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https://github.com/dolphin-emu/dolphin.git
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360 lines
10 KiB
C++
360 lines
10 KiB
C++
// Copyright 2013 Dolphin Emulator Project
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// Licensed under GPLv2
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// Refer to the license.txt file included.
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#include "Common/CommonPaths.h"
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#include "Common/FileUtil.h"
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#include "Common/StringUtil.h"
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#include "VideoBackends/OGL/FramebufferManager.h"
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#include "VideoBackends/OGL/GLUtil.h"
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#include "VideoBackends/OGL/PostProcessing.h"
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#include "VideoBackends/OGL/ProgramShaderCache.h"
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#include "VideoCommon/DriverDetails.h"
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#include "VideoCommon/VideoCommon.h"
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#include "VideoCommon/VideoConfig.h"
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namespace OGL
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{
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static char s_vertex_workaround_shader[] =
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"in vec4 rawpos;\n"
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"out vec2 uv0;\n"
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"uniform vec4 src_rect;\n"
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"void main(void) {\n"
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" gl_Position = vec4(rawpos.xy, 0.0, 1.0);\n"
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" uv0 = rawpos.zw * src_rect.zw + src_rect.xy;\n"
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"}\n";
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static char s_vertex_shader[] =
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"out vec2 uv0;\n"
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"uniform vec4 src_rect;\n"
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"void main(void) {\n"
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" vec2 rawpos = vec2(gl_VertexID&1, gl_VertexID&2);\n"
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" gl_Position = vec4(rawpos*2.0-1.0, 0.0, 1.0);\n"
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" uv0 = rawpos * src_rect.zw + src_rect.xy;\n"
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"}\n";
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// Anaglyph Red-Cyan shader based on Dubois algorithm
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// Constants taken from the paper:
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// "Conversion of a Stereo Pair to Anaglyph with
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// the Least-Squares Projection Method"
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// Eric Dubois, March 2009
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static char s_anaglyph_shader[] =
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"void main() {\n"
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" vec3 l = SampleLayer(0).rgb;\n"
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" vec3 r = SampleLayer(1).rgb;\n"
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" vec3 lr = vec3(0.437,0.449,0.164);\n"
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" vec3 lg = vec3(-0.062,-0.062,-0.024);\n"
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" vec3 lb = vec3(-0.048,-0.050,-0.017);\n"
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" vec3 rr = vec3(-0.011,-0.032,-0.007);\n"
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" vec3 rg = vec3(0.377,0.761,0.009);\n"
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" vec3 rb = vec3(-0.026,-0.093,1.234);\n"
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" vec3 c0 = vec3(dot(l, lr), dot(l, lg), dot(l, lb));\n"
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" vec3 c1 = vec3(dot(r, rr), dot(r, rg), dot(r, rb));\n"
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" SetOutput(vec4(c0 + c1, SampleLayer(0).a));\n"
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"}\n";
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static const char s_default_shader[] = "void main() { SetOutput(Sample()); }\n";
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OpenGLPostProcessing::OpenGLPostProcessing()
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: m_initialized(false)
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, m_anaglyph(false)
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{
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CreateHeader();
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m_attribute_workaround = DriverDetails::HasBug(DriverDetails::BUG_BROKENATTRIBUTELESS);
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if (m_attribute_workaround)
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{
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glGenBuffers(1, &m_attribute_vbo);
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glGenVertexArrays(1, &m_attribute_vao);
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}
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}
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OpenGLPostProcessing::~OpenGLPostProcessing()
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{
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m_shader.Destroy();
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if (m_attribute_workaround)
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{
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glDeleteBuffers(1, &m_attribute_vbo);
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glDeleteVertexArrays(1, &m_attribute_vao);
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}
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}
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void OpenGLPostProcessing::BlitFromTexture(TargetRectangle src, TargetRectangle dst,
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int src_texture, int src_width, int src_height, int layer)
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{
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ApplyShader();
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glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
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glViewport(dst.left, dst.bottom, dst.GetWidth(), dst.GetHeight());
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if (m_attribute_workaround)
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glBindVertexArray(m_attribute_vao);
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else
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OpenGL_BindAttributelessVAO();
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m_shader.Bind();
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glUniform4f(m_uniform_resolution, (float)src_width, (float)src_height, 1.0f / (float)src_width, 1.0f / (float)src_height);
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glUniform4f(m_uniform_src_rect, src.left / (float) src_width, src.bottom / (float) src_height,
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src.GetWidth() / (float) src_width, src.GetHeight() / (float) src_height);
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glUniform1ui(m_uniform_time, (GLuint)m_timer.GetTimeElapsed());
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glUniform1i(m_uniform_layer, layer);
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if (m_config.IsDirty())
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{
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for (auto& it : m_config.GetOptions())
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{
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if (it.second.m_dirty)
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{
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switch (it.second.m_type)
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{
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case PostProcessingShaderConfiguration::ConfigurationOption::OptionType::OPTION_BOOL:
