Reland of Split iOS sdk in to separate targets

webrtc/sdk/objc/Framework/Classes/RTCShader.mm

Index: webrtc/sdk/objc/Framework/Classes/RTCShader.mm
diff --git a/webrtc/sdk/objc/Framework/Classes/RTCShader.mm b/webrtc/sdk/objc/Framework/Classes/RTCShader.mm
deleted file mode 100644
index 155a0165a13a2ca8b3ef0eaf7dff3f4abb49de46..0000000000000000000000000000000000000000
--- a/webrtc/sdk/objc/Framework/Classes/RTCShader.mm
+++ /dev/null
@@ -1,184 +0,0 @@
-/*
- *  Copyright 2016 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#import "RTCShader.h"
-
-#include <algorithm>
-#include <array>
-#include <memory>
-
-#import "RTCShader+Private.h"
-
-#include "webrtc/base/checks.h"
-#include "webrtc/base/logging.h"
-
-// Vertex shader doesn't do anything except pass coordinates through.
-const char kRTCVertexShaderSource[] =
-  SHADER_VERSION
-  VERTEX_SHADER_IN " vec2 position;\n"
-  VERTEX_SHADER_IN " vec2 texcoord;\n"
-  VERTEX_SHADER_OUT " vec2 v_texcoord;\n"
-  "void main() {\n"
-  "    gl_Position = vec4(position.x, position.y, 0.0, 1.0);\n"
-  "    v_texcoord = texcoord;\n"
-  "}\n";
-
-// Compiles a shader of the given |type| with GLSL source |source| and returns
-// the shader handle or 0 on error.
-GLuint RTCCreateShader(GLenum type, const GLchar *source) {
-  GLuint shader = glCreateShader(type);
-  if (!shader) {
-    return 0;
-  }
-  glShaderSource(shader, 1, &source, NULL);
-  glCompileShader(shader);
-  GLint compileStatus = GL_FALSE;
-  glGetShaderiv(shader, GL_COMPILE_STATUS, &compileStatus);
-  if (compileStatus == GL_FALSE) {
-    GLint logLength = 0;
-    // The null termination character is included in the returned log length.
-    glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &logLength);
-    if (logLength > 0) {
-      std::unique_ptr<char[]> compileLog(new char[logLength]);
-      // The returned string is null terminated.
-      glGetShaderInfoLog(shader, logLength, NULL, compileLog.get());
-      LOG(LS_ERROR) << "Shader compile error: " << compileLog.get();
-    }
-    glDeleteShader(shader);
-    shader = 0;
-  }
-  return shader;
-}
-
-// Links a shader program with the given vertex and fragment shaders and
-// returns the program handle or 0 on error.
-GLuint RTCCreateProgram(GLuint vertexShader, GLuint fragmentShader) {
-  if (vertexShader == 0 || fragmentShader == 0) {
-    return 0;
-  }
-  GLuint program = glCreateProgram();
-  if (!program) {
-    return 0;
-  }
-  glAttachShader(program, vertexShader);
-  glAttachShader(program, fragmentShader);
-  glLinkProgram(program);
-  GLint linkStatus = GL_FALSE;
-  glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
-  if (linkStatus == GL_FALSE) {
-    glDeleteProgram(program);
-    program = 0;
-  }
-  return program;
-}
-
-// Creates and links a shader program with the given fragment shader source and
-// a plain vertex shader. Returns the program handle or 0 on error.
-GLuint RTCCreateProgramFromFragmentSource(const char fragmentShaderSource[]) {
-  GLuint vertexShader = RTCCreateShader(GL_VERTEX_SHADER, kRTCVertexShaderSource);
-  RTC_CHECK(vertexShader) << "failed to create vertex shader";
-  GLuint fragmentShader =
-      RTCCreateShader(GL_FRAGMENT_SHADER, fragmentShaderSource);
-  RTC_CHECK(fragmentShader) << "failed to create fragment shader";
-  GLuint program = RTCCreateProgram(vertexShader, fragmentShader);
-  // Shaders are created only to generate program.
