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Updated outdated comments.

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This commit is contained in:
Thomas Harte 2016-11-21 11:40:13 +08:00
parent d7d0ed378a
commit 7b38247ab3
1 changed files with 11 additions and 7 deletions
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18
Outputs/CRT/Internals/CRTOpenGL.cpp
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@ -132,6 +132,7 @@ void OpenGLOutputBuilder::draw_frame(unsigned int output_width, unsigned int out
float clear_colour[3];
};
// for composite video, go through four steps to get to something that can be painted to the output
RenderStage composite_render_stages[] =
{
{compositeTexture.get(), composite_input_shader_program.get(), {0.0, 0.0, 0.0}},
@ -141,6 +142,7 @@ void OpenGLOutputBuilder::draw_frame(unsigned int output_width, unsigned int out
{nullptr}
};
// for RGB video, there's only two steps
RenderStage rgb_render_stages[] =
{
{compositeTexture.get(), rgb_input_shader_program.get(), {0.0, 0.0, 0.0}},
@ -150,7 +152,6 @@ void OpenGLOutputBuilder::draw_frame(unsigned int output_width, unsigned int out
RenderStage *active_pipeline = (_output_device == Television || !rgb_input_shader_program) ? composite_render_stages : rgb_render_stages;
// for television, update intermediate buffers and then draw; for a monitor, just draw
if(array_submission.input_size || array_submission.output_size)
{
// all drawing will be from the source vertex array and without blending
@ -159,29 +160,32 @@ void OpenGLOutputBuilder::draw_frame(unsigned int output_width, unsigned int out
while(active_pipeline->target)
{
// switch to the initial texture
// switch to the framebuffer and shader associated with this stage
active_pipeline->shader->bind();
active_pipeline->target->bind_framebuffer();
// if this is the final stage before painting to the CRT, clear the framebuffer before drawing in order to blank out
// those portions for which no input was provided
if(!active_pipeline[1].target)
{
glClearColor(active_pipeline->clear_colour[0], active_pipeline->clear_colour[1], active_pipeline->clear_colour[2], 1.0f);
glClear(GL_COLOR_BUFFER_BIT);
}
active_pipeline->shader->bind();
// draw as desired
// draw
glDrawArraysInstanced(GL_LINES, 0, 2, (GLsizei)array_submission.input_size / SourceVertexSize);
active_pipeline++;
}
// transfer to framebuffer
// prepare to transfer to framebuffer
framebuffer->bind_framebuffer();
// draw from from the output array buffer with blending
// draw from the output array buffer, with blending
glBindVertexArray(output_vertex_array);
glEnable(GL_BLEND);
// update uniforms, then bind the thing
// update uniforms, then bind the target
if(_last_output_width != output_width || _last_output_height != output_height)
{
output_shader_program->set_output_size(output_width, output_height, _visible_area);