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glUniform1i(m_uniform_bindings[it.first], it.second.m_bool_value);
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break;
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case PostProcessingShaderConfiguration::ConfigurationOption::OptionType::OPTION_INTEGER:
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switch (it.second.m_integer_values.size())
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{
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case 1:
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glUniform1i(m_uniform_bindings[it.first], it.second.m_integer_values[0]);
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break;
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case 2:
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glUniform2i(m_uniform_bindings[it.first],
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it.second.m_integer_values[0],
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it.second.m_integer_values[1]);
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break;
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case 3:
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glUniform3i(m_uniform_bindings[it.first],
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it.second.m_integer_values[0],
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it.second.m_integer_values[1],
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it.second.m_integer_values[2]);
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break;
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case 4:
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glUniform4i(m_uniform_bindings[it.first],
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it.second.m_integer_values[0],
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it.second.m_integer_values[1],
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it.second.m_integer_values[2],
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it.second.m_integer_values[3]);
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break;
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}
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break;
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case PostProcessingShaderConfiguration::ConfigurationOption::OptionType::OPTION_FLOAT:
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switch (it.second.m_float_values.size())
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{
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case 1:
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glUniform1f(m_uniform_bindings[it.first], it.second.m_float_values[0]);
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break;
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case 2:
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glUniform2f(m_uniform_bindings[it.first],
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it.second.m_float_values[0],
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it.second.m_float_values[1]);
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break;
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case 3:
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glUniform3f(m_uniform_bindings[it.first],
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it.second.m_float_values[0],
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it.second.m_float_values[1],
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it.second.m_float_values[2]);
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break;
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case 4:
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glUniform4f(m_uniform_bindings[it.first],
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it.second.m_float_values[0],
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it.second.m_float_values[1],
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it.second.m_float_values[2],
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it.second.m_float_values[3]);
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break;
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}
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break;
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}
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it.second.m_dirty = false;
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}
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}
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m_config.SetDirty(false);
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}
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glActiveTexture(GL_TEXTURE0+9);
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glBindTexture(GL_TEXTURE_2D_ARRAY, src_texture);
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glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
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}
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void OpenGLPostProcessing::ApplyShader()
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{
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// shader didn't changed
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if (m_initialized && m_config.GetShader() == g_ActiveConfig.sPostProcessingShader &&
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((g_ActiveConfig.iStereoMode == STEREO_ANAGLYPH) == m_anaglyph))
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return;
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m_shader.Destroy();
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m_uniform_bindings.clear();
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// load shader code
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std::string code = "";
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if (g_ActiveConfig.iStereoMode == STEREO_ANAGLYPH)
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code = s_anaglyph_shader;
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else if (g_ActiveConfig.sPostProcessingShader != "")
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code = m_config.LoadShader();
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if (code == "")
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code = s_default_shader;
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code = LoadShaderOptions(code);
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const char* vertex_shader = s_vertex_shader;
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if (m_attribute_workaround)
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vertex_shader = s_vertex_workaround_shader;
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// and compile it
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if (!ProgramShaderCache::CompileShader(m_shader, vertex_shader, code.c_str()))
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{
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ERROR_LOG(VIDEO, "Failed to compile post-processing shader %s", m_config.GetShader().c_str());
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code = LoadShaderOptions(s_default_shader);
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ProgramShaderCache::CompileShader(m_shader, vertex_shader, code.c_str());
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}
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// read uniform locations
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m_uniform_resolution = glGetUniformLocation(m_shader.glprogid, "resolution");
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m_uniform_time = glGetUniformLocation(m_shader.glprogid, "time");
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m_uniform_src_rect = glGetUniformLocation(m_shader.glprogid, "src_rect");
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m_uniform_layer = glGetUniformLocation(m_shader.glprogid, "layer");
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if (m_attribute_workaround)
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{
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GLfloat vertices[] = {
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-1.f, -1.f, 0.f, 0.f,
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1.f, -1.f, 1.f, 0.f,
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-1.f, 1.f, 0.f, 1.f,
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1.f, 1.f, 1.f, 1.f,
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};
