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Proven through deliberate inefficiency: the issues are (i) texture upload; and (ii) buffer wraparound.

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This commit is contained in:
Thomas Harte 2016-05-03 22:22:12 -04:00
parent 759fbd89ca
commit 3684c6404f
3 changed files with 15 additions and 10 deletions
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4
Outputs/CRT/Internals/CRTConstants.hpp
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@ -40,8 +40,8 @@ const GLsizei IntermediateBufferWidth = 2048;
const GLsizei IntermediateBufferHeight = 2048;
// Some internal buffer sizes
const GLsizeiptr OutputVertexBufferDataSize = 59904; // a multiple of 6 * OutputVertexSize
const GLsizeiptr SourceVertexBufferDataSize = 87360; // a multiple of 2 * SourceVertexSize
const GLsizeiptr OutputVertexBufferDataSize = 5990400; // a multiple of 6 * OutputVertexSize
const GLsizeiptr SourceVertexBufferDataSize = 8736000; // a multiple of 2 * SourceVertexSize
}
}

2
Outputs/CRT/Internals/CRTInputBufferBuilder.hpp
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@ -46,7 +46,7 @@ struct CRTInputBufferBuilder {
inline uint16_t get_last_write_y_position()
{
return _write_y_position;
return _write_y_position % InputBufferBuilderHeight;
}
inline size_t get_bytes_per_pixel()

19
Outputs/CRT/Internals/CRTOpenGL.cpp
View File

@ -270,14 +270,19 @@ void OpenGLOutputBuilder::draw_frame(unsigned int output_width, unsigned int out
}
// upload new source pixels
glActiveTexture(source_data_texture_unit);
for(int c = 0; c < number_of_texture_upload_zones; c++)
if(number_of_texture_upload_zones)
{
glTexSubImage2D( GL_TEXTURE_2D, 0,
0, texture_upload_zones[c*2],
InputBufferBuilderWidth, texture_upload_zones[c*2 + 1],
formatForDepth(_buffer_builder->get_bytes_per_pixel()), GL_UNSIGNED_BYTE,
(void *)((size_t)texture_upload_zones[c*2] * InputBufferBuilderWidth * _buffer_builder->get_bytes_per_pixel()));
glActiveTexture(source_data_texture_unit);
glTexImage2D(GL_TEXTURE_2D, 0, internalFormatForDepth(_buffer_builder->get_bytes_per_pixel()), InputBufferBuilderWidth, InputBufferBuilderHeight, 0, formatForDepth(_buffer_builder->get_bytes_per_pixel()), GL_UNSIGNED_BYTE, (void *)0);
// for(int c = 0; c < number_of_texture_upload_zones; c++)
// {
// glTexSubImage2D( GL_TEXTURE_2D, 0,
// 0, texture_upload_zones[c*2],
// InputBufferBuilderWidth, texture_upload_zones[c*2 + 1],
// formatForDepth(_buffer_builder->get_bytes_per_pixel()), GL_UNSIGNED_BYTE,
// (void *)((size_t)texture_upload_zones[c*2] * InputBufferBuilderWidth * _buffer_builder->get_bytes_per_pixel()));
// }
// glFinish();
}
struct RenderStage {