reimplemented opacity without blending modes

ui/renderfunctions.cpp

@@ -24,8 +24,6 @@
 #include "panels/timeline.h"
 #include "panels/viewer.h"
 
-bool disable_blending = false;
-
 extern "C" {
 	#include <libavformat/avformat.h>
 }
@@ -95,7 +93,7 @@ void process_effect(Clip* c,
 		if (e->enable_coords) {
 			e->process_coords(timecode, coords, data);
 		}
-		bool can_process_shaders = (e->enable_shader && shaders_are_enabled);
+		bool can_process_shaders = (e->enable_shader && runtime_config.shaders_are_enabled);
 		if (can_process_shaders || e->enable_superimpose) {
 			e->startEffect();
 			if (can_process_shaders && e->is_glsl_linked()) {
@@ -489,7 +487,7 @@ GLuint compose_sequence(ComposeSequenceParams &params) {
 
 
 						// copy front buffer to back buffer (only if we're using blending modes - which we usually will be)
-						if (!disable_blending) {
+						if (!runtime_config.disable_blending) {
 							if (params.nests.size() > 0) {
 								draw_clip(params.ctx, params.nests.last()->fbo[2]->handle(), params.nests.last()->fbo[0]->texture(), true);
 							} else {
@@ -506,13 +504,17 @@ GLuint compose_sequence(ComposeSequenceParams &params) {
 						// bind front buffer as draw buffer
 						params.ctx->functions()->glBindFramebuffer(GL_DRAW_FRAMEBUFFER, final_fbo);
 
-						if (disable_blending) {
+						if (runtime_config.disable_blending) {
 							// some GPUs don't like the blending shader, so we provide a pure GL fallback here
 
 							params.ctx->functions()->glBindTexture(GL_TEXTURE_2D, backend_tex_1);
 
+							glColor4f(coords.opacity, coords.opacity, coords.opacity, coords.opacity);
+
 							full_blit();
 
+//							glColor4f(1.0, 1.0, 1.0, 1.0);
+
 							params.ctx->functions()->glBindTexture(GL_TEXTURE_2D, 0);
 						} else {
 							// load background texture into texture unit 0