Support array and 3d textures.

lib/writer2.c

@@ -126,15 +126,20 @@ ktxTexture2_setImageFromStream(ktxTexture2* This, ktx_uint32_t level,
 {
     ktx_size_t imageByteLength;
     ktx_size_t imageByteOffset;
+    ktx_error_code_e result;
 
     if (!This || !src)
         return KTX_INVALID_VALUE;
 
     if (!This->pData)
         return KTX_INVALID_OPERATION;
 
-    ktxTexture_GetImageOffset(ktxTexture(This), level, layer, faceSlice,
-                                         &imageByteOffset);
+    result = ktxTexture_GetImageOffset(ktxTexture(This),
+                                       level, layer, faceSlice,
+                                       &imageByteOffset);
+    if (result != KTX_SUCCESS)
+       return result;
+
     imageByteLength = ktxTexture_GetImageSize(ktxTexture(This), level);
 
     if (srcSize != imageByteLength)

tests/testimages/genref

@@ -121,4 +121,8 @@ $toktx --test --encode astc --astc_blk_d 8x6    astc_ldr_8x6_FlightHelmet_baseCo
 $toktx --test --encode astc --astc_blk_d 10x5   astc_ldr_10x5_FlightHelmet_baseColor.ktx2  ../srcimages/FlightHelmet_baseColor.png
 $toktx --test --encode astc --astc_blk_d 8x8    astc_ldr_8x8_FlightHelmet_baseColor.ktx2   ../srcimages/FlightHelmet_baseColor.png
 $toktx --test --encode astc --astc_blk_d 12x10  astc_ldr_12x10_FlightHelmet_baseColor.ktx2 ../srcimages/FlightHelmet_baseColor.png
-$toktx --test --encode astc --astc_blk_d 12x12  astc_ldr_12x12_FlightHelmet_baseColor.ktx2 ../srcimages/FlightHelmet_baseColor.png
+$toktx --test --encode astc --astc_blk_d 12x12  astc_ldr_12x12_FlightHelmet_baseColor.ktx2 ../srcimages/FlightHelmet_baseColor.png
+
+$toktx --test --layers 7 --t2 arraytex_7_reference_u.ktx2 ../srcimages/red16.png ../srcimages/orange16.png ../srcimages/yellow16.png ../srcimages/green16.png ../srcimages/blue16.png ../srcimages/indigo16.png ../srcimages/violet16.png
+$toktx --test --depth 7 --t2 3dtex_7_reference_u.ktx2 ../srcimages/red16.png ../srcimages/orange16.png ../srcimages/yellow16.png ../srcimages/green16.png ../srcimages/blue16.png ../srcimages/indigo16.png ../srcimages/violet16.png
+$toktx --test --layers 7 --genmipmap --t2 arraytex_7_mipmap_reference_u.ktx2 ../srcimages/red16.png ../srcimages/orange16.png ../srcimages/yellow16.png ../srcimages/green16.png ../srcimages/blue16.png ../srcimages/indigo16.png ../srcimages/violet16.png

tests/toktx-tests.cmake

@@ -83,6 +83,14 @@ add_test( NAME toktx-different-colortype-second-file-warning
     WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/testimages
 )
 
