0); |
| return wrap_nearest_unorm_clamp; |
| } |
| } |
| |
| |
| static wrap_nearest_func |
| get_nearest_wrap(unsigned mode) |
| { |
| switch (mode) { |
| case PIPE_TEX_WRAP_REPEAT: |
| return wrap_nearest_repeat; |
| case PIPE_TEX_WRAP_CLAMP: |
| return wrap_nearest_clamp; |
| case PIPE_TEX_WRAP_CLAMP_TO_EDGE: |
| return wrap_nearest_clamp_to_edge; |
| case PIPE_TEX_WRAP_CLAMP_TO_BORDER: |
| return wrap_nearest_clamp_to_border; |
| case PIPE_TEX_WRAP_MIRROR_REPEAT: |
| return wrap_nearest_mirror_repeat; |
| case PIPE_TEX_WRAP_MIRROR_CLAMP: |
| return wrap_nearest_mirror_clamp; |
| case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE: |
| return wrap_nearest_mirror_clamp_to_edge; |
| case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER: |
| return wrap_nearest_mirror_clamp_to_border; |
| default: |
| assert(0); |
| return wrap_nearest_repeat; |
| } |
| } |
| |
| |
| static wrap_linear_func |
| get_linear_unorm_wrap(unsigned mode) |
| { |
| switch (mode) { |
| case PIPE_TEX_WRAP_CLAMP: |
| return wrap_linear_unorm_clamp; |
| case PIPE_TEX_WRAP_CLAMP_TO_EDGE: |
| case PIPE_TEX_WRAP_CLAMP_TO_BORDER: |
| return wrap_linear_unorm_clamp_to_border; |
| default: |
| assert(0); |
| return wrap_linear_unorm_clamp; |
| } |
| } |
| |
| |
| static wrap_linear_func |
| get_linear_wrap(unsigned mode) |
| { |
| switch (mode) { |
| case PIPE_TEX_WRAP_REPEAT: |
| return wrap_linear_repeat; |
| case PIPE_TEX_WRAP_CLAMP: |
| return wrap_linear_clamp; |
| case PIPE_TEX_WRAP_CLAMP_TO_EDGE: |
| return wrap_linear_clamp_to_edge; |
| case PIPE_TEX_WRAP_CLAMP_TO_BORDER: |
| return wrap_linear_clamp_to_border; |
| case PIPE_TEX_WRAP_MIRROR_REPEAT: |
| return wrap_linear_mirror_repeat; |
| case PIPE_TEX_WRAP_MIRROR_CLAMP: |
| return wrap_linear_mirror_clamp; |
| case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE: |
| return wrap_linear_mirror_clamp_to_edge; |
| case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER: |
| return wrap_linear_mirror_clamp_to_border; |
| default: |
| assert(0); |
| return wrap_linear_repeat; |
| } |
| } |
| |
| |
| static compute_lambda_func |
| get_lambda_func(const union sp_sampler_key key) |
| { |
| if (key.bits.processor == TGSI_PROCESSOR_VERTEX) |
| return compute_lambda_vert; |
| |
| switch (key.bits.target) { |
| case PIPE_TEXTURE_1D: |
| return compute_lambda_1d; |
| case PIPE_TEXTURE_2D: |
| case PIPE_TEXTURE_CUBE: |
| return compute_lambda_2d; |
| case PIPE_TEXTURE_3D: |
| return compute_lambda_3d; |
| default: |
| assert(0); |
| return compute_lambda_1d; |
| } |
| } |
| |
| |
| static filter_func |
| get_img_filter(const union sp_sampler_key key, |
| unsigned filter, |
| const struct pipe_sampler_state *sampler) |
| { |
| switch (key.bits.target) { |
| case PIPE_TEXTURE_1D: |
| if (filter == PIPE_TEX_FILTER_NEAREST) |
| return img_filter_1d_nearest; |
| else |
| return img_filter_1d_linear; |
| break; |
| case PIPE_TEXTURE_2D: |
| /* Try for fast path: |
| */ |
| if (key.bits.is_pot && |
| sampler->wrap_s == sampler->wrap_t && |
| sampler->normalized_coords) |
| { |
| switch (sampler->wrap_s) { |
| case PIPE_TEX_WRAP_REPEAT: |
| switch (filter) { |
| case PIPE_TEX_FILTER_NEAREST: |
| return img_filter_2d_nearest_repeat_POT; |
| case PIPE_TEX_FILTER_LINEAR: |
| return img_filter_2d_linear_repeat_POT; |
| default: |
| break; |
| } |
| break; |
| case PIPE_TEX_WRAP_CLAMP: |
| switch (filter) { |
| case PIPE_TEX_FILTER_NEAREST: |
| return img_filter_2d_nearest_clamp_POT; |
| default: |
| break; |
| } |
| } |
| } |
| /* Otherwise use default versions: |
| */ |
| if (filter == PIPE_TEX_FILTER_NEAREST) |
| return img_filter_2d_nearest; |
| else |
| return img_filter_2d_linear; |
| break; |
| case PIPE_TEXTURE_CUBE: |
| if (filter == PIPE_TEX_FILTER_NEAREST) |
| return img_filter_cube_nearest; |
| else |
| return img_filter_cube_linear; |
| break; |
| case PIPE_TEXTURE_3D: |
| if (filter == PIPE_TEX_FILTER_NEAREST) |
| return img_filter_3d_nearest; |
| else |
