diff options
Diffstat (limited to 'src/gallium/drivers/i915simple/i915_state_sampler.c')
| -rw-r--r-- | src/gallium/drivers/i915simple/i915_state_sampler.c | 299 |
1 files changed, 299 insertions, 0 deletions
diff --git a/src/gallium/drivers/i915simple/i915_state_sampler.c b/src/gallium/drivers/i915simple/i915_state_sampler.c new file mode 100644 index 00000000000..c09c10601b4 --- /dev/null +++ b/src/gallium/drivers/i915simple/i915_state_sampler.c @@ -0,0 +1,299 @@ +/************************************************************************** + * + * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas. + * 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. + * + **************************************************************************/ + +#include "pipe/p_context.h" +#include "pipe/p_state.h" +#include "util/u_memory.h" + +#include "i915_state_inlines.h" +#include "i915_context.h" +#include "i915_reg.h" +#include "i915_state.h" + + +/* + * A note about min_lod & max_lod. + * + * There is a circular dependancy between the sampler state + * and the map state to be submitted to hw. + * + * Two condition must be meet: + * min_lod =< max_lod == true + * max_lod =< last_level == true + * + * + * This is all fine and dandy if it where for the fact that max_lod + * is set on the map state instead of the sampler state. That is + * the max_lod we submit on map is: + * max_lod = MIN2(last_level, max_lod); + * + * So we need to update the map state when we change samplers and + * we need to be change the sampler state when map state is changed. + * The first part is done by calling i915_update_texture in + * i915_update_samplers and the second part is done else where in + * code tracking the state changes. + */ + +static void +i915_update_texture(struct i915_context *i915, + uint unit, + const struct i915_texture *tex, + const struct i915_sampler_state *sampler, + uint state[6]); +/** + * Compute i915 texture sampling state. + * + * Recalculate all state from scratch. Perhaps not the most + * efficient, but this has gotten complex enough that we need + * something which is understandable and reliable. + * \param state returns the 3 words of compute state + */ +static void update_sampler(struct i915_context *i915, + uint unit, + const struct i915_sampler_state *sampler, + const struct i915_texture *tex, + unsigned state[3] ) +{ + const struct pipe_texture *pt = &tex->base; + unsigned minlod, lastlod; + + /* Need to do this after updating the maps, which call the + * intel_finalize_mipmap_tree and hence can update firstLevel: + */ + state[0] = sampler->state[0]; + state[1] = sampler->state[1]; + state[2] = sampler->state[2]; + + if (pt->format == PIPE_FORMAT_YCBCR || + pt->format == PIPE_FORMAT_YCBCR_REV) + state[0] |= SS2_COLORSPACE_CONVERSION; + + /* 3D textures don't seem to respect the border color. + * Fallback if there's ever a danger that they might refer to + * it. + * + * Effectively this means fallback on 3D clamp or + * clamp_to_border. + * + * XXX: Check if this is true on i945. + * XXX: Check if this bug got fixed in release silicon. + */ +#if 0 + { + const unsigned ws = sampler->templ->wrap_s; + const unsigned wt = sampler->templ->wrap_t; + const unsigned wr = sampler->templ->wrap_r; + if (pt->target == PIPE_TEXTURE_3D && + (sampler->templ->min_img_filter != PIPE_TEX_FILTER_NEAREST || + sampler->templ->mag_img_filter != PIPE_TEX_FILTER_NEAREST) && + (ws == PIPE_TEX_WRAP_CLAMP || + wt == PIPE_TEX_WRAP_CLAMP || + wr == PIPE_TEX_WRAP_CLAMP || + ws == PIPE_TEX_WRAP_CLAMP_TO_BORDER || + wt == PIPE_TEX_WRAP_CLAMP_TO_BORDER || + wr == PIPE_TEX_WRAP_CLAMP_TO_BORDER)) { + if (i915->strict_conformance) { + assert(0); + /* sampler->fallback = true; */ + /* TODO */ + } + } + } +#endif + + /* See note at the top of file */ + minlod = sampler->minlod; + lastlod = pt->last_level << 4; + + if (lastlod < minlod) { + minlod = lastlod; + } + + state[1] |= (sampler->minlod << SS3_MIN_LOD_SHIFT); + state[1] |= (unit << SS3_TEXTUREMAP_INDEX_SHIFT); +} + + +void i915_update_samplers( struct i915_context *i915 ) +{ + uint unit; + + i915->current.sampler_enable_nr = 