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don't crash on loading large textures

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This commit is contained in:
David Rose 2002-02-27 15:39:39 +00:00
parent a7b3679165
commit 407cc9595c
1 changed files with 22 additions and 10 deletions
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32
panda/src/glgsg/glGraphicsStateGuardian.cxx
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@ -3928,14 +3928,17 @@ apply_texture_immediate(Texture *tex) {
GLenum type = get_image_type(pb->get_image_type());
uchar *image = pb->_image;
uchar *locally_allocated_image = (uchar *)NULL;
if (!gl_supports_bgr) {
// If the GL doesn't claim to support BGR, we may have to reverse
// the byte ordering of the image.
if (external_format == GL_RGB && pb->get_image_type() == PixelBuffer::T_unsigned_byte) {
image = (uchar *)alloca(num_pixels * 3);
locally_allocated_image = new uchar[num_pixels * 3];
image = locally_allocated_image;
uchar_bgr_to_rgb(image, pb->_image, num_pixels);
} else if (external_format == GL_RGBA && pb->get_image_type() == PixelBuffer::T_unsigned_byte) {
image = (uchar *)alloca(num_pixels * 4);
locally_allocated_image = new uchar[num_pixels * 4];
image = locally_allocated_image;
uchar_bgra_to_rgba(image, pb->_image, num_pixels);
}
}
@ -3963,18 +3966,23 @@ apply_texture_immediate(Texture *tex) {
#ifndef NDEBUG
if (gl_show_mipmaps) {
build_phony_mipmaps(tex);
return true;
}
} else
#endif
gluBuild2DMipmaps(GL_TEXTURE_2D, internal_format,
xsize, ysize,
external_format, type, image);
{
gluBuild2DMipmaps(GL_TEXTURE_2D, internal_format,
xsize, ysize,
external_format, type, image);
#ifndef NDEBUG
if (gl_save_mipmaps) {
save_mipmap_images(tex);
}
if (gl_save_mipmaps) {
save_mipmap_images(tex);
}
#endif
}
report_errors();
if (locally_allocated_image != (uchar *)NULL) {
delete[] locally_allocated_image;
}
return true;
}
}
@ -3984,6 +3992,10 @@ apply_texture_immediate(Texture *tex) {
xsize, ysize, pb->get_border(),
external_format, type, image);
report_errors();
if (locally_allocated_image != (uchar *)NULL) {
delete[] locally_allocated_image;
}
return true;
}