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CRLF to LF
This commit is contained in:
Bart van Strien
@@ -1,328 +1,328 @@
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/**
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* Copyright (c) 2006-2012 LOVE Development Team
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||||
*
|
||||
* This software is provided 'as-is', without any express or implied
|
||||
* warranty. In no event will the authors be held liable for any damages
|
||||
* arising from the use of this software.
|
||||
*
|
||||
* Permission is granted to anyone to use this software for any purpose,
|
||||
* including commercial applications, and to alter it and redistribute it
|
||||
* freely, subject to the following restrictions:
|
||||
*
|
||||
* 1. The origin of this software must not be misrepresented; you must not
|
||||
* claim that you wrote the original software. If you use this software
|
||||
* in a product, an acknowledgment in the product documentation would be
|
||||
* appreciated but is not required.
|
||||
* 2. Altered source versions must be plainly marked as such, and must not be
|
||||
* misrepresented as being the original software.
|
||||
* 3. This notice may not be removed or altered from any source distribution.
|
||||
**/
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||||
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||||
#include "PixelEffect.h"
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#include "GLee.h"
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||||
|
||||
namespace
|
||||
{
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// temporarily attaches a shader program (for setting uniforms, etc)
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||||
// reattaches the originally active program when destroyed
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||||
struct TemporaryAttacher
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||||
{
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||||
TemporaryAttacher(love::graphics::opengl::PixelEffect *sp) : s(sp)
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||||
{
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glGetIntegerv(GL_CURRENT_PROGRAM, &activeProgram);
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s->attach();
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||||
}
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~TemporaryAttacher()
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{
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glUseProgram(activeProgram);
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}
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love::graphics::opengl::PixelEffect *s;
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||||
GLint activeProgram;
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||||
};
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} // anonymous namespace
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namespace love
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{
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||||
namespace graphics
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||||
{
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||||
namespace opengl
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||||
{
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PixelEffect *PixelEffect::current = NULL;
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||||
std::map<std::string, GLint> PixelEffect::_texture_unit_pool;
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||||
GLint PixelEffect::_current_texture_unit = 0;
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||||
GLint PixelEffect::_max_texture_units = 0;
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||||
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||||
GLint PixelEffect::getTextureUnit(const std::string &name)
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||||
{
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std::map<std::string, GLint>::const_iterator it = _texture_unit_pool.find(name);
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||||
if (it != _texture_unit_pool.end())
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return it->second;
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||||
|
||||
if (++_current_texture_unit >= _max_texture_units)
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throw love::Exception("No more texture units available");
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_texture_unit_pool[name] = _current_texture_unit;
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return _current_texture_unit;
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}
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||||
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||||
PixelEffect::PixelEffect(const std::string &code)
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: _program(0)
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, _code(code)
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||||
{
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glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &_max_texture_units);
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loadVolatile();
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}
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||||
bool PixelEffect::loadVolatile()
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||||
{
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_program = glCreateProgram();
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// should only fail if this is called between a glBegin()/glEnd() pair
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if (_program == 0)
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throw love::Exception("Cannot create shader program object.");
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||||
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||||
GLuint shader = glCreateShader(GL_FRAGMENT_SHADER);
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// should only fail if this is called between a glBegin()/glEnd() pair
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if (shader == 0)
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||||
{
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glDeleteProgram(_program);
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throw love::Exception("Cannot create shader object.");
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}
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// compile fragment shader code
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const char *src = _code.c_str();
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GLint strlen = _code.length();
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glShaderSource(shader, 1, (const GLchar **)&src, &strlen);
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glCompileShader(shader);
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GLint compile_ok;
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||||
glGetShaderiv(shader, GL_COMPILE_STATUS, &compile_ok);
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||||
if (GL_FALSE == compile_ok)
|
||||
{
|
||||
// get compiler error
|
||||
glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &strlen);
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||||
char *error_str = new char[strlen];
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||||
glGetShaderInfoLog(shader, strlen, NULL, error_str);
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||||
std::string tmp(error_str);
|
||||
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||||
// cleanup before throw
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||||
delete[] error_str;
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||||
glDeleteShader(shader);
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glDeleteProgram(_program);
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||||
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||||
// XXX: errorlog may contain escape sequences.