+add_test( NAME toktx-depth-layers
+    COMMAND toktx --depth 4 --layers 4 a b c d e
+)
+
+add_test( NAME toktx-depth-genmipmap
+    COMMAND toktx --test --depth 7 --genmipmap --t2 3dtex_7_mipmap_reference_u.ktx2 ../srcimages/red16.png ../srcimages/orange16.png ../srcimages/yellow16.png ../srcimages/green16.png ../srcimages/blue16.png ../srcimages/indigo16.png ../srcimages/violet16.png
+)
+
 set_tests_properties(
     toktx-test-foobar
     toktx-automipmap-mipmaps
@@ -98,6 +106,8 @@ set_tests_properties(
     toktx-invalid-swizzle-char
     toktx-invalid-target-type
     toktx-different-colortype-second-file-error
+    toktx-depth-layers
+    toktx-depth-genmipmap
 PROPERTIES
     WILL_FAIL TRUE
 )
@@ -227,4 +237,7 @@ gencmpktx( astc_ldr_8x6_FlightHelmet_baseColor    astc_ldr_8x6_FlightHelmet_base
 gencmpktx( astc_ldr_10x5_FlightHelmet_baseColor   astc_ldr_10x5_FlightHelmet_baseColor.ktx2  ../srcimages/FlightHelmet_baseColor.png "--test --encode astc --astc_blk_d 10x5" "" "")
 gencmpktx( astc_ldr_8x8_FlightHelmet_baseColor    astc_ldr_8x8_FlightHelmet_baseColor.ktx2   ../srcimages/FlightHelmet_baseColor.png "--test --encode astc --astc_blk_d 8x8" "" "")
 gencmpktx( astc_ldr_12x10_FlightHelmet_baseColor  astc_ldr_12x10_FlightHelmet_baseColor.ktx2 ../srcimages/FlightHelmet_baseColor.png "--test --encode astc --astc_blk_d 12x10" "" "")
-gencmpktx( astc_ldr_12x12_FlightHelmet_baseColor  astc_ldr_12x12_FlightHelmet_baseColor.ktx2 ../srcimages/FlightHelmet_baseColor.png "--test --encode astc --astc_blk_d 12x12" "" "")
+gencmpktx( astc_ldr_12x12_FlightHelmet_baseColor  astc_ldr_12x12_FlightHelmet_baseColor.ktx2 ../srcimages/FlightHelmet_baseColor.png "--test --encode astc --astc_blk_d 12x12" "" "")
+gencmpktx( 3dtex_7_reference_u 3dtex_7_reference_u.ktx2 ../srcimages/red16.png ../srcimages/orange16.png ../srcimages/yellow16.png ../srcimages/green16.png ../srcimages/blue16.png ../srcimages/indigo16.png ../srcimages/violet16.png "--test --t2 --depth 7" "" "")
+gencmpktx( arraytex_7_reference_u arraytex_7_reference_u.ktx2 ../srcimages/red16.png ../srcimages/orange16.png ../srcimages/yellow16.png ../srcimages/green16.png ../srcimages/blue16.png ../srcimages/indigo16.png ../srcimages/violet16.png "--test --t2 --layers 7" "" "")
+gencmpktx( arraytex_7_mipmap_reference_u arraytex_7_mipmap_reference_u.ktx2 ../srcimages/red16.png ../srcimages/orange16.png ../srcimages/yellow16.png ../srcimages/green16.png ../srcimages/blue16.png ../srcimages/indigo16.png ../srcimages/violet16.png "--test --t2 --layers 7 --genmipmap" "" "")

tools/toktx/toktx.cc

@@ -717,9 +717,8 @@ toktxApp::main(int argc, _TCHAR *argv[])
     else
       createInfo.numFaces = 1;
 
-    // TO DO: handle array textures
     createInfo.numLayers = options.layers;
-    createInfo.isArray = KTX_FALSE;
+    createInfo.isArray = options.layers > 1;
 
     // TO DO: handle 3D textures.
 
@@ -1089,7 +1088,11 @@ toktxApp::main(int argc, _TCHAR *argv[])
             createInfo.baseWidth = levelWidth = image->getWidth();
             createInfo.baseHeight = levelHeight = image->getHeight();
             createInfo.baseDepth = levelDepth = options.depth;
-            if (image->getHeight() == 1 && !options.two_d)
+            if (options.depth > 1) {
+                // In this case, don't care about image->getHeight(). Images are
+                // always considered to be 2d. No need to set options.two_d.
+                createInfo.numDimensions = 3;
+            } else if (image->getHeight() == 1 && !options.two_d)
                 createInfo.numDimensions = 1;
             else
                 createInfo.numDimensions = 2;
@@ -1172,6 +1175,7 @@ toktxApp::main(int argc, _TCHAR *argv[])
                 level = 0;
                 levelWidth = createInfo.baseWidth;
                 levelHeight = createInfo.baseHeight;
+                levelDepth = createInfo.baseDepth;
                 if (faceSlice == (options.cubemap ? 6 : levelDepth)) {
                     faceSlice = 0;
                     layer++;
@@ -1198,12 +1202,19 @@ toktxApp::main(int argc, _TCHAR *argv[])
             cout << ", imageSize = " << imageSize << endl;
         }
 #endif
-        ktxTexture_SetImageFromMemory(ktxTexture(texture),
-                                      level,
-                                      layer,
-                                      faceSlice,
-                                      *image,
-                                      image->getByteCount());
+        ret = ktxTexture_SetImageFromMemory(ktxTexture(texture),
+                                            level,
+                                            layer,
+                                            faceSlice,
+                                            *image,
+                                            image->getByteCount());
+        // Only an error in this program could lead to ret != SUCCESS
+        // hence no user message.
+        assert(ret == KTX_SUCCESS);
+
+        // This does not work for mipmaps for 3d textures. For those it is
+        // necessary to present the base images for each slice to a
+        // resampler that can sample across images.
         if (options.genmipmap) {
             for (uint32_t glevel = 1; glevel < createInfo.numLevels; glevel++)
             {
@@ -1230,12 +1241,13 @@ toktxApp::main(int argc, _TCHAR *argv[])
                 //if (options.gmopts.mipRenormalize)
                 //    levelImage->renormalize_normal_map();
 
