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Add: [Win32] Video driver that uses OpenGL to transfer the video buffer to the screen.

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This commit is contained in:
Michael Lutz 2021-01-16 16:43:04 +01:00
parent af4d32357c
commit ef478ade64
12 changed files with 13670 additions and 3 deletions
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5
CMakeLists.txt
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@ -135,6 +135,10 @@ if(NOT WIN32)
endif()
endif()
if(NOT EMSCRIPTEN)
find_package(OpenGL COMPONENTS OpenGL)
endif()
if(MSVC)
find_package(Editbin REQUIRED)
endif()
@ -245,6 +249,7 @@ if(NOT OPTION_DEDICATED)
link_package(Fontconfig TARGET Fontconfig::Fontconfig)
link_package(ICU_lx)
link_package(ICU_i18n)
link_package(OpenGL TARGET OpenGL::GL)
endif()
if(APPLE)

1
src/3rdparty/CMakeLists.txt vendored
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@ -1,3 +1,4 @@
add_subdirectory(md5)
add_subdirectory(squirrel)
add_subdirectory(opengl)
add_subdirectory(os2)

5
src/3rdparty/opengl/CMakeLists.txt vendored Normal file
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@ -0,0 +1,5 @@
add_files(
khrplatform.h
glext.h
CONDITION OPENGL_FOUND
)

12861
src/3rdparty/opengl/glext.h vendored Normal file
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File diff suppressed because it is too large Load Diff

