bool RenderMethod_PhongPoint_CG::isSupported() const {
return areShadersAvailable();
}
void OpenGLContext::copyTexture (const Rectangle<int>& targetClipArea,
const Rectangle<int>& anchorPosAndTextureSize,
const int contextWidth, const int contextHeight)
{
if (contextWidth <= 0 || contextHeight <= 0)
return;
JUCE_CHECK_OPENGL_ERROR
glBlendFunc (GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
glEnable (GL_BLEND);
#if JUCE_USE_OPENGL_SHADERS
if (areShadersAvailable())
{
struct OverlayShaderProgram : public ReferenceCountedObject
{
OverlayShaderProgram (OpenGLContext& context)
: program (context), builder (program), params (program)
{}
static const OverlayShaderProgram& select (OpenGLContext& context)
{
static const char programValueID[] = "juceGLComponentOverlayShader";
OverlayShaderProgram* program = static_cast <OverlayShaderProgram*> (context.getAssociatedObject (programValueID));
if (program == nullptr)
{
program = new OverlayShaderProgram (context);
context.setAssociatedObject (programValueID, program);
}
program->program.use();
return *program;
}
struct ProgramBuilder
{
ProgramBuilder (OpenGLShaderProgram& prog)
{
prog.addShader ("attribute " JUCE_HIGHP " vec2 position;"
"uniform " JUCE_HIGHP " vec2 screenSize;"
"varying " JUCE_HIGHP " vec2 pixelPos;"
"void main()"
"{"
"pixelPos = position;"
JUCE_HIGHP " vec2 scaled = position / (0.5 * screenSize.xy);"
"gl_Position = vec4 (scaled.x - 1.0, 1.0 - scaled.y, 0, 1.0);"
"}",
GL_VERTEX_SHADER);
prog.addShader ("uniform sampler2D imageTexture;"
"uniform " JUCE_HIGHP " float textureBounds[4];"
"varying " JUCE_HIGHP " vec2 pixelPos;"
"void main()"
"{"
JUCE_HIGHP " vec2 texturePos = (pixelPos - vec2 (textureBounds[0], textureBounds[1]))"
"/ vec2 (textureBounds[2], textureBounds[3]);"
"gl_FragColor = texture2D (imageTexture, vec2 (texturePos.x, 1.0 - texturePos.y));"
"}",
GL_FRAGMENT_SHADER);
prog.link();
}
};
struct Params
{
Params (OpenGLShaderProgram& prog)
: positionAttribute (prog, "position"),
screenSize (prog, "screenSize"),
imageTexture (prog, "imageTexture"),
textureBounds (prog, "textureBounds")
{}
void set (const float targetWidth, const float targetHeight, const Rectangle<float>& bounds) const
{
const GLfloat m[] = { bounds.getX(), bounds.getY(), bounds.getWidth(), bounds.getHeight() };
textureBounds.set (m, 4);
imageTexture.set (0);
screenSize.set (targetWidth, targetHeight);
}
OpenGLShaderProgram::Attribute positionAttribute;
OpenGLShaderProgram::Uniform screenSize, imageTexture, textureBounds;
};
OpenGLShaderProgram program;
ProgramBuilder builder;
Params params;
};
const GLshort left = (GLshort) targetClipArea.getX();
const GLshort top = (GLshort) targetClipArea.getY();
const GLshort right = (GLshort) targetClipArea.getRight();
const GLshort bottom = (GLshort) targetClipArea.getBottom();
const GLshort vertices[] = { left, bottom, right, bottom, left, top, right, top };
const OverlayShaderProgram& program = OverlayShaderProgram::select (*this);
program.params.set ((float) contextWidth, (float) contextHeight, anchorPosAndTextureSize.toFloat());
extensions.glVertexAttribPointer (program.params.positionAttribute.attributeID, 2, GL_SHORT, GL_FALSE, 4, vertices);
extensions.glEnableVertexAttribArray (program.params.positionAttribute.attributeID);
JUCE_CHECK_OPENGL_ERROR
glDrawArrays (GL_TRIANGLE_STRIP, 0, 4);
extensions.glUseProgram (0);
extensions.glDisableVertexAttribArray (program.params.positionAttribute.attributeID);
}
#if JUCE_USE_OPENGL_FIXED_FUNCTION
else
#endif
#endif
#if JUCE_USE_OPENGL_FIXED_FUNCTION
{
glEnable (GL_SCISSOR_TEST);
glScissor (targetClipArea.getX(), contextHeight - targetClipArea.getBottom(),
targetClipArea.getWidth(), targetClipArea.getHeight());
JUCE_CHECK_OPENGL_ERROR
glColor4f (1.0f, 1.0f, 1.0f, 1.0f);
glDisableClientState (GL_COLOR_ARRAY);
glDisableClientState (GL_NORMAL_ARRAY);
glEnableClientState (GL_VERTEX_ARRAY);
glEnableClientState (GL_TEXTURE_COORD_ARRAY);
OpenGLHelpers::prepareFor2D (contextWidth, contextHeight);
JUCE_CHECK_OPENGL_ERROR
const GLfloat textureCoords[] = { 0, 0, 1.0f, 0, 0, 1.0f, 1.0f, 1.0f };
glTexCoordPointer (2, GL_FLOAT, 0, textureCoords);
const GLshort left = (GLshort) anchorPosAndTextureSize.getX();
const GLshort right = (GLshort) anchorPosAndTextureSize.getRight();
const GLshort top = (GLshort) (contextHeight - anchorPosAndTextureSize.getY());
const GLshort bottom = (GLshort) (contextHeight - anchorPosAndTextureSize.getBottom());
const GLshort vertices[] = { left, bottom, right, bottom, left, top, right, top };
glVertexPointer (2, GL_SHORT, 0, vertices);
glDrawArrays (GL_TRIANGLE_STRIP, 0, 4);
glDisable (GL_SCISSOR_TEST);
}
#endif
JUCE_CHECK_OPENGL_ERROR
}
bool RenderMethod_TerrainPhong_CG::isSupported() const {
return areShadersAvailable();
}
bool RenderMethod_Grass_CG::isSupported() const {
return areShadersAvailable();
}