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Add GLFW_CONTEXT_RENDERER

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This window hint allows choosing between hardware and software renderers
(where available) for the created OpenGL or OpenGL ES context.

Fixes #589.
This commit is contained in:
Camilla Löwy 2017-12-07 16:38:51 +01:00
parent 682f1cf203
commit d79056fc27
10 changed files with 92 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
README.md
View File

@ -160,6 +160,8 @@ information on what to include when reporting a bug.
(#749,#842)
- Added `GLFW_JOYSTICK_HAT_BUTTONS` init hint (#889)
- Added `GLFW_LOCK_KEY_MODS` input mode and `GLFW_MOD_*_LOCK` mod bits (#946)
- Added `GLFW_CONTEXT_RENDERER` window hint and `GLFW_HARDWARE_RENDERER` and
`GLFW_SOFTWARE_RENDERER` hint values (#589)
- Added macOS specific `GLFW_COCOA_RETINA_FRAMEBUFFER` window hint
- Added macOS specific `GLFW_COCOA_FRAME_AUTOSAVE` window hint (#195)
- Added macOS specific `GLFW_COCOA_GRAPHICS_SWITCHING` window hint (#377,#935)

6
docs/window.dox
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@ -339,6 +339,11 @@ the selected API.
in a single process will cause the application to segfault. Stick to one API or
the other on Linux for now.
@anchor GLFW_CONTEXT_RENDERER_hint
__GLFW_CONTEXT_RENDERER__ specifies whether to create the context using
a hardware or software renderer, if that is possible to control on the current
platform.
@anchor GLFW_CONTEXT_VERSION_MAJOR_hint
@anchor GLFW_CONTEXT_VERSION_MINOR_hint
__GLFW_CONTEXT_VERSION_MAJOR__ and __GLFW_CONTEXT_VERSION_MINOR__ specify the
@ -496,6 +501,7 @@ GLFW_SRGB_CAPABLE | `GLFW_FALSE` | `GLFW_TRUE` or `GL
GLFW_DOUBLEBUFFER | `GLFW_TRUE` | `GLFW_TRUE` or `GLFW_FALSE`
GLFW_CLIENT_API | `GLFW_OPENGL_API` | `GLFW_OPENGL_API`, `GLFW_OPENGL_ES_API` or `GLFW_NO_API`
GLFW_CONTEXT_CREATION_API | `GLFW_NATIVE_CONTEXT_API` | `GLFW_NATIVE_CONTEXT_API`, `GLFW_EGL_CONTEXT_API` or `GLFW_OSMESA_CONTEXT_API`
GLFW_CONTEXT_RENDERER | `GLFW_HARDWARE_RENDERER` | `GLFW_HARDWARE_RENDERER` or `GLFW_SOFTWARE_RENDERER`
GLFW_CONTEXT_VERSION_MAJOR | 1 | Any valid major version number of the chosen client API
GLFW_CONTEXT_VERSION_MINOR | 0 | Any valid minor version number of the chosen client API
GLFW_CONTEXT_ROBUSTNESS | `GLFW_NO_ROBUSTNESS` | `GLFW_NO_ROBUSTNESS`, `GLFW_NO_RESET_NOTIFICATION` or `GLFW_LOSE_CONTEXT_ON_RESET`

4
include/GLFW/glfw3.h
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@ -962,6 +962,7 @@ extern "C" {
* [attribute](@ref GLFW_CLIENT_API_attrib).
*/
#define GLFW_CONTEXT_CREATION_API 0x0002200B
#define GLFW_CONTEXT_RENDERER 0x0002200C
#define GLFW_COCOA_RETINA_FRAMEBUFFER 0x00023001
#define GLFW_COCOA_FRAME_AUTOSAVE 0x00023002
@ -997,6 +998,9 @@ extern "C" {
#define GLFW_EGL_CONTEXT_API 0x00036002
#define GLFW_OSMESA_CONTEXT_API 0x00036003
#define GLFW_HARDWARE_RENDERER 0x00037001
#define GLFW_SOFTWARE_RENDERER 0x00037002
/*! @defgroup shapes Standard cursor shapes
* @brief Standard system cursor shapes.
*

