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[GTK3] Implement OpenGL renderer prototype

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This commit is contained in:
Maximilian Mader 2019-09-22 03:07:14 +02:00
parent 1b2317e3c6
commit 2ea8858dfc
Signed by: Max
GPG Key ID: F71D56A3151C4FB3
6 changed files with 417 additions and 11 deletions
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7
Makefile
View File

@ -83,8 +83,11 @@ endif
CFLAGS += -Werror -Wall -Wno-unused-result -Wno-strict-aliasing -Wno-unknown-warning -Wno-unknown-warning-option -Wno-multichar -Wno-int-in-bool-context -std=gnu11 -D_GNU_SOURCE -DVERSION="$(VERSION)" -I. -D_USE_MATH_DEFINES
SDL_LDFLAGS := -lSDL2 -lGL
GTK3_CFLAGS := `pkg-config --cflags gtk+-3.0` -DGTK_DISABLE_DEPRECATED=1 -DG_DISABLE_DEPRECATED=1
GTK3_LDFLAGS := `pkg-config --libs gtk+-3.0`
GTK3_CFLAGS := `pkg-config --cflags gio-2.0 gtk+-3.0 epoxy` -DGTK_DISABLE_DEPRECATED=1 -DG_DISABLE_DEPRECATED=1 -DRESOURCE_PREFIX=\"/io/github/sameboy/\" -DAPP_ID=\"io.github.sameboy\"
GTK3_LDFLAGS := `pkg-config --libs gio-2.0 gtk+-3.0 epoxy`
# TODO: REMOVE DISABLE UNUSED WARNINGS
GTK3_CFLAGS += -Wno-unused
ifeq ($(PLATFORM),windows32)
CFLAGS += -IWindows -Drandom=rand

180
gtk3/main.c
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@ -1,27 +1,87 @@
#include <gtk/gtk.h>
#include <epoxy/gl.h>
#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <Core/gb.h>
#include "shader.h"
#define str(x) #x
#define xstr(x) str(x)
#define RESOURCE_PREFIX "/io/github/sameboy/"
#define APP_ID "io.github.sameboy"
GtkBuilder *builder;
GtkWindow *main_window;
GtkGLArea *gl_area;
shader_t shader;
GB_gameboy_t gb;
static bool paused = false;
static uint32_t pixel_buffer_1[256 * 224], pixel_buffer_2[256 * 224];
static uint32_t *active_pixel_buffer = pixel_buffer_1, *previous_pixel_buffer = pixel_buffer_2;
static bool underclock_down = false, rewind_down = false, do_rewind = false, rewind_paused = false, turbo_down = false;
static double clock_mutliplier = 1.0;
static typeof(free) *free_function = NULL;
static char *battery_save_path_ptr;
typedef struct UserData {
bool fullscreen;
GFile *file;
} UserData;
typedef struct{
int16_t x, y;
uint16_t w, h;
} Rect;
static void run(UserData *user_data);
static Rect rect;
void render_texture(void *pixels, void *previous) {
static void *_pixels = NULL;
if (pixels) {
_pixels = pixels;
}
glClearColor(0, 0, 0, 1);
glClear(GL_COLOR_BUFFER_BIT);
render_bitmap_with_shader(&shader, _pixels, previous, GB_get_screen_width(&gb), GB_get_screen_height(&gb), rect.x, rect.y, rect.w, rect.h);
gtk_widget_queue_draw(GTK_WIDGET(gl_area));
}
void update_viewport(void) {
int win_width = gtk_widget_get_allocated_width(GTK_WIDGET(gl_area));
int win_height = gtk_widget_get_allocated_height(GTK_WIDGET(gl_area));
double x_factor = win_width / (double) GB_get_screen_width(&gb);
double y_factor = win_height / (double) GB_get_screen_height(&gb);
if (true /*configuration.scaling_mode == GB_SDL_SCALING_INTEGER_FACTOR*/) {
x_factor = (int)(x_factor);
y_factor = (int)(y_factor);
}
/*if (configuration.scaling_mode != GB_SDL_SCALING_ENTIRE_WINDOW) {
if (x_factor > y_factor) {
x_factor = y_factor;
}
else {
y_factor = x_factor;
}
}*/
unsigned new_width = x_factor * GB_get_screen_width(&gb);
unsigned new_height = y_factor * GB_get_screen_height(&gb);
rect = (Rect){(win_width - new_width) / 2, (win_height - new_height) / 2, new_width, new_height};
glViewport(rect.x, rect.y, rect.w, rect.h);
}
// Determines if a ComboBox entry should be converted into a separator.
