renderer/gles2: Interpret matrix as column major in shader

Avoids us needing to transpose.

render/gles2/renderer.c

@@ -309,10 +309,6 @@ static bool gles2_render_subtexture_with_matrix(
 	float gl_matrix[9];
 	wlr_matrix_multiply(gl_matrix, renderer->projection, matrix);
 
-	// OpenGL ES 2 requires the glUniformMatrix3fv transpose parameter to be set
-	// to GL_FALSE
-	wlr_matrix_transpose(gl_matrix, gl_matrix);
-
 	push_gles2_debug(renderer);
 
 	if (!texture->has_alpha && alpha == 1.0) {
@@ -368,10 +364,6 @@ static void gles2_render_quad_with_matrix(struct wlr_renderer *wlr_renderer,
 	float gl_matrix[9];
 	wlr_matrix_multiply(gl_matrix, renderer->projection, matrix);
 
-	// OpenGL ES 2 requires the glUniformMatrix3fv transpose parameter to be set
-	// to GL_FALSE
-	wlr_matrix_transpose(gl_matrix, gl_matrix);
-
 	push_gles2_debug(renderer);
 
 	if (color[3] == 1.0) {

render/gles2/shaders/common.vert

@@ -4,6 +4,6 @@ attribute vec2 texcoord;
 varying vec2 v_texcoord;
 
 void main() {
-	gl_Position = vec4(proj * vec3(pos, 1.0), 1.0);
+	gl_Position = vec4(vec3(pos, 1.0) * proj, 1.0);
 	v_texcoord = texcoord;
 }