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Introduce line blending.

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This commit is contained in:
Thomas Harte
2026-02-05 17:12:39 -05:00
parent 8259437275
commit 83231821cf
4 changed files with 15 additions and 8 deletions
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5
Outputs/OpenGL/ScanTarget.cpp
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@@ -244,6 +244,7 @@ void ScanTarget::setup_pipeline() {
modals.expected_vertical_lines,
modals.output_scale.x,
modals.output_scale.y,
0.64f,
lines_,
DemodulationTextureUnit
);
@@ -415,7 +416,7 @@ void ScanTarget::update(const int output_width, const int output_height) {
output_buffer_height,
OutputTextureUnit,
GL_NEAREST,
false // TODO: should probably be true, if I'm going to use stencil (?)
true
);
}
@@ -493,7 +494,9 @@ void ScanTarget::update(const int output_width, const int output_height) {
// Output new lines.
line_output_shader_.bind();
output_buffer_.bind_framebuffer();
test_gl([&]{ glEnable(GL_BLEND); });
test_gl([&]{ glDrawArraysInstanced(GL_TRIANGLE_STRIP, 0, 4, GLsizei(new_lines)); });
test_gl([&]{ glDisable(GL_BLEND); });
// TODO: end-of-frame blanking of untouched areas.