#define MAP_SIZE 65536
#define MAP_NUM 4
-#define UPDATES_PER_RENDER 100
typedef uint8_t *vga_map; // points to MAP_SIZE data
#define VGA_FONT_WIDTH 8
#define VGA_MAX_FONT_HEIGHT 32
+struct vga_render_model {
+ uint32_t model; // composite the following
+
+#define VGA_DRIVEN_PERIODIC_RENDERING 0x1 // render after n GPU updates
+#define CONSOLE_ADVISORY_RENDERING 0x2 // ask console if we should render following an update
+#define CONSOLE_DRIVEN_RENDERING 0x4 // have console tell us when to render
+
+ uint32_t updates_before_render; // defaults to the following
+
+#define DEFAULT_UPDATES_BEFORE_RENDER 1000
+};
+
struct vga_misc_regs {
/* Read: 0x3cc; Write: 0x3c2 */
struct vga_misc_out_reg vga_misc_out;
struct vga_internal {
struct vm_device *dev;
-
+
bool passthrough;
bool skip_next_passthrough_out; // for word access
struct v3_frame_buffer_spec target_spec;
v3_graphics_console_t host_cons;
+ struct vga_render_model render_model;
uint32_t updates_since_render;
s=&(vga->target_spec);
- if (fb && s->height>=768 && s->width>=1024 && !(vga->updates_since_render % 100)) {
+ if (fb && s->height>=768 && s->width>=1024 ) {
// we draw the maps next, each being a 256x256 block appearing 32 pixels below the display block
uint8_t m;
uint32_t x,y;
}
}
+static int render_core(struct vga_internal *vga)
+{
+ void *fb;
+
+ PrintDebug("vga: render on update %u\n",vga->updates_since_render);
+
+ fb = v3_graphics_console_get_frame_buffer_data_rw(vga->host_cons,&(vga->target_spec));
+
+ if (!(vga->vga_sequencer.vga_clocking_mode.screen_off)) {
+ if (vga->vga_attribute_controller.vga_attribute_mode_control.graphics) {
+ render_graphics(vga,fb);
+ } else {
+ render_text(vga,fb);
+ render_text_cursor(vga,fb);
+ }
+ } else {
+ render_black(vga,fb);
+ }
+
+ if (0) { render_test(vga,fb); }
+
+ // always render maps for now
+ render_maps(vga,fb);
+
+ v3_graphics_console_release_frame_buffer_data_rw(vga->host_cons);
+
+ vga->updates_since_render=0;
+
+ return 0;
+
+}
+
static int render(struct vga_internal *vga)
{
- void *fb;
-
vga->updates_since_render++;
- if (vga->updates_since_render%100) {
- // skip render
+
+ if (vga->host_cons) {
+ int do_render=0;
+
+ if ((vga->render_model.model & VGA_DRIVEN_PERIODIC_RENDERING)
+ &&
+ (vga->updates_since_render > vga->render_model.updates_before_render)) {
+ PrintDebug("vga: render due to periodic\n");
+
+ do_render = 1;
+ }
+
+ if ((vga->render_model.model & CONSOLE_ADVISORY_RENDERING)
+ &&
+ (v3_graphics_console_inform_update(vga->host_cons) > 0) ) {
+
+ PrintDebug("vga: render due to advisory\n");
+
+ do_render = 1;
+ }
+
+ // note that CONSOLE_DRIVEN_RENDERING is handled via the render_callback() function
+
+ if (do_render) {
+ return render_core(vga);
+ } else {
return 0;
+ }
}
+ return 0;
+
+}
- if (vga->host_cons && v3_graphics_console_inform_update(vga->host_cons)>0) {
-
- fb = v3_graphics_console_get_frame_buffer_data_rw(vga->host_cons,&(vga->target_spec));
-
- if (!(vga->vga_sequencer.vga_clocking_mode.screen_off)) {
- if (vga->vga_attribute_controller.vga_attribute_mode_control.graphics) {
- render_graphics(vga,fb);
- } else {
- render_text(vga,fb);
- render_text_cursor(vga,fb);
- }
- } else {
- render_black(vga,fb);
- }
-
- if (0) { render_test(vga,fb); }
- // always render maps for now
- render_maps(vga,fb);
+static int render_callback(v3_graphics_console_t cons,
+ void *priv)
+{
+ struct vga_internal *vga = (struct vga_internal *) priv;
+
+ PrintDebug("vga: render due to callback\n");
- v3_graphics_console_release_frame_buffer_data_rw(vga->host_cons);
- }
+ return render_core(vga);
+}
- return 0;
+static int update_callback(v3_graphics_console_t cons,
+ void *priv)
+{
+ struct vga_internal *vga = (struct vga_internal *) priv;
+
+ return vga->updates_since_render>0;
}
+
static void get_mem_region(struct vga_internal *vga, uint64_t *mem_start, uint64_t *mem_end)
{
switch (vga->vga_graphics_controller.vga_misc.memory_map) {
memset(vga, 0, sizeof(struct vga_internal));
+ vga->render_model.model = CONSOLE_DRIVEN_RENDERING | VGA_DRIVEN_PERIODIC_RENDERING;
+ vga->render_model.updates_before_render = DEFAULT_UPDATES_BEFORE_RENDER;
+
if (passthrough && strcasecmp(passthrough,"enable")==0) {
PrintDebug("vga: enabling passthrough\n");
vga->passthrough=true;
PrintDebug("vga: response: %u by %u by %u with %u bpc and r,g,b at %u, %u, %u\n", vga->target_spec.width, vga->target_spec.height, vga->target_spec.bytes_per_pixel, vga->target_spec.bits_per_channel, vga->target_spec.red_offset, vga->target_spec.green_offset, vga->target_spec.blue_offset);
}
- }
+
+ if (vga->render_model.model & CONSOLE_DRIVEN_RENDERING) {
+ V3_Print("vga: enabling console-driven rendering\n");
+ if (v3_graphics_console_register_render_request(vga->host_cons, render_callback, vga)!=0) {
+ PrintError("vga: cannot enable console-driven rendering\n");
+ free_vga(vga);
+ return -1;
+ }
+ }
+
+ V3_Print("vga: enabling console inquiry for updates\n");
+ if (v3_graphics_console_register_update_inquire(vga->host_cons, update_callback, vga)!=0) {
+ PrintError("vga: cannot enable console inquiry for updates\n");
+ free_vga(vga);
+ return -1;
+ }
+ }
if (!vga->passthrough && !vga->host_cons) {
V3_Print("vga: neither passthrough nor host console are enabled - no way to display anything!\n");