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||||
throw love::Exception("Cannot compile shader:\n%s", tmp.c_str());
|
||||
}
|
||||
|
||||
// link fragment shader
|
||||
GLint link_ok;
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||||
glAttachShader(_program, shader);
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glLinkProgram(_program);
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glGetProgramiv(_program, GL_LINK_STATUS, &link_ok);
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||||
if (GL_FALSE == link_ok)
|
||||
{
|
||||
// this should not happen if compiling is ok, but one can never be too careful
|
||||
// get linker error
|
||||
std::string tmp(getWarnings());
|
||||
|
||||
// cleanup before throw
|
||||
glDeleteShader(shader);
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||||
glDeleteProgram(_program);
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||||
throw love::Exception("Cannot compile shader:\n%s", tmp.c_str());
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}
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glDeleteShader(shader);
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return true;
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}
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PixelEffect::~PixelEffect()
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{
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unloadVolatile();
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}
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void PixelEffect::unloadVolatile()
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{
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glDeleteProgram(_program);
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}
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||||
std::string PixelEffect::getGLSLVersion()
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||||
{
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||||
// GL_SHADING_LANGUAGE_VERSION is not available in OpenGL < 2.1.
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||||
// Be very pessimistic about the GLSL version in that case.
|
||||
if (!GLEE_VERSION_2_1)
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||||
return "0.0";
|
||||
|
||||
// the version string always begins with a version number of the format
|
||||
// major_number.minor_number
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||||
// or
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||||
// major_number.minor_number.release_number
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std::string versionString((const char *)glGetString(GL_SHADING_LANGUAGE_VERSION));
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size_t minorEndPos = versionString.find(" ");
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return versionString.substr(0, minorEndPos);
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}
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||||
|
||||
|
||||
bool PixelEffect::isSupported()
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{
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return GLEE_VERSION_2_0 && GLEE_ARB_shader_objects && GLEE_ARB_fragment_shader && getGLSLVersion() >= "1.2";
|
||||
}
|
||||
|
||||
std::string PixelEffect::getWarnings() const
|
||||
{
|
||||
GLint strlen, nullpos;
|
||||
glGetProgramiv(_program, GL_INFO_LOG_LENGTH, &strlen);
|
||||
char *temp_str = new char[strlen+1];
|
||||
// be extra sure that the error string will be 0-terminated
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memset(temp_str, '\0', strlen+1);
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||||
glGetProgramInfoLog(_program, strlen, &nullpos, temp_str);
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||||
temp_str[nullpos] = '\0';
|
||||
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||||
std::string warnings(temp_str);
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||||
delete[] temp_str;
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||||
return warnings;
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||||
}
|
||||
|
||||
void PixelEffect::attach()
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||||
{
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glUseProgram(_program);
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current = this;
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||||
}
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||||
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void PixelEffect::detach()
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{
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glUseProgram(0);
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current = NULL;
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}
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void PixelEffect::sendFloat(const std::string &name, int size, const GLfloat *vec, int count)
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||||
{
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TemporaryAttacher attacher(this);
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GLint location = getUniformLocation(name);
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||||
|
||||
if (size < 1 || size > 4)
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||||
{
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||||
throw love::Exception("Invalid variable size: %d (expected 1-4).", size);
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||||
}
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||||
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||||
switch (size)
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||||
{
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case 4:
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glUniform4fv(location, count, vec);
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break;
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case 3:
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glUniform3fv(location, count, vec);
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break;
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case 2:
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glUniform2fv(location, count, vec);
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break;
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case 1:
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default:
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glUniform1fv(location, count, vec);
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||||
break;
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||||
}
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||||
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||||
// throw error if needed
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||||
checkSetUniformError();
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||||
}
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||||
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||||
void PixelEffect::sendMatrix(const std::string &name, int size, const GLfloat *m, int count)
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||||
{
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TemporaryAttacher attacher(this);
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GLint location = getUniformLocation(name);
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||||
|
||||
if (size < 2 || size > 4)
|
||||
{
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throw love::Exception("Invalid matrix size: %dx%d "
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"(can only set 2x2, 3x3 or 4x4 matrices).", size,size);
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}
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||||
|
||||
switch (size)
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||||
{
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case 4:
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glUniformMatrix4fv(location, count, GL_FALSE, m);
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break;
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||||
case 3:
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glUniformMatrix3fv(location, count, GL_FALSE, m);
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break;
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case 2:
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default:
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glUniformMatrix2fv(location, count, GL_FALSE, m);
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break;
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||||
}
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||||
|
||||
// throw error if needed
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checkSetUniformError();
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}
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||||
|
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void PixelEffect::sendImage(const std::string &name, const Image &image)
|
||||
{
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GLint texture_unit = getTextureUnit(name);
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|
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TemporaryAttacher attacher(this);
|
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GLint location = getUniformLocation(name);
|
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|
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glActiveTexture(GL_TEXTURE0 + texture_unit);
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bindTexture(image.getTextureName(), true); // guarantee it gets bound
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glUniform1i(location, texture_unit);
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||||
|
||||
// reset texture unit
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||||
glActiveTexture(GL_TEXTURE0);
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|
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// throw error if needed
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checkSetUniformError();
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}
|
||||
|
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void PixelEffect::sendCanvas(const std::string &name, const Canvas &canvas)
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||||
{
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GLint texture_unit = getTextureUnit(name);
|
||||
|
||||
TemporaryAttacher attacher(this);
|
||||
GLint location = getUniformLocation(name);
|
||||
|
||||
glActiveTexture(GL_TEXTURE0 + texture_unit);
|
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bindTexture(canvas.getTextureName(), true); // guarantee it gets bound
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glUniform1i(location, texture_unit);
|
||||
|
||||
// reset texture unit
|
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glActiveTexture(GL_TEXTURE0);
|
||||
|
||||
// throw error if needed
|
||||
checkSetUniformError();
|
||||
}
|
||||
|
||||
GLint PixelEffect::getUniformLocation(const std::string &name)
|
||||
{
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std::map<std::string, GLint>::const_iterator it = _uniforms.find(name);
|
||||
if (it != _uniforms.end())
|
||||
return it->second;
|
||||
|
||||
GLint location = glGetUniformLocation(_program, name.c_str());
|
||||
if (location == -1)
|
||||
{
|
||||
throw love::Exception(
|
||||
"Cannot get location of shader variable `%s'.\n"
|
||||
"A common error is to define but not use the variable.", name.c_str());
|
||||
}
|
||||
|
||||
_uniforms[name] = location;
|
||||
return location;
|
||||
}
|
||||
|
||||
void PixelEffect::checkSetUniformError()
|
||||
{
|
||||
GLenum error_code = glGetError();
|
||||
if (GL_INVALID_OPERATION == error_code)
|
||||
{
|
||||
throw love::Exception(
|
||||
"Invalid operation:\n"
|
||||
"- Trying to send the wrong value type to shader variable, or\n"
|
||||
"- Trying to send array values with wrong dimension, or\n"
|
||||
"- Invalid variable name.");
|
||||
}
|
||||
}
|
||||
|
||||
} // opengl
|
||||
} // graphics
|
||||
} // love
|
||||
/**
|
||||
* Copyright (c) 2006-2012 LOVE Development Team
|
||||
*
|
||||
* This software is provided 'as-is', without any express or implied
|
||||
* warranty. In no event will the authors be held liable for any damages
|
||||
* arising from the use of this software.
|
||||
*
|
||||
* Permission is granted to anyone to use this software for any purpose,
|
||||
* including commercial applications, and to alter it and redistribute it
|
||||
* freely, subject to the following restrictions:
|
||||
*
|
||||
* 1. The origin of this software must not be misrepresented; you must not
|
||||
* claim that you wrote the original software. If you use this software
|
||||
* in a product, an acknowledgment in the product documentation would be
|
||||
* appreciated but is not required.
