--- /dev/null
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "GLCompositor"
+
+#include <sstream>
+#include <string>
+#include <vector>
+
+#include <cutils/log.h>
+
+#define EGL_EGLEXT_PROTOTYPES
+#define GL_GLEXT_PROTOTYPES
+
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+#include <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+
+#include <hardware/hardware.h>
+#include <hardware/hwcomposer.h>
+
+#include <ui/GraphicBuffer.h>
+#include <ui/PixelFormat.h>
+
+#include <cutils/properties.h>
+#include <sync/sync.h>
+#include <sw_sync.h>
+
+#include "drm_hwcomposer.h"
+
+#include "gl_compositor.h"
+#include "seperate_rects.h"
+
+// TODO(zachr): use hwc_drm_bo to turn buffer handles into textures
+#ifndef EGL_NATIVE_HANDLE_ANDROID_NVX
+#define EGL_NATIVE_HANDLE_ANDROID_NVX 0x322A
+#endif
+
+#define MAX_OVERLAPPING_LAYERS 64
+
+namespace android {
+
+struct GLCompositor::texture_from_handle {
+ EGLImageKHR image;
+ GLuint texture;
+};
+
+static const char *get_gl_error(void);
+static const char *get_egl_error(void);
+static bool has_extension(const char *extension, const char *extensions);
+
+template <typename T>
+int AllocResource(std::vector<T> &array) {
+ for (typename std::vector<T>::iterator it = array.begin(); it != array.end();
+ ++it) {
+ if (!it->is_some()) {
+ return std::distance(array.begin(), it);
+ }
+ }
+
+ array.push_back(T());
+ return array.size() - 1;
+}
+
+template <typename T>
+void FreeResource(std::vector<T> &array, int index) {
+ if (index == (int)array.size() - 1) {
+ array.pop_back();
+ } else if (index >= 0 && (unsigned)index < array.size()) {
+ array[index].Reset();
+ }
+}
+
+struct GLTarget {
+ sp<GraphicBuffer> fb;
+ EGLImageKHR egl_fb_image;
+ GLuint gl_fb;
+ GLuint gl_fb_tex;
+ bool forgotten;
+ unsigned composition_count;
+
+ GLTarget()
+ : egl_fb_image(EGL_NO_IMAGE_KHR),
+ gl_fb(0),
+ gl_fb_tex(0),
+ forgotten(true),
+ composition_count(0) {
+ }
+
+ void Reset() {
+ fb.clear();
+ egl_fb_image = EGL_NO_IMAGE_KHR;
+ gl_fb = 0;
+ gl_fb_tex = 0;
+ forgotten = true;
+ composition_count = 0;
+ }
+
+ bool is_some() const {
+ return egl_fb_image != EGL_NO_IMAGE_KHR;
+ }
+};
+
+struct GLCompositor::priv_data {
+ EGLDisplay egl_display;
+ EGLContext egl_ctx;
+
+ EGLDisplay saved_egl_display;
+ EGLContext saved_egl_ctx;
+ EGLSurface saved_egl_read;
+ EGLSurface saved_egl_draw;
+
+ int current_target;
+ std::vector<GLTarget> targets;
+ std::vector<GLComposition *> compositions;
+
+ std::vector<GLint> blend_programs;
+ GLuint vertex_buffer;
+
+ priv_data()
+ : egl_display(EGL_NO_DISPLAY),
+ egl_ctx(EGL_NO_CONTEXT),
+ saved_egl_display(EGL_NO_DISPLAY),
+ saved_egl_ctx(EGL_NO_CONTEXT),
+ saved_egl_read(EGL_NO_SURFACE),
+ saved_egl_draw(EGL_NO_SURFACE),
+ current_target(-1) {
+ }
+};
+
+class GLComposition : public Composition {
+ public:
+ struct LayerData {
+ hwc_layer_1 layer;
+ hwc_drm_bo bo;
+ };
+
+ GLComposition(GLCompositor *owner) : compositor(owner), target_handle(-1) {
+ }
+
+ virtual ~GLComposition() {
+ if (compositor == NULL) {
+ return;
+ }
+
+ // Removes this composition from the owning compositor automatically.
