Make it possible to specify explicit clear values

[libs/gl.git] / source / render / sequence.cpp

diff --git a/source/render/sequence.cpp b/source/render/sequence.cpp
index d5b3ae94f9634a827865d9cdec0c11d2224fbb22..7a964c870d39e2bbe40a9cbf4a2571d1e1f40843 100644 (file)
--- a/source/render/sequence.cpp
+++ b/source/render/sequence.cpp
@@ -13,29 +13,35 @@ using namespace std;
 namespace Msp {
 namespace GL {
 
+Sequence::Sequence():
+       width(0),
+       height(0),
+       target{0, 0},
+       target_ms(0),
+       clear_enabled(false),
+       clear_depth(1.0f),
+       clear_stencil(0)
+{ }
+
 Sequence::Sequence(unsigned w, unsigned h, const FrameFormat &f):
        width(w),
        height(h),
-       target_format(f)
+       target_format(f),
+       target_ms(0),
+       clear_enabled(false),
+       clear_depth(1.0f),
+       clear_stencil(0)
 {
-       if(!target_format.empty())
-       {
-               FrameFormat postproc_fmt = target_format;
-               postproc_fmt.set_samples(1);
-               target[0] = new RenderTarget(width, height, postproc_fmt);
-               target[1] = new RenderTarget(width, height, postproc_fmt);
-
-               if(target_format.get_samples()>1)
-                       target_ms = new RenderTarget(width, height, target_format);
-               else
-                       target_ms = 0;
-       }
-       else
-       {
-               target_ms = 0;
-               target[0] = 0;
-               target[1] = 0;
-       }
+       if(target_format.empty())
+               throw invalid_argument("Sequence::Sequence");
+
+       FrameFormat postproc_fmt = target_format;
+       postproc_fmt.set_samples(1);
+       target[0] = new RenderTarget(width, height, postproc_fmt);
+       target[1] = new RenderTarget(width, height, postproc_fmt);
+
+       if(target_format.get_samples()>1)
+               target_ms = new RenderTarget(width, height, target_format);
 }
 
 Sequence::~Sequence()
@@ -48,6 +54,29 @@ Sequence::~Sequence()
        delete target_ms;
 }
 
+void Sequence::set_clear_enabled(bool c)
+{
+       clear_enabled = c;
+}
+
+void Sequence::set_clear_colors(const vector<Color> &c)
+{
+       clear_enabled = true;
+       clear_colors = c;
+}
+
+void Sequence::set_clear_depth(float d)
+{
+       clear_enabled = true;
+       clear_depth = d;
+}
+
+void Sequence::set_clear_stencil(int s)
+{
+       clear_enabled = true;
+       clear_stencil = s;
+}
+
 Sequence::Step &Sequence::add_step(Tag tag, Renderable &r)
 {
        steps.push_back(Step(tag, &r));
@@ -99,9 +128,31 @@ void Sequence::render(Renderer &renderer, Tag tag) const
        const Framebuffer *out_fbo = renderer.get_framebuffer();
 
        if(target[0])
-       {
                renderer.set_framebuffer(&(target_ms ? target_ms : target[0])->get_framebuffer());
-               renderer.clear();
+
+       if(clear_enabled)
+       {
+               const Framebuffer *target_fbo = renderer.get_framebuffer();
+               if(!target_fbo)
+                       throw invalid_operation("Sequence::render");
+
+               const FrameFormat &format = target_fbo->get_format();
+               ClearValue clear_values[7];
+               unsigned i = 0;
+               Color default_color = (clear_colors.empty() ? Color(0.0f, 0.0f, 0.0f, 0.0f) : clear_colors.front());
+               ClearValue *cv = clear_values;
+               for(FrameAttachment a: format)
+               {
+                       if(get_attach_point(a)==get_attach_point(DEPTH_ATTACHMENT))
+                               cv->depth_stencil.depth = clear_depth;
+                       else if(get_attach_point(a)==get_attach_point(STENCIL_ATTACHMENT))
+                               cv->depth_stencil.stencil = clear_stencil;
+                       else
+                               cv->color = (i<clear_colors.size() ? clear_colors[i++] : default_color);
+                       ++cv;
+               }
+
+               renderer.clear(clear_values);
        }
 
        for(const Step &s: steps)