Add: [Win32] Video driver that uses OpenGL to transfer the video buffer to the screen.
Michael Lutz
3 years ago
parent
af4d32357c
commit
ef478ade64
@ -1,3 +1,4 @@
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add_subdirectory(md5)
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add_subdirectory(squirrel)
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add_subdirectory(opengl)
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add_subdirectory(os2)
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@ -0,0 +1,5 @@
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add_files(
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khrplatform.h
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glext.h
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CONDITION OPENGL_FOUND
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)
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File diff suppressed because it is too large
Load Diff
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#ifndef __khrplatform_h_
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#define __khrplatform_h_
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/*
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** Copyright (c) 2008-2018 The Khronos Group Inc.
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**
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** Permission is hereby granted, free of charge, to any person obtaining a
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** copy of this software and/or associated documentation files (the
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** "Materials"), to deal in the Materials without restriction, including
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** without limitation the rights to use, copy, modify, merge, publish,
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** distribute, sublicense, and/or sell copies of the Materials, and to
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** permit persons to whom the Materials are furnished to do so, subject to
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** the following conditions:
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**
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** The above copyright notice and this permission notice shall be included
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** in all copies or substantial portions of the Materials.
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**
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** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
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*/
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/* Khronos platform-specific types and definitions.
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*
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* The master copy of khrplatform.h is maintained in the Khronos EGL
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* Registry repository at https://github.com/KhronosGroup/EGL-Registry
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* The last semantic modification to khrplatform.h was at commit ID:
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* 67a3e0864c2d75ea5287b9f3d2eb74a745936692
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*
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* Adopters may modify this file to suit their platform. Adopters are
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* encouraged to submit platform specific modifications to the Khronos
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* group so that they can be included in future versions of this file.
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* Please submit changes by filing pull requests or issues on
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* the EGL Registry repository linked above.
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*
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*
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* See the Implementer's Guidelines for information about where this file
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* should be located on your system and for more details of its use:
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* http://www.khronos.org/registry/implementers_guide.pdf
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*
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* This file should be included as
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* #include <KHR/khrplatform.h>
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* by Khronos client API header files that use its types and defines.
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*
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* The types in khrplatform.h should only be used to define API-specific types.
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*
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* Types defined in khrplatform.h:
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* khronos_int8_t signed 8 bit
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* khronos_uint8_t unsigned 8 bit
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* khronos_int16_t signed 16 bit
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* khronos_uint16_t unsigned 16 bit
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* khronos_int32_t signed 32 bit
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* khronos_uint32_t unsigned 32 bit
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* khronos_int64_t signed 64 bit
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* khronos_uint64_t unsigned 64 bit
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* khronos_intptr_t signed same number of bits as a pointer
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* khronos_uintptr_t unsigned same number of bits as a pointer
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* khronos_ssize_t signed size
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* khronos_usize_t unsigned size
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* khronos_float_t signed 32 bit floating point
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* khronos_time_ns_t unsigned 64 bit time in nanoseconds
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* khronos_utime_nanoseconds_t unsigned time interval or absolute time in
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* nanoseconds
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* khronos_stime_nanoseconds_t signed time interval in nanoseconds
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* khronos_boolean_enum_t enumerated boolean type. This should
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* only be used as a base type when a client API's boolean type is
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* an enum. Client APIs which use an integer or other type for
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* booleans cannot use this as the base type for their boolean.
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*
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* Tokens defined in khrplatform.h:
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*
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* KHRONOS_FALSE, KHRONOS_TRUE Enumerated boolean false/true values.
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*
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* KHRONOS_SUPPORT_INT64 is 1 if 64 bit integers are supported; otherwise 0.
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* KHRONOS_SUPPORT_FLOAT is 1 if floats are supported; otherwise 0.
