allow alpha in plain color shader

[blobs.git] / src / graphics / shader.cpp

diff --git a/src/graphics/shader.cpp b/src/graphics/shader.cpp
index b14da4d1011358922fcf211fbb1d26ca2fb93bae..0f372d014915478dda1c2c94a6a0cb4d58193b42 100644 (file)
--- a/src/graphics/shader.cpp
+++ b/src/graphics/shader.cpp
@@ -648,9 +648,9 @@ PlainColor::PlainColor()
                GL_FRAGMENT_SHADER,
                "#version 330 core\n"
 
-               "uniform vec3 fg_color;\n"
+               "uniform vec4 fg_color;\n"
 
-               "out vec3 color;\n"
+               "out vec4 color;\n"
 
                "void main() {\n"
                        "color = fg_color;\n"
@@ -701,7 +701,8 @@ void PlainColor::Activate() noexcept {
        glEnable(GL_DEPTH_TEST);
        glDepthFunc(GL_LESS);
        glEnable(GL_CULL_FACE);
-       glDisable(GL_BLEND);
+       glEnable(GL_BLEND);
+       glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 }
 
 void PlainColor::SetM(const glm::mat4 &mm) noexcept {
@@ -733,7 +734,7 @@ void PlainColor::SetMVP(const glm::mat4 &mm, const glm::mat4 &vv, const glm::mat
        prog.Uniform(mvp_handle, mvp);
 }
 
-void PlainColor::SetColor(const glm::vec3 &color) noexcept {
+void PlainColor::SetColor(const glm::vec4 &color) noexcept {
        prog.Uniform(fg_color_handle, color);
 }