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glBindBuffer(GL_ARRAY_BUFFER, m_attribute_vbo);
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glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
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glBindVertexArray(m_attribute_vao);
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glEnableVertexAttribArray(SHADER_POSITION_ATTRIB);
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glVertexAttribPointer(SHADER_POSITION_ATTRIB, 4, GL_FLOAT, 0, 0, nullptr);
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}
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for (const auto& it : m_config.GetOptions())
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{
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std::string glsl_name = "option_" + it.first;
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m_uniform_bindings[it.first] = glGetUniformLocation(m_shader.glprogid, glsl_name.c_str());
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}
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m_anaglyph = g_ActiveConfig.iStereoMode == STEREO_ANAGLYPH;
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m_initialized = true;
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}
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void OpenGLPostProcessing::CreateHeader()
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{
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m_glsl_header =
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// Required variables
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// Shouldn't be accessed directly by the PP shader
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// Texture sampler
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"SAMPLER_BINDING(8) uniform sampler2D samp8;\n"
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"SAMPLER_BINDING(9) uniform sampler2DArray samp9;\n"
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// Output variable
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"out float4 ocol0;\n"
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// Input coordinates
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"in float2 uv0;\n"
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// Resolution
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"uniform float4 resolution;\n"
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// Time
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"uniform uint time;\n"
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// Layer
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"uniform int layer;\n"
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// Interfacing functions
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"float4 Sample()\n"
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"{\n"
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"\treturn texture(samp9, float3(uv0, layer));\n"
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"}\n"
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"float4 SampleLocation(float2 location)\n"
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"{\n"
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"\treturn texture(samp9, float3(location, layer));\n"
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"}\n"
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"float4 SampleLayer(int layer)\n"
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"{\n"
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"\treturn texture(samp9, float3(uv0, layer));\n"
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"}\n"
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"#define SampleOffset(offset) textureOffset(samp9, float3(uv0, layer), offset)\n"
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"float4 SampleFontLocation(float2 location)\n"
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"{\n"
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"\treturn texture(samp8, location);\n"
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"}\n"
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"float2 GetResolution()\n"
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"{\n"
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"\treturn resolution.xy;\n"
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"}\n"
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"float2 GetInvResolution()\n"
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"{\n"
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"\treturn resolution.zw;\n"
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"}\n"
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"float2 GetCoordinates()\n"
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"{\n"
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"\treturn uv0;\n"
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"}\n"
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"uint GetTime()\n"
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"{\n"
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"\treturn time;\n"
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"}\n"
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"void SetOutput(float4 color)\n"
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"{\n"
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"\tocol0 = color;\n"
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"}\n"
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"#define GetOption(x) (option_##x)\n"
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"#define OptionEnabled(x) (option_##x != 0)\n";
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}
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std::string OpenGLPostProcessing::LoadShaderOptions(const std::string& code)
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{
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std::string glsl_options = "";
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m_uniform_bindings.clear();
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for (const auto& it : m_config.GetOptions())
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{
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if (it.second.m_type == PostProcessingShaderConfiguration::ConfigurationOption::OptionType::OPTION_BOOL)
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{
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glsl_options += StringFromFormat("uniform int option_%s;\n", it.first.c_str());
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}
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else if (it.second.m_type == PostProcessingShaderConfiguration::ConfigurationOption::OptionType::OPTION_INTEGER)
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{
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u32 count = static_cast<u32>(it.second.m_integer_values.size());
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if (count == 1)
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glsl_options += StringFromFormat("uniform int option_%s;\n", it.first.c_str());
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else
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glsl_options += StringFromFormat("uniform int%d option_%s;\n", count, it.first.c_str());
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}
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else if (it.second.m_type == PostProcessingShaderConfiguration::ConfigurationOption::OptionType::OPTION_FLOAT)
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{
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u32 count = static_cast<u32>(it.second.m_float_values.size());
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if (count == 1)
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glsl_options += StringFromFormat("uniform float option_%s;\n", it.first.c_str());
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else
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glsl_options += StringFromFormat("uniform float%d option_%s;\n", count, it.first.c_str());
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}
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m_uniform_bindings[it.first] = 0;
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}
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return m_glsl_header + glsl_options + code;
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}
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} // namespace OGL
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