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Added blanking source runs, ensuring the rolling buffer is appropriately cleared.

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This commit is contained in:
Thomas Harte 2016-04-17 20:34:52 -04:00
parent 43cae267f9
commit 9ede284eb6
3 changed files with 34 additions and 18 deletions
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14
Outputs/CRT/CRT.cpp
View File

@ -105,8 +105,9 @@ Flywheel::SyncEvent CRT::get_next_horizontal_sync_event(bool hsync_is_requested,
#define source_input_position_y(v) (*(uint16_t *)&next_run[SourceVertexSize*v + SourceVertexOffsetOfInputPosition + 2])
#define source_output_position_x(v) (*(uint16_t *)&next_run[SourceVertexSize*v + SourceVertexOffsetOfOutputPosition + 0])
#define source_output_position_y(v) (*(uint16_t *)&next_run[SourceVertexSize*v + SourceVertexOffsetOfOutputPosition + 2])
#define source_phase(v) next_run[SourceVertexSize*v + SourceVertexOffsetOfPhaseAndAmplitude + 0]
#define source_amplitude(v) next_run[SourceVertexSize*v + SourceVertexOffsetOfPhaseAndAmplitude + 1]
#define source_phase(v) next_run[SourceVertexSize*v + SourceVertexOffsetOfPhaseAmplitudeAndAlpha + 0]
#define source_amplitude(v) next_run[SourceVertexSize*v + SourceVertexOffsetOfPhaseAmplitudeAndAlpha + 1]
#define source_alpha(v) next_run[SourceVertexSize*v + SourceVertexOffsetOfPhaseAmplitudeAndAlpha + 2]
#define source_phase_time(v) (*(uint16_t *)&next_run[SourceVertexSize*v + SourceVertexOffsetOfPhaseTime])
void CRT::advance_cycles(unsigned int number_of_cycles, unsigned int source_divider, bool hsync_requested, bool vsync_requested, const bool vsync_charging, const Scan::Type type, uint16_t tex_x, uint16_t tex_y)
@ -165,6 +166,7 @@ void CRT::advance_cycles(unsigned int number_of_cycles, unsigned int source_divi
source_phase(0) = source_phase(1) = _colour_burst_phase;
source_amplitude(0) = source_amplitude(1) = _colour_burst_amplitude;
source_phase_time(0) = source_phase_time(1) = _colour_burst_time;
source_alpha(0) = source_alpha(1) = 255;
}
}
@ -243,6 +245,14 @@ void CRT::advance_cycles(unsigned int number_of_cycles, unsigned int source_divi
if(next_run_length == time_until_horizontal_sync_event && next_horizontal_sync_event == Flywheel::SyncEvent::EndRetrace)
{
_openGL_output_builder->increment_composite_output_y();
// store a run to clear the new line
next_run = _openGL_output_builder->get_next_source_run();
source_output_position_x(0) = 0;
source_output_position_x(1) = IntermediateBufferWidth;
source_output_position_y(0) = source_output_position_y(1) = _openGL_output_builder->get_composite_output_y();
source_alpha(0) = source_alpha(1) = 0;
_openGL_output_builder->complete_source_run();
}
}

2
Outputs/CRT/Internals/CRTConstants.hpp
View File

@ -29,7 +29,7 @@ const size_t OutputVertexSize = 16;
// remapping occurs to ensure a continous stream of data for each scan, giving correct out-of-bounds behaviour
const size_t SourceVertexOffsetOfInputPosition = 0;
const size_t SourceVertexOffsetOfOutputPosition = 4;
const size_t SourceVertexOffsetOfPhaseAndAmplitude = 8;
const size_t SourceVertexOffsetOfPhaseAmplitudeAndAlpha = 8;
const size_t SourceVertexOffsetOfPhaseTime = 12;
const size_t SourceVertexSize = 16;