9
src/context.c
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@ -50,6 +50,15 @@ GLFWbool _glfwIsValidContextConfig(const _GLFWctxconfig* ctxconfig)
return GLFW_FALSE;
}
if (ctxconfig->renderer != GLFW_HARDWARE_RENDERER &&
ctxconfig->renderer != GLFW_SOFTWARE_RENDERER)
{
_glfwInputError(GLFW_INVALID_ENUM,
"Invalid context renderer 0x%08X",
ctxconfig->renderer);
return GLFW_FALSE;
}
if (ctxconfig->client != GLFW_NO_API &&
ctxconfig->client != GLFW_OPENGL_API &&
ctxconfig->client != GLFW_OPENGL_ES_API)

3
src/glx_context.c
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@ -460,6 +460,9 @@ GLFWbool _glfwCreateContextGLX(_GLFWwindow* window,
return GLFW_FALSE;
}
if (ctxconfig->renderer == GLFW_SOFTWARE_RENDERER)
setenv("LIBGL_ALWAYS_SOFTWARE", "1", 1);
if (ctxconfig->client == GLFW_OPENGL_ES_API)
{
if (!_glfw.glx.ARB_create_context ||

1
src/internal.h
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@ -330,6 +330,7 @@ struct _GLFWctxconfig
int profile;
int robustness;
int release;
int renderer;
_GLFWwindow* share;
struct {
GLFWbool offline;

12
src/nsgl_context.m
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@ -26,6 +26,8 @@
#include "internal.h"
#include <OpenGL/CGLRenderers.h>
static void makeContextCurrentNSGL(_GLFWwindow* window)
{
@ -165,9 +167,17 @@ GLFWbool _glfwCreateContextNSGL(_GLFWwindow* window,
NSOpenGLPixelFormatAttribute attribs[40];
int index = 0;
addAttrib(NSOpenGLPFAAccelerated);
addAttrib(NSOpenGLPFAClosestPolicy);
if (ctxconfig->renderer == GLFW_HARDWARE_RENDERER)
{
addAttrib(NSOpenGLPFAAccelerated);
}
else if (ctxconfig->renderer == GLFW_SOFTWARE_RENDERER)
{
setAttrib(NSOpenGLPFARendererID, kCGLRendererGenericFloatID);
}
if (ctxconfig->nsgl.offline)
{
addAttrib(NSOpenGLPFAAllowOfflineRenderers);

22
src/wgl_context.c
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@ -100,11 +100,22 @@ static int choosePixelFormat(_GLFWwindow* window,
continue;
}
if (ctxconfig->renderer == GLFW_HARDWARE_RENDERER)
{
if (getPixelFormatAttrib(window, n, WGL_ACCELERATION_ARB) ==
WGL_NO_ACCELERATION_ARB)
{
continue;
}
}
else if (ctxconfig->renderer == GLFW_SOFTWARE_RENDERER)
{
if (getPixelFormatAttrib(window, n, WGL_ACCELERATION_ARB) !=
WGL_NO_ACCELERATION_ARB)
{
continue;
}
}
u->redBits = getPixelFormatAttrib(window, n, WGL_RED_BITS_ARB);
u->greenBits = getPixelFormatAttrib(window, n, WGL_GREEN_BITS_ARB);
@ -170,11 +181,22 @@ static int choosePixelFormat(_GLFWwindow* window,
continue;
}
if (ctxconfig->renderer == GLFW_HARDWARE_RENDERER)
{
if (!(pfd.dwFlags & PFD_GENERIC_ACCELERATED) &&
(pfd.dwFlags & PFD_GENERIC_FORMAT))
{
continue;
}
}
else if (ctxconfig->renderer == GLFW_SOFTWARE_RENDERER)
{
if ((pfd.dwFlags & PFD_GENERIC_ACCELERATED) &&
!(pfd.dwFlags & PFD_GENERIC_FORMAT))
{
continue;
}
}
if (pfd.iPixelType != PFD_TYPE_RGBA)
continue;

