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-rw-r--r--indra/llrender/CMakeLists.txt2
-rw-r--r--indra/llrender/llfontfreetype.cpp13
-rw-r--r--indra/llrender/llfontfreetypesvg.cpp205
-rw-r--r--indra/llrender/llfontfreetypesvg.h54
4 files changed, 274 insertions, 0 deletions
diff --git a/indra/llrender/CMakeLists.txt b/indra/llrender/CMakeLists.txt
index 47e7ad915b..282a5c70ad 100644
--- a/indra/llrender/CMakeLists.txt
+++ b/indra/llrender/CMakeLists.txt
@@ -35,6 +35,7 @@ set(llrender_SOURCE_FILES
llcubemap.cpp
llfontbitmapcache.cpp
llfontfreetype.cpp
+ llfontfreetypesvg.cpp
llfontgl.cpp
llfontregistry.cpp
llgl.cpp
@@ -62,6 +63,7 @@ set(llrender_HEADER_FILES
llcubemap.h
llfontgl.h
llfontfreetype.h
+ llfontfreetypesvg.h
llfontbitmapcache.h
llfontregistry.h
llgl.h
diff --git a/indra/llrender/llfontfreetype.cpp b/indra/llrender/llfontfreetype.cpp
index 25740a5f87..d3a49339da 100644
--- a/indra/llrender/llfontfreetype.cpp
+++ b/indra/llrender/llfontfreetype.cpp
@@ -34,6 +34,7 @@
#ifdef LL_WINDOWS
#include <freetype2\freetype\ftsystem.h>
#endif
+#include "llfontfreetypesvg.h"
// For some reason, this won't work if it's not wrapped in the ifdef
#ifdef FT_FREETYPE_H
@@ -51,6 +52,8 @@
#include "llfontbitmapcache.h"
#include "llgl.h"
+#define ENABLE_OT_SVG_SUPPORT
+
FT_Render_Mode gFontRenderMode = FT_RENDER_MODE_NORMAL;
LLFontManager *gFontManagerp = NULL;
@@ -83,6 +86,16 @@ LLFontManager::LLFontManager()
LL_ERRS() << "Freetype initialization failure!" << LL_ENDL;
FT_Done_FreeType(gFTLibrary);
}
+
+#ifdef ENABLE_OT_SVG_SUPPORT
+ SVG_RendererHooks hooks = {
+ LLFontFreeTypeSvgRenderer::OnInit,
+ LLFontFreeTypeSvgRenderer::OnFree,
+ LLFontFreeTypeSvgRenderer::OnRender,
+ LLFontFreeTypeSvgRenderer::OnPresetGlypthSlot,
+ };
+ FT_Property_Set(gFTLibrary, "ot-svg", "svg-hooks", &hooks);
+#endif
}
LLFontManager::~LLFontManager()
diff --git a/indra/llrender/llfontfreetypesvg.cpp b/indra/llrender/llfontfreetypesvg.cpp
new file mode 100644
index 0000000000..19d327a4c9
--- /dev/null
+++ b/indra/llrender/llfontfreetypesvg.cpp
@@ -0,0 +1,205 @@
+/**
+ * @file llfontfreetypesvg.cpp
+ * @brief Freetype font library SVG glyph rendering
+ *
+ * $LicenseInfo:firstyear=2002&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+
+#include "llfontfreetypesvg.h"
+
+#if LL_WINDOWS
+#pragma warning (push)
+#pragma warning (disable : 4702)
+#endif
+
+#define NANOSVG_IMPLEMENTATION
+#include <nanosvg/nanosvg.h>
+#define NANOSVGRAST_IMPLEMENTATION
+#include <nanosvg/nanosvgrast.h>
+
+#if LL_WINDOWS
+#pragma warning (pop)
+#endif
+
+struct LLSvgRenderData
+{
+ FT_UInt GlyphIndex = 0;
+ FT_Error Error = FT_Err_Ok; // FreeType currently (@2.12.1) ignores the error value returned by the preset glyph slot callback so we return it at render time
+ // (See https://github.com/freetype/freetype/blob/5faa1df8b93ebecf0f8fd5fe8fda7b9082eddced/src/base/ftobjs.c#L1170)
+ NSVGimage* pNSvgImage = nullptr;
+ float Scale = 0.f;
+};
+
+// static
+FT_Error LLFontFreeTypeSvgRenderer::OnInit(FT_Pointer* state)
+{
+ // The SVG driver hook state is shared across all callback invocations; since our state is lightweight
+ // we store it in the glyph instead.
