diff options
Diffstat (limited to 'src/gallium/drivers/i965/brw_pipe_sampler.c')
| -rw-r--r-- | src/gallium/drivers/i965/brw_pipe_sampler.c | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/src/gallium/drivers/i965/brw_pipe_sampler.c b/src/gallium/drivers/i965/brw_pipe_sampler.c new file mode 100644 index 00000000000..81712798a5d --- /dev/null +++ b/src/gallium/drivers/i965/brw_pipe_sampler.c @@ -0,0 +1,231 @@ + +#include "util/u_memory.h" +#include "util/u_math.h" + +#include "pipe/p_context.h" +#include "pipe/p_state.h" + +#include "brw_context.h" +#include "brw_defines.h" +#include "brw_debug.h" + + + +/* The brw (and related graphics cores) do not support GL_CLAMP. The + * Intel drivers for "other operating systems" implement GL_CLAMP as + * GL_CLAMP_TO_EDGE, so the same is done here. + */ +static GLuint translate_wrap_mode( unsigned wrap ) +{ + switch( wrap ) { + case PIPE_TEX_WRAP_REPEAT: + return BRW_TEXCOORDMODE_WRAP; + + case PIPE_TEX_WRAP_CLAMP: + case PIPE_TEX_WRAP_CLAMP_TO_EDGE: + return BRW_TEXCOORDMODE_CLAMP; + + case PIPE_TEX_WRAP_CLAMP_TO_BORDER: + return BRW_TEXCOORDMODE_CLAMP_BORDER; + + case PIPE_TEX_WRAP_MIRROR_REPEAT: + return BRW_TEXCOORDMODE_MIRROR; + + case PIPE_TEX_WRAP_MIRROR_CLAMP: + case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE: + case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER: + return BRW_TEXCOORDMODE_MIRROR_ONCE; + + default: + return BRW_TEXCOORDMODE_WRAP; + } +} + +static GLuint translate_img_filter( unsigned filter ) +{ + switch (filter) { + case PIPE_TEX_FILTER_NEAREST: + return BRW_MAPFILTER_NEAREST; + case PIPE_TEX_FILTER_LINEAR: + return BRW_MAPFILTER_LINEAR; + default: + assert(0); + return BRW_MAPFILTER_NEAREST; + } +} + +static GLuint translate_mip_filter( unsigned filter ) +{ + switch (filter) { + case PIPE_TEX_MIPFILTER_NONE: + return BRW_MIPFILTER_NONE; + case PIPE_TEX_MIPFILTER_NEAREST: + return BRW_MIPFILTER_NEAREST; + case PIPE_TEX_MIPFILTER_LINEAR: + return BRW_MIPFILTER_LINEAR; + default: + assert(0); + return BRW_MIPFILTER_NONE; + } +} + +/* XXX: not sure why there are special translations for the shadow tex + * compare functions. In particular ALWAYS is translated to NEVER. + * Is this a hardware issue? Does i965 really suffer from this? + */ +static GLuint translate_shadow_compare_func( unsigned func ) +{ + switch (func) { + case PIPE_FUNC_NEVER: + return BRW_COMPAREFUNCTION_ALWAYS; + case PIPE_FUNC_LESS: + return BRW_COMPAREFUNCTION_LEQUAL; + case PIPE_FUNC_LEQUAL: + return BRW_COMPAREFUNCTION_LESS; + case PIPE_FUNC_GREATER: + return BRW_COMPAREFUNCTION_GEQUAL; + case PIPE_FUNC_GEQUAL: + return BRW_COMPAREFUNCTION_GREATER; + case PIPE_FUNC_NOTEQUAL: + return BRW_COMPAREFUNCTION_EQUAL; + case PIPE_FUNC_EQUAL: + return BRW_COMPAREFUNCTION_NOTEQUAL; + case PIPE_FUNC_ALWAYS: + return BRW_COMPAREFUNCTION_NEVER; + default: + assert(0); + return BRW_COMPAREFUNCTION_NEVER; + } +} + + + + +static void * +brw_create_sampler_state( struct pipe_context *pipe, + const struct pipe_sampler_state *template ) +{ + struct brw_sampler *sampler = CALLOC_STRUCT(brw_sampler); + + sampler->ss0.min_filter = translate_img_filter( template->min_img_filter ); + sampler->ss0.mag_filter = translate_img_filter( template->mag_img_filter ); + sampler->ss0.mip_filter = translate_mip_filter( template->min_mip_filter ); + + + /* XXX: anisotropy logic slightly changed: + */ + if (template->max_anisotropy > 1.0) { + sampler->ss0.min_filter = BRW_MAPFILTER_ANISOTROPIC; + sampler->ss0.mag_filter = BRW_MAPFILTER_ANISOTROPIC; + + if (template->max_anisotropy > 2.0) { + sampler->ss3.max_aniso = MIN2((template->max_anisotropy - 2) / 2, + BRW_ANISORATIO_16); + } + } + + sampler->ss1.r_wrap_mode = translate_wrap_mode(template->wrap_r); + sampler->ss1.s_wrap_mode = translate_wrap_mode(template->wrap_s); + sampler->ss1.t_wrap_mode = translate_wrap_mode(template->wrap_t); + + /* Set LOD bias: + */ + sampler->ss0.lod_bias = + util_signed_fixed(CLAMP(template->lod_bias, -16, 15), 6); + + + sampler->ss0.lod_preclamp = 1; /* OpenGL mode */ + sampler->ss0.default_color_mode = 0; /* OpenGL/DX10 mode */ + + /* Set shadow function: + */ + if (template->compare_mode == PIPE_TEX_COMPARE_R_TO_TEXTURE) { + + /* Shadowing is "enabled" by emitting a particular sampler + * message (sample_c). So need to recompile WM program when + * shadow comparison is enabled on each/any texture unit. + */ + sampler->ss0.shadow_function = + translate_shadow_compare_func(template->compare_func); + } + + /* Set BaseMipLevel, MaxLOD, MinLOD: + */ + sampler->ss0.base_level = + util_unsigned_fixed(0, 1); + + sampler->ss1.max_lod = + util_unsigned_fixed(CLAMP(template->max_lod, 0, 13), 6); + + sampler->ss1.min_lod = + util_unsigned_fixed(CLAMP(template->min_lod, 0, 13), 6); + + return (void *)sampler; +} + +static void brw_bind_sampler_state(struct pipe_context *pipe, + unsigned num, void **sampler) +{ + struct brw_context *brw = brw_context(pipe); + int i; + + for (i = 0; i < num; i++) + brw->curr.sampler[i] = sampler[i]; + + for (i = num; i < brw->curr.num_samplers; i++) + brw->curr.sampler[i] = NULL; + + brw->curr.num_samplers = num; + brw->state.dirty.mesa |= PIPE_NEW_SAMPLERS; +} + +static void brw_delete_sampler_state(struct pipe_context *pipe, + void *cso) +{ + FREE(cso); +} + +static void brw_set_sampler_textures(struct pipe_context *pipe, + unsigned num, + struct pipe_texture **texture) +{ + struct brw_context *brw = brw_context(pipe); + int i; + + for (i = 0; i < num; i++) + pipe_texture_reference(&brw->curr.texture[i], texture[i]); + + for (i = num; i < brw->curr.num_textures; i++) + pipe_texture_reference(&brw->curr.texture[i], NULL); + + brw->curr.num_textures = num; + brw->state.dirty.mesa |= PIPE_NEW_BOUND_TEXTURES; +} + +static void brw_set_vertex_sampler_textures(struct pipe_context *pipe, + unsigned num, + struct pipe_texture **texture) +{ +} + +static void brw_bind_vertex_sampler_state(struct pipe_context *pipe, + unsigned num, void **sampler) +{ +} + + +void brw_pipe_sampler_init( struct brw_context *brw ) +{ + brw->base.create_sampler_state = brw_create_sampler_state; + brw->base.delete_sampler_state = brw_delete_sampler_state; + + brw->base.set_fragment_sampler_textures = brw_set_sampler_textures; + brw->base.bind_fragment_sampler_states = brw_bind_sampler_state; + + brw->base.set_vertex_sampler_textures = brw_set_vertex_sampler_textures; + brw->base.bind_vertex_sampler_states = brw_bind_vertex_sampler_state; + +} +void brw_pipe_sampler_cleanup( struct brw_context *brw ) +{ +} |