Test
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173d18acec
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@ -10,8 +10,8 @@ pkg_check_modules(GTK3 REQUIRED gtk+-3.0)
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pkg_check_modules(CAIRO REQUIRED cairo)
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find_package(OpenCL REQUIRED)
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find_package(OpenGL REQUIRED)
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find_package(GLUT REQUIRED)
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add_subdirectory(glade)
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@ -27,10 +27,11 @@ add_compile_options(-Wall)
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add_executable(${PROJECT_NAME} ${SOURCES} ${CMAKE_CURRENT_BINARY_DIR}/glade/resources.c)
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add_dependencies(${PROJECT_NAME} glib-resources)
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SET_SOURCE_FILES_PROPERTIES(${CMAKE_CURRENT_BINARY_DIR}/glade/resources.c PROPERTIES GENERATED 1)
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target_link_libraries(${PROJECT_NAME} ${GLIB_LDFLAGS} ${GTK3_LDFLAGS} ${CAIRO_LDFLAGS} m pthread ${OPENCL_LIBRARIES})
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target_link_libraries(${PROJECT_NAME} ${GLIB_LDFLAGS} ${GTK3_LDFLAGS} ${CAIRO_LDFLAGS} m pthread ${OPENCL_LIBRARIES} ${GLUT_LIBRARIES} ${OPENGL_gl_LIBRARIES} ${GLUT_LIBRARIES} epoxy)
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install (TARGETS ${PROJECT_NAME} DESTINATION bin)
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message(STATUS "OpenCL found: ${OPENCL_FOUND}")
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message(STATUS "OpenCL includes: ${OPENCL_INCLUDE_DIRS}")
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message(STATUS "OpenCL CXX includes: ${OPENCL_HAS_CPP_BINDINGS}")
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message(STATUS "OpenCL libraries: ${OPENCL_LIBRARIES}")
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message(STATUS "OpenGL libraries: ${OPENGL_gl_LIBRARIES}")
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@ -11,8 +11,9 @@
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<placeholder/>
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</child>
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<child>
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<object class="GtkDrawingArea" id="drawing-area">
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<object class="GtkGLArea" id="glarea">
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<property name="visible">True</property>
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<property name="app_paintable">True</property>
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<property name="can_focus">False</property>
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</object>
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</child>
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138
src/main.c
138
src/main.c
@ -4,6 +4,7 @@
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#include <errno.h>
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#include <stdlib.h>
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#include <CL/cl.h>
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#include <epoxy/gl.h>
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struct canvas_buffer {
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unsigned int *mandelbrot_buffer;
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@ -22,13 +23,13 @@ static gboolean on_main_window_close(GtkWidget *window, gpointer data)
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return FALSE;
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}
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void check_error(cl_int error)
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{
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if (error != CL_SUCCESS) {
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printf("OpenCL call failed with error %d\n", (int)error);
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exit(error);
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}
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}
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#define check_error(error) \
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do { \
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if (error != CL_SUCCESS) { \
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printf("OpenCL call failed with error %d. %s:%d\n", (int)error, __func__, __LINE__); \
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exit(error); \
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} } while(0)
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void load_kernel_from_file(char *file, char **src)
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{
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@ -58,51 +59,6 @@ cl_program create_program(char *src, cl_context context)
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return program;
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}
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unsigned int *data_array = NULL;
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static gboolean drawing_callback(GtkWidget *widget, cairo_t *cr, gpointer data)
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{
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struct canvas_buffer *buff = (struct canvas_buffer *)data;
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int width;
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int height;
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GtkStyleContext *style_context;
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int x, y;
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double color_scale;
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style_context = gtk_widget_get_style_context(widget);
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width = gtk_widget_get_allocated_width(widget);
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height = gtk_widget_get_allocated_height(widget);
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cairo_save(cr);
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/* Drawing code start */
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cairo_scale(cr, 1, -1);
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cairo_translate(cr, (double)width/2.0, -(double)height/2.0);
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for (x = 0; x < buff->width; x++) {
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for (y = 0; y < buff->height; y++) {
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cairo_rectangle(cr,
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((double)x - (double)(buff->width - 1) / 2),
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((double)y - (double)(buff->height - 1) / 2),
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1,
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1);
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if (data_array[y * buff->width + x] == buff->iterations) {
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cairo_set_source_rgb (cr, 0, 0, 0);
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} else {
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color_scale = (double)data_array[y * buff->width + x] / buff->iterations;
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cairo_set_source_rgb (cr, (sqrt(1-color_scale)), (color_scale*color_scale), color_scale);
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}
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cairo_fill(cr);
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}
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}
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/* Drawing code end */
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cairo_restore(cr);
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return FALSE;