+ *state = nullptr;
+
+ return FT_Err_Ok;
+}
+
+// static
+void LLFontFreeTypeSvgRenderer::OnFree(FT_Pointer* state)
+{
+}
+
+// static
+void LLFontFreeTypeSvgRenderer::OnDataFinalizer(void* objectp)
+{
+ FT_GlyphSlot glyph_slot = static_cast<FT_GlyphSlot>(objectp);
+
+ LLSvgRenderData* pData = static_cast<LLSvgRenderData*>(glyph_slot->generic.data);
+ glyph_slot->generic.data = nullptr;
+ glyph_slot->generic.finalizer = nullptr;
+ delete(pData);
+}
+
+//static
+FT_Error LLFontFreeTypeSvgRenderer::OnPresetGlypthSlot(FT_GlyphSlot glyph_slot, FT_Bool cache, FT_Pointer*)
+{
+ FT_SVG_Document document = static_cast<FT_SVG_Document>(glyph_slot->other);
+
+ llassert(!glyph_slot->generic.data || !cache || glyph_slot->glyph_index == ((LLSvgRenderData*)glyph_slot->generic.data)->GlyphIndex);
+ if (!glyph_slot->generic.data)
+ {
+ glyph_slot->generic.data = new LLSvgRenderData();
+ glyph_slot->generic.finalizer = LLFontFreeTypeSvgRenderer::OnDataFinalizer;
+ }
+ LLSvgRenderData* datap = static_cast<LLSvgRenderData*>(glyph_slot->generic.data);
+ if (!cache)
+ {
+ datap->GlyphIndex = glyph_slot->glyph_index;
+ datap->Error = FT_Err_Ok;
+ }
+
+ // NOTE: nsvgParse modifies the input string so we need a temporary copy
+ llassert(!datap->pNSvgImage || cache);
+ if (!datap->pNSvgImage)
+ {
+ char* document_buffer = new char[document->svg_document_length + 1];
+ memcpy(document_buffer, document->svg_document, document->svg_document_length);
+ document_buffer[document->svg_document_length] = '\0';
+
+ datap->pNSvgImage = nsvgParse(document_buffer, "px", 0.);
+
+ delete[] document_buffer;
+ }
+
+ if (!datap->pNSvgImage)
+ {
+ datap->Error = FT_Err_Invalid_SVG_Document;
+ return FT_Err_Invalid_SVG_Document;
+ }
+
+ // We don't (currently) support transformations so test for an identity rotation matrix + zero translation
+ if (document->transform.xx != 1 << 16 || document->transform.yx != 0 ||
+ document->transform.xy != 0 || document->transform.yy != 1 << 16 ||
+ document->delta.x > 0 || document->delta.y > 0)
+ {
+ datap->Error = FT_Err_Unimplemented_Feature;
+ return FT_Err_Unimplemented_Feature;
+ }
+
+ float svg_width = datap->pNSvgImage->width;
+ float svg_height = datap->pNSvgImage->height;
+ if (svg_width == 0.f || svg_height == 0.f)
+ {
+ svg_width = document->units_per_EM;
+ svg_height = document->units_per_EM;
+ }
+
+ float svg_x_scale = (float)document->metrics.x_ppem / floorf(svg_width);
+ float svg_y_scale = (float)document->metrics.y_ppem / floorf(svg_height);
+ float svg_scale = llmin(svg_x_scale, svg_y_scale);
+ datap->Scale = svg_scale;
+
+ glyph_slot->bitmap.width = floorf(svg_width) * svg_scale;
+ glyph_slot->bitmap.rows = floorf(svg_height) * svg_scale;
+ glyph_slot->bitmap_left = (document->metrics.x_ppem - glyph_slot->bitmap.width) / 2;
+ glyph_slot->bitmap_top = glyph_slot->face->size->metrics.ascender / 64.f;
+ glyph_slot->bitmap.pitch = glyph_slot->bitmap.width * 4;
+ glyph_slot->bitmap.pixel_mode = FT_PIXEL_MODE_BGRA;
+
+ /* Copied as-is from fcft (MIT license) */
+
+ // Compute all the bearings and set them correctly. The outline is scaled already, we just need to use the bounding box.
+ float horiBearingX = 0.;
+ float horiBearingY = -glyph_slot->bitmap_top;
+
+ // XXX parentheses correct?