+ std::vector<GLComposition *> &compositions =
+ compositor->priv_->compositions;
+ std::vector<GLComposition *>::iterator it =
+ std::find(compositions.begin(), compositions.end(), this);
+ if (it != compositions.end()) {
+ compositions.erase(it);
+ }
+
+ GLTarget *target = &compositor->priv_->targets[target_handle];
+ target->composition_count--;
+ compositor->CheckAndDestroyTarget(target_handle);
+ }
+
+ virtual int AddLayer(int display, hwc_layer_1 *layer, hwc_drm_bo *bo) {
+ (void)display;
+ if (layer->compositionType != HWC_OVERLAY) {
+ ALOGE("Must add layers with compositionType == HWC_OVERLAY");
+ return 1;
+ }
+
+ if (layer->handle == 0) {
+ ALOGE("Must add layers with valid buffer handle");
+ return 1;
+ }
+
+ layer_data.push_back(LayerData());
+ LayerData &layer_datum = layer_data.back();
+ layer_datum.layer = *layer;
+ layer_datum.bo = *bo;
+
+ return 0;
+ }
+
+ virtual unsigned GetRemainingLayers(int display, unsigned num_needed) const {
+ (void)display;
+ return num_needed;
+ }
+
+ GLCompositor *compositor;
+ int target_handle;
+ std::vector<LayerData> layer_data;
+};
+
+struct RenderingCommand {
+ struct TextureSource {
+ unsigned texture_index;
+ float crop_bounds[4];
+ float alpha;
+ };
+
+ float bounds[4];
+ unsigned texture_count;
+ TextureSource textures[MAX_OVERLAPPING_LAYERS];
+
+ RenderingCommand() : texture_count(0) {
+ }
+};
+
+static void ConstructCommands(const GLComposition &composition,
+ std::vector<RenderingCommand> *commands) {
+ std::vector<seperate_rects::Rect<float> > in_rects;
+ std::vector<seperate_rects::RectSet<uint64_t, float> > out_rects;
+ int i;
+
+ for (unsigned rect_index = 0; rect_index < composition.layer_data.size();
+ rect_index++) {
+ const struct hwc_layer_1 &layer = composition.layer_data[rect_index].layer;
+ seperate_rects::Rect<float> rect;
+ in_rects.push_back(seperate_rects::Rect<float>(
+ layer.displayFrame.left, layer.displayFrame.top,
+ layer.displayFrame.right, layer.displayFrame.bottom));
+ }
+
+ seperate_frects_64(in_rects, &out_rects);
+
+ for (unsigned rect_index = 0; rect_index < out_rects.size(); rect_index++) {
+ const seperate_rects::RectSet<uint64_t, float> &out_rect =
+ out_rects[rect_index];
+ commands->push_back(RenderingCommand());
+ RenderingCommand &cmd = commands->back();
+
+ memcpy(cmd.bounds, out_rect.rect.bounds, sizeof(cmd.bounds));
+
+ uint64_t tex_set = out_rect.id_set.getBits();
+ for (unsigned i = composition.layer_data.size() - 1; tex_set != 0x0; i--) {
+ if (tex_set & (0x1 << i)) {
+ tex_set &= ~(0x1 << i);
+
+ const struct hwc_layer_1 &layer = composition.layer_data[i].layer;
+
+ seperate_rects::Rect<float> display_rect(
+ layer.displayFrame.left, layer.displayFrame.top,
+ layer.displayFrame.right, layer.displayFrame.bottom);
+ float display_size[2] = {
+ display_rect.bounds[2] - display_rect.bounds[0],
+ display_rect.bounds[3] - display_rect.bounds[1]};
+
+ seperate_rects::Rect<float> crop_rect(
+ layer.sourceCropf.left, layer.sourceCropf.top,
+ layer.sourceCropf.right, layer.sourceCropf.bottom);
+ float crop_size[2] = {crop_rect.bounds[2] - crop_rect.bounds[0],
+ crop_rect.bounds[3] - crop_rect.bounds[1]};
+
+ RenderingCommand::TextureSource &src = cmd.textures[cmd.texture_count];
+ cmd.texture_count++;
+ src.texture_index = i;
+
+ for (int b = 0; b < 4; b++) {
+ float bound_percent = (cmd.bounds[b] - display_rect.bounds[b % 2]) /
+ display_size[b % 2];
+ src.crop_bounds[b] =
+ crop_rect.bounds[b % 2] + bound_percent * crop_size[b % 2];
+ }
+
+ if (layer.blending == HWC_BLENDING_NONE) {
+ src.alpha = 1.0f;
+ // This layer is opaque. There is no point in using layers below this
+ // one.
