Adjust the vertices to be over the texel center.

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%404195

src/video/SDL_glfuncs.h

@@ -422,9 +422,9 @@ SDL_PROC_UNUSED(void, glTranslated, (GLdouble x, GLdouble y, GLdouble z))
 SDL_PROC_UNUSED(void, glTranslatef, (GLfloat x, GLfloat y, GLfloat z))
 SDL_PROC_UNUSED(void, glVertex2d, (GLdouble x, GLdouble y))
 SDL_PROC_UNUSED(void, glVertex2dv, (const GLdouble * v))
-SDL_PROC_UNUSED(void, glVertex2f, (GLfloat x, GLfloat y))
+SDL_PROC(void, glVertex2f, (GLfloat x, GLfloat y))
 SDL_PROC_UNUSED(void, glVertex2fv, (const GLfloat * v))
-SDL_PROC(void, glVertex2i, (GLint x, GLint y))
+SDL_PROC_UNUSED(void, glVertex2i, (GLint x, GLint y))
 SDL_PROC_UNUSED(void, glVertex2iv, (const GLint * v))
 SDL_PROC_UNUSED(void, glVertex2s, (GLshort x, GLshort y))
 SDL_PROC_UNUSED(void, glVertex2sv, (const GLshort * v))

src/video/SDL_renderer_gl.c

@@ -1105,7 +1105,7 @@ GL_RenderPoint(SDL_Renderer * renderer, int x, int y)
                     (GLfloat) renderer->a * inv255f);
 
     data->glBegin(GL_POINTS);
-    data->glVertex2i(x, y);
+    data->glVertex2f(0.5f + x, 0.5f + y);
     data->glEnd();
 
     return 0;
@@ -1124,8 +1124,8 @@ GL_RenderLine(SDL_Renderer * renderer, int x1, int y1, int x2, int y2)
                     (GLfloat) renderer->a * inv255f);
 
     data->glBegin(GL_LINES);
-    data->glVertex2i(x1, y1);
-    data->glVertex2i(x2, y2);
+    data->glVertex2f(0.5f + x1, 0.5f + y1);
+    data->glVertex2f(0.5f + x2, 0.5f + y2);
     data->glEnd();
 
     return 0;
@@ -1234,13 +1234,13 @@ GL_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
 
     data->glBegin(GL_TRIANGLE_STRIP);
     data->glTexCoord2f(minu, minv);
-    data->glVertex2i(minx, miny);
+    data->glVertex2f(0.5f + minx, 0.5f + miny);
     data->glTexCoord2f(maxu, minv);
-    data->glVertex2i(maxx, miny);
+    data->glVertex2f(0.5f + maxx, 0.5f + miny);
     data->glTexCoord2f(minu, maxv);
-    data->glVertex2i(minx, maxy);
+    data->glVertex2f(0.5f + minx, 0.5f + maxy);
     data->glTexCoord2f(maxu, maxv);
-    data->glVertex2i(maxx, maxy);
+    data->glVertex2f(0.5f + maxx, 0.5f + maxy);
     data->glEnd();
 
     if (texturedata->shader != 0) {