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*
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* Calling convention macros defined in this file:
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* KHRONOS_APICALL
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* KHRONOS_APIENTRY
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* KHRONOS_APIATTRIBUTES
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*
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* These may be used in function prototypes as:
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*
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* KHRONOS_APICALL void KHRONOS_APIENTRY funcname(
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* int arg1,
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* int arg2) KHRONOS_APIATTRIBUTES;
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*/
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#if defined(__SCITECH_SNAP__) && !defined(KHRONOS_STATIC)
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# define KHRONOS_STATIC 1
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#endif
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/*-------------------------------------------------------------------------
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* Definition of KHRONOS_APICALL
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*-------------------------------------------------------------------------
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* This precedes the return type of the function in the function prototype.
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*/
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#if defined(KHRONOS_STATIC)
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/* If the preprocessor constant KHRONOS_STATIC is defined, make the
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* header compatible with static linking. */
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# define KHRONOS_APICALL
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#elif defined(_WIN32)
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# define KHRONOS_APICALL __declspec(dllimport)
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#elif defined (__SYMBIAN32__)
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# define KHRONOS_APICALL IMPORT_C
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#elif defined(__ANDROID__)
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# define KHRONOS_APICALL __attribute__((visibility("default")))
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#else
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# define KHRONOS_APICALL
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#endif
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/*-------------------------------------------------------------------------
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* Definition of KHRONOS_APIENTRY
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*-------------------------------------------------------------------------
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* This follows the return type of the function and precedes the function
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* name in the function prototype.
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*/
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#if defined(_WIN32) && !defined(_WIN32_WCE) && !defined(__SCITECH_SNAP__)
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/* Win32 but not WinCE */
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# define KHRONOS_APIENTRY __stdcall
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#else
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# define KHRONOS_APIENTRY
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#endif
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/*-------------------------------------------------------------------------
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* Definition of KHRONOS_APIATTRIBUTES
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*-------------------------------------------------------------------------
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* This follows the closing parenthesis of the function prototype arguments.
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*/
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#if defined (__ARMCC_2__)
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#define KHRONOS_APIATTRIBUTES __softfp
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#else
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#define KHRONOS_APIATTRIBUTES
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#endif
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/*-------------------------------------------------------------------------
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* basic type definitions
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*-----------------------------------------------------------------------*/
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#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || defined(__GNUC__) || defined(__SCO__) || defined(__USLC__)
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/*
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* Using <stdint.h>
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*/
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#include <stdint.h>
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typedef int32_t khronos_int32_t;
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typedef uint32_t khronos_uint32_t;
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typedef int64_t khronos_int64_t;
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typedef uint64_t khronos_uint64_t;
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#define KHRONOS_SUPPORT_INT64 1
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#define KHRONOS_SUPPORT_FLOAT 1
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#elif defined(__VMS ) || defined(__sgi)
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/*
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* Using <inttypes.h>
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*/
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#include <inttypes.h>
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typedef int32_t khronos_int32_t;
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typedef uint32_t khronos_uint32_t;
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typedef int64_t khronos_int64_t;
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typedef uint64_t khronos_uint64_t;
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#define KHRONOS_SUPPORT_INT64 1
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#define KHRONOS_SUPPORT_FLOAT 1
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#elif defined(_WIN32) && !defined(__SCITECH_SNAP__)
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/*
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* Win32
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*/
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typedef __int32 khronos_int32_t;
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typedef unsigned __int32 khronos_uint32_t;
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typedef __int64 khronos_int64_t;
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typedef unsigned __int64 khronos_uint64_t;
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#define KHRONOS_SUPPORT_INT64 1
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#define KHRONOS_SUPPORT_FLOAT 1
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#elif defined(__sun__) || defined(__digital__)
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/*
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* Sun or Digital
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*/
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typedef int khronos_int32_t;
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typedef unsigned int khronos_uint32_t;
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#if defined(__arch64__) || defined(_LP64)
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typedef long int khronos_int64_t;
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typedef unsigned long int khronos_uint64_t;
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#else
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typedef long long int khronos_int64_t;
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typedef unsigned long long int khronos_uint64_t;
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#endif /* __arch64__ */
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#define KHRONOS_SUPPORT_INT64 1
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#define KHRONOS_SUPPORT_FLOAT 1
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#elif 0
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/*
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* Hypothetical platform with no float or int64 support
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*/
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typedef int khronos_int32_t;
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typedef unsigned int khronos_uint32_t;
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#define KHRONOS_SUPPORT_INT64 0
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#define KHRONOS_SUPPORT_FLOAT 0
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#else
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/*
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* Generic fallback
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*/
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#include <stdint.h>
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typedef int32_t khronos_int32_t;
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typedef uint32_t khronos_uint32_t;
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typedef int64_t khronos_int64_t;
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typedef uint64_t khronos_uint64_t;
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#define KHRONOS_SUPPORT_INT64 1
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#define KHRONOS_SUPPORT_FLOAT 1
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#endif
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/*
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* Types that are (so far) the same on all platforms
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*/
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typedef signed char khronos_int8_t;
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typedef unsigned char khronos_uint8_t;
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typedef signed short int khronos_int16_t;
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typedef unsigned short int khronos_uint16_t;
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/*
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* Types that differ between LLP64 and LP64 architectures - in LLP64,
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* pointers are 64 bits, but 'long' is still 32 bits. Win64 appears
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* to be the only LLP64 architecture in current use.