+ break;
+ }
+
+ src.alpha = layer.planeAlpha / 255.0f;
+ }
+ }
+ }
+}
+
+GLCompositor::GLCompositor() {
+ priv_ = new priv_data;
+}
+
+GLCompositor::~GLCompositor() {
+ if (BeginContext()) {
+ goto destroy_ctx;
+ }
+
+ glBindFramebuffer(GL_FRAMEBUFFER, 0);
+ glBindTexture(GL_TEXTURE_2D, 0);
+
+ for (std::vector<GLTarget>::iterator it = priv_->targets.end();
+ it != priv_->targets.begin(); it = priv_->targets.end()) {
+ --it;
+ glDeleteFramebuffers(1, &it->gl_fb);
+ glDeleteTextures(1, &it->gl_fb_tex);
+ eglDestroyImageKHR(priv_->egl_display, it->egl_fb_image);
+ priv_->targets.erase(it);
+ }
+
+ for (std::vector<GLComposition *>::iterator it = priv_->compositions.end();
+ it != priv_->compositions.begin(); it = priv_->compositions.end()) {
+ --it;
+
+ // Prevents compositor from trying to erase itself
+ (*it)->compositor = NULL;
+ delete *it;
+ priv_->compositions.erase(it);
+ }
+
+destroy_ctx:
+ eglMakeCurrent(priv_->egl_display,
+ EGL_NO_SURFACE /* No default draw surface */,
+ EGL_NO_SURFACE /* No default draw read */, EGL_NO_CONTEXT);
+ eglDestroyContext(priv_->egl_display, priv_->egl_ctx);
+
+ EndContext();
+ delete priv_;
+}
+
+int GLCompositor::Init() {
+ int ret = 0;
+ const char *egl_extensions;
+ const char *gl_extensions;
+ EGLint num_configs;
+ EGLint attribs[] = {EGL_WIDTH, 1, EGL_HEIGHT, 1, EGL_NONE, EGL_NONE};
+ EGLConfig egl_config;
+
+ // clang-format off
+ const GLfloat verts[] = {
+ 0.0f, 0.0f, 0.0f, 0.0f,
+ 0.0f, 1.0f, 0.0f, 1.0f,
+ 1.0f, 0.0f, 1.0f, 0.0f,
+ 1.0f, 1.0f, 1.0f, 1.0f
+ };
+ // clang-format on
+
+ const EGLint config_attribs[] = {EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
+ EGL_RED_SIZE, 8, EGL_GREEN_SIZE, 8,
+ EGL_BLUE_SIZE, 8, EGL_NONE};
+
+ const EGLint context_attribs[] = {EGL_CONTEXT_CLIENT_VERSION, 3, EGL_NONE};
+
+ priv_->egl_display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+ if (priv_->egl_display == EGL_NO_DISPLAY) {
+ ALOGE("Failed to get egl display");
+ ret = 1;
+ goto out;
+ }
+
+ if (!eglInitialize(priv_->egl_display, NULL, NULL)) {
+ ALOGE("Failed to initialize egl: %s", get_egl_error());
+ ret = 1;
+ goto out;
+ }
+
+ egl_extensions = eglQueryString(priv_->egl_display, EGL_EXTENSIONS);
+
+ // These extensions are all technically required but not always reported due
+ // to meta EGL filtering them out.
+ if (!has_extension("EGL_KHR_image_base", egl_extensions))
+ ALOGW("EGL_KHR_image_base extension not supported");
+
+ if (!has_extension("EGL_ANDROID_image_native_buffer", egl_extensions))
+ ALOGW("EGL_ANDROID_image_native_buffer extension not supported");
+
+ if (!has_extension("EGL_ANDROID_native_fence_sync", egl_extensions))
+ ALOGW("EGL_ANDROID_native_fence_sync extension not supported");
+
+ if (!eglChooseConfig(priv_->egl_display, config_attribs, &egl_config, 1,
+ &num_configs)) {
+ ALOGE("eglChooseConfig() failed with error: %s", get_egl_error());
+ goto out;
+ }
+
+ priv_->egl_ctx =
+ eglCreateContext(priv_->egl_display, egl_config,
+ EGL_NO_CONTEXT /* No shared context */, context_attribs);
+
+ if (priv_->egl_ctx == EGL_NO_CONTEXT) {
+ ALOGE("Failed to create OpenGL ES Context: %s", get_egl_error());
+ ret = 1;
+ goto out;
+ }
+
+ ret = BeginContext();
+ if (ret)
+ goto out;
+
+ gl_extensions = (const char *)glGetString(GL_EXTENSIONS);
+
+ if (!has_extension("GL_OES_EGL_image", gl_extensions))
+ ALOGW("GL_OES_EGL_image extension not supported");
+
+ glGenBuffers(1, &priv_->vertex_buffer);
+ glBindBuffer(GL_ARRAY_BUFFER, priv_->vertex_buffer);
+ glBufferData(GL_ARRAY_BUFFER, sizeof(verts), verts, GL_STATIC_DRAW);
+ glBindBuffer(GL_ARRAY_BUFFER, 0);
+
+ if (GenerateShaders()) {
+ ret = 1;
+ goto end_ctx;
+ }
+
+end_ctx:
+ EndContext();
+
+out:
+ return ret;
+}
+
+Targeting *GLCompositor::targeting() {
