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OpenGL 2.1 is now required to use love.graphics (resolves issue #779.)

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Removed love.graphics.isSupported("canvas", "shader", "npot", "subtractive", and "mipmap"), since those features are all guaranteed by the minimum system requirements.

--HG--
branch : minor
This commit is contained in:
Alex Szpakowski
2014-03-12 02:26:32 -03:00
parent a94637ef2b
commit caa61563cc
19 changed files with 247 additions and 559 deletions
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src/modules/graphics/opengl/Graphics.cpp
+34 -20
View File
@@ -55,6 +55,7 @@ Graphics::Graphics()
, created(false)
, activeStencil(false)
, savedState()
, displayedMinReqWarning(false)
{
currentWindow = love::window::sdl::Window::createSingleton();
@@ -161,16 +162,38 @@ bool Graphics::setMode(int width, int height, bool &sRGB)
this->width = width;
this->height = height;
// Okay, setup OpenGL.
gl.initContext();
// Does the system meet LOVE's minimum requirements for graphics?
if (!(GLEE_VERSION_2_0 && Shader::isSupported() && Canvas::isSupported())
&& !displayedMinReqWarning)
{
love::window::MessageBoxType type = love::window::MESSAGEBOX_ERROR;
const char *title = "Minimum system requirements not met!";
std::string message;
message += "Detected OpenGL version: ";
message += (const char *) glGetString(GL_VERSION);
message += "\nRequired OpenGL version: 2.1."; // -ish
message += "\nThe program may crash or have graphical issues.";
::printf("%s\n%s\n", title, message.c_str());
currentWindow->showMessageBox(type, title, message.c_str());
// We should only show the message once, instead of after every setMode.
displayedMinReqWarning = true;
}
// Okay, setup OpenGL.
gl.setupContext();
created = true;
setViewportSize(width, height);
// Make sure antialiasing works when set elsewhere
if (GLEE_VERSION_1_3 || GLEE_ARB_multisample)
glEnable(GL_MULTISAMPLE);
glEnable(GL_MULTISAMPLE);
// Enable blending
glEnable(GL_BLEND);
@@ -184,8 +207,7 @@ bool Graphics::setMode(int width, int height, bool &sRGB)
glHint(GL_POINT_SMOOTH_HINT, GL_NICEST);
// Auto-generated mipmaps should be the best quality possible
if (GLEE_VERSION_1_4 || GLEE_SGIS_generate_mipmap)
glHint(GL_GENERATE_MIPMAP_HINT, GL_NICEST);
glHint(GL_GENERATE_MIPMAP_HINT, GL_NICEST);
// Enable textures
glEnable(GL_TEXTURE_2D);
@@ -609,21 +631,9 @@ void Graphics::setBlendMode(Graphics::BlendMode mode)
switch (mode)
{
case BLEND_ALPHA:
if (GLEE_VERSION_1_4 || GLEE_EXT_blend_func_separate)
{
state.srcRGB = GL_SRC_ALPHA;
state.srcA = GL_ONE;
state.dstRGB = state.dstA = GL_ONE_MINUS_SRC_ALPHA;
}
else
{
// Fallback for OpenGL implementations without support for separate blend functions.
// This will most likely only be used for the Microsoft software renderer and
// since it's still stuck with OpenGL 1.1, the only expected difference is a
// different alpha value when reading back the default framebuffer (newScreenshot).
state.srcRGB = state.srcA = GL_SRC_ALPHA;
state.dstRGB = state.dstA = GL_ONE_MINUS_SRC_ALPHA;
}
state.srcRGB = GL_SRC_ALPHA;
state.srcA = GL_ONE;
state.dstRGB = state.dstA = GL_ONE_MINUS_SRC_ALPHA;
break;
case BLEND_MULTIPLICATIVE:
state.srcRGB = state.srcA = GL_DST_COLOR;
@@ -986,8 +996,10 @@ love::image::ImageData *Graphics::newScreenshot(love::image::Image *image, bool
{
delete[] pixels;
delete[] screenshot;
if (curcanvas)
curcanvas->startGrab(curcanvas->getAttachedCanvases());
throw love::Exception("Out of memory.");
}
@@ -1019,8 +1031,10 @@ love::image::ImageData *Graphics::newScreenshot(love::image::Image *image, bool
catch (love::Exception &)
{
delete[] screenshot;
if (curcanvas)
curcanvas->startGrab(curcanvas->getAttachedCanvases());
throw;
}