void DisplayOzone::drawBuffer(Buffer *buffer)
{
if (!mDrawing)
{
// get buffer on which to draw window
if (mUnused)
{
mDrawing = mUnused;
mUnused = nullptr;
}
else
{
mDrawing = new Buffer(this, GBM_BO_USE_RENDERING | GBM_BO_USE_SCANOUT,
GBM_FORMAT_ARGB8888, DRM_FORMAT_ARGB8888, DRM_FORMAT_XRGB8888,
true, true); // XXX shouldn't need stencil
if (!mDrawing || !mDrawing->initialize(mWidth, mHeight))
{
return;
}
}
StateManagerGL *sm = getRenderer()->getStateManager();
sm->bindFramebuffer(GL_DRAW_FRAMEBUFFER, mDrawing->getGLFB());
sm->setClearColor(gl::ColorF(0, 0, 0, 1));
sm->setClearDepth(1);
sm->setScissorTestEnabled(false);
sm->setColorMask(true, true, true, true);
sm->setDepthMask(true);
mFunctionsGL->clear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
}
drawWithTexture(buffer);
presentScreen();
}
FramebufferImpl *DXGISwapChainWindowSurfaceWGL::createDefaultFramebuffer(
const gl::Context *context,
const gl::FramebufferState &data)
{
const FunctionsGL *functions = GetFunctionsGL(context);
StateManagerGL *stateManager = GetStateManagerGL(context);
GLuint framebufferID = 0;
functions->genFramebuffers(1, &framebufferID);
stateManager->bindFramebuffer(GL_FRAMEBUFFER, framebufferID);
functions->framebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER,
mColorRenderbufferID);
if (mDepthBufferFormat != GL_NONE)
{
const gl::InternalFormat &depthStencilFormatInfo =
gl::GetSizedInternalFormatInfo(mDepthBufferFormat);
if (depthStencilFormatInfo.depthBits > 0)
{
functions->framebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER,
mDepthRenderbufferID);
}
if (depthStencilFormatInfo.stencilBits > 0)
{
functions->framebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT,
GL_RENDERBUFFER, mDepthRenderbufferID);
}
}
return new FramebufferGL(data, framebufferID, true);
}
void DisplayOzone::drawWithTexture(Buffer *buffer)
{
FunctionsGL *gl = mFunctionsGL;
StateManagerGL *sm = getRenderer()->getStateManager();
if (!mProgram)
{
const GLchar *vertexSource =
"#version 100\n"
"attribute vec3 vertex;\n"
"uniform vec2 center;\n"
"uniform vec2 windowSize;\n"
"uniform vec2 borderSize;\n"
"uniform float depth;\n"
"varying vec3 texCoord;\n"
"void main()\n"
"{\n"
" vec2 pos = vertex.xy * (windowSize + borderSize * vertex.z);\n"
" gl_Position = vec4(center + pos, depth, 1);\n"
" texCoord = vec3(pos / windowSize * vec2(.5, -.5) + vec2(.5, .5), vertex.z);\n"
"}\n";
const GLchar *fragmentSource =
"#version 100\n"
"precision mediump float;\n"
"uniform sampler2D tex;\n"
"varying vec3 texCoord;\n"
"void main()\n"
"{\n"
" if (texCoord.z > 0.)\n"
" {\n"
" float c = abs((texCoord.z * 2.) - 1.);\n"
" gl_FragColor = vec4(c, c, c, 1);\n"
" }\n"
" else\n"
" {\n"
" gl_FragColor = texture2D(tex, texCoord.xy);\n"
" }\n"
"}\n";
mVertexShader = makeShader(GL_VERTEX_SHADER, vertexSource);
mFragmentShader = makeShader(GL_FRAGMENT_SHADER, fragmentSource);
mProgram = gl->createProgram();
gl->attachShader(mProgram, mVertexShader);
gl->attachShader(mProgram, mFragmentShader);
gl->bindAttribLocation(mProgram, 0, "vertex");
gl->linkProgram(mProgram);
GLint linked;
gl->getProgramiv(mProgram, GL_LINK_STATUS, &linked);
ASSERT(linked);
mCenterUniform = gl->getUniformLocation(mProgram, "center");
mWindowSizeUniform = gl->getUniformLocation(mProgram, "windowSize");
mBorderSizeUniform = gl->getUniformLocation(mProgram, "borderSize");
mDepthUniform = gl->getUniformLocation(mProgram, "depth");
GLint texUniform = gl->getUniformLocation(mProgram, "tex");
sm->useProgram(mProgram);
gl->uniform1i(texUniform, 0);
// clang-format off
const GLfloat vertices[] =
{
// window corners, and window border inside corners