+ return (Targeting *)this;
+}
+
+int GLCompositor::CreateTarget(sp<GraphicBuffer> &buffer) {
+ int ret;
+
+ ret = BeginContext();
+ if (ret)
+ return -1;
+
+ int target_handle = AllocResource(priv_->targets);
+ GLTarget *target = &priv_->targets[target_handle];
+
+ target->fb = buffer;
+
+ target->egl_fb_image = eglCreateImageKHR(
+ priv_->egl_display, EGL_NO_CONTEXT, EGL_NATIVE_BUFFER_ANDROID,
+ (EGLClientBuffer)target->fb->getNativeBuffer(), NULL /* no attribs */);
+
+ if (target->egl_fb_image == EGL_NO_IMAGE_KHR) {
+ ALOGE("Failed to make image from target buffer: %s", get_egl_error());
+ ret = -1;
+ goto fail_create_image;
+ }
+
+ glGenTextures(1, &target->gl_fb_tex);
+ glBindTexture(GL_TEXTURE_2D, target->gl_fb_tex);
+ glEGLImageTargetTexture2DOES(GL_TEXTURE_2D,
+ (GLeglImageOES)target->egl_fb_image);
+ glBindTexture(GL_TEXTURE_2D, 0);
+
+ glGenFramebuffers(1, &target->gl_fb);
+ glBindFramebuffer(GL_FRAMEBUFFER, target->gl_fb);
+ glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
+ target->gl_fb_tex, 0);
+
+ if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
+ ALOGE("Failed framebuffer check for created target buffer");
+ ret = 1;
+ goto fail_framebuffer_status;
+ }
+
+ target->forgotten = false;
+
+ ret = target_handle;
+ goto out;
+
+fail_framebuffer_status:
+ glBindFramebuffer(GL_FRAMEBUFFER, 0);
+ glDeleteFramebuffers(1, &target->gl_fb);
+ glDeleteTextures(1, &target->gl_fb_tex);
+ eglDestroyImageKHR(priv_->egl_display, target->egl_fb_image);
+ target->gl_fb = 0;
+ target->gl_fb_tex = 0;
+ target->egl_fb_image = EGL_NO_IMAGE_KHR;
+
+fail_create_image:
+ target->fb.clear();
+ FreeResource(priv_->targets, target_handle);
+
+out:
+ EndContext();
+ return ret;
+}
+
+void GLCompositor::SetTarget(int target_handle) {
+ if (target_handle >= 0 && (unsigned)target_handle < priv_->targets.size()) {
+ GLTarget *target = &priv_->targets[target_handle];
+ if (target->is_some()) {
+ priv_->current_target = target_handle;
+ return;
+ }
+ }
+
+ priv_->current_target = -1;
+}
+
+void GLCompositor::ForgetTarget(int target_handle) {
+ if (target_handle >= 0 && (unsigned)target_handle < priv_->targets.size()) {
+ if (target_handle == priv_->current_target) {
+ priv_->current_target = -1;
+ }
+
+ GLTarget *target = &priv_->targets[target_handle];
+ if (target->is_some()) {
+ target->forgotten = true;
+ CheckAndDestroyTarget(target_handle);
+ return;
+ }
+ }
+
+ ALOGE("Failed to forget target because of invalid handle");
+}
+
+void GLCompositor::CheckAndDestroyTarget(int target_handle) {
+ GLTarget *target = &priv_->targets[target_handle];
+ if (target->composition_count == 0 && target->forgotten) {
+ if (BeginContext() == 0) {
+ glDeleteFramebuffers(1, &target->gl_fb);
+ glDeleteTextures(1, &target->gl_fb_tex);
+ eglDestroyImageKHR(priv_->egl_display, target->egl_fb_image);
+ EndContext();
+ }
+
+ FreeResource(priv_->targets, target_handle);
+ }
+}
+
+Composition *GLCompositor::CreateComposition() {
+ if (priv_->current_target >= 0 &&
+ (unsigned)priv_->current_target < priv_->targets.size()) {
+ GLTarget *target = &priv_->targets[priv_->current_target];
+ if (target->is_some()) {
+ GLComposition *composition = new GLComposition(this);
+ composition->target_handle = priv_->current_target;
+ target->composition_count++;
+ priv_->compositions.push_back(composition);
+ return composition;
+ }
+ }
+
+ ALOGE("Failed to create composition because of invalid target handle %d",
+ priv_->current_target);
+
+ return NULL;
+}
+
+int GLCompositor::QueueComposition(Composition *composition) {
+ if (composition) {
+ int ret = DoComposition(*(GLComposition *)composition);
+ delete composition;
+ return ret;
+ }
+
+ ALOGE("Failed to queue composition because of invalid composition handle");
