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gallium: Add util_gen_mipmap_filter().

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We need a way to specify the type of minification filter
used to downsample mipmap levels.
The old util_gen_mipmap() retains its behaviour and uses
LINEAR filter.
This commit is contained in:
Michal Krol 2008-03-23 20:39:35 +01:00
parent 38dc0f809d
commit 6edaef5318
2 changed files with 28 additions and 4 deletions
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27
src/gallium/auxiliary/util/u_gen_mipmap.c
View file

@ -719,7 +719,6 @@ util_create_gen_mipmap(struct pipe_context *pipe,
ctx->sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
ctx->sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
ctx->sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NEAREST;
ctx->sampler.min_img_filter = PIPE_TEX_FILTER_LINEAR;
ctx->sampler.mag_img_filter = PIPE_TEX_FILTER_LINEAR;
ctx->sampler.normalized_coords = 1;
@ -849,11 +848,12 @@ simple_viewport(struct pipe_context *pipe, uint width, uint height)
* \param face which cube face to generate mipmaps for (0 for non-cube maps)
* \param baseLevel the first mipmap level to use as a src
* \param lastLevel the last mipmap level to generate
* \param filter the minification filter used to generate mipmap levels with
*/
void
util_gen_mipmap(struct gen_mipmap_state *ctx,
struct pipe_texture *pt,
uint face, uint baseLevel, uint lastLevel)
util_gen_mipmap_filter(struct gen_mipmap_state *ctx,
struct pipe_texture *pt,
uint face, uint baseLevel, uint lastLevel, uint filter)
{
struct pipe_context *pipe = ctx->pipe;
struct pipe_screen *screen = pipe->screen;
@ -914,6 +914,7 @@ util_gen_mipmap(struct gen_mipmap_state *ctx,
*/
ctx->sampler.min_lod = ctx->sampler.max_lod = (float) srcLevel;
ctx->sampler.lod_bias = (float) srcLevel;
ctx->sampler.min_img_filter = filter;
cso_single_sampler(ctx->cso, 0, &ctx->sampler);
cso_single_sampler_done(ctx->cso);
#if 0
@ -945,3 +946,21 @@ util_gen_mipmap(struct gen_mipmap_state *ctx,
cso_restore_sampler_textures(ctx->cso);
cso_restore_framebuffer(ctx->cso);
}
/**
* Generate mipmap images with a linear minification filter.
* See util_gen_mipmap_filter for more info.
*
* \param pt the texture to generate mipmap levels for
* \param face which cube face to generate mipmaps for (0 for non-cube maps)
* \param baseLevel the first mipmap level to use as a src
* \param lastLevel the last mipmap level to generate
*/
void
util_gen_mipmap(struct gen_mipmap_state *ctx,
struct pipe_texture *pt,
uint face, uint baseLevel, uint lastLevel)
{
util_gen_mipmap_filter( ctx, pt, face, baseLevel, lastLevel, PIPE_TEX_FILTER_LINEAR );
}

5
src/gallium/auxiliary/util/u_gen_mipmap.h
View file

@ -52,5 +52,10 @@ util_gen_mipmap(struct gen_mipmap_state *ctx,
struct pipe_texture *pt,
uint face, uint baseLevel, uint lastLevel);
extern void
util_gen_mipmap_filter(struct gen_mipmap_state *ctx,
struct pipe_texture *pt,
uint face, uint baseLevel, uint lastLevel, uint filter);
#endif