src/SDL_internal.h
author Sam Lantinga <slouken@libsdl.org>
Wed, 18 Oct 2017 08:52:04 -0700
changeset 11630 ad4b5d85edee
parent 10925 4de9d54bbc87
child 11726 27d08f1aab80
permissions -rw-r--r--
Fixed bug 3821 - Allow SDL_CreateWindow and SDL_CreateRenderer with OpenGL ES 3.0 (GLES3) for Angle (Windows)

Carlos

Angle supports GLES3 but when using these functions (SDL_CreateWindow and SDL_CreateRenderer), defaults again to GLES2.0.

A current workaround (hack) to retrieve a GLES3.0 context with Angle is:

1) set

SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);

after InitSDL AND after calling SDL_CreateWindow (before SDL_CreateRenderer)

2) Comment lines 2032-2044 in SDL_render_gles2.c, funtion GLES2_CreateRenderer

window_flags = SDL_GetWindowFlags(window);
if (!(window_flags & SDL_WINDOW_OPENGL) ||
profile_mask != SDL_GL_CONTEXT_PROFILE_ES || major != RENDERER_CONTEXT_MAJOR || minor != RENDERER_CONTEXT_MINOR) {

changed_window = SDL_TRUE;
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, RENDERER_CONTEXT_MAJOR);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, RENDERER_CONTEXT_MINOR);

if (SDL_RecreateWindow(window, window_flags | SDL_WINDOW_OPENGL) < 0) {
goto error;
}
}

This retrives a GLES3 context as confirmed using glGetString(GL_VERSION). This should be fixed by modifying a few if's.
     1 /*
     2   Simple DirectMedia Layer
     3   Copyright (C) 1997-2017 Sam Lantinga <slouken@libsdl.org>
     4 
     5   This software is provided 'as-is', without any express or implied
     6   warranty.  In no event will the authors be held liable for any damages
     7   arising from the use of this software.
     8 
     9   Permission is granted to anyone to use this software for any purpose,
    10   including commercial applications, and to alter it and redistribute it
    11   freely, subject to the following restrictions:
    12 
    13   1. The origin of this software must not be misrepresented; you must not
    14      claim that you wrote the original software. If you use this software
    15      in a product, an acknowledgment in the product documentation would be
    16      appreciated but is not required.
    17   2. Altered source versions must be plainly marked as such, and must not be
    18      misrepresented as being the original software.
    19   3. This notice may not be removed or altered from any source distribution.
    20 */
    21 #ifndef SDL_internal_h_
    22 #define SDL_internal_h_
    23 
    24 /* Many of SDL's features require _GNU_SOURCE on various platforms */
    25 #ifndef _GNU_SOURCE
    26 #define _GNU_SOURCE
    27 #endif
    28 
    29 /* This is for a variable-length array at the end of a struct:
    30     struct x { int y; char z[SDL_VARIABLE_LENGTH_ARRAY]; };
    31    Use this because GCC 2 needs different magic than other compilers. */
    32 #if (defined(__GNUC__) && (__GNUC__ <= 2)) || defined(__CC_ARM)
    33 #define SDL_VARIABLE_LENGTH_ARRAY 1
    34 #else
    35 #define SDL_VARIABLE_LENGTH_ARRAY
    36 #endif
    37 
    38 #include "dynapi/SDL_dynapi.h"
    39 
    40 #if SDL_DYNAMIC_API
    41 #include "dynapi/SDL_dynapi_overrides.h"
    42 /* force DECLSPEC and SDLCALL off...it's all internal symbols now.
    43    These will have actual #defines during SDL_dynapi.c only */
    44 #define DECLSPEC
    45 #define SDLCALL
    46 #endif
    47 
    48 #include "SDL_config.h"
    49 
    50 #endif /* SDL_internal_h_ */
    51 
    52 /* vi: set ts=4 sw=4 expandtab: */