st/mesa: implement ASTC 2D LDR fallback for all drivers

Tested-by: Mike Lothian <mike@fireburn.co.uk>
Tested-By: Gert Wollny<gert.wollny@collabora.com>
Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>
Reviewed-By: Gert Wollny <gw.fossdev@gmail.com>

src/mesa/state_tracker/st_cb_texture.c

@@ -41,6 +41,7 @@
 #include "main/pbo.h"
 #include "main/pixeltransfer.h"
 #include "main/texcompress.h"
+#include "main/texcompress_astc.h"
 #include "main/texcompress_etc.h"
 #include "main/texgetimage.h"
 #include "main/teximage.h"
@@ -227,6 +228,9 @@ st_compressed_format_fallback(struct st_context *st, mesa_format format)
    if (_mesa_is_format_etc2(format))
       return !st->has_etc2;
 
+   if (_mesa_is_format_astc_2d(format))
+      return !st->has_astc_2d_ldr;
+
    return false;
 }
 
@@ -337,14 +341,20 @@ st_UnmapTextureImage(struct gl_context *ctx,
                                        itransfer->temp_data,
                                        itransfer->temp_stride,
                                        transfer->box.width, transfer->box.height);
-         }
+         } else if (_mesa_is_format_etc2(texImage->TexFormat)) {
-         else {
 	    bool bgra = stImage->pt->format == PIPE_FORMAT_B8G8R8A8_SRGB;
             _mesa_unpack_etc2_format(itransfer->map, transfer->stride,
                                      itransfer->temp_data, itransfer->temp_stride,
                                      transfer->box.width, transfer->box.height,
 				     texImage->TexFormat,
 				     bgra);
+         } else if (_mesa_is_format_astc_2d(texImage->TexFormat)) {
+            _mesa_unpack_astc_2d_ldr(itransfer->map, transfer->stride,
+                                     itransfer->temp_data, itransfer->temp_stride,
+                                     transfer->box.width, transfer->box.height,
+                                     texImage->TexFormat);
+         } else {
+            unreachable("unexpected format for a compressed format fallback");
          }
       }
 
@@ -1415,6 +1425,7 @@ st_TexSubImage(struct gl_context *ctx, GLuint dims,
       dst_level = texImage->TexObject->MinLevel + texImage->Level;
 
    assert(!_mesa_is_format_etc2(texImage->TexFormat) &&
+          !_mesa_is_format_astc_2d(texImage->TexFormat) &&
           texImage->TexFormat != MESA_FORMAT_ETC1_RGB8);
 
    if (!dst)
@@ -1875,6 +1886,7 @@ st_GetTexSubImage(struct gl_context * ctx,
    boolean done = FALSE;
 
    assert(!_mesa_is_format_etc2(texImage->TexFormat) &&
+          !_mesa_is_format_astc_2d(texImage->TexFormat) &&
           texImage->TexFormat != MESA_FORMAT_ETC1_RGB8);
 
    st_flush_bitmap_cache(st);
@@ -2392,6 +2404,7 @@ st_CopyTexSubImage(struct gl_context *ctx, GLuint dims,
    st_invalidate_readpix_cache(st);
 
    assert(!_mesa_is_format_etc2(texImage->TexFormat) &&
+          !_mesa_is_format_astc_2d(texImage->TexFormat) &&
           texImage->TexFormat != MESA_FORMAT_ETC1_RGB8);
 
    if (!strb || !strb->surface || !stImage->pt) {

src/mesa/state_tracker/st_context.c

@@ -438,6 +438,9 @@ st_create_context_priv(struct gl_context *ctx, struct pipe_context *pipe,
    st->has_etc2 = screen->is_format_supported(screen, PIPE_FORMAT_ETC2_RGB8,
                                               PIPE_TEXTURE_2D, 0,
                                               PIPE_BIND_SAMPLER_VIEW);
+   st->has_astc_2d_ldr =
+      screen->is_format_supported(screen, PIPE_FORMAT_ASTC_4x4_SRGB,
+                                  PIPE_TEXTURE_2D, 0, PIPE_BIND_SAMPLER_VIEW);
    st->prefer_blit_based_texture_transfer = screen->get_param(screen,
                               PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER);
    st->force_persample_in_shader =

