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author | Reinhard Tartler <siretart@tauware.de> | 2011-10-10 17:43:39 +0200 |
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committer | Reinhard Tartler <siretart@tauware.de> | 2011-10-10 17:43:39 +0200 |
commit | f4092abdf94af6a99aff944d6264bc1284e8bdd4 (patch) | |
tree | 2ac1c9cc16ceb93edb2c4382c088dac5aeafdf0f /nx-X11/extras/Mesa/src/mesa/drivers/dri/common/drirenderbuffer.c | |
parent | a840692edc9c6d19cd7c057f68e39c7d95eb767d (diff) | |
download | nx-libs-f4092abdf94af6a99aff944d6264bc1284e8bdd4.tar.gz nx-libs-f4092abdf94af6a99aff944d6264bc1284e8bdd4.tar.bz2 nx-libs-f4092abdf94af6a99aff944d6264bc1284e8bdd4.zip |
Imported nx-X11-3.1.0-1.tar.gznx-X11/3.1.0-1
Summary: Imported nx-X11-3.1.0-1.tar.gz
Keywords:
Imported nx-X11-3.1.0-1.tar.gz
into Git repository
Diffstat (limited to 'nx-X11/extras/Mesa/src/mesa/drivers/dri/common/drirenderbuffer.c')
-rw-r--r-- | nx-X11/extras/Mesa/src/mesa/drivers/dri/common/drirenderbuffer.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/nx-X11/extras/Mesa/src/mesa/drivers/dri/common/drirenderbuffer.c b/nx-X11/extras/Mesa/src/mesa/drivers/dri/common/drirenderbuffer.c new file mode 100644 index 000000000..44826958d --- /dev/null +++ b/nx-X11/extras/Mesa/src/mesa/drivers/dri/common/drirenderbuffer.c @@ -0,0 +1,98 @@ + +#include "mtypes.h" +#include "drirenderbuffer.h" +#include "renderbuffer.h" +#include "imports.h" + + +/** + * This will get called when a window is resized. + * Just update width, height and internal format fields for now. + * There's usually no memory allocation above because the present + * DRI drivers use statically-allocated full-screen buffers. + */ +static GLboolean +driRenderbufferStorage(GLcontext *ctx, struct gl_renderbuffer *rb, + GLenum internalFormat, GLuint width, GLuint height) +{ + rb->Width = width; + rb->Height = height; + rb->InternalFormat = internalFormat; + return GL_TRUE; +} + + +/** + * Allocate a new driRenderbuffer object. + * Individual drivers are free to implement different versions of + * this function. + * \param format Either GL_RGBA, GL_DEPTH_COMPONENT16, GL_DEPTH_COMPONENT24, + * GL_DEPTH_COMPONENT32, or GL_STENCIL_INDEX8_EXT (for now). + * \param cpp chars or bytes per pixel + * \param offset start of buffer with respect to framebuffer address + * \param pitch pixels per row + */ +driRenderbuffer * +driNewRenderbuffer(GLenum format, GLint cpp, GLint offset, GLint pitch) +{ + driRenderbuffer *drb; + + assert(format == GL_RGBA || + format == GL_DEPTH_COMPONENT16 || + format == GL_DEPTH_COMPONENT24 || + format == GL_DEPTH_COMPONENT32 || + format == GL_STENCIL_INDEX8_EXT); + + assert(cpp > 0); + assert(pitch > 0); + + drb = _mesa_calloc(sizeof(driRenderbuffer)); + if (drb) { + const GLuint name = 0; + + _mesa_init_renderbuffer(&drb->Base, name); + + /* Make sure we're using a null-valued GetPointer routine */ + assert(drb->Base.GetPointer(NULL, &drb->Base, 0, 0) == NULL); + + drb->Base.InternalFormat = format; + + if (format == GL_RGBA) { + /* Color */ + drb->Base._BaseFormat = GL_RGBA; + drb->Base.DataType = GL_UNSIGNED_BYTE; + } + else if (format == GL_DEPTH_COMPONENT16) { + /* Depth */ + drb->Base._BaseFormat = GL_DEPTH_COMPONENT; + /* we always Get/Put 32-bit Z values */ + drb->Base.DataType = GL_UNSIGNED_INT; + } + else if (format == GL_DEPTH_COMPONENT24) { + /* Depth */ + drb->Base._BaseFormat = GL_DEPTH_COMPONENT; + /* we always Get/Put 32-bit Z values */ + drb->Base.DataType = GL_UNSIGNED_INT; + } + else { + /* Stencil */ + ASSERT(format == GL_STENCIL_INDEX8); + drb->Base._BaseFormat = GL_STENCIL_INDEX; + drb->Base.DataType = GL_UNSIGNED_BYTE; + } + + /* XXX if we were allocating a user-created renderbuffer, we'd have + * to fill in the ComponentSizes[] array too. + */ + + drb->Base.AllocStorage = driRenderbufferStorage; + /* using default Delete function */ + + + /* DRI renderbuffer-specific fields: */ + drb->offset = offset; + drb->pitch = pitch; + drb->cpp = cpp; + } + return drb; +} |