diff options
Diffstat (limited to 'mesalib/src/mesa/main/viewport.c')
| -rw-r--r-- | mesalib/src/mesa/main/viewport.c | 347 |
1 files changed, 292 insertions, 55 deletions
diff --git a/mesalib/src/mesa/main/viewport.c b/mesalib/src/mesa/main/viewport.c index 3aaab2d46..6545bf68a 100644 --- a/mesalib/src/mesa/main/viewport.c +++ b/mesalib/src/mesa/main/viewport.c @@ -34,6 +34,60 @@ #include "mtypes.h" #include "viewport.h" +static void +set_viewport_no_notify(struct gl_context *ctx, unsigned idx, + GLfloat x, GLfloat y, + GLfloat width, GLfloat height) +{ + /* clamp width and height to the implementation dependent range */ + width = MIN2(width, (GLfloat) ctx->Const.MaxViewportWidth); + height = MIN2(height, (GLfloat) ctx->Const.MaxViewportHeight); + + /* The GL_ARB_viewport_array spec says: + * + * "The location of the viewport's bottom-left corner, given by (x,y), + * are clamped to be within the implementation-dependent viewport + * bounds range. The viewport bounds range [min, max] tuple may be + * determined by calling GetFloatv with the symbolic constant + * VIEWPORT_BOUNDS_RANGE (see section 6.1)." + */ + if (ctx->Extensions.ARB_viewport_array) { + x = CLAMP(x, + ctx->Const.ViewportBounds.Min, ctx->Const.ViewportBounds.Max); + y = CLAMP(y, + ctx->Const.ViewportBounds.Min, ctx->Const.ViewportBounds.Max); + } + + ctx->ViewportArray[idx].X = x; + ctx->ViewportArray[idx].Width = width; + ctx->ViewportArray[idx].Y = y; + ctx->ViewportArray[idx].Height = height; + ctx->NewState |= _NEW_VIEWPORT; + +#if 1 + /* XXX remove this someday. Currently the DRI drivers rely on + * the WindowMap matrix being up to date in the driver's Viewport + * and DepthRange functions. + */ + _math_matrix_viewport(&ctx->ViewportArray[idx]._WindowMap, + ctx->ViewportArray[idx].X, + ctx->ViewportArray[idx].Y, + ctx->ViewportArray[idx].Width, + ctx->ViewportArray[idx].Height, + ctx->ViewportArray[idx].Near, + ctx->ViewportArray[idx].Far, + ctx->DrawBuffer->_DepthMaxF); +#endif +} + +struct gl_viewport_inputs { + GLfloat X, Y; /**< position */ + GLfloat Width, Height; /**< size */ +}; + +struct gl_depthrange_inputs { + GLdouble Near, Far; /**< Depth buffer range */ +}; /** * Set the viewport. @@ -45,9 +99,39 @@ void GLAPIENTRY _mesa_Viewport(GLint x, GLint y, GLsizei width, GLsizei height) { + unsigned i; GET_CURRENT_CONTEXT(ctx); FLUSH_VERTICES(ctx, 0); - _mesa_set_viewport(ctx, x, y, width, height); + + if (MESA_VERBOSE & VERBOSE_API) + _mesa_debug(ctx, "glViewport %d %d %d %d\n", x, y, width, height); + + if (width < 0 || height < 0) { + _mesa_error(ctx, GL_INVALID_VALUE, + "glViewport(%d, %d, %d, %d)", x, y, width, height); + return; + } + + /* The GL_ARB_viewport_array spec says: + * + * "Viewport sets the parameters for all viewports to the same values + * and is equivalent (assuming no errors are generated) to: + * + * for (uint i = 0; i < MAX_VIEWPORTS; i++) + * ViewportIndexedf(i, 1, (float)x, (float)y, (float)w, (float)h);" + * + * Set all of the viewports supported by the implementation, but only + * signal the driver once at the end. + */ + for (i = 0; i < ctx->Const.MaxViewports; i++) + set_viewport_no_notify(ctx, i, x, y, width, height); + + if (ctx->Driver.Viewport) { + /* Many drivers will use