From 1cc8f5dc5413651d12df2ada51538d46734b0f0f Mon Sep 17 00:00:00 2001
From: Bjørn Lindeijer <bjorn@lindeijer.nl>
Date: Fri, 18 Feb 2005 11:13:53 +0000
Subject: So I added this alpha attribute to images...

---
 src/resources/image.cpp | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

(limited to 'src/resources/image.cpp')

diff --git a/src/resources/image.cpp b/src/resources/image.cpp
index eca4b42f..02eb2393 100644
--- a/src/resources/image.cpp
+++ b/src/resources/image.cpp
@@ -40,6 +40,8 @@ Image::Image(GLuint image, int width, int height, int texWidth, int texHeight):
     texHeight(texHeight)
 #endif
 {
+    // Default to opaque
+    alpha = 1.0f;
 }
 
 Image::~Image()
@@ -250,6 +252,9 @@ bool Image::draw(SDL_Surface *screen, int srcX, int srcY, int dstX, int dstY,
     // Check that preconditions for blitting are met.
     if (screen == NULL || image == NULL) return false;
 
+    // Set the alpha value this image is drawn at
+    SDL_SetAlpha(image, SDL_SRCALPHA, 255 * alpha);
+
     SDL_Rect dstRect;
     SDL_Rect srcRect;
     dstRect.x = dstX; dstRect.y = dstY;
@@ -303,6 +308,9 @@ bool Image::draw(SDL_Surface *screen, int x, int y)
     // Check that preconditions for blitting are met.
     if (screen == NULL || image == NULL) return false;
 
+    // Set the alpha value this image is drawn at
+    SDL_SetAlpha(image, SDL_SRCALPHA, 255 * alpha);
+
     SDL_Rect dstRect;
     dstRect.x = x;
     dstRect.y = y;
@@ -367,6 +375,17 @@ void Image::drawPattern(SDL_Surface *screen, int x, int y, int w, int h)
     }
 }
 
+void Image::setAlpha(float alpha)
+{
+    this->alpha = alpha;
+}
+
+float Image::getAlpha()
+{
+    return alpha;
+}
+
+
 //============================================================================
 
 #ifndef USE_OPENGL
@@ -420,6 +439,9 @@ bool SubImage::draw(SDL_Surface *screen, int srcX, int srcY,
     // Check that preconditions for blitting are met.
     if (screen == NULL || image == NULL) return false;
 
+    // Set the alpha value this image is drawn at
+    SDL_SetAlpha(image, SDL_SRCALPHA, 255 * alpha);
+
     SDL_Rect dstRect;
     SDL_Rect srcRect;
     dstRect.x = dstX; dstRect.y = dstY;
@@ -473,6 +495,9 @@ bool SubImage::draw(SDL_Surface *screen, int x, int y)
     // Check that drawing preconditions are satisfied.
     if (screen == NULL || image == NULL) return false;
 
+    // Set the alpha value this image is drawn at
+    SDL_SetAlpha(image, SDL_SRCALPHA, 255 * alpha);
+
     SDL_Rect dstRect;
     dstRect.x = x;
     dstRect.y = y;
-- 
cgit v1.2.3-70-g09d2