#include "context.h"
#include "enums.h"
#include "fbobject.h"
-#include "state.h"
+#include "mtypes.h"
#define BAD_MASK ~0u
* \return bitmask of BUFFER_BIT_* flags
*/
static GLbitfield
-supported_buffer_bitmask(const GLcontext *ctx, const struct gl_framebuffer *fb)
+supported_buffer_bitmask(const struct gl_context *ctx,
+ const struct gl_framebuffer *fb)
{
GLbitfield mask = 0x0;
- if (fb->Name > 0) {
+ if (_mesa_is_user_fbo(fb)) {
/* A user-created renderbuffer */
GLuint i;
ASSERT(ctx->Extensions.EXT_framebuffer_object);
* Called by glDrawBuffer().
* Specify which renderbuffer(s) to draw into for the first color output.
* <buffer> can name zero, one, two or four renderbuffers!
- * \sa _mesa_DrawBuffersARB
+ * \sa _mesa_DrawBuffers
*
* \param buffer buffer token such as GL_LEFT or GL_FRONT_AND_BACK, etc.
*
destMask = draw_buffer_enum_to_bitmask(buffer);
if (destMask == BAD_MASK) {
/* totally bogus buffer */
- _mesa_error(ctx, GL_INVALID_ENUM, "glDrawBuffer(buffer=0x%x)", buffer);
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glDrawBuffer(buffer=0x%x)", buffer);
return;
}
destMask &= supportedMask;
* GL_FRONT_AND_BACK is illegal.
*/
void GLAPIENTRY
-_mesa_DrawBuffersARB(GLsizei n, const GLenum *buffers)
+_mesa_DrawBuffers(GLsizei n, const GLenum *buffers)
{
GLint output;
GLbitfield usedBufferMask, supportedMask;
if (ctx->Driver.DrawBuffers)
ctx->Driver.DrawBuffers(ctx, n, buffers);
else if (ctx->Driver.DrawBuffer)
- ctx->Driver.DrawBuffer(ctx, n>0? buffers[0]:GL_NONE);
+ ctx->Driver.DrawBuffer(ctx, n > 0 ? buffers[0] : GL_NONE);
+}
+
+
+/**
+ * Performs necessary state updates when _mesa_drawbuffers makes an
+ * actual change.
+ */
+static void
+updated_drawbuffers(struct gl_context *ctx)
+{
+ FLUSH_VERTICES(ctx, _NEW_BUFFERS);
+
+ if (ctx->API == API_OPENGL_COMPAT && !ctx->Extensions.ARB_ES2_compatibility) {
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
+
+ /* Flag the FBO as requiring validation. */
+ if (_mesa_is_user_fbo(fb)) {
+ fb->_Status = 0;
+ }
+ }
}
/**
* Helper function to set the GL_DRAW_BUFFER state in the context and
- * current FBO.
+ * current FBO. Called via glDrawBuffer(), glDrawBuffersARB()
*
* All error checking will have been done prior to calling this function
* so nothing should go wrong at this point.
* BUFFER_BIT_FRONT_LEFT | BUFFER_BIT_BACK_LEFT).
*/
void
-_mesa_drawbuffers(GLcontext *ctx, GLuint n, const GLenum *buffers,
+_mesa_drawbuffers(struct gl_context *ctx, GLuint n, const GLenum *buffers,
const GLbitfield *destMask)
{
struct gl_framebuffer *fb = ctx->DrawBuffer;
GLbitfield mask[MAX_DRAW_BUFFERS];
+ GLuint buf;
if (!destMask) {
/* compute destMask values now */
destMask = mask;
}
+ /*
+ * If n==1, destMask[0] may have up to four bits set.
+ * Otherwise, destMask[x] can only have one bit set.
+ */
if (n == 1) {
- GLuint buf, count = 0;
- /* init to -1 to help catch errors */
- fb->_ColorDrawBufferIndexes[0] = -1;
- for (buf = 0; buf < BUFFER_COUNT; buf++) {
- if (destMask[0] & (1 << buf)) {
- fb->_ColorDrawBufferIndexes[count] = buf;
- count++;
+ GLuint count = 0, destMask0 = destMask[0];
+ while (destMask0) {
+ GLint bufIndex = ffs(destMask0) - 1;
+ if (fb->_ColorDrawBufferIndexes[count] != bufIndex) {
+ updated_drawbuffers(ctx);
+ fb->_ColorDrawBufferIndexes[count] = bufIndex;
}
+ count++;
+ destMask0 &= ~(1 << bufIndex);
}
fb->ColorDrawBuffer[0] = buffers[0];
fb->_NumColorDrawBuffers = count;
}
else {
- GLuint buf, count = 0;
+ GLuint count = 0;
for (buf = 0; buf < n; buf++ ) {
if (destMask[buf]) {
- fb->_ColorDrawBufferIndexes[buf] = _mesa_ffs(destMask[buf]) - 1;
- fb->ColorDrawBuffer[buf] = buffers[buf];
+ GLint bufIndex = ffs(destMask[buf]) - 1;
+ /* only one bit should be set in the destMask[buf] field */
+ ASSERT(_mesa_bitcount(destMask[buf]) == 1);
+ if (fb->_ColorDrawBufferIndexes[buf] != bufIndex) {
+ updated_drawbuffers(ctx);
+ fb->_ColorDrawBufferIndexes[buf] = bufIndex;
+ }
count = buf + 1;
}
else {
- fb->_ColorDrawBufferIndexes[buf] = -1;
+ if (fb->_ColorDrawBufferIndexes[buf] != -1) {
+ updated_drawbuffers(ctx);
+ fb->_ColorDrawBufferIndexes[buf] = -1;
+ }
}
+ fb->ColorDrawBuffer[buf] = buffers[buf];
}
- /* set remaining outputs to -1 (GL_NONE) */
- while (buf < ctx->Const.MaxDrawBuffers) {
+ fb->_NumColorDrawBuffers = count;
+ }
+
+ /* set remaining outputs to -1 (GL_NONE) */
+ for (buf = fb->_NumColorDrawBuffers; buf < ctx->Const.MaxDrawBuffers; buf++) {
+ if (fb->_ColorDrawBufferIndexes[buf] != -1) {
+ updated_drawbuffers(ctx);
fb->_ColorDrawBufferIndexes[buf] = -1;
- fb->ColorDrawBuffer[buf] = GL_NONE;
- buf++;
}
- fb->_NumColorDrawBuffers = count;
+ }
+ for (buf = n; buf < ctx->Const.MaxDrawBuffers; buf++) {
+ fb->ColorDrawBuffer[buf] = GL_NONE;
}
- if (fb->Name == 0) {
+ if (_mesa_is_winsys_fbo(fb)) {
/* also set context drawbuffer state */
- GLuint buf;
for (buf = 0; buf < ctx->Const.MaxDrawBuffers; buf++) {
- ctx->Color.DrawBuffer[buf] = fb->ColorDrawBuffer[buf];
+ if (ctx->Color.DrawBuffer[buf] != fb->ColorDrawBuffer[buf]) {
+ updated_drawbuffers(ctx);
+ ctx->Color.DrawBuffer[buf] = fb->ColorDrawBuffer[buf];
+ }
}
}
+}
- ctx->NewState |= _NEW_BUFFERS;
+
+/**
+ * Update the current drawbuffer's _ColorDrawBufferIndex[] list, etc.
+ * from the context's Color.DrawBuffer[] state.
+ * Use when changing contexts.
+ */
+void
+_mesa_update_draw_buffers(struct gl_context *ctx)
+{
+ GLenum buffers[MAX_DRAW_BUFFERS];
+ GLuint i;
+
+ /* should be a window system FBO */
+ assert(_mesa_is_winsys_fbo(ctx->DrawBuffer));
+
+ for (i = 0; i < ctx->Const.MaxDrawBuffers; i++)
+ buffers[i] = ctx->Color.DrawBuffer[i];
+
+ _mesa_drawbuffers(ctx, ctx->Const.MaxDrawBuffers, buffers, NULL);
}
* \param bufferIndex the numerical index corresponding to 'buffer'
*/
void
-_mesa_readbuffer(GLcontext *ctx, GLenum buffer, GLint bufferIndex)
+_mesa_readbuffer(struct gl_context *ctx, GLenum buffer, GLint bufferIndex)
{
struct gl_framebuffer *fb = ctx->ReadBuffer;
- if (fb->Name == 0) {
+ if (_mesa_is_winsys_fbo(fb)) {
/* Only update the per-context READ_BUFFER state if we're bound to
* a window-system framebuffer.
*/
if (MESA_VERBOSE & VERBOSE_API)
_mesa_debug(ctx, "glReadBuffer %s\n", _mesa_lookup_enum_by_nr(buffer));
- if (fb->Name > 0 && buffer == GL_NONE) {
- /* This is legal for user-created framebuffer objects */
+ if (buffer == GL_NONE) {
+ /* This is legal--it means that no buffer should be bound for reading. */
srcBuffer = -1;
}
else {
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