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.

This commit is contained in:
ocornut
2021-06-29 17:53:41 +02:00
parent 4cec3a0467
commit 23a15834fa
14 changed files with 29 additions and 1 deletions

View File

@ -2627,7 +2627,7 @@ struct ImFontAtlas
IMGUI_API bool Build(); // Build pixels data. This is called automatically for you by the GetTexData*** functions.
IMGUI_API void GetTexDataAsAlpha8(unsigned char** out_pixels, int* out_width, int* out_height, int* out_bytes_per_pixel = NULL); // 1 byte per-pixel
IMGUI_API void GetTexDataAsRGBA32(unsigned char** out_pixels, int* out_width, int* out_height, int* out_bytes_per_pixel = NULL); // 4 bytes-per-pixel
bool IsBuilt() const { return Fonts.Size > 0 && (TexPixelsAlpha8 != NULL || TexPixelsRGBA32 != NULL); }
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...
void SetTexID(ImTextureID id) { TexID = id; }
//-------------------------------------------
@ -2677,6 +2677,7 @@ struct ImFontAtlas
// [Internal]
// NB: Access texture data via GetTexData*() calls! Which will setup a default font for you.
bool TexReady; // Set when texture was built matching current font input
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.
unsigned char* TexPixelsAlpha8; // 1 component per pixel, each component is unsigned 8-bit. Total size = TexWidth * TexHeight
unsigned int* TexPixelsRGBA32; // 4 component per pixel, each component is unsigned 8-bit. Total size = TexWidth * TexHeight * 4