1, -1, 0,
-1, -1, 0,
1, 1, 0,
-1, 1, 0,
// window border outside corners
1, -1, 1,
-1, -1, 1,
1, 1, 1,
-1, 1, 1,
};
// clang-format on
gl->genBuffers(1, &mVertexBuffer);
sm->bindBuffer(GL_ARRAY_BUFFER, mVertexBuffer);
gl->bufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
// window border triangle strip
const GLuint borderStrip[] = {5, 0, 4, 2, 6, 3, 7, 1, 5, 0};
gl->genBuffers(1, &mIndexBuffer);
sm->bindBuffer(GL_ELEMENT_ARRAY_BUFFER, mIndexBuffer);
gl->bufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(borderStrip), borderStrip, GL_STATIC_DRAW);
}
else
{
sm->useProgram(mProgram);
sm->bindBuffer(GL_ARRAY_BUFFER, mVertexBuffer);
sm->bindBuffer(GL_ELEMENT_ARRAY_BUFFER, mIndexBuffer);
}
// convert from pixels to "-1 to 1" space
const NativeWindow *n = buffer->getNative();
double x = n->x * 2. / mWidth - 1;
double y = n->y * 2. / mHeight - 1;
double halfw = n->width * 1. / mWidth;
double halfh = n->height * 1. / mHeight;
double borderw = n->borderWidth * 2. / mWidth;
double borderh = n->borderHeight * 2. / mHeight;
gl->uniform2f(mCenterUniform, x + halfw, y + halfh);
gl->uniform2f(mWindowSizeUniform, halfw, halfh);
gl->uniform2f(mBorderSizeUniform, borderw, borderh);
gl->uniform1f(mDepthUniform, n->depth / 1e6);
sm->setBlendEnabled(false);
sm->setCullFaceEnabled(false);
sm->setStencilTestEnabled(false);
sm->setScissorTestEnabled(false);
sm->setDepthTestEnabled(true);
sm->setColorMask(true, true, true, true);
sm->setDepthMask(true);
sm->setDepthRange(0, 1);
sm->setDepthFunc(GL_LESS);
sm->setViewport(gl::Rectangle(0, 0, mWidth, mHeight));
sm->activeTexture(0);
GLuint tex = buffer->getTexture();
sm->bindTexture(GL_TEXTURE_2D, tex);
gl->vertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, 0);
gl->enableVertexAttribArray(0);
sm->bindFramebuffer(GL_DRAW_FRAMEBUFFER, mDrawing->getGLFB());
gl->drawArrays(GL_TRIANGLE_STRIP, 0, 4);
gl->drawElements(GL_TRIANGLE_STRIP, 10, GL_UNSIGNED_INT, 0);
sm->deleteTexture(tex);
}
bool DisplayOzone::Buffer::resize(int32_t width, int32_t height)
{
if (mWidth == width && mHeight == height)
{
return true;
}
reset();
if (width <= 0 || height <= 0)
{
return true;
}
mBO = gbm_bo_create(mDisplay->mGBM, width, height, mGBMFormat, mUseFlags);
if (!mBO)
{
return false;
}
mDMABuf = gbm_bo_get_fd(mBO);
if (mDMABuf < 0)
{
return false;
}
// clang-format off
const EGLint attr[] =
{
EGL_WIDTH, width,
EGL_HEIGHT, height,
EGL_LINUX_DRM_FOURCC_EXT, UnsignedToSigned(mDRMFormat),
EGL_DMA_BUF_PLANE0_FD_EXT, mDMABuf,
EGL_DMA_BUF_PLANE0_PITCH_EXT, UnsignedToSigned(gbm_bo_get_stride(mBO)),
EGL_DMA_BUF_PLANE0_OFFSET_EXT, 0,
EGL_NONE,
};
// clang-format on
mImage = mDisplay->mEGL->createImageKHR(EGL_NO_CONTEXT, EGL_LINUX_DMA_BUF_EXT, nullptr, attr);
if (mImage == EGL_NO_IMAGE_KHR)
{
return false;
}
FunctionsGL *gl = mDisplay->mFunctionsGL;
StateManagerGL *sm = mDisplay->getRenderer()->getStateManager();
gl->genRenderbuffers(1, &mColorBuffer);
sm->bindRenderbuffer(GL_RENDERBUFFER, mColorBuffer);
gl->eglImageTargetRenderbufferStorageOES(GL_RENDERBUFFER, mImage);
sm->bindFramebuffer(GL_FRAMEBUFFER, mGLFB);
gl->framebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0_EXT, GL_RENDERBUFFER,
mColorBuffer);
if (mDepthBits || mStencilBits)
{
gl->genRenderbuffers(1, &mDSBuffer);
sm->bindRenderbuffer(GL_RENDERBUFFER, mDSBuffer);
gl->renderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8_OES, width, height);
}
if (mDepthBits)
{
gl->framebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER,
mDSBuffer);
}
if (mStencilBits)
{
gl->framebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER,
mDSBuffer);
}
mWidth = width;
mHeight = height;
return true;
}