From 8a2c96eedfa91dc2f791c90f85697d3a3fe2a268 Mon Sep 17 00:00:00 2001
From: Ricardo Cruz <rick2@aeiou.pt>
Date: Fri, 24 Sep 2004 18:00:46 +0000
Subject: [PATCH] Added an alpha parameter for transformation and got rid of
 ugly alpha draw_font() parameter.

SVN-Revision: 1966
---
 lib/video/drawing_context.cpp | 21 +++++++++++++++------
 lib/video/drawing_context.h   |  7 +++++--
 2 files changed, 20 insertions(+), 8 deletions(-)

diff --git a/lib/video/drawing_context.cpp b/lib/video/drawing_context.cpp
index 80e4b8db2..c7718c5f7 100644
--- a/lib/video/drawing_context.cpp
+++ b/lib/video/drawing_context.cpp
@@ -31,6 +31,7 @@ DrawingContext::DrawingContext()
 {
 transform.draw_effect = NONE_EFFECT;
 transform.zoom = 1;
+transform.alpha = 255;
 }
 
 DrawingContext::~DrawingContext()
@@ -52,6 +53,7 @@ DrawingContext::draw_surface(const Surface* surface, const Vector& position,
   request.drawing_effect = drawing_effect;
   request.drawing_effect = transform.draw_effect | drawing_effect;
   request.zoom = transform.zoom;
+  request.alpha = transform.alpha;
 
   drawingrequests.push_back(request);
 }
@@ -68,6 +70,7 @@ DrawingContext::draw_surface_part(const Surface* surface, const Vector& source,
   request.layer = layer;
   request.pos = transform.apply(dest);
   request.drawing_effect = drawing_effect;
+  request.alpha = transform.alpha;
   
   SurfacePartRequest* surfacepartrequest = new SurfacePartRequest();
   surfacepartrequest->size = size;
@@ -81,7 +84,7 @@ DrawingContext::draw_surface_part(const Surface* surface, const Vector& source,
 void
 DrawingContext::draw_text(Font* font, const std::string& text,
     const Vector& position, int allignment, int layer,
-    Uint32 drawing_effect, int alpha)
+    Uint32 drawing_effect)
 {
   DrawingRequest request;
 
@@ -89,12 +92,12 @@ DrawingContext::draw_text(Font* font, const std::string& text,
   request.layer = layer;
   request.pos = transform.apply(position);
   request.drawing_effect = drawing_effect;
+  request.alpha = transform.alpha;
 
   TextRequest* textrequest = new TextRequest;
   textrequest->font = font;
   textrequest->text = text;
   textrequest->allignment = allignment;
-  textrequest->alpha = alpha;
   request.request_data = textrequest;
 
   drawingrequests.push_back(request);
@@ -144,7 +147,7 @@ DrawingContext::draw_surface_part(DrawingRequest& request)
   surfacepartrequest->surface->impl->draw_part(
       surfacepartrequest->source.x, surfacepartrequest->source.y,
       request.pos.x, request.pos.y,
-      surfacepartrequest->size.x, surfacepartrequest->size.y, 255,
+      surfacepartrequest->size.x, surfacepartrequest->size.y, request.alpha,
       request.drawing_effect);
 
   delete surfacepartrequest;
@@ -201,7 +204,7 @@ DrawingContext::draw_text(DrawingRequest& request)
 {
   TextRequest* textrequest = (TextRequest*) request.request_data;
 
-  textrequest->font->draw(textrequest->text, request.pos, textrequest->allignment, request.drawing_effect, textrequest->alpha);
+  textrequest->font->draw(textrequest->text, request.pos, textrequest->allignment, request.drawing_effect, request.alpha);
 
   delete textrequest;
 }
@@ -295,9 +298,9 @@ DrawingContext::do_drawing()
         if(i->zoom != 1.0)
           surface->impl->draw_stretched(i->pos.x * i->zoom, i->pos.y * i->zoom,
                          (int)(surface->w * i->zoom), (int)(surface->h * i->zoom),
-                         255, i->drawing_effect);
+                         i->alpha, i->drawing_effect);
         else
-          surface->impl->draw(i->pos.x, i->pos.y, 255, i->drawing_effect);
+          surface->impl->draw(i->pos.x, i->pos.y, i->alpha, i->drawing_effect);
         break;
       }
       case SURFACE_PART:
@@ -350,3 +353,9 @@ DrawingContext::set_zooming(float zoom)
 {
   transform.zoom = zoom;
 }
+
+void
+DrawingContext::set_alpha(int alpha)
+{
+  transform.alpha = alpha;
+}
diff --git a/lib/video/drawing_context.h b/lib/video/drawing_context.h
index a927b6727..2d7b1ad58 100644
--- a/lib/video/drawing_context.h
+++ b/lib/video/drawing_context.h
@@ -68,7 +68,7 @@ namespace SuperTux
       /// Draws a text.
       void draw_text(Font* font, const std::string& text, const Vector& position,
                      int allignment, int layer,
-                     Uint32 drawing_effect = NONE_EFFECT, int alpha = 255);
+                     Uint32 drawing_effect = NONE_EFFECT);
       /// Draws a color gradient onto the whole screen */
       void draw_gradient(Color from, Color to, int layer);
       /// Fills a rectangle.
@@ -93,6 +93,8 @@ namespace SuperTux
       void set_drawing_effect(int effect);
       /// apply that zoom in the next draws */
       void set_zooming(float zoom);
+      /// apply that alpha in the next draws */
+      void set_alpha(int alpha);
 
     private:
       class Transform
@@ -107,6 +109,7 @@ namespace SuperTux
 
           Uint32 draw_effect;
           float zoom;
+          int alpha;
         };
 
       /// the transform stack
@@ -130,7 +133,6 @@ namespace SuperTux
           Font* font;
           std::string text;
           int allignment;
-          int alpha;
         };
 
       struct GradientRequest
@@ -150,6 +152,7 @@ namespace SuperTux
           int layer;
           Uint32 drawing_effect;
           float zoom;
+          int alpha;
 
           RequestType type;
           Vector pos;
-- 
2.11.0