290
src/3rdparty/opengl/khrplatform.h vendored Normal file
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@ -0,0 +1,290 @@
#ifndef __khrplatform_h_
#define __khrplatform_h_
/*
** Copyright (c) 2008-2018 The Khronos Group Inc.
**
** Permission is hereby granted, free of charge, to any person obtaining a
** copy of this software and/or associated documentation files (the
** "Materials"), to deal in the Materials without restriction, including
** without limitation the rights to use, copy, modify, merge, publish,
** distribute, sublicense, and/or sell copies of the Materials, and to
** permit persons to whom the Materials are 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 Materials.
**
** THE MATERIALS ARE 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
** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
*/
/* Khronos platform-specific types and definitions.
*
* The master copy of khrplatform.h is maintained in the Khronos EGL
* Registry repository at https://github.com/KhronosGroup/EGL-Registry
* The last semantic modification to khrplatform.h was at commit ID:
* 67a3e0864c2d75ea5287b9f3d2eb74a745936692
*
* Adopters may modify this file to suit their platform. Adopters are
* encouraged to submit platform specific modifications to the Khronos
* group so that they can be included in future versions of this file.
* Please submit changes by filing pull requests or issues on
* the EGL Registry repository linked above.
*
*
* See the Implementer's Guidelines for information about where this file
* should be located on your system and for more details of its use:
* http://www.khronos.org/registry/implementers_guide.pdf
*
* This file should be included as
* #include <KHR/khrplatform.h>
* by Khronos client API header files that use its types and defines.
*
* The types in khrplatform.h should only be used to define API-specific types.
*
* Types defined in khrplatform.h:
* khronos_int8_t signed 8 bit
* khronos_uint8_t unsigned 8 bit
* khronos_int16_t signed 16 bit
* khronos_uint16_t unsigned 16 bit
* khronos_int32_t signed 32 bit
* khronos_uint32_t unsigned 32 bit
* khronos_int64_t signed 64 bit
* khronos_uint64_t unsigned 64 bit
* khronos_intptr_t signed same number of bits as a pointer
* khronos_uintptr_t unsigned same number of bits as a pointer
* khronos_ssize_t signed size
* khronos_usize_t unsigned size
* khronos_float_t signed 32 bit floating point
* khronos_time_ns_t unsigned 64 bit time in nanoseconds
* khronos_utime_nanoseconds_t unsigned time interval or absolute time in
* nanoseconds
* khronos_stime_nanoseconds_t signed time interval in nanoseconds
* khronos_boolean_enum_t enumerated boolean type. This should
* only be used as a base type when a client API's boolean type is
* an enum. Client APIs which use an integer or other type for
* booleans cannot use this as the base type for their boolean.
*
* Tokens defined in khrplatform.h:
*
* KHRONOS_FALSE, KHRONOS_TRUE Enumerated boolean false/true values.
*
* KHRONOS_SUPPORT_INT64 is 1 if 64 bit integers are supported; otherwise 0.
* KHRONOS_SUPPORT_FLOAT is 1 if floats are supported; otherwise 0.
*
* Calling convention macros defined in this file:
* KHRONOS_APICALL
* KHRONOS_APIENTRY
* KHRONOS_APIATTRIBUTES
*
* These may be used in function prototypes as:
*
* KHRONOS_APICALL void KHRONOS_APIENTRY funcname(
* int arg1,
* int arg2) KHRONOS_APIATTRIBUTES;
*/
#if defined(__SCITECH_SNAP__) && !defined(KHRONOS_STATIC)
# define KHRONOS_STATIC 1
#endif
/*-------------------------------------------------------------------------
* Definition of KHRONOS_APICALL
*-------------------------------------------------------------------------
* This precedes the return type of the function in the function prototype.
*/
#if defined(KHRONOS_STATIC)
/* If the preprocessor constant KHRONOS_STATIC is defined, make the
* header compatible with static linking. */
# define KHRONOS_APICALL
#elif defined(_WIN32)
# define KHRONOS_APICALL __declspec(dllimport)
#elif defined (__SYMBIAN32__)
# define KHRONOS_APICALL IMPORT_C
#elif defined(__ANDROID__)
# define KHRONOS_APICALL __attribute__((visibility("default")))
#else
# define KHRONOS_APICALL
#endif
/*-------------------------------------------------------------------------
* Definition of KHRONOS_APIENTRY
*-------------------------------------------------------------------------
* This follows the return type of the function and precedes the function
* name in the function prototype.
