Draw red example triangle

lib/CMakeLists.txt

@@ -9,9 +9,26 @@ pkg_check_modules(EPOXY REQUIRED epoxy)
 add_compile_options(-Wall -Wextra -Wold-style-declaration -Wuninitialized -Wmaybe-uninitialized -Wunused-parameter)
 aux_source_directory("src" SRC_DIR)
 
+IF(CMAKE_BUILD_TYPE STREQUAL "Debug")
+        message("${Yellow}Debug mode for shader locations used!${ColorReset}")
+	add_definitions(-DSHADER_DIRECTORY=\"${CMAKE_CURRENT_BINARY_DIR}/shaders\")
+	message("${BoldMagenta}${CMAKE_CURRENT_BINARY_DIR}/shaders used as shader directory${ColorReset}")
+else(CMAKE_BUILD_TYPE STREQUAL "Debug")
+	message("Global shader directory used. Make sure files in /usr/share/gtk-graph-view/shaders are available")
+	add_definitions(-DSHADER_DIRECTORY=\"/usr/share/gtk-graph-view/shaders\")
+ENDIF(CMAKE_BUILD_TYPE STREQUAL "Debug")
+
+
 add_library(${PROJECT_NAME} SHARED ${SRC_DIR})
 target_include_directories(${PROJECT_NAME} PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/include)
 target_include_directories(${PROJECT_NAME} PRIVATE ${EPOXY_INCLUDE_DIRS})
 target_link_libraries(${PROJECT_NAME} PUBLIC ${GLIB_LDFLAGS} ${GTK3_LDFLAGS} ${EPOXY_LDFLAGS} shimatta-opengl)
 target_link_directories(${PROJECT_NAME} PUBLIC ${GLIB_LINK_DIRS} ${GTK3_LINK_DIRS} ${EPOXY_LINK_DIRS})
 target_include_directories(${PROJECT_NAME} PUBLIC ${GLIB_INCLUDE_DIRS} ${GTK3_INCLUDE_DIRS})
+
+configure_file("${CMAKE_CURRENT_SOURCE_DIR}/shaders/passthrough3d.vertex.glsl"
+	"${CMAKE_CURRENT_BINARY_DIR}/shaders/passthrough3d.vertex.glsl" COPYONLY)
+configure_file("${CMAKE_CURRENT_SOURCE_DIR}/shaders/monochrome.fragment.glsl"
+	"${CMAKE_CURRENT_BINARY_DIR}/shaders/monochrome.fragment.glsl" COPYONLY)
+
+

lib/shaders/monochrome.fragment.glsl

@@ -0,0 +1,10 @@
+#version 330 core
+
+out vec4 fragmentColor;
+
+uniform vec3 color;
+
+void main()
+{
+	fragmentColor = vec4(color.r, color.g, color.b, 1.0);
+}

lib/shaders/passthrough2d.vertex.glsl

@@ -0,0 +1,8 @@
+#version 330 core
+
+layout (location = 0) in vec2 inputVertex;
+
+void main()
+{
+	gl_Position = vec4(inputVertex.x, inputVertex.y, 0.0, 1.0);
+}

lib/shaders/passthrough3d.vertex.glsl

@@ -0,0 +1,8 @@
+#version 330 core
+
+layout (location = 0) in vec3 inputVertex;
+
+void main()
+{
+	gl_Position = vec4(inputVertex.x, inputVertex.y, inputVertex.z, 1.0);
+}

lib/src/gtk-graph-view.c

@@ -17,6 +17,11 @@
 #include <gtk-graph-view.h>
 #include <epoxy/gl.h>
 #include <shimatta-opengl-program.h>
+#include <shimatta-opengl-colored-triangle.h>
+
+#ifndef SHADER_DIRECTORY
+#define SHADER_DIRECTORY "/usr/share/gtk-graph-view/shaders"
+#endif
 
 struct _GtkGraphView {
 	GtkBox super;
@@ -29,6 +34,9 @@ typedef struct {
 	 */
 	GtkWidget *gl_area;
 	GdkRGBA background_color;
+	ShimattaOpenglProgram *passthrough_prog;
+	ShimattaOpenglGraphics *test;
+
 } GtkGraphViewPrivate;
 