36
Outputs/CRT/Internals/CRTOpenGL.cpp
View File

@ -147,7 +147,7 @@ void OpenGLOutputBuilder::draw_frame(unsigned int output_width, unsigned int out
prepare_composite_input_shader();
prepare_source_vertex_array();
prepare_composite_output_shader();
// prepare_composite_output_shader();
prepare_rgb_output_shader();
prepare_output_vertex_array();
@ -201,7 +201,7 @@ void OpenGLOutputBuilder::draw_frame(unsigned int output_width, unsigned int out
{
composite_input_shader_program->bind();
compositeTexture->bind_framebuffer();
// compositeTexture->bind_framebuffer();
glBindFramebuffer(GL_FRAMEBUFFER, defaultFramebuffer);
glBindVertexArray(source_vertex_array);
@ -230,7 +230,7 @@ void OpenGLOutputBuilder::draw_frame(unsigned int output_width, unsigned int out
}
// transfer to screen
perform_output_stage(output_width, output_height, rgb_shader_program.get());
// perform_output_stage(output_width, output_height, rgb_shader_program.get());
}
else
perform_output_stage(output_width, output_height, rgb_shader_program.get());
@ -255,6 +255,7 @@ void OpenGLOutputBuilder::perform_output_stage(unsigned int output_width, unsign
// update uniforms
push_size_uniforms(output_width, output_height);
glViewport(0, 0, (GLsizei)output_width, (GLsizei)output_height);
// Ensure we're back on the output framebuffer, drawing from the output array buffer
glBindFramebuffer(GL_FRAMEBUFFER, defaultFramebuffer);
@ -342,7 +343,7 @@ char *OpenGLOutputBuilder::get_input_vertex_shader()
"in vec2 inputPosition;"
"in vec2 outputPosition;"
"in vec2 phaseAndAmplitude;"
"in vec3 phaseAmplitudeAndAlpha;"
"in float phaseTime;"
"uniform float phaseCyclesPerTick;"
@ -351,15 +352,18 @@ char *OpenGLOutputBuilder::get_input_vertex_shader()
"out vec2 inputPositionVarying;"
"out float phaseVarying;"
"out float alphaVarying;"
"void main(void)"
"{"
"ivec2 textureSize = textureSize(texID, 0);"
"inputPositionVarying = vec2(inputPosition.x / textureSize.x, (inputPosition.y + 0.5) / textureSize.y);"
"phaseVarying = (phaseCyclesPerTick * phaseTime + phaseAmplitudeAndAlpha.x) * 2.0 * 3.141592654;"
"alphaVarying = phaseAmplitudeAndAlpha.z;"
"vec2 eyePosition = 2.0*(outputPosition / outputTextureSize) - vec2(1.0);"
"gl_Position = vec4(eyePosition, 0.0, 1.0);"
"phaseVarying = (phaseCyclesPerTick * phaseTime + phaseAndAmplitude.x) * 2.0 * 3.141592654;"
"}");
}
@ -377,6 +381,7 @@ char *OpenGLOutputBuilder::get_input_fragment_shader()
"in vec2 inputPositionVarying;"
"in float phaseVarying;"
"in float alphaVarying;"
"out vec4 fragColour;"
@ -386,7 +391,7 @@ char *OpenGLOutputBuilder::get_input_fragment_shader()
"void main(void)"
"{"
"fragColour = vec4(rgb_sample(texID, inputPositionVarying, inputPositionVarying), 1.0);" // composite
"fragColour = vec4(rgb_sample(texID, inputPositionVarying, inputPositionVarying) * alphaVarying, 1.0);" // composite
"}"
, composite_shader);
}
@ -537,24 +542,24 @@ void OpenGLOutputBuilder::prepare_source_vertex_array()
{
if(composite_input_shader_program)
{
GLint inputPositionAttribute = composite_input_shader_program->get_attrib_location("inputPosition");
GLint outputPositionAttribute = composite_input_shader_program->get_attrib_location("outputPosition");
GLint phaseAndAmplitudeAttribute = composite_input_shader_program->get_attrib_location("phaseAndAmplitude");
GLint phaseTimeAttribute = composite_input_shader_program->get_attrib_location("phaseTime");
GLint inputPositionAttribute = composite_input_shader_program->get_attrib_location("inputPosition");
GLint outputPositionAttribute = composite_input_shader_program->get_attrib_location("outputPosition");
GLint phaseAmplitudeAndAlphaAttribute = composite_input_shader_program->get_attrib_location("phaseAmplitudeAndAlpha");
GLint phaseTimeAttribute = composite_input_shader_program->get_attrib_location("phaseTime");
glBindVertexArray(source_vertex_array);
glEnableVertexAttribArray((GLuint)inputPositionAttribute);
glEnableVertexAttribArray((GLuint)outputPositionAttribute);
glEnableVertexAttribArray((GLuint)phaseAndAmplitudeAttribute);
glEnableVertexAttribArray((GLuint)phaseAmplitudeAndAlphaAttribute);
glEnableVertexAttribArray((GLuint)phaseTimeAttribute);
const GLsizei vertexStride = SourceVertexSize;
glBindBuffer(GL_ARRAY_BUFFER, source_array_buffer);
glVertexAttribPointer((GLuint)inputPositionAttribute, 2, GL_UNSIGNED_SHORT, GL_FALSE, vertexStride, (void *)SourceVertexOffsetOfInputPosition);
glVertexAttribPointer((GLuint)outputPositionAttribute, 2, GL_UNSIGNED_SHORT, GL_FALSE, vertexStride, (void *)SourceVertexOffsetOfOutputPosition);
glVertexAttribPointer((GLuint)phaseAndAmplitudeAttribute, 2, GL_UNSIGNED_BYTE, GL_TRUE, vertexStride, (void *)SourceVertexOffsetOfPhaseAndAmplitude);
glVertexAttribPointer((GLuint)phaseTimeAttribute, 2, GL_UNSIGNED_SHORT, GL_FALSE, vertexStride, (void *)SourceVertexOffsetOfPhaseTime);
glVertexAttribPointer((GLuint)inputPositionAttribute, 2, GL_UNSIGNED_SHORT, GL_FALSE, vertexStride, (void *)SourceVertexOffsetOfInputPosition);
glVertexAttribPointer((GLuint)outputPositionAttribute, 2, GL_UNSIGNED_SHORT, GL_FALSE, vertexStride, (void *)SourceVertexOffsetOfOutputPosition);
glVertexAttribPointer((GLuint)phaseAmplitudeAndAlphaAttribute, 3, GL_UNSIGNED_BYTE, GL_TRUE, vertexStride, (void *)SourceVertexOffsetOfPhaseAmplitudeAndAlpha);
glVertexAttribPointer((GLuint)phaseTimeAttribute, 2, GL_UNSIGNED_SHORT, GL_FALSE, vertexStride, (void *)SourceVertexOffsetOfPhaseTime);
}
}
@ -643,6 +648,7 @@ void OpenGLOutputBuilder::prepare_rgb_output_shader()
void OpenGLOutputBuilder::prepare_composite_output_shader()
{
// rgb_shader_program = prepare_output_shader(get_composite_output_fragment_shader());
composite_output_shader_program = prepare_output_shader(get_composite_output_fragment_shader());
}