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*/
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#ifdef _WIN64
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typedef signed long long int khronos_intptr_t;
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typedef unsigned long long int khronos_uintptr_t;
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typedef signed long long int khronos_ssize_t;
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typedef unsigned long long int khronos_usize_t;
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#else
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typedef signed long int khronos_intptr_t;
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typedef unsigned long int khronos_uintptr_t;
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typedef signed long int khronos_ssize_t;
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typedef unsigned long int khronos_usize_t;
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#endif
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#if KHRONOS_SUPPORT_FLOAT
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/*
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* Float type
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*/
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typedef float khronos_float_t;
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#endif
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#if KHRONOS_SUPPORT_INT64
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/* Time types
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*
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* These types can be used to represent a time interval in nanoseconds or
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* an absolute Unadjusted System Time. Unadjusted System Time is the number
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* of nanoseconds since some arbitrary system event (e.g. since the last
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* time the system booted). The Unadjusted System Time is an unsigned
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* 64 bit value that wraps back to 0 every 584 years. Time intervals
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* may be either signed or unsigned.
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*/
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typedef khronos_uint64_t khronos_utime_nanoseconds_t;
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typedef khronos_int64_t khronos_stime_nanoseconds_t;
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#endif
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/*
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* Dummy value used to pad enum types to 32 bits.
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*/
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#ifndef KHRONOS_MAX_ENUM
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#define KHRONOS_MAX_ENUM 0x7FFFFFFF
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#endif
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/*
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* Enumerated boolean type
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*
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* Values other than zero should be considered to be true. Therefore
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* comparisons should not be made against KHRONOS_TRUE.
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*/
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typedef enum {
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KHRONOS_FALSE = 0,
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KHRONOS_TRUE = 1,
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KHRONOS_BOOLEAN_ENUM_FORCE_SIZE = KHRONOS_MAX_ENUM
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} khronos_boolean_enum_t;
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#endif /* __khrplatform_h_ */
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@ -0,0 +1,222 @@
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/* $Id$ */
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/*
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* This file is part of OpenTTD.
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* 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.
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* 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.
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* 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/>.
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*/
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/** @file opengl_v.cpp OpenGL video driver support. */
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#include "../stdafx.h"
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#if defined(_WIN32)
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# include <windows.h>
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#endif
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#if defined(__APPLE__)
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# include <OpenGL/gl3.h>
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#else
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# include <GL/gl.h>
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#endif
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#include "../3rdparty/opengl/glext.h"
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#include "opengl.h"
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#include "../core/mem_func.hpp"
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#include "../gfx_func.h"
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#include "../debug.h"
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#include "../safeguards.h"
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/* static */ OpenGLBackend *OpenGLBackend::instance = nullptr;
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/**
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* Find a substring in a string made of space delimited elements. The substring
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* has to match the complete element, partial matches don't count.
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* @param string List of space delimited elements.
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* @param substring Substring to find.
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* @return Pointer to the start of the match or nullptr if the substring is not present.