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}
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static int calculate_mandelbrot(struct canvas_buffer *buff)
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{
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@ -123,10 +79,14 @@ static int calculate_mandelbrot(struct canvas_buffer *buff)
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char temp_buff[100];
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size_t data_size;
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size_t work_size = 64;
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unsigned int *data_array;
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data_size = buff->width*buff->height;
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data_array = (unsigned int *)malloc(sizeof(data_array[0])*data_size);
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if (!buff->mandelbrot_buffer)
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buff->mandelbrot_buffer = (unsigned int *)calloc(data_size, sizeof(buff->mandelbrot_buffer[0]));
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data_array = buff->mandelbrot_buffer;
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if (!data_array)
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return -ENOMEM;
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@ -205,6 +165,8 @@ static int calculate_mandelbrot(struct canvas_buffer *buff)
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clEnqueueReadBuffer(queue, dat_buff, CL_TRUE, 0, data_size*sizeof(data_array[0]), data_array, 0, NULL, NULL);
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printf("Calculation finished!\n");
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ret = clFlush(queue);
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ret = clFinish(queue);
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ret = clReleaseKernel(kernel);
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@ -219,39 +181,83 @@ static int calculate_mandelbrot(struct canvas_buffer *buff)
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}
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// This will identify our vertex buffer
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GLuint vertexbuffer;
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// An array of 3 vectors which represents 3 vertices
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static const GLfloat g_vertex_buffer_data[] = {
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-10.0f, -10.0f, 0.0f,
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10.0f, -10.0f, 0.0f,
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0.0f, 10.0f, 0.0f,
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};
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static gboolean render(GtkGLArea *area, GdkGLContext *context)
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{
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gtk_gl_area_make_current(area);
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glClearColor (1, 0, 1, 0.5);
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//glClear (GL_COLOR_BUFFER_BIT);
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// Generate 1 buffer, put the resulting identifier in vertexbuffer
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glGenBuffers(1, &vertexbuffer);
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// The following commands will talk about our 'vertexbuffer' buffer
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glBindBuffer(GL_ARRAY_BUFFER, vertexbuffer);
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// Give our vertices to OpenGL.
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glBufferData(GL_ARRAY_BUFFER, sizeof(g_vertex_buffer_data), g_vertex_buffer_data, GL_STATIC_DRAW);
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// 1st attribute buffer : vertices
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glEnableVertexAttribArray(0);
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glBindBuffer(GL_ARRAY_BUFFER, vertexbuffer);
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glVertexAttribPointer(
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0, // attribute 0. No particular reason for 0, but must match the layout in the shader.
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3, // size
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GL_FLOAT, // type
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GL_FALSE, // normalized?
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0, // stride
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(void*)0 // array buffer offset
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);
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// Draw the triangle !
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glDrawArrays(GL_TRIANGLES, 0, 3); // Starting from vertex 0; 3 vertices total -> 1 triangle
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glDisableVertexAttribArray(0);
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return TRUE;
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}
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int main(int argc, char **argv)
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{
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GtkDrawingArea *drawing_area;
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GtkWindow *window;
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GtkBuilder *builder;
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GtkGLArea *glarea;
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static struct canvas_buffer mandelbrot_buff;
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gtk_init(&argc, &argv);
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builder = gtk_builder_new_from_resource("/main.glade");
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drawing_area = GTK_DRAWING_AREA(gtk_builder_get_object(builder, "drawing-area"));
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window = GTK_WINDOW(gtk_builder_get_object(builder, "main-window"));
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g_signal_connect(window, "delete-event", G_CALLBACK(on_main_window_close), NULL);
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g_signal_connect(G_OBJECT(drawing_area),
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"draw", G_CALLBACK(drawing_callback), (gpointer)&mandelbrot_buff);
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glarea = GTK_GL_AREA(gtk_builder_get_object(builder, "glarea"));
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g_object_unref(builder);
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mandelbrot_buff.x_span = 1;//2.8;
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mandelbrot_buff.y_span = 0.5;//2.25;
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mandelbrot_buff.center_x = -0.6;
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mandelbrot_buff.center_y = 0.6;
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mandelbrot_buff.width = 4000;
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mandelbrot_buff.height = 2000;
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mandelbrot_buff.width = 1920*3;
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mandelbrot_buff.height = 1080*3;
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mandelbrot_buff.iterations = 70;
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mandelbrot_buff.mandelbrot_buffer = NULL;
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calculate_mandelbrot(&mandelbrot_buff);
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//calculate_mandelbrot(&mandelbrot_buff);
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gtk_gl_area_make_current(glarea);
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GError *error = NULL;
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g_signal_connect(glarea, "render", G_CALLBACK(render), NULL);
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gtk_main();
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