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gallium/hud: use sRGB for nicer AA lines

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Reviewed-by: Brian Paul <brianp@vmware.com>
This commit is contained in:
Marek Olšák
2016-08-17 18:27:48 +02:00
parent 6ffde82083
commit b9c9551c09
1 changed files with 21 additions and 0 deletions
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21
src/gallium/auxiliary/hud/hud_context.c
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@@ -42,6 +42,7 @@
#include "cso_cache/cso_context.h" #include "cso_cache/cso_context.h"
#include "util/u_draw_quad.h" #include "util/u_draw_quad.h"
#include "util/u_format.h"
#include "util/u_inlines.h" #include "util/u_inlines.h"
#include "util/u_memory.h" #include "util/u_memory.h"
#include "util/u_math.h" #include "util/u_math.h"
@@ -97,6 +98,8 @@ struct hud_context {
unsigned max_num_vertices; unsigned max_num_vertices;
unsigned num_vertices; unsigned num_vertices;
} text, bg, whitelines; } text, bg, whitelines;
bool has_srgb;
}; };
#ifdef PIPE_OS_UNIX #ifdef PIPE_OS_UNIX
@@ -484,6 +487,18 @@ hud_draw(struct hud_context *hud, struct pipe_resource *tex)
/* set states */ /* set states */
memset(&surf_templ, 0, sizeof(surf_templ)); memset(&surf_templ, 0, sizeof(surf_templ));
surf_templ.format = tex->format; surf_templ.format = tex->format;
/* Without this, AA lines look thinner if they are between 2 pixels
* because the alpha is 0.5 on both pixels. (it's ugly)
*
* sRGB makes the width of all AA lines look the same.
*/
if (hud->has_srgb) {
enum pipe_format srgb_format = util_format_srgb(tex->format);
if (srgb_format != PIPE_FORMAT_NONE)
surf_templ.format = srgb_format;
}
surf = pipe->create_surface(pipe, tex, &surf_templ); surf = pipe->create_surface(pipe, tex, &surf_templ);
memset(&fb, 0, sizeof(fb)); memset(&fb, 0, sizeof(fb));
@@ -1138,6 +1153,7 @@ print_help(struct pipe_screen *screen)
struct hud_context * struct hud_context *
hud_create(struct pipe_context *pipe, struct cso_context *cso) hud_create(struct pipe_context *pipe, struct cso_context *cso)
{ {
struct pipe_screen *screen = pipe->screen;
struct hud_context *hud; struct hud_context *hud;
struct pipe_sampler_view view_templ; struct pipe_sampler_view view_templ;
unsigned i; unsigned i;
@@ -1173,6 +1189,11 @@ hud_create(struct pipe_context *pipe, struct cso_context *cso)
return NULL; return NULL;
} }
hud->has_srgb = screen->is_format_supported(screen,
PIPE_FORMAT_B8G8R8A8_SRGB,
PIPE_TEXTURE_2D, 0,
PIPE_BIND_RENDER_TARGET) != 0;
/* blend state */ /* blend state */
hud->no_blend.rt[0].colormask = PIPE_MASK_RGBA; hud->no_blend.rt[0].colormask = PIPE_MASK_RGBA;