Texture:replacePixels supports mipmap;

src/api/graphics.c

@@ -1112,7 +1112,7 @@ int l_lovrGraphicsNewTexture(lua_State* L) {
   for (int i = 0; i < depth; i++) {
     lua_rawgeti(L, 1, i + 1);
     TextureData* textureData = luax_checktexturedata(L, -1);
-    lovrTextureReplacePixels(texture, textureData, 0, 0, i);
+    lovrTextureReplacePixels(texture, textureData, 0, 0, i, 0);
     lovrRelease(textureData);
     lua_pop(L, 1);
   }

src/api/types/texture.c

@@ -76,8 +76,9 @@ int l_lovrTextureReplacePixels(lua_State* L) {
   TextureData* textureData = luax_checktype(L, 2, TextureData);
   int x = luaL_optinteger(L, 3, 0);
   int y = luaL_optinteger(L, 4, 0);
-  int slice = luaL_optinteger(L, 5, 1);
-  lovrTextureReplacePixels(texture, textureData, x, y, slice - 1);
+  int slice = luaL_optinteger(L, 5, 1) - 1;
+  int mipmap = luaL_optinteger(L, 6, 1) - 1;
+  lovrTextureReplacePixels(texture, textureData, x, y, slice, mipmap);
   return 0;
 }
 

src/graphics/font.c

@@ -275,7 +275,7 @@ void lovrFontAddGlyph(Font* font, Glyph* glyph) {
   glyph->y = atlas->y;
 
   // Paste glyph into texture
-  lovrTextureReplacePixels(font->texture, glyph->data, atlas->x, atlas->y, 0);
+  lovrTextureReplacePixels(font->texture, glyph->data, atlas->x, atlas->y, 0, 0);
 
   // Advance atlas cursor
   atlas->x += glyph->tw + atlas->padding;

src/graphics/opengl.c

@@ -889,7 +889,7 @@ Texture* lovrTextureCreate(TextureType type, TextureData** slices, int depth, bo
 
   if (slices) {
     for (int i = 0; i < depth; i++) {
-      lovrTextureReplacePixels(texture, slices[i], 0, 0, i);
+      lovrTextureReplacePixels(texture, slices[i], 0, 0, i, 0);
     }
   }
 
@@ -930,7 +930,7 @@ TextureType lovrTextureGetType(Texture* texture) {
   return texture->type;
 }
 
-void lovrTextureReplacePixels(Texture* texture, TextureData* textureData, int x, int y, int slice) {
+void lovrTextureReplacePixels(Texture* texture, TextureData* textureData, int x, int y, int slice, int mipmap) {
   lovrRetain(textureData);
   lovrRelease(texture->slices[slice]);
   texture->slices[slice] = textureData;
@@ -939,20 +939,24 @@ void lovrTextureReplacePixels(Texture* texture, TextureData* textureData, int x,
   if (!texture->allocated) {
     lovrAssert(texture->type != TEXTURE_CUBE || textureData->width == textureData->height, "Cubemap images must be square");
     lovrTextureAllocate(texture, textureData);
-  } else {
-    bool overflow = (x + textureData->width > texture->width) || (y + textureData->height > texture->height);
-    lovrAssert(!overflow, "Trying to replace pixels outside the texture's bounds");
   }
 
   if (!textureData->blob.data) {
     return;
   }
 
+  int width = lovrTextureGetWidth(texture, mipmap);
+  int height = lovrTextureGetHeight(texture, mipmap);
+  bool overflow = (x + textureData->width > width) || (y + textureData->height > height);
+  lovrAssert(!overflow, "Trying to replace pixels outside the texture's bounds");
+  lovrAssert(mipmap >= 0 && mipmap < texture->mipmapCount, "Invalid mipmap level %d", mipmap);
   GLenum glFormat = convertTextureFormat(textureData->format);
   GLenum glInternalFormat = convertTextureFormatInternal(textureData->format, texture->srgb);
   GLenum binding = (texture->type == TEXTURE_CUBE) ? GL_TEXTURE_CUBE_MAP_POSITIVE_X + slice : texture->glType;
 
   if (isTextureFormatCompressed(textureData->format)) {
+    lovrAssert(width == textureData->width && height == textureData->height, "Compressed texture pixels must be fully replaced");
+    lovrAssert(mipmap == 0, "Unable to replace a specific mipmap of a compressed texture");
     Mipmap m; int i;
     vec_foreach(&textureData->mipmaps, m, i) {
       switch (texture->type) {
@@ -970,11 +974,11 @@ void lovrTextureReplacePixels(Texture* texture, TextureData* textureData, int x,
     switch (texture->type) {
       case TEXTURE_2D:
       case TEXTURE_CUBE:
-        glTexSubImage2D(binding, 0, x, y, textureData->width, textureData->height, glFormat, GL_UNSIGNED_BYTE, textureData->blob.data);
+        glTexSubImage2D(binding, mipmap, x, y, textureData->width, textureData->height, glFormat, GL_UNSIGNED_BYTE, textureData->blob.data);
         break;
       case TEXTURE_ARRAY:
       case TEXTURE_VOLUME:
-        glTexSubImage3D(binding, 0, x, y, slice, textureData->width, textureData->height, 1, glFormat, GL_UNSIGNED_BYTE, textureData->blob.data);
+        glTexSubImage3D(binding, mipmap, x, y, slice, textureData->width, textureData->height, 1, glFormat, GL_UNSIGNED_BYTE, textureData->blob.data);
         break;
     }
 

src/graphics/texture.h

@@ -44,7 +44,7 @@ int lovrTextureGetHeight(Texture* texture, int mipmap);
 int lovrTextureGetDepth(Texture* texture, int mipmap);
 int lovrTextureGetMipmapCount(Texture* texture);
 TextureType lovrTextureGetType(Texture* texture);
-void lovrTextureReplacePixels(Texture* texture, TextureData* data, int x, int y, int slice);
+void lovrTextureReplacePixels(Texture* texture, TextureData* data, int x, int y, int slice, int mipmap);
 TextureFilter lovrTextureGetFilter(Texture* texture);
 void lovrTextureSetFilter(Texture* texture, TextureFilter filter);
 TextureWrap lovrTextureGetWrap(Texture* texture);