enforce trilinear and mipmap generation

rendering/exportthread.cpp

@@ -574,7 +574,7 @@ void ExportThread::Export()
     return;
   }
 
-  // Flush remaining packets out of video and audio encoders
+  // Flush remaining packets out of video and audio encoders by sending a null frame
   if (params_.video_enabled) {
     Encode(fmt_ctx, vcodec_ctx, nullptr, &video_pkt, video_stream);
   }

rendering/framebufferobject.cpp

@@ -26,37 +26,39 @@ void FramebufferObject::Create(QOpenGLContext *ctx, int width, int height)
   // set context to new context provided
   ctx_ = ctx;
 
+  QOpenGLFunctions* f = ctx->functions();
+
   // create framebuffer object
-  ctx->functions()->glGenFramebuffers(1, &buffer_);
+  f->glGenFramebuffers(1, &buffer_);
 
   // create texture
-  ctx->functions()->glGenTextures(1, &texture_);
+  f->glGenTextures(1, &texture_);
 
   // bind framebuffer for attaching
-  ctx->functions()->glBindFramebuffer(GL_DRAW_FRAMEBUFFER, buffer_);
+  f->glBindFramebuffer(GL_DRAW_FRAMEBUFFER, buffer_);
 
   // bind texture
-  ctx->functions()->glBindTexture(GL_TEXTURE_2D, texture_);
+  f->glBindTexture(GL_TEXTURE_2D, texture_);
 
   // allocate storage for texture
-  ctx->functions()->glTexImage2D(
+  f->glTexImage2D(
         GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr
         );
 
   // set texture filtering to bilinear
-  ctx->functions()->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-  ctx->functions()->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+  f->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+  f->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 
   // attach texture to framebuffer
-  ctx->functions()->glFramebufferTexture2D(
+  f->glFramebufferTexture2D(
         GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture_, 0
         );
 
   // release texture
-  ctx->functions()->glBindTexture(GL_TEXTURE_2D, 0);
+  f->glBindTexture(GL_TEXTURE_2D, 0);
 
   // release framebuffer
-  ctx->functions()->glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
+  f->glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
 }
 
 void FramebufferObject::Destroy()

rendering/renderfunctions.cpp

@@ -51,7 +51,17 @@ namespace OCIO = OCIO_NAMESPACE;
 #include "panels/timeline.h"
 #include "panels/viewer.h"
 
+void PrepareToDraw(QOpenGLFunctions* f) {
+  f->glGenerateMipmap(GL_TEXTURE_2D);
+  f->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+  f->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+  f->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
+  f->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
+}
+
 void full_blit() {
+  PrepareToDraw(QOpenGLContext::currentContext()->functions());
+
   glPushMatrix();
   glLoadIdentity();
   glOrtho(0, 1, 0, 1, -1, 1);
@@ -484,9 +494,7 @@ GLuint olive::rendering::compose_sequence(ComposeSequenceParams &params) {
             glBindTexture(GL_TEXTURE_2D, textureID);
 
             // set texture filter to bilinear
-            params.ctx->functions()->glGenerateMipmap(GL_TEXTURE_2D);
-            params.ctx->functions()->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
-            params.ctx->functions()->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+            PrepareToDraw(params.ctx->functions());
 
             // draw clip on screen according to gl coordinates
             glBegin(GL_QUADS);