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Prepacking mouse cursors to save on source code size, generally simpler #155
This commit is contained in:
ocornut
parent
810fcd8bcb
commit
9363e6c154
286
imgui.cpp
286
imgui.cpp
@ -2149,10 +2149,10 @@ void ImGui::Render()
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const ImTextureID tex_id = g.IO.Fonts->TexID;
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g.MouseCursorDrawList.Clear();
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g.MouseCursorDrawList.PushTextureID(tex_id);
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g.MouseCursorDrawList.AddImage(tex_id, pos+ImVec2(1,0), pos+ImVec2(1,0) + size, cursor_data.TexUvMin[0], cursor_data.TexUvMax[0], 0x30000000); // Shadow
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g.MouseCursorDrawList.AddImage(tex_id, pos+ImVec2(2,0), pos+ImVec2(2,0) + size, cursor_data.TexUvMin[0], cursor_data.TexUvMax[0], 0x30000000); // Shadow
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g.MouseCursorDrawList.AddImage(tex_id, pos, pos + size, cursor_data.TexUvMin[0], cursor_data.TexUvMax[0], 0xFF000000); // Black border
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g.MouseCursorDrawList.AddImage(tex_id, pos, pos + size, cursor_data.TexUvMin[1], cursor_data.TexUvMax[1], 0xFFFFFFFF); // White fill
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g.MouseCursorDrawList.AddImage(tex_id, pos+ImVec2(1,0), pos+ImVec2(1,0) + size, cursor_data.TexUvMin[1], cursor_data.TexUvMax[1], 0x30000000); // Shadow
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g.MouseCursorDrawList.AddImage(tex_id, pos+ImVec2(2,0), pos+ImVec2(2,0) + size, cursor_data.TexUvMin[1], cursor_data.TexUvMax[1], 0x30000000); // Shadow
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g.MouseCursorDrawList.AddImage(tex_id, pos, pos + size, cursor_data.TexUvMin[1], cursor_data.TexUvMax[1], 0xFF000000); // Black border
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g.MouseCursorDrawList.AddImage(tex_id, pos, pos + size, cursor_data.TexUvMin[0], cursor_data.TexUvMax[0], 0xFFFFFFFF); // White fill
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g.MouseCursorDrawList.PopTextureID();
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AddDrawListToRenderList(&g.MouseCursorDrawList);
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}
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@ -7858,10 +7858,9 @@ bool ImFontAtlas::Build()
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ImVector<stbrp_rect> extra_rects;
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RenderCustomTexData(0, &extra_rects);
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stbrp_pack_rects((stbrp_context*)spc.pack_info, &extra_rects[0], (int)extra_rects.size());
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int tex_height = 0;
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for (size_t i = 0; i < extra_rects.size(); i++)
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if (extra_rects[i].was_packed)
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tex_height = ImMax(tex_height, extra_rects[i].y + extra_rects[i].h);
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TexHeight = ImMax(TexHeight, extra_rects[i].y + extra_rects[i].h);
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// Allocate packing character data and flag packed characters buffer as non-packed (x0=y0=x1=y1=0)
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int buf_packedchars_n = 0, buf_rects_n = 0, buf_ranges_n = 0;
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@ -7908,14 +7907,14 @@ bool ImFontAtlas::Build()
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// Extend texture height
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for (int i = 0; i < n; i++)
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if (data.Rects[i].was_packed)
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tex_height = ImMax(tex_height, data.Rects[i].y + data.Rects[i].h);
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TexHeight = ImMax(TexHeight, data.Rects[i].y + data.Rects[i].h);
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}
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IM_ASSERT(buf_rects_n == total_glyph_count);
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IM_ASSERT(buf_packedchars_n == total_glyph_count);
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IM_ASSERT(buf_ranges_n == total_glyph_range_count);
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// Create texture
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TexHeight = ImUpperPowerOfTwo(tex_height);
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TexHeight = ImUpperPowerOfTwo(TexHeight);
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TexPixelsAlpha8 = (unsigned char*)ImGui::MemAlloc(TexWidth * TexHeight);
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memset(TexPixelsAlpha8, 0, TexWidth * TexHeight);
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spc.pixels = TexPixelsAlpha8;
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@ -7989,215 +7988,94 @@ bool ImFontAtlas::Build()
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return true;
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}
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static void AddMouseCursor(int pass, ImVector<stbrp_rect>& rects, int& rect_i, ImGuiMouseCursor type, const ImVec2& offset, const ImVec2& size, const char* in_char_pixels, unsigned char* tex_pixels, const ImVec2& tex_uv_scale, int tex_pitch)
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void ImFontAtlas::RenderCustomTexData(int pass, void* p_rects)
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{
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// . = white layer, X = black layer, others are blank
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const int TEX_DATA_W = 90;
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const int TEX_DATA_H = 27;
