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cef/tests/cefclient/browser/osr_renderer.cc

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// Copyright (c) 2012 The Chromium Embedded Framework Authors. All rights
// reserved. Use of this source code is governed by a BSD-style license
// that can be found in the LICENSE file.
#include "cefclient/browser/osr_renderer.h"
#if defined(OS_WIN)
#include <gl/gl.h>
#include <gl/glu.h>
#elif defined(OS_MACOSX)
#include <OpenGL/gl.h>
#elif defined(OS_LINUX)
#include <GL/gl.h>
#include <GL/glu.h>
#else
#error Platform is not supported.
#endif
#include "include/wrapper/cef_helpers.h"
#ifndef GL_BGR
#define GL_BGR 0x80E0
#endif
#ifndef GL_BGRA
#define GL_BGRA 0x80E1
#endif
#ifndef GL_UNSIGNED_INT_8_8_8_8_REV
#define GL_UNSIGNED_INT_8_8_8_8_REV 0x8367
#endif
// DCHECK on gl errors.
#ifndef NDEBUG
#define VERIFY_NO_ERROR { \
int _gl_error = glGetError(); \
DCHECK(_gl_error == GL_NO_ERROR) << \
"glGetError returned " << _gl_error; \
}
#else
#define VERIFY_NO_ERROR
#endif
namespace client {
OsrRenderer::Settings::Settings()
: transparent(false),
show_update_rect(false),
background_color(CefColorSetARGB(255, 255, 255, 255)) {
}
OsrRenderer::OsrRenderer(const Settings& settings)
: settings_(settings),
initialized_(false),
texture_id_(0),
view_width_(0),
view_height_(0),
spin_x_(0),
spin_y_(0) {
}
OsrRenderer::~OsrRenderer() {
Cleanup();
}
void OsrRenderer::Initialize() {
if (initialized_)
return;
glHint(GL_POLYGON_SMOOTH_HINT, GL_NICEST); VERIFY_NO_ERROR;
glClearColor(float(CefColorGetR(settings_.background_color)) / 255.0f,
float(CefColorGetG(settings_.background_color)) / 255.0f,
float(CefColorGetB(settings_.background_color)) / 255.0f,
1.0f); VERIFY_NO_ERROR;
// Necessary for non-power-of-2 textures to render correctly.
glPixelStorei(GL_UNPACK_ALIGNMENT, 1); VERIFY_NO_ERROR;
// Create the texture.
glGenTextures(1, &texture_id_); VERIFY_NO_ERROR;
DCHECK_NE(texture_id_, 0U); VERIFY_NO_ERROR;
glBindTexture(GL_TEXTURE_2D, texture_id_); VERIFY_NO_ERROR;
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
GL_NEAREST); VERIFY_NO_ERROR;
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
GL_NEAREST); VERIFY_NO_ERROR;
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); VERIFY_NO_ERROR;
initialized_ = true;
}
void OsrRenderer::Cleanup() {
if (texture_id_ != 0)
glDeleteTextures(1, &texture_id_);
}
void OsrRenderer::Render() {
if (view_width_ == 0 || view_height_ == 0)
return;
DCHECK(initialized_);
struct {
float tu, tv;
float x, y, z;
} static vertices[] = {
{0.0f, 1.0f, -1.0f, -1.0f, 0.0f},
{1.0f, 1.0f, 1.0f, -1.0f, 0.0f},
{1.0f, 0.0f, 1.0f, 1.0f, 0.0f},
{0.0f, 0.0f, -1.0f, 1.0f, 0.0f}
};
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); VERIFY_NO_ERROR;
glMatrixMode(GL_MODELVIEW); VERIFY_NO_ERROR;
glLoadIdentity(); VERIFY_NO_ERROR;
// Match GL units to screen coordinates.
glViewport(0, 0, view_width_, view_height_); VERIFY_NO_ERROR;
glMatrixMode(GL_PROJECTION); VERIFY_NO_ERROR;
glLoadIdentity(); VERIFY_NO_ERROR;
// Draw the background gradient.
glPushAttrib(GL_ALL_ATTRIB_BITS); VERIFY_NO_ERROR;
// Don't check for errors until glEnd().
