Rename the OutputAlphaFormat enums; they had gotten inconsistent after the last alpha...

[movit] / effect_chain.cpp

diff --git a/effect_chain.cpp b/effect_chain.cpp
index f6266d741e63c0308ea841952a6ec23816f30406..bd039b0113e662a9279976a3d01ed43e2a406102 100644 (file)
--- a/effect_chain.cpp
+++ b/effect_chain.cpp
@@ -618,8 +618,8 @@ void EffectChain::inform_input_sizes(Phase *phase)
        }
        for (unsigned i = 0; i < phase->inputs.size(); ++i) {
                Node *input = phase->inputs[i];
-               input->output_width = input->phase->output_width;
-               input->output_height = input->phase->output_height;
+               input->output_width = input->phase->virtual_output_width;
+               input->output_height = input->phase->virtual_output_height;
                assert(input->output_width != 0);
                assert(input->output_height != 0);
        }
@@ -662,14 +662,54 @@ void EffectChain::find_output_size(Phase *phase)
 
        // If the last effect explicitly sets an output size, use that.
        if (output_node->effect->changes_output_size()) {
-               output_node->effect->get_output_size(&phase->output_width, &phase->output_height);
+               output_node->effect->get_output_size(&phase->output_width, &phase->output_height,
+                                                    &phase->virtual_output_width, &phase->virtual_output_height);
                return;
        }
 
+       // If all effects have the same size, use that.
        unsigned output_width = 0, output_height = 0;
+       bool all_inputs_same_size = true;
 
-       // If not, look at the input phases and textures.
-       // We select the largest one (by fit into the current aspect).
+       for (unsigned i = 0; i < phase->inputs.size(); ++i) {
+               Node *input = phase->inputs[i];
+               assert(input->phase->output_width != 0);
+               assert(input->phase->output_height != 0);
+               if (output_width == 0 && output_height == 0) {
+                       output_width = input->phase->virtual_output_width;
+                       output_height = input->phase->virtual_output_height;
+               } else if (output_width != input->phase->virtual_output_width ||
+                          output_height != input->phase->virtual_output_height) {
+                       all_inputs_same_size = false;
+               }
+       }
+       for (unsigned i = 0; i < phase->effects.size(); ++i) {
+               Effect *effect = phase->effects[i]->effect;
+               if (effect->num_inputs() != 0) {
+                       continue;
+               }
+
+               Input *input = static_cast<Input *>(effect);
+               if (output_width == 0 && output_height == 0) {
+                       output_width = input->get_width();
+                       output_height = input->get_height();
+               } else if (output_width != input->get_width() ||
+                          output_height != input->get_height()) {
+                       all_inputs_same_size = false;
+               }
+       }
+
+       if (all_inputs_same_size) {
+               assert(output_width != 0);
+               assert(output_height != 0);
+               phase->virtual_output_width = phase->output_width = output_width;
+               phase->virtual_output_height = phase->output_height = output_height;
+               return;
+       }
+
+       // If not, fit all the inputs into the current aspect, and select the largest one. 
+       output_width = 0;
+       output_height = 0;
        for (unsigned i = 0; i < phase->inputs.size(); ++i) {
                Node *input = phase->inputs[i];
                assert(input->phase->output_width != 0);
@@ -687,8 +727,8 @@ void EffectChain::find_output_size(Phase *phase)
        }
        assert(output_width != 0);
        assert(output_height != 0);
-       phase->output_width = output_width;
-       phase->output_height = output_height;
+       phase->virtual_output_width = phase->output_width = output_width;
+       phase->virtual_output_height = phase->output_height = output_height;
 }
 
 void EffectChain::sort_all_nodes_topologically()
@@ -736,10 +776,10 @@ void EffectChain::find_color_spaces_for_inputs()
                        case Effect::OUTPUT_BLANK_ALPHA:
                                node->output_alpha_type = ALPHA_BLANK;
                                break;
-                       case Effect::INPUT_AND_OUTPUT_ALPHA_PREMULTIPLIED:
+                       case Effect::INPUT_AND_OUTPUT_PREMULTIPLIED_ALPHA:
                                node->output_alpha_type = ALPHA_PREMULTIPLIED;
                                break;
-                       case Effect::OUTPUT_ALPHA_POSTMULTIPLIED:
+                       case Effect::OUTPUT_POSTMULTIPLIED_ALPHA:
                                node->output_alpha_type = ALPHA_POSTMULTIPLIED;
                                break;
                        case Effect::DONT_CARE_ALPHA_TYPE:
@@ -845,7 +885,7 @@ void EffectChain::propagate_alpha()
                }
 
                // Only inputs can have unconditional alpha output (OUTPUT_BLANK_ALPHA
-               // or OUTPUT_ALPHA_POSTMULTIPLIED), and they have already been
+               // or OUTPUT_POSTMULTIPLIED_ALPHA), and they have already been
                // taken care of above. Rationale: Even if you could imagine
                // e.g. an effect that took in an image and set alpha=1.0
                // unconditionally, it wouldn't make any sense to have it as
@@ -853,7 +893,7 @@ void EffectChain::propagate_alpha()
                // got its input pre- or postmultiplied, so it wouldn't know
                // whether to divide away the old alpha or not.
                Effect::AlphaHandling alpha_handling = node->effect->alpha_handling();
-               assert(alpha_handling == Effect::INPUT_AND_OUTPUT_ALPHA_PREMULTIPLIED ||
+               assert(alpha_handling == Effect::INPUT_AND_OUTPUT_PREMULTIPLIED_ALPHA ||
                       alpha_handling == Effect::DONT_CARE_ALPHA_TYPE);
 
                // If the node has multiple inputs, check that they are all valid and
@@ -893,7 +933,7 @@ void EffectChain::propagate_alpha()
                        continue;
                }
 
-               if (alpha_handling == Effect::INPUT_AND_OUTPUT_ALPHA_PREMULTIPLIED) {
+               if (alpha_handling == Effect::INPUT_AND_OUTPUT_PREMULTIPLIED_ALPHA) {
                        // If the effect has asked for premultiplied alpha, check that it has got it.
                        if (any_postmultiplied) {
                                node->output_alpha_type = ALPHA_INVALID;
@@ -1101,14 +1141,14 @@ void EffectChain::fix_output_alpha()
                return;
        }
        if (output->output_alpha_type == ALPHA_PREMULTIPLIED &&
-           output_alpha_format == OUTPUT_ALPHA_POSTMULTIPLIED) {
+           output_alpha_format == OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED) {
                Node *conversion = add_node(new AlphaDivisionEffect());
                connect_nodes(output, conversion);
                propagate_alpha();
                propagate_gamma_and_color_space();
        }
        if (output->output_alpha_type == ALPHA_POSTMULTIPLIED &&
-           output_alpha_format == OUTPUT_ALPHA_PREMULTIPLIED) {
+           output_alpha_format == OUTPUT_ALPHA_FORMAT_PREMULTIPLIED) {
                Node *conversion = add_node(new AlphaMultiplicationEffect());
                connect_nodes(output, conversion);
                propagate_alpha();