+ float vertBearingX = glyph_slot->metrics.horiBearingX / 64.0f - glyph_slot->metrics.horiAdvance / 64.0f / 2;
+ float vertBearingY = (glyph_slot->metrics.vertAdvance / 64.0f - glyph_slot->metrics.height / 64.0f) / 2;
+
+ // Do conversion in two steps to avoid 'bad function cast' warning
+ glyph_slot->metrics.width = glyph_slot->bitmap.width * 64;
+ glyph_slot->metrics.height = glyph_slot->bitmap.rows * 64;
+ glyph_slot->metrics.horiBearingX = horiBearingX * 64;
+ glyph_slot->metrics.horiBearingY = horiBearingY * 64;
+ glyph_slot->metrics.vertBearingX = vertBearingX * 64;
+ glyph_slot->metrics.vertBearingY = vertBearingY * 64;
+ if (glyph_slot->metrics.vertAdvance == 0)
+ {
+ glyph_slot->metrics.vertAdvance = glyph_slot->bitmap.rows * 1.2f * 64;
+ }
+
+ return FT_Err_Ok;
+}
+
+// static
+FT_Error LLFontFreeTypeSvgRenderer::OnRender(FT_GlyphSlot glyph_slot, FT_Pointer*)
+{
+ LLSvgRenderData* datap = static_cast<LLSvgRenderData*>(glyph_slot->generic.data);
+ llassert(FT_Err_Ok == datap->Error);
+ if (FT_Err_Ok != datap->Error)
+ {
+ return datap->Error;
+ }
+
+ // Render to glyph bitmap
+ NSVGrasterizer* nsvgRasterizer = nsvgCreateRasterizer();
+ nsvgRasterize(nsvgRasterizer, datap->pNSvgImage, 0, 0, datap->Scale, glyph_slot->bitmap.buffer, glyph_slot->bitmap.width, glyph_slot->bitmap.rows, glyph_slot->bitmap.pitch);
+ nsvgDeleteRasterizer(nsvgRasterizer);
+ nsvgDelete(datap->pNSvgImage);
+ datap->pNSvgImage = nullptr;
+
+ // Convert from RGBA to BGRA
+ U32* pixel_buffer = (U32*)glyph_slot->bitmap.buffer; U8* byte_buffer = glyph_slot->bitmap.buffer;
+ for (size_t y = 0, h = glyph_slot->bitmap.rows; y < h; y++)
+ {
+ for (size_t x = 0, w = glyph_slot->bitmap.pitch / 4; x < w; x++)
+ {
+ size_t pixel_idx = y * w + x;
+ size_t byte_idx = pixel_idx * 4;
+ U8 alpha = byte_buffer[byte_idx + 3];
+ // Store as ARGB (*TODO - do we still have to care about endianness?)
+ pixel_buffer[y * w + x] = alpha << 24 | (byte_buffer[byte_idx] * alpha / 0xFF) << 16 | (byte_buffer[byte_idx + 1] * alpha / 0xFF) << 8 | (byte_buffer[byte_idx + 2] * alpha / 0xFF);
+ }
+ }
+
+ glyph_slot->format = FT_GLYPH_FORMAT_BITMAP;
+ glyph_slot->bitmap.pixel_mode = FT_PIXEL_MODE_BGRA;
+ return FT_Err_Ok;
+}
diff --git a/indra/llrender/llfontfreetypesvg.h b/indra/llrender/llfontfreetypesvg.h
new file mode 100644
index 0000000000..b5f541991a
--- /dev/null
+++ b/indra/llrender/llfontfreetypesvg.h
@@ -0,0 +1,54 @@
+/**
+ * @file llfontfreetypesvg.h
+ * @brief Freetype font library SVG glyph rendering
+ *
+ * $LicenseInfo:firstyear=2002&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
+ * $/LicenseInfo$
+ */
+
+#pragma once
+
+#include <ft2build.h>
+#include FT_TYPES_H
+#include FT_MODULE_H
+#include FT_OTSVG_H
+
+ // See https://freetype.org/freetype2/docs/reference/ft2-svg_fonts.html
+class LLFontFreeTypeSvgRenderer
+{
+public:
+ // Called when the very first OT-SVG glyph is rendered (across the entire lifetime of our FT_Library object)
+ static FT_Error OnInit(FT_Pointer* state);
+
+ // Called when the ot-svg module is being freed (but only called if the init hook was called previously)
+ static void OnFree(FT_Pointer* state);
+
+ // Called to preset the glyph slot, twice per glyph:
+ // - when FT_Load_Glyph needs to preset the glyph slot (with cache == false)
+ // - right before the svg module calls the render callback hook. (with cache == true)
+ static FT_Error OnPresetGlypthSlot(FT_GlyphSlot glyph_slot, FT_Bool cache, FT_Pointer* state);
+
+ // Called to render an OT-SVG glyph (right after the preset hook OnPresetGlypthSlot was called with cache set to TRUE)
+ static FT_Error OnRender(FT_GlyphSlot glyph_slot, FT_Pointer* state);
+
+ // Called to deallocate our per glyph slot data
+ static void OnDataFinalizer(void* objectp);
+};
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