// Each element with a text value of `<separator>` will be converted into a separator element.
static gboolean is_separator(GtkTreeModel *model, GtkTreeIter *iter, gpointer data) {
@ -108,6 +168,43 @@ G_MODULE_EXPORT void on_boot_rom_location_changed(GtkWidget *w, gpointer user_da
g_print("Active: %s", gtk_combo_box_get_active_id(box));
}
G_MODULE_EXPORT void gl_draw(GtkWidget *window) {
render_texture(active_pixel_buffer, NULL);
}
G_MODULE_EXPORT void gl_init(GtkWidget *window) {
const char *renderer;
GList *children = gtk_container_get_children(GTK_CONTAINER(window));
while (children) {
if (GTK_IS_GL_AREA(children->data)) {
gl_area = GTK_GL_AREA(children->data);
break;
}
children = children->next;
}
g_list_free(children);
if (gl_area == NULL) {
g_printerr("Unable to find GtkGLArea in window\n");
return;
}
gtk_gl_area_make_current(gl_area);
if (gtk_gl_area_get_error(gl_area) != NULL) {
return;
}
renderer = (char *) glGetString(GL_RENDERER);
g_print("GtkGLArea on %s\n", renderer ? renderer : "Unknown");
if (!init_shader_with_name(&shader, /*configuration.filter*/ "OmniScale")) {
init_shader_with_name(&shader, "NearestNeighbor");
}
}
// This functions gets called immediately after registration of the GApplication
static void startup(GApplication *app, gpointer user_data_gptr) {
// UserData *user_data = user_data_gptr;
@ -180,10 +277,6 @@ static void startup(GApplication *app, gpointer user_data_gptr) {
gtk_about_dialog_set_logo(about_dialog, g_list_nth_data(icon_list, 3)); // reuse the 64x64 icon
gtk_about_dialog_set_version(about_dialog, "v" xstr(VERSION));
g_list_free(icon_list);
GList *children = gtk_container_get_children(GTK_CONTAINER(main_window));
gl_area = GTK_GL_AREA(g_list_first(children));
g_list_free(children);
}
// This function gets called when the GApplication gets activated, i.e. it is ready to show widgets.
@ -197,6 +290,9 @@ static void activate(GApplication *app, gpointer user_data_gptr) {
g_signal_connect(main_window, "destroy", G_CALLBACK(gtk_main_quit), NULL);
gtk_application_add_window(GTK_APPLICATION(app), main_window);
gtk_widget_show_all(GTK_WIDGET(main_window));
update_viewport();
run(user_data);
}
// This function gets called when there are files to open.
@ -233,6 +329,76 @@ static gint handle_local_options(GApplication *app, GVariantDict *options, gpoin
return -1;
}
static uint32_t rgb_encode(GB_gameboy_t *gb, uint8_t r, uint8_t g, uint8_t b) {
uint32_t color = 0xFF000000 | (b << 16) | (g << 8) | r; // abgr
return color;
}
static void vblank(GB_gameboy_t *gb) {
// render_texture(active_pixel_buffer, NULL);
while (gtk_events_pending()) {
gtk_main_iteration();
}
}
static void run(UserData *user_data) {
GB_model_t model = GB_MODEL_CGB_E;
if (GB_is_inited(&gb)) {
GB_switch_model_and_reset(&gb, model);
}
else {
GB_init(&gb, model);
GB_set_vblank_callback(&gb, (GB_vblank_callback_t) vblank);
GB_set_pixels_output(&gb, active_pixel_buffer);
GB_set_rgb_encode_callback(&gb, rgb_encode);
// GB_set_sample_rate(&gb, have_aspec.freq);
// GB_set_color_correction_mode(&gb, configuration.color_correction_mode);
// GB_set_highpass_filter_mode(&gb, configuration.highpass_mode);
// GB_set_rewind_length(&gb, configuration.rewind_length);
// GB_set_update_input_hint_callback(&gb, handle_events);
// GB_apu_set_sample_callback(&gb, gb_audio_callback);
}
GError *gerror;
GBytes *boot_rom_f;
const guchar *boot_rom_data;
gsize boot_rom_size;
boot_rom_f = g_resources_lookup_data(RESOURCE_PREFIX "bootroms/cgb_boot.bin", G_RESOURCE_LOOKUP_FLAGS_NONE, &gerror);
boot_rom_data = g_bytes_get_data(boot_rom_f, &boot_rom_size);
GB_load_boot_rom_from_buffer(&gb, boot_rom_data, boot_rom_size);
if (user_data->file != NULL) {
GB_load_rom(&gb, g_file_get_path(user_data->file));
}
/* Run emulation */
while (true) {
if (paused || rewind_paused) {
while (gtk_events_pending()) {
gtk_main_iteration();
}
}
else {
if (do_rewind) {
GB_rewind_pop(&gb);
if (turbo_down) {
GB_rewind_pop(&gb);
}
if (!GB_rewind_pop(&gb)) {
rewind_paused = true;
}
