From fdb86173bc35422315859e37ed27f9ad63fa7aec Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Wed, 3 Feb 2016 10:13:49 +0100
Subject: Add support for modifiable parameters

---
 glslview.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

(limited to 'glslview.c')

diff --git a/glslview.c b/glslview.c
index 10235c9..4061282 100644
--- a/glslview.c
+++ b/glslview.c
@@ -53,6 +53,14 @@
 static float speed = 1.0;
 static unsigned previous_ticks = 0;
 
+static GLint param_k = 0;
+static GLint param_l = 0;
+static GLint param_m = 0;
+
+static GLint param_k_loc;
+static GLint param_l_loc;
+static GLint param_m_loc;
+
 #ifdef USE_INOTIFY
 static int inotify_fd = -1;
 static int inotify_watch = -1;
@@ -141,6 +149,12 @@ static void load(void) {
 	time_loc = glGetUniformLocation(program, "time");
 	res_loc = glGetUniformLocation(program, "res");
 
+#ifndef GLSLWRITE
+	param_k_loc = glGetUniformLocation(program, "param_k");
+	param_l_loc = glGetUniformLocation(program, "param_l");
+	param_m_loc = glGetUniformLocation(program, "param_m");
+#endif
+
 	glUseProgram(program);
 
 	free(shader);
@@ -250,6 +264,10 @@ static void render(int width, int height) {
 	unsigned ticks = SDL_GetTicks();
 	current_time += speed * (ticks - previous_ticks);
 	previous_ticks = ticks;
+
+	glUniform1i(param_k_loc, param_k);
+	glUniform1i(param_l_loc, param_l);
+	glUniform1i(param_m_loc, param_m);
 #endif
 
 	glUniform1f(time_loc, current_time);
@@ -278,6 +296,10 @@ static void handle_input(const char *input) {
 			current_time = 0;
 			break;
 
+		case 'R':
+			param_k = param_l = param_m = 0;
+			break;
+
 		case '+':
 			speed *= 1.1;
 			break;
@@ -341,6 +363,33 @@ int main(int argc, char *argv[]) {
 			switch (e.type) {
 			case SDL_KEYDOWN:
 				switch (e.key.keysym.sym) {
+#ifndef GLSLWRITE
+				case SDLK_PAGEDOWN:
+					param_k++;
+					break;
+
+				case SDLK_PAGEUP:
+					param_k--;
+					break;
+
+				case SDLK_RIGHT:
+					param_l++;
+					break;
+
+				case SDLK_LEFT:
+					param_l--;
+					break;
+
+				case SDLK_DOWN:
+					param_m++;
+					break;
+
+				case SDLK_UP:
+					param_m--;
+					break;
+
+#endif
+
 				case SDLK_ESCAPE:
 					goto quit;
 				}
-- 
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