+
+ return -EINVAL;
+}
+
+int GLCompositor::Composite() {
+ return 0;
+}
+
+int GLCompositor::BeginContext() {
+ priv_->saved_egl_display = eglGetCurrentDisplay();
+ priv_->saved_egl_ctx = eglGetCurrentContext();
+
+ if (priv_->saved_egl_display != priv_->egl_display ||
+ priv_->saved_egl_ctx != priv_->egl_ctx) {
+ priv_->saved_egl_read = eglGetCurrentSurface(EGL_READ);
+ priv_->saved_egl_draw = eglGetCurrentSurface(EGL_DRAW);
+ } else {
+ return 0;
+ }
+
+ if (!eglMakeCurrent(priv_->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
+ priv_->egl_ctx)) {
+ ALOGE("Failed to make the OpenGL ES Context current: %s", get_egl_error());
+ return 1;
+ }
+ return 0;
+}
+
+int GLCompositor::EndContext() {
+ if (priv_->saved_egl_display != eglGetCurrentDisplay() ||
+ priv_->saved_egl_ctx != eglGetCurrentContext()) {
+ if (!eglMakeCurrent(priv_->saved_egl_display, priv_->saved_egl_read,
+ priv_->saved_egl_draw, priv_->saved_egl_ctx)) {
+ ALOGE("Failed to make the OpenGL ES Context current: %s",
+ get_egl_error());
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+GLint CompileAndCheckShader(GLenum type, unsigned source_count,
+ const GLchar **sources, std::string *shader_log) {
+ GLint status;
+ GLint shader = glCreateShader(type);
+ if (!shader) {
+ *shader_log = "glCreateShader failed";
+ return 0;
+ }
+ glShaderSource(shader, source_count, sources, NULL);
+ glCompileShader(shader);
+ glGetShaderiv(shader, GL_COMPILE_STATUS, &status);
+ if (!status) {
+ if (shader_log) {
+ GLint log_length;
+ glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &log_length);
+ shader_log->resize(log_length);
+ glGetShaderInfoLog(shader, log_length, NULL, &(*shader_log)[0]);
+ }
+ glDeleteShader(shader);
+ return 0;
+ }
+
+ return shader;
+}
+
+int GLCompositor::GenerateShaders() {
+ // Limits: GL_MAX_VARYING_COMPONENTS, GL_MAX_TEXTURE_IMAGE_UNITS,
+ // GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS
+ // clang-format off
+ const GLchar *shader_preamble = "#version 300 es\n#define LAYER_COUNT ";
+
+ const GLchar *vertex_shader_source =
+"\n"
+"precision mediump int; \n"
+"uniform vec4 uViewport; \n"
+"uniform sampler2D uLayerTextures[LAYER_COUNT]; \n"
+"uniform vec4 uLayerCrop[LAYER_COUNT]; \n"
+"in vec2 vPosition; \n"
+"in vec2 vTexCoords; \n"
+"out vec2 fTexCoords[LAYER_COUNT]; \n"
+"void main() { \n"
+" for (int i = 0; i < LAYER_COUNT; i++) { \n"
+" fTexCoords[i] = (uLayerCrop[i].xy + vTexCoords * uLayerCrop[i].zw) / \n"
+" vec2(textureSize(uLayerTextures[i], 0)); \n"
+" } \n"
+" vec2 scaledPosition = uViewport.xy + vPosition * uViewport.zw; \n"
+" gl_Position = vec4(scaledPosition * vec2(2.0) - vec2(1.0), 0.0, 1.0); \n"
+"} \n";
+
+ const GLchar *fragment_shader_source =
+"\n"
+"precision mediump float; \n"
+"uniform sampler2D uLayerTextures[LAYER_COUNT]; \n"
+"uniform float uLayerAlpha[LAYER_COUNT]; \n"
+"in vec2 fTexCoords[LAYER_COUNT]; \n"
+"out vec4 oFragColor; \n"
+"void main() { \n"
+" vec3 color = vec3(0.0, 0.0, 0.0); \n"
+" float alphaCover = 1.0; \n"
+" for (int i = 0; i < LAYER_COUNT; i++) { \n"
+" vec4 texSample = texture(uLayerTextures[i], fTexCoords[i]); \n"
+" float a = texSample.a * uLayerAlpha[i]; \n"
+" color += a * alphaCover * texSample.rgb; \n"
+" alphaCover *= 1.0 - a; \n"
+" if (alphaCover <= 0.5/255.0) \n"
+" break; \n"
+" } \n"
+" oFragColor = vec4(color, 1.0); \n"
+"} \n";
+ // clang-format on
+
+ int i, ret = 1;
+ GLint max_texture_images, vertex_shader, fragment_shader, program, status;
+ std::string shader_log;
+
+ glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &max_texture_images);
+
+ for (i = 1; i <= max_texture_images; i++) {
+ std::ostringstream layer_count_formatter;
+ layer_count_formatter << i;