4
src/window.c
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@ -241,6 +241,7 @@ void glfwDefaultWindowHints(void)
memset(&_glfw.hints.context, 0, sizeof(_glfw.hints.context));
_glfw.hints.context.client = GLFW_OPENGL_API;
_glfw.hints.context.source = GLFW_NATIVE_CONTEXT_API;
_glfw.hints.context.renderer = GLFW_HARDWARE_RENDERER;
_glfw.hints.context.major = 1;
_glfw.hints.context.minor = 0;
@ -364,6 +365,9 @@ GLFWAPI void glfwWindowHint(int hint, int value)
case GLFW_CONTEXT_CREATION_API:
_glfw.hints.context.source = value;
return;
case GLFW_CONTEXT_RENDERER:
_glfw.hints.context.renderer = value;
return;
case GLFW_CONTEXT_VERSION_MAJOR:
_glfw.hints.context.major = value;
return;

21
tests/glfwinfo.c
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@ -54,6 +54,9 @@
#define BEHAVIOR_NAME_NONE "none"
#define BEHAVIOR_NAME_FLUSH "flush"
#define RENDERER_NAME_HW "hw"
#define RENDERER_NAME_SW "sw"
static void usage(void)
{
printf("Usage: glfwinfo [OPTION]...\n");
@ -68,6 +71,9 @@ static void usage(void)
API_NAME_NATIVE " or "
API_NAME_EGL " or "
API_NAME_OSMESA ")\n");
printf(" --renderer=RENDERER the renderer to use ("
RENDERER_NAME_HW " or "
RENDERER_NAME_SW ")\n");
printf(" -d, --debug request a debug context\n");
printf(" -f, --forward require a forward-compatible context\n");
printf(" -h, --help show this help\n");
@ -365,7 +371,8 @@ int main(int argc, char** argv)
GLenum error;
GLFWwindow* window;
enum { CLIENT, CONTEXT, BEHAVIOR, DEBUG, FORWARD, HELP, EXTENSIONS, LAYERS,
enum { CLIENT, CONTEXT, RENDERER, BEHAVIOR, DEBUG, FORWARD,
HELP, EXTENSIONS, LAYERS,
MAJOR, MINOR, PROFILE, ROBUSTNESS, VERSION,
REDBITS, GREENBITS, BLUEBITS, ALPHABITS, DEPTHBITS, STENCILBITS,
ACCUMREDBITS, ACCUMGREENBITS, ACCUMBLUEBITS, ACCUMALPHABITS,
@ -375,6 +382,7 @@ int main(int argc, char** argv)
{ "behavior", 1, NULL, BEHAVIOR },
{ "client-api", 1, NULL, CLIENT },
{ "context-api", 1, NULL, CONTEXT },
{ "renderer", 1, NULL, RENDERER },
{ "debug", 0, NULL, DEBUG },
{ "forward", 0, NULL, FORWARD },
{ "help", 0, NULL, HELP },
@ -464,6 +472,17 @@ int main(int argc, char** argv)
exit(EXIT_FAILURE);
}
break;
case RENDERER:
if (strcasecmp(optarg, RENDERER_NAME_HW) == 0)
glfwWindowHint(GLFW_CONTEXT_RENDERER, GLFW_HARDWARE_RENDERER);
else if (strcasecmp(optarg, RENDERER_NAME_SW) == 0)
glfwWindowHint(GLFW_CONTEXT_RENDERER, GLFW_SOFTWARE_RENDERER);
else
{
usage();
exit(EXIT_FAILURE);
}
break;
case 'd':
case DEBUG:
glfwWindowHint(GLFW_OPENGL_DEBUG_CONTEXT, GLFW_TRUE);