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Adds bookending, and finally kills the TextureBuilder. Farewell.

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Thomas Harte
2018-11-14 20:49:06 -05:00
parent 0487580a1a
commit 91b19c5c70
4 changed files with 15 additions and 316 deletions
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Outputs/OpenGL/ScanTarget.cpp
+15 -1
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@@ -75,6 +75,10 @@ template <typename T> void ScanTarget::allocate_buffer(const T &array, GLuint &b
ScanTarget::ScanTarget() :
unprocessed_line_texture_(LineBufferWidth, LineBufferHeight, UnprocessedLineBufferTextureUnit, GL_LINEAR) {
// Ensure proper initialisation of the two atomic pointer sets.
read_pointers_.store(write_pointers_);
submit_pointers_.store(write_pointers_);
// Allocate space for the scans and lines.
allocate_buffer(scan_buffer_, scan_buffer_name_, scan_vertex_array_);
allocate_buffer(line_buffer_, line_buffer_name_, line_vertex_array_);
@@ -244,11 +248,21 @@ uint8_t *ScanTarget::begin_data(size_t required_length, size_t required_alignmen
void ScanTarget::end_data(size_t actual_length) {
if(allocation_has_failed_) return;
// memset(&write_area_texture_[size_t(write_pointers_.write_area) * data_type_size_], 0xff, actual_length * data_type_size_);
// Bookend the start of the new data, to safeguard for precision errors in sampling.
memcpy(
&write_area_texture_[size_t(write_pointers_.write_area - 1) * data_type_size_],
&write_area_texture_[size_t(write_pointers_.write_area) * data_type_size_],
data_type_size_);
// The write area was allocated in the knowledge that there's sufficient
// distance left on the current line, so there's no need to worry about carry.
write_pointers_.write_area += actual_length + 1;
// Also bookend the end.
memcpy(
&write_area_texture_[size_t(write_pointers_.write_area) * data_type_size_],
&write_area_texture_[size_t(write_pointers_.write_area - 1) * data_type_size_],
data_type_size_);
}
void ScanTarget::submit() {