-  if (vertexShader) {
-    glDeleteShader(vertexShader);
-  }
-  if (fragmentShader) {
-    glDeleteShader(fragmentShader);
-  }
-  return program;
-}
-
-// Set vertex shader variables 'position' and 'texcoord' in |program| to use
-// |vertexBuffer| and |vertexArray| to store the vertex data.
-BOOL RTCSetupVerticesForProgram(GLuint program, GLuint* vertexBuffer, GLuint* vertexArray) {
-  GLint position = glGetAttribLocation(program, "position");
-  GLint texcoord = glGetAttribLocation(program, "texcoord");
-  if (position < 0 || texcoord < 0) {
-    return NO;
-  }
-#if !TARGET_OS_IPHONE
-  glGenVertexArrays(1, vertexArray);
-  if (*vertexArray == 0) {
-    return NO;
-  }
-  glBindVertexArray(*vertexArray);
-#endif
-  glGenBuffers(1, vertexBuffer);
-  if (*vertexBuffer == 0) {
-    return NO;
-  }
-  glBindBuffer(GL_ARRAY_BUFFER, *vertexBuffer);
-  glBufferData(GL_ARRAY_BUFFER, 4 * 4 * sizeof(GLfloat), NULL, GL_DYNAMIC_DRAW);
-
-  // Read position attribute with size of 2 and stride of 4 beginning at the
-  // start of the array. The last argument indicates offset of data within the
-  // vertex buffer.
-  glVertexAttribPointer(position, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(GLfloat),
-                        (void *)0);
-  glEnableVertexAttribArray(position);
-
-  // Read texcoord attribute from |gVertices| with size of 2 and stride of 4
-  // beginning at the first texcoord in the array. The last argument indicates
-  // offset of data within |gVertices| as supplied to the vertex buffer.
-  glVertexAttribPointer(texcoord, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(GLfloat),
-                        (void *)(2 * sizeof(GLfloat)));
-  glEnableVertexAttribArray(texcoord);
-
-  return YES;
-}
-
-// Set vertex data to the currently bound vertex buffer.
-void RTCSetVertexData(RTCVideoRotation rotation) {
-  // When modelview and projection matrices are identity (default) the world is
-  // contained in the square around origin with unit size 2. Drawing to these
-  // coordinates is equivalent to drawing to the entire screen. The texture is
-  // stretched over that square using texture coordinates (u, v) that range
-  // from (0, 0) to (1, 1) inclusive. Texture coordinates are flipped vertically
-  // here because the incoming frame has origin in upper left hand corner but
-  // OpenGL expects origin in bottom left corner.
-  std::array<std::array<GLfloat, 2>, 4> UVCoords = {{
-      {{0, 1}},  // Lower left.
-      {{1, 1}},  // Lower right.
-      {{1, 0}},  // Upper right.
-      {{0, 0}},  // Upper left.
-  }};
-
-  // Rotate the UV coordinates.
-  int rotation_offset;
-  switch (rotation) {
-    case RTCVideoRotation_0:
-      rotation_offset = 0;
-      break;
-    case RTCVideoRotation_90:
-      rotation_offset = 1;
-      break;
-    case RTCVideoRotation_180:
-      rotation_offset = 2;
-      break;
-    case RTCVideoRotation_270:
-      rotation_offset = 3;
-      break;
-  }
-  std::rotate(UVCoords.begin(), UVCoords.begin() + rotation_offset,
-              UVCoords.end());
-
-  const GLfloat gVertices[] = {
-      // X, Y, U, V.
-      -1, -1, UVCoords[0][0], UVCoords[0][1],
-       1, -1, UVCoords[1][0], UVCoords[1][1],
-       1,  1, UVCoords[2][0], UVCoords[2][1],
-      -1,  1, UVCoords[3][0], UVCoords[3][1],
-  };
-
-  glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(gVertices), gVertices);
-}