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Fonts: Fix calling ClearTexData() (clearing CPU side font data) triggering an assert in NewFrame(). (#3487) + Backends: added additional assert to facilitate detecting user understand they haven't initialized a backend.
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3
imgui.h
3
imgui.h
@ -2627,7 +2627,7 @@ struct ImFontAtlas
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IMGUI_API bool Build(); // Build pixels data. This is called automatically for you by the GetTexData*** functions.
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IMGUI_API void GetTexDataAsAlpha8(unsigned char** out_pixels, int* out_width, int* out_height, int* out_bytes_per_pixel = NULL); // 1 byte per-pixel
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IMGUI_API void GetTexDataAsRGBA32(unsigned char** out_pixels, int* out_width, int* out_height, int* out_bytes_per_pixel = NULL); // 4 bytes-per-pixel
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bool IsBuilt() const { return Fonts.Size > 0 && (TexPixelsAlpha8 != NULL || TexPixelsRGBA32 != NULL); }
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bool IsBuilt() const { return Fonts.Size > 0 && TexReady; } // Bit ambiguous: used to detect when user didn't built texture but effectively we should check TexID != 0 except that would be backend dependent...
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void SetTexID(ImTextureID id) { TexID = id; }
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//-------------------------------------------
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@ -2677,6 +2677,7 @@ struct ImFontAtlas
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// [Internal]
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// NB: Access texture data via GetTexData*() calls! Which will setup a default font for you.
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bool TexReady; // Set when texture was built matching current font input
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bool TexPixelsUseColors; // Tell whether our texture data is known to use colors (rather than just alpha channel), in order to help backend select a format.
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unsigned char* TexPixelsAlpha8; // 1 component per pixel, each component is unsigned 8-bit. Total size = TexWidth * TexHeight
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unsigned int* TexPixelsRGBA32; // 4 component per pixel, each component is unsigned 8-bit. Total size = TexWidth * TexHeight * 4
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