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ImFont: Added RenderChar() helper.

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ocornut 2016-04-22 19:58:10 +02:00
parent 29e259a43c
commit fe73a23cf5
2 changed files with 21 additions and 4 deletions
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1
imgui.h
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@ -1324,6 +1324,7 @@ struct ImFont
// 'wrap_width' enable automatic word-wrapping across multiple lines to fit into given width. 0.0f to disable. // 'wrap_width' enable automatic word-wrapping across multiple lines to fit into given width. 0.0f to disable.
IMGUI_API ImVec2 CalcTextSizeA(float size, float max_width, float wrap_width, const char* text_begin, const char* text_end = NULL, const char** remaining = NULL) const; // utf8 IMGUI_API ImVec2 CalcTextSizeA(float size, float max_width, float wrap_width, const char* text_begin, const char* text_end = NULL, const char** remaining = NULL) const; // utf8
IMGUI_API const char* CalcWordWrapPositionA(float scale, const char* text, const char* text_end, float wrap_width) const; IMGUI_API const char* CalcWordWrapPositionA(float scale, const char* text, const char* text_end, float wrap_width) const;
IMGUI_API void RenderChar(ImDrawList* draw_list, float size, ImVec2 pos, ImU32 col, unsigned short c) const;
IMGUI_API void RenderText(float size, ImVec2 pos, ImU32 col, const ImVec4& clip_rect, const char* text_begin, const char* text_end, ImDrawList* draw_list, float wrap_width = 0.0f, bool cpu_fine_clip = false) const; IMGUI_API void RenderText(float size, ImVec2 pos, ImU32 col, const ImVec4& clip_rect, const char* text_begin, const char* text_end, ImDrawList* draw_list, float wrap_width = 0.0f, bool cpu_fine_clip = false) const;
}; };

24
imgui_draw.cpp
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@ -1940,6 +1940,22 @@ ImVec2 ImFont::CalcTextSizeA(float size, float max_width, float wrap_width, cons
return text_size; return text_size;
} }
void ImFont::RenderChar(ImDrawList* draw_list, float size, ImVec2 pos, ImU32 col, unsigned short c) const
{
if (c == ' ' || c == '\t' || c == '\n' || c == '\r') // Match behavior of RenderText(), those 4 codepoints are hard-coded.
return;
if (const Glyph* glyph = FindGlyph(c))
{
float scale = (size >= 0.0f) ? (size / FontSize) : 1.0f;
pos.x = (float)(int)pos.x + DisplayOffset.x;
pos.y = (float)(int)pos.y + DisplayOffset.y;
ImVec2 pos_tl(pos.x + glyph->X0 * scale, pos.y + glyph->Y0 * scale);
ImVec2 pos_br(pos.x + glyph->X1 * scale, pos.y + glyph->Y1 * scale);
draw_list->PrimReserve(6, 4);
draw_list->PrimRectUV(pos_tl, pos_br, ImVec2(glyph->U0, glyph->V0), ImVec2(glyph->U1, glyph->V1), col);
}
}
void ImFont::RenderText(float size, ImVec2 pos, ImU32 col, const ImVec4& clip_rect, const char* text_begin, const char* text_end, ImDrawList* draw_list, float wrap_width, bool cpu_fine_clip) const void ImFont::RenderText(float size, ImVec2 pos, ImU32 col, const ImVec4& clip_rect, const char* text_begin, const char* text_end, ImDrawList* draw_list, float wrap_width, bool cpu_fine_clip) const
{ {
if (!text_end) if (!text_end)
@ -2034,11 +2050,11 @@ void ImFont::RenderText(float size, ImVec2 pos, ImU32 col, const ImVec4& clip_re
if (c != ' ' && c != '\t') if (c != ' ' && c != '\t')
{ {
// We don't do a second finer clipping test on the Y axis as we've already skipped anything before clip_rect.y and exit once we pass clip_rect.w // We don't do a second finer clipping test on the Y axis as we've already skipped anything before clip_rect.y and exit once we pass clip_rect.w
float y1 = (float)(y + glyph->Y0 * scale); float y1 = y + glyph->Y0 * scale;
float y2 = (float)(y + glyph->Y1 * scale); float y2 = y + glyph->Y1 * scale;
float x1 = (float)(x + glyph->X0 * scale); float x1 = x + glyph->X0 * scale;
float x2 = (float)(x + glyph->X1 * scale); float x2 = x + glyph->X1 * scale;
if (x1 <= clip_rect.z && x2 >= clip_rect.x) if (x1 <= clip_rect.z && x2 >= clip_rect.x)
{ {
// Render a character // Render a character