+ std::string layer_count(layer_count_formatter.str());
+ const GLchar *shader_sources[3] = {shader_preamble, layer_count.c_str(),
+ NULL};
+
+ shader_sources[2] = vertex_shader_source;
+ vertex_shader = CompileAndCheckShader(GL_VERTEX_SHADER, 3, shader_sources,
+ ret ? &shader_log : NULL);
+ if (!vertex_shader) {
+ if (ret) {
+ ALOGE("Failed to make vertex shader:\n%s", shader_log.c_str());
+ }
+ break;
+ }
+
+ shader_sources[2] = fragment_shader_source;
+ fragment_shader = CompileAndCheckShader(
+ GL_FRAGMENT_SHADER, 3, shader_sources, ret ? &shader_log : NULL);
+ if (!fragment_shader) {
+ if (ret) {
+ ALOGE("Failed to make fragment shader:\n%s", shader_log.c_str());
+ }
+ goto delete_vs;
+ }
+
+ program = glCreateProgram();
+ if (!program) {
+ if (ret)
+ ALOGE("Failed to create program %s", get_gl_error());
+ goto delete_fs;
+ }
+
+ glAttachShader(program, vertex_shader);
+ glAttachShader(program, fragment_shader);
+ glBindAttribLocation(program, 0, "vPosition");
+ glBindAttribLocation(program, 1, "vTexCoords");
+ glLinkProgram(program);
+ glDetachShader(program, vertex_shader);
+ glDeleteShader(vertex_shader);
+ glDetachShader(program, fragment_shader);
+ glDeleteShader(fragment_shader);
+
+ glGetProgramiv(program, GL_LINK_STATUS, &status);
+ if (!status) {
+ if (ret) {
+ GLint log_length;
+ glGetProgramiv(program, GL_INFO_LOG_LENGTH, &log_length);
+ std::string program_log(log_length, ' ');
+ glGetProgramInfoLog(program, log_length, NULL, &program_log[0]);
+ ALOGE("Failed to link program: \n%s", program_log.c_str());
+ }
+ glDeleteProgram(program);
+ break;
+ }
+
+ ret = 0;
+ priv_->blend_programs.push_back(program);
+
+ continue;
+
+ delete_fs:
+ glDeleteShader(fragment_shader);
+
+ delete_vs:
+ glDeleteShader(vertex_shader);
+
+ if (ret)
+ break;
+ }
+
+ return ret;
+}
+
+int GLCompositor::DoComposition(const GLComposition &composition) {
+ int ret = 0;
+ size_t i;
+ std::vector<struct texture_from_handle> layer_textures;
+ std::vector<RenderingCommand> commands;
+
+ if (composition.layer_data.size() == 0) {
+ return -EALREADY;
+ }
+
+ if (BeginContext()) {
+ return -EINVAL;
+ }
+
+ GLTarget *target = &priv_->targets[composition.target_handle];
+ GLint frame_width = target->fb->getWidth();
+ GLint frame_height = target->fb->getHeight();
+ EGLSyncKHR finished_sync;
+
+ for (i = 0; i < composition.layer_data.size(); i++) {
+ const struct hwc_layer_1 *layer = &composition.layer_data[i].layer;
+
+ if (ret) {
+ if (layer->acquireFenceFd >= 0)
+ close(layer->acquireFenceFd);
+ continue;
+ }
+
+ layer_textures.push_back(texture_from_handle());
+ ret = CreateTextureFromHandle(layer->handle, &layer_textures.back());
+ if (!ret) {
+ ret = DoFenceWait(layer->acquireFenceFd);
+ }
+ if (ret) {
+ layer_textures.pop_back();
+ ret = -EINVAL;
+ }
+ }
+
+ if (ret) {
+ goto destroy_textures;
+ }
+
+ ConstructCommands(composition, &commands);
+
+ glBindFramebuffer(GL_FRAMEBUFFER, target->gl_fb);
+
+ glViewport(0, 0, frame_width, frame_height);
+
+ glClearColor(1.0f, 1.0f, 0.0f, 1.0f);
+ glClear(GL_COLOR_BUFFER_BIT);
+
+ glBindBuffer(GL_ARRAY_BUFFER, priv_->vertex_buffer);
+ glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, sizeof(float) * 4, NULL);
+ glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(float) * 4,
+ (void *)(sizeof(float) * 2));
+ glEnableVertexAttribArray(0);
+ glEnableVertexAttribArray(1);
+
+ for (std::vector<RenderingCommand>::iterator it = commands.begin();
+ it != commands.end(); ++it) {
+ const RenderingCommand &cmd = *it;
+
+ if (cmd.texture_count <= 0) {
+ continue;
+ }
+
+ // TODO(zachr): handle the case of too many overlapping textures for one
+ // area by falling back to rendering as many layers as possible using
+ // multiple blending passes.