|
||||
* 2. Altered source versions must be plainly marked as such, and must not be
|
||||
* misrepresented as being the original software.
|
||||
* 3. This notice may not be removed or altered from any source distribution.
|
||||
**/
|
||||
|
||||
#include "PixelEffect.h"
|
||||
#include "GLee.h"
|
||||
|
||||
namespace
|
||||
{
|
||||
// temporarily attaches a shader program (for setting uniforms, etc)
|
||||
// reattaches the originally active program when destroyed
|
||||
struct TemporaryAttacher
|
||||
{
|
||||
TemporaryAttacher(love::graphics::opengl::PixelEffect *sp) : s(sp)
|
||||
{
|
||||
glGetIntegerv(GL_CURRENT_PROGRAM, &activeProgram);
|
||||
s->attach();
|
||||
}
|
||||
~TemporaryAttacher()
|
||||
{
|
||||
glUseProgram(activeProgram);
|
||||
}
|
||||
love::graphics::opengl::PixelEffect *s;
|
||||
GLint activeProgram;
|
||||
};
|
||||
} // anonymous namespace
|
||||
|
||||
namespace love
|
||||
{
|
||||
namespace graphics
|
||||
{
|
||||
namespace opengl
|
||||
{
|
||||
|
||||
PixelEffect *PixelEffect::current = NULL;
|
||||
|
||||
std::map<std::string, GLint> PixelEffect::_texture_unit_pool;
|
||||
GLint PixelEffect::_current_texture_unit = 0;
|
||||
GLint PixelEffect::_max_texture_units = 0;
|
||||
|
||||
GLint PixelEffect::getTextureUnit(const std::string &name)
|
||||
{
|
||||
std::map<std::string, GLint>::const_iterator it = _texture_unit_pool.find(name);
|
||||
|
||||
if (it != _texture_unit_pool.end())
|
||||
return it->second;
|
||||
|
||||
if (++_current_texture_unit >= _max_texture_units)
|
||||
throw love::Exception("No more texture units available");
|
||||
|
||||
_texture_unit_pool[name] = _current_texture_unit;
|
||||
return _current_texture_unit;
|
||||
}
|
||||
|
||||
PixelEffect::PixelEffect(const std::string &code)
|
||||
: _program(0)
|
||||
, _code(code)
|
||||
{
|
||||
glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &_max_texture_units);
|
||||
loadVolatile();
|
||||
}
|
||||
|
||||
bool PixelEffect::loadVolatile()
|
||||
{
|
||||
_program = glCreateProgram();
|
||||
// should only fail if this is called between a glBegin()/glEnd() pair
|
||||
if (_program == 0)
|
||||
throw love::Exception("Cannot create shader program object.");
|
||||
|
||||
GLuint shader = glCreateShader(GL_FRAGMENT_SHADER);
|
||||
// should only fail if this is called between a glBegin()/glEnd() pair
|
||||
if (shader == 0)
|
||||
{
|
||||
glDeleteProgram(_program);
|
||||
throw love::Exception("Cannot create shader object.");
|
||||
}
|
||||
|
||||
// compile fragment shader code
|
||||
const char *src = _code.c_str();
|
||||
GLint strlen = _code.length();
|
||||
glShaderSource(shader, 1, (const GLchar **)&src, &strlen);
|
||||
glCompileShader(shader);
|
||||
|
||||
GLint compile_ok;
|
||||
glGetShaderiv(shader, GL_COMPILE_STATUS, &compile_ok);
|
||||
if (GL_FALSE == compile_ok)
|
||||
{
|
||||
// get compiler error
|
||||
glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &strlen);
|
||||
char *error_str = new char[strlen];
|
||||
glGetShaderInfoLog(shader, strlen, NULL, error_str);
|
||||
std::string tmp(error_str);
|
||||
|
||||
// cleanup before throw
|
||||
delete[] error_str;
|
||||
glDeleteShader(shader);
|
||||
glDeleteProgram(_program);
|
||||
|
||||
// XXX: errorlog may contain escape sequences.
