Use unsigned chars for color mask;

src/graphics/graphics.c

@@ -103,15 +103,15 @@ void lovrGraphicsSetBackgroundColor(float r, float g, float b, float a) {
   glClearColor(r / 255, g / 255, b / 255, a / 255);
 }
 
-void lovrGraphicsGetColorMask(char* r, char* g, char* b, char* a) {
-  char mask = state.colorMask;
+void lovrGraphicsGetColorMask(unsigned char* r, unsigned char* g, unsigned char* b, unsigned char* a) {
+  unsigned char mask = state.colorMask;
   *r = mask & 0x1;
   *g = mask & 0x2;
   *b = mask & 0x4;
   *a = mask & 0x8;
 }
 
-void lovrGraphicsSetColorMask(char r, char g, char b, char a) {
+void lovrGraphicsSetColorMask(unsigned char r, unsigned char g, unsigned char b, unsigned char a) {
   state.colorMask = ((r & 1) << 0) | ((g & 1) << 1) | ((b & 1) << 2) | ((a & 1) << 3);
   glColorMask(r, g, b, a);
 }

src/graphics/graphics.h

@@ -14,7 +14,7 @@ typedef struct {
   mat4 lastTransform;
   mat4 projection;
   mat4 lastProjection;
-  char colorMask;
+  unsigned char colorMask;
 } GraphicsState;
 #endif
 
@@ -25,8 +25,8 @@ void lovrGraphicsPresent();
 void lovrGraphicsPrepare();
 void lovrGraphicsGetBackgroundColor(float* r, float* g, float* b, float* a);
 void lovrGraphicsSetBackgroundColor(float r, float g, float b, float a);
-void lovrGraphicsGetColorMask(char* r, char* g, char* b, char* a);
-void lovrGraphicsSetColorMask(char r, char g, char b, char a);
+void lovrGraphicsGetColorMask(unsigned char* r, unsigned char* g, unsigned char* b, unsigned char* a);
+void lovrGraphicsSetColorMask(unsigned char r, unsigned char g, unsigned char b, unsigned char a);
 Shader* lovrGraphicsGetShader();
 void lovrGraphicsSetShader(Shader* shader);
 void lovrGraphicsSetProjection(float near, float far, float fov);

src/graphics/shader.c

@@ -11,6 +11,7 @@ const char* lovrShaderVertexPrefix = ""
 
 const char* lovrShaderFragmentPrefix = ""
 "#version 150 \n"
+"uniform vec4 lovrColor; \n"
 "out vec4 color;"
 "";
 
@@ -22,7 +23,7 @@ const char* lovrDefaultVertexShader = ""
 
 const char* lovrDefaultFragmentShader = ""
 "void main() { \n"
-"  color = vec4(1.0); \n"
+"  color = lovrColor; \n"
 "}"
 "";
 

src/lovr/graphics.c

@@ -89,7 +89,7 @@ int l_lovrGraphicsSetBackgroundColor(lua_State* L) {
 }
 
 int l_lovrGraphicsGetColorMask(lua_State* L) {
-  char r, g, b, a;
+  unsigned char r, g, b, a;
   lovrGraphicsGetColorMask(&r, &g, &b, &a);
   lua_pushboolean(L, r);
   lua_pushboolean(L, g);
@@ -104,10 +104,10 @@ int l_lovrGraphicsSetColorMask(lua_State* L) {
     return 0;
   }
 
-  char r = lua_toboolean(L, 1);
-  char g = lua_toboolean(L, 2);
-  char b = lua_toboolean(L, 3);
-  char a = lua_toboolean(L, 4);
+  unsigned char r = lua_toboolean(L, 1);
+  unsigned char g = lua_toboolean(L, 2);
+  unsigned char b = lua_toboolean(L, 3);
+  unsigned char a = lua_toboolean(L, 4);
   lovrGraphicsSetColorMask(r, g, b, a);
 
   return 0;