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const char texture_data[TEX_DATA_W*TEX_DATA_H+1] =
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{
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"..- -XXXXXXX- X - X -XXXXXXX - XXXXXXX"
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"..- -X.....X- X.X - X.X -X.....X - X.....X"
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"--- -XXX.XXX- X...X - X...X -X....X - X....X"
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"X - X.X - X.....X - X.....X -X...X - X...X"
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"XX - X.X -X.......X- X.......X -X..X.X - X.X..X"
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"X.X - X.X -XXXX.XXXX- XXXX.XXXX -X.X X.X - X.X X.X"
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"X..X - X.X - X.X - X.X -XX X.X - X.X XX"
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"X...X - X.X - X.X - XX X.X XX - X.X - X.X "
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"X....X - X.X - X.X - X.X X.X X.X - X.X - X.X "
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"X.....X - X.X - X.X - X..X X.X X..X - X.X - X.X "
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"X......X - X.X - X.X - X...XXXXXX.XXXXXX...X - X.X XX-XX X.X "
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"X.......X - X.X - X.X -X.....................X- X.X X.X-X.X X.X "
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"X........X - X.X - X.X - X...XXXXXX.XXXXXX...X - X.X..X-X..X.X "
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"X.........X -XXX.XXX- X.X - X..X X.X X..X - X...X-X...X "
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"X..........X-X.....X- X.X - X.X X.X X.X - X....X-X....X "
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"X......XXXXX-XXXXXXX- X.X - XX X.X XX - X.....X-X.....X "
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"X...X..X --------- X.X - X.X - XXXXXXX-XXXXXXX "
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"X..X X..X - -XXXX.XXXX- XXXX.XXXX ------------------------------------"
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"X.X X..X - -X.......X- X.......X - XX XX - "
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"XX X..X - - X.....X - X.....X - X.X X.X - "
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" X..X - X...X - X...X - X..X X..X - "
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" XX - X.X - X.X - X...XXXXXXXXXXXXX...X - "
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"------------ - X - X -X.....................X- "
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" ----------------------------------- X...XXXXXXXXXXXXX...X - "
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" - X..X X..X - "
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" - X.X X.X - "
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" - XX XX - "
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};
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ImVector<stbrp_rect>& rects = *(ImVector<stbrp_rect>*)p_rects;
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if (pass == 0)
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{
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stbrp_rect r;
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r.w = (unsigned short)((size.x*2)+1);
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r.h = (unsigned short)(size.y);
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r.w = (TEX_DATA_W*2)+1;
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r.h = TEX_DATA_H+1;
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rects.push_back(r);
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}
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else if (pass == 1)
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{
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ImGuiMouseCursorData& cursor_data = GImGui->MouseCursorData[type];
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cursor_data.Type = type;
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cursor_data.Size = size;
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cursor_data.Offset = offset;
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const stbrp_rect& r = rects[rect_i++];
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ImVec2 pos((float)r.x, (float)r.y);
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for (int layer = 0; layer < 2; layer++)
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// Copy pixels
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const stbrp_rect& r = rects[0];
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for (int y = 0, n = 0; y < TEX_DATA_H; y++)
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for (int x = 0; x < TEX_DATA_W; x++, n++)
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{
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const int offset0 = (int)(r.x + x) + (int)(r.y + y) * TexWidth;
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const int offset1 = offset0 + 1 + TEX_DATA_W;
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TexPixelsAlpha8[offset0] = texture_data[n] == '.' ? 0xFF : 0x00;
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TexPixelsAlpha8[offset1] = texture_data[n] == 'X' ? 0xFF : 0x00;
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}
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const ImVec2 tex_uv_scale(1.0f / TexWidth, 1.0f / TexHeight);
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TexUvWhitePixel = ImVec2(r.x + 0.5f, r.y + 0.5f) * tex_uv_scale;
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const ImVec2 cursor_datas[ImGuiMouseCursor_Count_][3] =
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{
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// Draw a mouse cursor into texture
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// Because our font uses a single color channel, we have to spread the cursor in 2 layers (black/white) which will be rendered separately.