src/mesa/state_tracker/st_context.h

@@ -120,6 +120,7 @@ struct st_context
    boolean has_shader_model3;
    boolean has_etc1;
    boolean has_etc2;
+   boolean has_astc_2d_ldr;
    boolean prefer_blit_based_texture_transfer;
    boolean force_persample_in_shader;
    boolean has_shareable_shaders;

src/mesa/state_tracker/st_extensions.c

@@ -802,6 +802,11 @@ void st_init_extensions(struct pipe_screen *screen,
           PIPE_FORMAT_ASTC_12x10_SRGB,
           PIPE_FORMAT_ASTC_12x12_SRGB } },
 
+      /* ASTC software fallback support. */
+      { { o(KHR_texture_compression_astc_ldr) },
+        { PIPE_FORMAT_R8G8B8A8_UNORM,
+          PIPE_FORMAT_R8G8B8A8_SRGB } },
+
       { { o(EXT_texture_shared_exponent) },
         { PIPE_FORMAT_R9G9B9E5_FLOAT } },
 

src/mesa/state_tracker/st_format.c

@@ -487,61 +487,117 @@ st_mesa_format_to_pipe_format(const struct st_context *st,
 	 has_bgra_srgb ? PIPE_FORMAT_B8G8R8A8_SRGB : PIPE_FORMAT_R8G8B8A8_SRGB;
 
    case MESA_FORMAT_RGBA_ASTC_4x4:
+      if (!st->has_astc_2d_ldr)
+         return PIPE_FORMAT_R8G8B8A8_UNORM;
       return PIPE_FORMAT_ASTC_4x4;
    case MESA_FORMAT_RGBA_ASTC_5x4:
+      if (!st->has_astc_2d_ldr)
+         return PIPE_FORMAT_R8G8B8A8_UNORM;
       return PIPE_FORMAT_ASTC_5x4;
    case MESA_FORMAT_RGBA_ASTC_5x5:
+      if (!st->has_astc_2d_ldr)
+         return PIPE_FORMAT_R8G8B8A8_UNORM;
       return PIPE_FORMAT_ASTC_5x5;
    case MESA_FORMAT_RGBA_ASTC_6x5:
+      if (!st->has_astc_2d_ldr)
+         return PIPE_FORMAT_R8G8B8A8_UNORM;
       return PIPE_FORMAT_ASTC_6x5;
    case MESA_FORMAT_RGBA_ASTC_6x6:
+      if (!st->has_astc_2d_ldr)
+         return PIPE_FORMAT_R8G8B8A8_UNORM;
       return PIPE_FORMAT_ASTC_6x6;
    case MESA_FORMAT_RGBA_ASTC_8x5:
+      if (!st->has_astc_2d_ldr)
+         return PIPE_FORMAT_R8G8B8A8_UNORM;
       return PIPE_FORMAT_ASTC_8x5;
    case MESA_FORMAT_RGBA_ASTC_8x6:
+      if (!st->has_astc_2d_ldr)
+         return PIPE_FORMAT_R8G8B8A8_UNORM;
       return PIPE_FORMAT_ASTC_8x6;
    case MESA_FORMAT_RGBA_ASTC_8x8:
+      if (!st->has_astc_2d_ldr)
+         return PIPE_FORMAT_R8G8B8A8_UNORM;
       return PIPE_FORMAT_ASTC_8x8;
    case MESA_FORMAT_RGBA_ASTC_10x5:
+      if (!st->has_astc_2d_ldr)
+         return PIPE_FORMAT_R8G8B8A8_UNORM;
       return PIPE_FORMAT_ASTC_10x5;
    case MESA_FORMAT_RGBA_ASTC_10x6:
+      if (!st->has_astc_2d_ldr)
+         return PIPE_FORMAT_R8G8B8A8_UNORM;
       return PIPE_FORMAT_ASTC_10x6;
    case MESA_FORMAT_RGBA_ASTC_10x8:
+      if (!st->has_astc_2d_ldr)
+         return PIPE_FORMAT_R8G8B8A8_UNORM;
       return PIPE_FORMAT_ASTC_10x8;
    case MESA_FORMAT_RGBA_ASTC_10x10:
+      if (!st->has_astc_2d_ldr)
+         return PIPE_FORMAT_R8G8B8A8_UNORM;
       return PIPE_FORMAT_ASTC_10x10;
    case MESA_FORMAT_RGBA_ASTC_12x10:
+      if (!st->has_astc_2d_ldr)
+         return PIPE_FORMAT_R8G8B8A8_UNORM;
       return PIPE_FORMAT_ASTC_12x10;
    case MESA_FORMAT_RGBA_ASTC_12x12:
+      if (!st->has_astc_2d_ldr)
+         return PIPE_FORMAT_R8G8B8A8_UNORM;
       return PIPE_FORMAT_ASTC_12x12;
 