this call to check for window size changes + * and reallocate the z/stencil/accum/etc buffers if needed. + */ + ctx->Driver.Viewport(ctx); + } } @@ -56,31 +140,114 @@ _mesa_Viewport(GLint x, GLint y, GLsizei width, GLsizei height) * matrix). Usually called from _mesa_Viewport(). * * \param ctx GL context. + * \param idx Index of the viewport to be updated. * \param x, y coordinates of the lower left corner of the viewport rectangle. * \param width width of the viewport rectangle. * \param height height of the viewport rectangle. */ void -_mesa_set_viewport(struct gl_context *ctx, GLint x, GLint y, - GLsizei width, GLsizei height) +_mesa_set_viewport(struct gl_context *ctx, unsigned idx, GLfloat x, GLfloat y, + GLfloat width, GLfloat height) { + set_viewport_no_notify(ctx, idx, x, y, width, height); + + if (ctx->Driver.Viewport) { + /* Many drivers will use this call to check for window size changes + * and reallocate the z/stencil/accum/etc buffers if needed. + */ + ctx->Driver.Viewport(ctx); + } +} + +void GLAPIENTRY +_mesa_ViewportArrayv(GLuint first, GLsizei count, const GLfloat *v) +{ + int i; + const struct gl_viewport_inputs *const p = (struct gl_viewport_inputs *) v; + GET_CURRENT_CONTEXT(ctx); + if (MESA_VERBOSE & VERBOSE_API) - _mesa_debug(ctx, "glViewport %d %d %d %d\n", x, y, width, height); + _mesa_debug(ctx, "glViewportArrayv %d %d\n", first, count); - if (width < 0 || height < 0) { - _mesa_error(ctx, GL_INVALID_VALUE, - "glViewport(%d, %d, %d, %d)", x, y, width, height); + if ((first + count) > ctx->Const.MaxViewports) { + _mesa_error(ctx, GL_INVALID_VALUE, + "glViewportArrayv: first (%d) + count (%d) > MaxViewports " + "(%d)", + first, count, ctx->Const.MaxViewports); return; } - /* clamp width and height to the implementation dependent range */ - width = MIN2(width, (GLsizei) ctx->Const.MaxViewportWidth); - height = MIN2(height, (GLsizei) ctx->Const.MaxViewportHeight); + /* Verify width & height */ + for (i = 0; i < count; i++) { + if (p[i].Width < 0 || p[i].Height < 0) { + _mesa_error(ctx, GL_INVALID_VALUE, + "glViewportArrayv: index (%d) width or height < 0 " + "(%f, %f)", + i + first, p[i].Width, p[i].Height); + return; + } + } + + for (i = 0; i < count; i++) + set_viewport_no_notify(ctx, i + first, + p[i].X, p[i].Y, + p[i].Width, p[i].Height); + + if (ctx->Driver.Viewport) + ctx->Driver.Viewport(ctx); +} - ctx->Viewport.X = x; - ctx->Viewport.Width = width; - ctx->Viewport.Y = y; - ctx->Viewport.Height = height; +static void +ViewportIndexedf(GLuint index, GLfloat x, GLfloat y, + GLfloat w, GLfloat h, const char *function) +{ + GET_CURRENT_CONTEXT(ctx); + + if (MESA_VERBOSE & VERBOSE_API) + _mesa_debug(ctx, "%s(%d, %f, %f, %f, %f)\n", + function, index, x, y, w, h); + + if (index >= ctx->Const.MaxViewports) { + _mesa_error(ctx, GL_INVALID_VALUE, + "%s: index (%d) >= MaxViewports (%d)", + function, index, ctx->Const.MaxViewports); + return; + } + + /* Verify width & height */ + if (w < 0 || h < 0) { + _mesa_error(ctx, GL_INVALID_VALUE, + "%s: index (%d) width or height < 0 (%f, %f)", + function, index, w, h); + return; + } + + _mesa_set_viewport(ctx, index, x, y, w, h); +} + +void GLAPIENTRY +_mesa_ViewportIndexedf(GLuint index, GLfloat x, GLfloat y, + GLfloat