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Merge branch 'master' into styles

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# Conflicts:
#	TODO.txt
This commit is contained in:
omar
2017-08-17 17:24:33 +08:00
parent 1e162dfc74 4a7e1ff4d4
commit 24a78767d2
6 changed files with 142 additions and 119 deletions
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104
imgui_draw.cpp
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@ -1034,7 +1034,7 @@ void ImDrawData::ScaleClipRects(const ImVec2& scale)
}
//-----------------------------------------------------------------------------
// ImFontAtlas
// ImFontConfig
//-----------------------------------------------------------------------------
ImFontConfig::ImFontConfig()
@ -1055,12 +1055,17 @@ ImFontConfig::ImFontConfig()
memset(Name, 0, sizeof(Name));
}
//-----------------------------------------------------------------------------
// ImFontAtlas
//-----------------------------------------------------------------------------
ImFontAtlas::ImFontAtlas()
{
TexID = NULL;
TexPixelsAlpha8 = NULL;
TexPixelsRGBA32 = NULL;
TexWidth = TexHeight = TexDesiredWidth = 0;
TexGlyphPadding = 1;
TexUvWhitePixel = ImVec2(0, 0);
}
@ -1281,46 +1286,25 @@ bool ImFontAtlas::Build()
TexUvWhitePixel = ImVec2(0, 0);
ClearTexData();
struct ImFontTempBuildData
{
stbtt_fontinfo FontInfo;
stbrp_rect* Rects;
stbtt_pack_range* Ranges;
int RangesCount;
};
ImFontTempBuildData* tmp_array = (ImFontTempBuildData*)ImGui::MemAlloc((size_t)ConfigData.Size * sizeof(ImFontTempBuildData));
// Initialize font information early (so we can error without any cleanup) + count glyphs
int total_glyph_count = 0;
int total_glyph_range_count = 0;
// Count glyphs/ranges
int total_glyphs_count = 0;
int total_ranges_count = 0;
for (int input_i = 0; input_i < ConfigData.Size; input_i++)
{
ImFontConfig& cfg = ConfigData[input_i];
ImFontTempBuildData& tmp = tmp_array[input_i];
IM_ASSERT(cfg.DstFont && (!cfg.DstFont->IsLoaded() || cfg.DstFont->ContainerAtlas == this));
const int font_offset = stbtt_GetFontOffsetForIndex((unsigned char*)cfg.FontData, cfg.FontNo);
IM_ASSERT(font_offset >= 0);
if (!stbtt_InitFont(&tmp.FontInfo, (unsigned char*)cfg.FontData, font_offset))
return false;
// Count glyphs
if (!cfg.GlyphRanges)
cfg.GlyphRanges = GetGlyphRangesDefault();
for (const ImWchar* in_range = cfg.GlyphRanges; in_range[0] && in_range[1]; in_range += 2)
{
total_glyph_count += (in_range[1] - in_range[0]) + 1;
total_glyph_range_count++;
}
for (const ImWchar* in_range = cfg.GlyphRanges; in_range[0] && in_range[1]; in_range += 2, total_ranges_count++)
total_glyphs_count += (in_range[1] - in_range[0]) + 1;
}
// Start packing. We need a known width for the skyline algorithm. Using a cheap heuristic here to decide of width. User can override TexDesiredWidth if they wish.
// Start packing. We need a known width for the skyline algorithm. Using a dumb heuristic here to decide of width. User can override TexDesiredWidth and TexGlyphPadding if they wish.
// After packing is done, width shouldn't matter much, but some API/GPU have texture size limitations and increasing width can decrease height.
TexWidth = (TexDesiredWidth > 0) ? TexDesiredWidth : (total_glyph_count > 4000) ? 4096 : (total_glyph_count > 2000) ? 2048 : (total_glyph_count > 1000) ? 1024 : 512;
TexWidth = (TexDesiredWidth > 0) ? TexDesiredWidth : (total_glyphs_count > 4000) ? 4096 : (total_glyphs_count > 2000) ? 2048 : (total_glyphs_count > 1000) ? 1024 : 512;
TexHeight = 0;
const int max_tex_height = 1024*32;
stbtt_pack_context spc;
stbtt_PackBegin(&spc, NULL, TexWidth, max_tex_height, 0, 1, NULL);
stbtt_PackBegin(&spc, NULL, TexWidth, max_tex_height, 0, TexGlyphPadding, NULL);
// Pack our extra data rectangles first, so it will be on the upper-left corner of our texture (UV will have small values).