0; + i915->current.sampler_enable_flags = 0x0; + + for (unit = 0; unit < i915->num_textures && unit < i915->num_samplers; + unit++) { + /* determine unit enable/disable by looking for a bound texture */ + /* could also examine the fragment program? */ + if (i915->texture[unit]) { + update_sampler( i915, + unit, + i915->sampler[unit], /* sampler state */ + i915->texture[unit], /* texture */ + i915->current.sampler[unit] /* the result */ + ); + i915_update_texture( i915, + unit, + i915->texture[unit], /* texture */ + i915->sampler[unit], /* sampler state */ + i915->current.texbuffer[unit] ); + + i915->current.sampler_enable_nr++; + i915->current.sampler_enable_flags |= (1 << unit); + } + } + + i915->hardware_dirty |= I915_HW_SAMPLER | I915_HW_MAP; +} + + +static uint +translate_texture_format(enum pipe_format pipeFormat) +{ + switch (pipeFormat) { + case PIPE_FORMAT_L8_UNORM: + return MAPSURF_8BIT | MT_8BIT_L8; + case PIPE_FORMAT_I8_UNORM: + return MAPSURF_8BIT | MT_8BIT_I8; + case PIPE_FORMAT_A8_UNORM: + return MAPSURF_8BIT | MT_8BIT_A8; + case PIPE_FORMAT_A8L8_UNORM: + return MAPSURF_16BIT | MT_16BIT_AY88; + case PIPE_FORMAT_R5G6B5_UNORM: + return MAPSURF_16BIT | MT_16BIT_RGB565; + case PIPE_FORMAT_A1R5G5B5_UNORM: + return MAPSURF_16BIT | MT_16BIT_ARGB1555; + case PIPE_FORMAT_A4R4G4B4_UNORM: + return MAPSURF_16BIT | MT_16BIT_ARGB4444; + case PIPE_FORMAT_A8R8G8B8_UNORM: + return MAPSURF_32BIT | MT_32BIT_ARGB8888; + case PIPE_FORMAT_YCBCR_REV: + return (MAPSURF_422 | MT_422_YCRCB_NORMAL); + case PIPE_FORMAT_YCBCR: + return (MAPSURF_422 | MT_422_YCRCB_SWAPY); +#if 0 + case PIPE_FORMAT_RGB_FXT1: + case PIPE_FORMAT_RGBA_FXT1: + return (MAPSURF_COMPRESSED | MT_COMPRESS_FXT1); +#endif + case PIPE_FORMAT_Z16_UNORM: + return (MAPSURF_16BIT | MT_16BIT_L16); +#if 0 + case PIPE_FORMAT_RGBA_DXT1: + case PIPE_FORMAT_RGB_DXT1: + return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT1); + case PIPE_FORMAT_RGBA_DXT3: + return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT2_3); + case PIPE_FORMAT_RGBA_DXT5: + return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT4_5); +#endif + case PIPE_FORMAT_S8Z24_UNORM: + return (MAPSURF_32BIT | MT_32BIT_xI824); + default: + debug_printf("i915: translate_texture_format() bad image format %x\n", + pipeFormat); + assert(0); + return 0; + } +} + + +static void +i915_update_texture(struct i915_context *i915, + uint unit, + const struct i915_texture *tex, + const struct i915_sampler_state *sampler, + uint state[6]) +{ + const struct pipe_texture *pt = &tex->base; + uint format, pitch; + const uint width = pt->width[0], height = pt->height[0], depth = pt->depth[0]; + const uint num_levels = pt->last_level; + unsigned max_lod = num_levels * 4; + unsigned tiled = MS3_USE_FENCE_REGS; + + assert(tex); + assert(width); + assert(height); + assert(depth); + + format = translate_texture_format(pt->format); + pitch = tex->stride; + + assert(format); + assert(pitch); + + if (tex->tiled) { + assert(!((pitch - 1) & pitch)); + tiled = MS3_TILED_SURFACE; + } + + /* MS3 state */ + state[0] = + (((height - 1) << MS3_HEIGHT_SHIFT) + | ((width - 1) << MS3_WIDTH_SHIFT) + | format + | tiled); + + /* + * XXX When min_filter != mag_filter and there's just one mipmap level, + * set max_lod = 1 to make sure i915 chooses between min/mag filtering. + */ + + /* See note at the top of file */ + if (max_lod > (sampler->maxlod >> 2)) + max_lod = sampler->maxlod >> 2; + + /* MS4 state */ + state[1] = + ((((pitch / 4) - 1) << MS4_PITCH_SHIFT) + | MS4_CUBE_FACE_ENA_MASK + | ((max_lod) << MS4_MAX_LOD_SHIFT) + | ((depth - 1) << MS4_VOLUME_DEPTH_SHIFT)); +} + + +void +i915_update_textures(struct i915_context *i915) +{ + uint unit; + + for (unit = 0; unit < i915->num_textures && unit < i915->num_samplers; + unit++) { + /* determine unit enable/disable by looking for a bound texture */ + /* could also examine the fragment program? */ + if (i915->texture[unit]) { + i915_update_texture( i915, + unit, + i915->texture[unit], /* texture */ + i915->sampler[unit], /* sampler state */ + i915->current.texbuffer[unit] ); + } + } + + i915->hardware_dirty |= I915_HW_MAP; +} |