glBegin(GL_QUADS);
glColor4f(1.0, 0.0, 0.0, 1.0); // red
glVertex2f(-1.0, -1.0);
glVertex2f(1.0, -1.0);
glColor4f(0.0, 0.0, 1.0, 1.0); // blue
glVertex2f(1.0, 1.0);
glVertex2f(-1.0, 1.0);
glEnd(); VERIFY_NO_ERROR;
glPopAttrib(); VERIFY_NO_ERROR;
// Rotate the view based on the mouse spin.
if (spin_x_ != 0) {
glRotatef(-spin_x_, 1.0f, 0.0f, 0.0f); VERIFY_NO_ERROR;
}
if (spin_y_ != 0) {
glRotatef(-spin_y_, 0.0f, 1.0f, 0.0f); VERIFY_NO_ERROR;
}
if (settings_.transparent) {
// Alpha blending style. Texture values have premultiplied alpha.
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA); VERIFY_NO_ERROR;
// Enable alpha blending.
glEnable(GL_BLEND); VERIFY_NO_ERROR;
}
// Enable 2D textures.
glEnable(GL_TEXTURE_2D); VERIFY_NO_ERROR;
// Draw the facets with the texture.
DCHECK_NE(texture_id_, 0U); VERIFY_NO_ERROR;
glBindTexture(GL_TEXTURE_2D, texture_id_); VERIFY_NO_ERROR;
glInterleavedArrays(GL_T2F_V3F, 0, vertices); VERIFY_NO_ERROR;
glDrawArrays(GL_QUADS, 0, 4); VERIFY_NO_ERROR;
// Disable 2D textures.
glDisable(GL_TEXTURE_2D); VERIFY_NO_ERROR;
if (settings_.transparent) {
// Disable alpha blending.
glDisable(GL_BLEND); VERIFY_NO_ERROR;
}
// Draw a rectangle around the update region.
if (settings_.show_update_rect && !update_rect_.IsEmpty()) {
int left = update_rect_.x;
int right = update_rect_.x + update_rect_.width;
int top = update_rect_.y;
int bottom = update_rect_.y + update_rect_.height;
#if defined(OS_LINUX)
// Shrink the box so that top & right sides are drawn.
top += 1;
right -= 1;
#else
// Shrink the box so that left & bottom sides are drawn.
left += 1;
bottom -= 1;
#endif
glPushAttrib(GL_ALL_ATTRIB_BITS); VERIFY_NO_ERROR
glMatrixMode(GL_PROJECTION); VERIFY_NO_ERROR;
glPushMatrix(); VERIFY_NO_ERROR;
glLoadIdentity(); VERIFY_NO_ERROR;
glOrtho(0, view_width_, view_height_, 0, 0, 1); VERIFY_NO_ERROR;
glLineWidth(1); VERIFY_NO_ERROR;
glColor3f(1.0f, 0.0f, 0.0f); VERIFY_NO_ERROR;
// Don't check for errors until glEnd().
glBegin(GL_LINE_STRIP);
glVertex2i(left, top);
glVertex2i(right, top);
glVertex2i(right, bottom);
glVertex2i(left, bottom);
glVertex2i(left, top);
glEnd(); VERIFY_NO_ERROR;
glPopMatrix(); VERIFY_NO_ERROR;
glPopAttrib(); VERIFY_NO_ERROR;
}
}
void OsrRenderer::OnPopupShow(CefRefPtr<CefBrowser> browser,
bool show) {
if (!show) {
// Clear the popup rectangle.
ClearPopupRects();
}
}
void OsrRenderer::OnPopupSize(CefRefPtr<CefBrowser> browser,
const CefRect& rect) {
if (rect.width <= 0 || rect.height <= 0)
return;
original_popup_rect_ = rect;
popup_rect_ = GetPopupRectInWebView(original_popup_rect_);
}
CefRect OsrRenderer::GetPopupRectInWebView(const CefRect& original_rect) {
CefRect rc(original_rect);
// if x or y are negative, move them to 0.
if (rc.x < 0)
rc.x = 0;
if (rc.y < 0)
rc.y = 0;
// if popup goes outside the view, try to reposition origin
if (rc.x + rc.width > view_width_)
rc.x = view_width_ - rc.width;
if (rc.y + rc.height > view_height_)
rc.y = view_height_ - rc.height;
// if x or y became negative, move them to 0 again.
