Add option --no-mipmaps

Add an option to disable trilinear filtering even if mipmapping is
available.

app/scrcpy.1

@@ -74,6 +74,10 @@ Disable device control (mirror the device in read\-only).
 .B \-N, \-\-no\-display
 Do not display device (only when screen recording is enabled).
 
+.TP
+.B \-\-no\-mipmaps
+If the renderer is OpenGL 3.0+ or OpenGL ES 2.0+, then mipmaps are automatically generated to improve downscaling quality. This option disables the generation of mipmaps.
+
 .TP
 .BI "\-p, \-\-port " port[:port]
 Set the TCP port (range) used by the client to listen.

app/src/cli.c

@@ -75,6 +75,11 @@ scrcpy_print_usage(const char *arg0) {
         "        Do not display device (only when screen recording is\n"
         "        enabled).\n"
         "\n"
+        "    --no-mipmaps\n"
+        "        If the renderer is OpenGL 3.0+ or OpenGL ES 2.0+, then\n"
+        "        mipmaps are automatically generated to improve downscaling\n"
+        "        quality. This option disables the generation of mipmaps.\n"
+        "\n"
         "    -p, --port port[:port]\n"
         "        Set the TCP port (range) used by the client to listen.\n"
         "        Default is %d:%d.\n"
@@ -462,6 +467,7 @@ guess_record_format(const char *filename) {
 #define OPT_DISPLAY_ID             1014
 #define OPT_ROTATION               1015
 #define OPT_RENDER_DRIVER          1016
+#define OPT_NO_MIPMAPS             1017
 
 bool
 scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
@@ -478,6 +484,7 @@ scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
         {"max-size",               required_argument, NULL, 'm'},
         {"no-control",             no_argument,       NULL, 'n'},
         {"no-display",             no_argument,       NULL, 'N'},
+        {"no-mipmaps",             no_argument,       NULL, OPT_NO_MIPMAPS},
         {"port",                   required_argument, NULL, 'p'},
         {"push-target",            required_argument, NULL, OPT_PUSH_TARGET},
         {"record",                 required_argument, NULL, 'r'},
@@ -629,6 +636,9 @@ scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
             case OPT_RENDER_DRIVER:
                 opts->render_driver = optarg;
                 break;
+            case OPT_NO_MIPMAPS:
+                opts->mipmaps = false;
+                break;
             default:
                 // getopt prints the error message on stderr
                 return false;

app/src/scrcpy.c

@@ -401,7 +401,7 @@ scrcpy(const struct scrcpy_options *options) {
                                    options->window_y, options->window_width,
                                    options->window_height,
                                    options->window_borderless,
-                                   options->rotation)) {
+                                   options->rotation, options-> mipmaps)) {
             goto end;
         }
 

app/src/scrcpy.h

@@ -37,6 +37,7 @@ struct scrcpy_options {
     bool render_expired_frames;
     bool prefer_text;
     bool window_borderless;
+    bool mipmaps;
 };
 
 #define SCRCPY_OPTIONS_DEFAULT { \
@@ -70,6 +71,7 @@ struct scrcpy_options {
     .render_expired_frames = false, \
     .prefer_text = false, \
     .window_borderless = false, \
+    .mipmaps = true, \
 }
 
 bool

app/src/screen.c

@@ -199,7 +199,7 @@ screen_init_rendering(struct screen *screen, const char *window_title,
                       struct size frame_size, bool always_on_top,
                       int16_t window_x, int16_t window_y, uint16_t window_width,
                       uint16_t window_height, bool window_borderless,
-                      uint8_t rotation) {
+                      uint8_t rotation, bool mipmaps) {
     screen->frame_size = frame_size;
     screen->rotation = rotation;
     if (rotation) {
@@ -266,6 +266,7 @@ screen_init_rendering(struct screen *screen, const char *window_title,
 
         LOGI("OpenGL version: %s", gl->version);
 
+        if (mipmaps) {
             bool supports_mipmaps =
                 sc_opengl_version_at_least(gl, 3, 0, /* OpenGL 3.0+ */
                                                2, 0  /* OpenGL ES 2.0+ */);
@@ -276,6 +277,9 @@ screen_init_rendering(struct screen *screen, const char *window_title,
                 LOGW("Trilinear filtering disabled "
                      "(OpenGL 3.0+ or ES 2.0+ required)");
             }
+        } else {
+            LOGI("Trilinear filtering disabled");
+        }
     } else {
         LOGW("Trilinear filtering disabled (not an OpenGL renderer)");
     }

app/src/screen.h

@@ -76,7 +76,7 @@ screen_init_rendering(struct screen *screen, const char *window_title,
                       struct size frame_size, bool always_on_top,
                       int16_t window_x, int16_t window_y, uint16_t window_width,
                       uint16_t window_height, bool window_borderless,
-                      uint8_t rotation);
+                      uint8_t rotation, bool mipmaps);
 
 // show the window
 void