merged all drawing functions into a single shader processing function

app/render/backend/renderer.cpp

@@ -20,6 +20,13 @@
 
 #include "renderer.h"
 
+#include <OpenColorIO/OpenColorIO.h>
+namespace OCIO = OCIO_NAMESPACE::v1;
+
+#include <QFloat16>
+
+#include "render/colormanager.h"
+
 OLIVE_NAMESPACE_ENTER
 
 Renderer::Renderer(QObject *parent) :
@@ -39,4 +46,91 @@ Renderer::TexturePtr Renderer::CreateTexture(const VideoParams &param, void *dat
   return std::make_shared<Texture>(this, v, param);
 }
 
+// copied from source code to OCIODisplay
+/*const int OCIO_LUT3D_EDGE_SIZE = 64;
+
+const int OCIO_LUT3D_PIXEL_COUNT = OCIO_LUT3D_EDGE_SIZE*OCIO_LUT3D_EDGE_SIZE*OCIO_LUT3D_EDGE_SIZE;
+const int OCIO_LUT3D_ENTRY_COUNT = 3 * OCIO_LUT3D_PIXEL_COUNT;
+const int OCIO_LUT3D_ENTRY_COUNT_WITH_ALPHA = 4 * OCIO_LUT3D_PIXEL_COUNT;
+const int OCIO_LUT2D_EDGE_SIZE = 512;*/
+
+void Renderer::BlitColorManaged(ColorProcessorPtr color_processor, TexturePtr source, Texture *destination)
+{
+  /*ColorContext color_ctx;
+
+  if (color_cache_.contains(color_processor->id())) {
+    color_ctx = color_cache_.value(color_processor->id());
+  } else {
+    // Generate OCIO color context
+
+    // Generate OCIO shader descriptor
+    const char* ocio_func_name = "OCIODisplay";
+    OCIO::GpuShaderDesc shader_desc;
+    shader_desc.setLanguage(OCIO::GPU_LANGUAGE_GLSL_1_0);
+    shader_desc.setFunctionName(ocio_func_name);
+    shader_desc.setLut3DEdgeLen(OCIO_LUT3D_EDGE_SIZE);
+
+    // Generate LUT
+    QVector<float> lut_data(OCIO_LUT3D_ENTRY_COUNT);
+    color_processor->GetProcessor()->getGpuLut3D(lut_data.data(), shader_desc);
+
+    // Convert to half float RGBA
+    QVector<qfloat16> texture_ready_lut_data(OCIO_LUT3D_ENTRY_COUNT_WITH_ALPHA);
+    for (int i=0; i<OCIO_LUT3D_PIXEL_COUNT; i++) {
+      texture_ready_lut_data[i*kRGBAChannels+0] = lut_data[i*kRGBChannels+0];
+      texture_ready_lut_data[i*kRGBAChannels+1] = lut_data[i*kRGBChannels+1];
+      texture_ready_lut_data[i*kRGBAChannels+2] = lut_data[i*kRGBChannels+2];
+      texture_ready_lut_data[i*kRGBAChannels+3] = 1.0f;
+    }
+
+    // Create LUT texture
+    color_ctx.lut = CreateTexture(VideoParams(OCIO_LUT2D_EDGE_SIZE, OCIO_LUT2D_EDGE_SIZE, PixelFormat::PIX_FMT_RGBA32F),
+                                  texture_ready_lut_data.data());
+
+    // Create shader
+    QString frag_code;
+
+    frag_code.append(QStringLiteral("sampler2D texture;\n"
+                                    "sampler2D lut;\n"
+                                    "\n"
+                                    "vec3 LUTLookup(sampler2D lut3d, vec3 in_coord)\n"
+                                    "{\n"
+                                    "  return texture2D(lut3d, vec2());\n"
+                                    "}\n"
+                                    "\n"));
+
+    // Correct code for our GLSL set up
+    QString ocio_code = color_processor->GetProcessor()->getGpuShaderText(shader_desc);
+    ocio_code.replace(QStringLiteral("texture3D"), QStringLiteral("texture2D"));
+    ocio_code.replace(QStringLiteral("sampler3D"), QStringLiteral("sampler2D"));
+
+
+
+    qDebug() << frag_code;
+
+    //qDebug() << "FIXME: GPU doesn't handle associated alpha yet";
+  }*/
+
+  qDebug() << "BlitColorManaged is a partial stub";
+
+  QVariant shader = CreateNativeShader(ShaderCode(FileFunctions::ReadFileAsString(":/shaders/default.frag"), FileFunctions::ReadFileAsString(":/shaders/default.vert")));
+
+  ShaderJob job;
+  job.InsertValue(QStringLiteral("ove_maintex"), ShaderValue(QVariant::fromValue(source), NodeParam::kTexture));
+
+  BlitToTexture(shader, job, destination);
+}
+
+void Renderer::BlitColorManaged(ColorProcessorPtr color_processor, TexturePtr source, VideoParams params)
+{
+  qDebug() << "BlitColorManaged is a partial stub";
+
+  QVariant shader = CreateNativeShader(ShaderCode(FileFunctions::ReadFileAsString(":/shaders/default.frag"), FileFunctions::ReadFileAsString(":/shaders/default.vert")));
+
+  ShaderJob job;
+  job.InsertValue(QStringLiteral("ove_maintex"), ShaderValue(QVariant::fromValue(source), NodeParam::kTexture));
+
+  Blit(shader, job, params);
+}
+
 OLIVE_NAMESPACE_EXIT