if (rc.x < 0)
rc.x = 0;
if (rc.y < 0)
rc.y = 0;
return rc;
}
void OsrRenderer::ClearPopupRects() {
popup_rect_.Set(0, 0, 0, 0);
original_popup_rect_.Set(0, 0, 0, 0);
}
void OsrRenderer::OnPaint(CefRefPtr<CefBrowser> browser,
CefRenderHandler::PaintElementType type,
const CefRenderHandler::RectList& dirtyRects,
const void* buffer, int width, int height) {
if (!initialized_)
Initialize();
if (settings_.transparent) {
// Enable alpha blending.
glEnable(GL_BLEND); VERIFY_NO_ERROR;
}
// Enable 2D textures.
glEnable(GL_TEXTURE_2D); VERIFY_NO_ERROR;
DCHECK_NE(texture_id_, 0U);
glBindTexture(GL_TEXTURE_2D, texture_id_); VERIFY_NO_ERROR;
if (type == PET_VIEW) {
int old_width = view_width_;
int old_height = view_height_;
view_width_ = width;
view_height_ = height;
if (settings_.show_update_rect)
update_rect_ = dirtyRects[0];
glPixelStorei(GL_UNPACK_ROW_LENGTH, view_width_); VERIFY_NO_ERROR;
if (old_width != view_width_ || old_height != view_height_ ||
(dirtyRects.size() == 1 &&
dirtyRects[0] == CefRect(0, 0, view_width_, view_height_))) {
// Update/resize the whole texture.
glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0); VERIFY_NO_ERROR;
glPixelStorei(GL_UNPACK_SKIP_ROWS, 0); VERIFY_NO_ERROR;
glTexImage2D(
GL_TEXTURE_2D, 0, GL_RGBA, view_width_, view_height_, 0,
GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, buffer); VERIFY_NO_ERROR;
} else {
// Update just the dirty rectangles.
CefRenderHandler::RectList::const_iterator i = dirtyRects.begin();
for (; i != dirtyRects.end(); ++i) {
const CefRect& rect = *i;
DCHECK(rect.x + rect.width <= view_width_);
DCHECK(rect.y + rect.height <= view_height_);
glPixelStorei(GL_UNPACK_SKIP_PIXELS, rect.x); VERIFY_NO_ERROR;
glPixelStorei(GL_UNPACK_SKIP_ROWS, rect.y); VERIFY_NO_ERROR;
glTexSubImage2D(GL_TEXTURE_2D, 0, rect.x, rect.y, rect.width,
rect.height, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV,
buffer); VERIFY_NO_ERROR;
}
}
} else if (type == PET_POPUP && popup_rect_.width > 0 &&
popup_rect_.height > 0) {
int skip_pixels = 0, x = popup_rect_.x;
int skip_rows = 0, y = popup_rect_.y;
int w = width;
int h = height;
// Adjust the popup to fit inside the view.
if (x < 0) {
skip_pixels = -x;
x = 0;
}
if (y < 0) {
skip_rows = -y;
y = 0;
}
if (x + w > view_width_)
w -= x + w - view_width_;
if (y + h > view_height_)
h -= y + h - view_height_;
// Update the popup rectangle.
glPixelStorei(GL_UNPACK_ROW_LENGTH, width); VERIFY_NO_ERROR;
glPixelStorei(GL_UNPACK_SKIP_PIXELS, skip_pixels); VERIFY_NO_ERROR;
glPixelStorei(GL_UNPACK_SKIP_ROWS, skip_rows); VERIFY_NO_ERROR;
glTexSubImage2D(GL_TEXTURE_2D, 0, x, y, w, h, GL_BGRA,
GL_UNSIGNED_INT_8_8_8_8_REV, buffer); VERIFY_NO_ERROR;
}
// Disable 2D textures.
glDisable(GL_TEXTURE_2D); VERIFY_NO_ERROR;
if (settings_.transparent) {
// Disable alpha blending.
glDisable(GL_BLEND); VERIFY_NO_ERROR;
}
}
void OsrRenderer::SetSpin(float spinX, float spinY) {
spin_x_ = spinX;
spin_y_ = spinY;
}
void OsrRenderer::IncrementSpin(float spinDX, float spinDY) {
spin_x_ -= spinDX;
spin_y_ -= spinDY;
}
} // namespace client
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