*/
#if defined(_WIN32) && !defined(_WIN32_WCE) && !defined(__SCITECH_SNAP__)
/* Win32 but not WinCE */
# define KHRONOS_APIENTRY __stdcall
#else
# define KHRONOS_APIENTRY
#endif
/*-------------------------------------------------------------------------
* Definition of KHRONOS_APIATTRIBUTES
*-------------------------------------------------------------------------
* This follows the closing parenthesis of the function prototype arguments.
*/
#if defined (__ARMCC_2__)
#define KHRONOS_APIATTRIBUTES __softfp
#else
#define KHRONOS_APIATTRIBUTES
#endif
/*-------------------------------------------------------------------------
* basic type definitions
*-----------------------------------------------------------------------*/
#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || defined(__GNUC__) || defined(__SCO__) || defined(__USLC__)
/*
* Using <stdint.h>
*/
#include <stdint.h>
typedef int32_t khronos_int32_t;
typedef uint32_t khronos_uint32_t;
typedef int64_t khronos_int64_t;
typedef uint64_t khronos_uint64_t;
#define KHRONOS_SUPPORT_INT64 1
#define KHRONOS_SUPPORT_FLOAT 1
#elif defined(__VMS ) || defined(__sgi)
/*
* Using <inttypes.h>
*/
#include <inttypes.h>
typedef int32_t khronos_int32_t;
typedef uint32_t khronos_uint32_t;
typedef int64_t khronos_int64_t;
typedef uint64_t khronos_uint64_t;
#define KHRONOS_SUPPORT_INT64 1
#define KHRONOS_SUPPORT_FLOAT 1
#elif defined(_WIN32) && !defined(__SCITECH_SNAP__)
/*
* Win32
*/
typedef __int32 khronos_int32_t;
typedef unsigned __int32 khronos_uint32_t;
typedef __int64 khronos_int64_t;
typedef unsigned __int64 khronos_uint64_t;
#define KHRONOS_SUPPORT_INT64 1
#define KHRONOS_SUPPORT_FLOAT 1
#elif defined(__sun__) || defined(__digital__)
/*
* Sun or Digital
*/
typedef int khronos_int32_t;
typedef unsigned int khronos_uint32_t;
#if defined(__arch64__) || defined(_LP64)
typedef long int khronos_int64_t;
typedef unsigned long int khronos_uint64_t;
#else
typedef long long int khronos_int64_t;
typedef unsigned long long int khronos_uint64_t;
#endif /* __arch64__ */
#define KHRONOS_SUPPORT_INT64 1
#define KHRONOS_SUPPORT_FLOAT 1
#elif 0
/*
* Hypothetical platform with no float or int64 support
*/
typedef int khronos_int32_t;
typedef unsigned int khronos_uint32_t;
#define KHRONOS_SUPPORT_INT64 0
#define KHRONOS_SUPPORT_FLOAT 0
#else
/*
* Generic fallback
*/
#include <stdint.h>
typedef int32_t khronos_int32_t;
typedef uint32_t khronos_uint32_t;
typedef int64_t khronos_int64_t;
typedef uint64_t khronos_uint64_t;
#define KHRONOS_SUPPORT_INT64 1
#define KHRONOS_SUPPORT_FLOAT 1
#endif
/*
* Types that are (so far) the same on all platforms
*/
typedef signed char khronos_int8_t;
typedef unsigned char khronos_uint8_t;
typedef signed short int khronos_int16_t;
typedef unsigned short int khronos_uint16_t;
/*
* Types that differ between LLP64 and LP64 architectures - in LLP64,
* pointers are 64 bits, but 'long' is still 32 bits. Win64 appears
* to be the only LLP64 architecture in current use.
*/
#ifdef _WIN64
typedef signed long long int khronos_intptr_t;
typedef unsigned long long int khronos_uintptr_t;
typedef signed long long int khronos_ssize_t;
typedef unsigned long long int khronos_usize_t;
#else
typedef signed long int khronos_intptr_t;
typedef unsigned long int khronos_uintptr_t;
typedef signed long int khronos_ssize_t;
typedef unsigned long int khronos_usize_t;
#endif
#if KHRONOS_SUPPORT_FLOAT
/*
* Float type
*/
typedef float khronos_float_t;
#endif
#if KHRONOS_SUPPORT_INT64
/* Time types
*
* These types can be used to represent a time interval in nanoseconds or
* an absolute Unadjusted System Time. Unadjusted System Time is the number
* of nanoseconds since some arbitrary system event (e.g. since the last
* time the system booted). The Unadjusted System Time is an unsigned
* 64 bit value that wraps back to 0 every 584 years. Time intervals
* may be either signed or unsigned.
*/
typedef khronos_uint64_t khronos_utime_nanoseconds_t;
typedef khronos_int64_t khronos_stime_nanoseconds_t;
#endif
/*
* Dummy value used to pad enum types to 32 bits.
*/
#ifndef KHRONOS_MAX_ENUM
#define KHRONOS_MAX_ENUM 0x7FFFFFFF
#endif
/*
* Enumerated boolean type
*
* Values other than zero should be considered to be true. Therefore
* comparisons should not be made against KHRONOS_TRUE.
*/
typedef enum {
KHRONOS_FALSE = 0,
KHRONOS_TRUE = 1,
KHRONOS_BOOLEAN_ENUM_FORCE_SIZE = KHRONOS_MAX_ENUM
} khronos_boolean_enum_t;
#endif /* __khrplatform_h_ */