    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_4x4:
+      if (!st->has_astc_2d_ldr)
+         return PIPE_FORMAT_R8G8B8A8_SRGB;
       return PIPE_FORMAT_ASTC_4x4_SRGB;
    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_5x4:
+      if (!st->has_astc_2d_ldr)
+         return PIPE_FORMAT_R8G8B8A8_SRGB;
       return PIPE_FORMAT_ASTC_5x4_SRGB;
    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_5x5:
+      if (!st->has_astc_2d_ldr)
+         return PIPE_FORMAT_R8G8B8A8_SRGB;
       return PIPE_FORMAT_ASTC_5x5_SRGB;
    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_6x5:
+      if (!st->has_astc_2d_ldr)
+         return PIPE_FORMAT_R8G8B8A8_SRGB;
       return PIPE_FORMAT_ASTC_6x5_SRGB;
    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_6x6:
+      if (!st->has_astc_2d_ldr)
+         return PIPE_FORMAT_R8G8B8A8_SRGB;
       return PIPE_FORMAT_ASTC_6x6_SRGB;
    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_8x5:
+      if (!st->has_astc_2d_ldr)
+         return PIPE_FORMAT_R8G8B8A8_SRGB;
       return PIPE_FORMAT_ASTC_8x5_SRGB;
    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_8x6:
+      if (!st->has_astc_2d_ldr)
+         return PIPE_FORMAT_R8G8B8A8_SRGB;
       return PIPE_FORMAT_ASTC_8x6_SRGB;
    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_8x8:
+      if (!st->has_astc_2d_ldr)
+         return PIPE_FORMAT_R8G8B8A8_SRGB;
       return PIPE_FORMAT_ASTC_8x8_SRGB;
    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_10x5:
+      if (!st->has_astc_2d_ldr)
+         return PIPE_FORMAT_R8G8B8A8_SRGB;
       return PIPE_FORMAT_ASTC_10x5_SRGB;
    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_10x6:
+      if (!st->has_astc_2d_ldr)
+         return PIPE_FORMAT_R8G8B8A8_SRGB;
       return PIPE_FORMAT_ASTC_10x6_SRGB;
    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_10x8:
+      if (!st->has_astc_2d_ldr)
+         return PIPE_FORMAT_R8G8B8A8_SRGB;
       return PIPE_FORMAT_ASTC_10x8_SRGB;
    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_10x10:
+      if (!st->has_astc_2d_ldr)
+         return PIPE_FORMAT_R8G8B8A8_SRGB;
       return PIPE_FORMAT_ASTC_10x10_SRGB;
    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_12x10:
+      if (!st->has_astc_2d_ldr)
+         return PIPE_FORMAT_R8G8B8A8_SRGB;
       return PIPE_FORMAT_ASTC_12x10_SRGB;
    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_12x12:
+      if (!st->has_astc_2d_ldr)
+         return PIPE_FORMAT_R8G8B8A8_SRGB;
       return PIPE_FORMAT_ASTC_12x12_SRGB;
 
    default: