Merge pull request #24529 from akien-mga/opengl-2.1-lowp

GLES2: Define 'lowp' for OpenGL 2.1

drivers/gles2/shaders/canvas.glsl

@@ -2,6 +2,7 @@
 [vertex]
 
 #ifdef USE_GLES_OVER_GL
+#define lowp
 #define mediump
 #define highp
 #else
@@ -31,8 +32,6 @@ uniform vec4 src_rect;
 
 uniform highp float time;
 
-
-
 #ifdef USE_LIGHTING
 
 // light matrices
@@ -62,7 +61,6 @@ const bool at_light_pass = true;
 const bool at_light_pass = false;
 #endif
 
-
 /* clang-format off */
 
 VERTEX_SHADER_GLOBALS
@@ -80,7 +78,6 @@ vec2 select(vec2 a, vec2 b, bvec2 c) {
 
 void main() {
 
-
 	vec4 color = color_attrib;
 
 #ifdef USE_INSTANCING
@@ -159,13 +156,13 @@ VERTEX_SHADER_CODE
 #endif
 
 #endif
-
 }
 
 /* clang-format off */
 [fragment]
 
 #ifdef USE_GLES_OVER_GL
+#define lowp
 #define mediump
 #define highp
 #else
@@ -231,7 +228,6 @@ const bool at_light_pass = false;
 
 uniform bool use_default_normal;
 
-
 /* clang-format off */
 
 FRAGMENT_SHADER_GLOBALS

drivers/gles2/shaders/canvas_shadow.glsl

@@ -2,6 +2,7 @@
 [vertex]
 
 #ifdef USE_GLES_OVER_GL
+#define lowp
 #define mediump
 #define highp
 #else
@@ -29,6 +30,7 @@ void main() {
 [fragment]
 
 #ifdef USE_GLES_OVER_GL
+#define lowp
 #define mediump
 #define highp
 #else
@@ -39,7 +41,6 @@ precision mediump int;
 varying highp vec4 position_interp;
 /* clang-format on */
 
-
 void main() {
 
 	highp float depth = ((position_interp.z / position_interp.w) + 1.0) * 0.5 + 0.0; // bias

drivers/gles2/shaders/copy.glsl

@@ -2,6 +2,7 @@
 [vertex]
 
 #ifdef USE_GLES_OVER_GL
+#define lowp
 #define mediump
 #define highp
 #else
@@ -56,6 +57,7 @@ void main() {
 #define M_PI 3.14159265359
 
 #ifdef USE_GLES_OVER_GL
+#define lowp
 #define mediump
 #define highp
 #else

drivers/gles2/shaders/cube_to_dp.glsl

@@ -2,6 +2,7 @@
 [vertex]
 
 #ifdef USE_GLES_OVER_GL
+#define lowp
 #define mediump
 #define highp
 #else
@@ -25,6 +26,7 @@ void main() {
 [fragment]
 
 #ifdef USE_GLES_OVER_GL
+#define lowp
 #define mediump
 #define highp
 #else

drivers/gles2/shaders/cubemap_filter.glsl

@@ -2,6 +2,7 @@
 [vertex]
 
 #ifdef USE_GLES_OVER_GL
+#define lowp
 #define mediump
 #define highp
 #else
@@ -32,6 +33,7 @@ void main() {
 #endif
 
 #ifdef USE_GLES_OVER_GL
+#define lowp
 #define mediump
 #define highp
 #else

drivers/gles2/shaders/lens_distorted.glsl

@@ -2,6 +2,7 @@
 [vertex]
 
 #ifdef USE_GLES_OVER_GL
+#define lowp
 #define mediump
 #define highp
 #else
@@ -29,6 +30,7 @@ void main() {
 [fragment]
 
 #ifdef USE_GLES_OVER_GL
+#define lowp
 #define mediump
 #define highp
 #else

drivers/gles2/shaders/scene.glsl

@@ -2,6 +2,7 @@
 [vertex]
 
 #ifdef USE_GLES_OVER_GL
+#define lowp
 #define mediump
 #define highp
 #else
@@ -653,6 +654,7 @@ VERTEX_SHADER_CODE
 #endif
 
 #ifdef USE_GLES_OVER_GL
+#define lowp
 #define mediump
 #define highp
 #else