32
src/os/windows/win32.cpp
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@ -820,6 +820,38 @@ int OTTDStringCompare(const char *s1, const char *s2)
return CompareString(MAKELCID(_current_language->winlangid, SORT_DEFAULT), NORM_IGNORECASE, s1_buf, -1, s2_buf, -1);
}
/**
* Is the current Windows version Vista or later?
* @return True if the current Windows is Vista or later.
*/
bool IsWindowsVistaOrGreater()
{
typedef BOOL (WINAPI * LPVERIFYVERSIONINFO)(LPOSVERSIONINFOEX, DWORD, DWORDLONG);
typedef ULONGLONG (NTAPI * LPVERSETCONDITIONMASK)(ULONGLONG, DWORD, BYTE);
#ifdef UNICODE
static LPVERIFYVERSIONINFO _VerifyVersionInfo = (LPVERIFYVERSIONINFO)GetProcAddress(GetModuleHandle(_T("Kernel32")), "VerifyVersionInfoW");
#else
static LPVERIFYVERSIONINFO _VerifyVersionInfo = (LPVERIFYVERSIONINFO)GetProcAddress(GetModuleHandle(_T("Kernel32")), "VerifyVersionInfoA");
#endif
static LPVERSETCONDITIONMASK _VerSetConditionMask = (LPVERSETCONDITIONMASK)GetProcAddress(GetModuleHandle(_T("Kernel32")), "VerSetConditionMask");
if (_VerifyVersionInfo != nullptr && _VerSetConditionMask != nullptr) {
OSVERSIONINFOEX osvi = { sizeof(osvi), 0, 0, 0, 0, {0}, 0, 0 };
DWORDLONG dwlConditionMask = 0;
dwlConditionMask = _VerSetConditionMask(dwlConditionMask, VER_MAJORVERSION, VER_GREATER_EQUAL);
dwlConditionMask = _VerSetConditionMask(dwlConditionMask, VER_MINORVERSION, VER_GREATER_EQUAL);
dwlConditionMask = _VerSetConditionMask(dwlConditionMask, VER_SERVICEPACKMAJOR, VER_GREATER_EQUAL);
osvi.dwMajorVersion = 6;
osvi.dwMinorVersion = 0;
osvi.wServicePackMajor = 0;
return _VerifyVersionInfo(&osvi, VER_MAJORVERSION | VER_MINORVERSION | VER_SERVICEPACKMAJOR, dwlConditionMask) != FALSE;
} else {
return LOBYTE(GetVersion()) >= 6;
}
}
#ifdef _MSC_VER
/* Based on code from MSDN: https://msdn.microsoft.com/en-us/library/xcb2z8hs.aspx */
const DWORD MS_VC_EXCEPTION = 0x406D1388;