|
||||
throw love::Exception("Cannot compile shader:\n%s", tmp.c_str());
|
||||
}
|
||||
|
||||
// link fragment shader
|
||||
GLint link_ok;
|
||||
glAttachShader(_program, shader);
|
||||
glLinkProgram(_program);
|
||||
glGetProgramiv(_program, GL_LINK_STATUS, &link_ok);
|
||||
if (GL_FALSE == link_ok)
|
||||
{
|
||||
// this should not happen if compiling is ok, but one can never be too careful
|
||||
// get linker error
|
||||
std::string tmp(getWarnings());
|
||||
|
||||
// cleanup before throw
|
||||
glDeleteShader(shader);
|
||||
glDeleteProgram(_program);
|
||||
throw love::Exception("Cannot compile shader:\n%s", tmp.c_str());
|
||||
}
|
||||
|
||||
glDeleteShader(shader);
|
||||
return true;
|
||||
}
|
||||
|
||||
PixelEffect::~PixelEffect()
|
||||
{
|
||||
unloadVolatile();
|
||||
}
|
||||
|
||||
void PixelEffect::unloadVolatile()
|
||||
{
|
||||
glDeleteProgram(_program);
|
||||
}
|
||||
|
||||
std::string PixelEffect::getGLSLVersion()
|
||||
{
|
||||
// GL_SHADING_LANGUAGE_VERSION is not available in OpenGL < 2.1.
|
||||
// Be very pessimistic about the GLSL version in that case.
|
||||
if (!GLEE_VERSION_2_1)
|
||||
return "0.0";
|
||||
|
||||
// the version string always begins with a version number of the format
|
||||
// major_number.minor_number
|
||||
// or
|
||||
// major_number.minor_number.release_number
|
||||
std::string versionString((const char *)glGetString(GL_SHADING_LANGUAGE_VERSION));
|
||||
size_t minorEndPos = versionString.find(" ");
|
||||
return versionString.substr(0, minorEndPos);
|
||||
}
|
||||
|
||||
|
||||
bool PixelEffect::isSupported()
|
||||
{
|
||||
return GLEE_VERSION_2_0 && GLEE_ARB_shader_objects && GLEE_ARB_fragment_shader && getGLSLVersion() >= "1.2";
|
||||
}
|
||||
|
||||
std::string PixelEffect::getWarnings() const
|
||||
{
|
||||
GLint strlen, nullpos;
|
||||
glGetProgramiv(_program, GL_INFO_LOG_LENGTH, &strlen);
|
||||
char *temp_str = new char[strlen+1];
|
||||
// be extra sure that the error string will be 0-terminated
|
||||
memset(temp_str, '\0', strlen+1);
|
||||
glGetProgramInfoLog(_program, strlen, &nullpos, temp_str);
|
||||
temp_str[nullpos] = '\0';
|
||||
|
||||
std::string warnings(temp_str);
|
||||
delete[] temp_str;
|
||||
return warnings;
|
||||
}
|
||||
|
||||
void PixelEffect::attach()
|
||||
{
|
||||
glUseProgram(_program);
|
||||
current = this;
|
||||
}
|
||||
|
||||
void PixelEffect::detach()
|
||||
{
|
||||
glUseProgram(0);
|
||||
current = NULL;
|
||||
}
|
||||
|
||||
void PixelEffect::sendFloat(const std::string &name, int size, const GLfloat *vec, int count)
|
||||
{
|
||||
TemporaryAttacher attacher(this);
|
||||
GLint location = getUniformLocation(name);
|
||||
|
||||
if (size < 1 || size > 4)
|
||||
{
|
||||
throw love::Exception("Invalid variable size: %d (expected 1-4).", size);
|
||||
}
|
||||
|
||||
switch (size)
|
||||
{
|
||||
case 4:
|
||||
glUniform4fv(location, count, vec);
|
||||
break;
|
||||
case 3:
|
||||
glUniform3fv(location, count, vec);
|
||||
break;
|
||||
case 2:
|
||||
glUniform2fv(location, count, vec);
|
||||
break;
|
||||
case 1:
|
||||
default:
|
||||
glUniform1fv(location, count, vec);
|
||||