do_rewind = false;
}
GB_run(&gb);
}
}
}
int main(int argc, char *argv[]) {
// Create our GApplication and tell GTK that we are able to handle files
GtkApplication *app = gtk_application_new(APP_ID, G_APPLICATION_HANDLES_OPEN);

6
gtk3/resources/ui/window.ui
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@ -979,6 +979,9 @@ Maximilian Mader https://github.com/max-m</property>
<property name="visible">True</property>
<property name="app_paintable">True</property>
<property name="can_focus">False</property>
<signal name="realize" handler="gl_init" object="main_no_titlebar" swapped="yes"/>
<signal name="render" handler="gl_draw" object="main_no_titlebar" swapped="yes"/>
<signal name="unrealize" handler="gl_finish" object="main_no_titlebar" swapped="yes"/>
</object>
</child>
</object>
@ -1017,6 +1020,9 @@ Maximilian Mader https://github.com/max-m</property>
<property name="visible">True</property>
<property name="app_paintable">True</property>
<property name="can_focus">False</property>
<signal name="realize" handler="gl_init" object="main_with_titlebar" swapped="yes"/>
<signal name="render" handler="gl_draw" object="main_with_titlebar" swapped="yes"/>
<signal name="unrealize" handler="gl_finish" object="main_with_titlebar" swapped="yes"/>
</object>
</child>
</object>

206
gtk3/shader.c Normal file
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@ -0,0 +1,206 @@
#include <glib.h>
#include <gio/gio.h>
#include "shader.h"
static const char *vertex_shader = "\n\
#version 150 \n\
in vec4 aPosition;\n\
void main(void) {\n\
gl_Position = aPosition;\n\
}\n\
";
static GLuint create_shader(const char *source, GLenum type)
{
// Create the shader object
GLuint shader = glCreateShader(type);
// Load the shader source
glShaderSource(shader, 1, &source, 0);
// Compile the shader
glCompileShader(shader);
// Check for errors
GLint status = 0;
glGetShaderiv(shader, GL_COMPILE_STATUS, &status);
if (status == GL_FALSE) {
GLchar messages[1024];
glGetShaderInfoLog(shader, sizeof(messages), 0, &messages[0]);
g_printerr("GLSL Shader Error: %s", messages);
}
return shader;
}
static GLuint create_program(const char *vsh, const char *fsh)
{
// Build shaders
GLuint vertex_shader = create_shader(vsh, GL_VERTEX_SHADER);
GLuint fragment_shader = create_shader(fsh, GL_FRAGMENT_SHADER);
// Create program
GLuint program = glCreateProgram();
// Attach shaders
glAttachShader(program, vertex_shader);
glAttachShader(program, fragment_shader);
// Link program
glLinkProgram(program);
// Check for errors
GLint status;
glGetProgramiv(program, GL_LINK_STATUS, &status);
if (status == GL_FALSE) {
GLchar messages[1024];
glGetProgramInfoLog(program, sizeof(messages), 0, &messages[0]);
g_printerr("GLSL Program Error: %s", messages);
}
// Delete shaders
glDeleteShader(vertex_shader);
glDeleteShader(fragment_shader);
return program;
}
bool init_shader_with_name(shader_t *shader, const char *name)
{
GLint major = 0, minor = 0;
glGetIntegerv(GL_MAJOR_VERSION, &major);
glGetIntegerv(GL_MINOR_VERSION, &minor);
if (major * 0x100 + minor < 0x302) {
return false;
}
GError *error;
GBytes *master_shader_f;
static const gchar *master_shader_code;
static gsize master_shader_code_size;
static char final_shader_code[0x10801] = {0,};
static signed long filter_token_location = 0;
if (!master_shader_code_size) {
master_shader_f = g_resources_lookup_data(RESOURCE_PREFIX "Shaders/MasterShader.fsh", G_RESOURCE_LOOKUP_FLAGS_NONE, &error);
master_shader_code = g_bytes_get_data(master_shader_f, &master_shader_code_size);
if (!master_shader_f) {
g_printerr("Failed to load master shader: %s", error->message);
return false;
}
filter_token_location = strstr(master_shader_code, "{filter}") - master_shader_code;
if (filter_token_location < 0) {
return false;
}
}
char shader_path[1024];
g_snprintf(shader_path, sizeof(shader_path), RESOURCE_PREFIX "Shaders/%s.fsh", name);
GBytes *shader_f = g_resources_lookup_data(shader_path, G_RESOURCE_LOOKUP_FLAGS_NONE, &error);
if (!shader_f) {