1
src/os/windows/win32.h
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@ -39,5 +39,6 @@ HRESULT OTTDSHGetFolderPath(HWND, int, HANDLE, DWORD, LPTSTR);
void Win32SetCurrentLocaleName(const char *iso_code);
int OTTDStringCompare(const char *s1, const char *s2);
bool IsWindowsVistaOrGreater();
#endif /* WIN32_H */

6
src/video/CMakeLists.txt
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@ -7,6 +7,12 @@ if(NOT OPTION_DEDICATED)
CONDITION Allegro_FOUND
)
add_files(
opengl.cpp
opengl.h
CONDITION OPENGL_FOUND
)
add_files(
sdl_v.cpp
sdl_v.h

222
src/video/opengl.cpp Normal file
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@ -0,0 +1,222 @@
/* $Id$ */
/*
* This file is part of OpenTTD.
* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file opengl_v.cpp OpenGL video driver support. */
#include "../stdafx.h"
#if defined(_WIN32)
# include <windows.h>
#endif
#if defined(__APPLE__)
# include <OpenGL/gl3.h>
#else
# include <GL/gl.h>
#endif
#include "../3rdparty/opengl/glext.h"
#include "opengl.h"
#include "../core/mem_func.hpp"
#include "../gfx_func.h"
#include "../debug.h"
#include "../safeguards.h"
/* static */ OpenGLBackend *OpenGLBackend::instance = nullptr;
/**
* Find a substring in a string made of space delimited elements. The substring
* has to match the complete element, partial matches don't count.
* @param string List of space delimited elements.
* @param substring Substring to find.
* @return Pointer to the start of the match or nullptr if the substring is not present.
*/
static const char *FindStringInExtensionList(const char *string, const char *substring)
{
while (1) {
/* Is the extension string present at all? */
const char *pos = strstr(string, substring);
if (pos == nullptr) break;
/* Is this a real match, i.e. are the chars before and after the matched string
* indeed spaces (or the start or end of the string, respectively)? */
const char *end = pos + strlen(substring);
if ((pos == string || pos[-1] == ' ') && (*end == ' ' || *end == '\0')) return pos;
/* False hit, try again for the remaining string. */
string = end;
}
return nullptr;
}
/**
* Check if an OpenGL extension is supported by the current context.
* @param extension The extension string to test.
* @return True if the extension is supported, false if not.
*/
static bool IsOpenGLExtensionSupported(const char *extension)
{
return FindStringInExtensionList((const char *)glGetString(GL_EXTENSIONS), extension) != nullptr;
}
static byte _gl_major_ver = 0; ///< Major OpenGL version.
static byte _gl_minor_ver = 0; ///< Minor OpenGL version.
/**
* Check if the current OpenGL version is equal or higher than a given one.
* @param major Minimal major version.
* @param minor Minimal minor version.
* @pre OpenGL was initialized.
* @return True if the OpenGL version is equal or higher than the requested one.
*/
static bool IsOpenGLVersionAtLeast(byte major, byte minor)
{
return (_gl_major_ver > major) || (_gl_major_ver == major && _gl_minor_ver >= minor);
}
/**
* Create and initialize the singleton back-end class.
*/
/* static */ const char *OpenGLBackend::Create()
{
if (OpenGLBackend::instance != nullptr) OpenGLBackend::Destroy();
OpenGLBackend::instance = new OpenGLBackend();
return OpenGLBackend::instance->Init();
}
/**
* Free resources and destroy singleton back-end class.
*/
/* static */ void OpenGLBackend::Destroy()
{
delete OpenGLBackend::instance;
OpenGLBackend::instance = nullptr;
}
/**
* Construct OpenGL back-end class.
*/
OpenGLBackend::OpenGLBackend()
{
}
/**
* Free allocated resources.
*/
OpenGLBackend::~OpenGLBackend()
{
glDeleteTextures(1, &this->vid_texture);
free(this->vid_buffer);
}
/**
* Check for the needed OpenGL functionality and allocate all resources.
* @return Error string or nullptr if successful.
*/
const char *OpenGLBackend::Init()
{
/* Always query the supported OpenGL version as the current context might have changed. */
const char *ver = (const char *)glGetString(GL_VERSION);
const char *vend = (const char *)glGetString(GL_VENDOR);
const char *renderer = (const char *)glGetString(GL_RENDERER);
if (ver == nullptr || vend == nullptr || renderer == nullptr) return "OpenGL not supported";
DEBUG(driver, 1, "OpenGL driver: %s - %s (%s)", vend, renderer, ver);
const char *minor = strchr(ver, '.');
_gl_major_ver = atoi(ver);
_gl_minor_ver = minor != nullptr ? atoi(minor + 1) : 0;
/* OpenGL 1.3 is the absolute minimum. */
if (!IsOpenGLVersionAtLeast(1, 3)) return "OpenGL version >= 1.3 required";
/* Check for non-power-of-two texture support. */
if (!IsOpenGLVersionAtLeast(2, 0) && !IsOpenGLExtensionSupported("GL_ARB_texture_non_power_of_two")) return "Non-power-of-two textures not supported";
/* Setup video buffer texture. */
glGenTextures(1, &this->vid_texture);
glBindTexture(GL_TEXTURE_2D, this->vid_texture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindTexture(GL_TEXTURE_2D, 0);
if (glGetError() != GL_NO_ERROR) return "Can't generate video buffer texture";
/* Prime vertex array with a full-screen quad. */
static const float vert_array[] = { 1.f, -1.f, 1.f, 1.f, -1.f, -1.f, -1.f, 1.f };
static const float tex_array[] = { 1.f, 1.f, 1.f, 0.f, 0.f, 1.f, 0.f, 0.f };
glVertexPointer(2, GL_FLOAT, 0, vert_array);
glTexCoordPointer(2, GL_FLOAT, 0, tex_array);
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
glDisable(GL_DEPTH_TEST);
glEnable(GL_TEXTURE_2D);
(void)glGetError(); // Clear errors.
return nullptr;
}
/**
* Change the size of the drawing window and allocate matching resources.
* @param w New width of the window.
* @param h New height of the window.
* @param force Recreate resources even if size didn't change.
* @param False if nothing had to be done, true otherwise.
*/
bool OpenGLBackend::Resize(int w, int h, bool force)
{
if (!force && _screen.width == w && _screen.height == h && this->vid_buffer != nullptr) return false;
glViewport(0, 0, w, h);
/* Re-allocate video buffer texture. */
free(this->vid_buffer);
this->vid_buffer = CallocT<uint32>(w * h); // 32bpp
glBindTexture(GL_TEXTURE_2D, this->vid_texture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, w, h, 0, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, nullptr);
glBindTexture(GL_TEXTURE_2D, 0);
/* Set new viewport. */
_screen.height = h;
_screen.width = w;
_screen.pitch = w;
_screen.dst_ptr = this->GetVideoBuffer();
return true;
}
/**
* Render video buffer to the screen.
*/
void OpenGLBackend::Paint()
{
assert(this->vid_buffer != nullptr);
glClear(GL_COLOR_BUFFER_BIT);
/* Update changed rect of the video buffer texture. */
glBindTexture(GL_TEXTURE_2D, this->vid_texture);
glPixelStorei(GL_UNPACK_ROW_LENGTH, _screen.pitch);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, _screen.width, _screen.height, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, this->vid_buffer);
/* Blit video buffer to screen. */
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
}