break;
|
||||
}
|
||||
|
||||
// throw error if needed
|
||||
checkSetUniformError();
|
||||
}
|
||||
|
||||
void PixelEffect::sendMatrix(const std::string &name, int size, const GLfloat *m, int count)
|
||||
{
|
||||
TemporaryAttacher attacher(this);
|
||||
GLint location = getUniformLocation(name);
|
||||
|
||||
if (size < 2 || size > 4)
|
||||
{
|
||||
throw love::Exception("Invalid matrix size: %dx%d "
|
||||
"(can only set 2x2, 3x3 or 4x4 matrices).", size,size);
|
||||
}
|
||||
|
||||
switch (size)
|
||||
{
|
||||
case 4:
|
||||
glUniformMatrix4fv(location, count, GL_FALSE, m);
|
||||
break;
|
||||
case 3:
|
||||
glUniformMatrix3fv(location, count, GL_FALSE, m);
|
||||
break;
|
||||
case 2:
|
||||
default:
|
||||
glUniformMatrix2fv(location, count, GL_FALSE, m);
|
||||
break;
|
||||
}
|
||||
|
||||
// throw error if needed
|
||||
checkSetUniformError();
|
||||
}
|
||||
|
||||
void PixelEffect::sendImage(const std::string &name, const Image &image)
|
||||
{
|
||||
GLint texture_unit = getTextureUnit(name);
|
||||
|
||||
TemporaryAttacher attacher(this);
|
||||
GLint location = getUniformLocation(name);
|
||||
|
||||
glActiveTexture(GL_TEXTURE0 + texture_unit);
|
||||
bindTexture(image.getTextureName(), true); // guarantee it gets bound
|
||||
glUniform1i(location, texture_unit);
|
||||
|
||||
// reset texture unit
|
||||
glActiveTexture(GL_TEXTURE0);
|
||||
|
||||
// throw error if needed
|
||||
checkSetUniformError();
|
||||
}
|
||||
|
||||
void PixelEffect::sendCanvas(const std::string &name, const Canvas &canvas)
|
||||
{
|
||||
GLint texture_unit = getTextureUnit(name);
|
||||
|
||||
TemporaryAttacher attacher(this);
|
||||
GLint location = getUniformLocation(name);
|
||||
|
||||
glActiveTexture(GL_TEXTURE0 + texture_unit);
|
||||
bindTexture(canvas.getTextureName(), true); // guarantee it gets bound
|
||||
glUniform1i(location, texture_unit);
|
||||
|
||||
// reset texture unit
|
||||
glActiveTexture(GL_TEXTURE0);
|
||||
|
||||
// throw error if needed
|
||||
checkSetUniformError();
|
||||
}
|
||||
|
||||
GLint PixelEffect::getUniformLocation(const std::string &name)
|
||||
{
|
||||
std::map<std::string, GLint>::const_iterator it = _uniforms.find(name);
|
||||
if (it != _uniforms.end())
|
||||
return it->second;
|
||||
|
||||
GLint location = glGetUniformLocation(_program, name.c_str());
|
||||
if (location == -1)
|
||||
{
|
||||
throw love::Exception(
|
||||
"Cannot get location of shader variable `%s'.\n"
|
||||
"A common error is to define but not use the variable.", name.c_str());
|
||||
}
|
||||
|
||||
_uniforms[name] = location;
|
||||
return location;
|
||||
}
|
||||
|
||||
void PixelEffect::checkSetUniformError()
|
||||
{
|
||||
GLenum error_code = glGetError();
|
||||
if (GL_INVALID_OPERATION == error_code)
|
||||
{
|
||||
throw love::Exception(
|
||||
"Invalid operation:\n"
|
||||
"- Trying to send the wrong value type to shader variable, or\n"
|
||||
"- Trying to send array values with wrong dimension, or\n"
|
||||
"- Invalid variable name.");
|
||||
}
|
||||
}
|
||||
|
||||
} // opengl
|
||||
} // graphics
|
||||
} // love
|
||||
|
||||
Reference in New Issue
Block a user