+ if (cmd.texture_count > priv_->blend_programs.size()) {
+ ALOGE("Too many layers to render in one area");
+ continue;
+ }
+
+ GLint program = priv_->blend_programs[cmd.texture_count - 1];
+ glUseProgram(program);
+ GLint gl_viewport_loc = glGetUniformLocation(program, "uViewport");
+ GLint gl_tex_loc = glGetUniformLocation(program, "uLayerTextures");
+ GLint gl_crop_loc = glGetUniformLocation(program, "uLayerCrop");
+ GLint gl_alpha_loc = glGetUniformLocation(program, "uLayerAlpha");
+ glUniform4f(gl_viewport_loc, cmd.bounds[0] / (float)frame_width,
+ cmd.bounds[1] / (float)frame_height,
+ (cmd.bounds[2] - cmd.bounds[0]) / (float)frame_width,
+ (cmd.bounds[3] - cmd.bounds[1]) / (float)frame_height);
+
+ for (unsigned src_index = 0; src_index < cmd.texture_count; src_index++) {
+ const RenderingCommand::TextureSource &src = cmd.textures[src_index];
+ glUniform1f(gl_alpha_loc + src_index, src.alpha);
+ glUniform4f(gl_crop_loc + src_index, src.crop_bounds[0],
+ src.crop_bounds[1], src.crop_bounds[2] - src.crop_bounds[0],
+ src.crop_bounds[3] - src.crop_bounds[1]);
+
+ glUniform1i(gl_tex_loc + src_index, src_index);
+ glActiveTexture(GL_TEXTURE0 + src_index);
+ glBindTexture(GL_TEXTURE_2D, layer_textures[src.texture_index].texture);
+ }
+
+ glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+
+ for (unsigned src_index = 0; src_index < cmd.texture_count; src_index++) {
+ glActiveTexture(GL_TEXTURE0 + src_index);
+ glBindTexture(GL_TEXTURE_2D, 0);
+ }
+ }
+
+ glActiveTexture(GL_TEXTURE0);
+ glDisableVertexAttribArray(0);
+ glDisableVertexAttribArray(1);
+ glBindBuffer(GL_ARRAY_BUFFER, 0);
+ glUseProgram(0);
+
+ glBindFramebuffer(GL_FRAMEBUFFER, 0);
+
+ finished_sync =
+ eglCreateSyncKHR(priv_->egl_display, EGL_SYNC_NATIVE_FENCE_ANDROID, NULL);
+ if (finished_sync != EGL_NO_SYNC_KHR) {
+ glFlush(); // Creates the syncpoint
+ ret = eglDupNativeFenceFDANDROID(priv_->egl_display, finished_sync);
+ eglDestroySyncKHR(priv_->egl_display, finished_sync);
+ if (ret != EGL_NO_NATIVE_FENCE_FD_ANDROID) {
+ goto destroy_textures;
+ }
+ }
+
+ // Used as a fallback if the native sync fence fails.
