Add zoom to texture and a gray border around square

.gitmodules

@@ -0,0 +1,4 @@
+[submodule "cglm/cglm"]
+	path = cglm/cglm
+	url = https://github.com/recp/cglm
+	branch = master

CMakeLists.txt

@@ -10,10 +10,11 @@ pkg_check_modules(GTK3 REQUIRED gtk+-3.0)
 pkg_check_modules(CAIRO REQUIRED cairo)
 
 find_package(OpenCL REQUIRED)
-find_package(OpenGL REQUIRED)
-find_package(GLUT REQUIRED)
+
+
 
 add_subdirectory(glade)
+add_subdirectory(cglm)
 
 include_directories(${GLIB_INCLUDE_DIRS} ${GTK3_INCLUDE_DIRS} ${CAIRO_INCLUDE_DIRS} ${OPENCL_INCLUDE_DIRS})
 link_directories(${GLIB_LINK_DIRS} ${GTK3_LINK_DIRS} ${CAIRO_LINK_DIRS})
@@ -25,13 +26,12 @@ aux_source_directory("src" SOURCES)
 add_compile_options(-Wall)
 
 add_executable(${PROJECT_NAME} ${SOURCES} ${CMAKE_CURRENT_BINARY_DIR}/glade/resources.c)
-add_dependencies(${PROJECT_NAME} glib-resources)
+add_dependencies(${PROJECT_NAME} glib-resources cglm)
 SET_SOURCE_FILES_PROPERTIES(${CMAKE_CURRENT_BINARY_DIR}/glade/resources.c PROPERTIES GENERATED 1)
-target_link_libraries(${PROJECT_NAME} ${GLIB_LDFLAGS} ${GTK3_LDFLAGS} ${CAIRO_LDFLAGS} m pthread ${OPENCL_LIBRARIES} epoxy)
+target_link_libraries(${PROJECT_NAME} ${GLIB_LDFLAGS} ${GTK3_LDFLAGS} ${CAIRO_LDFLAGS} m pthread ${OPENCL_LIBRARIES} epoxy cglm)
 install (TARGETS ${PROJECT_NAME} DESTINATION bin)
 
 message(STATUS "OpenCL found: ${OPENCL_FOUND}")
 message(STATUS "OpenCL includes: ${OPENCL_INCLUDE_DIRS}")
 message(STATUS "OpenCL CXX includes: ${OPENCL_HAS_CPP_BINDINGS}")
 message(STATUS "OpenCL libraries: ${OPENCL_LIBRARIES}")
-message(STATUS "OpenGL libraries: ${OPENGL_gl_LIBRARIES}")

cglm/CMakeLists.txt

@@ -0,0 +1,14 @@
+project(cglm)
+cmake_minimum_required(VERSION 2.8)
+
+include_directories(${GLIB_INCLUDE_DIRS} ${GTK3_INCLUDE_DIRS} ${CAIRO_INCLUDE_DIRS} ${OPENCL_INCLUDE_DIRS})
+link_directories(${GLIB_LINK_DIRS} ${GTK3_LINK_DIRS} ${CAIRO_LINK_DIRS})
+add_definitions(${GLIB2_CFLAGS_OTHER})
+
+aux_source_directory("cglm/src" SOURCES)
+add_library(${PROJECT_NAME} STATIC ${SOURCES})
+add_compile_options(-Wall -std=gnu99 -O3 -Wstrict-aliasing=2 -fstrict-aliasing -pedantic)
+target_include_directories(${PROJECT_NAME} PUBLIC "cglm/include")
+
+target_link_libraries(${PROJECT_NAME} m)
+

src/main.c

@@ -6,31 +6,34 @@
 #include <CL/cl.h>
 #include <epoxy/gl.h>
 #include <epoxy/glx.h>
-
+#include <time.h>
+#include <cglm/call.h>
 
 static const char * const vertex_shader = "#version 330 core\n				\
 		layout (location = 0) in vec3 aPos;\n			\
 		layout (location = 1) in vec2 aTexCoord;\n\
-		out vec2 texCoord;\n							\
+		out vec2 texCoord;\n\
+		out vec3 vertPos;\n							\
+		uniform float zoom;\n\
 		void main()\n						\
 		{\n							\
 		    gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);\n	\
-		    texCoord = aTexCoord;\n\
+		    texCoord = aTexCoord / zoom;\n\
+		    vertPos = aPos;\n\
 		}\n";
 
 static const char * const orange_framgment_shader = "  \
 		#version 330 core\n		\
 		out vec4 FragColor;\n		\
-		in vec4 vertexColor;\n		\
+		in vec3 vertPos;\n		\
 		in vec2 texCoord;\n		\
 		uniform sampler2D ourTexture;\n \
 		\n				\
 		void main()\n			\
 		{\n				\
-		    FragColor = texture(ourTexture, texCoord);\n \
+		    FragColor = texture(ourTexture, texCoord);\n\
 		}";
 
-
 struct canvas_buffer {
 		unsigned char *mandelbrot_buffer;
 		unsigned int iterations;
@@ -48,13 +51,13 @@ static gboolean on_main_window_close(GtkWidget *window, gpointer data)
 	return FALSE;
 }
 