ImVector<stbrp_rect> extra_rects;
@ -1331,14 +1315,34 @@ bool ImFontAtlas::Build()
if (extra_rects[i].was_packed)
TexHeight = ImMax(TexHeight, extra_rects[i].y + extra_rects[i].h);
// Initialize font information (so we can error without any cleanup)
struct ImFontTempBuildData
{
stbtt_fontinfo FontInfo;
stbrp_rect* Rects;
stbtt_pack_range* Ranges;
int RangesCount;
};
ImFontTempBuildData* tmp_array = (ImFontTempBuildData*)ImGui::MemAlloc((size_t)ConfigData.Size * sizeof(ImFontTempBuildData));
for (int input_i = 0; input_i < ConfigData.Size; input_i++)
{
ImFontConfig& cfg = ConfigData[input_i];
ImFontTempBuildData& tmp = tmp_array[input_i];
IM_ASSERT(cfg.DstFont && (!cfg.DstFont->IsLoaded() || cfg.DstFont->ContainerAtlas == this));
const int font_offset = stbtt_GetFontOffsetForIndex((unsigned char*)cfg.FontData, cfg.FontNo);
IM_ASSERT(font_offset >= 0);
if (!stbtt_InitFont(&tmp.FontInfo, (unsigned char*)cfg.FontData, font_offset))
return false;
}
// Allocate packing character data and flag packed characters buffer as non-packed (x0=y0=x1=y1=0)
int buf_packedchars_n = 0, buf_rects_n = 0, buf_ranges_n = 0;
stbtt_packedchar* buf_packedchars = (stbtt_packedchar*)ImGui::MemAlloc(total_glyph_count * sizeof(stbtt_packedchar));
stbrp_rect* buf_rects = (stbrp_rect*)ImGui::MemAlloc(total_glyph_count * sizeof(stbrp_rect));
stbtt_pack_range* buf_ranges = (stbtt_pack_range*)ImGui::MemAlloc(total_glyph_range_count * sizeof(stbtt_pack_range));
memset(buf_packedchars, 0, total_glyph_count * sizeof(stbtt_packedchar));
memset(buf_rects, 0, total_glyph_count * sizeof(stbrp_rect)); // Unnecessary but let's clear this for the sake of sanity.
memset(buf_ranges, 0, total_glyph_range_count * sizeof(stbtt_pack_range));
stbtt_packedchar* buf_packedchars = (stbtt_packedchar*)ImGui::MemAlloc(total_glyphs_count * sizeof(stbtt_packedchar));
stbrp_rect* buf_rects = (stbrp_rect*)ImGui::MemAlloc(total_glyphs_count * sizeof(stbrp_rect));
stbtt_pack_range* buf_ranges = (stbtt_pack_range*)ImGui::MemAlloc(total_ranges_count * sizeof(stbtt_pack_range));
memset(buf_packedchars, 0, total_glyphs_count * sizeof(stbtt_packedchar));
memset(buf_rects, 0, total_glyphs_count * sizeof(stbrp_rect)); // Unnecessary but let's clear this for the sake of sanity.
memset(buf_ranges, 0, total_ranges_count * sizeof(stbtt_pack_range));
// First font pass: pack all glyphs (no rendering at this point, we are working with rectangles in an infinitely tall texture at this point)
for (int input_i = 0; input_i < ConfigData.Size; input_i++)
@ -1347,17 +1351,14 @@ bool ImFontAtlas::Build()
ImFontTempBuildData& tmp = tmp_array[input_i];
// Setup ranges
int glyph_count = 0;
int glyph_ranges_count = 0;
for (const ImWchar* in_range = cfg.GlyphRanges; in_range[0] && in_range[1]; in_range += 2)
{
glyph_count += (in_range[1] - in_range[0]) + 1;
glyph_ranges_count++;
}
int font_glyphs_count = 0;
int font_ranges_count = 0;
for (const ImWchar* in_range = cfg.GlyphRanges; in_range[0] && in_range[1]; in_range += 2, font_ranges_count++)
font_glyphs_count += (in_range[1] - in_range[0]) + 1;
tmp.Ranges = buf_ranges + buf_ranges_n;
tmp.RangesCount = glyph_ranges_count;
buf_ranges_n += glyph_ranges_count;
for (int i = 0; i < glyph_ranges_count; i++)
tmp.RangesCount = font_ranges_count;
buf_ranges_n += font_ranges_count;
for (int i = 0; i < font_ranges_count; i++)
{
const ImWchar* in_range = &cfg.GlyphRanges[i * 2];
stbtt_pack_range& range = tmp.Ranges[i];
@ -1370,9 +1371,10 @@ bool ImFontAtlas::Build()
// Pack
tmp.Rects = buf_rects + buf_rects_n;
buf_rects_n += glyph_count;
buf_rects_n += font_glyphs_count;
stbtt_PackSetOversampling(&spc, cfg.OversampleH, cfg.OversampleV);
int n = stbtt_PackFontRangesGatherRects(&spc, &tmp.FontInfo, tmp.Ranges, tmp.RangesCount, tmp.Rects);
IM_ASSERT(n == font_glyphs_count);
stbrp_pack_rects((stbrp_context*)spc.pack_info, tmp.Rects, n);
// Extend texture height
@ -1380,9 +1382,9 @@ bool ImFontAtlas::Build()
if (tmp.Rects[i].was_packed)
TexHeight = ImMax(TexHeight, tmp.Rects[i].y + tmp.Rects[i].h);
}
IM_ASSERT(buf_rects_n == total_glyph_count);
IM_ASSERT(buf_packedchars_n == total_glyph_count);
IM_ASSERT(buf_ranges_n == total_glyph_range_count);
IM_ASSERT(buf_rects_n == total_glyphs_count);
IM_ASSERT(buf_packedchars_n == total_glyphs_count);
IM_ASSERT(buf_ranges_n == total_ranges_count);
// Create texture
TexHeight = ImUpperPowerOfTwo(TexHeight);
@ -1391,7 +1393,7 @@ bool ImFontAtlas::Build()
spc.pixels = TexPixelsAlpha8;
spc.height = TexHeight;
// Second pass: render characters
// Second pass: render font characters
for (int input_i = 0; input_i < ConfigData.Size; input_i++)
{
ImFontConfig& cfg = ConfigData[input_i];