suzanne.soy/solvespace
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Update 819c4c5 for Wine compatibility.

Browse Source 
For some reason glGetString(GL_VERSION) can return NULL at least
once even after we've started rendering.
This commit is contained in:
whitequark 2016-10-09 21:22:45 +00:00
parent 819c4c5742
commit fbd89a7e30
1 changed files with 36 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

64
src/render/rendergl1.cpp
View File

@ -20,6 +20,39 @@
namespace SolveSpace {
//-----------------------------------------------------------------------------
// Checks for buggy OpenGL renderers
//-----------------------------------------------------------------------------
// Intel GPUs with Mesa on *nix render thin lines poorly.
static bool HasIntelThinLineQuirk()
{
static bool quirkChecked, quirkEnabled;
if(!quirkChecked) {
const char *ident = (const char*)glGetString(GL_VENDOR);
if(ident != NULL) {
quirkChecked = true;
quirkEnabled = !strcmp(ident, "Intel Open Source Technology Center");
}
}
return quirkEnabled;
}
// The default Windows GL renderer really does implement GL 1.1,
// and cannot handle non-power-of-2 textures, which is legal.
static bool HasGl1V1Quirk()
{
static bool quirkChecked, quirkEnabled;
if(!quirkChecked) {
const char *ident = (const char*)glGetString(GL_VERSION);
if(ident != NULL) {
quirkChecked = true;
quirkEnabled = !strcmp(ident, "1.1.0");
}
}
return quirkEnabled;
}
//-----------------------------------------------------------------------------
// Thin wrappers around OpenGL functions to fix bugs, adapt them to our
// data structures, etc.
@ -34,18 +67,7 @@ static inline void ssglVertex3v(Vector v) {
}
void ssglLineWidth(double width) {
// Intel GPUs with Mesa on *nix render thin lines poorly.
static bool workaroundChecked, workaroundEnabled;
if(!workaroundChecked) {
// ssglLineWidth can be called before GL is initialized
if(glGetString(GL_VENDOR)) {
workaroundChecked = true;
if(!strcmp((char*)glGetString(GL_VENDOR), "Intel Open Source Technology Center"))
workaroundEnabled = true;
}
}
if(workaroundEnabled && width < 1.6)
if(HasIntelThinLineQuirk() && width < 1.6)
width = 1.6;
glLineWidth((GLfloat)width);
@ -212,20 +234,6 @@ static int RoundUpToPowerOfTwo(int v)
return 0;
}
static bool NeedsGl1V1Workaround()
{
static bool didGlVersionCheck, needsGl1V1Workaround;
if(!didGlVersionCheck) {
didGlVersionCheck = true;
if(!strcmp((const char*) glGetString(GL_VERSION), "1.1.0")) {
// The default Windows GL renderer really does implement GL 1.1,
// and cannot handle non-power-of-2 textures, which is legal.
needsGl1V1Workaround = true;
}
}
return needsGl1V1Workaround;
}
void OpenGl1Renderer::SelectTexture(std::shared_ptr<const Pixmap> pm) {
if(current.texture.lock() == pm) return;
@ -246,7 +254,7 @@ void OpenGl1Renderer::SelectTexture(std::shared_ptr<const Pixmap> pm) {
ssassert(false, "Unexpected pixmap format");
}
if(!NeedsGl1V1Workaround()) {
if(!HasGl1V1Quirk()) {
glTexImage2D(GL_TEXTURE_2D, 0, format, pm->width, pm->height, 0,
format, GL_UNSIGNED_BYTE, &pm->data[0]);
} else {
@ -641,7 +649,7 @@ void OpenGl1Renderer::DrawPixmap(std::shared_ptr<const Pixmap> pm,
const Point2d &ta, const Point2d &tb, hFill hcf) {
double xfactor = 1.0,
yfactor = 1.0;
if(NeedsGl1V1Workaround()) {
if(HasGl1V1Quirk()) {
xfactor = (double)pm->width / RoundUpToPowerOfTwo(pm->width);
yfactor = (double)pm->height / RoundUpToPowerOfTwo(pm->height);
}