49
src/video/opengl.h Normal file
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@ -0,0 +1,49 @@
/* $Id$ */
/*
* This file is part of OpenTTD.
* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file opengl.h OpenGL video driver support. */
#ifndef VIDEO_OPENGL_H
#define VIDEO_OPENGL_H
#include "../core/alloc_type.hpp"
/** Platform-independent back-end singleton class for OpenGL video drivers. */
class OpenGLBackend : public ZeroedMemoryAllocator {
private:
static OpenGLBackend *instance; ///< Singleton instance pointer.
void *vid_buffer; ///< Pointer to the memory used for the video driver to draw to.
GLuint vid_texture; ///< Texture handle for the video buffer texture.
OpenGLBackend();
~OpenGLBackend();
const char *Init();
public:
/** Get singleton instance of this class. */
static inline OpenGLBackend *Get()
{
return OpenGLBackend::instance;
}
static const char *Create();
static void Destroy();
bool Resize(int w, int h, bool force = false);
void Paint();
/**
* Get a pointer to the memory for the video driver to draw to.
* @return Pointer to draw on.
*/
void *GetVideoBuffer() { return this->vid_buffer; }
};
#endif /* VIDEO_OPENGL_H */

153
src/video/win32_v.cpp
View File

@ -1114,6 +1114,7 @@ float VideoDriver_Win32Base::GetDPIScale()
bool VideoDriver_Win32Base::LockVideoBuffer()
{
if (_draw_threaded) this->draw_lock.lock();
_screen.dst_ptr = _wnd.buffer_bits;
return true;
}
@ -1319,3 +1320,155 @@ void VideoDriver_Win32GDI::PaintThread()
return _fooctr++;
}
#endif
#ifdef WITH_OPENGL
#include <GL/gl.h>
#include "../3rdparty/opengl/glext.h"
#include "opengl.h"
#ifndef PFD_SUPPORT_COMPOSITION
# define PFD_SUPPORT_COMPOSITION 0x00008000
#endif
static FVideoDriver_Win32OpenGL iFVideoDriver_Win32OpenGL;
const char *VideoDriver_Win32OpenGL::Start(const StringList &param)
{
if (BlitterFactory::GetCurrentBlitter()->GetScreenDepth() != 32) return "Only 32bpp blitters supported";
Dimension old_res = _cur_resolution; // Save current screen resolution in case of errors, as MakeWindow invalidates it.
this->Initialize();
this->MakeWindow(_fullscreen);
/* Create and initialize OpenGL context. */
const char *err = this->AllocateContext();
if (err != nullptr) {
this->Stop();
_cur_resolution = old_res;
return err;
}
this->ClientSizeChanged(_wnd.width, _wnd.height);
_draw_threaded = false;
MarkWholeScreenDirty();
return nullptr;
}
void VideoDriver_Win32OpenGL::Stop()
{
this->DestroyContext();
this->VideoDriver_Win32Base::Stop();
}
void VideoDriver_Win32OpenGL::DestroyContext()
{
OpenGLBackend::Destroy();
wglMakeCurrent(nullptr, nullptr);
if (this->gl_rc != nullptr) {
wglDeleteContext(this->gl_rc);
this->gl_rc = nullptr;
}
if (this->dc != nullptr) {
ReleaseDC(this->main_wnd, this->dc);
this->dc = nullptr;
}
}
const char *VideoDriver_Win32OpenGL::AllocateContext()
{
PIXELFORMATDESCRIPTOR pfd = {
sizeof(PIXELFORMATDESCRIPTOR), // Size of this struct.
1, // Version of this struct.
PFD_DRAW_TO_WINDOW | // Require window support.
PFD_SUPPORT_OPENGL | // Require OpenGL support.
PFD_DOUBLEBUFFER | // Use double buffering.
PFD_DEPTH_DONTCARE,
PFD_TYPE_RGBA, // Request RGBA format.
24, // 24 bpp (excluding alpha).
0, 0, 0, 0, 0, 0, 0, 0, // Colour bits and shift ignored.
0, 0, 0, 0, 0, // No accumulation buffer.
0, 0, // No depth/stencil buffer.
0, // No aux buffers.
PFD_MAIN_PLANE, // Main layer.
0, 0, 0, 0 // Ignored/reserved.
};
if (IsWindowsVistaOrGreater()) pfd.dwFlags |= PFD_SUPPORT_COMPOSITION; // Make OpenTTD compatible with Aero.
this->dc = GetDC(this->main_wnd);
/* Choose a suitable pixel format. */
int format = ChoosePixelFormat(this->dc, &pfd);
if (format == 0) return "No suitable pixel format found";
if (!SetPixelFormat(this->dc, format, &pfd)) return "Can't set pixel format";
/* Create OpenGL device context. */
this->gl_rc = wglCreateContext(this->dc);
if (this->gl_rc == 0) return "Can't create OpenGL context";
if (!wglMakeCurrent(this->dc, this->gl_rc)) return "Can't active GL context";
return OpenGLBackend::Create();
}
bool VideoDriver_Win32OpenGL::ToggleFullscreen(bool full_screen)
{
this->DestroyContext();
bool res = this->VideoDriver_Win32Base::ToggleFullscreen(full_screen);
res &= this->AllocateContext() == nullptr;
this->ClientSizeChanged(_wnd.width, _wnd.height);
return res;
}
bool VideoDriver_Win32OpenGL::AfterBlitterChange()
{
assert(BlitterFactory::GetCurrentBlitter()->GetScreenDepth() != 0);
this->ClientSizeChanged(_wnd.width, _wnd.height);
return true;
}
bool VideoDriver_Win32OpenGL::AllocateBackingStore(int w, int h, bool force)
{
if (!force && w == _screen.width && h == _screen.height) return false;
_wnd.width = w = std::max(w, 64);
_wnd.height = h = std::max(h, 64);
if (this->gl_rc == nullptr) return false;
bool res = OpenGLBackend::Get()->Resize(w, h);
_wnd.buffer_bits = OpenGLBackend::Get()->GetVideoBuffer();
return res;
}
void VideoDriver_Win32OpenGL::Paint()
{
PerformanceMeasurer framerate(PFE_VIDEO);
if (_cur_palette.count_dirty != 0) {
Blitter *blitter = BlitterFactory::GetCurrentBlitter();
switch (blitter->UsePaletteAnimation()) {
case Blitter::PALETTE_ANIMATION_BLITTER:
blitter->PaletteAnimate(_local_palette);
break;
case Blitter::PALETTE_ANIMATION_VIDEO_BACKEND:
case Blitter::PALETTE_ANIMATION_NONE:
break;
default:
NOT_REACHED();
}
_cur_palette.count_dirty = 0;
}
OpenGLBackend::Get()->Paint();
SwapBuffers(this->dc);
}
#endif /* WITH_OPENGL */

