diff options
Diffstat (limited to 'drivers/gles3/storage/texture_storage.cpp')
| -rw-r--r-- | drivers/gles3/storage/texture_storage.cpp | 236 |
1 files changed, 234 insertions, 2 deletions
diff --git a/drivers/gles3/storage/texture_storage.cpp b/drivers/gles3/storage/texture_storage.cpp index 442bd69b55..48f460f995 100644 --- a/drivers/gles3/storage/texture_storage.cpp +++ b/drivers/gles3/storage/texture_storage.cpp @@ -197,6 +197,22 @@ TextureStorage::TextureStorage() { glBindTexture(GL_TEXTURE_2D, 0); + { // Atlas Texture initialize. + uint8_t pixel_data[4 * 4 * 4]; + for (int i = 0; i < 16; i++) { + pixel_data[i * 4 + 0] = 0; + pixel_data[i * 4 + 1] = 0; + pixel_data[i * 4 + 2] = 0; + pixel_data[i * 4 + 3] = 255; + } + + glGenTextures(1, &texture_atlas.texture); + glBindTexture(GL_TEXTURE_2D, texture_atlas.texture); + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 4, 4, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixel_data); + } + + glBindTexture(GL_TEXTURE_2D, 0); + #ifdef GLES_OVER_GL glEnable(GL_PROGRAM_POINT_SIZE); #endif @@ -207,6 +223,11 @@ TextureStorage::~TextureStorage() { for (int i = 0; i < DEFAULT_GL_TEXTURE_MAX; i++) { texture_free(default_gl_textures[i]); } + + glDeleteTextures(1, &texture_atlas.texture); + texture_atlas.texture = 0; + glDeleteFramebuffers(1, &texture_atlas.framebuffer); + texture_atlas.framebuffer = 0; } //TODO, move back to storage @@ -653,7 +674,7 @@ void TextureStorage::texture_free(RID p_texture) { } } - //decal_atlas_remove_texture(p_texture); + texture_atlas_remove_texture(p_texture); for (int i = 0; i < t->proxies.size(); i++) { Texture *p = texture_owner.get_or_null(t->proxies[i]); @@ -875,7 +896,7 @@ void TextureStorage::texture_replace(RID p_texture, RID p_by_texture) { //delete last, so proxies can be updated texture_owner.free(p_by_texture); - //decal_atlas_mark_dirty_on_texture(p_texture); + texture_atlas_mark_dirty_on_texture(p_texture); } void TextureStorage::texture_set_size_override(RID p_texture, int p_width, int p_height) { @@ -1143,6 +1164,217 @@ RID TextureStorage::texture_create_radiance_cubemap(RID p_source, int p_resoluti return RID(); } +/* TEXTURE ATLAS API */ + +void TextureStorage::texture_add_to_texture_atlas(RID p_texture) { + if (!texture_atlas.textures.has(p_texture)) { + TextureAtlas::Texture t; + t.users = 1; + texture_atlas.textures[p_texture] = t; + texture_atlas.dirty = true; + } else { + TextureAtlas::Texture *t = texture_atlas.textures.getptr(p_texture); + t->users++; + } +} + +void TextureStorage::texture_remove_from_texture_atlas(RID p_texture) { + TextureAtlas::Texture *t = texture_atlas.textures.getptr(p_texture); + ERR_FAIL_COND(!t); + t->users--; + if (t->users == 0) { + texture_atlas.textures.erase(p_texture); + // Do not mark it dirty, there is no need to since it remains working. + } +} + +void TextureStorage::texture_atlas_mark_dirty_on_texture(RID p_texture) { + if (texture_atlas.textures.has(p_texture)) { + texture_atlas.dirty = true; // Mark it dirty since it was most likely modified. + } +} + +void TextureStorage::texture_atlas_remove_texture(RID p_texture) { + if (texture_atlas.textures.has(p_texture)) { + texture_atlas.textures.erase(p_texture); + // There is not much a point of making it dirty, texture can be removed next time the atlas is updated. + } +} + +GLuint TextureStorage::texture_atlas_get_texture() const { + return texture_atlas.texture; +} + +void TextureStorage::update_texture_atlas() { + CopyEffects *copy_effects = CopyEffects::get_singleton(); + ERR_FAIL_NULL(copy_effects); + + if (!texture_atlas.dirty) { + return; //nothing to do + } + + texture_atlas.dirty = false; + + if (texture_atlas.texture != 0) { + glDeleteTextures(1, &texture_atlas.texture); + texture_atlas.texture = 0; + glDeleteFramebuffers(1, &texture_atlas.framebuffer); + texture_atlas.framebuffer = 0; + } + + const int border = 2; + + if (texture_atlas.textures.size()) { + //generate atlas + Vector<TextureAtlas::SortItem> itemsv; + itemsv.resize(texture_atlas.textures.size()); + int