g_printerr("Failed to load shader \"%s\": %s", shader_path, error->message);
return false;
}
gsize shader_code_size;
const gchar *shader_code = g_bytes_get_data(shader_f, &shader_code_size);
memset(final_shader_code, 0, sizeof(final_shader_code));
memcpy(final_shader_code, master_shader_code, filter_token_location);
strcpy(final_shader_code + filter_token_location, shader_code);
strcat(final_shader_code + filter_token_location,
master_shader_code + filter_token_location + sizeof("{filter}") - 1);
shader->program = create_program(vertex_shader, final_shader_code);
// Attributes
shader->position_attribute = glGetAttribLocation(shader->program, "aPosition");
// Uniforms
shader->resolution_uniform = glGetUniformLocation(shader->program, "output_resolution");
shader->origin_uniform = glGetUniformLocation(shader->program, "origin");
glGenTextures(1, &shader->texture);
glBindTexture(GL_TEXTURE_2D, shader->texture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindTexture(GL_TEXTURE_2D, 0);
shader->texture_uniform = glGetUniformLocation(shader->program, "image");
glGenTextures(1, &shader->previous_texture);
glBindTexture(GL_TEXTURE_2D, shader->previous_texture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindTexture(GL_TEXTURE_2D, 0);
shader->previous_texture_uniform = glGetUniformLocation(shader->program, "previous_image");
shader->mix_previous_uniform = glGetUniformLocation(shader->program, "mix_previous");
// Program
glUseProgram(shader->program);
GLuint vao;
glGenVertexArrays(1, &vao);
glBindVertexArray(vao);
GLuint vbo;
glGenBuffers(1, &vbo);
// Attributes
static GLfloat const quad[16] = {
-1.f, -1.f, 0, 1,
-1.f, +1.f, 0, 1,
+1.f, -1.f, 0, 1,
+1.f, +1.f, 0, 1,
};
glBindBuffer(GL_ARRAY_BUFFER, vbo);
glBufferData(GL_ARRAY_BUFFER, sizeof(quad), quad, GL_STATIC_DRAW);
glEnableVertexAttribArray(shader->position_attribute);
glVertexAttribPointer(shader->position_attribute, 4, GL_FLOAT, GL_FALSE, 0, 0);
return true;
}
void render_bitmap_with_shader(shader_t *shader, void *bitmap, void *previous,
unsigned source_width, unsigned source_height,
unsigned x, unsigned y, unsigned w, unsigned h)
{
glUseProgram(shader->program);
glUniform2f(shader->origin_uniform, x, y);
glUniform2f(shader->resolution_uniform, w, h);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, shader->texture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, source_width, source_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, bitmap);
glUniform1i(shader->texture_uniform, 0);
glUniform1i(shader->mix_previous_uniform, previous != NULL);
if (previous) {
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, shader->previous_texture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, source_width, source_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, previous);
glUniform1i(shader->previous_texture_uniform, 1);
}
glBindFragDataLocation(shader->program, 0, "frag_color");
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
}
void free_shader(shader_t *shader)
{
GLint major = 0, minor = 0;
glGetIntegerv(GL_MAJOR_VERSION, &major);
glGetIntegerv(GL_MINOR_VERSION, &minor);
if (major * 0x100 + minor < 0x302) {
return;
}
glDeleteProgram(shader->program);
glDeleteTextures(1, &shader->texture);
glDeleteTextures(1, &shader->previous_texture);
}

25
gtk3/shader.h Normal file
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@ -0,0 +1,25 @@
#ifndef shader_h
#define shader_h
#include <epoxy/gl.h>
#include <stdbool.h>
typedef struct shader_s {
GLuint resolution_uniform;
GLuint origin_uniform;
GLuint texture_uniform;
GLuint previous_texture_uniform;
GLuint mix_previous_uniform;
GLuint position_attribute;
GLuint texture;
GLuint previous_texture;
GLuint program;
} shader_t;
bool init_shader_with_name(shader_t *shader, const char *name);
void render_bitmap_with_shader(shader_t *shader, void *bitmap, void *previous,
unsigned source_width, unsigned source_height,
unsigned x, unsigned y, unsigned w, unsigned h);
void free_shader(struct shader_s *shader);
#endif /* shader_h */