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/**************************************************************************
*
* Copyright 2011 Jose Fonseca
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
**************************************************************************/
#pragma once
#include <stdint.h>
#include "glimports.hpp"
#include "glproc.hpp"
#include "glfeatures.hpp"
#include "image.hpp"
class StateWriter;
namespace glstate {
struct Context : public glfeatures::Features
{
inline Context(void)
{
load();
}
};
class PixelPackState
{
public:
PixelPackState(const Context & context);
~PixelPackState();
private:
bool desktop;
bool texture_3d;
bool pixel_buffer_object;
// Pack state
GLint pack_alignment;
GLint pack_image_height;
GLint pack_lsb_first;
GLint pack_row_length;
GLint pack_skip_images;
GLint pack_skip_pixels;
GLint pack_skip_rows;
GLint pack_swap_bytes;
GLint pixel_pack_buffer_binding;
};
static inline void
flushErrors(void) {
while (glGetError() != GL_NO_ERROR) {
}
}
const char *
formatToString(GLenum internalFormat);
struct InternalFormatDesc
{
GLenum internalFormat;
/* The external format/type that matches the internalFormat exactly, or GL_NONE. */
GLenum format;
GLenum type;
/* The appropriate read type for dumping. */
GLenum readType;
};
const InternalFormatDesc &
getInternalFormatDesc(GLenum internalFormat);
void
chooseReadBackFormat(const InternalFormatDesc &formatDesc, GLenum &format, GLenum &type);
void
getImageFormat(GLenum format, GLenum type,
GLuint &channels, image::ChannelType &channelType);
// Abstract base class for pixel format conversion
class PixelFormat
{
public:
virtual ~PixelFormat() {}
// Size in bytes
virtual size_t
size(void) const = 0;
// Unpack a span of pixels
virtual void
unpackSpan(const uint8_t *inSpan, float *outSpan, unsigned width) const = 0;
};
const PixelFormat *
getPixelFormat(GLenum internalFormat);
/**
* Helper class to temporarily bind a buffer to the specified target until
* control leaves the declaration scope.
*/
class BufferBinding
{
private:
GLenum target;
GLuint buffer;
GLuint prevBuffer;
public:
BufferBinding(GLenum _target, GLuint _buffer);
~BufferBinding();
};
/**
* Helper class to temporarily map a buffer (if necessary), and unmap when
* destroyed.
*/
class BufferMapping
{
GLuint target;
GLuint buffer;
GLvoid *map_pointer;
bool unmap;
public:
BufferMapping();
GLvoid *
map(GLenum _target, GLuint _buffer);
~BufferMapping();
};
bool
isGeometryShaderBound(Context &context);
void dumpBoolean(StateWriter &writer, GLboolean value);
void dumpEnum(StateWriter &writer, GLenum pname);
char *
getObjectLabel(Context &context, GLenum identifier, GLuint name);
void dumpObjectLabel(StateWriter &writer, Context &context, GLenum identifier, GLuint name, const char *member);
void dumpParameters(StateWriter &writer, Context &context);
void dumpShadersUniforms(StateWriter &writer, Context &context);
void dumpTextures(StateWriter &writer, Context &context);
void dumpFramebuffer(StateWriter &writer, Context &context);
} /* namespace glstate */
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