| return img_filter_3d_linear; |
| break; |
| default: |
| assert(0); |
| return img_filter_1d_nearest; |
| } |
| } |
| |
| |
| /** |
| * Bind the given texture object and texture cache to the sampler varient. |
| */ |
| void |
| sp_sampler_varient_bind_texture( struct sp_sampler_varient *samp, |
| struct softpipe_tex_tile_cache *tex_cache, |
| const struct pipe_texture *texture ) |
| { |
| const struct pipe_sampler_state *sampler = samp->sampler; |
| |
| samp->texture = texture; |
| samp->cache = tex_cache; |
| samp->xpot = util_unsigned_logbase2( texture->width[0] ); |
| samp->ypot = util_unsigned_logbase2( texture->height[0] ); |
| samp->level = CLAMP((int) sampler->min_lod, 0, (int) texture->last_level); |
| } |
| |
| |
| void |
| sp_sampler_varient_destroy( struct sp_sampler_varient *samp ) |
| { |
| FREE(samp); |
| } |
| |
| |
| /** |
| * Create a sampler varient for a given set of non-orthogonal state. |
| */ |
| struct sp_sampler_varient * |
| sp_create_sampler_varient( const struct pipe_sampler_state *sampler, |
| const union sp_sampler_key key ) |
| { |
| struct sp_sampler_varient *samp = CALLOC_STRUCT(sp_sampler_varient); |
| if (!samp) |
| return NULL; |
| |
| samp->sampler = sampler; |
| samp->key = key; |
| |
| /* Note that (for instance) linear_texcoord_s and |
| * nearest_texcoord_s may be active at the same time, if the |
| * sampler min_img_filter differs from its mag_img_filter. |
| */ |
| if (sampler->normalized_coords) { |
| samp->linear_texcoord_s = get_linear_wrap( sampler->wrap_s ); |
| samp->linear_texcoord_t = get_linear_wrap( sampler->wrap_t ); |
| samp->linear_texcoord_p = get_linear_wrap( sampler->wrap_r ); |
| |
| samp->nearest_texcoord_s = get_nearest_wrap( sampler->wrap_s ); |
| samp->nearest_texcoord_t = get_nearest_wrap( sampler->wrap_t ); |
| samp->nearest_texcoord_p = get_nearest_wrap( sampler->wrap_r ); |
| } |
| else { |
| samp->linear_texcoord_s = get_linear_unorm_wrap( sampler->wrap_s ); |
| samp->linear_texcoord_t = get_linear_unorm_wrap( sampler->wrap_t ); |
| samp->linear_texcoord_p = get_linear_unorm_wrap( sampler->wrap_r ); |
| |
| samp->nearest_texcoord_s = get_nearest_unorm_wrap( sampler->wrap_s ); |
| samp->nearest_texcoord_t = get_nearest_unorm_wrap( sampler->wrap_t ); |
| samp->nearest_texcoord_p = get_nearest_unorm_wrap( sampler->wrap_r ); |
| } |
| |
| samp->compute_lambda = get_lambda_func( key ); |
| |
| samp->min_img_filter = get_img_filter(key, sampler->min_img_filter, sampler); |
| samp->mag_img_filter = get_img_filter(key, sampler->mag_img_filter, sampler); |
| |
| switch (sampler->min_mip_filter) { |
| case PIPE_TEX_MIPFILTER_NONE: |
| if (sampler->min_img_filter == sampler->mag_img_filter) |
| samp->mip_filter = samp->min_img_filter; |
| else |
| samp->mip_filter = mip_filter_none; |
| break; |
| |
| case PIPE_TEX_MIPFILTER_NEAREST: |
| samp->mip_filter = mip_filter_nearest; |
| break; |
| |
| case PIPE_TEX_MIPFILTER_LINEAR: |
| if (key.bits.is_pot && |
| sampler->min_img_filter == sampler->mag_img_filter && |
| sampler->normalized_coords && |
| sampler->wrap_s == PIPE_TEX_WRAP_REPEAT && |
| sampler->wrap_t == PIPE_TEX_WRAP_REPEAT && |
| sampler->min_img_filter == PIPE_TEX_FILTER_LINEAR) |
| { |
| samp->mip_filter = mip_filter_linear_2d_linear_repeat_POT; |
| } |
| else |
| { |
| samp->mip_filter = mip_filter_linear; |
| } |
| break; |
| } |
| |
| if (sampler->compare_mode != FALSE) { |
| samp->compare = sample_compare; |
| } |
| else { |
| /* Skip compare operation by promoting the mip_filter function |
| * pointer: |
| */ |
| samp->compare = samp->mip_filter; |
| } |
| |
| if (key.bits.target == PIPE_TEXTURE_CUBE) { |
| samp->base.get_samples = sample_cube; |
| } |
| else { |
| samp->faces[0] = 0; |
| samp->faces[1] = 0; |
| samp->faces[2] = 0; |
| samp->faces[3] = 0; |
| |
| /* Skip cube face determination by promoting the compare |
| * function pointer: |
| */ |
| samp->base.get_samples = samp->compare; |
| } |
| |
| return samp; |
| } |