diff options
Diffstat (limited to 'src/mesa/drivers/dri/common/drirenderbuffer.c')
| -rw-r--r-- | src/mesa/drivers/dri/common/drirenderbuffer.c | 200 |
1 files changed, 200 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 0000000000..c9ce6e3cb6 --- /dev/null +++ b/src/mesa/drivers/dri/common/drirenderbuffer.c @@ -0,0 +1,200 @@ + +#include "main/mtypes.h" +#include "main/formats.h" +#include "main/renderbuffer.h" +#include "main/imports.h" +#include "drirenderbuffer.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. + */ + 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(gl_format format, GLvoid *addr, + GLint cpp, GLint offset, GLint pitch, + __DRIdrawable *dPriv) +{ + driRenderbuffer *drb; + + assert(cpp > 0); + assert(pitch > 0); + + drb = calloc(1, 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); + + switch (format) { + case MESA_FORMAT_ARGB8888: + if (cpp == 2) { + /* override format */ + format = MESA_FORMAT_RGB565; + } + drb->Base.DataType = GL_UNSIGNED_BYTE; + break; + case MESA_FORMAT_Z16: + /* Depth */ + /* we always Get/Put 32-bit Z values */ + drb->Base.DataType = GL_UNSIGNED_INT; + assert(cpp == 2); + break; + case MESA_FORMAT_Z32: + /* Depth */ + /* we always Get/Put 32-bit Z values */ + drb->Base.DataType = GL_UNSIGNED_INT; + assert(cpp == 4); + break; + case MESA_FORMAT_Z24_S8: + drb->Base.DataType = GL_UNSIGNED_INT_24_8_EXT; + assert(cpp == 4); + break; + case MESA_FORMAT_S8_Z24: + drb->Base.DataType = GL_UNSIGNED_INT_24_8_EXT; + assert(cpp == 4); + break; + case MESA_FORMAT_S8: + /* Stencil */ + drb->Base.DataType = GL_UNSIGNED_BYTE; + break; + default: + _mesa_problem(NULL, "Bad format 0x%x in driNewRenderbuffer", format); + return NULL; + } + + drb->Base.Format = format; + + drb->Base.InternalFormat = + drb->Base._BaseFormat = _mesa_get_format_base_format(format); + + 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 __DRIdrawable *dPriv) +{ + struct gl_framebuffer *fb = (struct gl_framebuffer *) dPriv->driverPrivate; + if (fb && (dPriv->w != fb->Width || dPriv->h != fb->Height)) { + ctx->Driver.ResizeBuffers(ctx, fb, dPriv->w, dPriv->h); + /* if the driver needs the hw lock for ResizeBuffers, the drawable + might have changed again by now */ + assert(fb->Width == dPriv->w); + assert(fb->Height == dPriv->h); + } +} |