diff options
Diffstat (limited to 'platform/ios/app/LimeGreenStyleLayer.m')
-rw-r--r-- | platform/ios/app/LimeGreenStyleLayer.m | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/platform/ios/app/LimeGreenStyleLayer.m b/platform/ios/app/LimeGreenStyleLayer.m new file mode 100644 index 0000000000..63cc7c8d4d --- /dev/null +++ b/platform/ios/app/LimeGreenStyleLayer.m @@ -0,0 +1,64 @@ + + +#import "LimeGreenStyleLayer.h" + +#import "LimeGreenStyleLayer.h" +@import OpenGLES; +//#include <OpenGL/gl.h> +//#include <OpenGL/glext.h> + +@implementation LimeGreenStyleLayer { + GLuint _program; + GLuint _vertexShader; + GLuint _fragmentShader; + GLuint _buffer; + GLuint _aPos; +} + +- (void)didMoveToMapView:(MGLMapView *)mapView { + static const GLchar *vertexShaderSource = "attribute vec2 a_pos; void main() { gl_Position = vec4(a_pos, 0, 1); }"; + static const GLchar *fragmentShaderSource = "void main() { gl_FragColor = vec4(0, 1, 0, 1); }"; + + _program = glCreateProgram(); + _vertexShader = glCreateShader(GL_VERTEX_SHADER); + _fragmentShader = glCreateShader(GL_FRAGMENT_SHADER); + + glShaderSource(_vertexShader, 1, &vertexShaderSource, NULL); + glCompileShader(_vertexShader); + glAttachShader(_program, _vertexShader); + glShaderSource(_fragmentShader, 1, &fragmentShaderSource, NULL); + glCompileShader(_fragmentShader); + glAttachShader(_program, _fragmentShader); + glLinkProgram(_program); + _aPos = glGetAttribLocation(_program, "a_pos"); + + GLfloat background[] = { -1,-1, 1,-1, -1,1, 1,1 }; + glGenBuffers(1, &_buffer); + glBindBuffer(GL_ARRAY_BUFFER, _buffer); + glBufferData(GL_ARRAY_BUFFER, 8 * sizeof(GLfloat), background, GL_STATIC_DRAW); +} + +- (void)drawInMapView:(MGLMapView *)mapView withContext:(MGLStyleLayerDrawingContext)context { + glUseProgram(_program); + glBindBuffer(GL_ARRAY_BUFFER, _buffer); + glEnableVertexAttribArray(_aPos); + glVertexAttribPointer(_aPos, 2, GL_FLOAT, GL_FALSE, 0, NULL); + glDisable(GL_STENCIL_TEST); + glDisable(GL_DEPTH_TEST); + glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); +} + +- (void)willMoveFromMapView:(MGLMapView *)mapView { + if (!_program) { + return; + } + + glDeleteBuffers(1, &_buffer); + glDetachShader(_program, _vertexShader); + glDetachShader(_program, _fragmentShader); + glDeleteShader(_vertexShader); + glDeleteShader(_fragmentShader); + glDeleteProgram(_program); +} + +@end |