[27866] | 1 |
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| 2 | #include "mtypes.h"
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| 3 | #include "drirenderbuffer.h"
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| 4 | #include "framebuffer.h"
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| 5 | #include "renderbuffer.h"
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| 6 | #include "imports.h"
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| 7 |
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| 8 |
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| 9 | /**
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| 10 | * This will get called when a window (gl_framebuffer) is resized (probably
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| 11 | * via driUpdateFramebufferSize(), below).
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| 12 | * Just update width, height and internal format fields for now.
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| 13 | * There's usually no memory allocation above because the present
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| 14 | * DRI drivers use statically-allocated full-screen buffers. If that's not
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| 15 | * the case for a DRI driver, a different AllocStorage method should
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| 16 | * be used.
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| 17 | */
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| 18 | static GLboolean
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| 19 | driRenderbufferStorage(GLcontext *ctx, struct gl_renderbuffer *rb,
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| 20 | GLenum internalFormat, GLuint width, GLuint height)
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| 21 | {
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| 22 | rb->Width = width;
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| 23 | rb->Height = height;
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| 24 | rb->InternalFormat = internalFormat;
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| 25 | return GL_TRUE;
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| 26 | }
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| 27 |
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| 28 |
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| 29 | static void
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| 30 | driDeleteRenderbuffer(struct gl_renderbuffer *rb)
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| 31 | {
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| 32 | /* don't free rb->Data Chances are it's a memory mapped region for
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| 33 | * the dri drivers.
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| 34 | */
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| 35 | _mesa_free(rb);
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| 36 | }
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| 37 |
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| 38 |
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| 39 | /**
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| 40 | * Allocate a new driRenderbuffer object.
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| 41 | * Individual drivers are free to implement different versions of
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| 42 | * this function.
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| 43 | *
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| 44 | * At this time, this function can only be used for window-system
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| 45 | * renderbuffers, not user-created RBOs.
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| 46 | *
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| 47 | * \param format Either GL_RGBA, GL_DEPTH_COMPONENT16, GL_DEPTH_COMPONENT24,
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| 48 | * GL_DEPTH_COMPONENT32, or GL_STENCIL_INDEX8_EXT (for now).
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| 49 | * \param addr address in main memory of the buffer. Probably a memory
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| 50 | * mapped region.
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| 51 | * \param cpp chars or bytes per pixel
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| 52 | * \param offset start of renderbuffer with respect to start of framebuffer
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| 53 | * \param pitch pixels per row
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| 54 | */
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| 55 | driRenderbuffer *
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| 56 | driNewRenderbuffer(GLenum format, GLvoid *addr,
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| 57 | GLint cpp, GLint offset, GLint pitch,
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| 58 | __DRIdrawablePrivate *dPriv)
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| 59 | {
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| 60 | driRenderbuffer *drb;
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| 61 |
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| 62 | assert(format == GL_RGBA ||
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| 63 | format == GL_RGB5 ||
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| 64 | format == GL_RGBA8 ||
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| 65 | format == GL_DEPTH_COMPONENT16 ||
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| 66 | format == GL_DEPTH_COMPONENT24 ||
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| 67 | format == GL_DEPTH_COMPONENT32 ||
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| 68 | format == GL_STENCIL_INDEX8_EXT);
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| 69 |
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| 70 | assert(cpp > 0);
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| 71 | assert(pitch > 0);
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| 72 |
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| 73 | drb = _mesa_calloc(sizeof(driRenderbuffer));
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| 74 | if (drb) {
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| 75 | const GLuint name = 0;
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| 76 |
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| 77 | _mesa_init_renderbuffer(&drb->Base, name);
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| 78 |
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| 79 | /* Make sure we're using a null-valued GetPointer routine */
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| 80 | assert(drb->Base.GetPointer(NULL, &drb->Base, 0, 0) == NULL);
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| 81 |
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| 82 | drb->Base.InternalFormat = format;
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| 83 |
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| 84 | if (format == GL_RGBA || format == GL_RGB5 || format == GL_RGBA8) {
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| 85 | /* Color */
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| 86 | drb->Base._BaseFormat = GL_RGBA;
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| 87 | drb->Base.DataType = GL_UNSIGNED_BYTE;
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| 88 | if (format == GL_RGB5) {
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| 89 | drb->Base.RedBits = 5;
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| 90 | drb->Base.GreenBits = 6;
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| 91 | drb->Base.BlueBits = 5;
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| 92 | }
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| 93 | else {
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| 94 | drb->Base.RedBits =
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| 95 | drb->Base.GreenBits =
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| 96 | drb->Base.BlueBits =
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| 97 | drb->Base.AlphaBits = 8;
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| 98 | }
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| 99 | }
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| 100 | else if (format == GL_DEPTH_COMPONENT16) {
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| 101 | /* Depth */
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| 102 | drb->Base._BaseFormat = GL_DEPTH_COMPONENT;
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| 103 | /* we always Get/Put 32-bit Z values */
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| 104 | drb->Base.DataType = GL_UNSIGNED_INT;
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| 105 | drb->Base.DepthBits = 16;
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| 106 | }
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| 107 | else if (format == GL_DEPTH_COMPONENT24) {
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| 108 | /* Depth */
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| 109 | drb->Base._BaseFormat = GL_DEPTH_COMPONENT;
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| 110 | /* we always Get/Put 32-bit Z values */
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| 111 | drb->Base.DataType = GL_UNSIGNED_INT;
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| 112 | drb->Base.DepthBits = 24;
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| 113 | }
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| 114 | else if (format == GL_DEPTH_COMPONENT32) {
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| 115 | /* Depth */
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| 116 | drb->Base._BaseFormat = GL_DEPTH_COMPONENT;
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| 117 | /* we always Get/Put 32-bit Z values */
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| 118 | drb->Base.DataType = GL_UNSIGNED_INT;
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| 119 | drb->Base.DepthBits = 32;
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| 120 | }
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| 121 | else {
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| 122 | /* Stencil */
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| 123 | ASSERT(format == GL_STENCIL_INDEX8_EXT);
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| 124 | drb->Base._BaseFormat = GL_STENCIL_INDEX;
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| 125 | drb->Base.DataType = GL_UNSIGNED_BYTE;
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| 126 | drb->Base.StencilBits = 8;
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| 127 | }
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| 128 |
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| 129 | /* XXX if we were allocating a user-created renderbuffer, we'd have
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| 130 | * to fill in the Red/Green/Blue/.../Bits values too.
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| 131 | */
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| 132 |
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| 133 | drb->Base.AllocStorage = driRenderbufferStorage;
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| 134 | drb->Base.Delete = driDeleteRenderbuffer;
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| 135 |
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| 136 | drb->Base.Data = addr;
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| 137 |
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| 138 | /* DRI renderbuffer-specific fields: */
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| 139 | drb->dPriv = dPriv;
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| 140 | drb->offset = offset;
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| 141 | drb->pitch = pitch;
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| 142 | drb->cpp = cpp;
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| 143 |
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| 144 | /* may be changed if page flipping is active: */
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| 145 | drb->flippedOffset = offset;
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| 146 | drb->flippedPitch = pitch;
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| 147 | drb->flippedData = addr;
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| 148 | }
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| 149 | return drb;
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| 150 | }
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| 151 |
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| 152 |
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| 153 | /**
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| 154 | * Update the front and back renderbuffers' flippedPitch/Offset/Data fields.
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| 155 | * If stereo, flip both the left and right pairs.
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| 156 | * This is used when we do double buffering via page flipping.
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| 157 | * \param fb the framebuffer we're page flipping
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| 158 | * \param flipped if true, set flipped values, else set non-flipped values
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| 159 | */
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| 160 | void
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| 161 | driFlipRenderbuffers(struct gl_framebuffer *fb, GLboolean flipped)
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| 162 | {
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| 163 | const GLuint count = fb->Visual.stereoMode ? 2 : 1;
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| 164 | GLuint lr; /* left or right */
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| 165 |
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| 166 | /* we shouldn't really call this function if single-buffered, but
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| 167 | * play it safe.
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| 168 | */
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| 169 | if (!fb->Visual.doubleBufferMode)
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| 170 | return;
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| 171 |
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| 172 | for (lr = 0; lr < count; lr++) {
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| 173 | GLuint frontBuf = (lr == 0) ? BUFFER_FRONT_LEFT : BUFFER_FRONT_RIGHT;
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| 174 | GLuint backBuf = (lr == 0) ? BUFFER_BACK_LEFT : BUFFER_BACK_RIGHT;
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| 175 | driRenderbuffer *front_drb
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| 176 | = (driRenderbuffer *) fb->Attachment[frontBuf].Renderbuffer;
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| 177 | driRenderbuffer *back_drb
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| 178 | = (driRenderbuffer *) fb->Attachment[backBuf].Renderbuffer;
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| 179 |
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| 180 | if (flipped) {
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| 181 | front_drb->flippedOffset = back_drb->offset;
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| 182 | front_drb->flippedPitch = back_drb->pitch;
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| 183 | front_drb->flippedData = back_drb->Base.Data;
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| 184 | back_drb->flippedOffset = front_drb->offset;
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| 185 | back_drb->flippedPitch = front_drb->pitch;
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| 186 | back_drb->flippedData = front_drb->Base.Data;
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| 187 | }
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| 188 | else {
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| 189 | front_drb->flippedOffset = front_drb->offset;
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| 190 | front_drb->flippedPitch = front_drb->pitch;
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| 191 | front_drb->flippedData = front_drb->Base.Data;
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| 192 | back_drb->flippedOffset = back_drb->offset;
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| 193 | back_drb->flippedPitch = back_drb->pitch;
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| 194 | back_drb->flippedData = back_drb->Base.Data;
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| 195 | }
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| 196 | }
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| 197 | }
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| 198 |
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| 199 |
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| 200 | /**
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| 201 | * Check that the gl_framebuffer associated with dPriv is the right size.
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| 202 | * Resize the gl_framebuffer if needed.
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| 203 | * It's expected that the dPriv->driverPrivate member points to a
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| 204 | * gl_framebuffer object.
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| 205 | */
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| 206 | void
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| 207 | driUpdateFramebufferSize(GLcontext *ctx, const __DRIdrawablePrivate *dPriv)
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| 208 | {
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| 209 | struct gl_framebuffer *fb = (struct gl_framebuffer *) dPriv->driverPrivate;
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| 210 | if (fb && (dPriv->w != fb->Width || dPriv->h != fb->Height)) {
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| 211 | ctx->Driver.ResizeBuffers(ctx, fb, dPriv->w, dPriv->h);
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| 212 | assert(fb->Width == dPriv->w);
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| 213 | assert(fb->Height == dPriv->h);
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| 214 | }
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| 215 | }
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