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const char layer_char = layer ? '.' : 'X';
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cursor_data.TexUvMin[layer] = (pos) * tex_uv_scale;
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cursor_data.TexUvMax[layer] = (pos + size) * tex_uv_scale;
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for (int y = 0, n = 0; y < (int)size.y; y++)
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for (int x = 0; x < (int)size.x; x++, n++)
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tex_pixels[((int)pos.x + x) + ((int)pos.y + y) * tex_pitch] = (in_char_pixels[n] == layer_char) ? 0xFF : 0x00;
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pos.x += size.x + 1;
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// Pos ........ Size ......... Offset ......
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{ ImVec2(0,3), ImVec2(12,19), ImVec2( 0, 0) }, // ImGuiMouseCursor_Arrow
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{ ImVec2(13,0), ImVec2(7,16), ImVec2( 4, 9) }, // ImGuiMouseCursor_TextInput
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{ ImVec2(31,0), ImVec2(23,23), ImVec2(11,11) }, // ImGuiMouseCursor_Move
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{ ImVec2(21,0), ImVec2( 9,23), ImVec2( 5,11) }, // ImGuiMouseCursor_ResizeNS
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{ ImVec2(55,18),ImVec2(23, 9), ImVec2(11, 5) }, // ImGuiMouseCursor_ResizeEW
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{ ImVec2(73,0), ImVec2(17,17), ImVec2( 9, 9) }, // ImGuiMouseCursor_ResizeNESW
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{ ImVec2(55,0), ImVec2(17,17), ImVec2( 9, 9) }, // ImGuiMouseCursor_ResizeNWSE
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};
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for (int type = 0; type < ImGuiMouseCursor_Count_; type++)
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{
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ImGuiMouseCursorData& cursor_data = GImGui->MouseCursorData[type];
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ImVec2 pos = cursor_datas[type][0] + ImVec2((float)r.x, (float)r.y);
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const ImVec2 size = cursor_datas[type][1];
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cursor_data.Type = type;
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cursor_data.Size = size;
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cursor_data.Offset = cursor_datas[type][2];
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cursor_data.TexUvMin[0] = (pos) * tex_uv_scale;
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cursor_data.TexUvMax[0] = (pos + size) * tex_uv_scale;
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pos.x += TEX_DATA_W+1;
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cursor_data.TexUvMin[1] = (pos) * tex_uv_scale;
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cursor_data.TexUvMax[1] = (pos + size) * tex_uv_scale;
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}
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}
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}
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void ImFontAtlas::RenderCustomTexData(int pass, void* rects_opaque)
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{
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ImVector<stbrp_rect>& rects = *(ImVector<stbrp_rect>*)rects_opaque;
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int rect_i = 0;
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// Draw white pixel into texture and make UV points to it
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const ImVec2 uv_scale(1.0f / TexWidth, 1.0f / TexHeight);
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if (pass == 0)
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{
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// Measure
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stbrp_rect r;
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r.w = r.h = 3;
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rects.push_back(r);
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}
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else if (pass == 1)
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{
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// Render
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const stbrp_rect& r = rects[rect_i++];
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const int offset = (int)r.x + (int)r.y * TexWidth;
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TexPixelsAlpha8[offset] = TexPixelsAlpha8[offset+1] = TexPixelsAlpha8[TexWidth] = TexPixelsAlpha8[TexWidth+1] = 0xFF;
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TexUvWhitePixel = ImVec2(r.x + 0.5f, r.y + 0.5f) * uv_scale;
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}
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const char cursor_arrow[12*19+1] =
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{
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"X "
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"XX "
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"X.X "
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"X..X "
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"X...X "
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"X....X "
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"X.....X "
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"X......X "
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"X.......X "
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"X........X "
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"X.........X "
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"X..........X"
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"X......XXXXX"
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"X...X..X "
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"X..X X..X "
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"X.X X..X "
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"XX X..X "
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" X..X "
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" XX "
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};
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const char cursor_text_input[7*16+1] =
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{
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"XXXXXXX"
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"X.....X"
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"XXX.XXX"
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" X.X "
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" X.X "
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" X.X "
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" X.X "
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" X.X "
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" X.X "
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" X.X "
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" X.X "
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" X.X "
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" X.X "
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"XXX.XXX"
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"X.....X"
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"XXXXXXX"
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};
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const char cursor_move[23*23+1] =
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{
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" X "
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" X.X "
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" X...X "
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" X.....X "
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" X.......X "
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" XXXX.XXXX "