 G_DEFINE_TYPE_WITH_PRIVATE(GtkGraphView, gtk_graph_view, GTK_TYPE_BOX)
@@ -59,6 +67,9 @@ static gboolean gl_render(GtkGLArea *gl_area, GdkGLContext *context, GtkGraphVie
 
 	gl_area_set_clear_color(gl_area, &priv->background_color);
 	glClear(GL_COLOR_BUFFER_BIT);
+
+	shimatta_opengl_graphics_draw(priv->test);
+
 	glFlush();
 
 	return TRUE;
@@ -91,6 +102,16 @@ static void gtk_graph_view_set_property(GObject *obj, guint property_id, const G
 	}
 }
 
+void gtk_graph_view_dispose(GObject *obj)
+{
+	GtkGraphView *graph_view = GTK_GRAPH_VIEW(obj);
+	GtkGraphViewPrivate *priv = gtk_graph_view_get_instance_private(graph_view);
+
+	if (priv->gl_area)
+		gtk_gl_area_make_current(GTK_GL_AREA(priv->gl_area));
+	g_clear_object(&priv->passthrough_prog);
+}
+
 static GParamSpec *gtk_graph_view_properties[N_PROPERTIES] = {NULL};
 
 /**
@@ -104,6 +125,7 @@ static void gtk_graph_view_class_init(GtkGraphViewClass *klass)
 	oclass = G_OBJECT_CLASS(klass);
 	oclass->set_property = gtk_graph_view_set_property;
 	oclass->get_property = gtk_graph_view_get_property;
+	oclass->dispose = gtk_graph_view_dispose;
 
 	gtk_graph_view_properties[PROP_BG_COLOR] =
 			g_param_spec_boxed("background-color", "background color", "Background color of Graph View",
@@ -112,11 +134,38 @@ static void gtk_graph_view_class_init(GtkGraphViewClass *klass)
 	g_object_class_install_properties(oclass, N_PROPERTIES, gtk_graph_view_properties);
 }
 
-static void gl_area_realize(GtkGLArea *area, gpointer data)
+static void gl_area_realize(GtkGLArea *area, GtkGraphView *graph_view)
 {
-	(void)data;
+	GtkGraphViewPrivate *priv;
-	gtk_gl_area_make_current(area);
+	char error_text[512];
+	int status;
+	const vec3 color = {1.0f, 0.0f, 0.0f};
+	const vec3 vertecies[3] = {
+		{-0.5f, 0.0f, 0.0f},
+		{0.5f, 0.0f, 0.0f},
+		{0.0, 0.5f, 0.0f},
+	};
 
+	gtk_gl_area_make_current(area);
+	priv =	gtk_graph_view_get_instance_private(graph_view);
+
+	priv->passthrough_prog = shimatta_opengl_program_new_from_file(SHADER_DIRECTORY"/passthrough3d.vertex.glsl",
+								       NULL,
+								       SHADER_DIRECTORY"/monochrome.fragment.glsl");
+	status = shimatta_opengl_program_compile(priv->passthrough_prog, error_text, sizeof(error_text));
+	if (status) {
+		g_warning("Error compiling shader: %s", error_text);
+	}
+
+	priv->test = shimatta_opengl_colored_triangle_new(priv->passthrough_prog, color, vertecies);
+	shimatta_opengl_graphics_realize(priv->test);
+}
+
+static void gl_area_resize(GtkGLArea *area, GtkGraphView *graph_view)
+{
+	(void)graph_view;
+
+	gtk_gl_area_queue_render(area);
 }
 
 /**
@@ -133,6 +182,7 @@ static void gtk_graph_view_init(GtkGraphView *obj)
 	priv->gl_area = gtk_gl_area_new();
 	g_signal_connect(priv->gl_area, "render", G_CALLBACK(gl_render), obj);
 	g_signal_connect(priv->gl_area, "realize", G_CALLBACK(gl_area_realize), obj);
+	g_signal_connect(priv->gl_area, "resize", G_CALLBACK(gl_area_resize), obj);
 	gtk_container_add(GTK_CONTAINER(obj), priv->gl_area);
 	gtk_box_set_child_packing(GTK_BOX(obj), priv->gl_area, TRUE, TRUE, 0, GTK_PACK_START);
 	gtk_widget_show(priv->gl_area);

shimatta-opengl

@@ -1 +1 @@
-Subproject commit 97d11cf2b000cadb5e5e2434296e1e3d4d0fe7d3
+Subproject commit 93fb12eb249f7b71f032fb2dc9b7d953b275b242