-#define check_error(error) \
-	do { \
-	if (error != CL_SUCCESS) { \
-		printf("OpenCL call failed with error %d. %s:%d\n", (int)error, __func__, __LINE__); \
-		exit(error); \
-	} } while(0)
-
+void check_error(cl_int error)
+{
+	if (error != CL_SUCCESS) {
+		printf("OpenCL call failed with error %d\n", (int)error);
+		exit(error);
+	}
+}
 
 void load_kernel_from_file(char *file, char **src)
 {
@@ -103,7 +106,7 @@ static int calculate_mandelbrot(struct canvas_buffer *buff)
 	char *source_code = NULL;
 	char temp_buff[100];
 	size_t data_size;
-	size_t work_size = 10;
+	size_t work_size = 64;
 
 
 	data_size = buff->width*buff->height;
@@ -189,8 +192,6 @@ static int calculate_mandelbrot(struct canvas_buffer *buff)
 
 	clEnqueueReadBuffer(queue, dat_buff, CL_TRUE, 0, data_size*3, buff->mandelbrot_buffer, 0, NULL, NULL);
 
-	printf("Calculation finished!\n");
-
 	ret = clFlush(queue);
 	ret = clFinish(queue);
 	ret = clReleaseKernel(kernel);
@@ -207,10 +208,10 @@ static int calculate_mandelbrot(struct canvas_buffer *buff)
 
 float vertices[] = {
     // Vertex			Texture
-    -1.0f, -1.0f, 0.0f,		0.0f, 0.0f,		// bottom left
-     -1.0f, 1.0f, 0.0f,		0.0f, 1.0f,		// top left
-     1.0f,  -1.0f, 0.0f,	1.0f, 0.0f,		// bottom right
-     1.0f, 1.0f, 0.0f,		1.0f, 1.0f,		// top right
+    -0.95f, -0.95f, 0.0f,		0.0f, 0.0f,		// bottom left
+     -0.95f, 0.95f, 0.0f,		0.0f, 1.0f,		// top left
+     0.95f,  -0.95f, 0.0f,		1.0f, 0.0f,		// bottom right
+     0.95f,  0.95f, 0.0f,		1.0f, 1.0f,		// top right
 };
 
 unsigned int indices[] = {
@@ -226,13 +227,17 @@ static unsigned int texture_id;
 
 gboolean render(GtkGLArea *gl_area, GdkGLContext *context, gpointer user_data)
 {
+	int zoom_loc;
+	static float zoom = 1.0f;
 
 	gtk_gl_area_make_current(gl_area);
 
 	glClear(GL_COLOR_BUFFER_BIT);
 
 	glUseProgram(shader_program_id);
-	//glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+	zoom_loc = glGetUniformLocation(shader_program_id, "zoom");
+	glUniform1f(zoom_loc, zoom);
+	glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
 	glBindTexture(GL_TEXTURE_2D, texture_id);
 	glBindVertexArray(vertex_array_object);
 	//glDrawArrays(GL_TRIANGLES, 0, 3);
@@ -254,7 +259,7 @@ void realize(GtkGLArea *gl_area, gpointer user_data)
 	char info_log[512];
 
 	gtk_gl_area_make_current(gl_area);
-	glClearColor(0, 0, 0, 1);
+	glClearColor(0.2, 0.2, 0.2, 1);
 
 	glGenVertexArrays(1, &vertex_array_object);
 	glBindVertexArray(vertex_array_object);
@@ -335,8 +340,8 @@ int main(int argc, char **argv)
 	GtkGLArea *gl_area;
 	GtkWindow *window;
 	GtkBuilder *builder;
-	GtkWidget *temp;
 	static struct canvas_buffer mandelbrot_buff;
+	clock_t start, end;
 
 	gtk_init(&argc, &argv);
 
@@ -346,24 +351,20 @@ int main(int argc, char **argv)
 	g_signal_connect(window, "delete-event", G_CALLBACK(on_main_window_close), NULL);
 
 
-
-	mandelbrot_buff.x_span = 0.075;//2.8;
-	mandelbrot_buff.y_span = 0.075;//2.25;
+	mandelbrot_buff.x_span = 0.1;//2.8;
+	mandelbrot_buff.y_span = 0.1;//2.25;
 	mandelbrot_buff.center_x = -0.6;
-	mandelbrot_buff.center_y = 0.45;
-	mandelbrot_buff.width = 3000;
-	mandelbrot_buff.height = 3000;
-	mandelbrot_buff.iterations = 200;
+	mandelbrot_buff.center_y = 0.44;
+	mandelbrot_buff.width = 4000;
+	mandelbrot_buff.height = 4000;
+	mandelbrot_buff.iterations = 1000;
 	mandelbrot_buff.mandelbrot_buffer = NULL;
-	//calculate_mandelbrot(&mandelbrot_buff);
-
-	gtk_gl_area_make_current(glarea);
-
-
-
-	GError *error = NULL;
-	g_signal_connect(glarea, "render", G_CALLBACK(render), NULL);
 
+	printf("Compile and run Mandelbrot on OpenCL HW\n");
+	start = clock();
+	calculate_mandelbrot(&mandelbrot_buff);
+	end = clock();
+	printf("Calculation finished. Time needed: %lf ms\n", ((double)(end - start)) / CLOCKS_PER_SEC * 1000.0);
 
 
 	gl_area = GTK_GL_AREA(gtk_gl_area_new());
@@ -380,7 +381,7 @@ int main(int argc, char **argv)
 
 	gtk_gl_area_make_current(gl_area);
 
-
+	printf("Gui will be displayed\n");
 	gtk_main();
 
 	return 0;