base_size = 8; + + int idx = 0; + + for (const KeyValue<RID, TextureAtlas::Texture> &E : texture_atlas.textures) { + TextureAtlas::SortItem &si = itemsv.write[idx]; + + Texture *src_tex = get_texture(E.key); + + si.size.width = (src_tex->width / border) + 1; + si.size.height = (src_tex->height / border) + 1; + si.pixel_size = Size2i(src_tex->width, src_tex->height); + + if (base_size < si.size.width) { + base_size = nearest_power_of_2_templated(si.size.width); + } + + si.texture = E.key; + idx++; + } + + //sort items by size + itemsv.sort(); + + //attempt to create atlas + int item_count = itemsv.size(); + TextureAtlas::SortItem *items = itemsv.ptrw(); + + int atlas_height = 0; + + while (true) { + Vector<int> v_offsetsv; + v_offsetsv.resize(base_size); + + int *v_offsets = v_offsetsv.ptrw(); + memset(v_offsets, 0, sizeof(int) * base_size); + + int max_height = 0; + + for (int i = 0; i < item_count; i++) { + //best fit + TextureAtlas::SortItem &si = items[i]; + int best_idx = -1; + int best_height = 0x7FFFFFFF; + for (int j = 0; j <= base_size - si.size.width; j++) { + int height = 0; + for (int k = 0; k < si.size.width; k++) { + int h = v_offsets[k + j]; + if (h > height) { + height = h; + if (height > best_height) { + break; //already bad + } + } + } + + if (height < best_height) { + best_height = height; + best_idx = j; + } + } + + //update + for (int k = 0; k < si.size.width; k++) { + v_offsets[k + best_idx] = best_height + si.size.height; + } + + si.pos.x = best_idx; + si.pos.y = best_height; + + if (si.pos.y + si.size.height > max_height) { + max_height = si.pos.y + si.size.height; + } + } + + if (max_height <= base_size * 2) { + atlas_height = max_height; + break; //good ratio, break; + } + + base_size *= 2; + } + + texture_atlas.size.width = base_size * border; + texture_atlas.size.height = nearest_power_of_2_templated(atlas_height * border); + + for (int i = 0; i < item_count; i++) { + TextureAtlas::Texture *t = texture_atlas.textures.getptr(items[i].texture); + t->uv_rect.position = items[i].pos * border + Vector2i(border / 2, border / 2); + t->uv_rect.size = items[i].pixel_size; + + t->uv_rect.position /= Size2(texture_atlas.size); + t->uv_rect.size /= Size2(texture_atlas.size); + } + } else { + texture_atlas.size.width = 4; + texture_atlas.size.height = 4; + } + + { // Atlas Texture initialize. + // TODO validate texture atlas size with maximum texture size + glGenTextures(1, &texture_atlas.texture); + glActiveTexture(GL_TEXTURE0); + glBindTexture(GL_TEXTURE_2D, texture_atlas.texture); + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, texture_atlas.size.width, texture_atlas.size.height, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr); + + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 1); + + glGenFramebuffers(1, &texture_atlas.framebuffer); + glBindFramebuffer(GL_FRAMEBUFFER, texture_atlas.framebuffer); + glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture_atlas.texture, 0); + + GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER); + + if (status != GL_FRAMEBUFFER_COMPLETE) { + glDeleteFramebuffers(1, &texture_atlas.framebuffer); + texture_atlas.framebuffer = 0; + glDeleteTextures(1, &texture_atlas.texture); + texture_atlas.texture = 0; + WARN_PRINT("Could not create texture atlas, status: " + get_framebuffer_error(status)); + return; + } + glViewport(0, 0, texture_atlas.size.width, texture_atlas.size.height); + glClearColor(0.0, 0.0, 0.0, 0.0); + glClear(GL_COLOR_BUFFER_BIT); + glBindTexture(GL_TEXTURE_2D, 0); + } + + glDisable(GL_BLEND); + + if (texture_atlas.textures.size()) { + for (const KeyValue<RID, TextureAtlas::Texture> &E : texture_atlas.textures) { + TextureAtlas::Texture *t = texture_atlas.textures.getptr(E.key); + Texture *src_tex = get_texture(E.key); + glActiveTexture(GL_TEXTURE0); + glBindTexture(GL_TEXTURE_2D, src_tex->tex_id); + copy_effects->copy_to_rect(t->uv_rect); + } + } + glBindFramebuffer(GL_FRAMEBUFFER, 0); +} + /* DECAL API */ RID TextureStorage::decal_allocate() { |