-                ktxTexture_SetImageFromMemory(ktxTexture(texture),
+                ret = ktxTexture_SetImageFromMemory(ktxTexture(texture),
                                               glevel,
                                               layer,
                                               faceSlice,
                                               *levelImage,
                                               levelImage->getByteCount());
+                assert(ret == KTX_SUCCESS);
                 delete levelImage;
             }
         }
@@ -1255,21 +1267,36 @@ toktxApp::main(int argc, _TCHAR *argv[])
 
     /*
      * Add orientation metadata.
-     * Note: 1D textures and 2D textures with a height of 1 don't need
-     * orientation metadata
      */
-    if (options.metadata && createInfo.baseHeight > 1) {
+    if (options.metadata) {
         ktxHashList* ht = &texture->kvDataHead;
-        char orientation[10];
+        char orientation[20];
         if (options.ktx2) {
             orientation[0] = 'r';
-            orientation[1] = options.lower_left_maps_to_s0t0 ? 'u' : 'd';
-            orientation[2] = 0;
+            if (createInfo.baseHeight > 1) {
+                orientation[1] = options.lower_left_maps_to_s0t0 ? 'u' : 'd';
+                if (createInfo.baseDepth > 1) {
+                    orientation[2] = options.lower_left_maps_to_s0t0
+                                   ? 'o'  : 'i';
+                }
+                else {
+                    orientation[2] = 0;
+                }
+            } else {
+                orientation[1] = 0;
+            }
         } else {
-            assert(strlen(KTX_ORIENTATION2_FMT) < sizeof(orientation));
-
-            snprintf(orientation, sizeof(orientation), KTX_ORIENTATION2_FMT,
-                     'r', options.lower_left_maps_to_s0t0 ? 'u' : 'd');
+            assert(strlen(KTX_ORIENTATION3_FMT) < sizeof(orientation));
+            if (createInfo.baseHeight == 1) {
+                snprintf(orientation, sizeof(orientation), KTX_ORIENTATION1_FMT,
+                         'r');
+            } else if (createInfo.baseDepth == 1) {
+                snprintf(orientation, sizeof(orientation), KTX_ORIENTATION2_FMT,
+                         'r', options.lower_left_maps_to_s0t0 ? 'u' : 'd');
+            } else
+                snprintf(orientation, sizeof(orientation), KTX_ORIENTATION3_FMT,
+                         'r', options.lower_left_maps_to_s0t0 ? 'u' : 'd',
+                         options.lower_left_maps_to_s0t0 ? 'o' : 'i');
         }
         ktxHashList_AddKVPair(ht, KTX_ORIENTATION_KEY,
                               (unsigned int)strlen(orientation) + 1,
@@ -1467,6 +1494,12 @@ toktxApp::validateOptions()
         exit(1);
     }
 
+    if (options.depth > 1 && options.genmipmap) {
+        error("generation of mipmaps for 3d textures is not supported.\n"
+              "A PR to add this feature will be gratefully accepted!");
+        exit(1);
+    }
+
     if (options.outfile.compare(_T("-")) != 0
             && options.outfile.find_last_of('.') == _tstring::npos)
     {