w, GLfloat h) +{ + ViewportIndexedf(index, x, y, w, h, "glViewportIndexedf"); +} + +void GLAPIENTRY +_mesa_ViewportIndexedfv(GLuint index, const GLfloat *v) +{ + ViewportIndexedf(index, v[0], v[1], v[2], v[3], "glViewportIndexedfv"); +} + +static void +set_depth_range_no_notify(struct gl_context *ctx, unsigned idx, + GLclampd nearval, GLclampd farval) +{ + if (ctx->ViewportArray[idx].Near == nearval && + ctx->ViewportArray[idx].Far == farval) + return; + + ctx->ViewportArray[idx].Near = CLAMP(nearval, 0.0, 1.0); + ctx->ViewportArray[idx].Far = CLAMP(farval, 0.0, 1.0); ctx->NewState |= _NEW_VIEWPORT; #if 1 @@ -88,21 +255,26 @@ _mesa_set_viewport(struct gl_context *ctx, GLint x, GLint y, * the WindowMap matrix being up to date in the driver's Viewport * and DepthRange functions. */ - _math_matrix_viewport(&ctx->Viewport._WindowMap, - ctx->Viewport.X, ctx->Viewport.Y, - ctx->Viewport.Width, ctx->Viewport.Height, - ctx->Viewport.Near, ctx->Viewport.Far, + _math_matrix_viewport(&ctx->ViewportArray[idx]._WindowMap, + ctx->ViewportArray[idx].X, + ctx->ViewportArray[idx].Y, + ctx->ViewportArray[idx].Width, + ctx->ViewportArray[idx].Height, + ctx->ViewportArray[idx].Near, + ctx->ViewportArray[idx].Far, ctx->DrawBuffer->_DepthMaxF); #endif - - if (ctx->Driver.Viewport) { - /* Many drivers will use this call to check for window size changes - * and reallocate the z/stencil/accum/etc buffers if needed. - */ - ctx->Driver.Viewport(ctx); - } } +void +_mesa_set_depth_range(struct gl_context *ctx, unsigned idx, + GLclampd nearval, GLclampd farval) +{ + set_depth_range_no_notify(ctx, idx, nearval, farval); + + if (ctx->Driver.DepthRange) + ctx->Driver.DepthRange(ctx); +} /** * Called by glDepthRange @@ -115,6 +287,7 @@ _mesa_set_viewport(struct gl_context *ctx, GLint x, GLint y, void GLAPIENTRY _mesa_DepthRange(GLclampd nearval, GLclampd farval) { + unsigned i; GET_CURRENT_CONTEXT(ctx); FLUSH_VERTICES(ctx, 0); @@ -122,25 +295,19 @@ _mesa_DepthRange(GLclampd nearval, GLclampd farval) if (MESA_VERBOSE&VERBOSE_API) _mesa_debug(ctx, "glDepthRange %f %f\n", nearval, farval); - if (ctx->Viewport.Near == nearval && - ctx->Viewport.Far == farval) - return; - - ctx->Viewport.Near = (GLfloat) CLAMP(nearval, 0.0, 1.0); - ctx->Viewport.Far = (GLfloat) CLAMP(farval, 0.0, 1.0); - ctx->NewState |= _NEW_VIEWPORT; - -#if 1 - /* XXX remove this someday. Currently the DRI drivers rely on - * the WindowMap matrix being up to date in the driver's Viewport - * and DepthRange functions. + /* The GL_ARB_viewport_array spec says: + * + * "DepthRange sets the depth range for all viewports to the same + * values and is equivalent (assuming no errors are generated) to: + * + * for (uint i = 0; i < MAX_VIEWPORTS; i++) + * DepthRangeIndexed(i, n, f);" + * + * Set the depth range for all of the viewports supported by the + * implementation, but only signal the driver once at the end. */ - _math_matrix_viewport(&ctx->Viewport._WindowMap, - ctx->Viewport.X, ctx->Viewport.Y, - ctx->Viewport.Width, ctx->Viewport.Height, - ctx->Viewport.Near, ctx->Viewport.Far, - ctx->DrawBuffer->_DepthMaxF); -#endif + for (i = 0; i < ctx->Const.MaxViewports; i++) + set_depth_range_no_notify(ctx, i, nearval, farval); if (ctx->Driver.DepthRange) { ctx->Driver.DepthRange(ctx); @@ -153,6 +320,67 @@ _mesa_DepthRangef(GLclampf nearval, GLclampf farval) _mesa_DepthRange(nearval, farval); } +/** + * Update a range DepthRange values + * + * \param first starting array index + * \param count count of DepthRange items to update + * \param v pointer to memory containing + * GLclampd near and far clip-plane values + */ +void GLAPIENTRY +_mesa_DepthRangeArrayv(GLuint first, GLsizei count, const GLclampd *v) +{ + int i; + const struct gl_depthrange_inputs *const p = + (struct gl_depthrange_inputs *) v; + GET_CURRENT_CONTEXT(ctx); + + if (MESA_VERBOSE & VERBOSE_API) + _mesa_debug(ctx, "glDepthRangeArrayv %d %d\n", first, count); + + if ((first + count) > ctx->Const.MaxViewports) { + _mesa_error(ctx, GL_INVALID_VALUE, + "glDepthRangev: first (%d) + count (%d) >= MaxViewports (%d)", + first, count, ctx->Const.MaxViewports); + return; + } + + for (i = 0; i < count; i++) + set_depth_range_no_notify(ctx, i + first, p[i].Near, p[i].Far); + + if (ctx->Driver.DepthRange) + ctx->Driver.DepthRange(ctx); +} + +/** + * Update a single DepthRange + * + * \param index array index to update + * \param nearval specifies the Z buffer value which should correspond to + * the near clip plane + * \param farval specifies the Z buffer value which should correspond to + * the far clip plane + */ +void GLAPIENTRY +_mesa_DepthRangeIndexed(GLuint index, GLclampd nearval, GLclampd farval) +{ + GET_CURRENT_CONTEXT(ctx); + + if (MESA_VERBOSE & VERBOSE_API) + _mesa_debug(ctx, "glDepthRangeIndexed(%d, %f, %f)\n", + index, nearval, farval); + + if (index >= ctx->Const.MaxViewports) { + _mesa_error(ctx, GL_INVALID_VALUE, + "glDepthRangeIndexed: index (%d) >= MaxViewports (%d)", + index, ctx->Const.MaxViewports); + return; + } + + _mesa_set_depth_range(ctx, index, nearval, farval); +} + /** * Initialize the context viewport attribute group. * \param ctx the GL context. @@ -160,18 +388,24 @@ _mesa_DepthRangef(GLclampf nearval, GLclampf farval) void _mesa_init_viewport(struct gl_context *ctx) { GLfloat depthMax = 65535.0F; /* sorf of arbitrary */ + unsigned i; - /* Viewport group */ - ctx->Viewport.X = 0; - ctx->Viewport.Y = 0; - ctx->Viewport.Width = 0; - ctx->Viewport.Height = 0; - ctx->Viewport.Near = 0.0; - ctx->Viewport.Far = 1.0; - _math_matrix_ctr(&ctx->Viewport._WindowMap); - - _math_matrix_viewport(&ctx->Viewport._WindowMap, 0, 0, 0, 0, - 0.0F, 1.0F, depthMax); + /* Note: ctx->Const.MaxViewports may not have been set by the driver yet, + * so just initialize all of them. + */ + for (i = 0; i < MAX_VIEWPORTS; i++) { + /* Viewport group */ + ctx->ViewportArray[i].X = 0; + ctx->ViewportArray[i].Y = 0; + ctx->ViewportArray[i].Width = 0; + ctx->ViewportArray[i].Height = 0; + ctx->ViewportArray[i].Near = 0.0; + ctx->ViewportArray[i].Far = 1.0; + _math_matrix_ctr(&ctx->ViewportArray[i]._WindowMap); + + _math_matrix_viewport(&ctx->ViewportArray[i]._WindowMap, 0, 0, 0, 0, + 0.0F, 1.0F, depthMax); + } } @@ -181,6 +415,9 @@ void _mesa_init_viewport(struct gl_context *ctx) */ void _mesa_free_viewport_data(struct gl_context *ctx) { - _math_matrix_dtr(&ctx->Viewport._WindowMap); + unsigned i; + + for (i = 0; i < MAX_VIEWPORTS; i++) + _math_matrix_dtr(&ctx->ViewportArray[i]._WindowMap); } |