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At the expense of API simplicity, at least for now, resolved the most glaring cause of dirty lines.

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This commit is contained in:
Thomas Harte 2016-11-16 11:34:05 +08:00
parent 44d3fd6d5b
commit 9ee11d7765
3 changed files with 23 additions and 5 deletions
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18
Outputs/CRT/CRT.cpp
View File

@ -141,7 +141,8 @@ void CRT::advance_cycles(unsigned int number_of_cycles, unsigned int source_divi
source_input_position_x1() = tex_x;
source_input_position_y() = tex_y;
source_output_position_x1() = (uint16_t)_horizontal_flywheel->get_current_output_position();
source_output_position_y() = _openGL_output_builder->get_composite_output_y();
// Don't write output_y now, write it later; we won't necessarily know what it is outside of the locked region
// source_output_position_y() = _openGL_output_builder->get_composite_output_y();
source_phase() = _colour_burst_phase;
source_amplitude() = _colour_burst_amplitude;
source_phase_time() = (uint8_t)_colour_burst_time; // assumption: burst was within the first 1/16 of the line
@ -190,17 +191,28 @@ void CRT::advance_cycles(unsigned int number_of_cycles, unsigned int source_divi
{
_output_run.x1 = (uint16_t)_horizontal_flywheel->get_current_output_position();
_output_run.y = (uint16_t)(_vertical_flywheel->get_current_output_position() / _vertical_flywheel_output_divider);
_output_run.tex_y = _openGL_output_builder->get_composite_output_y();
}
else
{
_openGL_output_builder->lock_output();
// Get and write all those previously unwritten output ys
uint16_t output_y = _openGL_output_builder->get_composite_output_y();
size_t size;
uint8_t *buffered_lines = _openGL_output_builder->get_buffered_source_runs(size);
for(size_t position = 0; position < size; position += SourceVertexSize)
{
(*(uint16_t *)&buffered_lines[position + SourceVertexOffsetOfOutputStart + 2]) = output_y;
}
// Construct the output run
uint8_t *next_run = _openGL_output_builder->get_next_output_run();
output_x1() = _output_run.x1;
output_position_y() = _output_run.y;
output_tex_y() = _output_run.tex_y;
output_tex_y() = output_y;
output_x2() = (uint16_t)_horizontal_flywheel->get_current_output_position();
_openGL_output_builder->complete_output_run();
_openGL_output_builder->unlock_output();
}
_is_writing_composite_run ^= true;

2
Outputs/CRT/CRT.hpp
View File

@ -83,7 +83,7 @@ class CRT {
// temporary storage used during the construction of output runs
struct {
uint16_t x1, y, tex_y;
uint16_t x1, y;
} _output_run;
// The delegate

8
Outputs/CRT/Internals/CRTOpenGL.hpp
View File

@ -105,6 +105,12 @@ class OpenGLOutputBuilder {
_line_buffer.pointer += SourceVertexSize;
}
inline uint8_t *get_buffered_source_runs(size_t &size)
{
size = _line_buffer.pointer;
return _line_buffer.data.data();
}
inline uint8_t *get_next_output_run()
{
if(_output_buffer.pointer == OutputVertexBufferDataSize) return nullptr;
@ -161,7 +167,7 @@ class OpenGLOutputBuilder {
inline uint16_t get_composite_output_y()
{
return _composite_src_output_y % IntermediateBufferHeight;
return (uint16_t)_composite_src_output_y;
}
inline bool composite_output_buffer_is_full()