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*/
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static const char *FindStringInExtensionList(const char *string, const char *substring)
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{
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while (1) {
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/* Is the extension string present at all? */
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const char *pos = strstr(string, substring);
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if (pos == nullptr) break;
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/* Is this a real match, i.e. are the chars before and after the matched string
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* indeed spaces (or the start or end of the string, respectively)? */
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const char *end = pos + strlen(substring);
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if ((pos == string || pos[-1] == ' ') && (*end == ' ' || *end == '\0')) return pos;
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/* False hit, try again for the remaining string. */
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string = end;
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}
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return nullptr;
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}
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/**
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* Check if an OpenGL extension is supported by the current context.
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* @param extension The extension string to test.
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* @return True if the extension is supported, false if not.
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*/
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static bool IsOpenGLExtensionSupported(const char *extension)
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{
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return FindStringInExtensionList((const char *)glGetString(GL_EXTENSIONS), extension) != nullptr;
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}
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static byte _gl_major_ver = 0; ///< Major OpenGL version.
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static byte _gl_minor_ver = 0; ///< Minor OpenGL version.
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/**
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||||
* Check if the current OpenGL version is equal or higher than a given one.
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||||
* @param major Minimal major version.
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||||
* @param minor Minimal minor version.
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* @pre OpenGL was initialized.
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||||
* @return True if the OpenGL version is equal or higher than the requested one.
|
||||
*/
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static bool IsOpenGLVersionAtLeast(byte major, byte minor)
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{
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return (_gl_major_ver > major) || (_gl_major_ver == major && _gl_minor_ver >= minor);
|
||||
}
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||||
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|
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/**
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||||
* Create and initialize the singleton back-end class.
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||||
*/
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||||
/* static */ const char *OpenGLBackend::Create()
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||||
{
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||||
if (OpenGLBackend::instance != nullptr) OpenGLBackend::Destroy();
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||||
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OpenGLBackend::instance = new OpenGLBackend();
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||||
return OpenGLBackend::instance->Init();
|
||||
}
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||||
|
||||
/**
|
||||
* Free resources and destroy singleton back-end class.
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||||
*/
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||||
/* static */ void OpenGLBackend::Destroy()
|
||||
{
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||||
delete OpenGLBackend::instance;
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||||
OpenGLBackend::instance = nullptr;
|
||||
}
|
||||
|
||||
/**
|
||||
* Construct OpenGL back-end class.
|
||||
*/
|
||||
OpenGLBackend::OpenGLBackend()
|
||||
{
|
||||
}
|
||||
|
||||
/**
|
||||
* Free allocated resources.
|
||||
*/
|
||||
OpenGLBackend::~OpenGLBackend()
|
||||
{
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||||
glDeleteTextures(1, &this->vid_texture);
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||||
free(this->vid_buffer);
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||||
}
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||||
|
||||
/**
|
||||
* Check for the needed OpenGL functionality and allocate all resources.
|
||||
* @return Error string or nullptr if successful.
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||||
*/
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||||
const char *OpenGLBackend::Init()
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||||
{
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||||
/* Always query the supported OpenGL version as the current context might have changed. */
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||||
const char *ver = (const char *)glGetString(GL_VERSION);
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||||
const char *vend = (const char *)glGetString(GL_VENDOR);
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||||
const char *renderer = (const char *)glGetString(GL_RENDERER);
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||||
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||||
if (ver == nullptr || vend == nullptr || renderer == nullptr) return "OpenGL not supported";
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||||
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||||
DEBUG(driver, 1, "OpenGL driver: %s - %s (%s)", vend, renderer, ver);
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||||
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||||
const char *minor = strchr(ver, '.');
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||||
_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);
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||||
glBindTexture(GL_TEXTURE_2D, this->vid_texture);
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||||
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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||||
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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||||
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
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||||
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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||||
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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||||
glBindTexture(GL_TEXTURE_2D, 0);
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||||
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);
|
||||
}
|
||||
|
||||
@ -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 */
|
||||
Loading…
Reference in New Issue