本文整理汇总了C++中PixelBuffer::has_transparency方法的典型用法代码示例。如果您正苦于以下问题：C++ PixelBuffer::has_transparency方法的具体用法？C++ PixelBuffer::has_transparency怎么用？C++ PixelBuffer::has_transparency使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类PixelBuffer的用法示例。
在下文中一共展示了PixelBuffer::has_transparency方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: state_tracker
void GL1TextureProvider::set_texture_image2d(
GLuint target,
PixelBuffer &image,
int level)
{
throw_if_disposed();
GL1TextureStateTracker state_tracker(texture_type, handle);
GLint gl_internal_format;
GLenum gl_pixel_format;
to_opengl_textureformat(image.get_format(), gl_internal_format, gl_pixel_format);
/*
GL_UNPACK_SWAP_BYTES
GL_UNPACK_LSB_FIRST
GL_UNPACK_SKIP_ROWS
GL_UNPACK_SKIP_PIXELS
GL_UNPACK_ROW_LENGTH
GL_UNPACK_ALIGNMENT
GL_UNPACK_IMAGE_HEIGHT
GL_UNPACK_SKIP_IMAGES
*/
// check out if the original texture needs or doesn't need an alpha channel
bool needs_alpha = image.has_transparency();
GLenum format;
GLenum type;
bool conv_needed = !to_opengl_pixelformat(image, format, type);
// also check for the pitch (GL1 can only skip pixels, not bytes)
if (!conv_needed)
{
const int bytesPerPixel = image.get_bytes_per_pixel();
if (image.get_pitch() % bytesPerPixel != 0)
conv_needed = true;
}
// no conversion needed
if (!conv_needed)
{
// Upload to GL1:
// change alignment
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
const int bytesPerPixel = image.get_bytes_per_pixel();
#ifndef __ANDROID__
glPixelStorei(GL_UNPACK_ROW_LENGTH, image.get_pitch() / bytesPerPixel);
glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
#endif
char *data = (char *) image.get_data();
int image_width = image.get_width();
int image_height = image.get_height();
/*
int image_width = 1;
int image_height = 1;
while (image_width < image.get_width()) image_width *= 2;
while (image_height < image.get_height()) image_height *= 2;
*/
glTexImage2D(
target, // target
level, // level
gl_internal_format, // internalformat
image_width, // width
image_height, // height
0, // border
format, // format
type, // type
data); // texels
}
// conversion needed
else
{
bool big_endian = Endian::is_system_big();
PixelBuffer buffer(
image.get_width(), image.get_height(),
needs_alpha ? tf_rgba8 : tf_rgb8);
buffer.set_image(image);
format = needs_alpha ? GL_RGBA : GL_RGB;
// Upload to OpenGL:
// change alignment
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
const int bytesPerPixel = buffer.get_bytes_per_pixel();
#ifndef __ANDROID__
glPixelStorei(GL_UNPACK_ROW_LENGTH, buffer.get_pitch() / bytesPerPixel);
glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
#endif
// upload
glTexImage2D(
target, // target
level, // level
//.........这里部分代码省略.........
示例2: Exception
void GL1TextureProvider::copy_from(GraphicContext &gc, int x, int y, int slice, int level, const PixelBuffer &ximage, const Rect &src_rect)
{
OpenGL::set_active(gc);
PixelBuffer image = ximage;
if (src_rect.left < 0 || src_rect.top < 0 || src_rect.right > image.get_width() || src_rect.bottom > image.get_height())
throw Exception("Rectangle out of bounds");
throw_if_disposed();
GL1TextureStateTracker state_tracker(texture_type, handle);
// check out if the original texture needs or doesn't need an alpha channel
bool needs_alpha = image.has_transparency();
GLenum format;
GLenum type;
bool conv_needed = !to_opengl_pixelformat(image, format, type);
// also check for the pitch (GL1 can only skip pixels, not bytes)
if (!conv_needed)
{
const int bytesPerPixel = image.get_bytes_per_pixel();
if (image.get_pitch() % bytesPerPixel != 0)
conv_needed = true;
}
// no conversion needed
if (!conv_needed)
{
// change alignment
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
const int bytesPerPixel = image.get_bytes_per_pixel();
#ifndef __ANDROID__
glPixelStorei(GL_UNPACK_ROW_LENGTH, image.get_pitch() / bytesPerPixel);
glPixelStorei(GL_UNPACK_SKIP_PIXELS, src_rect.left);
glPixelStorei(GL_UNPACK_SKIP_ROWS, src_rect.top);
#endif
}
// conversion needed
else
{
bool big_endian = Endian::is_system_big();
PixelBuffer buffer(
src_rect.get_width(), src_rect.get_height(),
needs_alpha ? tf_rgba8 : tf_rgb8);
buffer.set_subimage(image, Point(0, 0), src_rect);
format = needs_alpha ? GL_RGBA : GL_RGB;
// Upload to GL1:
glBindTexture(GL_TEXTURE_2D, handle);
// change alignment
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
const int bytesPerPixel = buffer.get_bytes_per_pixel();
#ifndef __ANDROID__
glPixelStorei(GL_UNPACK_ROW_LENGTH, buffer.get_pitch() / bytesPerPixel);
glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
#endif
type = GL_UNSIGNED_BYTE;
image = buffer;
}
// upload
glTexSubImage2D(
GL_TEXTURE_2D, // target
level, // level
x, y, // xoffset, yoffset
src_rect.get_width(), // width
src_rect.get_height(), // height
format, // format
type, // type
image.get_data()); // texels
if (!power_of_two_texture)
{
// TODO: This needs corrected.It should be optimised and currently it does not write to the lower right quadrant
// Check extend the right edge
int right_edge = x + image.get_width();
if ( right_edge >= width )
{
char *edge_data = (char *) image.get_data();
edge_data += image.get_bytes_per_pixel() * (width-1);
for(int edge_cnt = right_edge; edge_cnt < pot_width; edge_cnt++)
{
glTexSubImage2D(
GL_TEXTURE_2D, // target
level, // level
edge_cnt, y, // xoffset, yoffset
1, // width
src_rect.get_height(), // height
format, // format
//.........这里部分代码省略.........