48
src/video/win32_v.h
View File

@ -48,8 +48,10 @@ protected:
void Initialize();
bool MakeWindow(bool full_screen);
virtual uint8 GetFullscreenBpp();
void ClientSizeChanged(int w, int h);
/** Get screen depth to use for fullscreen mode. */
virtual uint8 GetFullscreenBpp();
/** (Re-)create the backing store. */
virtual bool AllocateBackingStore(int w, int h, bool force = false) = 0;
/** Palette of the window has changed. */
@ -58,8 +60,6 @@ protected:
private:
std::unique_lock<std::recursive_mutex> draw_lock;
void ClientSizeChanged(int w, int h);
static void PaintThreadThunk(VideoDriver_Win32Base *drv);
friend LRESULT CALLBACK WndProcGdi(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam);
@ -102,4 +102,46 @@ public:
Driver *CreateInstance() const override { return new VideoDriver_Win32GDI(); }
};
#ifdef WITH_OPENGL
/** The OpenGL video driver for windows. */
class VideoDriver_Win32OpenGL : public VideoDriver_Win32Base {
public:
VideoDriver_Win32OpenGL() : dc(nullptr), gl_rc(nullptr) {}
const char *Start(const StringList &param) override;
void Stop() override;
bool ToggleFullscreen(bool fullscreen) override;
bool AfterBlitterChange() override;
const char *GetName() const override { return "win32-opengl"; }
protected:
HDC dc; ///< Window device context.
HGLRC gl_rc; ///< OpenGL context.
uint8 GetFullscreenBpp() override { return 32; } // OpenGL is always 32 bpp.
void Paint() override;
void PaintThread() override {}
bool AllocateBackingStore(int w, int h, bool force = false) override;
void PaletteChanged(HWND hWnd) override {}
const char *AllocateContext();
void DestroyContext();
};
/** The factory for Windows' OpenGL video driver. */
class FVideoDriver_Win32OpenGL : public DriverFactoryBase {
public:
FVideoDriver_Win32OpenGL() : DriverFactoryBase(Driver::DT_VIDEO, 9, "win32-opengl", "Win32 OpenGL Video Driver") {}
/* virtual */ Driver *CreateInstance() const override { return new VideoDriver_Win32OpenGL(); }
};
#endif /* WITH_OPENGL */
#endif /* VIDEO_WIN32_H */