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Allows receivers of nullptr from begin_data to output any quantity of data.

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Thomas Harte
2020-02-01 21:43:48 -05:00
parent ff39f71ca0
commit 8aabf1b374
1 changed files with 7 additions and 2 deletions
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9
Outputs/CRT/CRT.hpp
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@@ -236,10 +236,15 @@ class CRT {
@returns A pointer to the allocated area if room is available; @c nullptr otherwise. @returns A pointer to the allocated area if room is available; @c nullptr otherwise.
*/ */
inline uint8_t *begin_data(std::size_t required_length, std::size_t required_alignment = 1) { inline uint8_t *begin_data(std::size_t required_length, std::size_t required_alignment = 1) {
const auto result = scan_target_->begin_data(required_length, required_alignment);
#ifndef NDEBUG #ifndef NDEBUG
allocated_data_length_ = required_length; // If data was allocated, make a record of how much so as to be able to hold the caller to that
// contract later. If allocation failed, don't constrain the caller. This allows callers that
// allocate on demand but may allow one failure to hold for a longer period — e.g. until the
// next line.
allocated_data_length_ = result ? required_length : std::numeric_limits<size_t>::max();
#endif #endif
return scan_target_->begin_data(required_length, required_alignment); return result;
} }
/*! Sets the gamma exponent for the simulated screen. */ /*! Sets the gamma exponent for the simulated screen. */