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Diffstat (limited to 'src/mesa/drivers/dri/common/drirenderbuffer.c')
-rw-r--r--src/mesa/drivers/dri/common/drirenderbuffer.c215
1 files changed, 215 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/common/drirenderbuffer.c b/src/mesa/drivers/dri/common/drirenderbuffer.c
new file mode 100644
index 0000000..2e47781
--- /dev/null
+++ b/src/mesa/drivers/dri/common/drirenderbuffer.c
@@ -0,0 +1,215 @@
+
+#include "mtypes.h"
+#include "drirenderbuffer.h"
+#include "framebuffer.h"
+#include "renderbuffer.h"
+#include "imports.h"
+
+
+/**
+ * This will get called when a window (gl_framebuffer) is resized (probably
+ * via driUpdateFramebufferSize(), below).
+ * 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. If that's not
+ * the case for a DRI driver, a different AllocStorage method should
+ * be used.
+ */
+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;
+}
+
+
+static void
+driDeleteRenderbuffer(struct gl_renderbuffer *rb)
+{
+ /* don't free rb->Data Chances are it's a memory mapped region for
+ * the dri drivers.
+ */
+ _mesa_free(rb);
+}
+
+
+/**
+ * Allocate a new driRenderbuffer object.
+ * Individual drivers are free to implement different versions of
+ * this function.
+ *
+ * At this time, this function can only be used for window-system
+ * renderbuffers, not user-created RBOs.
+ *
+ * \param format Either GL_RGBA, GL_DEPTH_COMPONENT16, GL_DEPTH_COMPONENT24,
+ * GL_DEPTH_COMPONENT32, or GL_STENCIL_INDEX8_EXT (for now).
+ * \param addr address in main memory of the buffer. Probably a memory
+ * mapped region.
+ * \param cpp chars or bytes per pixel
+ * \param offset start of renderbuffer with respect to start of framebuffer
+ * \param pitch pixels per row
+ */
+driRenderbuffer *
+driNewRenderbuffer(GLenum format, GLvoid *addr,
+ GLint cpp, GLint offset, GLint pitch,
+ __DRIdrawablePrivate *dPriv)
+{
+ driRenderbuffer *drb;
+
+ assert(format == GL_RGBA ||
+ format == GL_RGB5 ||
+ format == GL_RGBA8 ||
+ 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 || format == GL_RGB5 || format == GL_RGBA8) {
+ /* Color */
+ drb->Base._BaseFormat = GL_RGBA;
+ drb->Base.DataType = GL_UNSIGNED_BYTE;
+ if (format == GL_RGB5) {
+ drb->Base.RedBits = 5;
+ drb->Base.GreenBits = 6;
+ drb->Base.BlueBits = 5;
+ }
+ else {
+ drb->Base.RedBits =
+ drb->Base.GreenBits =
+ drb->Base.BlueBits =
+ drb->Base.AlphaBits = 8;
+ }
+ }
+ 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;
+ drb->Base.DepthBits = 16;
+ }
+ 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;
+ drb->Base.DepthBits = 24;
+ }
+ else if (format == GL_DEPTH_COMPONENT32) {
+ /* Depth */
+ drb->Base._BaseFormat = GL_DEPTH_COMPONENT;
+ /* we always Get/Put 32-bit Z values */
+ drb->Base.DataType = GL_UNSIGNED_INT;
+ drb->Base.DepthBits = 32;
+ }
+ else {
+ /* Stencil */
+ ASSERT(format == GL_STENCIL_INDEX8_EXT);
+ drb->Base._BaseFormat = GL_STENCIL_INDEX;
+ drb->Base.DataType = GL_UNSIGNED_BYTE;
+ drb->Base.StencilBits = 8;
+ }
+
+ /* XXX if we were allocating a user-created renderbuffer, we'd have
+ * to fill in the Red/Green/Blue/.../Bits values too.
+ */
+
+ drb->Base.AllocStorage = driRenderbufferStorage;
+ drb->Base.Delete = driDeleteRenderbuffer;
+
+ drb->Base.Data = addr;
+
+ /* DRI renderbuffer-specific fields: */
+ drb->dPriv = dPriv;
+ drb->offset = offset;
+ drb->pitch = pitch;
+ drb->cpp = cpp;
+
+ /* may be changed if page flipping is active: */
+ drb->flippedOffset = offset;
+ drb->flippedPitch = pitch;
+ drb->flippedData = addr;
+ }
+ return drb;
+}
+
+
+/**
+ * Update the front and back renderbuffers' flippedPitch/Offset/Data fields.
+ * If stereo, flip both the left and right pairs.
+ * This is used when we do double buffering via page flipping.
+ * \param fb the framebuffer we're page flipping
+ * \param flipped if true, set flipped values, else set non-flipped values
+ */
+void
+driFlipRenderbuffers(struct gl_framebuffer *fb, GLboolean flipped)
+{
+ const GLuint count = fb->Visual.stereoMode ? 2 : 1;
+ GLuint lr; /* left or right */
+
+ /* we shouldn't really call this function if single-buffered, but
+ * play it safe.
+ */
+ if (!fb->Visual.doubleBufferMode)
+ return;
+
+ for (lr = 0; lr < count; lr++) {
+ GLuint frontBuf = (lr == 0) ? BUFFER_FRONT_LEFT : BUFFER_FRONT_RIGHT;
+ GLuint backBuf = (lr == 0) ? BUFFER_BACK_LEFT : BUFFER_BACK_RIGHT;
+ driRenderbuffer *front_drb
+ = (driRenderbuffer *) fb->Attachment[frontBuf].Renderbuffer;
+ driRenderbuffer *back_drb
+ = (driRenderbuffer *) fb->Attachment[backBuf].Renderbuffer;
+
+ if (flipped) {
+ front_drb->flippedOffset = back_drb->offset;
+ front_drb->flippedPitch = back_drb->pitch;
+ front_drb->flippedData = back_drb->Base.Data;
+ back_drb->flippedOffset = front_drb->offset;
+ back_drb->flippedPitch = front_drb->pitch;
+ back_drb->flippedData = front_drb->Base.Data;
+ }
+ else {
+ front_drb->flippedOffset = front_drb->offset;
+ front_drb->flippedPitch = front_drb->pitch;
+ front_drb->flippedData = front_drb->Base.Data;
+ back_drb->flippedOffset = back_drb->offset;
+ back_drb->flippedPitch = back_drb->pitch;
+ back_drb->flippedData = back_drb->Base.Data;
+ }
+ }
+}
+
+
+/**
+ * Check that the gl_framebuffer associated with dPriv is the right size.
+ * Resize the gl_framebuffer if needed.
+ * It's expected that the dPriv->driverPrivate member points to a
+ * gl_framebuffer object.
+ */
+void
+driUpdateFramebufferSize(GLcontext *ctx, const __DRIdrawablePrivate *dPriv)
+{
+ struct gl_framebuffer *fb = (struct gl_framebuffer *) dPriv->driverPrivate;
+ if (fb && (dPriv->w != fb->Width || dPriv->h != fb->Height)) {
+ _mesa_resize_framebuffer(ctx, fb, dPriv->w, dPriv->h);
+ assert(fb->Width == dPriv->w);
+ assert(fb->Height == dPriv->h);
+ }
+}