+ ret = -EALREADY;
+ glFinish();
+
+destroy_textures:
+ for (i = 0; i < layer_textures.size(); i++)
+ DestroyTextureFromHandle(layer_textures[i]);
+
+ EndContext();
+
+ return ret;
+}
+
+int GLCompositor::DoFenceWait(int acquireFenceFd) {
+ int ret = 0;
+
+ EGLint attribs[] = {EGL_SYNC_NATIVE_FENCE_FD_ANDROID, acquireFenceFd,
+ EGL_NONE};
+ EGLSyncKHR egl_sync = eglCreateSyncKHR(
+ priv_->egl_display, EGL_SYNC_NATIVE_FENCE_ANDROID, attribs);
+ if (egl_sync == EGL_NO_SYNC_KHR) {
+ ALOGE("Failed to make EGLSyncKHR from acquireFenceFd: %s", get_egl_error());
+ close(acquireFenceFd);
+ return 1;
+ }
+
+ EGLint success = eglWaitSyncKHR(priv_->egl_display, egl_sync, 0);
+ if (success == EGL_FALSE) {
+ ALOGE("Failed to wait for acquire: %s", get_egl_error());
+ ret = 1;
+ }
+ eglDestroySyncKHR(priv_->egl_display, egl_sync);
+
+ return ret;
+}
+
+int GLCompositor::CreateTextureFromHandle(buffer_handle_t handle,
+ struct texture_from_handle *tex) {
+ EGLImageKHR image = eglCreateImageKHR(
+ priv_->egl_display, EGL_NO_CONTEXT, EGL_NATIVE_HANDLE_ANDROID_NVX,
+ (EGLClientBuffer)handle, NULL /* no attribs */);
+
+ if (image == EGL_NO_IMAGE_KHR) {
+ ALOGE("Failed to make image %s %p", get_egl_error(), handle);
+ return 1;
+ }
+
+ glGenTextures(1, &tex->texture);
+ glBindTexture(GL_TEXTURE_2D, tex->texture);
+ glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, (GLeglImageOES)image);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+ tex->image = image;
+
+ return 0;
+}
+
+void GLCompositor::DestroyTextureFromHandle(
+ const struct texture_from_handle &tex) {
+ glDeleteTextures(1, &tex.texture);
+ eglDestroyImageKHR(priv_->egl_display, tex.image);
+}
+
+static const char *get_gl_error(void) {
+ switch (glGetError()) {
+ case GL_NO_ERROR:
+ return "GL_NO_ERROR";
+ case GL_INVALID_ENUM:
+ return "GL_INVALID_ENUM";
+ case GL_INVALID_VALUE:
+ return "GL_INVALID_VALUE";
+ case GL_INVALID_OPERATION:
+ return "GL_INVALID_OPERATION";
+ case GL_INVALID_FRAMEBUFFER_OPERATION:
+ return "GL_INVALID_FRAMEBUFFER_OPERATION";
+ case GL_OUT_OF_MEMORY:
+ return "GL_OUT_OF_MEMORY";
+ default:
+ return "Unknown error";
+ }
+}
+
+static const char *get_egl_error(void) {
+ switch (eglGetError()) {
+ case EGL_SUCCESS:
+ return "EGL_SUCCESS";
+ case EGL_NOT_INITIALIZED:
+ return "EGL_NOT_INITIALIZED";
+ case EGL_BAD_ACCESS:
+ return "EGL_BAD_ACCESS";
+ case EGL_BAD_ALLOC:
+ return "EGL_BAD_ALLOC";
+ case EGL_BAD_ATTRIBUTE:
+ return "EGL_BAD_ATTRIBUTE";
+ case EGL_BAD_CONTEXT:
+ return "EGL_BAD_CONTEXT";
+ case EGL_BAD_CONFIG:
+ return "EGL_BAD_CONFIG";
+ case EGL_BAD_CURRENT_SURFACE:
+ return "EGL_BAD_CURRENT_SURFACE";
+ case EGL_BAD_DISPLAY:
+ return "EGL_BAD_DISPLAY";
+ case EGL_BAD_SURFACE:
+ return "EGL_BAD_SURFACE";
+ case EGL_BAD_MATCH:
+ return "EGL_BAD_MATCH";
+ case EGL_BAD_PARAMETER:
+ return "EGL_BAD_PARAMETER";
+ case EGL_BAD_NATIVE_PIXMAP:
+ return "EGL_BAD_NATIVE_PIXMAP";
+ case EGL_BAD_NATIVE_WINDOW:
+ return "EGL_BAD_NATIVE_WINDOW";
+ case EGL_CONTEXT_LOST:
+ return "EGL_CONTEXT_LOST";
+ default:
+ return "Unknown error";
+ }
+}
+
+static bool has_extension(const char *extension, const char *extensions) {
+ const char *start, *where, *terminator;
+ start = extensions;
+ for (;;) {
+ where = (char *)strstr((const char *)start, extension);
+ if (!where)
+ break;
+ terminator = where + strlen(extension);
+ if (where == start || *(where - 1) == ' ')
+ if (*terminator == ' ' || *terminator == '\0')
+ return true;
+ start = terminator;
+ }
+ return false;
+}
+
+} // namespace android
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