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" X.X "
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" XX X.X XX "
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" X.X X.X X.X "
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" X..X X.X X..X "
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" X...XXXXXX.XXXXXX...X "
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"X.....................X"
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" X...XXXXXX.XXXXXX...X "
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" X..X X.X X..X "
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" X.X X.X X.X "
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" XX X.X XX "
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" X.X "
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" XXXX.XXXX "
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" X.......X "
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" X.....X "
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" X...X "
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" X.X "
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" X "
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};
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const char cursor_resize_ns[9*23+1] =
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{
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" X "
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" X.X "
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" X...X "
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" X.....X "
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"X.......X"
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"XXXX.XXXX"
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" X.X "
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" X.X "
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" X.X "
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" X.X "
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" X.X "
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" X.X "
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" X.X "
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" X.X "
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" X.X "
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" X.X "
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" X.X "
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"XXXX.XXXX"
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"X.......X"
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" X.....X "
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" X...X "
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" X.X "
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" X "
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};
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const char cursor_resize_ew[23*9+1] =
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{
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" XX XX "
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" X.X X.X "
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" X..X X..X "
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" X...XXXXXXXXXXXXX...X "
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"X.....................X"
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" X...XXXXXXXXXXXXX...X "
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" X..X X..X "
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" X.X X.X "
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" XX XX "
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};
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const char cursor_resize_nwse[17*17+1] =
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{
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"XXXXXXX "
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"X.....X "
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"X....X "
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"X...X "
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"X..X.X "
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"X.X X.X "
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"XX X.X "
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" X.X "
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" X.X "
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" X.X "
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" X.X XX"
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" X.X X.X"
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" X.X..X"
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" X...X"
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" X....X"
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" X.....X"
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" XXXXXXX"
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};
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const char cursor_resize_nesw[17*17+1] =
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{
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" XXXXXXX"
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" X.....X"
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" X....X"
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" X...X"
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" X.X..X"
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" X.X X.X"
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" X.X XX"
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" X.X "
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" X.X "
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" X.X "
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"XX X.X "
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"X.X X.X "
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"X..X.X "
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"X...X "
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"X....X "
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"X.....X "
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"XXXXXXX "
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};
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AddMouseCursor(pass, rects, rect_i, ImGuiMouseCursor_Arrow, ImVec2(0,0), ImVec2(12,19), cursor_arrow, TexPixelsAlpha8, uv_scale, TexWidth);
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AddMouseCursor(pass, rects, rect_i, ImGuiMouseCursor_TextInput, ImVec2(4,9), ImVec2(7,16), cursor_text_input, TexPixelsAlpha8, uv_scale, TexWidth);
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AddMouseCursor(pass, rects, rect_i, ImGuiMouseCursor_Move, ImVec2(11,11), ImVec2(23,23), cursor_move, TexPixelsAlpha8, uv_scale, TexWidth);
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AddMouseCursor(pass, rects, rect_i, ImGuiMouseCursor_ResizeNS, ImVec2(5,11), ImVec2(9,23), cursor_resize_ns, TexPixelsAlpha8, uv_scale, TexWidth);
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AddMouseCursor(pass, rects, rect_i, ImGuiMouseCursor_ResizeEW, ImVec2(11,5), ImVec2(23,9), cursor_resize_ew, TexPixelsAlpha8, uv_scale, TexWidth);
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AddMouseCursor(pass, rects, rect_i, ImGuiMouseCursor_ResizeNESW,ImVec2(9,9), ImVec2(17,17), cursor_resize_nesw, TexPixelsAlpha8, uv_scale, TexWidth);
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AddMouseCursor(pass, rects, rect_i, ImGuiMouseCursor_ResizeNWSE,ImVec2(9,9), ImVec2(17,17), cursor_resize_nwse, TexPixelsAlpha8, uv_scale, TexWidth);
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}
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//-----------------------------------------------------------------------------
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// ImFont
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//-----------------------------------------------------------------------------
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